SmartPDCode/ip/appweb/inc/mbedtls.h

/*
 *  MbedTLS Source Code Library Header
 */

#include "me.h"

#if ME_COM_MBEDTLS

#if defined(MBEDTLS_CONFIG_FILE)
#include MBEDTLS_CONFIG_FILE
#endif



/********* Start of file library/common.h ************/

/**
 * \file common.h
 *
 * \brief Utility macros for internal use in the library
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_LIBRARY_COMMON_H
#define MBEDTLS_LIBRARY_COMMON_H

#if defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stdint.h>

/** Helper to define a function as static except when building invasive tests.
 *
 * If a function is only used inside its own source file and should be
 * declared `static` to allow the compiler to optimize for code size,
 * but that function has unit tests, define it with
 * ```
 * MBEDTLS_STATIC_TESTABLE int mbedtls_foo(...) { ... }
 * ```
 * and declare it in a header in the `library/` directory with
 * ```
 * #if defined(MBEDTLS_TEST_HOOKS)
 * int mbedtls_foo(...);
 * #endif
 * ```
 */
#if defined(MBEDTLS_TEST_HOOKS)
#define MBEDTLS_STATIC_TESTABLE
#else
#define MBEDTLS_STATIC_TESTABLE static
#endif

/** Byte Reading Macros
 *
 * Given a multi-byte integer \p x, MBEDTLS_BYTE_n retrieves the n-th
 * byte from x, where byte 0 is the least significant byte.
 */
#define MBEDTLS_BYTE_0( x ) ( (uint8_t) (   ( x )         & 0xff ) )
#define MBEDTLS_BYTE_1( x ) ( (uint8_t) ( ( ( x ) >> 8  ) & 0xff ) )
#define MBEDTLS_BYTE_2( x ) ( (uint8_t) ( ( ( x ) >> 16 ) & 0xff ) )
#define MBEDTLS_BYTE_3( x ) ( (uint8_t) ( ( ( x ) >> 24 ) & 0xff ) )
#define MBEDTLS_BYTE_4( x ) ( (uint8_t) ( ( ( x ) >> 32 ) & 0xff ) )
#define MBEDTLS_BYTE_5( x ) ( (uint8_t) ( ( ( x ) >> 40 ) & 0xff ) )
#define MBEDTLS_BYTE_6( x ) ( (uint8_t) ( ( ( x ) >> 48 ) & 0xff ) )
#define MBEDTLS_BYTE_7( x ) ( (uint8_t) ( ( ( x ) >> 56 ) & 0xff ) )

/**
 * Get the unsigned 32 bits integer corresponding to four bytes in
 * big-endian order (MSB first).
 *
 * \param   data    Base address of the memory to get the four bytes from.
 * \param   offset  Offset from \p base of the first and most significant
 *                  byte of the four bytes to build the 32 bits unsigned
 *                  integer from.
 */
#ifndef MBEDTLS_GET_UINT32_BE
#define MBEDTLS_GET_UINT32_BE( data , offset )                  \
    (                                                           \
          ( (uint32_t) ( data )[( offset )    ] << 24 )         \
        | ( (uint32_t) ( data )[( offset ) + 1] << 16 )         \
        | ( (uint32_t) ( data )[( offset ) + 2] <<  8 )         \
        | ( (uint32_t) ( data )[( offset ) + 3]       )         \
    )
#endif

/**
 * Put in memory a 32 bits unsigned integer in big-endian order.
 *
 * \param   n       32 bits unsigned integer to put in memory.
 * \param   data    Base address of the memory where to put the 32
 *                  bits unsigned integer in.
 * \param   offset  Offset from \p base where to put the most significant
 *                  byte of the 32 bits unsigned integer \p n.
 */
#ifndef MBEDTLS_PUT_UINT32_BE
#define MBEDTLS_PUT_UINT32_BE( n, data, offset )                \
{                                                               \
    ( data )[( offset )    ] = MBEDTLS_BYTE_3( n );             \
    ( data )[( offset ) + 1] = MBEDTLS_BYTE_2( n );             \
    ( data )[( offset ) + 2] = MBEDTLS_BYTE_1( n );             \
    ( data )[( offset ) + 3] = MBEDTLS_BYTE_0( n );             \
}
#endif

/**
 * Get the unsigned 32 bits integer corresponding to four bytes in
 * little-endian order (LSB first).
 *
 * \param   data    Base address of the memory to get the four bytes from.
 * \param   offset  Offset from \p base of the first and least significant
 *                  byte of the four bytes to build the 32 bits unsigned
 *                  integer from.
 */
#ifndef MBEDTLS_GET_UINT32_LE
#define MBEDTLS_GET_UINT32_LE( data, offset )                   \
    (                                                           \
          ( (uint32_t) ( data )[( offset )    ]       )         \
        | ( (uint32_t) ( data )[( offset ) + 1] <<  8 )         \
        | ( (uint32_t) ( data )[( offset ) + 2] << 16 )         \
        | ( (uint32_t) ( data )[( offset ) + 3] << 24 )         \
    )
#endif

/**
 * Put in memory a 32 bits unsigned integer in little-endian order.
 *
 * \param   n       32 bits unsigned integer to put in memory.
 * \param   data    Base address of the memory where to put the 32
 *                  bits unsigned integer in.
 * \param   offset  Offset from \p base where to put the least significant
 *                  byte of the 32 bits unsigned integer \p n.
 */
#ifndef MBEDTLS_PUT_UINT32_LE
#define MBEDTLS_PUT_UINT32_LE( n, data, offset )                \
{                                                               \
    ( data )[( offset )    ] = MBEDTLS_BYTE_0( n );             \
    ( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n );             \
    ( data )[( offset ) + 2] = MBEDTLS_BYTE_2( n );             \
    ( data )[( offset ) + 3] = MBEDTLS_BYTE_3( n );             \
}
#endif

/**
 * Get the unsigned 16 bits integer corresponding to two bytes in
 * little-endian order (LSB first).
 *
 * \param   data    Base address of the memory to get the two bytes from.
 * \param   offset  Offset from \p base of the first and least significant
 *                  byte of the two bytes to build the 16 bits unsigned
 *                  integer from.
 */
#ifndef MBEDTLS_GET_UINT16_LE
#define MBEDTLS_GET_UINT16_LE( data, offset )                   \
    (                                                           \
          ( (uint16_t) ( data )[( offset )    ]       )         \
        | ( (uint16_t) ( data )[( offset ) + 1] <<  8 )         \
    )
#endif

/**
 * Put in memory a 16 bits unsigned integer in little-endian order.
 *
 * \param   n       16 bits unsigned integer to put in memory.
 * \param   data    Base address of the memory where to put the 16
 *                  bits unsigned integer in.
 * \param   offset  Offset from \p base where to put the least significant
 *                  byte of the 16 bits unsigned integer \p n.
 */
#ifndef MBEDTLS_PUT_UINT16_LE
#define MBEDTLS_PUT_UINT16_LE( n, data, offset )                \
{                                                               \
    ( data )[( offset )    ] = MBEDTLS_BYTE_0( n );             \
    ( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n );             \
}
#endif

/**
 * Get the unsigned 16 bits integer corresponding to two bytes in
 * big-endian order (MSB first).
 *
 * \param   data    Base address of the memory to get the two bytes from.
 * \param   offset  Offset from \p base of the first and most significant
 *                  byte of the two bytes to build the 16 bits unsigned
 *                  integer from.
 */
#ifndef MBEDTLS_GET_UINT16_BE
#define MBEDTLS_GET_UINT16_BE( data, offset )                   \
    (                                                           \
          ( (uint16_t) ( data )[( offset )    ] << 8 )          \
        | ( (uint16_t) ( data )[( offset ) + 1]      )          \
    )
#endif

/**
 * Put in memory a 16 bits unsigned integer in big-endian order.
 *
 * \param   n       16 bits unsigned integer to put in memory.
 * \param   data    Base address of the memory where to put the 16
 *                  bits unsigned integer in.
 * \param   offset  Offset from \p base where to put the most significant
 *                  byte of the 16 bits unsigned integer \p n.
 */
#ifndef MBEDTLS_PUT_UINT16_BE
#define MBEDTLS_PUT_UINT16_BE( n, data, offset )                \
{                                                               \
    ( data )[( offset )    ] = MBEDTLS_BYTE_1( n );             \
    ( data )[( offset ) + 1] = MBEDTLS_BYTE_0( n );             \
}
#endif

/**
 * Get the unsigned 64 bits integer corresponding to eight bytes in
 * big-endian order (MSB first).
 *
 * \param   data    Base address of the memory to get the eight bytes from.
 * \param   offset  Offset from \p base of the first and most significant
 *                  byte of the eight bytes to build the 64 bits unsigned
 *                  integer from.
 */
#ifndef MBEDTLS_GET_UINT64_BE
#define MBEDTLS_GET_UINT64_BE( data, offset )                   \
    (                                                           \
          ( (uint64_t) ( data )[( offset )    ] << 56 )         \
        | ( (uint64_t) ( data )[( offset ) + 1] << 48 )         \
        | ( (uint64_t) ( data )[( offset ) + 2] << 40 )         \
        | ( (uint64_t) ( data )[( offset ) + 3] << 32 )         \
        | ( (uint64_t) ( data )[( offset ) + 4] << 24 )         \
        | ( (uint64_t) ( data )[( offset ) + 5] << 16 )         \
        | ( (uint64_t) ( data )[( offset ) + 6] <<  8 )         \
        | ( (uint64_t) ( data )[( offset ) + 7]       )         \
    )
#endif

/**
 * Put in memory a 64 bits unsigned integer in big-endian order.
 *
 * \param   n       64 bits unsigned integer to put in memory.
 * \param   data    Base address of the memory where to put the 64
 *                  bits unsigned integer in.
 * \param   offset  Offset from \p base where to put the most significant
 *                  byte of the 64 bits unsigned integer \p n.
 */
#ifndef MBEDTLS_PUT_UINT64_BE
#define MBEDTLS_PUT_UINT64_BE( n, data, offset )                \
{                                                               \
    ( data )[( offset )    ] = MBEDTLS_BYTE_7( n );             \
    ( data )[( offset ) + 1] = MBEDTLS_BYTE_6( n );             \
    ( data )[( offset ) + 2] = MBEDTLS_BYTE_5( n );             \
    ( data )[( offset ) + 3] = MBEDTLS_BYTE_4( n );             \
    ( data )[( offset ) + 4] = MBEDTLS_BYTE_3( n );             \
    ( data )[( offset ) + 5] = MBEDTLS_BYTE_2( n );             \
    ( data )[( offset ) + 6] = MBEDTLS_BYTE_1( n );             \
    ( data )[( offset ) + 7] = MBEDTLS_BYTE_0( n );             \
}
#endif

/**
 * Get the unsigned 64 bits integer corresponding to eight bytes in
 * little-endian order (LSB first).
 *
 * \param   data    Base address of the memory to get the eight bytes from.
 * \param   offset  Offset from \p base of the first and least significant
 *                  byte of the eight bytes to build the 64 bits unsigned
 *                  integer from.
 */
#ifndef MBEDTLS_GET_UINT64_LE
#define MBEDTLS_GET_UINT64_LE( data, offset )                   \
    (                                                           \
          ( (uint64_t) ( data )[( offset ) + 7] << 56 )         \
        | ( (uint64_t) ( data )[( offset ) + 6] << 48 )         \
        | ( (uint64_t) ( data )[( offset ) + 5] << 40 )         \
        | ( (uint64_t) ( data )[( offset ) + 4] << 32 )         \
        | ( (uint64_t) ( data )[( offset ) + 3] << 24 )         \
        | ( (uint64_t) ( data )[( offset ) + 2] << 16 )         \
        | ( (uint64_t) ( data )[( offset ) + 1] <<  8 )         \
        | ( (uint64_t) ( data )[( offset )    ]       )         \
    )
#endif

/**
 * Put in memory a 64 bits unsigned integer in little-endian order.
 *
 * \param   n       64 bits unsigned integer to put in memory.
 * \param   data    Base address of the memory where to put the 64
 *                  bits unsigned integer in.
 * \param   offset  Offset from \p base where to put the least significant
 *                  byte of the 64 bits unsigned integer \p n.
 */
#ifndef MBEDTLS_PUT_UINT64_LE
#define MBEDTLS_PUT_UINT64_LE( n, data, offset )                \
{                                                               \
    ( data )[( offset )    ] = MBEDTLS_BYTE_0( n );             \
    ( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n );             \
    ( data )[( offset ) + 2] = MBEDTLS_BYTE_2( n );             \
    ( data )[( offset ) + 3] = MBEDTLS_BYTE_3( n );             \
    ( data )[( offset ) + 4] = MBEDTLS_BYTE_4( n );             \
    ( data )[( offset ) + 5] = MBEDTLS_BYTE_5( n );             \
    ( data )[( offset ) + 6] = MBEDTLS_BYTE_6( n );             \
    ( data )[( offset ) + 7] = MBEDTLS_BYTE_7( n );             \
}
#endif

#endif /* MBEDTLS_LIBRARY_COMMON_H */


/********* Start of file include/mbedtls/config.h ************/

/**
 * \file config.h
 *
 * \brief Configuration options (set of defines)
 *
 *  This set of compile-time options may be used to enable
 *  or disable features selectively, and reduce the global
 *  memory footprint.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_CONFIG_H
#define MBEDTLS_CONFIG_H

#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
#define _CRT_SECURE_NO_DEPRECATE 1
#endif

/**
 * \name SECTION: System support
 *
 * This section sets system specific settings.
 * \{
 */

/**
 * \def MBEDTLS_HAVE_ASM
 *
 * The compiler has support for asm().
 *
 * Requires support for asm() in compiler.
 *
 * Used in:
 *      library/aria.c
 *      library/timing.c
 *      include/mbedtls/bn_mul.h
 *
 * Required by:
 *      MBEDTLS_AESNI_C
 *      MBEDTLS_PADLOCK_C
 *
 * Comment to disable the use of assembly code.
 */
#define MBEDTLS_HAVE_ASM

/**
 * \def MBEDTLS_NO_UDBL_DIVISION
 *
 * The platform lacks support for double-width integer division (64-bit
 * division on a 32-bit platform, 128-bit division on a 64-bit platform).
 *
 * Used in:
 *      include/mbedtls/bignum.h
 *      library/bignum.c
 *
 * The bignum code uses double-width division to speed up some operations.
 * Double-width division is often implemented in software that needs to
 * be linked with the program. The presence of a double-width integer
 * type is usually detected automatically through preprocessor macros,
 * but the automatic detection cannot know whether the code needs to
 * and can be linked with an implementation of division for that type.
 * By default division is assumed to be usable if the type is present.
 * Uncomment this option to prevent the use of double-width division.
 *
 * Note that division for the native integer type is always required.
 * Furthermore, a 64-bit type is always required even on a 32-bit
 * platform, but it need not support multiplication or division. In some
 * cases it is also desirable to disable some double-width operations. For
 * example, if double-width division is implemented in software, disabling
 * it can reduce code size in some embedded targets.
 */
//#define MBEDTLS_NO_UDBL_DIVISION

/**
 * \def MBEDTLS_NO_64BIT_MULTIPLICATION
 *
 * The platform lacks support for 32x32 -> 64-bit multiplication.
 *
 * Used in:
 *      library/poly1305.c
 *
 * Some parts of the library may use multiplication of two unsigned 32-bit
 * operands with a 64-bit result in order to speed up computations. On some
 * platforms, this is not available in hardware and has to be implemented in
 * software, usually in a library provided by the toolchain.
 *
 * Sometimes it is not desirable to have to link to that library. This option
 * removes the dependency of that library on platforms that lack a hardware
 * 64-bit multiplier by embedding a software implementation in Mbed TLS.
 *
 * Note that depending on the compiler, this may decrease performance compared
 * to using the library function provided by the toolchain.
 */
//#define MBEDTLS_NO_64BIT_MULTIPLICATION

/**
 * \def MBEDTLS_HAVE_SSE2
 *
 * CPU supports SSE2 instruction set.
 *
 * Uncomment if the CPU supports SSE2 (IA-32 specific).
 */
//#define MBEDTLS_HAVE_SSE2

/**
 * \def MBEDTLS_HAVE_TIME
 *
 * System has time.h and time().
 * The time does not need to be correct, only time differences are used,
 * by contrast with MBEDTLS_HAVE_TIME_DATE
 *
 * Defining MBEDTLS_HAVE_TIME allows you to specify MBEDTLS_PLATFORM_TIME_ALT,
 * MBEDTLS_PLATFORM_TIME_MACRO, MBEDTLS_PLATFORM_TIME_TYPE_MACRO and
 * MBEDTLS_PLATFORM_STD_TIME.
 *
 * Comment if your system does not support time functions
 */
#define MBEDTLS_HAVE_TIME

/**
 * \def MBEDTLS_HAVE_TIME_DATE
 *
 * System has time.h, time(), and an implementation for
 * mbedtls_platform_gmtime_r() (see below).
 * The time needs to be correct (not necessarily very accurate, but at least
 * the date should be correct). This is used to verify the validity period of
 * X.509 certificates.
 *
 * Comment if your system does not have a correct clock.
 *
 * \note mbedtls_platform_gmtime_r() is an abstraction in platform_util.h that
 * behaves similarly to the gmtime_r() function from the C standard. Refer to
 * the documentation for mbedtls_platform_gmtime_r() for more information.
 *
 * \note It is possible to configure an implementation for
 * mbedtls_platform_gmtime_r() at compile-time by using the macro
 * MBEDTLS_PLATFORM_GMTIME_R_ALT.
 */
#define MBEDTLS_HAVE_TIME_DATE

/**
 * \def MBEDTLS_PLATFORM_MEMORY
 *
 * Enable the memory allocation layer.
 *
 * By default mbed TLS uses the system-provided calloc() and free().
 * This allows different allocators (self-implemented or provided) to be
 * provided to the platform abstraction layer.
 *
 * Enabling MBEDTLS_PLATFORM_MEMORY without the
 * MBEDTLS_PLATFORM_{FREE,CALLOC}_MACROs will provide
 * "mbedtls_platform_set_calloc_free()" allowing you to set an alternative calloc() and
 * free() function pointer at runtime.
 *
 * Enabling MBEDTLS_PLATFORM_MEMORY and specifying
 * MBEDTLS_PLATFORM_{CALLOC,FREE}_MACROs will allow you to specify the
 * alternate function at compile time.
 *
 * Requires: MBEDTLS_PLATFORM_C
 *
 * Enable this layer to allow use of alternative memory allocators.
 */
//#define MBEDTLS_PLATFORM_MEMORY

/**
 * \def MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
 *
 * Do not assign standard functions in the platform layer (e.g. calloc() to
 * MBEDTLS_PLATFORM_STD_CALLOC and printf() to MBEDTLS_PLATFORM_STD_PRINTF)
 *
 * This makes sure there are no linking errors on platforms that do not support
 * these functions. You will HAVE to provide alternatives, either at runtime
 * via the platform_set_xxx() functions or at compile time by setting
 * the MBEDTLS_PLATFORM_STD_XXX defines, or enabling a
 * MBEDTLS_PLATFORM_XXX_MACRO.
 *
 * Requires: MBEDTLS_PLATFORM_C
 *
 * Uncomment to prevent default assignment of standard functions in the
 * platform layer.
 */
//#define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS

/**
 * \def MBEDTLS_PLATFORM_EXIT_ALT
 *
 * MBEDTLS_PLATFORM_XXX_ALT: Uncomment a macro to let mbed TLS support the
 * function in the platform abstraction layer.
 *
 * Example: In case you uncomment MBEDTLS_PLATFORM_PRINTF_ALT, mbed TLS will
 * provide a function "mbedtls_platform_set_printf()" that allows you to set an
 * alternative printf function pointer.
 *
 * All these define require MBEDTLS_PLATFORM_C to be defined!
 *
 * \note MBEDTLS_PLATFORM_SNPRINTF_ALT is required on Windows;
 * it will be enabled automatically by check_config.h
 *
 * \warning MBEDTLS_PLATFORM_XXX_ALT cannot be defined at the same time as
 * MBEDTLS_PLATFORM_XXX_MACRO!
 *
 * Requires: MBEDTLS_PLATFORM_TIME_ALT requires MBEDTLS_HAVE_TIME
 *
 * Uncomment a macro to enable alternate implementation of specific base
 * platform function
 */
//#define MBEDTLS_PLATFORM_EXIT_ALT
//#define MBEDTLS_PLATFORM_TIME_ALT
//#define MBEDTLS_PLATFORM_FPRINTF_ALT
//#define MBEDTLS_PLATFORM_PRINTF_ALT
//#define MBEDTLS_PLATFORM_SNPRINTF_ALT
//#define MBEDTLS_PLATFORM_VSNPRINTF_ALT
//#define MBEDTLS_PLATFORM_NV_SEED_ALT
//#define MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT

/**
 * \def MBEDTLS_DEPRECATED_WARNING
 *
 * Mark deprecated functions and features so that they generate a warning if
 * used. Functionality deprecated in one version will usually be removed in the
 * next version. You can enable this to help you prepare the transition to a
 * new major version by making sure your code is not using this functionality.
 *
 * This only works with GCC and Clang. With other compilers, you may want to
 * use MBEDTLS_DEPRECATED_REMOVED
 *
 * Uncomment to get warnings on using deprecated functions and features.
 */
//#define MBEDTLS_DEPRECATED_WARNING

/**
 * \def MBEDTLS_DEPRECATED_REMOVED
 *
 * Remove deprecated functions and features so that they generate an error if
 * used. Functionality deprecated in one version will usually be removed in the
 * next version. You can enable this to help you prepare the transition to a
 * new major version by making sure your code is not using this functionality.
 *
 * Uncomment to get errors on using deprecated functions and features.
 */
//#define MBEDTLS_DEPRECATED_REMOVED

/**
 * \def MBEDTLS_CHECK_PARAMS
 *
 * This configuration option controls whether the library validates more of
 * the parameters passed to it.
 *
 * When this flag is not defined, the library only attempts to validate an
 * input parameter if: (1) they may come from the outside world (such as the
 * network, the filesystem, etc.) or (2) not validating them could result in
 * internal memory errors such as overflowing a buffer controlled by the
 * library. On the other hand, it doesn't attempt to validate parameters whose
 * values are fully controlled by the application (such as pointers).
 *
 * When this flag is defined, the library additionally attempts to validate
 * parameters that are fully controlled by the application, and should always
 * be valid if the application code is fully correct and trusted.
 *
 * For example, when a function accepts as input a pointer to a buffer that may
 * contain untrusted data, and its documentation mentions that this pointer
 * must not be NULL:
 * - The pointer is checked to be non-NULL only if this option is enabled.
 * - The content of the buffer is always validated.
 *
 * When this flag is defined, if a library function receives a parameter that
 * is invalid:
 * 1. The function will invoke the macro MBEDTLS_PARAM_FAILED().
 * 2. If MBEDTLS_PARAM_FAILED() did not terminate the program, the function
 *   will immediately return. If the function returns an Mbed TLS error code,
 *   the error code in this case is MBEDTLS_ERR_xxx_BAD_INPUT_DATA.
 *
 * When defining this flag, you also need to arrange a definition for
 * MBEDTLS_PARAM_FAILED(). You can do this by any of the following methods:
 * - By default, the library defines MBEDTLS_PARAM_FAILED() to call a
 *   function mbedtls_param_failed(), but the library does not define this
 *   function. If you do not make any other arrangements, you must provide
 *   the function mbedtls_param_failed() in your application.
 *   See `platform_util.h` for its prototype.
 * - If you enable the macro #MBEDTLS_CHECK_PARAMS_ASSERT, then the
 *   library defines MBEDTLS_PARAM_FAILED(\c cond) to be `assert(cond)`.
 *   You can still supply an alternative definition of
 *   MBEDTLS_PARAM_FAILED(), which may call `assert`.
 * - If you define a macro MBEDTLS_PARAM_FAILED() before including `config.h`
 *   or you uncomment the definition of MBEDTLS_PARAM_FAILED() in `config.h`,
 *   the library will call the macro that you defined and will not supply
 *   its own version. Note that if MBEDTLS_PARAM_FAILED() calls `assert`,
 *   you need to enable #MBEDTLS_CHECK_PARAMS_ASSERT so that library source
 *   files include `<assert.h>`.
 *
 * Uncomment to enable validation of application-controlled parameters.
 */
//#define MBEDTLS_CHECK_PARAMS

/**
 * \def MBEDTLS_CHECK_PARAMS_ASSERT
 *
 * Allow MBEDTLS_PARAM_FAILED() to call `assert`, and make it default to
 * `assert`. This macro is only used if #MBEDTLS_CHECK_PARAMS is defined.
 *
 * If this macro is not defined, then MBEDTLS_PARAM_FAILED() defaults to
 * calling a function mbedtls_param_failed(). See the documentation of
 * #MBEDTLS_CHECK_PARAMS for details.
 *
 * Uncomment to allow MBEDTLS_PARAM_FAILED() to call `assert`.
 */
//#define MBEDTLS_CHECK_PARAMS_ASSERT

/* \} name SECTION: System support */

/**
 * \name SECTION: mbed TLS feature support
 *
 * This section sets support for features that are or are not needed
 * within the modules that are enabled.
 * \{
 */

/**
 * \def MBEDTLS_TIMING_ALT
 *
 * Uncomment to provide your own alternate implementation for mbedtls_timing_hardclock(),
 * mbedtls_timing_get_timer(), mbedtls_set_alarm(), mbedtls_set/get_delay()
 *
 * Only works if you have MBEDTLS_TIMING_C enabled.
 *
 * You will need to provide a header "timing_alt.h" and an implementation at
 * compile time.
 */
//#define MBEDTLS_TIMING_ALT

/**
 * \def MBEDTLS_AES_ALT
 *
 * MBEDTLS__MODULE_NAME__ALT: Uncomment a macro to let mbed TLS use your
 * alternate core implementation of a symmetric crypto, an arithmetic or hash
 * module (e.g. platform specific assembly optimized implementations). Keep
 * in mind that the function prototypes should remain the same.
 *
 * This replaces the whole module. If you only want to replace one of the
 * functions, use one of the MBEDTLS__FUNCTION_NAME__ALT flags.
 *
 * Example: In case you uncomment MBEDTLS_AES_ALT, mbed TLS will no longer
 * provide the "struct mbedtls_aes_context" definition and omit the base
 * function declarations and implementations. "aes_alt.h" will be included from
 * "aes.h" to include the new function definitions.
 *
 * Uncomment a macro to enable alternate implementation of the corresponding
 * module.
 *
 * \warning   MD2, MD4, MD5, ARC4, DES and SHA-1 are considered weak and their
 *            use constitutes a security risk. If possible, we recommend
 *            avoiding dependencies on them, and considering stronger message
 *            digests and ciphers instead.
 *
 */
//#define MBEDTLS_AES_ALT
//#define MBEDTLS_ARC4_ALT
//#define MBEDTLS_ARIA_ALT
//#define MBEDTLS_BLOWFISH_ALT
//#define MBEDTLS_CAMELLIA_ALT
//#define MBEDTLS_CCM_ALT
//#define MBEDTLS_CHACHA20_ALT
//#define MBEDTLS_CHACHAPOLY_ALT
//#define MBEDTLS_CMAC_ALT
//#define MBEDTLS_DES_ALT
//#define MBEDTLS_DHM_ALT
//#define MBEDTLS_ECJPAKE_ALT
//#define MBEDTLS_GCM_ALT
//#define MBEDTLS_NIST_KW_ALT
//#define MBEDTLS_MD2_ALT
//#define MBEDTLS_MD4_ALT
//#define MBEDTLS_MD5_ALT
//#define MBEDTLS_POLY1305_ALT
//#define MBEDTLS_RIPEMD160_ALT
//#define MBEDTLS_RSA_ALT
//#define MBEDTLS_SHA1_ALT
//#define MBEDTLS_SHA256_ALT
//#define MBEDTLS_SHA512_ALT
//#define MBEDTLS_XTEA_ALT

/*
 * When replacing the elliptic curve module, pleace consider, that it is
 * implemented with two .c files:
 *      - ecp.c
 *      - ecp_curves.c
 * You can replace them very much like all the other MBEDTLS__MODULE_NAME__ALT
 * macros as described above. The only difference is that you have to make sure
 * that you provide functionality for both .c files.
 */
//#define MBEDTLS_ECP_ALT

/**
 * \def MBEDTLS_MD2_PROCESS_ALT
 *
 * MBEDTLS__FUNCTION_NAME__ALT: Uncomment a macro to let mbed TLS use you
 * alternate core implementation of symmetric crypto or hash function. Keep in
 * mind that function prototypes should remain the same.
 *
 * This replaces only one function. The header file from mbed TLS is still
 * used, in contrast to the MBEDTLS__MODULE_NAME__ALT flags.
 *
 * Example: In case you uncomment MBEDTLS_SHA256_PROCESS_ALT, mbed TLS will
 * no longer provide the mbedtls_sha1_process() function, but it will still provide
 * the other function (using your mbedtls_sha1_process() function) and the definition
 * of mbedtls_sha1_context, so your implementation of mbedtls_sha1_process must be compatible
 * with this definition.
 *
 * \note Because of a signature change, the core AES encryption and decryption routines are
 *       currently named mbedtls_aes_internal_encrypt and mbedtls_aes_internal_decrypt,
 *       respectively. When setting up alternative implementations, these functions should
 *       be overridden, but the wrapper functions mbedtls_aes_decrypt and mbedtls_aes_encrypt
 *       must stay untouched.
 *
 * \note If you use the AES_xxx_ALT macros, then it is recommended to also set
 *       MBEDTLS_AES_ROM_TABLES in order to help the linker garbage-collect the AES
 *       tables.
 *
 * Uncomment a macro to enable alternate implementation of the corresponding
 * function.
 *
 * \warning   MD2, MD4, MD5, DES and SHA-1 are considered weak and their use
 *            constitutes a security risk. If possible, we recommend avoiding
 *            dependencies on them, and considering stronger message digests
 *            and ciphers instead.
 *
 * \warning   If both MBEDTLS_ECDSA_SIGN_ALT and MBEDTLS_ECDSA_DETERMINISTIC are
 *            enabled, then the deterministic ECDH signature functions pass the
 *            the static HMAC-DRBG as RNG to mbedtls_ecdsa_sign(). Therefore
 *            alternative implementations should use the RNG only for generating
 *            the ephemeral key and nothing else. If this is not possible, then
 *            MBEDTLS_ECDSA_DETERMINISTIC should be disabled and an alternative
 *            implementation should be provided for mbedtls_ecdsa_sign_det_ext()
 *            (and for mbedtls_ecdsa_sign_det() too if backward compatibility is
 *            desirable).
 *
 */
//#define MBEDTLS_MD2_PROCESS_ALT
//#define MBEDTLS_MD4_PROCESS_ALT
//#define MBEDTLS_MD5_PROCESS_ALT
//#define MBEDTLS_RIPEMD160_PROCESS_ALT
//#define MBEDTLS_SHA1_PROCESS_ALT
//#define MBEDTLS_SHA256_PROCESS_ALT
//#define MBEDTLS_SHA512_PROCESS_ALT
//#define MBEDTLS_DES_SETKEY_ALT
//#define MBEDTLS_DES_CRYPT_ECB_ALT
//#define MBEDTLS_DES3_CRYPT_ECB_ALT
//#define MBEDTLS_AES_SETKEY_ENC_ALT
//#define MBEDTLS_AES_SETKEY_DEC_ALT
//#define MBEDTLS_AES_ENCRYPT_ALT
//#define MBEDTLS_AES_DECRYPT_ALT
//#define MBEDTLS_ECDH_GEN_PUBLIC_ALT
//#define MBEDTLS_ECDH_COMPUTE_SHARED_ALT
//#define MBEDTLS_ECDSA_VERIFY_ALT
//#define MBEDTLS_ECDSA_SIGN_ALT
//#define MBEDTLS_ECDSA_GENKEY_ALT

/**
 * \def MBEDTLS_ECP_INTERNAL_ALT
 *
 * Expose a part of the internal interface of the Elliptic Curve Point module.
 *
 * MBEDTLS_ECP__FUNCTION_NAME__ALT: Uncomment a macro to let mbed TLS use your
 * alternative core implementation of elliptic curve arithmetic. Keep in mind
 * that function prototypes should remain the same.
 *
 * This partially replaces one function. The header file from mbed TLS is still
 * used, in contrast to the MBEDTLS_ECP_ALT flag. The original implementation
 * is still present and it is used for group structures not supported by the
 * alternative.
 *
 * The original implementation can in addition be removed by setting the
 * MBEDTLS_ECP_NO_FALLBACK option, in which case any function for which the
 * corresponding MBEDTLS_ECP__FUNCTION_NAME__ALT macro is defined will not be
 * able to fallback to curves not supported by the alternative implementation.
 *
 * Any of these options become available by defining MBEDTLS_ECP_INTERNAL_ALT
 * and implementing the following functions:
 *      unsigned char mbedtls_internal_ecp_grp_capable(
 *          const mbedtls_ecp_group *grp )
 *      int  mbedtls_internal_ecp_init( const mbedtls_ecp_group *grp )
 *      void mbedtls_internal_ecp_free( const mbedtls_ecp_group *grp )
 * The mbedtls_internal_ecp_grp_capable function should return 1 if the
 * replacement functions implement arithmetic for the given group and 0
 * otherwise.
 * The functions mbedtls_internal_ecp_init and mbedtls_internal_ecp_free are
 * called before and after each point operation and provide an opportunity to
 * implement optimized set up and tear down instructions.
 *
 * Example: In case you set MBEDTLS_ECP_INTERNAL_ALT and
 * MBEDTLS_ECP_DOUBLE_JAC_ALT, mbed TLS will still provide the ecp_double_jac()
 * function, but will use your mbedtls_internal_ecp_double_jac() if the group
 * for the operation is supported by your implementation (i.e. your
 * mbedtls_internal_ecp_grp_capable() function returns 1 for this group). If the
 * group is not supported by your implementation, then the original mbed TLS
 * implementation of ecp_double_jac() is used instead, unless this fallback
 * behaviour is disabled by setting MBEDTLS_ECP_NO_FALLBACK (in which case
 * ecp_double_jac() will return MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE).
 *
 * The function prototypes and the definition of mbedtls_ecp_group and
 * mbedtls_ecp_point will not change based on MBEDTLS_ECP_INTERNAL_ALT, so your
 * implementation of mbedtls_internal_ecp__function_name__ must be compatible
 * with their definitions.
 *
 * Uncomment a macro to enable alternate implementation of the corresponding
 * function.
 */
/* Required for all the functions in this section */
//#define MBEDTLS_ECP_INTERNAL_ALT
/* Turn off software fallback for curves not supported in hardware */
//#define MBEDTLS_ECP_NO_FALLBACK
/* Support for Weierstrass curves with Jacobi representation */
//#define MBEDTLS_ECP_RANDOMIZE_JAC_ALT
//#define MBEDTLS_ECP_ADD_MIXED_ALT
//#define MBEDTLS_ECP_DOUBLE_JAC_ALT
//#define MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT
//#define MBEDTLS_ECP_NORMALIZE_JAC_ALT
/* Support for curves with Montgomery arithmetic */
//#define MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT
//#define MBEDTLS_ECP_RANDOMIZE_MXZ_ALT
//#define MBEDTLS_ECP_NORMALIZE_MXZ_ALT

/**
 * \def MBEDTLS_TEST_NULL_ENTROPY
 *
 * Enables testing and use of mbed TLS without any configured entropy sources.
 * This permits use of the library on platforms before an entropy source has
 * been integrated (see for example the MBEDTLS_ENTROPY_HARDWARE_ALT or the
 * MBEDTLS_ENTROPY_NV_SEED switches).
 *
 * WARNING! This switch MUST be disabled in production builds, and is suitable
 * only for development.
 * Enabling the switch negates any security provided by the library.
 *
 * Requires MBEDTLS_ENTROPY_C, MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
 *
 */
//#define MBEDTLS_TEST_NULL_ENTROPY

/**
 * \def MBEDTLS_ENTROPY_HARDWARE_ALT
 *
 * Uncomment this macro to let mbed TLS use your own implementation of a
 * hardware entropy collector.
 *
 * Your function must be called \c mbedtls_hardware_poll(), have the same
 * prototype as declared in entropy_poll.h, and accept NULL as first argument.
 *
 * Uncomment to use your own hardware entropy collector.
 */
//#define MBEDTLS_ENTROPY_HARDWARE_ALT

/**
 * \def MBEDTLS_AES_ROM_TABLES
 *
 * Use precomputed AES tables stored in ROM.
 *
 * Uncomment this macro to use precomputed AES tables stored in ROM.
 * Comment this macro to generate AES tables in RAM at runtime.
 *
 * Tradeoff: Using precomputed ROM tables reduces RAM usage by ~8kb
 * (or ~2kb if \c MBEDTLS_AES_FEWER_TABLES is used) and reduces the
 * initialization time before the first AES operation can be performed.
 * It comes at the cost of additional ~8kb ROM use (resp. ~2kb if \c
 * MBEDTLS_AES_FEWER_TABLES below is used), and potentially degraded
 * performance if ROM access is slower than RAM access.
 *
 * This option is independent of \c MBEDTLS_AES_FEWER_TABLES.
 *
 */
//#define MBEDTLS_AES_ROM_TABLES

/**
 * \def MBEDTLS_AES_FEWER_TABLES
 *
 * Use less ROM/RAM for AES tables.
 *
 * Uncommenting this macro omits 75% of the AES tables from
 * ROM / RAM (depending on the value of \c MBEDTLS_AES_ROM_TABLES)
 * by computing their values on the fly during operations
 * (the tables are entry-wise rotations of one another).
 *
 * Tradeoff: Uncommenting this reduces the RAM / ROM footprint
 * by ~6kb but at the cost of more arithmetic operations during
 * runtime. Specifically, one has to compare 4 accesses within
 * different tables to 4 accesses with additional arithmetic
 * operations within the same table. The performance gain/loss
 * depends on the system and memory details.
 *
 * This option is independent of \c MBEDTLS_AES_ROM_TABLES.
 *
 */
//#define MBEDTLS_AES_FEWER_TABLES

/**
 * \def MBEDTLS_CAMELLIA_SMALL_MEMORY
 *
 * Use less ROM for the Camellia implementation (saves about 768 bytes).
 *
 * Uncomment this macro to use less memory for Camellia.
 */
//#define MBEDTLS_CAMELLIA_SMALL_MEMORY

/**
 * \def MBEDTLS_CHECK_RETURN_WARNING
 *
 * If this macro is defined, emit a compile-time warning if application code
 * calls a function without checking its return value, but the return value
 * should generally be checked in portable applications.
 *
 * This is only supported on platforms where #MBEDTLS_CHECK_RETURN is
 * implemented. Otherwise this option has no effect.
 *
 * Uncomment to get warnings on using fallible functions without checking
 * their return value.
 *
 * \note  This feature is a work in progress.
 *        Warnings will be added to more functions in the future.
 *
 * \note  A few functions are considered critical, and ignoring the return
 *        value of these functions will trigger a warning even if this
 *        macro is not defined. To completely disable return value check
 *        warnings, define #MBEDTLS_CHECK_RETURN with an empty expansion.
 */
//#define MBEDTLS_CHECK_RETURN_WARNING

/**
 * \def MBEDTLS_CIPHER_MODE_CBC
 *
 * Enable Cipher Block Chaining mode (CBC) for symmetric ciphers.
 */
#define MBEDTLS_CIPHER_MODE_CBC

/**
 * \def MBEDTLS_CIPHER_MODE_CFB
 *
 * Enable Cipher Feedback mode (CFB) for symmetric ciphers.
 */
#define MBEDTLS_CIPHER_MODE_CFB

/**
 * \def MBEDTLS_CIPHER_MODE_CTR
 *
 * Enable Counter Block Cipher mode (CTR) for symmetric ciphers.
 */
#define MBEDTLS_CIPHER_MODE_CTR

/**
 * \def MBEDTLS_CIPHER_MODE_OFB
 *
 * Enable Output Feedback mode (OFB) for symmetric ciphers.
 */
#define MBEDTLS_CIPHER_MODE_OFB

/**
 * \def MBEDTLS_CIPHER_MODE_XTS
 *
 * Enable Xor-encrypt-xor with ciphertext stealing mode (XTS) for AES.
 */
#define MBEDTLS_CIPHER_MODE_XTS

/**
 * \def MBEDTLS_CIPHER_NULL_CIPHER
 *
 * Enable NULL cipher.
 * Warning: Only do so when you know what you are doing. This allows for
 * encryption or channels without any security!
 *
 * Requires MBEDTLS_ENABLE_WEAK_CIPHERSUITES as well to enable
 * the following ciphersuites:
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_NULL_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_NULL_SHA
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_NULL_SHA
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_NULL_SHA
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA384
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA256
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA
 *      MBEDTLS_TLS_RSA_WITH_NULL_SHA256
 *      MBEDTLS_TLS_RSA_WITH_NULL_SHA
 *      MBEDTLS_TLS_RSA_WITH_NULL_MD5
 *      MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA
 *      MBEDTLS_TLS_PSK_WITH_NULL_SHA384
 *      MBEDTLS_TLS_PSK_WITH_NULL_SHA256
 *      MBEDTLS_TLS_PSK_WITH_NULL_SHA
 *
 * Uncomment this macro to enable the NULL cipher and ciphersuites
 */
//#define MBEDTLS_CIPHER_NULL_CIPHER

/**
 * \def MBEDTLS_CIPHER_PADDING_PKCS7
 *
 * MBEDTLS_CIPHER_PADDING_XXX: Uncomment or comment macros to add support for
 * specific padding modes in the cipher layer with cipher modes that support
 * padding (e.g. CBC)
 *
 * If you disable all padding modes, only full blocks can be used with CBC.
 *
 * Enable padding modes in the cipher layer.
 */
#define MBEDTLS_CIPHER_PADDING_PKCS7
#define MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS
#define MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN
#define MBEDTLS_CIPHER_PADDING_ZEROS

/** \def MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
 *
 * Uncomment this macro to use a 128-bit key in the CTR_DRBG module.
 * By default, CTR_DRBG uses a 256-bit key.
 */
//#define MBEDTLS_CTR_DRBG_USE_128_BIT_KEY

/**
 * \def MBEDTLS_ENABLE_WEAK_CIPHERSUITES
 *
 * Enable weak ciphersuites in SSL / TLS.
 * Warning: Only do so when you know what you are doing. This allows for
 * channels with virtually no security at all!
 *
 * This enables the following ciphersuites:
 *      MBEDTLS_TLS_RSA_WITH_DES_CBC_SHA
 *      MBEDTLS_TLS_DHE_RSA_WITH_DES_CBC_SHA
 *
 * Uncomment this macro to enable weak ciphersuites
 *
 * \warning   DES is considered a weak cipher and its use constitutes a
 *            security risk. We recommend considering stronger ciphers instead.
 */
//#define MBEDTLS_ENABLE_WEAK_CIPHERSUITES

/**
 * \def MBEDTLS_REMOVE_ARC4_CIPHERSUITES
 *
 * Remove RC4 ciphersuites by default in SSL / TLS.
 * This flag removes the ciphersuites based on RC4 from the default list as
 * returned by mbedtls_ssl_list_ciphersuites(). However, it is still possible to
 * enable (some of) them with mbedtls_ssl_conf_ciphersuites() by including them
 * explicitly.
 *
 * Uncomment this macro to remove RC4 ciphersuites by default.
 */
#define MBEDTLS_REMOVE_ARC4_CIPHERSUITES

/**
 * \def MBEDTLS_REMOVE_3DES_CIPHERSUITES
 *
 * Remove 3DES ciphersuites by default in SSL / TLS.
 * This flag removes the ciphersuites based on 3DES from the default list as
 * returned by mbedtls_ssl_list_ciphersuites(). However, it is still possible
 * to enable (some of) them with mbedtls_ssl_conf_ciphersuites() by including
 * them explicitly.
 *
 * A man-in-the-browser attacker can recover authentication tokens sent through
 * a TLS connection using a 3DES based cipher suite (see "On the Practical
 * (In-)Security of 64-bit Block Ciphers" by Karthikeyan Bhargavan and Gaëtan
 * Leurent, see https://sweet32.info/SWEET32_CCS16.pdf). If this attack falls
 * in your threat model or you are unsure, then you should keep this option
 * enabled to remove 3DES based cipher suites.
 *
 * Comment this macro to keep 3DES in the default ciphersuite list.
 */
#define MBEDTLS_REMOVE_3DES_CIPHERSUITES

/**
 * \def MBEDTLS_ECP_DP_SECP192R1_ENABLED
 *
 * MBEDTLS_ECP_XXXX_ENABLED: Enables specific curves within the Elliptic Curve
 * module.  By default all supported curves are enabled.
 *
 * Comment macros to disable the curve and functions for it
 */
/* Short Weierstrass curves (supporting ECP, ECDH, ECDSA) */
#define MBEDTLS_ECP_DP_SECP192R1_ENABLED
#define MBEDTLS_ECP_DP_SECP224R1_ENABLED
#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
#define MBEDTLS_ECP_DP_SECP384R1_ENABLED
#define MBEDTLS_ECP_DP_SECP521R1_ENABLED
#define MBEDTLS_ECP_DP_SECP192K1_ENABLED
#define MBEDTLS_ECP_DP_SECP224K1_ENABLED
#define MBEDTLS_ECP_DP_SECP256K1_ENABLED
#define MBEDTLS_ECP_DP_BP256R1_ENABLED
#define MBEDTLS_ECP_DP_BP384R1_ENABLED
#define MBEDTLS_ECP_DP_BP512R1_ENABLED
/* Montgomery curves (supporting ECP) */
#define MBEDTLS_ECP_DP_CURVE25519_ENABLED
#define MBEDTLS_ECP_DP_CURVE448_ENABLED

/**
 * \def MBEDTLS_ECP_NIST_OPTIM
 *
 * Enable specific 'modulo p' routines for each NIST prime.
 * Depending on the prime and architecture, makes operations 4 to 8 times
 * faster on the corresponding curve.
 *
 * Comment this macro to disable NIST curves optimisation.
 */
#define MBEDTLS_ECP_NIST_OPTIM

/**
 * \def MBEDTLS_ECP_NO_INTERNAL_RNG
 *
 * When this option is disabled, mbedtls_ecp_mul() will make use of an
 * internal RNG when called with a NULL \c f_rng argument, in order to protect
 * against some side-channel attacks.
 *
 * This protection introduces a dependency of the ECP module on one of the
 * DRBG modules. For very constrained implementations that don't require this
 * protection (for example, because you're only doing signature verification,
 * so not manipulating any secret, or because local/physical side-channel
 * attacks are outside your threat model), it might be desirable to get rid of
 * that dependency.
 *
 * \warning Enabling this option makes some uses of ECP vulnerable to some
 * side-channel attacks. Only enable it if you know that's not a problem for
 * your use case.
 *
 * Uncomment this macro to disable some counter-measures in ECP.
 */
//#define MBEDTLS_ECP_NO_INTERNAL_RNG

/**
 * \def MBEDTLS_ECP_RESTARTABLE
 *
 * Enable "non-blocking" ECC operations that can return early and be resumed.
 *
 * This allows various functions to pause by returning
 * #MBEDTLS_ERR_ECP_IN_PROGRESS (or, for functions in the SSL module,
 * #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) and then be called later again in
 * order to further progress and eventually complete their operation. This is
 * controlled through mbedtls_ecp_set_max_ops() which limits the maximum
 * number of ECC operations a function may perform before pausing; see
 * mbedtls_ecp_set_max_ops() for more information.
 *
 * This is useful in non-threaded environments if you want to avoid blocking
 * for too long on ECC (and, hence, X.509 or SSL/TLS) operations.
 *
 * Uncomment this macro to enable restartable ECC computations.
 *
 * \note  This option only works with the default software implementation of
 *        elliptic curve functionality. It is incompatible with
 *        MBEDTLS_ECP_ALT, MBEDTLS_ECDH_XXX_ALT, MBEDTLS_ECDSA_XXX_ALT
 *        and MBEDTLS_ECDH_LEGACY_CONTEXT.
 */
//#define MBEDTLS_ECP_RESTARTABLE

/**
 * \def MBEDTLS_ECDH_LEGACY_CONTEXT
 *
 * Use a backward compatible ECDH context.
 *
 * Mbed TLS supports two formats for ECDH contexts (#mbedtls_ecdh_context
 * defined in `ecdh.h`). For most applications, the choice of format makes
 * no difference, since all library functions can work with either format,
 * except that the new format is incompatible with MBEDTLS_ECP_RESTARTABLE.

 * The new format used when this option is disabled is smaller
 * (56 bytes on a 32-bit platform). In future versions of the library, it
 * will support alternative implementations of ECDH operations.
 * The new format is incompatible with applications that access
 * context fields directly and with restartable ECP operations.
 *
 * Define this macro if you enable MBEDTLS_ECP_RESTARTABLE or if you
 * want to access ECDH context fields directly. Otherwise you should
 * comment out this macro definition.
 *
 * This option has no effect if #MBEDTLS_ECDH_C is not enabled.
 *
 * \note This configuration option is experimental. Future versions of the
 *       library may modify the way the ECDH context layout is configured
 *       and may modify the layout of the new context type.
 */
#define MBEDTLS_ECDH_LEGACY_CONTEXT

/**
 * \def MBEDTLS_ECDSA_DETERMINISTIC
 *
 * Enable deterministic ECDSA (RFC 6979).
 * Standard ECDSA is "fragile" in the sense that lack of entropy when signing
 * may result in a compromise of the long-term signing key. This is avoided by
 * the deterministic variant.
 *
 * Requires: MBEDTLS_HMAC_DRBG_C, MBEDTLS_ECDSA_C
 *
 * Comment this macro to disable deterministic ECDSA.
 */
#define MBEDTLS_ECDSA_DETERMINISTIC

/**
 * \def MBEDTLS_KEY_EXCHANGE_PSK_ENABLED
 *
 * Enable the PSK based ciphersuite modes in SSL / TLS.
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_PSK_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_PSK_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_PSK_WITH_RC4_128_SHA
 */
#define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED
 *
 * Enable the DHE-PSK based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_DHM_C
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_RC4_128_SHA
 *
 * \warning    Using DHE constitutes a security risk as it
 *             is not possible to validate custom DH parameters.
 *             If possible, it is recommended users should consider
 *             preferring other methods of key exchange.
 *             See dhm.h for more details.
 *
 */
#define MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED
 *
 * Enable the ECDHE-PSK based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_ECDH_C
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_RC4_128_SHA
 */
#define MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED
 *
 * Enable the RSA-PSK based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_RSA_C, MBEDTLS_PKCS1_V15,
 *           MBEDTLS_X509_CRT_PARSE_C
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_RSA_PSK_WITH_RC4_128_SHA
 */
#define MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_RSA_ENABLED
 *
 * Enable the RSA-only based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_RSA_C, MBEDTLS_PKCS1_V15,
 *           MBEDTLS_X509_CRT_PARSE_C
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_RSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_RSA_WITH_RC4_128_MD5
 */
#define MBEDTLS_KEY_EXCHANGE_RSA_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED
 *
 * Enable the DHE-RSA based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_DHM_C, MBEDTLS_RSA_C, MBEDTLS_PKCS1_V15,
 *           MBEDTLS_X509_CRT_PARSE_C
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
 *      MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
 *
 * \warning    Using DHE constitutes a security risk as it
 *             is not possible to validate custom DH parameters.
 *             If possible, it is recommended users should consider
 *             preferring other methods of key exchange.
 *             See dhm.h for more details.
 *
 */
#define MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
 *
 * Enable the ECDHE-RSA based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_ECDH_C, MBEDTLS_RSA_C, MBEDTLS_PKCS1_V15,
 *           MBEDTLS_X509_CRT_PARSE_C
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_RC4_128_SHA
 */
#define MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
 *
 * Enable the ECDHE-ECDSA based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_ECDH_C, MBEDTLS_ECDSA_C, MBEDTLS_X509_CRT_PARSE_C,
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
 */
#define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED
 *
 * Enable the ECDH-ECDSA based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_ECDH_C, MBEDTLS_ECDSA_C, MBEDTLS_X509_CRT_PARSE_C
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384
 */
#define MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED
 *
 * Enable the ECDH-RSA based ciphersuite modes in SSL / TLS.
 *
 * Requires: MBEDTLS_ECDH_C, MBEDTLS_RSA_C, MBEDTLS_X509_CRT_PARSE_C
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDH_RSA_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384
 */
#define MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED

/**
 * \def MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED
 *
 * Enable the ECJPAKE based ciphersuite modes in SSL / TLS.
 *
 * \warning This is currently experimental. EC J-PAKE support is based on the
 * Thread v1.0.0 specification; incompatible changes to the specification
 * might still happen. For this reason, this is disabled by default.
 *
 * Requires: MBEDTLS_ECJPAKE_C
 *           MBEDTLS_SHA256_C
 *           MBEDTLS_ECP_DP_SECP256R1_ENABLED
 *
 * This enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECJPAKE_WITH_AES_128_CCM_8
 */
//#define MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED

/**
 * \def MBEDTLS_PK_PARSE_EC_EXTENDED
 *
 * Enhance support for reading EC keys using variants of SEC1 not allowed by
 * RFC 5915 and RFC 5480.
 *
 * Currently this means parsing the SpecifiedECDomain choice of EC
 * parameters (only known groups are supported, not arbitrary domains, to
 * avoid validation issues).
 *
 * Disable if you only need to support RFC 5915 + 5480 key formats.
 */
#define MBEDTLS_PK_PARSE_EC_EXTENDED

/**
 * \def MBEDTLS_ERROR_STRERROR_DUMMY
 *
 * Enable a dummy error function to make use of mbedtls_strerror() in
 * third party libraries easier when MBEDTLS_ERROR_C is disabled
 * (no effect when MBEDTLS_ERROR_C is enabled).
 *
 * You can safely disable this if MBEDTLS_ERROR_C is enabled, or if you're
 * not using mbedtls_strerror() or error_strerror() in your application.
 *
 * Disable if you run into name conflicts and want to really remove the
 * mbedtls_strerror()
 */
#define MBEDTLS_ERROR_STRERROR_DUMMY

/**
 * \def MBEDTLS_GENPRIME
 *
 * Enable the prime-number generation code.
 *
 * Requires: MBEDTLS_BIGNUM_C
 */
#define MBEDTLS_GENPRIME

/**
 * \def MBEDTLS_FS_IO
 *
 * Enable functions that use the filesystem.
 */
#define MBEDTLS_FS_IO

/**
 * \def MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
 *
 * Do not add default entropy sources. These are the platform specific,
 * mbedtls_timing_hardclock and HAVEGE based poll functions.
 *
 * This is useful to have more control over the added entropy sources in an
 * application.
 *
 * Uncomment this macro to prevent loading of default entropy functions.
 */
//#define MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES

/**
 * \def MBEDTLS_NO_PLATFORM_ENTROPY
 *
 * Do not use built-in platform entropy functions.
 * This is useful if your platform does not support
 * standards like the /dev/urandom or Windows CryptoAPI.
 *
 * Uncomment this macro to disable the built-in platform entropy functions.
 */
//#define MBEDTLS_NO_PLATFORM_ENTROPY

/**
 * \def MBEDTLS_ENTROPY_FORCE_SHA256
 *
 * Force the entropy accumulator to use a SHA-256 accumulator instead of the
 * default SHA-512 based one (if both are available).
 *
 * Requires: MBEDTLS_SHA256_C
 *
 * On 32-bit systems SHA-256 can be much faster than SHA-512. Use this option
 * if you have performance concerns.
 *
 * This option is only useful if both MBEDTLS_SHA256_C and
 * MBEDTLS_SHA512_C are defined. Otherwise the available hash module is used.
 */
//#define MBEDTLS_ENTROPY_FORCE_SHA256

/**
 * \def MBEDTLS_ENTROPY_NV_SEED
 *
 * Enable the non-volatile (NV) seed file-based entropy source.
 * (Also enables the NV seed read/write functions in the platform layer)
 *
 * This is crucial (if not required) on systems that do not have a
 * cryptographic entropy source (in hardware or kernel) available.
 *
 * Requires: MBEDTLS_ENTROPY_C, MBEDTLS_PLATFORM_C
 *
 * \note The read/write functions that are used by the entropy source are
 *       determined in the platform layer, and can be modified at runtime and/or
 *       compile-time depending on the flags (MBEDTLS_PLATFORM_NV_SEED_*) used.
 *
 * \note If you use the default implementation functions that read a seedfile
 *       with regular fopen(), please make sure you make a seedfile with the
 *       proper name (defined in MBEDTLS_PLATFORM_STD_NV_SEED_FILE) and at
 *       least MBEDTLS_ENTROPY_BLOCK_SIZE bytes in size that can be read from
 *       and written to or you will get an entropy source error! The default
 *       implementation will only use the first MBEDTLS_ENTROPY_BLOCK_SIZE
 *       bytes from the file.
 *
 * \note The entropy collector will write to the seed file before entropy is
 *       given to an external source, to update it.
 */
//#define MBEDTLS_ENTROPY_NV_SEED

/* MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER
 *
 * Enable key identifiers that encode a key owner identifier.
 *
 * The owner of a key is identified by a value of type ::mbedtls_key_owner_id_t
 * which is currently hard-coded to be int32_t.
 *
 * Note that this option is meant for internal use only and may be removed
 * without notice. It is incompatible with MBEDTLS_USE_PSA_CRYPTO.
 */
//#define MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER

/**
 * \def MBEDTLS_MEMORY_DEBUG
 *
 * Enable debugging of buffer allocator memory issues. Automatically prints
 * (to stderr) all (fatal) messages on memory allocation issues. Enables
 * function for 'debug output' of allocated memory.
 *
 * Requires: MBEDTLS_MEMORY_BUFFER_ALLOC_C
 *
 * Uncomment this macro to let the buffer allocator print out error messages.
 */
//#define MBEDTLS_MEMORY_DEBUG

/**
 * \def MBEDTLS_MEMORY_BACKTRACE
 *
 * Include backtrace information with each allocated block.
 *
 * Requires: MBEDTLS_MEMORY_BUFFER_ALLOC_C
 *           GLIBC-compatible backtrace() an backtrace_symbols() support
 *
 * Uncomment this macro to include backtrace information
 */
//#define MBEDTLS_MEMORY_BACKTRACE

/**
 * \def MBEDTLS_PK_RSA_ALT_SUPPORT
 *
 * Support external private RSA keys (eg from a HSM) in the PK layer.
 *
 * Comment this macro to disable support for external private RSA keys.
 */
#define MBEDTLS_PK_RSA_ALT_SUPPORT

/**
 * \def MBEDTLS_PKCS1_V15
 *
 * Enable support for PKCS#1 v1.5 encoding.
 *
 * Requires: MBEDTLS_RSA_C
 *
 * This enables support for PKCS#1 v1.5 operations.
 */
#define MBEDTLS_PKCS1_V15

/**
 * \def MBEDTLS_PKCS1_V21
 *
 * Enable support for PKCS#1 v2.1 encoding.
 *
 * Requires: MBEDTLS_MD_C, MBEDTLS_RSA_C
 *
 * This enables support for RSAES-OAEP and RSASSA-PSS operations.
 */
#define MBEDTLS_PKCS1_V21

/** \def MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS
 *
 * Enable support for platform built-in keys. If you enable this feature,
 * you must implement the function mbedtls_psa_platform_get_builtin_key().
 * See the documentation of that function for more information.
 *
 * Built-in keys are typically derived from a hardware unique key or
 * stored in a secure element.
 *
 * Requires: MBEDTLS_PSA_CRYPTO_C.
 *
 * \warning This interface is experimental and may change or be removed
 * without notice.
 */
//#define MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS

/** \def MBEDTLS_PSA_CRYPTO_CLIENT
 *
 * Enable support for PSA crypto client.
 *
 * \note This option allows to include the code necessary for a PSA
 *       crypto client when the PSA crypto implementation is not included in
 *       the library (MBEDTLS_PSA_CRYPTO_C disabled). The code included is the
 *       code to set and get PSA key attributes.
 *       The development of PSA drivers partially relying on the library to
 *       fulfill the hardware gaps is another possible usage of this option.
 *
 * \warning This interface is experimental and may change or be removed
 * without notice.
 */
//#define MBEDTLS_PSA_CRYPTO_CLIENT

/** \def MBEDTLS_PSA_CRYPTO_DRIVERS
 *
 * Enable support for the experimental PSA crypto driver interface.
 *
 * Requires: MBEDTLS_PSA_CRYPTO_C
 *
 * \warning This interface is experimental and may change or be removed
 * without notice.
 */
//#define MBEDTLS_PSA_CRYPTO_DRIVERS

/** \def MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG
 *
 * Make the PSA Crypto module use an external random generator provided
 * by a driver, instead of Mbed TLS's entropy and DRBG modules.
 *
 * \note This random generator must deliver random numbers with cryptographic
 *       quality and high performance. It must supply unpredictable numbers
 *       with a uniform distribution. The implementation of this function
 *       is responsible for ensuring that the random generator is seeded
 *       with sufficient entropy. If you have a hardware TRNG which is slow
 *       or delivers non-uniform output, declare it as an entropy source
 *       with mbedtls_entropy_add_source() instead of enabling this option.
 *
 * If you enable this option, you must configure the type
 * ::mbedtls_psa_external_random_context_t in psa/crypto_platform.h
 * and define a function called mbedtls_psa_external_get_random()
 * with the following prototype:
 * ```
 * psa_status_t mbedtls_psa_external_get_random(
 *     mbedtls_psa_external_random_context_t *context,
 *     uint8_t *output, size_t output_size, size_t *output_length);
 * );
 * ```
 * The \c context value is initialized to 0 before the first call.
 * The function must fill the \c output buffer with \p output_size bytes
 * of random data and set \c *output_length to \p output_size.
 *
 * Requires: MBEDTLS_PSA_CRYPTO_C
 *
 * \warning If you enable this option, code that uses the PSA cryptography
 *          interface will not use any of the entropy sources set up for
 *          the entropy module, nor the NV seed that MBEDTLS_ENTROPY_NV_SEED
 *          enables.
 *
 * \note This option is experimental and may be removed without notice.
 */
//#define MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG

/**
 * \def MBEDTLS_PSA_CRYPTO_SPM
 *
 * When MBEDTLS_PSA_CRYPTO_SPM is defined, the code is built for SPM (Secure
 * Partition Manager) integration which separates the code into two parts: a
 * NSPE (Non-Secure Process Environment) and an SPE (Secure Process
 * Environment).
 *
 * Module:  library/psa_crypto.c
 * Requires: MBEDTLS_PSA_CRYPTO_C
 *
 */
//#define MBEDTLS_PSA_CRYPTO_SPM

/**
 * \def MBEDTLS_PSA_INJECT_ENTROPY
 *
 * Enable support for entropy injection at first boot. This feature is
 * required on systems that do not have a built-in entropy source (TRNG).
 * This feature is currently not supported on systems that have a built-in
 * entropy source.
 *
 * Requires: MBEDTLS_PSA_CRYPTO_STORAGE_C, MBEDTLS_ENTROPY_NV_SEED
 *
 */
//#define MBEDTLS_PSA_INJECT_ENTROPY

/**
 * \def MBEDTLS_RSA_NO_CRT
 *
 * Do not use the Chinese Remainder Theorem
 * for the RSA private operation.
 *
 * Uncomment this macro to disable the use of CRT in RSA.
 *
 */
//#define MBEDTLS_RSA_NO_CRT

/**
 * \def MBEDTLS_SELF_TEST
 *
 * Enable the checkup functions (*_self_test).
 */
#define MBEDTLS_SELF_TEST

/**
 * \def MBEDTLS_SHA256_SMALLER
 *
 * Enable an implementation of SHA-256 that has lower ROM footprint but also
 * lower performance.
 *
 * The default implementation is meant to be a reasonnable compromise between
 * performance and size. This version optimizes more aggressively for size at
 * the expense of performance. Eg on Cortex-M4 it reduces the size of
 * mbedtls_sha256_process() from ~2KB to ~0.5KB for a performance hit of about
 * 30%.
 *
 * Uncomment to enable the smaller implementation of SHA256.
 */
//#define MBEDTLS_SHA256_SMALLER

/**
 * \def MBEDTLS_SHA512_SMALLER
 *
 * Enable an implementation of SHA-512 that has lower ROM footprint but also
 * lower performance.
 *
 * Uncomment to enable the smaller implementation of SHA512.
 */
//#define MBEDTLS_SHA512_SMALLER

/**
 * \def MBEDTLS_SHA512_NO_SHA384
 *
 * Disable the SHA-384 option of the SHA-512 module. Use this to save some
 * code size on devices that don't use SHA-384.
 *
 * Requires: MBEDTLS_SHA512_C
 *
 * Uncomment to disable SHA-384
 */
//#define MBEDTLS_SHA512_NO_SHA384

/**
 * \def MBEDTLS_SSL_ALL_ALERT_MESSAGES
 *
 * Enable sending of alert messages in case of encountered errors as per RFC.
 * If you choose not to send the alert messages, mbed TLS can still communicate
 * with other servers, only debugging of failures is harder.
 *
 * The advantage of not sending alert messages, is that no information is given
 * about reasons for failures thus preventing adversaries of gaining intel.
 *
 * Enable sending of all alert messages
 */
#define MBEDTLS_SSL_ALL_ALERT_MESSAGES

/**
 * \def MBEDTLS_SSL_RECORD_CHECKING
 *
 * Enable the function mbedtls_ssl_check_record() which can be used to check
 * the validity and authenticity of an incoming record, to verify that it has
 * not been seen before. These checks are performed without modifying the
 * externally visible state of the SSL context.
 *
 * See mbedtls_ssl_check_record() for more information.
 *
 * Uncomment to enable support for record checking.
 */
#define MBEDTLS_SSL_RECORD_CHECKING

/**
 * \def MBEDTLS_SSL_DTLS_CONNECTION_ID
 *
 * Enable support for the DTLS Connection ID extension
 * (version draft-ietf-tls-dtls-connection-id-05,
 * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05)
 * which allows to identify DTLS connections across changes
 * in the underlying transport.
 *
 * Setting this option enables the SSL APIs `mbedtls_ssl_set_cid()`,
 * `mbedtls_ssl_get_peer_cid()` and `mbedtls_ssl_conf_cid()`.
 * See the corresponding documentation for more information.
 *
 * \warning The Connection ID extension is still in draft state.
 *          We make no stability promises for the availability
 *          or the shape of the API controlled by this option.
 *
 * The maximum lengths of outgoing and incoming CIDs can be configured
 * through the options
 * - MBEDTLS_SSL_CID_OUT_LEN_MAX
 * - MBEDTLS_SSL_CID_IN_LEN_MAX.
 *
 * Requires: MBEDTLS_SSL_PROTO_DTLS
 *
 * Uncomment to enable the Connection ID extension.
 */
//#define MBEDTLS_SSL_DTLS_CONNECTION_ID

/**
 * \def MBEDTLS_SSL_ASYNC_PRIVATE
 *
 * Enable asynchronous external private key operations in SSL. This allows
 * you to configure an SSL connection to call an external cryptographic
 * module to perform private key operations instead of performing the
 * operation inside the library.
 *
 */
//#define MBEDTLS_SSL_ASYNC_PRIVATE

/**
 * \def MBEDTLS_SSL_CONTEXT_SERIALIZATION
 *
 * Enable serialization of the TLS context structures, through use of the
 * functions mbedtls_ssl_context_save() and mbedtls_ssl_context_load().
 *
 * This pair of functions allows one side of a connection to serialize the
 * context associated with the connection, then free or re-use that context
 * while the serialized state is persisted elsewhere, and finally deserialize
 * that state to a live context for resuming read/write operations on the
 * connection. From a protocol perspective, the state of the connection is
 * unaffected, in particular this is entirely transparent to the peer.
 *
 * Note: this is distinct from TLS session resumption, which is part of the
 * protocol and fully visible by the peer. TLS session resumption enables
 * establishing new connections associated to a saved session with shorter,
 * lighter handshakes, while context serialization is a local optimization in
 * handling a single, potentially long-lived connection.
 *
 * Enabling these APIs makes some SSL structures larger, as 64 extra bytes are
 * saved after the handshake to allow for more efficient serialization, so if
 * you don't need this feature you'll save RAM by disabling it.
 *
 * Comment to disable the context serialization APIs.
 */
#define MBEDTLS_SSL_CONTEXT_SERIALIZATION

/**
 * \def MBEDTLS_SSL_DEBUG_ALL
 *
 * Enable the debug messages in SSL module for all issues.
 * Debug messages have been disabled in some places to prevent timing
 * attacks due to (unbalanced) debugging function calls.
 *
 * If you need all error reporting you should enable this during debugging,
 * but remove this for production servers that should log as well.
 *
 * Uncomment this macro to report all debug messages on errors introducing
 * a timing side-channel.
 *
 */
//#define MBEDTLS_SSL_DEBUG_ALL

/** \def MBEDTLS_SSL_ENCRYPT_THEN_MAC
 *
 * Enable support for Encrypt-then-MAC, RFC 7366.
 *
 * This allows peers that both support it to use a more robust protection for
 * ciphersuites using CBC, providing deep resistance against timing attacks
 * on the padding or underlying cipher.
 *
 * This only affects CBC ciphersuites, and is useless if none is defined.
 *
 * Requires: MBEDTLS_SSL_PROTO_TLS1    or
 *           MBEDTLS_SSL_PROTO_TLS1_1  or
 *           MBEDTLS_SSL_PROTO_TLS1_2
 *
 * Comment this macro to disable support for Encrypt-then-MAC
 */
#define MBEDTLS_SSL_ENCRYPT_THEN_MAC

/** \def MBEDTLS_SSL_EXTENDED_MASTER_SECRET
 *
 * Enable support for RFC 7627: Session Hash and Extended Master Secret
 * Extension.
 *
 * This was introduced as "the proper fix" to the Triple Handshake familiy of
 * attacks, but it is recommended to always use it (even if you disable
 * renegotiation), since it actually fixes a more fundamental issue in the
 * original SSL/TLS design, and has implications beyond Triple Handshake.
 *
 * Requires: MBEDTLS_SSL_PROTO_TLS1    or
 *           MBEDTLS_SSL_PROTO_TLS1_1  or
 *           MBEDTLS_SSL_PROTO_TLS1_2
 *
 * Comment this macro to disable support for Extended Master Secret.
 */
#define MBEDTLS_SSL_EXTENDED_MASTER_SECRET

/**
 * \def MBEDTLS_SSL_FALLBACK_SCSV
 *
 * Enable support for RFC 7507: Fallback Signaling Cipher Suite Value (SCSV)
 * for Preventing Protocol Downgrade Attacks.
 *
 * For servers, it is recommended to always enable this, unless you support
 * only one version of TLS, or know for sure that none of your clients
 * implements a fallback strategy.
 *
 * For clients, you only need this if you're using a fallback strategy, which
 * is not recommended in the first place, unless you absolutely need it to
 * interoperate with buggy (version-intolerant) servers.
 *
 * Comment this macro to disable support for FALLBACK_SCSV
 */
#define MBEDTLS_SSL_FALLBACK_SCSV

/**
 * \def MBEDTLS_SSL_KEEP_PEER_CERTIFICATE
 *
 * This option controls the availability of the API mbedtls_ssl_get_peer_cert()
 * giving access to the peer's certificate after completion of the handshake.
 *
 * Unless you need mbedtls_ssl_peer_cert() in your application, it is
 * recommended to disable this option for reduced RAM usage.
 *
 * \note If this option is disabled, mbedtls_ssl_get_peer_cert() is still
 *       defined, but always returns \c NULL.
 *
 * \note This option has no influence on the protection against the
 *       triple handshake attack. Even if it is disabled, Mbed TLS will
 *       still ensure that certificates do not change during renegotiation,
 *       for exaple by keeping a hash of the peer's certificate.
 *
 * Comment this macro to disable storing the peer's certificate
 * after the handshake.
 */
#define MBEDTLS_SSL_KEEP_PEER_CERTIFICATE

/**
 * \def MBEDTLS_SSL_HW_RECORD_ACCEL
 *
 * Enable hooking functions in SSL module for hardware acceleration of
 * individual records.
 *
 * \deprecated This option is deprecated and will be removed in a future
 *             version of Mbed TLS.
 *
 * Uncomment this macro to enable hooking functions.
 */
//#define MBEDTLS_SSL_HW_RECORD_ACCEL

/**
 * \def MBEDTLS_SSL_CBC_RECORD_SPLITTING
 *
 * Enable 1/n-1 record splitting for CBC mode in SSLv3 and TLS 1.0.
 *
 * This is a countermeasure to the BEAST attack, which also minimizes the risk
 * of interoperability issues compared to sending 0-length records.
 *
 * Comment this macro to disable 1/n-1 record splitting.
 */
#define MBEDTLS_SSL_CBC_RECORD_SPLITTING

/**
 * \def MBEDTLS_SSL_RENEGOTIATION
 *
 * Enable support for TLS renegotiation.
 *
 * The two main uses of renegotiation are (1) refresh keys on long-lived
 * connections and (2) client authentication after the initial handshake.
 * If you don't need renegotiation, it's probably better to disable it, since
 * it has been associated with security issues in the past and is easy to
 * misuse/misunderstand.
 *
 * Comment this to disable support for renegotiation.
 *
 * \note   Even if this option is disabled, both client and server are aware
 *         of the Renegotiation Indication Extension (RFC 5746) used to
 *         prevent the SSL renegotiation attack (see RFC 5746 Sect. 1).
 *         (See \c mbedtls_ssl_conf_legacy_renegotiation for the
 *          configuration of this extension).
 *
 */
#define MBEDTLS_SSL_RENEGOTIATION

/**
 * \def MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO
 *
 * Enable support for receiving and parsing SSLv2 Client Hello messages for the
 * SSL Server module (MBEDTLS_SSL_SRV_C).
 *
 * \deprecated This option is deprecated and will be removed in a future
 *             version of Mbed TLS.
 *
 * Uncomment this macro to enable support for SSLv2 Client Hello messages.
 */
//#define MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO

/**
 * \def MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE
 *
 * Pick the ciphersuite according to the client's preferences rather than ours
 * in the SSL Server module (MBEDTLS_SSL_SRV_C).
 *
 * Uncomment this macro to respect client's ciphersuite order
 */
//#define MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE

/**
 * \def MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
 *
 * Enable support for RFC 6066 max_fragment_length extension in SSL.
 *
 * Comment this macro to disable support for the max_fragment_length extension
 */
#define MBEDTLS_SSL_MAX_FRAGMENT_LENGTH

/**
 * \def MBEDTLS_SSL_PROTO_SSL3
 *
 * Enable support for SSL 3.0.
 *
 * Requires: MBEDTLS_MD5_C
 *           MBEDTLS_SHA1_C
 *
 * \deprecated This option is deprecated and will be removed in a future
 *             version of Mbed TLS.
 *
 * Comment this macro to disable support for SSL 3.0
 */
//#define MBEDTLS_SSL_PROTO_SSL3

/**
 * \def MBEDTLS_SSL_PROTO_TLS1
 *
 * Enable support for TLS 1.0.
 *
 * Requires: MBEDTLS_MD5_C
 *           MBEDTLS_SHA1_C
 *
 * Comment this macro to disable support for TLS 1.0
 */
#define MBEDTLS_SSL_PROTO_TLS1

/**
 * \def MBEDTLS_SSL_PROTO_TLS1_1
 *
 * Enable support for TLS 1.1 (and DTLS 1.0 if DTLS is enabled).
 *
 * Requires: MBEDTLS_MD5_C
 *           MBEDTLS_SHA1_C
 *
 * Comment this macro to disable support for TLS 1.1 / DTLS 1.0
 */
#define MBEDTLS_SSL_PROTO_TLS1_1

/**
 * \def MBEDTLS_SSL_PROTO_TLS1_2
 *
 * Enable support for TLS 1.2 (and DTLS 1.2 if DTLS is enabled).
 *
 * Requires: MBEDTLS_SHA1_C or MBEDTLS_SHA256_C or MBEDTLS_SHA512_C
 *           (Depends on ciphersuites)
 *
 * Comment this macro to disable support for TLS 1.2 / DTLS 1.2
 */
#define MBEDTLS_SSL_PROTO_TLS1_2

/**
 * \def MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL
 *
 * This macro is used to selectively enable experimental parts
 * of the code that contribute to the ongoing development of
 * the prototype TLS 1.3 and DTLS 1.3 implementation, and provide
 * no other purpose.
 *
 * \warning TLS 1.3 and DTLS 1.3 aren't yet supported in Mbed TLS,
 *          and no feature exposed through this macro is part of the
 *          public API. In particular, features under the control
 *          of this macro are experimental and don't come with any
 *          stability guarantees.
 *
 * Uncomment this macro to enable experimental and partial
 * functionality specific to TLS 1.3.
 */
//#define MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL

/**
 * \def MBEDTLS_SSL_PROTO_DTLS
 *
 * Enable support for DTLS (all available versions).
 *
 * Enable this and MBEDTLS_SSL_PROTO_TLS1_1 to enable DTLS 1.0,
 * and/or this and MBEDTLS_SSL_PROTO_TLS1_2 to enable DTLS 1.2.
 *
 * Requires: MBEDTLS_SSL_PROTO_TLS1_1
 *        or MBEDTLS_SSL_PROTO_TLS1_2
 *
 * Comment this macro to disable support for DTLS
 */
#define MBEDTLS_SSL_PROTO_DTLS

/**
 * \def MBEDTLS_SSL_ALPN
 *
 * Enable support for RFC 7301 Application Layer Protocol Negotiation.
 *
 * Comment this macro to disable support for ALPN.
 */
#define MBEDTLS_SSL_ALPN

/**
 * \def MBEDTLS_SSL_DTLS_ANTI_REPLAY
 *
 * Enable support for the anti-replay mechanism in DTLS.
 *
 * Requires: MBEDTLS_SSL_TLS_C
 *           MBEDTLS_SSL_PROTO_DTLS
 *
 * \warning Disabling this is often a security risk!
 * See mbedtls_ssl_conf_dtls_anti_replay() for details.
 *
 * Comment this to disable anti-replay in DTLS.
 */
#define MBEDTLS_SSL_DTLS_ANTI_REPLAY

/**
 * \def MBEDTLS_SSL_DTLS_HELLO_VERIFY
 *
 * Enable support for HelloVerifyRequest on DTLS servers.
 *
 * This feature is highly recommended to prevent DTLS servers being used as
 * amplifiers in DoS attacks against other hosts. It should always be enabled
 * unless you know for sure amplification cannot be a problem in the
 * environment in which your server operates.
 *
 * \warning Disabling this can ba a security risk! (see above)
 *
 * Requires: MBEDTLS_SSL_PROTO_DTLS
 *
 * Comment this to disable support for HelloVerifyRequest.
 */
#define MBEDTLS_SSL_DTLS_HELLO_VERIFY

/**
 * \def MBEDTLS_SSL_DTLS_SRTP
 *
 * Enable support for negotiation of DTLS-SRTP (RFC 5764)
 * through the use_srtp extension.
 *
 * \note This feature provides the minimum functionality required
 * to negotiate the use of DTLS-SRTP and to allow the derivation of
 * the associated SRTP packet protection key material.
 * In particular, the SRTP packet protection itself, as well as the
 * demultiplexing of RTP and DTLS packets at the datagram layer
 * (see Section 5 of RFC 5764), are not handled by this feature.
 * Instead, after successful completion of a handshake negotiating
 * the use of DTLS-SRTP, the extended key exporter API
 * mbedtls_ssl_conf_export_keys_ext_cb() should be used to implement
 * the key exporter described in Section 4.2 of RFC 5764 and RFC 5705
 * (this is implemented in the SSL example programs).
 * The resulting key should then be passed to an SRTP stack.
 *
 * Setting this option enables the runtime API
 * mbedtls_ssl_conf_dtls_srtp_protection_profiles()
 * through which the supported DTLS-SRTP protection
 * profiles can be configured. You must call this API at
 * runtime if you wish to negotiate the use of DTLS-SRTP.
 *
 * Requires: MBEDTLS_SSL_PROTO_DTLS
 *
 * Uncomment this to enable support for use_srtp extension.
 */
//#define MBEDTLS_SSL_DTLS_SRTP

/**
 * \def MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE
 *
 * Enable server-side support for clients that reconnect from the same port.
 *
 * Some clients unexpectedly close the connection and try to reconnect using the
 * same source port. This needs special support from the server to handle the
 * new connection securely, as described in section 4.2.8 of RFC 6347. This
 * flag enables that support.
 *
 * Requires: MBEDTLS_SSL_DTLS_HELLO_VERIFY
 *
 * Comment this to disable support for clients reusing the source port.
 */
#define MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE

/**
 * \def MBEDTLS_SSL_DTLS_BADMAC_LIMIT
 *
 * Enable support for a limit of records with bad MAC.
 *
 * See mbedtls_ssl_conf_dtls_badmac_limit().
 *
 * Requires: MBEDTLS_SSL_PROTO_DTLS
 */
#define MBEDTLS_SSL_DTLS_BADMAC_LIMIT

/**
 * \def MBEDTLS_SSL_SESSION_TICKETS
 *
 * Enable support for RFC 5077 session tickets in SSL.
 * Client-side, provides full support for session tickets (maintenance of a
 * session store remains the responsibility of the application, though).
 * Server-side, you also need to provide callbacks for writing and parsing
 * tickets, including authenticated encryption and key management. Example
 * callbacks are provided by MBEDTLS_SSL_TICKET_C.
 *
 * Comment this macro to disable support for SSL session tickets
 */
#define MBEDTLS_SSL_SESSION_TICKETS

/**
 * \def MBEDTLS_SSL_EXPORT_KEYS
 *
 * Enable support for exporting key block and master secret.
 * This is required for certain users of TLS, e.g. EAP-TLS.
 *
 * Comment this macro to disable support for key export
 */
#define MBEDTLS_SSL_EXPORT_KEYS

/**
 * \def MBEDTLS_SSL_SERVER_NAME_INDICATION
 *
 * Enable support for RFC 6066 server name indication (SNI) in SSL.
 *
 * Requires: MBEDTLS_X509_CRT_PARSE_C
 *
 * Comment this macro to disable support for server name indication in SSL
 */
#define MBEDTLS_SSL_SERVER_NAME_INDICATION

/**
 * \def MBEDTLS_SSL_TRUNCATED_HMAC
 *
 * Enable support for RFC 6066 truncated HMAC in SSL.
 *
 * Comment this macro to disable support for truncated HMAC in SSL
 */
#define MBEDTLS_SSL_TRUNCATED_HMAC

/**
 * \def MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT
 *
 * Fallback to old (pre-2.7), non-conforming implementation of the truncated
 * HMAC extension which also truncates the HMAC key. Note that this option is
 * only meant for a transitory upgrade period and will be removed in a future
 * version of the library.
 *
 * \warning The old implementation is non-compliant and has a security weakness
 *          (2^80 brute force attack on the HMAC key used for a single,
 *          uninterrupted connection). This should only be enabled temporarily
 *          when (1) the use of truncated HMAC is essential in order to save
 *          bandwidth, and (2) the peer is an Mbed TLS stack that doesn't use
 *          the fixed implementation yet (pre-2.7).
 *
 * \deprecated This option is deprecated and will be removed in a
 *             future version of Mbed TLS.
 *
 * Uncomment to fallback to old, non-compliant truncated HMAC implementation.
 *
 * Requires: MBEDTLS_SSL_TRUNCATED_HMAC
 */
//#define MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT

/**
 * \def MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
 *
 * When this option is enabled, the SSL buffer will be resized automatically
 * based on the negotiated maximum fragment length in each direction.
 *
 * Requires: MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
 */
//#define MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH

/**
 * \def MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN
 *
 * Enable testing of the constant-flow nature of some sensitive functions with
 * clang's MemorySanitizer. This causes some existing tests to also test
 * this non-functional property of the code under test.
 *
 * This setting requires compiling with clang -fsanitize=memory. The test
 * suites can then be run normally.
 *
 * \warning This macro is only used for extended testing; it is not considered
 * part of the library's API, so it may change or disappear at any time.
 *
 * Uncomment to enable testing of the constant-flow nature of selected code.
 */
//#define MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN

/**
 * \def MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND
 *
 * Enable testing of the constant-flow nature of some sensitive functions with
 * valgrind's memcheck tool. This causes some existing tests to also test
 * this non-functional property of the code under test.
 *
 * This setting requires valgrind headers for building, and is only useful for
 * testing if the tests suites are run with valgrind's memcheck. This can be
 * done for an individual test suite with 'valgrind ./test_suite_xxx', or when
 * using CMake, this can be done for all test suites with 'make memcheck'.
 *
 * \warning This macro is only used for extended testing; it is not considered
 * part of the library's API, so it may change or disappear at any time.
 *
 * Uncomment to enable testing of the constant-flow nature of selected code.
 */
//#define MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND

/**
 * \def MBEDTLS_TEST_HOOKS
 *
 * Enable features for invasive testing such as introspection functions and
 * hooks for fault injection. This enables additional unit tests.
 *
 * Merely enabling this feature should not change the behavior of the product.
 * It only adds new code, and new branching points where the default behavior
 * is the same as when this feature is disabled.
 * However, this feature increases the attack surface: there is an added
 * risk of vulnerabilities, and more gadgets that can make exploits easier.
 * Therefore this feature must never be enabled in production.
 *
 * See `docs/architecture/testing/mbed-crypto-invasive-testing.md` for more
 * information.
 *
 * Uncomment to enable invasive tests.
 */
//#define MBEDTLS_TEST_HOOKS

/**
 * \def MBEDTLS_THREADING_ALT
 *
 * Provide your own alternate threading implementation.
 *
 * Requires: MBEDTLS_THREADING_C
 *
 * Uncomment this to allow your own alternate threading implementation.
 */
//#define MBEDTLS_THREADING_ALT

/**
 * \def MBEDTLS_THREADING_PTHREAD
 *
 * Enable the pthread wrapper layer for the threading layer.
 *
 * Requires: MBEDTLS_THREADING_C
 *
 * Uncomment this to enable pthread mutexes.
 */
//#define MBEDTLS_THREADING_PTHREAD

/**
 * \def MBEDTLS_USE_PSA_CRYPTO
 *
 * Make the X.509 and TLS library use PSA for cryptographic operations, and
 * enable new APIs for using keys handled by PSA Crypto.
 *
 * \note Development of this option is currently in progress, and parts of Mbed
 * TLS's X.509 and TLS modules are not ported to PSA yet. However, these parts
 * will still continue to work as usual, so enabling this option should not
 * break backwards compatibility.
 *
 * \note See docs/use-psa-crypto.md for a complete description of what this
 * option currently does, and of parts that are not affected by it so far.
 *
 * \warning This option enables new Mbed TLS APIs which are currently
 * considered experimental and may change in incompatible ways at any time.
 * That is, the APIs enabled by this option are not covered by the usual
 * promises of API stability.
 *
 * Requires: MBEDTLS_PSA_CRYPTO_C.
 *
 * Uncomment this to enable internal use of PSA Crypto and new associated APIs.
 */
//#define MBEDTLS_USE_PSA_CRYPTO

/**
 * \def MBEDTLS_PSA_CRYPTO_CONFIG
 *
 * This setting allows support for cryptographic mechanisms through the PSA
 * API to be configured separately from support through the mbedtls API.
 *
 * Uncomment this to enable use of PSA Crypto configuration settings which
 * can be found in include/psa/crypto_config.h.
 *
 * If you enable this option and write your own configuration file, you must
 * include mbedtls/config_psa.h in your configuration file. The default
 * provided mbedtls/config.h contains the necessary inclusion.
 *
 * This feature is still experimental and is not ready for production since
 * it is not completed.
 */
//#define MBEDTLS_PSA_CRYPTO_CONFIG

/**
 * \def MBEDTLS_VERSION_FEATURES
 *
 * Allow run-time checking of compile-time enabled features. Thus allowing users
 * to check at run-time if the library is for instance compiled with threading
 * support via mbedtls_version_check_feature().
 *
 * Requires: MBEDTLS_VERSION_C
 *
 * Comment this to disable run-time checking and save ROM space
 */
#define MBEDTLS_VERSION_FEATURES

/**
 * \def MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3
 *
 * If set, the X509 parser will not break-off when parsing an X509 certificate
 * and encountering an extension in a v1 or v2 certificate.
 *
 * Uncomment to prevent an error.
 */
//#define MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3

/**
 * \def MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
 *
 * If set, the X509 parser will not break-off when parsing an X509 certificate
 * and encountering an unknown critical extension.
 *
 * \warning Depending on your PKI use, enabling this can be a security risk!
 *
 * Uncomment to prevent an error.
 */
//#define MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION

/**
 * \def MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 *
 * If set, this enables the X.509 API `mbedtls_x509_crt_verify_with_ca_cb()`
 * and the SSL API `mbedtls_ssl_conf_ca_cb()` which allow users to configure
 * the set of trusted certificates through a callback instead of a linked
 * list.
 *
 * This is useful for example in environments where a large number of trusted
 * certificates is present and storing them in a linked list isn't efficient
 * enough, or when the set of trusted certificates changes frequently.
 *
 * See the documentation of `mbedtls_x509_crt_verify_with_ca_cb()` and
 * `mbedtls_ssl_conf_ca_cb()` for more information.
 *
 * Uncomment to enable trusted certificate callbacks.
 */
//#define MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK

/**
 * \def MBEDTLS_X509_CHECK_KEY_USAGE
 *
 * Enable verification of the keyUsage extension (CA and leaf certificates).
 *
 * Disabling this avoids problems with mis-issued and/or misused
 * (intermediate) CA and leaf certificates.
 *
 * \warning Depending on your PKI use, disabling this can be a security risk!
 *
 * Comment to skip keyUsage checking for both CA and leaf certificates.
 */
#define MBEDTLS_X509_CHECK_KEY_USAGE

/**
 * \def MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
 *
 * Enable verification of the extendedKeyUsage extension (leaf certificates).
 *
 * Disabling this avoids problems with mis-issued and/or misused certificates.
 *
 * \warning Depending on your PKI use, disabling this can be a security risk!
 *
 * Comment to skip extendedKeyUsage checking for certificates.
 */
#define MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE

/**
 * \def MBEDTLS_X509_RSASSA_PSS_SUPPORT
 *
 * Enable parsing and verification of X.509 certificates, CRLs and CSRS
 * signed with RSASSA-PSS (aka PKCS#1 v2.1).
 *
 * Comment this macro to disallow using RSASSA-PSS in certificates.
 */
#define MBEDTLS_X509_RSASSA_PSS_SUPPORT

/**
 * \def MBEDTLS_ZLIB_SUPPORT
 *
 * If set, the SSL/TLS module uses ZLIB to support compression and
 * decompression of packet data.
 *
 * \warning TLS-level compression MAY REDUCE SECURITY! See for example the
 * CRIME attack. Before enabling this option, you should examine with care if
 * CRIME or similar exploits may be applicable to your use case.
 *
 * \note Currently compression can't be used with DTLS.
 *
 * \deprecated This feature is deprecated and will be removed
 *             in the next major revision of the library.
 *
 * Used in: library/ssl_tls.c
 *          library/ssl_cli.c
 *          library/ssl_srv.c
 *
 * This feature requires zlib library and headers to be present.
 *
 * Uncomment to enable use of ZLIB
 */
//#define MBEDTLS_ZLIB_SUPPORT
/* \} name SECTION: mbed TLS feature support */

/**
 * \name SECTION: mbed TLS modules
 *
 * This section enables or disables entire modules in mbed TLS
 * \{
 */

/**
 * \def MBEDTLS_AESNI_C
 *
 * Enable AES-NI support on x86-64.
 *
 * Module:  library/aesni.c
 * Caller:  library/aes.c
 *
 * Requires: MBEDTLS_HAVE_ASM
 *
 * This modules adds support for the AES-NI instructions on x86-64
 */
#define MBEDTLS_AESNI_C

/**
 * \def MBEDTLS_AES_C
 *
 * Enable the AES block cipher.
 *
 * Module:  library/aes.c
 * Caller:  library/cipher.c
 *          library/pem.c
 *          library/ctr_drbg.c
 *
 * This module enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA
 *      MBEDTLS_TLS_PSK_WITH_AES_256_GCM_SHA384
 *      MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA384
 *      MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA
 *      MBEDTLS_TLS_PSK_WITH_AES_128_GCM_SHA256
 *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA256
 *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA
 *
 * PEM_PARSE uses AES for decrypting encrypted keys.
 */
#define MBEDTLS_AES_C

/**
 * \def MBEDTLS_ARC4_C
 *
 * Enable the ARCFOUR stream cipher.
 *
 * Module:  library/arc4.c
 * Caller:  library/cipher.c
 *
 * This module enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_RSA_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_RSA_WITH_RC4_128_MD5
 *      MBEDTLS_TLS_RSA_PSK_WITH_RC4_128_SHA
 *      MBEDTLS_TLS_PSK_WITH_RC4_128_SHA
 *
 * \warning   ARC4 is considered a weak cipher and its use constitutes a
 *            security risk. If possible, we recommend avoidng dependencies on
 *            it, and considering stronger ciphers instead.
 *
 */
#define MBEDTLS_ARC4_C

/**
 * \def MBEDTLS_ASN1_PARSE_C
 *
 * Enable the generic ASN1 parser.
 *
 * Module:  library/asn1.c
 * Caller:  library/x509.c
 *          library/dhm.c
 *          library/pkcs12.c
 *          library/pkcs5.c
 *          library/pkparse.c
 */
#define MBEDTLS_ASN1_PARSE_C

/**
 * \def MBEDTLS_ASN1_WRITE_C
 *
 * Enable the generic ASN1 writer.
 *
 * Module:  library/asn1write.c
 * Caller:  library/ecdsa.c
 *          library/pkwrite.c
 *          library/x509_create.c
 *          library/x509write_crt.c
 *          library/x509write_csr.c
 */
#define MBEDTLS_ASN1_WRITE_C

/**
 * \def MBEDTLS_BASE64_C
 *
 * Enable the Base64 module.
 *
 * Module:  library/base64.c
 * Caller:  library/pem.c
 *
 * This module is required for PEM support (required by X.509).
 */
#define MBEDTLS_BASE64_C

/**
 * \def MBEDTLS_BIGNUM_C
 *
 * Enable the multi-precision integer library.
 *
 * Module:  library/bignum.c
 * Caller:  library/dhm.c
 *          library/ecp.c
 *          library/ecdsa.c
 *          library/rsa.c
 *          library/rsa_internal.c
 *          library/ssl_tls.c
 *
 * This module is required for RSA, DHM and ECC (ECDH, ECDSA) support.
 */
#define MBEDTLS_BIGNUM_C

/**
 * \def MBEDTLS_BLOWFISH_C
 *
 * Enable the Blowfish block cipher.
 *
 * Module:  library/blowfish.c
 */
#define MBEDTLS_BLOWFISH_C

/**
 * \def MBEDTLS_CAMELLIA_C
 *
 * Enable the Camellia block cipher.
 *
 * Module:  library/camellia.c
 * Caller:  library/cipher.c
 *
 * This module enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
 *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256
 *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384
 *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384
 *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256
 *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256
 */
#define MBEDTLS_CAMELLIA_C

/**
 * \def MBEDTLS_ARIA_C
 *
 * Enable the ARIA block cipher.
 *
 * Module:  library/aria.c
 * Caller:  library/cipher.c
 *
 * This module enables the following ciphersuites (if other requisites are
 * enabled as well):
 *
 *      MBEDTLS_TLS_RSA_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_RSA_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_PSK_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_PSK_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384
 *      MBEDTLS_TLS_PSK_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_PSK_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256
 *      MBEDTLS_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384
 */
//#define MBEDTLS_ARIA_C

/**
 * \def MBEDTLS_CCM_C
 *
 * Enable the Counter with CBC-MAC (CCM) mode for 128-bit block cipher.
 *
 * Module:  library/ccm.c
 *
 * Requires: MBEDTLS_AES_C or MBEDTLS_CAMELLIA_C
 *
 * This module enables the AES-CCM ciphersuites, if other requisites are
 * enabled as well.
 */
#define MBEDTLS_CCM_C

/**
 * \def MBEDTLS_CERTS_C
 *
 * Enable the test certificates.
 *
 * Module:  library/certs.c
 * Caller:
 *
 * This module is used for testing (ssl_client/server).
 */
#define MBEDTLS_CERTS_C

/**
 * \def MBEDTLS_CHACHA20_C
 *
 * Enable the ChaCha20 stream cipher.
 *
 * Module:  library/chacha20.c
 */
#define MBEDTLS_CHACHA20_C

/**
 * \def MBEDTLS_CHACHAPOLY_C
 *
 * Enable the ChaCha20-Poly1305 AEAD algorithm.
 *
 * Module:  library/chachapoly.c
 *
 * This module requires: MBEDTLS_CHACHA20_C, MBEDTLS_POLY1305_C
 */
#define MBEDTLS_CHACHAPOLY_C

/**
 * \def MBEDTLS_CIPHER_C
 *
 * Enable the generic cipher layer.
 *
 * Module:  library/cipher.c
 * Caller:  library/ssl_tls.c
 *
 * Uncomment to enable generic cipher wrappers.
 */
#define MBEDTLS_CIPHER_C

/**
 * \def MBEDTLS_CMAC_C
 *
 * Enable the CMAC (Cipher-based Message Authentication Code) mode for block
 * ciphers.
 *
 * \note When #MBEDTLS_CMAC_ALT is active, meaning that the underlying
 *       implementation of the CMAC algorithm is provided by an alternate
 *       implementation, that alternate implementation may opt to not support
 *       AES-192 or 3DES as underlying block ciphers for the CMAC operation.
 *
 * Module:  library/cmac.c
 *
 * Requires: MBEDTLS_AES_C or MBEDTLS_DES_C
 *
 */
//#define MBEDTLS_CMAC_C

/**
 * \def MBEDTLS_CTR_DRBG_C
 *
 * Enable the CTR_DRBG AES-based random generator.
 * The CTR_DRBG generator uses AES-256 by default.
 * To use AES-128 instead, enable \c MBEDTLS_CTR_DRBG_USE_128_BIT_KEY above.
 *
 * \note To achieve a 256-bit security strength with CTR_DRBG,
 *       you must use AES-256 *and* use sufficient entropy.
 *       See ctr_drbg.h for more details.
 *
 * Module:  library/ctr_drbg.c
 * Caller:
 *
 * Requires: MBEDTLS_AES_C
 *
 * This module provides the CTR_DRBG AES random number generator.
 */
#define MBEDTLS_CTR_DRBG_C

/**
 * \def MBEDTLS_DEBUG_C
 *
 * Enable the debug functions.
 *
 * Module:  library/debug.c
 * Caller:  library/ssl_cli.c
 *          library/ssl_srv.c
 *          library/ssl_tls.c
 *
 * This module provides debugging functions.
 */
#define MBEDTLS_DEBUG_C

/**
 * \def MBEDTLS_DES_C
 *
 * Enable the DES block cipher.
 *
 * Module:  library/des.c
 * Caller:  library/pem.c
 *          library/cipher.c
 *
 * This module enables the following ciphersuites (if other requisites are
 * enabled as well):
 *      MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA
 *      MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA
 *
 * PEM_PARSE uses DES/3DES for decrypting encrypted keys.
 *
 * \warning   DES is considered a weak cipher and its use constitutes a
 *            security risk. We recommend considering stronger ciphers instead.
 */
#define MBEDTLS_DES_C

/**
 * \def MBEDTLS_DHM_C
 *
 * Enable the Diffie-Hellman-Merkle module.
 *
 * Module:  library/dhm.c
 * Caller:  library/ssl_cli.c
 *          library/ssl_srv.c
 *
 * This module is used by the following key exchanges:
 *      DHE-RSA, DHE-PSK
 *
 * \warning    Using DHE constitutes a security risk as it
 *             is not possible to validate custom DH parameters.
 *             If possible, it is recommended users should consider
 *             preferring other methods of key exchange.
 *             See dhm.h for more details.
 *
 */
#define MBEDTLS_DHM_C

/**
 * \def MBEDTLS_ECDH_C
 *
 * Enable the elliptic curve Diffie-Hellman library.
 *
 * Module:  library/ecdh.c
 * Caller:  library/ssl_cli.c
 *          library/ssl_srv.c
 *
 * This module is used by the following key exchanges:
 *      ECDHE-ECDSA, ECDHE-RSA, DHE-PSK
 *
 * Requires: MBEDTLS_ECP_C
 */
#define MBEDTLS_ECDH_C

/**
 * \def MBEDTLS_ECDSA_C
 *
 * Enable the elliptic curve DSA library.
 *
 * Module:  library/ecdsa.c
 * Caller:
 *
 * This module is used by the following key exchanges:
 *      ECDHE-ECDSA
 *
 * Requires: MBEDTLS_ECP_C, MBEDTLS_ASN1_WRITE_C, MBEDTLS_ASN1_PARSE_C,
 *           and at least one MBEDTLS_ECP_DP_XXX_ENABLED for a
 *           short Weierstrass curve.
 */
#define MBEDTLS_ECDSA_C

/**
 * \def MBEDTLS_ECJPAKE_C
 *
 * Enable the elliptic curve J-PAKE library.
 *
 * \warning This is currently experimental. EC J-PAKE support is based on the
 * Thread v1.0.0 specification; incompatible changes to the specification
 * might still happen. For this reason, this is disabled by default.
 *
 * Module:  library/ecjpake.c
 * Caller:
 *
 * This module is used by the following key exchanges:
 *      ECJPAKE
 *
 * Requires: MBEDTLS_ECP_C, MBEDTLS_MD_C
 */
//#define MBEDTLS_ECJPAKE_C

/**
 * \def MBEDTLS_ECP_C
 *
 * Enable the elliptic curve over GF(p) library.
 *
 * Module:  library/ecp.c
 * Caller:  library/ecdh.c
 *          library/ecdsa.c
 *          library/ecjpake.c
 *
 * Requires: MBEDTLS_BIGNUM_C and at least one MBEDTLS_ECP_DP_XXX_ENABLED
 */
#define MBEDTLS_ECP_C

/**
 * \def MBEDTLS_ENTROPY_C
 *
 * Enable the platform-specific entropy code.
 *
 * Module:  library/entropy.c
 * Caller:
 *
 * Requires: MBEDTLS_SHA512_C or MBEDTLS_SHA256_C
 *
 * This module provides a generic entropy pool
 */
#define MBEDTLS_ENTROPY_C

/**
 * \def MBEDTLS_ERROR_C
 *
 * Enable error code to error string conversion.
 *
 * Module:  library/error.c
 * Caller:
 *
 * This module enables mbedtls_strerror().
 */
#define MBEDTLS_ERROR_C

/**
 * \def MBEDTLS_GCM_C
 *
 * Enable the Galois/Counter Mode (GCM).
 *
 * Module:  library/gcm.c
 *
 * Requires: MBEDTLS_AES_C or MBEDTLS_CAMELLIA_C or MBEDTLS_ARIA_C
 *
 * This module enables the AES-GCM and CAMELLIA-GCM ciphersuites, if other
 * requisites are enabled as well.
 */
#define MBEDTLS_GCM_C

/**
 * \def MBEDTLS_HAVEGE_C
 *
 * Enable the HAVEGE random generator.
 *
 * Warning: the HAVEGE random generator is not suitable for virtualized
 *          environments
 *
 * Warning: the HAVEGE random generator is dependent on timing and specific
 *          processor traits. It is therefore not advised to use HAVEGE as
 *          your applications primary random generator or primary entropy pool
 *          input. As a secondary input to your entropy pool, it IS able add
 *          the (limited) extra entropy it provides.
 *
 * Module:  library/havege.c
 * Caller:
 *
 * Requires: MBEDTLS_TIMING_C
 *
 * Uncomment to enable the HAVEGE random generator.
 */
//#define MBEDTLS_HAVEGE_C

/**
 * \def MBEDTLS_HKDF_C
 *
 * Enable the HKDF algorithm (RFC 5869).
 *
 * Module:  library/hkdf.c
 * Caller:
 *
 * Requires: MBEDTLS_MD_C
 *
 * This module adds support for the Hashed Message Authentication Code
 * (HMAC)-based key derivation function (HKDF).
 */
#define MBEDTLS_HKDF_C

/**
 * \def MBEDTLS_HMAC_DRBG_C
 *
 * Enable the HMAC_DRBG random generator.
 *
 * Module:  library/hmac_drbg.c
 * Caller:
 *
 * Requires: MBEDTLS_MD_C
 *
 * Uncomment to enable the HMAC_DRBG random number geerator.
 */
#define MBEDTLS_HMAC_DRBG_C

/**
 * \def MBEDTLS_NIST_KW_C
 *
 * Enable the Key Wrapping mode for 128-bit block ciphers,
 * as defined in NIST SP 800-38F. Only KW and KWP modes
 * are supported. At the moment, only AES is approved by NIST.
 *
 * Module:  library/nist_kw.c
 *
 * Requires: MBEDTLS_AES_C and MBEDTLS_CIPHER_C
 */
//#define MBEDTLS_NIST_KW_C

/**
 * \def MBEDTLS_MD_C
 *
 * Enable the generic message digest layer.
 *
 * Module:  library/md.c
 * Caller:
 *
 * Uncomment to enable generic message digest wrappers.
 */
#define MBEDTLS_MD_C

/**
 * \def MBEDTLS_MD2_C
 *
 * Enable the MD2 hash algorithm.
 *
 * Module:  library/md2.c
 * Caller:
 *
 * Uncomment to enable support for (rare) MD2-signed X.509 certs.
 *
 * \warning   MD2 is considered a weak message digest and its use constitutes a
 *            security risk. If possible, we recommend avoiding dependencies on
 *            it, and considering stronger message digests instead.
 *
 */
//#define MBEDTLS_MD2_C

/**
 * \def MBEDTLS_MD4_C
 *
 * Enable the MD4 hash algorithm.
 *
 * Module:  library/md4.c
 * Caller:
 *
 * Uncomment to enable support for (rare) MD4-signed X.509 certs.
 *
 * \warning   MD4 is considered a weak message digest and its use constitutes a
 *            security risk. If possible, we recommend avoiding dependencies on
 *            it, and considering stronger message digests instead.
 *
 */
//#define MBEDTLS_MD4_C

/**
 * \def MBEDTLS_MD5_C
 *
 * Enable the MD5 hash algorithm.
 *
 * Module:  library/md5.c
 * Caller:  library/md.c
 *          library/pem.c
 *          library/ssl_tls.c
 *
 * This module is required for SSL/TLS up to version 1.1, and for TLS 1.2
 * depending on the handshake parameters. Further, it is used for checking
 * MD5-signed certificates, and for PBKDF1 when decrypting PEM-encoded
 * encrypted keys.
 *
 * \warning   MD5 is considered a weak message digest and its use constitutes a
 *            security risk. If possible, we recommend avoiding dependencies on
 *            it, and considering stronger message digests instead.
 *
 */
#define MBEDTLS_MD5_C

/**
 * \def MBEDTLS_MEMORY_BUFFER_ALLOC_C
 *
 * Enable the buffer allocator implementation that makes use of a (stack)
 * based buffer to 'allocate' dynamic memory. (replaces calloc() and free()
 * calls)
 *
 * Module:  library/memory_buffer_alloc.c
 *
 * Requires: MBEDTLS_PLATFORM_C
 *           MBEDTLS_PLATFORM_MEMORY (to use it within mbed TLS)
 *
 * Enable this module to enable the buffer memory allocator.
 */
//#define MBEDTLS_MEMORY_BUFFER_ALLOC_C

/**
 * \def MBEDTLS_NET_C
 *
 * Enable the TCP and UDP over IPv6/IPv4 networking routines.
 *
 * \note This module only works on POSIX/Unix (including Linux, BSD and OS X)
 * and Windows. For other platforms, you'll want to disable it, and write your
 * own networking callbacks to be passed to \c mbedtls_ssl_set_bio().
 *
 * \note See also our Knowledge Base article about porting to a new
 * environment:
 * https://tls.mbed.org/kb/how-to/how-do-i-port-mbed-tls-to-a-new-environment-OS
 *
 * Module:  library/net_sockets.c
 *
 * This module provides networking routines.
 */
#define MBEDTLS_NET_C

/**
 * \def MBEDTLS_OID_C
 *
 * Enable the OID database.
 *
 * Module:  library/oid.c
 * Caller:  library/asn1write.c
 *          library/pkcs5.c
 *          library/pkparse.c
 *          library/pkwrite.c
 *          library/rsa.c
 *          library/x509.c
 *          library/x509_create.c
 *          library/x509_crl.c
 *          library/x509_crt.c
 *          library/x509_csr.c
 *          library/x509write_crt.c
 *          library/x509write_csr.c
 *
 * This modules translates between OIDs and internal values.
 */
#define MBEDTLS_OID_C

/**
 * \def MBEDTLS_PADLOCK_C
 *
 * Enable VIA Padlock support on x86.
 *
 * Module:  library/padlock.c
 * Caller:  library/aes.c
 *
 * Requires: MBEDTLS_HAVE_ASM
 *
 * This modules adds support for the VIA PadLock on x86.
 */
#define MBEDTLS_PADLOCK_C

/**
 * \def MBEDTLS_PEM_PARSE_C
 *
 * Enable PEM decoding / parsing.
 *
 * Module:  library/pem.c
 * Caller:  library/dhm.c
 *          library/pkparse.c
 *          library/x509_crl.c
 *          library/x509_crt.c
 *          library/x509_csr.c
 *
 * Requires: MBEDTLS_BASE64_C
 *
 * This modules adds support for decoding / parsing PEM files.
 */
#define MBEDTLS_PEM_PARSE_C

/**
 * \def MBEDTLS_PEM_WRITE_C
 *
 * Enable PEM encoding / writing.
 *
 * Module:  library/pem.c
 * Caller:  library/pkwrite.c
 *          library/x509write_crt.c
 *          library/x509write_csr.c
 *
 * Requires: MBEDTLS_BASE64_C
 *
 * This modules adds support for encoding / writing PEM files.
 */
#define MBEDTLS_PEM_WRITE_C

/**
 * \def MBEDTLS_PK_C
 *
 * Enable the generic public (asymetric) key layer.
 *
 * Module:  library/pk.c
 * Caller:  library/ssl_tls.c
 *          library/ssl_cli.c
 *          library/ssl_srv.c
 *
 * Requires: MBEDTLS_RSA_C or MBEDTLS_ECP_C
 *
 * Uncomment to enable generic public key wrappers.
 */
#define MBEDTLS_PK_C

/**
 * \def MBEDTLS_PK_PARSE_C
 *
 * Enable the generic public (asymetric) key parser.
 *
 * Module:  library/pkparse.c
 * Caller:  library/x509_crt.c
 *          library/x509_csr.c
 *
 * Requires: MBEDTLS_PK_C
 *
 * Uncomment to enable generic public key parse functions.
 */
#define MBEDTLS_PK_PARSE_C

/**
 * \def MBEDTLS_PK_WRITE_C
 *
 * Enable the generic public (asymetric) key writer.
 *
 * Module:  library/pkwrite.c
 * Caller:  library/x509write.c
 *
 * Requires: MBEDTLS_PK_C
 *
 * Uncomment to enable generic public key write functions.
 */
#define MBEDTLS_PK_WRITE_C

/**
 * \def MBEDTLS_PKCS5_C
 *
 * Enable PKCS#5 functions.
 *
 * Module:  library/pkcs5.c
 *
 * Requires: MBEDTLS_MD_C
 *
 * This module adds support for the PKCS#5 functions.
 */
#define MBEDTLS_PKCS5_C

/**
 * \def MBEDTLS_PKCS11_C
 *
 * Enable wrapper for PKCS#11 smartcard support via the pkcs11-helper library.
 *
 * \deprecated This option is deprecated and will be removed in a future
 *             version of Mbed TLS.
 *
 * Module:  library/pkcs11.c
 * Caller:  library/pk.c
 *
 * Requires: MBEDTLS_PK_C
 *
 * This module enables SSL/TLS PKCS #11 smartcard support.
 * Requires the presence of the PKCS#11 helper library (libpkcs11-helper)
 */
//#define MBEDTLS_PKCS11_C

/**
 * \def MBEDTLS_PKCS12_C
 *
 * Enable PKCS#12 PBE functions.
 * Adds algorithms for parsing PKCS#8 encrypted private keys
 *
 * Module:  library/pkcs12.c
 * Caller:  library/pkparse.c
 *
 * Requires: MBEDTLS_ASN1_PARSE_C, MBEDTLS_CIPHER_C, MBEDTLS_MD_C
 * Can use:  MBEDTLS_ARC4_C
 *
 * This module enables PKCS#12 functions.
 */
#define MBEDTLS_PKCS12_C

/**
 * \def MBEDTLS_PLATFORM_C
 *
 * Enable the platform abstraction layer that allows you to re-assign
 * functions like calloc(), free(), snprintf(), printf(), fprintf(), exit().
 *
 * Enabling MBEDTLS_PLATFORM_C enables to use of MBEDTLS_PLATFORM_XXX_ALT
 * or MBEDTLS_PLATFORM_XXX_MACRO directives, allowing the functions mentioned
 * above to be specified at runtime or compile time respectively.
 *
 * \note This abstraction layer must be enabled on Windows (including MSYS2)
 * as other module rely on it for a fixed snprintf implementation.
 *
 * Module:  library/platform.c
 * Caller:  Most other .c files
 *
 * This module enables abstraction of common (libc) functions.
 */
#define MBEDTLS_PLATFORM_C

/**
 * \def MBEDTLS_POLY1305_C
 *
 * Enable the Poly1305 MAC algorithm.
 *
 * Module:  library/poly1305.c
 * Caller:  library/chachapoly.c
 */
#define MBEDTLS_POLY1305_C

/**
 * \def MBEDTLS_PSA_CRYPTO_C
 *
 * Enable the Platform Security Architecture cryptography API.
 *
 * Module:  library/psa_crypto.c
 *
 * Requires: either MBEDTLS_CTR_DRBG_C and MBEDTLS_ENTROPY_C,
 *           or MBEDTLS_HMAC_DRBG_C and MBEDTLS_ENTROPY_C,
 *           or MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG.
 *
 */
#define MBEDTLS_PSA_CRYPTO_C

/**
 * \def MBEDTLS_PSA_CRYPTO_SE_C
 *
 * Enable secure element support in the Platform Security Architecture
 * cryptography API.
 *
 * \warning This feature is not yet suitable for production. It is provided
 *          for API evaluation and testing purposes only.
 *
 * Module:  library/psa_crypto_se.c
 *
 * Requires: MBEDTLS_PSA_CRYPTO_C, MBEDTLS_PSA_CRYPTO_STORAGE_C
 *
 */
//#define MBEDTLS_PSA_CRYPTO_SE_C

/**
 * \def MBEDTLS_PSA_CRYPTO_STORAGE_C
 *
 * Enable the Platform Security Architecture persistent key storage.
 *
 * Module:  library/psa_crypto_storage.c
 *
 * Requires: MBEDTLS_PSA_CRYPTO_C,
 *           either MBEDTLS_PSA_ITS_FILE_C or a native implementation of
 *           the PSA ITS interface
 */
#define MBEDTLS_PSA_CRYPTO_STORAGE_C

/**
 * \def MBEDTLS_PSA_ITS_FILE_C
 *
 * Enable the emulation of the Platform Security Architecture
 * Internal Trusted Storage (PSA ITS) over files.
 *
 * Module:  library/psa_its_file.c
 *
 * Requires: MBEDTLS_FS_IO
 */
#define MBEDTLS_PSA_ITS_FILE_C

/**
 * \def MBEDTLS_RIPEMD160_C
 *
 * Enable the RIPEMD-160 hash algorithm.
 *
 * Module:  library/ripemd160.c
 * Caller:  library/md.c
 *
 */
#define MBEDTLS_RIPEMD160_C

/**
 * \def MBEDTLS_RSA_C
 *
 * Enable the RSA public-key cryptosystem.
 *
 * Module:  library/rsa.c
 *          library/rsa_internal.c
 * Caller:  library/ssl_cli.c
 *          library/ssl_srv.c
 *          library/ssl_tls.c
 *          library/x509.c
 *
 * This module is used by the following key exchanges:
 *      RSA, DHE-RSA, ECDHE-RSA, RSA-PSK
 *
 * Requires: MBEDTLS_BIGNUM_C, MBEDTLS_OID_C
 */
#define MBEDTLS_RSA_C

/**
 * \def MBEDTLS_SHA1_C
 *
 * Enable the SHA1 cryptographic hash algorithm.
 *
 * Module:  library/sha1.c
 * Caller:  library/md.c
 *          library/ssl_cli.c
 *          library/ssl_srv.c
 *          library/ssl_tls.c
 *          library/x509write_crt.c
 *
 * This module is required for SSL/TLS up to version 1.1, for TLS 1.2
 * depending on the handshake parameters, and for SHA1-signed certificates.
 *
 * \warning   SHA-1 is considered a weak message digest and its use constitutes
 *            a security risk. If possible, we recommend avoiding dependencies
 *            on it, and considering stronger message digests instead.
 *
 */
#define MBEDTLS_SHA1_C

/**
 * \def MBEDTLS_SHA256_C
 *
 * Enable the SHA-224 and SHA-256 cryptographic hash algorithms.
 *
 * Module:  library/sha256.c
 * Caller:  library/entropy.c
 *          library/md.c
 *          library/ssl_cli.c
 *          library/ssl_srv.c
 *          library/ssl_tls.c
 *
 * This module adds support for SHA-224 and SHA-256.
 * This module is required for the SSL/TLS 1.2 PRF function.
 */
#define MBEDTLS_SHA256_C

/**
 * \def MBEDTLS_SHA512_C
 *
 * Enable the SHA-384 and SHA-512 cryptographic hash algorithms.
 *
 * Module:  library/sha512.c
 * Caller:  library/entropy.c
 *          library/md.c
 *          library/ssl_cli.c
 *          library/ssl_srv.c
 *
 * This module adds support for SHA-384 and SHA-512.
 */
#define MBEDTLS_SHA512_C

/**
 * \def MBEDTLS_SSL_CACHE_C
 *
 * Enable simple SSL cache implementation.
 *
 * Module:  library/ssl_cache.c
 * Caller:
 *
 * Requires: MBEDTLS_SSL_CACHE_C
 */
#define MBEDTLS_SSL_CACHE_C

/**
 * \def MBEDTLS_SSL_COOKIE_C
 *
 * Enable basic implementation of DTLS cookies for hello verification.
 *
 * Module:  library/ssl_cookie.c
 * Caller:
 */
#define MBEDTLS_SSL_COOKIE_C

/**
 * \def MBEDTLS_SSL_TICKET_C
 *
 * Enable an implementation of TLS server-side callbacks for session tickets.
 *
 * Module:  library/ssl_ticket.c
 * Caller:
 *
 * Requires: MBEDTLS_CIPHER_C
 */
#define MBEDTLS_SSL_TICKET_C

/**
 * \def MBEDTLS_SSL_CLI_C
 *
 * Enable the SSL/TLS client code.
 *
 * Module:  library/ssl_cli.c
 * Caller:
 *
 * Requires: MBEDTLS_SSL_TLS_C
 *
 * This module is required for SSL/TLS client support.
 */
#define MBEDTLS_SSL_CLI_C

/**
 * \def MBEDTLS_SSL_SRV_C
 *
 * Enable the SSL/TLS server code.
 *
 * Module:  library/ssl_srv.c
 * Caller:
 *
 * Requires: MBEDTLS_SSL_TLS_C
 *
 * This module is required for SSL/TLS server support.
 */
#define MBEDTLS_SSL_SRV_C

/**
 * \def MBEDTLS_SSL_TLS_C
 *
 * Enable the generic SSL/TLS code.
 *
 * Module:  library/ssl_tls.c
 * Caller:  library/ssl_cli.c
 *          library/ssl_srv.c
 *
 * Requires: MBEDTLS_CIPHER_C, MBEDTLS_MD_C
 *           and at least one of the MBEDTLS_SSL_PROTO_XXX defines
 *
 * This module is required for SSL/TLS.
 */
#define MBEDTLS_SSL_TLS_C

/**
 * \def MBEDTLS_THREADING_C
 *
 * Enable the threading abstraction layer.
 * By default mbed TLS assumes it is used in a non-threaded environment or that
 * contexts are not shared between threads. If you do intend to use contexts
 * between threads, you will need to enable this layer to prevent race
 * conditions. See also our Knowledge Base article about threading:
 * https://tls.mbed.org/kb/development/thread-safety-and-multi-threading
 *
 * Module:  library/threading.c
 *
 * This allows different threading implementations (self-implemented or
 * provided).
 *
 * You will have to enable either MBEDTLS_THREADING_ALT or
 * MBEDTLS_THREADING_PTHREAD.
 *
 * Enable this layer to allow use of mutexes within mbed TLS
 */
//#define MBEDTLS_THREADING_C

/**
 * \def MBEDTLS_TIMING_C
 *
 * Enable the semi-portable timing interface.
 *
 * \note The provided implementation only works on POSIX/Unix (including Linux,
 * BSD and OS X) and Windows. On other platforms, you can either disable that
 * module and provide your own implementations of the callbacks needed by
 * \c mbedtls_ssl_set_timer_cb() for DTLS, or leave it enabled and provide
 * your own implementation of the whole module by setting
 * \c MBEDTLS_TIMING_ALT in the current file.
 *
 * \note See also our Knowledge Base article about porting to a new
 * environment:
 * https://tls.mbed.org/kb/how-to/how-do-i-port-mbed-tls-to-a-new-environment-OS
 *
 * Module:  library/timing.c
 * Caller:  library/havege.c
 *
 * This module is used by the HAVEGE random number generator.
 */
#define MBEDTLS_TIMING_C

/**
 * \def MBEDTLS_VERSION_C
 *
 * Enable run-time version information.
 *
 * Module:  library/version.c
 *
 * This module provides run-time version information.
 */
#define MBEDTLS_VERSION_C

/**
 * \def MBEDTLS_X509_USE_C
 *
 * Enable X.509 core for using certificates.
 *
 * Module:  library/x509.c
 * Caller:  library/x509_crl.c
 *          library/x509_crt.c
 *          library/x509_csr.c
 *
 * Requires: MBEDTLS_ASN1_PARSE_C, MBEDTLS_BIGNUM_C, MBEDTLS_OID_C,
 *           MBEDTLS_PK_PARSE_C
 *
 * This module is required for the X.509 parsing modules.
 */
#define MBEDTLS_X509_USE_C

/**
 * \def MBEDTLS_X509_CRT_PARSE_C
 *
 * Enable X.509 certificate parsing.
 *
 * Module:  library/x509_crt.c
 * Caller:  library/ssl_cli.c
 *          library/ssl_srv.c
 *          library/ssl_tls.c
 *
 * Requires: MBEDTLS_X509_USE_C
 *
 * This module is required for X.509 certificate parsing.
 */
#define MBEDTLS_X509_CRT_PARSE_C

/**
 * \def MBEDTLS_X509_CRL_PARSE_C
 *
 * Enable X.509 CRL parsing.
 *
 * Module:  library/x509_crl.c
 * Caller:  library/x509_crt.c
 *
 * Requires: MBEDTLS_X509_USE_C
 *
 * This module is required for X.509 CRL parsing.
 */
#define MBEDTLS_X509_CRL_PARSE_C

/**
 * \def MBEDTLS_X509_CSR_PARSE_C
 *
 * Enable X.509 Certificate Signing Request (CSR) parsing.
 *
 * Module:  library/x509_csr.c
 * Caller:  library/x509_crt_write.c
 *
 * Requires: MBEDTLS_X509_USE_C
 *
 * This module is used for reading X.509 certificate request.
 */
#define MBEDTLS_X509_CSR_PARSE_C

/**
 * \def MBEDTLS_X509_CREATE_C
 *
 * Enable X.509 core for creating certificates.
 *
 * Module:  library/x509_create.c
 *
 * Requires: MBEDTLS_BIGNUM_C, MBEDTLS_OID_C, MBEDTLS_PK_WRITE_C
 *
 * This module is the basis for creating X.509 certificates and CSRs.
 */
#define MBEDTLS_X509_CREATE_C

/**
 * \def MBEDTLS_X509_CRT_WRITE_C
 *
 * Enable creating X.509 certificates.
 *
 * Module:  library/x509_crt_write.c
 *
 * Requires: MBEDTLS_X509_CREATE_C
 *
 * This module is required for X.509 certificate creation.
 */
#define MBEDTLS_X509_CRT_WRITE_C

/**
 * \def MBEDTLS_X509_CSR_WRITE_C
 *
 * Enable creating X.509 Certificate Signing Requests (CSR).
 *
 * Module:  library/x509_csr_write.c
 *
 * Requires: MBEDTLS_X509_CREATE_C
 *
 * This module is required for X.509 certificate request writing.
 */
#define MBEDTLS_X509_CSR_WRITE_C

/**
 * \def MBEDTLS_XTEA_C
 *
 * Enable the XTEA block cipher.
 *
 * Module:  library/xtea.c
 * Caller:
 */
#define MBEDTLS_XTEA_C

/* \} name SECTION: mbed TLS modules */

/**
 * \name SECTION: Module configuration options
 *
 * This section allows for the setting of module specific sizes and
 * configuration options. The default values are already present in the
 * relevant header files and should suffice for the regular use cases.
 *
 * Our advice is to enable options and change their values here
 * only if you have a good reason and know the consequences.
 *
 * Please check the respective header file for documentation on these
 * parameters (to prevent duplicate documentation).
 * \{
 */

/* MPI / BIGNUM options */
//#define MBEDTLS_MPI_WINDOW_SIZE            6 /**< Maximum window size used. */
//#define MBEDTLS_MPI_MAX_SIZE            1024 /**< Maximum number of bytes for usable MPIs. */

/* CTR_DRBG options */
//#define MBEDTLS_CTR_DRBG_ENTROPY_LEN               48 /**< Amount of entropy used per seed by default (48 with SHA-512, 32 with SHA-256) */
//#define MBEDTLS_CTR_DRBG_RESEED_INTERVAL        10000 /**< Interval before reseed is performed by default */
//#define MBEDTLS_CTR_DRBG_MAX_INPUT                256 /**< Maximum number of additional input bytes */
//#define MBEDTLS_CTR_DRBG_MAX_REQUEST             1024 /**< Maximum number of requested bytes per call */
//#define MBEDTLS_CTR_DRBG_MAX_SEED_INPUT           384 /**< Maximum size of (re)seed buffer */

/* HMAC_DRBG options */
//#define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL   10000 /**< Interval before reseed is performed by default */
//#define MBEDTLS_HMAC_DRBG_MAX_INPUT           256 /**< Maximum number of additional input bytes */
//#define MBEDTLS_HMAC_DRBG_MAX_REQUEST        1024 /**< Maximum number of requested bytes per call */
//#define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT      384 /**< Maximum size of (re)seed buffer */

/* ECP options */
//#define MBEDTLS_ECP_MAX_BITS             521 /**< Maximum bit size of groups. Normally determined automatically from the configured curves. */
//#define MBEDTLS_ECP_WINDOW_SIZE            4 /**< Maximum window size used */
//#define MBEDTLS_ECP_FIXED_POINT_OPTIM      1 /**< Enable fixed-point speed-up */

/* Entropy options */
//#define MBEDTLS_ENTROPY_MAX_SOURCES                20 /**< Maximum number of sources supported */
//#define MBEDTLS_ENTROPY_MAX_GATHER                128 /**< Maximum amount requested from entropy sources */
//#define MBEDTLS_ENTROPY_MIN_HARDWARE               32 /**< Default minimum number of bytes required for the hardware entropy source mbedtls_hardware_poll() before entropy is released */

/* Memory buffer allocator options */
//#define MBEDTLS_MEMORY_ALIGN_MULTIPLE      4 /**< Align on multiples of this value */

/* Platform options */
//#define MBEDTLS_PLATFORM_STD_MEM_HDR   <stdlib.h> /**< Header to include if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS is defined. Don't define if no header is needed. */
//#define MBEDTLS_PLATFORM_STD_CALLOC        calloc /**< Default allocator to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_FREE            free /**< Default free to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_EXIT            exit /**< Default exit to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_TIME            time /**< Default time to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
//#define MBEDTLS_PLATFORM_STD_FPRINTF      fprintf /**< Default fprintf to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_PRINTF        printf /**< Default printf to use, can be undefined */
/* Note: your snprintf must correctly zero-terminate the buffer! */
//#define MBEDTLS_PLATFORM_STD_SNPRINTF    snprintf /**< Default snprintf to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_EXIT_SUCCESS       0 /**< Default exit value to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_EXIT_FAILURE       1 /**< Default exit value to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_NV_SEED_READ   mbedtls_platform_std_nv_seed_read /**< Default nv_seed_read function to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE  mbedtls_platform_std_nv_seed_write /**< Default nv_seed_write function to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_NV_SEED_FILE  "seedfile" /**< Seed file to read/write with default implementation */

/* To Use Function Macros MBEDTLS_PLATFORM_C must be enabled */
/* MBEDTLS_PLATFORM_XXX_MACRO and MBEDTLS_PLATFORM_XXX_ALT cannot both be defined */
//#define MBEDTLS_PLATFORM_CALLOC_MACRO        calloc /**< Default allocator macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_FREE_MACRO            free /**< Default free macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_EXIT_MACRO            exit /**< Default exit macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_TIME_MACRO            time /**< Default time macro to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
//#define MBEDTLS_PLATFORM_TIME_TYPE_MACRO       time_t /**< Default time macro to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
//#define MBEDTLS_PLATFORM_FPRINTF_MACRO      fprintf /**< Default fprintf macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_PRINTF_MACRO        printf /**< Default printf macro to use, can be undefined */
/* Note: your snprintf must correctly zero-terminate the buffer! */
//#define MBEDTLS_PLATFORM_SNPRINTF_MACRO    snprintf /**< Default snprintf macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_VSNPRINTF_MACRO    vsnprintf /**< Default vsnprintf macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_NV_SEED_READ_MACRO   mbedtls_platform_std_nv_seed_read /**< Default nv_seed_read function to use, can be undefined */
//#define MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO  mbedtls_platform_std_nv_seed_write /**< Default nv_seed_write function to use, can be undefined */

/**
 * \brief       This macro is invoked by the library when an invalid parameter
 *              is detected that is only checked with #MBEDTLS_CHECK_PARAMS
 *              (see the documentation of that option for context).
 *
 *              When you leave this undefined here, the library provides
 *              a default definition. If the macro #MBEDTLS_CHECK_PARAMS_ASSERT
 *              is defined, the default definition is `assert(cond)`,
 *              otherwise the default definition calls a function
 *              mbedtls_param_failed(). This function is declared in
 *              `platform_util.h` for the benefit of the library, but
 *              you need to define in your application.
 *
 *              When you define this here, this replaces the default
 *              definition in platform_util.h (which no longer declares the
 *              function mbedtls_param_failed()) and it is your responsibility
 *              to make sure this macro expands to something suitable (in
 *              particular, that all the necessary declarations are visible
 *              from within the library - you can ensure that by providing
 *              them in this file next to the macro definition).
 *              If you define this macro to call `assert`, also define
 *              #MBEDTLS_CHECK_PARAMS_ASSERT so that library source files
 *              include `<assert.h>`.
 *
 *              Note that you may define this macro to expand to nothing, in
 *              which case you don't have to worry about declarations or
 *              definitions. However, you will then be notified about invalid
 *              parameters only in non-void functions, and void function will
 *              just silently return early on invalid parameters, which
 *              partially negates the benefits of enabling
 *              #MBEDTLS_CHECK_PARAMS in the first place, so is discouraged.
 *
 * \param cond  The expression that should evaluate to true, but doesn't.
 */
//#define MBEDTLS_PARAM_FAILED( cond )               assert( cond )

/** \def MBEDTLS_CHECK_RETURN
 *
 * This macro is used at the beginning of the declaration of a function
 * to indicate that its return value should be checked. It should
 * instruct the compiler to emit a warning or an error if the function
 * is called without checking its return value.
 *
 * There is a default implementation for popular compilers in platform_util.h.
 * You can override the default implementation by defining your own here.
 *
 * If the implementation here is empty, this will effectively disable the
 * checking of functions' return values.
 */
//#define MBEDTLS_CHECK_RETURN __attribute__((__warn_unused_result__))

/** \def MBEDTLS_IGNORE_RETURN
 *
 * This macro requires one argument, which should be a C function call.
 * If that function call would cause a #MBEDTLS_CHECK_RETURN warning, this
 * warning is suppressed.
 */
//#define MBEDTLS_IGNORE_RETURN( result ) ((void) !(result))

/* PSA options */
/**
 * Use HMAC_DRBG with the specified hash algorithm for HMAC_DRBG for the
 * PSA crypto subsystem.
 *
 * If this option is unset:
 * - If CTR_DRBG is available, the PSA subsystem uses it rather than HMAC_DRBG.
 * - Otherwise, the PSA subsystem uses HMAC_DRBG with either
 *   #MBEDTLS_MD_SHA512 or #MBEDTLS_MD_SHA256 based on availability and
 *   on unspecified heuristics.
 */
//#define MBEDTLS_PSA_HMAC_DRBG_MD_TYPE MBEDTLS_MD_SHA256

/** \def MBEDTLS_PSA_KEY_SLOT_COUNT
 * Restrict the PSA library to supporting a maximum amount of simultaneously
 * loaded keys. A loaded key is a key stored by the PSA Crypto core as a
 * volatile key, or a persistent key which is loaded temporarily by the
 * library as part of a crypto operation in flight.
 *
 * If this option is unset, the library will fall back to a default value of
 * 32 keys.
 */
//#define MBEDTLS_PSA_KEY_SLOT_COUNT 32

/* SSL Cache options */
//#define MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT       86400 /**< 1 day  */
//#define MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES      50 /**< Maximum entries in cache */

/* SSL options */

/** \def MBEDTLS_SSL_MAX_CONTENT_LEN
 *
 * Maximum length (in bytes) of incoming and outgoing plaintext fragments.
 *
 * This determines the size of both the incoming and outgoing TLS I/O buffers
 * in such a way that both are capable of holding the specified amount of
 * plaintext data, regardless of the protection mechanism used.
 *
 * To configure incoming and outgoing I/O buffers separately, use
 * #MBEDTLS_SSL_IN_CONTENT_LEN and #MBEDTLS_SSL_OUT_CONTENT_LEN,
 * which overwrite the value set by this option.
 *
 * \note When using a value less than the default of 16KB on the client, it is
 *       recommended to use the Maximum Fragment Length (MFL) extension to
 *       inform the server about this limitation. On the server, there
 *       is no supported, standardized way of informing the client about
 *       restriction on the maximum size of incoming messages, and unless
 *       the limitation has been communicated by other means, it is recommended
 *       to only change the outgoing buffer size #MBEDTLS_SSL_OUT_CONTENT_LEN
 *       while keeping the default value of 16KB for the incoming buffer.
 *
 * Uncomment to set the maximum plaintext size of both
 * incoming and outgoing I/O buffers.
 */
//#define MBEDTLS_SSL_MAX_CONTENT_LEN             16384

/** \def MBEDTLS_SSL_IN_CONTENT_LEN
 *
 * Maximum length (in bytes) of incoming plaintext fragments.
 *
 * This determines the size of the incoming TLS I/O buffer in such a way
 * that it is capable of holding the specified amount of plaintext data,
 * regardless of the protection mechanism used.
 *
 * If this option is undefined, it inherits its value from
 * #MBEDTLS_SSL_MAX_CONTENT_LEN.
 *
 * \note When using a value less than the default of 16KB on the client, it is
 *       recommended to use the Maximum Fragment Length (MFL) extension to
 *       inform the server about this limitation. On the server, there
 *       is no supported, standardized way of informing the client about
 *       restriction on the maximum size of incoming messages, and unless
 *       the limitation has been communicated by other means, it is recommended
 *       to only change the outgoing buffer size #MBEDTLS_SSL_OUT_CONTENT_LEN
 *       while keeping the default value of 16KB for the incoming buffer.
 *
 * Uncomment to set the maximum plaintext size of the incoming I/O buffer
 * independently of the outgoing I/O buffer.
 */
//#define MBEDTLS_SSL_IN_CONTENT_LEN              16384

/** \def MBEDTLS_SSL_CID_IN_LEN_MAX
 *
 * The maximum length of CIDs used for incoming DTLS messages.
 *
 */
//#define MBEDTLS_SSL_CID_IN_LEN_MAX 32

/** \def MBEDTLS_SSL_CID_OUT_LEN_MAX
 *
 * The maximum length of CIDs used for outgoing DTLS messages.
 *
 */
//#define MBEDTLS_SSL_CID_OUT_LEN_MAX 32

/** \def MBEDTLS_SSL_CID_PADDING_GRANULARITY
 *
 * This option controls the use of record plaintext padding
 * when using the Connection ID extension in DTLS 1.2.
 *
 * The padding will always be chosen so that the length of the
 * padded plaintext is a multiple of the value of this option.
 *
 * Note: A value of \c 1 means that no padding will be used
 *       for outgoing records.
 *
 * Note: On systems lacking division instructions,
 *       a power of two should be preferred.
 *
 */
//#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16

/** \def MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY
 *
 * This option controls the use of record plaintext padding
 * in TLS 1.3.
 *
 * The padding will always be chosen so that the length of the
 * padded plaintext is a multiple of the value of this option.
 *
 * Note: A value of \c 1 means that no padding will be used
 *       for outgoing records.
 *
 * Note: On systems lacking division instructions,
 *       a power of two should be preferred.
 */
//#define MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY 1

/** \def MBEDTLS_SSL_OUT_CONTENT_LEN
 *
 * Maximum length (in bytes) of outgoing plaintext fragments.
 *
 * This determines the size of the outgoing TLS I/O buffer in such a way
 * that it is capable of holding the specified amount of plaintext data,
 * regardless of the protection mechanism used.
 *
 * If this option undefined, it inherits its value from
 * #MBEDTLS_SSL_MAX_CONTENT_LEN.
 *
 * It is possible to save RAM by setting a smaller outward buffer, while keeping
 * the default inward 16384 byte buffer to conform to the TLS specification.
 *
 * The minimum required outward buffer size is determined by the handshake
 * protocol's usage. Handshaking will fail if the outward buffer is too small.
 * The specific size requirement depends on the configured ciphers and any
 * certificate data which is sent during the handshake.
 *
 * Uncomment to set the maximum plaintext size of the outgoing I/O buffer
 * independently of the incoming I/O buffer.
 */
//#define MBEDTLS_SSL_OUT_CONTENT_LEN             16384

/** \def MBEDTLS_SSL_DTLS_MAX_BUFFERING
 *
 * Maximum number of heap-allocated bytes for the purpose of
 * DTLS handshake message reassembly and future message buffering.
 *
 * This should be at least 9/8 * MBEDTLS_SSL_IN_CONTENT_LEN
 * to account for a reassembled handshake message of maximum size,
 * together with its reassembly bitmap.
 *
 * A value of 2 * MBEDTLS_SSL_IN_CONTENT_LEN (32768 by default)
 * should be sufficient for all practical situations as it allows
 * to reassembly a large handshake message (such as a certificate)
 * while buffering multiple smaller handshake messages.
 *
 */
//#define MBEDTLS_SSL_DTLS_MAX_BUFFERING             32768

//#define MBEDTLS_SSL_DEFAULT_TICKET_LIFETIME     86400 /**< Lifetime of session tickets (if enabled) */
//#define MBEDTLS_PSK_MAX_LEN               32 /**< Max size of TLS pre-shared keys, in bytes (default 256 bits) */
//#define MBEDTLS_SSL_COOKIE_TIMEOUT        60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */

/** \def MBEDTLS_TLS_EXT_CID
 *
 * At the time of writing, the CID extension has not been assigned its
 * final value. Set this configuration option to make Mbed TLS use a
 * different value.
 *
 * A future minor revision of Mbed TLS may change the default value of
 * this option to match evolving standards and usage.
 */
//#define MBEDTLS_TLS_EXT_CID                        254

/**
 * Complete list of ciphersuites to use, in order of preference.
 *
 * \warning No dependency checking is done on that field! This option can only
 * be used to restrict the set of available ciphersuites. It is your
 * responsibility to make sure the needed modules are active.
 *
 * Use this to save a few hundred bytes of ROM (default ordering of all
 * available ciphersuites) and a few to a few hundred bytes of RAM.
 *
 * The value below is only an example, not the default.
 */
//#define MBEDTLS_SSL_CIPHERSUITES MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256

/* X509 options */
//#define MBEDTLS_X509_MAX_INTERMEDIATE_CA   8   /**< Maximum number of intermediate CAs in a verification chain. */
//#define MBEDTLS_X509_MAX_FILE_PATH_LEN     512 /**< Maximum length of a path/filename string in bytes including the null terminator character ('\0'). */

/**
 * Allow SHA-1 in the default TLS configuration for TLS 1.2 handshake
 * signature and ciphersuite selection. Without this build-time option, SHA-1
 * support must be activated explicitly through mbedtls_ssl_conf_sig_hashes.
 * The use of SHA-1 in TLS <= 1.1 and in HMAC-SHA-1 is always allowed by
 * default. At the time of writing, there is no practical attack on the use
 * of SHA-1 in handshake signatures, hence this option is turned on by default
 * to preserve compatibility with existing peers, but the general
 * warning applies nonetheless:
 *
 * \warning   SHA-1 is considered a weak message digest and its use constitutes
 *            a security risk. If possible, we recommend avoiding dependencies
 *            on it, and considering stronger message digests instead.
 *
 */
//#define MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE

/**
 * Uncomment the macro to let mbed TLS use your alternate implementation of
 * mbedtls_platform_zeroize(). This replaces the default implementation in
 * platform_util.c.
 *
 * mbedtls_platform_zeroize() is a widely used function across the library to
 * zero a block of memory. The implementation is expected to be secure in the
 * sense that it has been written to prevent the compiler from removing calls
 * to mbedtls_platform_zeroize() as part of redundant code elimination
 * optimizations. However, it is difficult to guarantee that calls to
 * mbedtls_platform_zeroize() will not be optimized by the compiler as older
 * versions of the C language standards do not provide a secure implementation
 * of memset(). Therefore, MBEDTLS_PLATFORM_ZEROIZE_ALT enables users to
 * configure their own implementation of mbedtls_platform_zeroize(), for
 * example by using directives specific to their compiler, features from newer
 * C standards (e.g using memset_s() in C11) or calling a secure memset() from
 * their system (e.g explicit_bzero() in BSD).
 */
//#define MBEDTLS_PLATFORM_ZEROIZE_ALT

/**
 * Uncomment the macro to let Mbed TLS use your alternate implementation of
 * mbedtls_platform_gmtime_r(). This replaces the default implementation in
 * platform_util.c.
 *
 * gmtime() is not a thread-safe function as defined in the C standard. The
 * library will try to use safer implementations of this function, such as
 * gmtime_r() when available. However, if Mbed TLS cannot identify the target
 * system, the implementation of mbedtls_platform_gmtime_r() will default to
 * using the standard gmtime(). In this case, calls from the library to
 * gmtime() will be guarded by the global mutex mbedtls_threading_gmtime_mutex
 * if MBEDTLS_THREADING_C is enabled. We recommend that calls from outside the
 * library are also guarded with this mutex to avoid race conditions. However,
 * if the macro MBEDTLS_PLATFORM_GMTIME_R_ALT is defined, Mbed TLS will
 * unconditionally use the implementation for mbedtls_platform_gmtime_r()
 * supplied at compile time.
 */
//#define MBEDTLS_PLATFORM_GMTIME_R_ALT

/**
 * Enable the verified implementations of ECDH primitives from Project Everest
 * (currently only Curve25519). This feature changes the layout of ECDH
 * contexts and therefore is a compatibility break for applications that access
 * fields of a mbedtls_ecdh_context structure directly. See also
 * MBEDTLS_ECDH_LEGACY_CONTEXT in include/mbedtls/ecdh.h.
 */
//#define MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED

/* \} name SECTION: Customisation configuration options */

/* Target and application specific configurations
 *
 * Allow user to override any previous default.
 *
 */
#if defined(MBEDTLS_USER_CONFIG_FILE)
#include MBEDTLS_USER_CONFIG_FILE
#endif

#if defined(MBEDTLS_PSA_CRYPTO_CONFIG)

#endif



#endif /* MBEDTLS_CONFIG_H */


/********* Start of file include/mbedtls/check_config.h ************/

/**
 * \file check_config.h
 *
 * \brief Consistency checks for configuration options
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/*
 * It is recommended to include this file from your config.h
 * in order to catch dependency issues early.
 */

#ifndef MBEDTLS_CHECK_CONFIG_H
#define MBEDTLS_CHECK_CONFIG_H

/*
 * We assume CHAR_BIT is 8 in many places. In practice, this is true on our
 * target platforms, so not an issue, but let's just be extra sure.
 */
#include <limits.h>
#if CHAR_BIT != 8
#error "mbed TLS requires a platform with 8-bit chars"
#endif

#if defined(_WIN32)
#if !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_C is required on Windows"
#endif

/* Fix the config here. Not convenient to put an #ifdef _WIN32 in config.h as
 * it would confuse config.py. */
#if !defined(MBEDTLS_PLATFORM_SNPRINTF_ALT) && \
    !defined(MBEDTLS_PLATFORM_SNPRINTF_MACRO)
#define MBEDTLS_PLATFORM_SNPRINTF_ALT
#endif

#if !defined(MBEDTLS_PLATFORM_VSNPRINTF_ALT) && \
    !defined(MBEDTLS_PLATFORM_VSNPRINTF_MACRO)
#define MBEDTLS_PLATFORM_VSNPRINTF_ALT
#endif
#endif /* _WIN32 */

#if defined(TARGET_LIKE_MBED) && defined(MBEDTLS_NET_C)
#error "The NET module is not available for mbed OS - please use the network functions provided by Mbed OS"
#endif

#if defined(MBEDTLS_DEPRECATED_WARNING) && \
    !defined(__GNUC__) && !defined(__clang__)
#error "MBEDTLS_DEPRECATED_WARNING only works with GCC and Clang"
#endif

#if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_HAVE_TIME)
#error "MBEDTLS_HAVE_TIME_DATE without MBEDTLS_HAVE_TIME does not make sense"
#endif

#if defined(MBEDTLS_AESNI_C) && !defined(MBEDTLS_HAVE_ASM)
#error "MBEDTLS_AESNI_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_CTR_DRBG_C) && !defined(MBEDTLS_AES_C)
#error "MBEDTLS_CTR_DRBG_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_DHM_C) && !defined(MBEDTLS_BIGNUM_C)
#error "MBEDTLS_DHM_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT) && !defined(MBEDTLS_SSL_TRUNCATED_HMAC)
#error "MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_CMAC_C) && \
    !defined(MBEDTLS_AES_C) && !defined(MBEDTLS_DES_C)
#error "MBEDTLS_CMAC_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_NIST_KW_C) && \
    ( !defined(MBEDTLS_AES_C) || !defined(MBEDTLS_CIPHER_C) )
#error "MBEDTLS_NIST_KW_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECDH_C) && !defined(MBEDTLS_ECP_C)
#error "MBEDTLS_ECDH_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECDSA_C) &&            \
    ( !defined(MBEDTLS_ECP_C) ||           \
      !( defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED) || \
         defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED) || \
         defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED) || \
         defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED) || \
         defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED) || \
         defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED) || \
         defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED) || \
         defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED) || \
         defined(MBEDTLS_ECP_DP_BP256R1_ENABLED) ||   \
         defined(MBEDTLS_ECP_DP_BP384R1_ENABLED) ||   \
         defined(MBEDTLS_ECP_DP_BP512R1_ENABLED) ) || \
      !defined(MBEDTLS_ASN1_PARSE_C) ||    \
      !defined(MBEDTLS_ASN1_WRITE_C) )
#error "MBEDTLS_ECDSA_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECJPAKE_C) &&           \
    ( !defined(MBEDTLS_ECP_C) || !defined(MBEDTLS_MD_C) )
#error "MBEDTLS_ECJPAKE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_RESTARTABLE)           && \
    ( defined(MBEDTLS_USE_PSA_CRYPTO)          || \
      defined(MBEDTLS_ECDH_COMPUTE_SHARED_ALT) || \
      defined(MBEDTLS_ECDH_GEN_PUBLIC_ALT)     || \
      defined(MBEDTLS_ECDSA_SIGN_ALT)          || \
      defined(MBEDTLS_ECDSA_VERIFY_ALT)        || \
      defined(MBEDTLS_ECDSA_GENKEY_ALT)        || \
      defined(MBEDTLS_ECP_INTERNAL_ALT)        || \
      defined(MBEDTLS_ECP_ALT) )
#error "MBEDTLS_ECP_RESTARTABLE defined, but it cannot coexist with an alternative or PSA-based ECP implementation"
#endif

#if defined(MBEDTLS_ECP_RESTARTABLE)           && \
    ! defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
#error "MBEDTLS_ECP_RESTARTABLE defined, but not MBEDTLS_ECDH_LEGACY_CONTEXT"
#endif

#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)           && \
    defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
#error "MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED defined, but MBEDTLS_ECDH_LEGACY_CONTEXT not disabled"
#endif

#if defined(MBEDTLS_ECDSA_DETERMINISTIC) && !defined(MBEDTLS_HMAC_DRBG_C)
#error "MBEDTLS_ECDSA_DETERMINISTIC defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_C) && ( !defined(MBEDTLS_BIGNUM_C) || (    \
    !defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED) &&                  \
    !defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED) &&                  \
    !defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED) &&                  \
    !defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED) &&                  \
    !defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED) &&                  \
    !defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)   &&                  \
    !defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)   &&                  \
    !defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)   &&                  \
    !defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED) &&                  \
    !defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED) &&                  \
    !defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED) &&                  \
    !defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED) &&                 \
    !defined(MBEDTLS_ECP_DP_CURVE448_ENABLED) ) )
#error "MBEDTLS_ECP_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_C) && !(            \
    defined(MBEDTLS_ECP_ALT) ||             \
    defined(MBEDTLS_CTR_DRBG_C) ||          \
    defined(MBEDTLS_HMAC_DRBG_C) ||         \
    defined(MBEDTLS_ECP_NO_INTERNAL_RNG))
#error "MBEDTLS_ECP_C requires a DRBG module unless MBEDTLS_ECP_NO_INTERNAL_RNG is defined or an alternative implementation is used"
#endif

#if defined(MBEDTLS_PK_PARSE_C) && !defined(MBEDTLS_ASN1_PARSE_C)
#error "MBEDTLS_PK_PARSE_C defined, but not all prerequesites"
#endif

#if defined(MBEDTLS_ENTROPY_C) && (!defined(MBEDTLS_SHA512_C) &&      \
                                    !defined(MBEDTLS_SHA256_C))
#error "MBEDTLS_ENTROPY_C defined, but not all prerequisites"
#endif
#if defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_SHA512_C) &&         \
    defined(MBEDTLS_CTR_DRBG_ENTROPY_LEN) && (MBEDTLS_CTR_DRBG_ENTROPY_LEN > 64)
#error "MBEDTLS_CTR_DRBG_ENTROPY_LEN value too high"
#endif
#if defined(MBEDTLS_ENTROPY_C) &&                                            \
    ( !defined(MBEDTLS_SHA512_C) || defined(MBEDTLS_ENTROPY_FORCE_SHA256) ) \
    && defined(MBEDTLS_CTR_DRBG_ENTROPY_LEN) && (MBEDTLS_CTR_DRBG_ENTROPY_LEN > 32)
#error "MBEDTLS_CTR_DRBG_ENTROPY_LEN value too high"
#endif
#if defined(MBEDTLS_ENTROPY_C) && \
    defined(MBEDTLS_ENTROPY_FORCE_SHA256) && !defined(MBEDTLS_SHA256_C)
#error "MBEDTLS_ENTROPY_FORCE_SHA256 defined, but not all prerequisites"
#endif

#if defined(__has_feature)
#if __has_feature(memory_sanitizer)
#define MBEDTLS_HAS_MEMSAN
#endif
#endif
#if defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN) &&  !defined(MBEDTLS_HAS_MEMSAN)
#error "MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN requires building with MemorySanitizer"
#endif
#undef MBEDTLS_HAS_MEMSAN

#if defined(MBEDTLS_TEST_NULL_ENTROPY) && \
    ( !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES) )
#error "MBEDTLS_TEST_NULL_ENTROPY defined, but not all prerequisites"
#endif
#if defined(MBEDTLS_TEST_NULL_ENTROPY) && \
     ( defined(MBEDTLS_ENTROPY_NV_SEED) || defined(MBEDTLS_ENTROPY_HARDWARE_ALT) || \
    defined(MBEDTLS_HAVEGE_C) )
#error "MBEDTLS_TEST_NULL_ENTROPY defined, but entropy sources too"
#endif

#if defined(MBEDTLS_GCM_C) && (                                        \
        !defined(MBEDTLS_AES_C) && !defined(MBEDTLS_CAMELLIA_C) && !defined(MBEDTLS_ARIA_C) )
#error "MBEDTLS_GCM_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_RANDOMIZE_JAC_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_RANDOMIZE_JAC_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_ADD_MIXED_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_ADD_MIXED_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_DOUBLE_JAC_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_DOUBLE_JAC_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_NORMALIZE_JAC_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_NORMALIZE_JAC_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_RANDOMIZE_MXZ_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_RANDOMIZE_MXZ_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_NORMALIZE_MXZ_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_NORMALIZE_MXZ_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ECP_NO_FALLBACK) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
#error "MBEDTLS_ECP_NO_FALLBACK defined, but no alternative implementation enabled"
#endif

#if defined(MBEDTLS_HAVEGE_C) && !defined(MBEDTLS_TIMING_C)
#error "MBEDTLS_HAVEGE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_HKDF_C) && !defined(MBEDTLS_MD_C)
#error "MBEDTLS_HKDF_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_HMAC_DRBG_C) && !defined(MBEDTLS_MD_C)
#error "MBEDTLS_HMAC_DRBG_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED) &&                 \
    ( !defined(MBEDTLS_ECDH_C) || !defined(MBEDTLS_ECDSA_C) ||          \
      !defined(MBEDTLS_X509_CRT_PARSE_C) )
#error "MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) &&                 \
    ( !defined(MBEDTLS_ECDH_C) || !defined(MBEDTLS_RSA_C) ||          \
      !defined(MBEDTLS_X509_CRT_PARSE_C) )
#error "MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED) && !defined(MBEDTLS_DHM_C)
#error "MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) &&                     \
    !defined(MBEDTLS_ECDH_C)
#error "MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) &&                   \
    ( !defined(MBEDTLS_DHM_C) || !defined(MBEDTLS_RSA_C) ||           \
      !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_PKCS1_V15) )
#error "MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) &&                 \
    ( !defined(MBEDTLS_ECDH_C) || !defined(MBEDTLS_RSA_C) ||          \
      !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_PKCS1_V15) )
#error "MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) &&                 \
    ( !defined(MBEDTLS_ECDH_C) || !defined(MBEDTLS_ECDSA_C) ||          \
      !defined(MBEDTLS_X509_CRT_PARSE_C) )
#error "MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) &&                   \
    ( !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \
      !defined(MBEDTLS_PKCS1_V15) )
#error "MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) &&                       \
    ( !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \
      !defined(MBEDTLS_PKCS1_V15) )
#error "MBEDTLS_KEY_EXCHANGE_RSA_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) &&                    \
    ( !defined(MBEDTLS_ECJPAKE_C) || !defined(MBEDTLS_SHA256_C) ||      \
      !defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED) )
#error "MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) &&        \
    !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) &&              \
    ( !defined(MBEDTLS_SHA256_C) &&                             \
      !defined(MBEDTLS_SHA512_C) &&                             \
      !defined(MBEDTLS_SHA1_C) )
#error "!MBEDTLS_SSL_KEEP_PEER_CERTIFICATE requires MBEDTLS_SHA512_C, MBEDTLS_SHA256_C or MBEDTLS_SHA1_C"
#endif

#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C) &&                          \
    ( !defined(MBEDTLS_PLATFORM_C) || !defined(MBEDTLS_PLATFORM_MEMORY) )
#error "MBEDTLS_MEMORY_BUFFER_ALLOC_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_MEMORY_BACKTRACE) && !defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
#error "MBEDTLS_MEMORY_BACKTRACE defined, but not all prerequesites"
#endif

#if defined(MBEDTLS_MEMORY_DEBUG) && !defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
#error "MBEDTLS_MEMORY_DEBUG defined, but not all prerequesites"
#endif

#if defined(MBEDTLS_PADLOCK_C) && !defined(MBEDTLS_HAVE_ASM)
#error "MBEDTLS_PADLOCK_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PEM_PARSE_C) && !defined(MBEDTLS_BASE64_C)
#error "MBEDTLS_PEM_PARSE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PEM_WRITE_C) && !defined(MBEDTLS_BASE64_C)
#error "MBEDTLS_PEM_WRITE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PK_C) && \
    ( !defined(MBEDTLS_RSA_C) && !defined(MBEDTLS_ECP_C) )
#error "MBEDTLS_PK_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PK_PARSE_C) && !defined(MBEDTLS_PK_C)
#error "MBEDTLS_PK_PARSE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PK_WRITE_C) && !defined(MBEDTLS_PK_C)
#error "MBEDTLS_PK_WRITE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PKCS11_C) && !defined(MBEDTLS_PK_C)
#error "MBEDTLS_PKCS11_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PKCS11_C)
#if defined(MBEDTLS_DEPRECATED_REMOVED)
#error "MBEDTLS_PKCS11_C is deprecated and will be removed in a future version of Mbed TLS"
#elif defined(MBEDTLS_DEPRECATED_WARNING)
#warning "MBEDTLS_PKCS11_C is deprecated and will be removed in a future version of Mbed TLS"
#endif
#endif /* MBEDTLS_PKCS11_C */

#if defined(MBEDTLS_PLATFORM_EXIT_ALT) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_EXIT_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_EXIT_MACRO) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_EXIT_MACRO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_EXIT_MACRO) &&\
    ( defined(MBEDTLS_PLATFORM_STD_EXIT) ||\
        defined(MBEDTLS_PLATFORM_EXIT_ALT) )
#error "MBEDTLS_PLATFORM_EXIT_MACRO and MBEDTLS_PLATFORM_STD_EXIT/MBEDTLS_PLATFORM_EXIT_ALT cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_TIME_ALT) &&\
    ( !defined(MBEDTLS_PLATFORM_C) ||\
        !defined(MBEDTLS_HAVE_TIME) )
#error "MBEDTLS_PLATFORM_TIME_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_TIME_MACRO) &&\
    ( !defined(MBEDTLS_PLATFORM_C) ||\
        !defined(MBEDTLS_HAVE_TIME) )
#error "MBEDTLS_PLATFORM_TIME_MACRO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_TIME_TYPE_MACRO) &&\
    ( !defined(MBEDTLS_PLATFORM_C) ||\
        !defined(MBEDTLS_HAVE_TIME) )
#error "MBEDTLS_PLATFORM_TIME_TYPE_MACRO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_TIME_MACRO) &&\
    ( defined(MBEDTLS_PLATFORM_STD_TIME) ||\
        defined(MBEDTLS_PLATFORM_TIME_ALT) )
#error "MBEDTLS_PLATFORM_TIME_MACRO and MBEDTLS_PLATFORM_STD_TIME/MBEDTLS_PLATFORM_TIME_ALT cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_TIME_TYPE_MACRO) &&\
    ( defined(MBEDTLS_PLATFORM_STD_TIME) ||\
        defined(MBEDTLS_PLATFORM_TIME_ALT) )
#error "MBEDTLS_PLATFORM_TIME_TYPE_MACRO and MBEDTLS_PLATFORM_STD_TIME/MBEDTLS_PLATFORM_TIME_ALT cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_FPRINTF_ALT) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_FPRINTF_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_FPRINTF_MACRO) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_FPRINTF_MACRO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_FPRINTF_MACRO) &&\
    ( defined(MBEDTLS_PLATFORM_STD_FPRINTF) ||\
        defined(MBEDTLS_PLATFORM_FPRINTF_ALT) )
#error "MBEDTLS_PLATFORM_FPRINTF_MACRO and MBEDTLS_PLATFORM_STD_FPRINTF/MBEDTLS_PLATFORM_FPRINTF_ALT cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_FREE_MACRO) &&\
    ( !defined(MBEDTLS_PLATFORM_C) || !defined(MBEDTLS_PLATFORM_MEMORY) )
#error "MBEDTLS_PLATFORM_FREE_MACRO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_FREE_MACRO) &&\
    defined(MBEDTLS_PLATFORM_STD_FREE)
#error "MBEDTLS_PLATFORM_FREE_MACRO and MBEDTLS_PLATFORM_STD_FREE cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_FREE_MACRO) && !defined(MBEDTLS_PLATFORM_CALLOC_MACRO)
#error "MBEDTLS_PLATFORM_CALLOC_MACRO must be defined if MBEDTLS_PLATFORM_FREE_MACRO is"
#endif

#if defined(MBEDTLS_PLATFORM_CALLOC_MACRO) &&\
    ( !defined(MBEDTLS_PLATFORM_C) || !defined(MBEDTLS_PLATFORM_MEMORY) )
#error "MBEDTLS_PLATFORM_CALLOC_MACRO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_CALLOC_MACRO) &&\
    defined(MBEDTLS_PLATFORM_STD_CALLOC)
#error "MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_STD_CALLOC cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_CALLOC_MACRO) && !defined(MBEDTLS_PLATFORM_FREE_MACRO)
#error "MBEDTLS_PLATFORM_FREE_MACRO must be defined if MBEDTLS_PLATFORM_CALLOC_MACRO is"
#endif

#if defined(MBEDTLS_PLATFORM_MEMORY) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_MEMORY defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_PRINTF_ALT) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_PRINTF_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_PRINTF_MACRO) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_PRINTF_MACRO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_PRINTF_MACRO) &&\
    ( defined(MBEDTLS_PLATFORM_STD_PRINTF) ||\
        defined(MBEDTLS_PLATFORM_PRINTF_ALT) )
#error "MBEDTLS_PLATFORM_PRINTF_MACRO and MBEDTLS_PLATFORM_STD_PRINTF/MBEDTLS_PLATFORM_PRINTF_ALT cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_SNPRINTF_ALT) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_SNPRINTF_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_SNPRINTF_MACRO) && !defined(MBEDTLS_PLATFORM_C)
#error "MBEDTLS_PLATFORM_SNPRINTF_MACRO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_SNPRINTF_MACRO) &&\
    ( defined(MBEDTLS_PLATFORM_STD_SNPRINTF) ||\
        defined(MBEDTLS_PLATFORM_SNPRINTF_ALT) )
#error "MBEDTLS_PLATFORM_SNPRINTF_MACRO and MBEDTLS_PLATFORM_STD_SNPRINTF/MBEDTLS_PLATFORM_SNPRINTF_ALT cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_STD_MEM_HDR) &&\
    !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS)
#error "MBEDTLS_PLATFORM_STD_MEM_HDR defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_CALLOC) && !defined(MBEDTLS_PLATFORM_MEMORY)
#error "MBEDTLS_PLATFORM_STD_CALLOC defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_FREE) && !defined(MBEDTLS_PLATFORM_MEMORY)
#error "MBEDTLS_PLATFORM_STD_FREE defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_EXIT) &&\
    !defined(MBEDTLS_PLATFORM_EXIT_ALT)
#error "MBEDTLS_PLATFORM_STD_EXIT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_TIME) &&\
    ( !defined(MBEDTLS_PLATFORM_TIME_ALT) ||\
        !defined(MBEDTLS_HAVE_TIME) )
#error "MBEDTLS_PLATFORM_STD_TIME defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_FPRINTF) &&\
    !defined(MBEDTLS_PLATFORM_FPRINTF_ALT)
#error "MBEDTLS_PLATFORM_STD_FPRINTF defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_PRINTF) &&\
    !defined(MBEDTLS_PLATFORM_PRINTF_ALT)
#error "MBEDTLS_PLATFORM_STD_PRINTF defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_SNPRINTF) &&\
    !defined(MBEDTLS_PLATFORM_SNPRINTF_ALT)
#error "MBEDTLS_PLATFORM_STD_SNPRINTF defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_ENTROPY_NV_SEED) &&\
    ( !defined(MBEDTLS_PLATFORM_C) || !defined(MBEDTLS_ENTROPY_C) )
#error "MBEDTLS_ENTROPY_NV_SEED defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_NV_SEED_ALT) &&\
    !defined(MBEDTLS_ENTROPY_NV_SEED)
#error "MBEDTLS_PLATFORM_NV_SEED_ALT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ) &&\
    !defined(MBEDTLS_PLATFORM_NV_SEED_ALT)
#error "MBEDTLS_PLATFORM_STD_NV_SEED_READ defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE) &&\
    !defined(MBEDTLS_PLATFORM_NV_SEED_ALT)
#error "MBEDTLS_PLATFORM_STD_NV_SEED_WRITE defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PLATFORM_NV_SEED_READ_MACRO) &&\
    ( defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ) ||\
      defined(MBEDTLS_PLATFORM_NV_SEED_ALT) )
#error "MBEDTLS_PLATFORM_NV_SEED_READ_MACRO and MBEDTLS_PLATFORM_STD_NV_SEED_READ cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO) &&\
    ( defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE) ||\
      defined(MBEDTLS_PLATFORM_NV_SEED_ALT) )
#error "MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO and MBEDTLS_PLATFORM_STD_NV_SEED_WRITE cannot be defined simultaneously"
#endif

#if defined(MBEDTLS_PSA_CRYPTO_C) &&                                    \
    !( ( ( defined(MBEDTLS_CTR_DRBG_C) || defined(MBEDTLS_HMAC_DRBG_C) ) && \
         defined(MBEDTLS_ENTROPY_C) ) ||                                \
       defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG) )
#error "MBEDTLS_PSA_CRYPTO_C defined, but not all prerequisites (missing RNG)"
#endif

#if defined(MBEDTLS_PSA_CRYPTO_SPM) && !defined(MBEDTLS_PSA_CRYPTO_C)
#error "MBEDTLS_PSA_CRYPTO_SPM defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PSA_CRYPTO_SE_C) &&    \
    ! ( defined(MBEDTLS_PSA_CRYPTO_C) && \
        defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) )
#error "MBEDTLS_PSA_CRYPTO_SE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) &&            \
    ! defined(MBEDTLS_PSA_CRYPTO_C)
#error "MBEDTLS_PSA_CRYPTO_STORAGE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PSA_INJECT_ENTROPY) &&      \
    !( defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) && \
       defined(MBEDTLS_ENTROPY_NV_SEED) )
#error "MBEDTLS_PSA_INJECT_ENTROPY defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PSA_INJECT_ENTROPY) &&              \
    !defined(MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES)
#error "MBEDTLS_PSA_INJECT_ENTROPY is not compatible with actual entropy sources"
#endif

#if defined(MBEDTLS_PSA_INJECT_ENTROPY) &&              \
    defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
#error "MBEDTLS_PSA_INJECT_ENTROPY is not compatible with MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG"
#endif

#if defined(MBEDTLS_PSA_ITS_FILE_C) && \
    !defined(MBEDTLS_FS_IO)
#error "MBEDTLS_PSA_ITS_FILE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER) && \
    defined(MBEDTLS_USE_PSA_CRYPTO)
#error "MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER defined, but it cannot coexist with MBEDTLS_USE_PSA_CRYPTO."
#endif

#if defined(MBEDTLS_RSA_C) && ( !defined(MBEDTLS_BIGNUM_C) ||         \
    !defined(MBEDTLS_OID_C) )
#error "MBEDTLS_RSA_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_RSA_C) && ( !defined(MBEDTLS_PKCS1_V21) &&         \
    !defined(MBEDTLS_PKCS1_V15) )
#error "MBEDTLS_RSA_C defined, but none of the PKCS1 versions enabled"
#endif

#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT) &&                        \
    ( !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_PKCS1_V21) )
#error "MBEDTLS_X509_RSASSA_PSS_SUPPORT defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SHA512_NO_SHA384) && !defined(MBEDTLS_SHA512_C)
#error "MBEDTLS_SHA512_NO_SHA384 defined without MBEDTLS_SHA512_C"
#endif

#if defined(MBEDTLS_SSL_PROTO_SSL3) && ( !defined(MBEDTLS_MD5_C) ||     \
    !defined(MBEDTLS_SHA1_C) )
#error "MBEDTLS_SSL_PROTO_SSL3 defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_PROTO_TLS1) && ( !defined(MBEDTLS_MD5_C) ||     \
    !defined(MBEDTLS_SHA1_C) )
#error "MBEDTLS_SSL_PROTO_TLS1 defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_PROTO_TLS1_1) && ( !defined(MBEDTLS_MD5_C) ||     \
    !defined(MBEDTLS_SHA1_C) )
#error "MBEDTLS_SSL_PROTO_TLS1_1 defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && ( !defined(MBEDTLS_SHA1_C) &&     \
    !defined(MBEDTLS_SHA256_C) && !defined(MBEDTLS_SHA512_C) )
#error "MBEDTLS_SSL_PROTO_TLS1_2 defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL) && ( !defined(MBEDTLS_HKDF_C) && \
    !defined(MBEDTLS_SHA256_C) && !defined(MBEDTLS_SHA512_C) )
#error "MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL defined, but not all prerequisites"
#endif

#if (defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) ||  \
     defined(MBEDTLS_SSL_PROTO_TLS1_1) || defined(MBEDTLS_SSL_PROTO_TLS1_2)) && \
    !(defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) ||                          \
      defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) ||                      \
      defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) ||                    \
      defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) ||                  \
      defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||                     \
      defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED) ||                   \
      defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED) ||                          \
      defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED) ||                      \
      defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) ||                      \
      defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) ||                    \
      defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) )
#error "One or more versions of the TLS protocol are enabled " \
        "but no key exchange methods defined with MBEDTLS_KEY_EXCHANGE_xxxx"
#endif

#if defined(MBEDTLS_SSL_PROTO_DTLS)     && \
    !defined(MBEDTLS_SSL_PROTO_TLS1_1)  && \
    !defined(MBEDTLS_SSL_PROTO_TLS1_2)
#error "MBEDTLS_SSL_PROTO_DTLS defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_CLI_C) && !defined(MBEDTLS_SSL_TLS_C)
#error "MBEDTLS_SSL_CLI_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_TLS_C) && ( !defined(MBEDTLS_CIPHER_C) ||     \
    !defined(MBEDTLS_MD_C) )
#error "MBEDTLS_SSL_TLS_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_SRV_C) && !defined(MBEDTLS_SSL_TLS_C)
#error "MBEDTLS_SSL_SRV_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_TLS_C) && (!defined(MBEDTLS_SSL_PROTO_SSL3) && \
    !defined(MBEDTLS_SSL_PROTO_TLS1) && !defined(MBEDTLS_SSL_PROTO_TLS1_1) && \
    !defined(MBEDTLS_SSL_PROTO_TLS1_2))
#error "MBEDTLS_SSL_TLS_C defined, but no protocols are active"
#endif

#if defined(MBEDTLS_SSL_TLS_C) && (defined(MBEDTLS_SSL_PROTO_SSL3) && \
    defined(MBEDTLS_SSL_PROTO_TLS1_1) && !defined(MBEDTLS_SSL_PROTO_TLS1))
#error "Illegal protocol selection"
#endif

#if defined(MBEDTLS_SSL_TLS_C) && (defined(MBEDTLS_SSL_PROTO_TLS1) && \
    defined(MBEDTLS_SSL_PROTO_TLS1_2) && !defined(MBEDTLS_SSL_PROTO_TLS1_1))
#error "Illegal protocol selection"
#endif

#if defined(MBEDTLS_SSL_TLS_C) && (defined(MBEDTLS_SSL_PROTO_SSL3) && \
    defined(MBEDTLS_SSL_PROTO_TLS1_2) && (!defined(MBEDTLS_SSL_PROTO_TLS1) || \
    !defined(MBEDTLS_SSL_PROTO_TLS1_1)))
#error "Illegal protocol selection"
#endif

#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && !defined(MBEDTLS_SSL_PROTO_DTLS)
#error "MBEDTLS_SSL_DTLS_HELLO_VERIFY  defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && \
    !defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
#error "MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE  defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) &&                              \
    ( !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_PROTO_DTLS) )
#error "MBEDTLS_SSL_DTLS_ANTI_REPLAY  defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) &&                              \
    ( !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_PROTO_DTLS) )
#error "MBEDTLS_SSL_DTLS_CONNECTION_ID  defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)            &&                 \
    defined(MBEDTLS_SSL_CID_IN_LEN_MAX) &&                 \
    MBEDTLS_SSL_CID_IN_LEN_MAX > 255
#error "MBEDTLS_SSL_CID_IN_LEN_MAX too large (max 255)"
#endif

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)            &&                  \
    defined(MBEDTLS_SSL_CID_OUT_LEN_MAX) &&                 \
    MBEDTLS_SSL_CID_OUT_LEN_MAX > 255
#error "MBEDTLS_SSL_CID_OUT_LEN_MAX too large (max 255)"
#endif

#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT) &&                              \
    ( !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_PROTO_DTLS) )
#error "MBEDTLS_SSL_DTLS_BADMAC_LIMIT  defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) &&   \
    !defined(MBEDTLS_SSL_PROTO_TLS1)   &&      \
    !defined(MBEDTLS_SSL_PROTO_TLS1_1) &&      \
    !defined(MBEDTLS_SSL_PROTO_TLS1_2)
#error "MBEDTLS_SSL_ENCRYPT_THEN_MAC defined, but not all prerequsites"
#endif

#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) && \
    !defined(MBEDTLS_SSL_PROTO_TLS1)   &&          \
    !defined(MBEDTLS_SSL_PROTO_TLS1_1) &&          \
    !defined(MBEDTLS_SSL_PROTO_TLS1_2)
#error "MBEDTLS_SSL_EXTENDED_MASTER_SECRET defined, but not all prerequsites"
#endif

#if defined(MBEDTLS_SSL_TICKET_C) && !defined(MBEDTLS_CIPHER_C)
#error "MBEDTLS_SSL_TICKET_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING) && \
    !defined(MBEDTLS_SSL_PROTO_SSL3) && !defined(MBEDTLS_SSL_PROTO_TLS1)
#error "MBEDTLS_SSL_CBC_RECORD_SPLITTING defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) && \
        !defined(MBEDTLS_X509_CRT_PARSE_C)
#error "MBEDTLS_SSL_SERVER_NAME_INDICATION defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_THREADING_PTHREAD)
#if !defined(MBEDTLS_THREADING_C) || defined(MBEDTLS_THREADING_IMPL)
#error "MBEDTLS_THREADING_PTHREAD defined, but not all prerequisites"
#endif
#define MBEDTLS_THREADING_IMPL
#endif

#if defined(MBEDTLS_THREADING_ALT)
#if !defined(MBEDTLS_THREADING_C) || defined(MBEDTLS_THREADING_IMPL)
#error "MBEDTLS_THREADING_ALT defined, but not all prerequisites"
#endif
#define MBEDTLS_THREADING_IMPL
#endif

#if defined(MBEDTLS_THREADING_C) && !defined(MBEDTLS_THREADING_IMPL)
#error "MBEDTLS_THREADING_C defined, single threading implementation required"
#endif
#undef MBEDTLS_THREADING_IMPL

#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_PSA_CRYPTO_C)
#error "MBEDTLS_USE_PSA_CRYPTO defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_VERSION_FEATURES) && !defined(MBEDTLS_VERSION_C)
#error "MBEDTLS_VERSION_FEATURES defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_X509_USE_C) && ( !defined(MBEDTLS_BIGNUM_C) ||  \
    !defined(MBEDTLS_OID_C) || !defined(MBEDTLS_ASN1_PARSE_C) ||      \
    !defined(MBEDTLS_PK_PARSE_C) )
#error "MBEDTLS_X509_USE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_X509_CREATE_C) && ( !defined(MBEDTLS_BIGNUM_C) ||  \
    !defined(MBEDTLS_OID_C) || !defined(MBEDTLS_ASN1_WRITE_C) ||       \
    !defined(MBEDTLS_PK_WRITE_C) )
#error "MBEDTLS_X509_CREATE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_CERTS_C) && !defined(MBEDTLS_X509_USE_C)
#error "MBEDTLS_CERTS_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_X509_CRT_PARSE_C) && ( !defined(MBEDTLS_X509_USE_C) )
#error "MBEDTLS_X509_CRT_PARSE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_X509_CRL_PARSE_C) && ( !defined(MBEDTLS_X509_USE_C) )
#error "MBEDTLS_X509_CRL_PARSE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_X509_CSR_PARSE_C) && ( !defined(MBEDTLS_X509_USE_C) )
#error "MBEDTLS_X509_CSR_PARSE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_X509_CRT_WRITE_C) && ( !defined(MBEDTLS_X509_CREATE_C) )
#error "MBEDTLS_X509_CRT_WRITE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_X509_CSR_WRITE_C) && ( !defined(MBEDTLS_X509_CREATE_C) )
#error "MBEDTLS_X509_CSR_WRITE_C defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_HAVE_INT32) && defined(MBEDTLS_HAVE_INT64)
#error "MBEDTLS_HAVE_INT32 and MBEDTLS_HAVE_INT64 cannot be defined simultaneously"
#endif /* MBEDTLS_HAVE_INT32 && MBEDTLS_HAVE_INT64 */

#if ( defined(MBEDTLS_HAVE_INT32) || defined(MBEDTLS_HAVE_INT64) ) && \
    defined(MBEDTLS_HAVE_ASM)
#error "MBEDTLS_HAVE_INT32/MBEDTLS_HAVE_INT64 and MBEDTLS_HAVE_ASM cannot be defined simultaneously"
#endif /* (MBEDTLS_HAVE_INT32 || MBEDTLS_HAVE_INT64) && MBEDTLS_HAVE_ASM */

#if defined(MBEDTLS_SSL_PROTO_SSL3)
#if defined(MBEDTLS_DEPRECATED_REMOVED)
#error "MBEDTLS_SSL_PROTO_SSL3 is deprecated and will be removed in a future version of Mbed TLS"
#elif defined(MBEDTLS_DEPRECATED_WARNING)
#warning "MBEDTLS_SSL_PROTO_SSL3 is deprecated and will be removed in a future version of Mbed TLS"
#endif
#endif /* MBEDTLS_SSL_PROTO_SSL3 */

#if defined(MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO)
#if defined(MBEDTLS_DEPRECATED_REMOVED)
#error "MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is deprecated and will be removed in a future version of Mbed TLS"
#elif defined(MBEDTLS_DEPRECATED_WARNING)
#warning "MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is deprecated and will be removed in a future version of Mbed TLS"
#endif
#endif /* MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO */

#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
#if defined(MBEDTLS_DEPRECATED_REMOVED)
#error "MBEDTLS_SSL_HW_RECORD_ACCEL is deprecated and will be removed in a future version of Mbed TLS"
#elif defined(MBEDTLS_DEPRECATED_WARNING)
#warning "MBEDTLS_SSL_HW_RECORD_ACCEL is deprecated and will be removed in a future version of Mbed TLS"
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */

#if defined(MBEDTLS_SSL_DTLS_SRTP) && ( !defined(MBEDTLS_SSL_PROTO_DTLS) )
#error "MBEDTLS_SSL_DTLS_SRTP defined, but not all prerequisites"
#endif

#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) && ( !defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) )
#error "MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH defined, but not all prerequisites"
#endif

/*
 * Avoid warning from -pedantic. This is a convenient place for this
 * workaround since this is included by every single file before the
 * #if defined(MBEDTLS_xxx_C) that results in empty translation units.
 */
typedef int mbedtls_iso_c_forbids_empty_translation_units;

#endif /* MBEDTLS_CHECK_CONFIG_H */


/********* Start of file include/mbedtls/platform.h ************/

/**
 * \file platform.h
 *
 * \brief This file contains the definitions and functions of the
 *        Mbed TLS platform abstraction layer.
 *
 *        The platform abstraction layer removes the need for the library
 *        to directly link to standard C library functions or operating
 *        system services, making the library easier to port and embed.
 *        Application developers and users of the library can provide their own
 *        implementations of these functions, or implementations specific to
 *        their platform, which can be statically linked to the library or
 *        dynamically configured at runtime.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_PLATFORM_H
#define MBEDTLS_PLATFORM_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#if defined(MBEDTLS_HAVE_TIME)

#endif

/** Hardware accelerator failed */
#define MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED     -0x0070
/** The requested feature is not supported by the platform */
#define MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED -0x0072

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */

/* The older Microsoft Windows common runtime provides non-conforming
 * implementations of some standard library functions, including snprintf
 * and vsnprintf. This affects MSVC and MinGW builds.
 */
#if defined(__MINGW32__) || (defined(_MSC_VER) && _MSC_VER <= 1900)
#define MBEDTLS_PLATFORM_HAS_NON_CONFORMING_SNPRINTF
#define MBEDTLS_PLATFORM_HAS_NON_CONFORMING_VSNPRINTF
#endif

#if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS)
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#if !defined(MBEDTLS_PLATFORM_STD_SNPRINTF)
#if defined(MBEDTLS_PLATFORM_HAS_NON_CONFORMING_SNPRINTF)
#define MBEDTLS_PLATFORM_STD_SNPRINTF   mbedtls_platform_win32_snprintf /**< The default \c snprintf function to use.  */
#else
#define MBEDTLS_PLATFORM_STD_SNPRINTF   snprintf /**< The default \c snprintf function to use.  */
#endif
#endif
#if !defined(MBEDTLS_PLATFORM_STD_VSNPRINTF)
#if defined(MBEDTLS_PLATFORM_HAS_NON_CONFORMING_VSNPRINTF)
#define MBEDTLS_PLATFORM_STD_VSNPRINTF   mbedtls_platform_win32_vsnprintf /**< The default \c vsnprintf function to use.  */
#else
#define MBEDTLS_PLATFORM_STD_VSNPRINTF   vsnprintf /**< The default \c vsnprintf function to use.  */
#endif
#endif
#if !defined(MBEDTLS_PLATFORM_STD_PRINTF)
#define MBEDTLS_PLATFORM_STD_PRINTF   printf /**< The default \c printf function to use. */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_FPRINTF)
#define MBEDTLS_PLATFORM_STD_FPRINTF fprintf /**< The default \c fprintf function to use. */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_CALLOC)
#define MBEDTLS_PLATFORM_STD_CALLOC   calloc /**< The default \c calloc function to use. */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_FREE)
#define MBEDTLS_PLATFORM_STD_FREE       free /**< The default \c free function to use. */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_EXIT)
#define MBEDTLS_PLATFORM_STD_EXIT      exit /**< The default \c exit function to use. */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_TIME)
#define MBEDTLS_PLATFORM_STD_TIME       time    /**< The default \c time function to use. */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_EXIT_SUCCESS)
#define MBEDTLS_PLATFORM_STD_EXIT_SUCCESS  EXIT_SUCCESS /**< The default exit value to use. */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_EXIT_FAILURE)
#define MBEDTLS_PLATFORM_STD_EXIT_FAILURE  EXIT_FAILURE /**< The default exit value to use. */
#endif
#if defined(MBEDTLS_FS_IO)
#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ)
#define MBEDTLS_PLATFORM_STD_NV_SEED_READ   mbedtls_platform_std_nv_seed_read
#endif
#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE)
#define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE  mbedtls_platform_std_nv_seed_write
#endif
#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_FILE)
#define MBEDTLS_PLATFORM_STD_NV_SEED_FILE   "seedfile"
#endif
#endif /* MBEDTLS_FS_IO */
#else /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */
#if defined(MBEDTLS_PLATFORM_STD_MEM_HDR)
#include MBEDTLS_PLATFORM_STD_MEM_HDR
#endif
#endif /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */


/* \} name SECTION: Module settings */

/*
 * The function pointers for calloc and free.
 */
#if defined(MBEDTLS_PLATFORM_MEMORY)
#if defined(MBEDTLS_PLATFORM_FREE_MACRO) && \
    defined(MBEDTLS_PLATFORM_CALLOC_MACRO)
#define mbedtls_free       MBEDTLS_PLATFORM_FREE_MACRO
#define mbedtls_calloc     MBEDTLS_PLATFORM_CALLOC_MACRO
#else
/* For size_t */
#include <stddef.h>
extern void *mbedtls_calloc( size_t n, size_t size );
extern void mbedtls_free( void *ptr );

/**
 * \brief               This function dynamically sets the memory-management
 *                      functions used by the library, during runtime.
 *
 * \param calloc_func   The \c calloc function implementation.
 * \param free_func     The \c free function implementation.
 *
 * \return              \c 0.
 */
int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ),
                              void (*free_func)( void * ) );
#endif /* MBEDTLS_PLATFORM_FREE_MACRO && MBEDTLS_PLATFORM_CALLOC_MACRO */
#else /* !MBEDTLS_PLATFORM_MEMORY */
#define mbedtls_free       free
#define mbedtls_calloc     calloc
#endif /* MBEDTLS_PLATFORM_MEMORY && !MBEDTLS_PLATFORM_{FREE,CALLOC}_MACRO */

/*
 * The function pointers for fprintf
 */
#if defined(MBEDTLS_PLATFORM_FPRINTF_ALT)
/* We need FILE * */
#include <stdio.h>
extern int (*mbedtls_fprintf)( FILE *stream, const char *format, ... );

/**
 * \brief                This function dynamically configures the fprintf
 *                       function that is called when the
 *                       mbedtls_fprintf() function is invoked by the library.
 *
 * \param fprintf_func   The \c fprintf function implementation.
 *
 * \return               \c 0.
 */
int mbedtls_platform_set_fprintf( int (*fprintf_func)( FILE *stream, const char *,
                                               ... ) );
#else
#if defined(MBEDTLS_PLATFORM_FPRINTF_MACRO)
#define mbedtls_fprintf    MBEDTLS_PLATFORM_FPRINTF_MACRO
#else
#define mbedtls_fprintf    fprintf
#endif /* MBEDTLS_PLATFORM_FPRINTF_MACRO */
#endif /* MBEDTLS_PLATFORM_FPRINTF_ALT */

/*
 * The function pointers for printf
 */
#if defined(MBEDTLS_PLATFORM_PRINTF_ALT)
extern int (*mbedtls_printf)( const char *format, ... );

/**
 * \brief               This function dynamically configures the snprintf
 *                      function that is called when the mbedtls_snprintf()
 *                      function is invoked by the library.
 *
 * \param printf_func   The \c printf function implementation.
 *
 * \return              \c 0 on success.
 */
int mbedtls_platform_set_printf( int (*printf_func)( const char *, ... ) );
#else /* !MBEDTLS_PLATFORM_PRINTF_ALT */
#if defined(MBEDTLS_PLATFORM_PRINTF_MACRO)
#define mbedtls_printf     MBEDTLS_PLATFORM_PRINTF_MACRO
#else
#define mbedtls_printf     printf
#endif /* MBEDTLS_PLATFORM_PRINTF_MACRO */
#endif /* MBEDTLS_PLATFORM_PRINTF_ALT */

/*
 * The function pointers for snprintf
 *
 * The snprintf implementation should conform to C99:
 * - it *must* always correctly zero-terminate the buffer
 *   (except when n == 0, then it must leave the buffer untouched)
 * - however it is acceptable to return -1 instead of the required length when
 *   the destination buffer is too short.
 */
#if defined(MBEDTLS_PLATFORM_HAS_NON_CONFORMING_SNPRINTF)
/* For Windows (inc. MSYS2), we provide our own fixed implementation */
int mbedtls_platform_win32_snprintf( char *s, size_t n, const char *fmt, ... );
#endif

#if defined(MBEDTLS_PLATFORM_SNPRINTF_ALT)
extern int (*mbedtls_snprintf)( char * s, size_t n, const char * format, ... );

/**
 * \brief                 This function allows configuring a custom
 *                        \c snprintf function pointer.
 *
 * \param snprintf_func   The \c snprintf function implementation.
 *
 * \return                \c 0 on success.
 */
int mbedtls_platform_set_snprintf( int (*snprintf_func)( char * s, size_t n,
                                                 const char * format, ... ) );
#else /* MBEDTLS_PLATFORM_SNPRINTF_ALT */
#if defined(MBEDTLS_PLATFORM_SNPRINTF_MACRO)
#define mbedtls_snprintf   MBEDTLS_PLATFORM_SNPRINTF_MACRO
#else
#define mbedtls_snprintf   MBEDTLS_PLATFORM_STD_SNPRINTF
#endif /* MBEDTLS_PLATFORM_SNPRINTF_MACRO */
#endif /* MBEDTLS_PLATFORM_SNPRINTF_ALT */

/*
 * The function pointers for vsnprintf
 *
 * The vsnprintf implementation should conform to C99:
 * - it *must* always correctly zero-terminate the buffer
 *   (except when n == 0, then it must leave the buffer untouched)
 * - however it is acceptable to return -1 instead of the required length when
 *   the destination buffer is too short.
 */
#if defined(MBEDTLS_PLATFORM_HAS_NON_CONFORMING_VSNPRINTF)
#include <stdarg.h>
/* For Older Windows (inc. MSYS2), we provide our own fixed implementation */
int mbedtls_platform_win32_vsnprintf( char *s, size_t n, const char *fmt, va_list arg );
#endif

#if defined(MBEDTLS_PLATFORM_VSNPRINTF_ALT)
#include <stdarg.h>
extern int (*mbedtls_vsnprintf)( char * s, size_t n, const char * format, va_list arg );

/**
 * \brief   Set your own snprintf function pointer
 *
 * \param   vsnprintf_func   The \c vsnprintf function implementation
 *
 * \return  \c 0
 */
int mbedtls_platform_set_vsnprintf( int (*vsnprintf_func)( char * s, size_t n,
                                                 const char * format, va_list arg ) );
#else /* MBEDTLS_PLATFORM_VSNPRINTF_ALT */
#if defined(MBEDTLS_PLATFORM_VSNPRINTF_MACRO)
#define mbedtls_vsnprintf   MBEDTLS_PLATFORM_VSNPRINTF_MACRO
#else
#define mbedtls_vsnprintf   vsnprintf
#endif /* MBEDTLS_PLATFORM_VSNPRINTF_MACRO */
#endif /* MBEDTLS_PLATFORM_VSNPRINTF_ALT */

/*
 * The function pointers for exit
 */
#if defined(MBEDTLS_PLATFORM_EXIT_ALT)
extern void (*mbedtls_exit)( int status );

/**
 * \brief             This function dynamically configures the exit
 *                    function that is called when the mbedtls_exit()
 *                    function is invoked by the library.
 *
 * \param exit_func   The \c exit function implementation.
 *
 * \return            \c 0 on success.
 */
int mbedtls_platform_set_exit( void (*exit_func)( int status ) );
#else
#if defined(MBEDTLS_PLATFORM_EXIT_MACRO)
#define mbedtls_exit   MBEDTLS_PLATFORM_EXIT_MACRO
#else
#define mbedtls_exit   exit
#endif /* MBEDTLS_PLATFORM_EXIT_MACRO */
#endif /* MBEDTLS_PLATFORM_EXIT_ALT */

/*
 * The default exit values
 */
#if defined(MBEDTLS_PLATFORM_STD_EXIT_SUCCESS)
#define MBEDTLS_EXIT_SUCCESS MBEDTLS_PLATFORM_STD_EXIT_SUCCESS
#else
#define MBEDTLS_EXIT_SUCCESS 0
#endif
#if defined(MBEDTLS_PLATFORM_STD_EXIT_FAILURE)
#define MBEDTLS_EXIT_FAILURE MBEDTLS_PLATFORM_STD_EXIT_FAILURE
#else
#define MBEDTLS_EXIT_FAILURE 1
#endif

/*
 * The function pointers for reading from and writing a seed file to
 * Non-Volatile storage (NV) in a platform-independent way
 *
 * Only enabled when the NV seed entropy source is enabled
 */
#if defined(MBEDTLS_ENTROPY_NV_SEED)
#if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS) && defined(MBEDTLS_FS_IO)
/* Internal standard platform definitions */
int mbedtls_platform_std_nv_seed_read( unsigned char *buf, size_t buf_len );
int mbedtls_platform_std_nv_seed_write( unsigned char *buf, size_t buf_len );
#endif

#if defined(MBEDTLS_PLATFORM_NV_SEED_ALT)
extern int (*mbedtls_nv_seed_read)( unsigned char *buf, size_t buf_len );
extern int (*mbedtls_nv_seed_write)( unsigned char *buf, size_t buf_len );

/**
 * \brief   This function allows configuring custom seed file writing and
 *          reading functions.
 *
 * \param   nv_seed_read_func   The seed reading function implementation.
 * \param   nv_seed_write_func  The seed writing function implementation.
 *
 * \return  \c 0 on success.
 */
int mbedtls_platform_set_nv_seed(
            int (*nv_seed_read_func)( unsigned char *buf, size_t buf_len ),
            int (*nv_seed_write_func)( unsigned char *buf, size_t buf_len )
            );
#else
#if defined(MBEDTLS_PLATFORM_NV_SEED_READ_MACRO) && \
    defined(MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO)
#define mbedtls_nv_seed_read    MBEDTLS_PLATFORM_NV_SEED_READ_MACRO
#define mbedtls_nv_seed_write   MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO
#else
#define mbedtls_nv_seed_read    mbedtls_platform_std_nv_seed_read
#define mbedtls_nv_seed_write   mbedtls_platform_std_nv_seed_write
#endif
#endif /* MBEDTLS_PLATFORM_NV_SEED_ALT */
#endif /* MBEDTLS_ENTROPY_NV_SEED */

#if !defined(MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT)

/**
 * \brief   The platform context structure.
 *
 * \note    This structure may be used to assist platform-specific
 *          setup or teardown operations.
 */
typedef struct mbedtls_platform_context
{
    char dummy; /**< A placeholder member, as empty structs are not portable. */
}
mbedtls_platform_context;

#else

#endif /* !MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT */

/**
 * \brief   This function performs any platform-specific initialization
 *          operations.
 *
 * \note    This function should be called before any other library functions.
 *
 *          Its implementation is platform-specific, and unless
 *          platform-specific code is provided, it does nothing.
 *
 * \note    The usage and necessity of this function is dependent on the platform.
 *
 * \param   ctx     The platform context.
 *
 * \return  \c 0 on success.
 */
int mbedtls_platform_setup( mbedtls_platform_context *ctx );
/**
 * \brief   This function performs any platform teardown operations.
 *
 * \note    This function should be called after every other Mbed TLS module
 *          has been correctly freed using the appropriate free function.
 *
 *          Its implementation is platform-specific, and unless
 *          platform-specific code is provided, it does nothing.
 *
 * \note    The usage and necessity of this function is dependent on the platform.
 *
 * \param   ctx     The platform context.
 *
 */
void mbedtls_platform_teardown( mbedtls_platform_context *ctx );

#ifdef __cplusplus
}
#endif

#endif /* platform.h */


/********* Start of file include/mbedtls/platform_time.h ************/

/**
 * \file platform_time.h
 *
 * \brief mbed TLS Platform time abstraction
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_PLATFORM_TIME_H
#define MBEDTLS_PLATFORM_TIME_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */

/*
 * The time_t datatype
 */
#if defined(MBEDTLS_PLATFORM_TIME_TYPE_MACRO)
typedef MBEDTLS_PLATFORM_TIME_TYPE_MACRO mbedtls_time_t;
#else
/* For time_t */
#include <time.h>
typedef time_t mbedtls_time_t;
#endif /* MBEDTLS_PLATFORM_TIME_TYPE_MACRO */

/*
 * The function pointers for time
 */
#if defined(MBEDTLS_PLATFORM_TIME_ALT)
extern mbedtls_time_t (*mbedtls_time)( mbedtls_time_t* time );

/**
 * \brief   Set your own time function pointer
 *
 * \param   time_func   the time function implementation
 *
 * \return              0
 */
int mbedtls_platform_set_time( mbedtls_time_t (*time_func)( mbedtls_time_t* time ) );
#else
#if defined(MBEDTLS_PLATFORM_TIME_MACRO)
#define mbedtls_time    MBEDTLS_PLATFORM_TIME_MACRO
#else
#define mbedtls_time   time
#endif /* MBEDTLS_PLATFORM_TIME_MACRO */
#endif /* MBEDTLS_PLATFORM_TIME_ALT */

#ifdef __cplusplus
}
#endif

#endif /* platform_time.h */


/********* Start of file include/mbedtls/platform_util.h ************/

/**
 * \file platform_util.h
 *
 * \brief Common and shared functions used by multiple modules in the Mbed TLS
 *        library.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_PLATFORM_UTIL_H
#define MBEDTLS_PLATFORM_UTIL_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#if defined(MBEDTLS_HAVE_TIME_DATE)

#include <time.h>
#endif /* MBEDTLS_HAVE_TIME_DATE */

#ifdef __cplusplus
extern "C" {
#endif

#if defined(MBEDTLS_CHECK_PARAMS)

#if defined(MBEDTLS_CHECK_PARAMS_ASSERT)
/* Allow the user to define MBEDTLS_PARAM_FAILED to something like assert
 * (which is what our config.h suggests). */
#include <assert.h>
#endif /* MBEDTLS_CHECK_PARAMS_ASSERT */

#if defined(MBEDTLS_PARAM_FAILED)
/** An alternative definition of MBEDTLS_PARAM_FAILED has been set in config.h.
 *
 * This flag can be used to check whether it is safe to assume that
 * MBEDTLS_PARAM_FAILED() will expand to a call to mbedtls_param_failed().
 */
#define MBEDTLS_PARAM_FAILED_ALT

#elif defined(MBEDTLS_CHECK_PARAMS_ASSERT)
#define MBEDTLS_PARAM_FAILED( cond ) assert( cond )
#define MBEDTLS_PARAM_FAILED_ALT

#else /* MBEDTLS_PARAM_FAILED */
#define MBEDTLS_PARAM_FAILED( cond ) \
    mbedtls_param_failed( #cond, __FILE__, __LINE__ )

/**
 * \brief       User supplied callback function for parameter validation failure.
 *              See #MBEDTLS_CHECK_PARAMS for context.
 *
 *              This function will be called unless an alternative treatement
 *              is defined through the #MBEDTLS_PARAM_FAILED macro.
 *
 *              This function can return, and the operation will be aborted, or
 *              alternatively, through use of setjmp()/longjmp() can resume
 *              execution in the application code.
 *
 * \param failure_condition The assertion that didn't hold.
 * \param file  The file where the assertion failed.
 * \param line  The line in the file where the assertion failed.
 */
void mbedtls_param_failed( const char *failure_condition,
                           const char *file,
                           int line );
#endif /* MBEDTLS_PARAM_FAILED */

/* Internal macro meant to be called only from within the library. */
#define MBEDTLS_INTERNAL_VALIDATE_RET( cond, ret )  \
    do {                                            \
        if( !(cond) )                               \
        {                                           \
            MBEDTLS_PARAM_FAILED( cond );           \
            return( ret );                          \
        }                                           \
    } while( 0 )

/* Internal macro meant to be called only from within the library. */
#define MBEDTLS_INTERNAL_VALIDATE( cond )           \
    do {                                            \
        if( !(cond) )                               \
        {                                           \
            MBEDTLS_PARAM_FAILED( cond );           \
            return;                                 \
        }                                           \
    } while( 0 )

#else /* MBEDTLS_CHECK_PARAMS */

/* Internal macros meant to be called only from within the library. */
#define MBEDTLS_INTERNAL_VALIDATE_RET( cond, ret )  do { } while( 0 )
#define MBEDTLS_INTERNAL_VALIDATE( cond )           do { } while( 0 )

#endif /* MBEDTLS_CHECK_PARAMS */

/* Internal helper macros for deprecating API constants. */
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
/* Deliberately don't (yet) export MBEDTLS_DEPRECATED here
 * to avoid conflict with other headers which define and use
 * it, too. We might want to move all these definitions here at
 * some point for uniformity. */
#define MBEDTLS_DEPRECATED __attribute__((deprecated))
MBEDTLS_DEPRECATED typedef char const * mbedtls_deprecated_string_constant_t;
#define MBEDTLS_DEPRECATED_STRING_CONSTANT( VAL )       \
    ( (mbedtls_deprecated_string_constant_t) ( VAL ) )
MBEDTLS_DEPRECATED typedef int mbedtls_deprecated_numeric_constant_t;
#define MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( VAL )       \
    ( (mbedtls_deprecated_numeric_constant_t) ( VAL ) )
#undef MBEDTLS_DEPRECATED
#else /* MBEDTLS_DEPRECATED_WARNING */
#define MBEDTLS_DEPRECATED_STRING_CONSTANT( VAL ) VAL
#define MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( VAL ) VAL
#endif /* MBEDTLS_DEPRECATED_WARNING */
#endif /* MBEDTLS_DEPRECATED_REMOVED */

/* Implementation of the check-return facility.
 * See the user documentation in config.h.
 *
 * Do not use this macro directly to annotate function: instead,
 * use one of MBEDTLS_CHECK_RETURN_CRITICAL or MBEDTLS_CHECK_RETURN_TYPICAL
 * depending on how important it is to check the return value.
 */
#if !defined(MBEDTLS_CHECK_RETURN)
#if defined(__GNUC__)
#define MBEDTLS_CHECK_RETURN __attribute__((__warn_unused_result__))
#elif defined(_MSC_VER) && _MSC_VER >= 1700
#include <sal.h>
#define MBEDTLS_CHECK_RETURN _Check_return_
#else
#define MBEDTLS_CHECK_RETURN
#endif
#endif

/** Critical-failure function
 *
 * This macro appearing at the beginning of the declaration of a function
 * indicates that its return value should be checked in all applications.
 * Omitting the check is very likely to indicate a bug in the application
 * and will result in a compile-time warning if #MBEDTLS_CHECK_RETURN
 * is implemented for the compiler in use.
 *
 * \note  The use of this macro is a work in progress.
 *        This macro may be added to more functions in the future.
 *        Such an extension is not considered an API break, provided that
 *        there are near-unavoidable circumstances under which the function
 *        can fail. For example, signature/MAC/AEAD verification functions,
 *        and functions that require a random generator, are considered
 *        return-check-critical.
 */
#define MBEDTLS_CHECK_RETURN_CRITICAL MBEDTLS_CHECK_RETURN

/** Ordinary-failure function
 *
 * This macro appearing at the beginning of the declaration of a function
 * indicates that its return value should be generally be checked in portable
 * applications. Omitting the check will result in a compile-time warning if
 * #MBEDTLS_CHECK_RETURN is implemented for the compiler in use and
 * #MBEDTLS_CHECK_RETURN_WARNING is enabled in the compile-time configuration.
 *
 * You can use #MBEDTLS_IGNORE_RETURN to explicitly ignore the return value
 * of a function that is annotated with #MBEDTLS_CHECK_RETURN.
 *
 * \note  The use of this macro is a work in progress.
 *        This macro will be added to more functions in the future.
 *        Eventually this should appear before most functions returning
 *        an error code (as \c int in the \c mbedtls_xxx API or
 *        as ::psa_status_t in the \c psa_xxx API).
 */
#if defined(MBEDTLS_CHECK_RETURN_WARNING)
#define MBEDTLS_CHECK_RETURN_TYPICAL MBEDTLS_CHECK_RETURN
#else
#define MBEDTLS_CHECK_RETURN_TYPICAL
#endif

/** Benign-failure function
 *
 * This macro appearing at the beginning of the declaration of a function
 * indicates that it is rarely useful to check its return value.
 *
 * This macro has an empty expansion. It exists for documentation purposes:
 * a #MBEDTLS_CHECK_RETURN_OPTIONAL annotation indicates that the function
 * has been analyzed for return-check usefuless, whereas the lack of
 * an annotation indicates that the function has not been analyzed and its
 * return-check usefulness is unknown.
 */
#define MBEDTLS_CHECK_RETURN_OPTIONAL

/** \def MBEDTLS_IGNORE_RETURN
 *
 * Call this macro with one argument, a function call, to suppress a warning
 * from #MBEDTLS_CHECK_RETURN due to that function call.
 */
#if !defined(MBEDTLS_IGNORE_RETURN)
/* GCC doesn't silence the warning with just (void)(result).
 * (void)!(result) is known to work up at least up to GCC 10, as well
 * as with Clang and MSVC.
 *
 * https://gcc.gnu.org/onlinedocs/gcc-3.4.6/gcc/Non_002dbugs.html
 * https://stackoverflow.com/questions/40576003/ignoring-warning-wunused-result
 * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425#c34
 */
#define MBEDTLS_IGNORE_RETURN(result) ( (void) !( result ) )
#endif

/**
 * \brief       Securely zeroize a buffer
 *
 *              The function is meant to wipe the data contained in a buffer so
 *              that it can no longer be recovered even if the program memory
 *              is later compromised. Call this function on sensitive data
 *              stored on the stack before returning from a function, and on
 *              sensitive data stored on the heap before freeing the heap
 *              object.
 *
 *              It is extremely difficult to guarantee that calls to
 *              mbedtls_platform_zeroize() are not removed by aggressive
 *              compiler optimizations in a portable way. For this reason, Mbed
 *              TLS provides the configuration option
 *              MBEDTLS_PLATFORM_ZEROIZE_ALT, which allows users to configure
 *              mbedtls_platform_zeroize() to use a suitable implementation for
 *              their platform and needs
 *
 * \param buf   Buffer to be zeroized
 * \param len   Length of the buffer in bytes
 *
 */
void mbedtls_platform_zeroize( void *buf, size_t len );

#if defined(MBEDTLS_HAVE_TIME_DATE)
/**
 * \brief      Platform-specific implementation of gmtime_r()
 *
 *             The function is a thread-safe abstraction that behaves
 *             similarly to the gmtime_r() function from Unix/POSIX.
 *
 *             Mbed TLS will try to identify the underlying platform and
 *             make use of an appropriate underlying implementation (e.g.
 *             gmtime_r() for POSIX and gmtime_s() for Windows). If this is
 *             not possible, then gmtime() will be used. In this case, calls
 *             from the library to gmtime() will be guarded by the mutex
 *             mbedtls_threading_gmtime_mutex if MBEDTLS_THREADING_C is
 *             enabled. It is recommended that calls from outside the library
 *             are also guarded by this mutex.
 *
 *             If MBEDTLS_PLATFORM_GMTIME_R_ALT is defined, then Mbed TLS will
 *             unconditionally use the alternative implementation for
 *             mbedtls_platform_gmtime_r() supplied by the user at compile time.
 *
 * \param tt     Pointer to an object containing time (in seconds) since the
 *               epoch to be converted
 * \param tm_buf Pointer to an object where the results will be stored
 *
 * \return      Pointer to an object of type struct tm on success, otherwise
 *              NULL
 */
struct tm *mbedtls_platform_gmtime_r( const mbedtls_time_t *tt,
                                      struct tm *tm_buf );
#endif /* MBEDTLS_HAVE_TIME_DATE */

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_PLATFORM_UTIL_H */


/********* Start of file include/mbedtls/threading.h ************/

/**
 * \file threading.h
 *
 * \brief Threading abstraction layer
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_THREADING_H
#define MBEDTLS_THREADING_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stdlib.h>

#ifdef __cplusplus
extern "C" {
#endif

/* MBEDTLS_ERR_THREADING_FEATURE_UNAVAILABLE is deprecated and should not be
 * used. */
/** The selected feature is not available. */
#define MBEDTLS_ERR_THREADING_FEATURE_UNAVAILABLE         -0x001A

/** Bad input parameters to function. */
#define MBEDTLS_ERR_THREADING_BAD_INPUT_DATA              -0x001C
/** Locking / unlocking / free failed with error code. */
#define MBEDTLS_ERR_THREADING_MUTEX_ERROR                 -0x001E

#if defined(MBEDTLS_THREADING_PTHREAD)
#include <pthread.h>
typedef struct mbedtls_threading_mutex_t
{
    pthread_mutex_t mutex;
    /* is_valid is 0 after a failed init or a free, and nonzero after a
     * successful init. This field is not considered part of the public
     * API of Mbed TLS and may change without notice. */
    char is_valid;
} mbedtls_threading_mutex_t;
#endif

#if defined(MBEDTLS_THREADING_ALT)
/* You should define the mbedtls_threading_mutex_t type in your header */


/**
 * \brief           Set your alternate threading implementation function
 *                  pointers and initialize global mutexes. If used, this
 *                  function must be called once in the main thread before any
 *                  other mbed TLS function is called, and
 *                  mbedtls_threading_free_alt() must be called once in the main
 *                  thread after all other mbed TLS functions.
 *
 * \note            mutex_init() and mutex_free() don't return a status code.
 *                  If mutex_init() fails, it should leave its argument (the
 *                  mutex) in a state such that mutex_lock() will fail when
 *                  called with this argument.
 *
 * \param mutex_init    the init function implementation
 * \param mutex_free    the free function implementation
 * \param mutex_lock    the lock function implementation
 * \param mutex_unlock  the unlock function implementation
 */
void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
                       void (*mutex_free)( mbedtls_threading_mutex_t * ),
                       int (*mutex_lock)( mbedtls_threading_mutex_t * ),
                       int (*mutex_unlock)( mbedtls_threading_mutex_t * ) );

/**
 * \brief               Free global mutexes.
 */
void mbedtls_threading_free_alt( void );
#endif /* MBEDTLS_THREADING_ALT */

#if defined(MBEDTLS_THREADING_C)
/*
 * The function pointers for mutex_init, mutex_free, mutex_ and mutex_unlock
 *
 * All these functions are expected to work or the result will be undefined.
 */
extern void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t *mutex );
extern void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t *mutex );
extern int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t *mutex );
extern int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t *mutex );

/*
 * Global mutexes
 */
#if defined(MBEDTLS_FS_IO)
extern mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex;
#endif

#if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_R_ALT)
/* This mutex may or may not be used in the default definition of
 * mbedtls_platform_gmtime_r(), but in order to determine that,
 * we need to check POSIX features, hence modify _POSIX_C_SOURCE.
 * With the current approach, this declaration is orphaned, lacking
 * an accompanying definition, in case mbedtls_platform_gmtime_r()
 * doesn't need it, but that's not a problem. */
extern mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex;
#endif /* MBEDTLS_HAVE_TIME_DATE && !MBEDTLS_PLATFORM_GMTIME_R_ALT */

#endif /* MBEDTLS_THREADING_C */

#ifdef __cplusplus
}
#endif

#endif /* threading.h */


/********* Start of file include/mbedtls/bignum.h ************/

/**
 * \file bignum.h
 *
 * \brief Multi-precision integer library
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_BIGNUM_H
#define MBEDTLS_BIGNUM_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

#if defined(MBEDTLS_FS_IO)
#include <stdio.h>
#endif

/** An error occurred while reading from or writing to a file. */
#define MBEDTLS_ERR_MPI_FILE_IO_ERROR                     -0x0002
/** Bad input parameters to function. */
#define MBEDTLS_ERR_MPI_BAD_INPUT_DATA                    -0x0004
/** There is an invalid character in the digit string. */
#define MBEDTLS_ERR_MPI_INVALID_CHARACTER                 -0x0006
/** The buffer is too small to write to. */
#define MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL                  -0x0008
/** The input arguments are negative or result in illegal output. */
#define MBEDTLS_ERR_MPI_NEGATIVE_VALUE                    -0x000A
/** The input argument for division is zero, which is not allowed. */
#define MBEDTLS_ERR_MPI_DIVISION_BY_ZERO                  -0x000C
/** The input arguments are not acceptable. */
#define MBEDTLS_ERR_MPI_NOT_ACCEPTABLE                    -0x000E
/** Memory allocation failed. */
#define MBEDTLS_ERR_MPI_ALLOC_FAILED                      -0x0010

#define MBEDTLS_MPI_CHK(f)       \
    do                           \
    {                            \
        if( ( ret = (f) ) != 0 ) \
            goto cleanup;        \
    } while( 0 )

/*
 * Maximum size MPIs are allowed to grow to in number of limbs.
 */
#define MBEDTLS_MPI_MAX_LIMBS                             10000

#if !defined(MBEDTLS_MPI_WINDOW_SIZE)
/*
 * Maximum window size used for modular exponentiation. Default: 6
 * Minimum value: 1. Maximum value: 6.
 *
 * Result is an array of ( 2 ** MBEDTLS_MPI_WINDOW_SIZE ) MPIs used
 * for the sliding window calculation. (So 64 by default)
 *
 * Reduction in size, reduces speed.
 */
#define MBEDTLS_MPI_WINDOW_SIZE                           6        /**< Maximum window size used. */
#endif /* !MBEDTLS_MPI_WINDOW_SIZE */

#if !defined(MBEDTLS_MPI_MAX_SIZE)
/*
 * Maximum size of MPIs allowed in bits and bytes for user-MPIs.
 * ( Default: 512 bytes => 4096 bits, Maximum tested: 2048 bytes => 16384 bits )
 *
 * Note: Calculations can temporarily result in larger MPIs. So the number
 * of limbs required (MBEDTLS_MPI_MAX_LIMBS) is higher.
 */
#define MBEDTLS_MPI_MAX_SIZE                              1024     /**< Maximum number of bytes for usable MPIs. */
#endif /* !MBEDTLS_MPI_MAX_SIZE */

#define MBEDTLS_MPI_MAX_BITS                              ( 8 * MBEDTLS_MPI_MAX_SIZE )    /**< Maximum number of bits for usable MPIs. */

/*
 * When reading from files with mbedtls_mpi_read_file() and writing to files with
 * mbedtls_mpi_write_file() the buffer should have space
 * for a (short) label, the MPI (in the provided radix), the newline
 * characters and the '\0'.
 *
 * By default we assume at least a 10 char label, a minimum radix of 10
 * (decimal) and a maximum of 4096 bit numbers (1234 decimal chars).
 * Autosized at compile time for at least a 10 char label, a minimum radix
 * of 10 (decimal) for a number of MBEDTLS_MPI_MAX_BITS size.
 *
 * This used to be statically sized to 1250 for a maximum of 4096 bit
 * numbers (1234 decimal chars).
 *
 * Calculate using the formula:
 *  MBEDTLS_MPI_RW_BUFFER_SIZE = ceil(MBEDTLS_MPI_MAX_BITS / ln(10) * ln(2)) +
 *                                LabelSize + 6
 */
#define MBEDTLS_MPI_MAX_BITS_SCALE100          ( 100 * MBEDTLS_MPI_MAX_BITS )
#define MBEDTLS_LN_2_DIV_LN_10_SCALE100                 332
#define MBEDTLS_MPI_RW_BUFFER_SIZE             ( ((MBEDTLS_MPI_MAX_BITS_SCALE100 + MBEDTLS_LN_2_DIV_LN_10_SCALE100 - 1) / MBEDTLS_LN_2_DIV_LN_10_SCALE100) + 10 + 6 )

/*
 * Define the base integer type, architecture-wise.
 *
 * 32 or 64-bit integer types can be forced regardless of the underlying
 * architecture by defining MBEDTLS_HAVE_INT32 or MBEDTLS_HAVE_INT64
 * respectively and undefining MBEDTLS_HAVE_ASM.
 *
 * Double-width integers (e.g. 128-bit in 64-bit architectures) can be
 * disabled by defining MBEDTLS_NO_UDBL_DIVISION.
 */
#if !defined(MBEDTLS_HAVE_INT32)
    #if defined(_MSC_VER) && defined(_M_AMD64)
        /* Always choose 64-bit when using MSC */
        #if !defined(MBEDTLS_HAVE_INT64)
            #define MBEDTLS_HAVE_INT64
        #endif /* !MBEDTLS_HAVE_INT64 */
        typedef  int64_t mbedtls_mpi_sint;
        typedef uint64_t mbedtls_mpi_uint;
    #elif defined(__GNUC__) && (                         \
        defined(__amd64__) || defined(__x86_64__)     || \
        defined(__ppc64__) || defined(__powerpc64__)  || \
        defined(__ia64__)  || defined(__alpha__)      || \
        ( defined(__sparc__) && defined(__arch64__) ) || \
        defined(__s390x__) || defined(__mips64)       || \
        defined(__aarch64__) )
        #if !defined(MBEDTLS_HAVE_INT64)
            #define MBEDTLS_HAVE_INT64
        #endif /* MBEDTLS_HAVE_INT64 */
        typedef  int64_t mbedtls_mpi_sint;
        typedef uint64_t mbedtls_mpi_uint;
        #if !defined(MBEDTLS_NO_UDBL_DIVISION)
            /* mbedtls_t_udbl defined as 128-bit unsigned int */
            typedef unsigned int mbedtls_t_udbl __attribute__((mode(TI)));
            #define MBEDTLS_HAVE_UDBL
        #endif /* !MBEDTLS_NO_UDBL_DIVISION */
    #elif defined(__ARMCC_VERSION) && defined(__aarch64__)
        /*
         * __ARMCC_VERSION is defined for both armcc and armclang and
         * __aarch64__ is only defined by armclang when compiling 64-bit code
         */
        #if !defined(MBEDTLS_HAVE_INT64)
            #define MBEDTLS_HAVE_INT64
        #endif /* !MBEDTLS_HAVE_INT64 */
        typedef  int64_t mbedtls_mpi_sint;
        typedef uint64_t mbedtls_mpi_uint;
        #if !defined(MBEDTLS_NO_UDBL_DIVISION)
            /* mbedtls_t_udbl defined as 128-bit unsigned int */
            typedef __uint128_t mbedtls_t_udbl;
            #define MBEDTLS_HAVE_UDBL
        #endif /* !MBEDTLS_NO_UDBL_DIVISION */
    #elif defined(MBEDTLS_HAVE_INT64)
        /* Force 64-bit integers with unknown compiler */
        typedef  int64_t mbedtls_mpi_sint;
        typedef uint64_t mbedtls_mpi_uint;
    #endif
#endif /* !MBEDTLS_HAVE_INT32 */

#if !defined(MBEDTLS_HAVE_INT64)
    /* Default to 32-bit compilation */
    #if !defined(MBEDTLS_HAVE_INT32)
        #define MBEDTLS_HAVE_INT32
    #endif /* !MBEDTLS_HAVE_INT32 */
    typedef  int32_t mbedtls_mpi_sint;
    typedef uint32_t mbedtls_mpi_uint;
    #if !defined(MBEDTLS_NO_UDBL_DIVISION)
        typedef uint64_t mbedtls_t_udbl;
        #define MBEDTLS_HAVE_UDBL
    #endif /* !MBEDTLS_NO_UDBL_DIVISION */
#endif /* !MBEDTLS_HAVE_INT64 */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief          MPI structure
 */
typedef struct mbedtls_mpi
{
    int s;              /*!<  Sign: -1 if the mpi is negative, 1 otherwise */
    size_t n;           /*!<  total # of limbs  */
    mbedtls_mpi_uint *p;          /*!<  pointer to limbs  */
}
mbedtls_mpi;

/**
 * \brief           Initialize an MPI context.
 *
 *                  This makes the MPI ready to be set or freed,
 *                  but does not define a value for the MPI.
 *
 * \param X         The MPI context to initialize. This must not be \c NULL.
 */
void mbedtls_mpi_init( mbedtls_mpi *X );

/**
 * \brief          This function frees the components of an MPI context.
 *
 * \param X        The MPI context to be cleared. This may be \c NULL,
 *                 in which case this function is a no-op. If it is
 *                 not \c NULL, it must point to an initialized MPI.
 */
void mbedtls_mpi_free( mbedtls_mpi *X );

/**
 * \brief          Enlarge an MPI to the specified number of limbs.
 *
 * \note           This function does nothing if the MPI is
 *                 already large enough.
 *
 * \param X        The MPI to grow. It must be initialized.
 * \param nblimbs  The target number of limbs.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         Another negative error code on other kinds of failure.
 */
int mbedtls_mpi_grow( mbedtls_mpi *X, size_t nblimbs );

/**
 * \brief          This function resizes an MPI downwards, keeping at least the
 *                 specified number of limbs.
 *
 *                 If \c X is smaller than \c nblimbs, it is resized up
 *                 instead.
 *
 * \param X        The MPI to shrink. This must point to an initialized MPI.
 * \param nblimbs  The minimum number of limbs to keep.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
 *                 (this can only happen when resizing up).
 * \return         Another negative error code on other kinds of failure.
 */
int mbedtls_mpi_shrink( mbedtls_mpi *X, size_t nblimbs );

/**
 * \brief          Make a copy of an MPI.
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param Y        The source MPI. This must point to an initialized MPI.
 *
 * \note           The limb-buffer in the destination MPI is enlarged
 *                 if necessary to hold the value in the source MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         Another negative error code on other kinds of failure.
 */
int mbedtls_mpi_copy( mbedtls_mpi *X, const mbedtls_mpi *Y );

/**
 * \brief          Swap the contents of two MPIs.
 *
 * \param X        The first MPI. It must be initialized.
 * \param Y        The second MPI. It must be initialized.
 */
void mbedtls_mpi_swap( mbedtls_mpi *X, mbedtls_mpi *Y );

/**
 * \brief          Perform a safe conditional copy of MPI which doesn't
 *                 reveal whether the condition was true or not.
 *
 * \param X        The MPI to conditionally assign to. This must point
 *                 to an initialized MPI.
 * \param Y        The MPI to be assigned from. This must point to an
 *                 initialized MPI.
 * \param assign   The condition deciding whether to perform the
 *                 assignment or not. Possible values:
 *                 * \c 1: Perform the assignment `X = Y`.
 *                 * \c 0: Keep the original value of \p X.
 *
 * \note           This function is equivalent to
 *                      `if( assign ) mbedtls_mpi_copy( X, Y );`
 *                 except that it avoids leaking any information about whether
 *                 the assignment was done or not (the above code may leak
 *                 information through branch prediction and/or memory access
 *                 patterns analysis).
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         Another negative error code on other kinds of failure.
 */
int mbedtls_mpi_safe_cond_assign( mbedtls_mpi *X, const mbedtls_mpi *Y, unsigned char assign );

/**
 * \brief          Perform a safe conditional swap which doesn't
 *                 reveal whether the condition was true or not.
 *
 * \param X        The first MPI. This must be initialized.
 * \param Y        The second MPI. This must be initialized.
 * \param assign   The condition deciding whether to perform
 *                 the swap or not. Possible values:
 *                 * \c 1: Swap the values of \p X and \p Y.
 *                 * \c 0: Keep the original values of \p X and \p Y.
 *
 * \note           This function is equivalent to
 *                      if( assign ) mbedtls_mpi_swap( X, Y );
 *                 except that it avoids leaking any information about whether
 *                 the assignment was done or not (the above code may leak
 *                 information through branch prediction and/or memory access
 *                 patterns analysis).
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         Another negative error code on other kinds of failure.
 *
 */
int mbedtls_mpi_safe_cond_swap( mbedtls_mpi *X, mbedtls_mpi *Y, unsigned char assign );

/**
 * \brief          Store integer value in MPI.
 *
 * \param X        The MPI to set. This must be initialized.
 * \param z        The value to use.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         Another negative error code on other kinds of failure.
 */
int mbedtls_mpi_lset( mbedtls_mpi *X, mbedtls_mpi_sint z );

/**
 * \brief          Get a specific bit from an MPI.
 *
 * \param X        The MPI to query. This must be initialized.
 * \param pos      Zero-based index of the bit to query.
 *
 * \return         \c 0 or \c 1 on success, depending on whether bit \c pos
 *                 of \c X is unset or set.
 * \return         A negative error code on failure.
 */
int mbedtls_mpi_get_bit( const mbedtls_mpi *X, size_t pos );

/**
 * \brief          Modify a specific bit in an MPI.
 *
 * \note           This function will grow the target MPI if necessary to set a
 *                 bit to \c 1 in a not yet existing limb. It will not grow if
 *                 the bit should be set to \c 0.
 *
 * \param X        The MPI to modify. This must be initialized.
 * \param pos      Zero-based index of the bit to modify.
 * \param val      The desired value of bit \c pos: \c 0 or \c 1.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         Another negative error code on other kinds of failure.
 */
int mbedtls_mpi_set_bit( mbedtls_mpi *X, size_t pos, unsigned char val );

/**
 * \brief          Return the number of bits of value \c 0 before the
 *                 least significant bit of value \c 1.
 *
 * \note           This is the same as the zero-based index of
 *                 the least significant bit of value \c 1.
 *
 * \param X        The MPI to query.
 *
 * \return         The number of bits of value \c 0 before the least significant
 *                 bit of value \c 1 in \p X.
 */
size_t mbedtls_mpi_lsb( const mbedtls_mpi *X );

/**
 * \brief          Return the number of bits up to and including the most
 *                 significant bit of value \c 1.
 *
 * * \note         This is same as the one-based index of the most
 *                 significant bit of value \c 1.
 *
 * \param X        The MPI to query. This must point to an initialized MPI.
 *
 * \return         The number of bits up to and including the most
 *                 significant bit of value \c 1.
 */
size_t mbedtls_mpi_bitlen( const mbedtls_mpi *X );

/**
 * \brief          Return the total size of an MPI value in bytes.
 *
 * \param X        The MPI to use. This must point to an initialized MPI.
 *
 * \note           The value returned by this function may be less than
 *                 the number of bytes used to store \p X internally.
 *                 This happens if and only if there are trailing bytes
 *                 of value zero.
 *
 * \return         The least number of bytes capable of storing
 *                 the absolute value of \p X.
 */
size_t mbedtls_mpi_size( const mbedtls_mpi *X );

/**
 * \brief          Import an MPI from an ASCII string.
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param radix    The numeric base of the input string.
 * \param s        Null-terminated string buffer.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_mpi_read_string( mbedtls_mpi *X, int radix, const char *s );

/**
 * \brief          Export an MPI to an ASCII string.
 *
 * \param X        The source MPI. This must point to an initialized MPI.
 * \param radix    The numeric base of the output string.
 * \param buf      The buffer to write the string to. This must be writable
 *                 buffer of length \p buflen Bytes.
 * \param buflen   The available size in Bytes of \p buf.
 * \param olen     The address at which to store the length of the string
 *                 written, including the  final \c NULL byte. This must
 *                 not be \c NULL.
 *
 * \note           You can call this function with `buflen == 0` to obtain the
 *                 minimum required buffer size in `*olen`.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if the target buffer \p buf
 *                 is too small to hold the value of \p X in the desired base.
 *                 In this case, `*olen` is nonetheless updated to contain the
 *                 size of \p buf required for a successful call.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_write_string( const mbedtls_mpi *X, int radix,
                              char *buf, size_t buflen, size_t *olen );

#if defined(MBEDTLS_FS_IO)
/**
 * \brief          Read an MPI from a line in an opened file.
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param radix    The numeric base of the string representation used
 *                 in the source line.
 * \param fin      The input file handle to use. This must not be \c NULL.
 *
 * \note           On success, this function advances the file stream
 *                 to the end of the current line or to EOF.
 *
 *                 The function returns \c 0 on an empty line.
 *
 *                 Leading whitespaces are ignored, as is a
 *                 '0x' prefix for radix \c 16.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if the file read buffer
 *                 is too small.
 * \return         Another negative error code on failure.
 */
int mbedtls_mpi_read_file( mbedtls_mpi *X, int radix, FILE *fin );

/**
 * \brief          Export an MPI into an opened file.
 *
 * \param p        A string prefix to emit prior to the MPI data.
 *                 For example, this might be a label, or "0x" when
 *                 printing in base \c 16. This may be \c NULL if no prefix
 *                 is needed.
 * \param X        The source MPI. This must point to an initialized MPI.
 * \param radix    The numeric base to be used in the emitted string.
 * \param fout     The output file handle. This may be \c NULL, in which case
 *                 the output is written to \c stdout.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_mpi_write_file( const char *p, const mbedtls_mpi *X,
                            int radix, FILE *fout );
#endif /* MBEDTLS_FS_IO */

/**
 * \brief          Import an MPI from unsigned big endian binary data.
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param buf      The input buffer. This must be a readable buffer of length
 *                 \p buflen Bytes.
 * \param buflen   The length of the input buffer \p p in Bytes.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_read_binary( mbedtls_mpi *X, const unsigned char *buf,
                             size_t buflen );

/**
 * \brief          Import X from unsigned binary data, little endian
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param buf      The input buffer. This must be a readable buffer of length
 *                 \p buflen Bytes.
 * \param buflen   The length of the input buffer \p p in Bytes.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_read_binary_le( mbedtls_mpi *X,
                                const unsigned char *buf, size_t buflen );

/**
 * \brief          Export X into unsigned binary data, big endian.
 *                 Always fills the whole buffer, which will start with zeros
 *                 if the number is smaller.
 *
 * \param X        The source MPI. This must point to an initialized MPI.
 * \param buf      The output buffer. This must be a writable buffer of length
 *                 \p buflen Bytes.
 * \param buflen   The size of the output buffer \p buf in Bytes.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if \p buf isn't
 *                 large enough to hold the value of \p X.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_write_binary( const mbedtls_mpi *X, unsigned char *buf,
                              size_t buflen );

/**
 * \brief          Export X into unsigned binary data, little endian.
 *                 Always fills the whole buffer, which will end with zeros
 *                 if the number is smaller.
 *
 * \param X        The source MPI. This must point to an initialized MPI.
 * \param buf      The output buffer. This must be a writable buffer of length
 *                 \p buflen Bytes.
 * \param buflen   The size of the output buffer \p buf in Bytes.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if \p buf isn't
 *                 large enough to hold the value of \p X.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_write_binary_le( const mbedtls_mpi *X,
                                 unsigned char *buf, size_t buflen );

/**
 * \brief          Perform a left-shift on an MPI: X <<= count
 *
 * \param X        The MPI to shift. This must point to an initialized MPI.
 * \param count    The number of bits to shift by.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_shift_l( mbedtls_mpi *X, size_t count );

/**
 * \brief          Perform a right-shift on an MPI: X >>= count
 *
 * \param X        The MPI to shift. This must point to an initialized MPI.
 * \param count    The number of bits to shift by.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_shift_r( mbedtls_mpi *X, size_t count );

/**
 * \brief          Compare the absolute values of two MPIs.
 *
 * \param X        The left-hand MPI. This must point to an initialized MPI.
 * \param Y        The right-hand MPI. This must point to an initialized MPI.
 *
 * \return         \c 1 if `|X|` is greater than `|Y|`.
 * \return         \c -1 if `|X|` is lesser than `|Y|`.
 * \return         \c 0 if `|X|` is equal to `|Y|`.
 */
int mbedtls_mpi_cmp_abs( const mbedtls_mpi *X, const mbedtls_mpi *Y );

/**
 * \brief          Compare two MPIs.
 *
 * \param X        The left-hand MPI. This must point to an initialized MPI.
 * \param Y        The right-hand MPI. This must point to an initialized MPI.
 *
 * \return         \c 1 if \p X is greater than \p Y.
 * \return         \c -1 if \p X is lesser than \p Y.
 * \return         \c 0 if \p X is equal to \p Y.
 */
int mbedtls_mpi_cmp_mpi( const mbedtls_mpi *X, const mbedtls_mpi *Y );

/**
 * \brief          Check if an MPI is less than the other in constant time.
 *
 * \param X        The left-hand MPI. This must point to an initialized MPI
 *                 with the same allocated length as Y.
 * \param Y        The right-hand MPI. This must point to an initialized MPI
 *                 with the same allocated length as X.
 * \param ret      The result of the comparison:
 *                 \c 1 if \p X is less than \p Y.
 *                 \c 0 if \p X is greater than or equal to \p Y.
 *
 * \return         0 on success.
 * \return         MBEDTLS_ERR_MPI_BAD_INPUT_DATA if the allocated length of
 *                 the two input MPIs is not the same.
 */
int mbedtls_mpi_lt_mpi_ct( const mbedtls_mpi *X, const mbedtls_mpi *Y,
        unsigned *ret );

/**
 * \brief          Compare an MPI with an integer.
 *
 * \param X        The left-hand MPI. This must point to an initialized MPI.
 * \param z        The integer value to compare \p X to.
 *
 * \return         \c 1 if \p X is greater than \p z.
 * \return         \c -1 if \p X is lesser than \p z.
 * \return         \c 0 if \p X is equal to \p z.
 */
int mbedtls_mpi_cmp_int( const mbedtls_mpi *X, mbedtls_mpi_sint z );

/**
 * \brief          Perform an unsigned addition of MPIs: X = |A| + |B|
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The first summand. This must point to an initialized MPI.
 * \param B        The second summand. This must point to an initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_add_abs( mbedtls_mpi *X, const mbedtls_mpi *A,
                         const mbedtls_mpi *B );

/**
 * \brief          Perform an unsigned subtraction of MPIs: X = |A| - |B|
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The minuend. This must point to an initialized MPI.
 * \param B        The subtrahend. This must point to an initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_NEGATIVE_VALUE if \p B is greater than \p A.
 * \return         Another negative error code on different kinds of failure.
 *
 */
int mbedtls_mpi_sub_abs( mbedtls_mpi *X, const mbedtls_mpi *A,
                         const mbedtls_mpi *B );

/**
 * \brief          Perform a signed addition of MPIs: X = A + B
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The first summand. This must point to an initialized MPI.
 * \param B        The second summand. This must point to an initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_add_mpi( mbedtls_mpi *X, const mbedtls_mpi *A,
                         const mbedtls_mpi *B );

/**
 * \brief          Perform a signed subtraction of MPIs: X = A - B
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The minuend. This must point to an initialized MPI.
 * \param B        The subtrahend. This must point to an initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_sub_mpi( mbedtls_mpi *X, const mbedtls_mpi *A,
                         const mbedtls_mpi *B );

/**
 * \brief          Perform a signed addition of an MPI and an integer: X = A + b
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The first summand. This must point to an initialized MPI.
 * \param b        The second summand.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_add_int( mbedtls_mpi *X, const mbedtls_mpi *A,
                         mbedtls_mpi_sint b );

/**
 * \brief          Perform a signed subtraction of an MPI and an integer:
 *                 X = A - b
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The minuend. This must point to an initialized MPI.
 * \param b        The subtrahend.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_sub_int( mbedtls_mpi *X, const mbedtls_mpi *A,
                         mbedtls_mpi_sint b );

/**
 * \brief          Perform a multiplication of two MPIs: X = A * B
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The first factor. This must point to an initialized MPI.
 * \param B        The second factor. This must point to an initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 *
 */
int mbedtls_mpi_mul_mpi( mbedtls_mpi *X, const mbedtls_mpi *A,
                         const mbedtls_mpi *B );

/**
 * \brief          Perform a multiplication of an MPI with an unsigned integer:
 *                 X = A * b
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The first factor. This must point to an initialized MPI.
 * \param b        The second factor.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 *
 */
int mbedtls_mpi_mul_int( mbedtls_mpi *X, const mbedtls_mpi *A,
                         mbedtls_mpi_uint b );

/**
 * \brief          Perform a division with remainder of two MPIs:
 *                 A = Q * B + R
 *
 * \param Q        The destination MPI for the quotient.
 *                 This may be \c NULL if the value of the
 *                 quotient is not needed.
 * \param R        The destination MPI for the remainder value.
 *                 This may be \c NULL if the value of the
 *                 remainder is not needed.
 * \param A        The dividend. This must point to an initialized MPi.
 * \param B        The divisor. This must point to an initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_DIVISION_BY_ZERO if \p B equals zero.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_div_mpi( mbedtls_mpi *Q, mbedtls_mpi *R, const mbedtls_mpi *A,
                         const mbedtls_mpi *B );

/**
 * \brief          Perform a division with remainder of an MPI by an integer:
 *                 A = Q * b + R
 *
 * \param Q        The destination MPI for the quotient.
 *                 This may be \c NULL if the value of the
 *                 quotient is not needed.
 * \param R        The destination MPI for the remainder value.
 *                 This may be \c NULL if the value of the
 *                 remainder is not needed.
 * \param A        The dividend. This must point to an initialized MPi.
 * \param b        The divisor.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_DIVISION_BY_ZERO if \p b equals zero.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_div_int( mbedtls_mpi *Q, mbedtls_mpi *R, const mbedtls_mpi *A,
                         mbedtls_mpi_sint b );

/**
 * \brief          Perform a modular reduction. R = A mod B
 *
 * \param R        The destination MPI for the residue value.
 *                 This must point to an initialized MPI.
 * \param A        The MPI to compute the residue of.
 *                 This must point to an initialized MPI.
 * \param B        The base of the modular reduction.
 *                 This must point to an initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_DIVISION_BY_ZERO if \p B equals zero.
 * \return         #MBEDTLS_ERR_MPI_NEGATIVE_VALUE if \p B is negative.
 * \return         Another negative error code on different kinds of failure.
 *
 */
int mbedtls_mpi_mod_mpi( mbedtls_mpi *R, const mbedtls_mpi *A,
                         const mbedtls_mpi *B );

/**
 * \brief          Perform a modular reduction with respect to an integer.
 *                 r = A mod b
 *
 * \param r        The address at which to store the residue.
 *                 This must not be \c NULL.
 * \param A        The MPI to compute the residue of.
 *                 This must point to an initialized MPi.
 * \param b        The integer base of the modular reduction.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_DIVISION_BY_ZERO if \p b equals zero.
 * \return         #MBEDTLS_ERR_MPI_NEGATIVE_VALUE if \p b is negative.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_mod_int( mbedtls_mpi_uint *r, const mbedtls_mpi *A,
                         mbedtls_mpi_sint b );

/**
 * \brief          Perform a sliding-window exponentiation: X = A^E mod N
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The base of the exponentiation.
 *                 This must point to an initialized MPI.
 * \param E        The exponent MPI. This must point to an initialized MPI.
 * \param N        The base for the modular reduction. This must point to an
 *                 initialized MPI.
 * \param prec_RR  A helper MPI depending solely on \p N which can be used to
 *                 speed-up multiple modular exponentiations for the same value
 *                 of \p N. This may be \c NULL. If it is not \c NULL, it must
 *                 point to an initialized MPI. If it hasn't been used after
 *                 the call to mbedtls_mpi_init(), this function will compute
 *                 the helper value and store it in \p prec_RR for reuse on
 *                 subsequent calls to this function. Otherwise, the function
 *                 will assume that \p prec_RR holds the helper value set by a
 *                 previous call to mbedtls_mpi_exp_mod(), and reuse it.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_BAD_INPUT_DATA if \c N is negative or
 *                 even, or if \c E is negative.
 * \return         Another negative error code on different kinds of failures.
 *
 */
int mbedtls_mpi_exp_mod( mbedtls_mpi *X, const mbedtls_mpi *A,
                         const mbedtls_mpi *E, const mbedtls_mpi *N,
                         mbedtls_mpi *prec_RR );

/**
 * \brief          Fill an MPI with a number of random bytes.
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param size     The number of random bytes to generate.
 * \param f_rng    The RNG function to use. This must not be \c NULL.
 * \param p_rng    The RNG parameter to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng doesn't need a context argument.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on failure.
 *
 * \note           The bytes obtained from the RNG are interpreted
 *                 as a big-endian representation of an MPI; this can
 *                 be relevant in applications like deterministic ECDSA.
 */
int mbedtls_mpi_fill_random( mbedtls_mpi *X, size_t size,
                     int (*f_rng)(void *, unsigned char *, size_t),
                     void *p_rng );

/** Generate a random number uniformly in a range.
 *
 * This function generates a random number between \p min inclusive and
 * \p N exclusive.
 *
 * The procedure complies with RFC 6979 §3.3 (deterministic ECDSA)
 * when the RNG is a suitably parametrized instance of HMAC_DRBG
 * and \p min is \c 1.
 *
 * \note           There are `N - min` possible outputs. The lower bound
 *                 \p min can be reached, but the upper bound \p N cannot.
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param min      The minimum value to return.
 *                 It must be nonnegative.
 * \param N        The upper bound of the range, exclusive.
 *                 In other words, this is one plus the maximum value to return.
 *                 \p N must be strictly larger than \p min.
 * \param f_rng    The RNG function to use. This must not be \c NULL.
 * \param p_rng    The RNG parameter to be passed to \p f_rng.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_BAD_INPUT_DATA if \p min or \p N is invalid
 *                 or if they are incompatible.
 * \return         #MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if the implementation was
 *                 unable to find a suitable value within a limited number
 *                 of attempts. This has a negligible probability if \p N
 *                 is significantly larger than \p min, which is the case
 *                 for all usual cryptographic applications.
 * \return         Another negative error code on failure.
 */
int mbedtls_mpi_random( mbedtls_mpi *X,
                        mbedtls_mpi_sint min,
                        const mbedtls_mpi *N,
                        int (*f_rng)(void *, unsigned char *, size_t),
                        void *p_rng );

/**
 * \brief          Compute the greatest common divisor: G = gcd(A, B)
 *
 * \param G        The destination MPI. This must point to an initialized MPI.
 * \param A        The first operand. This must point to an initialized MPI.
 * \param B        The second operand. This must point to an initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         Another negative error code on different kinds of failure.
 */
int mbedtls_mpi_gcd( mbedtls_mpi *G, const mbedtls_mpi *A,
                     const mbedtls_mpi *B );

/**
 * \brief          Compute the modular inverse: X = A^-1 mod N
 *
 * \param X        The destination MPI. This must point to an initialized MPI.
 * \param A        The MPI to calculate the modular inverse of. This must point
 *                 to an initialized MPI.
 * \param N        The base of the modular inversion. This must point to an
 *                 initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_BAD_INPUT_DATA if \p N is less than
 *                 or equal to one.
 * \return         #MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if \p has no modular inverse
 *                 with respect to \p N.
 */
int mbedtls_mpi_inv_mod( mbedtls_mpi *X, const mbedtls_mpi *A,
                         const mbedtls_mpi *N );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          Perform a Miller-Rabin primality test with error
 *                 probability of 2<sup>-80</sup>.
 *
 * \deprecated     Superseded by mbedtls_mpi_is_prime_ext() which allows
 *                 specifying the number of Miller-Rabin rounds.
 *
 * \param X        The MPI to check for primality.
 *                 This must point to an initialized MPI.
 * \param f_rng    The RNG function to use. This must not be \c NULL.
 * \param p_rng    The RNG parameter to be passed to \p f_rng.
 *                 This may be \c NULL if \p f_rng doesn't use a
 *                 context parameter.
 *
 * \return         \c 0 if successful, i.e. \p X is probably prime.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if \p X is not prime.
 * \return         Another negative error code on other kinds of failure.
 */
MBEDTLS_DEPRECATED int mbedtls_mpi_is_prime( const mbedtls_mpi *X,
                          int (*f_rng)(void *, unsigned char *, size_t),
                          void *p_rng );
#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          Miller-Rabin primality test.
 *
 * \warning        If \p X is potentially generated by an adversary, for example
 *                 when validating cryptographic parameters that you didn't
 *                 generate yourself and that are supposed to be prime, then
 *                 \p rounds should be at least the half of the security
 *                 strength of the cryptographic algorithm. On the other hand,
 *                 if \p X is chosen uniformly or non-adversially (as is the
 *                 case when mbedtls_mpi_gen_prime calls this function), then
 *                 \p rounds can be much lower.
 *
 * \param X        The MPI to check for primality.
 *                 This must point to an initialized MPI.
 * \param rounds   The number of bases to perform the Miller-Rabin primality
 *                 test for. The probability of returning 0 on a composite is
 *                 at most 2<sup>-2*\p rounds</sup>.
 * \param f_rng    The RNG function to use. This must not be \c NULL.
 * \param p_rng    The RNG parameter to be passed to \p f_rng.
 *                 This may be \c NULL if \p f_rng doesn't use
 *                 a context parameter.
 *
 * \return         \c 0 if successful, i.e. \p X is probably prime.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if \p X is not prime.
 * \return         Another negative error code on other kinds of failure.
 */
int mbedtls_mpi_is_prime_ext( const mbedtls_mpi *X, int rounds,
                              int (*f_rng)(void *, unsigned char *, size_t),
                              void *p_rng );
/**
 * \brief Flags for mbedtls_mpi_gen_prime()
 *
 * Each of these flags is a constraint on the result X returned by
 * mbedtls_mpi_gen_prime().
 */
typedef enum {
    MBEDTLS_MPI_GEN_PRIME_FLAG_DH =      0x0001, /**< (X-1)/2 is prime too */
    MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR = 0x0002, /**< lower error rate from 2<sup>-80</sup> to 2<sup>-128</sup> */
} mbedtls_mpi_gen_prime_flag_t;

/**
 * \brief          Generate a prime number.
 *
 * \param X        The destination MPI to store the generated prime in.
 *                 This must point to an initialized MPi.
 * \param nbits    The required size of the destination MPI in bits.
 *                 This must be between \c 3 and #MBEDTLS_MPI_MAX_BITS.
 * \param flags    A mask of flags of type #mbedtls_mpi_gen_prime_flag_t.
 * \param f_rng    The RNG function to use. This must not be \c NULL.
 * \param p_rng    The RNG parameter to be passed to \p f_rng.
 *                 This may be \c NULL if \p f_rng doesn't use
 *                 a context parameter.
 *
 * \return         \c 0 if successful, in which case \p X holds a
 *                 probably prime number.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
 * \return         #MBEDTLS_ERR_MPI_BAD_INPUT_DATA if `nbits` is not between
 *                 \c 3 and #MBEDTLS_MPI_MAX_BITS.
 */
int mbedtls_mpi_gen_prime( mbedtls_mpi *X, size_t nbits, int flags,
                   int (*f_rng)(void *, unsigned char *, size_t),
                   void *p_rng );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int mbedtls_mpi_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* bignum.h */


/********* Start of file include/mbedtls/constant_time.h ************/

/**
 *  Constant-time functions
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_CONSTANT_TIME_H
#define MBEDTLS_CONSTANT_TIME_H

#include <stddef.h>


/** Constant-time buffer comparison without branches.
 *
 * This is equivalent to the standard memcmp function, but is likely to be
 * compiled to code using bitwise operation rather than a branch.
 *
 * This function can be used to write constant-time code by replacing branches
 * with bit operations using masks.
 *
 * \param a     Pointer to the first buffer.
 * \param b     Pointer to the second buffer.
 * \param n     The number of bytes to compare in the buffer.
 *
 * \return      Zero if the content of the two buffer is the same,
 *              otherwise non-zero.
 */
int mbedtls_ct_memcmp( const void *a,
                       const void *b,
                       size_t n );

#endif /* MBEDTLS_CONSTANT_TIME_H */


/********* Start of file library/constant_time_internal.h ************/

/**
 *  Constant-time functions
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_CONSTANT_TIME_INTERNAL_H
#define MBEDTLS_CONSTANT_TIME_INTERNAL_H



#if defined(MBEDTLS_BIGNUM_C)

#endif

#if defined(MBEDTLS_SSL_TLS_C)

#endif

#include <stddef.h>


/** Turn a value into a mask:
 * - if \p value == 0, return the all-bits 0 mask, aka 0
 * - otherwise, return the all-bits 1 mask, aka (unsigned) -1
 *
 * This function can be used to write constant-time code by replacing branches
 * with bit operations using masks.
 *
 * \param value     The value to analyze.
 *
 * \return          Zero if \p value is zero, otherwise all-bits-one.
 */
unsigned mbedtls_ct_uint_mask( unsigned value );

#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)

/** Turn a value into a mask:
 * - if \p value == 0, return the all-bits 0 mask, aka 0
 * - otherwise, return the all-bits 1 mask, aka (size_t) -1
 *
 * This function can be used to write constant-time code by replacing branches
 * with bit operations using masks.
 *
 * \param value     The value to analyze.
 *
 * \return          Zero if \p value is zero, otherwise all-bits-one.
 */
size_t mbedtls_ct_size_mask( size_t value );

#endif /* MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC */

#if defined(MBEDTLS_BIGNUM_C)

/** Turn a value into a mask:
 * - if \p value == 0, return the all-bits 0 mask, aka 0
 * - otherwise, return the all-bits 1 mask, aka (mbedtls_mpi_uint) -1
 *
 * This function can be used to write constant-time code by replacing branches
 * with bit operations using masks.
 *
 * \param value     The value to analyze.
 *
 * \return          Zero if \p value is zero, otherwise all-bits-one.
 */
mbedtls_mpi_uint mbedtls_ct_mpi_uint_mask( mbedtls_mpi_uint value );

#endif /* MBEDTLS_BIGNUM_C */

#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)

/** Constant-flow mask generation for "greater or equal" comparison:
 * - if \p x >= \p y, return all-bits 1, that is (size_t) -1
 * - otherwise, return all bits 0, that is 0
 *
 * This function can be used to write constant-time code by replacing branches
 * with bit operations using masks.
 *
 * \param x     The first value to analyze.
 * \param y     The second value to analyze.
 *
 * \return      All-bits-one if \p x is greater or equal than \p y,
 *              otherwise zero.
 */
size_t mbedtls_ct_size_mask_ge( size_t x,
                                size_t y );

#endif /* MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC */

/** Constant-flow boolean "equal" comparison:
 * return x == y
 *
 * This is equivalent to \p x == \p y, but is likely to be compiled
 * to code using bitwise operation rather than a branch.
 *
 * \param x     The first value to analyze.
 * \param y     The second value to analyze.
 *
 * \return      1 if \p x equals to \p y, otherwise 0.
 */
unsigned mbedtls_ct_size_bool_eq( size_t x,
                                  size_t y );

#if defined(MBEDTLS_BIGNUM_C)

/** Decide if an integer is less than the other, without branches.
 *
 * This is equivalent to \p x < \p y, but is likely to be compiled
 * to code using bitwise operation rather than a branch.
 *
 * \param x     The first value to analyze.
 * \param y     The second value to analyze.
 *
 * \return      1 if \p x is less than \p y, otherwise 0.
 */
unsigned mbedtls_ct_mpi_uint_lt( const mbedtls_mpi_uint x,
                                 const mbedtls_mpi_uint y );

#endif /* MBEDTLS_BIGNUM_C */

/** Choose between two integer values without branches.
 *
 * This is equivalent to `condition ? if1 : if0`, but is likely to be compiled
 * to code using bitwise operation rather than a branch.
 *
 * \param condition     Condition to test.
 * \param if1           Value to use if \p condition is nonzero.
 * \param if0           Value to use if \p condition is zero.
 *
 * \return  \c if1 if \p condition is nonzero, otherwise \c if0.
 */
unsigned mbedtls_ct_uint_if( unsigned condition,
                             unsigned if1,
                             unsigned if0 );

#if defined(MBEDTLS_BIGNUM_C)

/** Conditionally assign a value without branches.
 *
 * This is equivalent to `if ( condition ) dest = src`, but is likely
 * to be compiled to code using bitwise operation rather than a branch.
 *
 * \param n             \p dest and \p src must be arrays of limbs of size n.
 * \param dest          The MPI to conditionally assign to. This must point
 *                      to an initialized MPI.
 * \param src           The MPI to be assigned from. This must point to an
 *                      initialized MPI.
 * \param condition     Condition to test, must be 0 or 1.
 */
void mbedtls_ct_mpi_uint_cond_assign( size_t n,
                                      mbedtls_mpi_uint *dest,
                                      const mbedtls_mpi_uint *src,
                                      unsigned char condition );

#endif /* MBEDTLS_BIGNUM_C */

#if defined(MBEDTLS_BASE64_C)

/** Given a value in the range 0..63, return the corresponding Base64 digit.
 *
 * The implementation assumes that letters are consecutive (e.g. ASCII
 * but not EBCDIC).
 *
 * \param value     A value in the range 0..63.
 *
 * \return          A base64 digit converted from \p value.
 */
unsigned char mbedtls_ct_base64_enc_char( unsigned char value );

/** Given a Base64 digit, return its value.
 *
 * If c is not a Base64 digit ('A'..'Z', 'a'..'z', '0'..'9', '+' or '/'),
 * return -1.
 *
 * The implementation assumes that letters are consecutive (e.g. ASCII
 * but not EBCDIC).
 *
 * \param c     A base64 digit.
 *
 * \return      The value of the base64 digit \p c.
 */
signed char mbedtls_ct_base64_dec_value( unsigned char c );

#endif /* MBEDTLS_BASE64_C */

#if defined(MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC)

/** Conditional memcpy without branches.
 *
 * This is equivalent to `if ( c1 == c2 ) memcpy(dest, src, len)`, but is likely
 * to be compiled to code using bitwise operation rather than a branch.
 *
 * \param dest      The pointer to conditionally copy to.
 * \param src       The pointer to copy from. Shouldn't overlap with \p dest.
 * \param len       The number of bytes to copy.
 * \param c1        The first value to analyze in the condition.
 * \param c2        The second value to analyze in the condition.
 */
void mbedtls_ct_memcpy_if_eq( unsigned char *dest,
                              const unsigned char *src,
                              size_t len,
                              size_t c1, size_t c2 );

/** Copy data from a secret position with constant flow.
 *
 * This function copies \p len bytes from \p src_base + \p offset_secret to \p
 * dst, with a code flow and memory access pattern that does not depend on \p
 * offset_secret, but only on \p offset_min, \p offset_max and \p len.
 * Functionally equivalent to `memcpy(dst, src + offset_secret, len)`.
 *
 * \param dest          The destination buffer. This must point to a writable
 *                      buffer of at least \p len bytes.
 * \param src           The base of the source buffer. This must point to a
 *                      readable buffer of at least \p offset_max + \p len
 *                      bytes. Shouldn't overlap with \p dest.
 * \param offset        The offset in the source buffer from which to copy.
 *                      This must be no less than \p offset_min and no greater
 *                      than \p offset_max.
 * \param offset_min    The minimal value of \p offset.
 * \param offset_max    The maximal value of \p offset.
 * \param len           The number of bytes to copy.
 */
void mbedtls_ct_memcpy_offset( unsigned char *dest,
                               const unsigned char *src,
                               size_t offset,
                               size_t offset_min,
                               size_t offset_max,
                               size_t len );

/** Compute the HMAC of variable-length data with constant flow.
 *
 * This function computes the HMAC of the concatenation of \p add_data and \p
 * data, and does with a code flow and memory access pattern that does not
 * depend on \p data_len_secret, but only on \p min_data_len and \p
 * max_data_len. In particular, this function always reads exactly \p
 * max_data_len bytes from \p data.
 *
 * \param ctx               The HMAC context. It must have keys configured
 *                          with mbedtls_md_hmac_starts() and use one of the
 *                          following hashes: SHA-384, SHA-256, SHA-1 or MD-5.
 *                          It is reset using mbedtls_md_hmac_reset() after
 *                          the computation is complete to prepare for the
 *                          next computation.
 * \param add_data          The first part of the message whose HMAC is being
 *                          calculated. This must point to a readable buffer
 *                          of \p add_data_len bytes.
 * \param add_data_len      The length of \p add_data in bytes.
 * \param data              The buffer containing the second part of the
 *                          message. This must point to a readable buffer
 *                          of \p max_data_len bytes.
 * \param data_len_secret   The length of the data to process in \p data.
 *                          This must be no less than \p min_data_len and no
 *                          greater than \p max_data_len.
 * \param min_data_len      The minimal length of the second part of the
 *                          message, read from \p data.
 * \param max_data_len      The maximal length of the second part of the
 *                          message, read from \p data.
 * \param output            The HMAC will be written here. This must point to
 *                          a writable buffer of sufficient size to hold the
 *                          HMAC value.
 *
 * \retval 0 on success.
 * \retval #MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED
 *         The hardware accelerator failed.
 */
int mbedtls_ct_hmac( mbedtls_md_context_t *ctx,
                     const unsigned char *add_data,
                     size_t add_data_len,
                     const unsigned char *data,
                     size_t data_len_secret,
                     size_t min_data_len,
                     size_t max_data_len,
                     unsigned char *output );

#endif /* MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC */

#if defined(MBEDTLS_PKCS1_V15) && defined(MBEDTLS_RSA_C) && !defined(MBEDTLS_RSA_ALT)

/** This function performs the unpadding part of a PKCS#1 v1.5 decryption
 *  operation (EME-PKCS1-v1_5 decoding).
 *
 * \note The return value from this function is a sensitive value
 *       (this is unusual). #MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE shouldn't happen
 *       in a well-written application, but 0 vs #MBEDTLS_ERR_RSA_INVALID_PADDING
 *       is often a situation that an attacker can provoke and leaking which
 *       one is the result is precisely the information the attacker wants.
 *
 * \param mode           The mode of operation. This must be either
 *                       #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated).
 * \param input          The input buffer which is the payload inside PKCS#1v1.5
 *                       encryption padding, called the "encoded message EM"
 *                       by the terminology.
 * \param ilen           The length of the payload in the \p input buffer.
 * \param output         The buffer for the payload, called "message M" by the
 *                       PKCS#1 terminology. This must be a writable buffer of
 *                       length \p output_max_len bytes.
 * \param olen           The address at which to store the length of
 *                       the payload. This must not be \c NULL.
 * \param output_max_len The length in bytes of the output buffer \p output.
 *
 * \return      \c 0 on success.
 * \return      #MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE
 *              The output buffer is too small for the unpadded payload.
 * \return      #MBEDTLS_ERR_RSA_INVALID_PADDING
 *              The input doesn't contain properly formatted padding.
 */
int mbedtls_ct_rsaes_pkcs1_v15_unpadding( int mode,
                                          unsigned char *input,
                                          size_t ilen,
                                          unsigned char *output,
                                          size_t output_max_len,
                                          size_t *olen );

#endif /* MBEDTLS_PKCS1_V15 && MBEDTLS_RSA_C && ! MBEDTLS_RSA_ALT */

#endif /* MBEDTLS_CONSTANT_TIME_INTERNAL_H */


/********* Start of file include/mbedtls/net.h ************/

/**
 * \file net.h
 *
 * \brief Deprecated header file that includes net_sockets.h
 *
 * \deprecated Superseded by mbedtls/net_sockets.h
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#if !defined(MBEDTLS_DEPRECATED_REMOVED)

#if defined(MBEDTLS_DEPRECATED_WARNING)
#warning "Deprecated header file: Superseded by mbedtls/net_sockets.h"
#endif /* MBEDTLS_DEPRECATED_WARNING */
#endif /* !MBEDTLS_DEPRECATED_REMOVED */


/********* Start of file include/mbedtls/net_sockets.h ************/

/**
 * \file net_sockets.h
 *
 * \brief   Network sockets abstraction layer to integrate Mbed TLS into a
 *          BSD-style sockets API.
 *
 *          The network sockets module provides an example integration of the
 *          Mbed TLS library into a BSD sockets implementation. The module is
 *          intended to be an example of how Mbed TLS can be integrated into a
 *          networking stack, as well as to be Mbed TLS's network integration
 *          for its supported platforms.
 *
 *          The module is intended only to be used with the Mbed TLS library and
 *          is not intended to be used by third party application software
 *          directly.
 *
 *          The supported platforms are as follows:
 *              * Microsoft Windows and Windows CE
 *              * POSIX/Unix platforms including Linux, OS X
 *
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_NET_SOCKETS_H
#define MBEDTLS_NET_SOCKETS_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#include <stddef.h>
#include <stdint.h>

/** Failed to open a socket. */
#define MBEDTLS_ERR_NET_SOCKET_FAILED                     -0x0042
/** The connection to the given server / port failed. */
#define MBEDTLS_ERR_NET_CONNECT_FAILED                    -0x0044
/** Binding of the socket failed. */
#define MBEDTLS_ERR_NET_BIND_FAILED                       -0x0046
/** Could not listen on the socket. */
#define MBEDTLS_ERR_NET_LISTEN_FAILED                     -0x0048
/** Could not accept the incoming connection. */
#define MBEDTLS_ERR_NET_ACCEPT_FAILED                     -0x004A
/** Reading information from the socket failed. */
#define MBEDTLS_ERR_NET_RECV_FAILED                       -0x004C
/** Sending information through the socket failed. */
#define MBEDTLS_ERR_NET_SEND_FAILED                       -0x004E
/** Connection was reset by peer. */
#define MBEDTLS_ERR_NET_CONN_RESET                        -0x0050
/** Failed to get an IP address for the given hostname. */
#define MBEDTLS_ERR_NET_UNKNOWN_HOST                      -0x0052
/** Buffer is too small to hold the data. */
#define MBEDTLS_ERR_NET_BUFFER_TOO_SMALL                  -0x0043
/** The context is invalid, eg because it was free()ed. */
#define MBEDTLS_ERR_NET_INVALID_CONTEXT                   -0x0045
/** Polling the net context failed. */
#define MBEDTLS_ERR_NET_POLL_FAILED                       -0x0047
/** Input invalid. */
#define MBEDTLS_ERR_NET_BAD_INPUT_DATA                    -0x0049

#define MBEDTLS_NET_LISTEN_BACKLOG         10 /**< The backlog that listen() should use. */

#define MBEDTLS_NET_PROTO_TCP 0 /**< The TCP transport protocol */
#define MBEDTLS_NET_PROTO_UDP 1 /**< The UDP transport protocol */

#define MBEDTLS_NET_POLL_READ  1 /**< Used in \c mbedtls_net_poll to check for pending data  */
#define MBEDTLS_NET_POLL_WRITE 2 /**< Used in \c mbedtls_net_poll to check if write possible */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Wrapper type for sockets.
 *
 * Currently backed by just a file descriptor, but might be more in the future
 * (eg two file descriptors for combined IPv4 + IPv6 support, or additional
 * structures for hand-made UDP demultiplexing).
 */
typedef struct mbedtls_net_context
{
    int fd;             /**< The underlying file descriptor                 */
}
mbedtls_net_context;

/**
 * \brief          Initialize a context
 *                 Just makes the context ready to be used or freed safely.
 *
 * \param ctx      Context to initialize
 */
void mbedtls_net_init( mbedtls_net_context *ctx );

/**
 * \brief          Initiate a connection with host:port in the given protocol
 *
 * \param ctx      Socket to use
 * \param host     Host to connect to
 * \param port     Port to connect to
 * \param proto    Protocol: MBEDTLS_NET_PROTO_TCP or MBEDTLS_NET_PROTO_UDP
 *
 * \return         0 if successful, or one of:
 *                      MBEDTLS_ERR_NET_SOCKET_FAILED,
 *                      MBEDTLS_ERR_NET_UNKNOWN_HOST,
 *                      MBEDTLS_ERR_NET_CONNECT_FAILED
 *
 * \note           Sets the socket in connected mode even with UDP.
 */
int mbedtls_net_connect( mbedtls_net_context *ctx, const char *host, const char *port, int proto );

/**
 * \brief          Create a receiving socket on bind_ip:port in the chosen
 *                 protocol. If bind_ip == NULL, all interfaces are bound.
 *
 * \param ctx      Socket to use
 * \param bind_ip  IP to bind to, can be NULL
 * \param port     Port number to use
 * \param proto    Protocol: MBEDTLS_NET_PROTO_TCP or MBEDTLS_NET_PROTO_UDP
 *
 * \return         0 if successful, or one of:
 *                      MBEDTLS_ERR_NET_SOCKET_FAILED,
 *                      MBEDTLS_ERR_NET_UNKNOWN_HOST,
 *                      MBEDTLS_ERR_NET_BIND_FAILED,
 *                      MBEDTLS_ERR_NET_LISTEN_FAILED
 *
 * \note           Regardless of the protocol, opens the sockets and binds it.
 *                 In addition, make the socket listening if protocol is TCP.
 */
int mbedtls_net_bind( mbedtls_net_context *ctx, const char *bind_ip, const char *port, int proto );

/**
 * \brief           Accept a connection from a remote client
 *
 * \param bind_ctx  Relevant socket
 * \param client_ctx Will contain the connected client socket
 * \param client_ip Will contain the client IP address, can be NULL
 * \param buf_size  Size of the client_ip buffer
 * \param ip_len    Will receive the size of the client IP written,
 *                  can be NULL if client_ip is null
 *
 * \return          0 if successful, or
 *                  MBEDTLS_ERR_NET_SOCKET_FAILED,
 *                  MBEDTLS_ERR_NET_BIND_FAILED,
 *                  MBEDTLS_ERR_NET_ACCEPT_FAILED, or
 *                  MBEDTLS_ERR_NET_BUFFER_TOO_SMALL if buf_size is too small,
 *                  MBEDTLS_ERR_SSL_WANT_READ if bind_fd was set to
 *                  non-blocking and accept() would block.
 */
int mbedtls_net_accept( mbedtls_net_context *bind_ctx,
                        mbedtls_net_context *client_ctx,
                        void *client_ip, size_t buf_size, size_t *ip_len );

/**
 * \brief          Check and wait for the context to be ready for read/write
 *
 * \note           The current implementation of this function uses
 *                 select() and returns an error if the file descriptor
 *                 is \c FD_SETSIZE or greater.
 *
 * \param ctx      Socket to check
 * \param rw       Bitflag composed of MBEDTLS_NET_POLL_READ and
 *                 MBEDTLS_NET_POLL_WRITE specifying the events
 *                 to wait for:
 *                 - If MBEDTLS_NET_POLL_READ is set, the function
 *                   will return as soon as the net context is available
 *                   for reading.
 *                 - If MBEDTLS_NET_POLL_WRITE is set, the function
 *                   will return as soon as the net context is available
 *                   for writing.
 * \param timeout  Maximal amount of time to wait before returning,
 *                 in milliseconds. If \c timeout is zero, the
 *                 function returns immediately. If \c timeout is
 *                 -1u, the function blocks potentially indefinitely.
 *
 * \return         Bitmask composed of MBEDTLS_NET_POLL_READ/WRITE
 *                 on success or timeout, or a negative return code otherwise.
 */
int mbedtls_net_poll( mbedtls_net_context *ctx, uint32_t rw, uint32_t timeout );

/**
 * \brief          Set the socket blocking
 *
 * \param ctx      Socket to set
 *
 * \return         0 if successful, or a non-zero error code
 */
int mbedtls_net_set_block( mbedtls_net_context *ctx );

/**
 * \brief          Set the socket non-blocking
 *
 * \param ctx      Socket to set
 *
 * \return         0 if successful, or a non-zero error code
 */
int mbedtls_net_set_nonblock( mbedtls_net_context *ctx );

/**
 * \brief          Portable usleep helper
 *
 * \param usec     Amount of microseconds to sleep
 *
 * \note           Real amount of time slept will not be less than
 *                 select()'s timeout granularity (typically, 10ms).
 */
void mbedtls_net_usleep( unsigned long usec );

/**
 * \brief          Read at most 'len' characters. If no error occurs,
 *                 the actual amount read is returned.
 *
 * \param ctx      Socket
 * \param buf      The buffer to write to
 * \param len      Maximum length of the buffer
 *
 * \return         the number of bytes received,
 *                 or a non-zero error code; with a non-blocking socket,
 *                 MBEDTLS_ERR_SSL_WANT_READ indicates read() would block.
 */
int mbedtls_net_recv( void *ctx, unsigned char *buf, size_t len );

/**
 * \brief          Write at most 'len' characters. If no error occurs,
 *                 the actual amount read is returned.
 *
 * \param ctx      Socket
 * \param buf      The buffer to read from
 * \param len      The length of the buffer
 *
 * \return         the number of bytes sent,
 *                 or a non-zero error code; with a non-blocking socket,
 *                 MBEDTLS_ERR_SSL_WANT_WRITE indicates write() would block.
 */
int mbedtls_net_send( void *ctx, const unsigned char *buf, size_t len );

/**
 * \brief          Read at most 'len' characters, blocking for at most
 *                 'timeout' seconds. If no error occurs, the actual amount
 *                 read is returned.
 *
 * \note           The current implementation of this function uses
 *                 select() and returns an error if the file descriptor
 *                 is \c FD_SETSIZE or greater.
 *
 * \param ctx      Socket
 * \param buf      The buffer to write to
 * \param len      Maximum length of the buffer
 * \param timeout  Maximum number of milliseconds to wait for data
 *                 0 means no timeout (wait forever)
 *
 * \return         The number of bytes received if successful.
 *                 MBEDTLS_ERR_SSL_TIMEOUT if the operation timed out.
 *                 MBEDTLS_ERR_SSL_WANT_READ if interrupted by a signal.
 *                 Another negative error code (MBEDTLS_ERR_NET_xxx)
 *                 for other failures.
 *
 * \note           This function will block (until data becomes available or
 *                 timeout is reached) even if the socket is set to
 *                 non-blocking. Handling timeouts with non-blocking reads
 *                 requires a different strategy.
 */
int mbedtls_net_recv_timeout( void *ctx, unsigned char *buf, size_t len,
                      uint32_t timeout );

/**
 * \brief          Closes down the connection and free associated data
 *
 * \param ctx      The context to close
 */
void mbedtls_net_close( mbedtls_net_context *ctx );

/**
 * \brief          Gracefully shutdown the connection and free associated data
 *
 * \param ctx      The context to free
 */
void mbedtls_net_free( mbedtls_net_context *ctx );

#ifdef __cplusplus
}
#endif

#endif /* net_sockets.h */


/********* Start of file include/mbedtls/dhm.h ************/

/**
 * \file dhm.h
 *
 * \brief   This file contains Diffie-Hellman-Merkle (DHM) key exchange
 *          definitions and functions.
 *
 * Diffie-Hellman-Merkle (DHM) key exchange is defined in
 * <em>RFC-2631: Diffie-Hellman Key Agreement Method</em> and
 * <em>Public-Key Cryptography Standards (PKCS) #3: Diffie
 * Hellman Key Agreement Standard</em>.
 *
 * <em>RFC-3526: More Modular Exponential (MODP) Diffie-Hellman groups for
 * Internet Key Exchange (IKE)</em> defines a number of standardized
 * Diffie-Hellman groups for IKE.
 *
 * <em>RFC-5114: Additional Diffie-Hellman Groups for Use with IETF
 * Standards</em> defines a number of standardized Diffie-Hellman
 * groups that can be used.
 *
 * \warning  The security of the DHM key exchange relies on the proper choice
 *           of prime modulus - optimally, it should be a safe prime. The usage
 *           of non-safe primes both decreases the difficulty of the underlying
 *           discrete logarithm problem and can lead to small subgroup attacks
 *           leaking private exponent bits when invalid public keys are used
 *           and not detected. This is especially relevant if the same DHM
 *           parameters are reused for multiple key exchanges as in static DHM,
 *           while the criticality of small-subgroup attacks is lower for
 *           ephemeral DHM.
 *
 * \warning  For performance reasons, the code does neither perform primality
 *           nor safe primality tests, nor the expensive checks for invalid
 *           subgroups. Moreover, even if these were performed, non-standardized
 *           primes cannot be trusted because of the possibility of backdoors
 *           that can't be effectively checked for.
 *
 * \warning  Diffie-Hellman-Merkle is therefore a security risk when not using
 *           standardized primes generated using a trustworthy ("nothing up
 *           my sleeve") method, such as the RFC 3526 / 7919 primes. In the TLS
 *           protocol, DH parameters need to be negotiated, so using the default
 *           primes systematically is not always an option. If possible, use
 *           Elliptic Curve Diffie-Hellman (ECDH), which has better performance,
 *           and for which the TLS protocol mandates the use of standard
 *           parameters.
 *
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_DHM_H
#define MBEDTLS_DHM_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif


/*
 * DHM Error codes
 */
/** Bad input parameters. */
#define MBEDTLS_ERR_DHM_BAD_INPUT_DATA                    -0x3080
/** Reading of the DHM parameters failed. */
#define MBEDTLS_ERR_DHM_READ_PARAMS_FAILED                -0x3100
/** Making of the DHM parameters failed. */
#define MBEDTLS_ERR_DHM_MAKE_PARAMS_FAILED                -0x3180
/** Reading of the public values failed. */
#define MBEDTLS_ERR_DHM_READ_PUBLIC_FAILED                -0x3200
/** Making of the public value failed. */
#define MBEDTLS_ERR_DHM_MAKE_PUBLIC_FAILED                -0x3280
/** Calculation of the DHM secret failed. */
#define MBEDTLS_ERR_DHM_CALC_SECRET_FAILED                -0x3300
/** The ASN.1 data is not formatted correctly. */
#define MBEDTLS_ERR_DHM_INVALID_FORMAT                    -0x3380
/** Allocation of memory failed. */
#define MBEDTLS_ERR_DHM_ALLOC_FAILED                      -0x3400
/** Read or write of file failed. */
#define MBEDTLS_ERR_DHM_FILE_IO_ERROR                     -0x3480

/* MBEDTLS_ERR_DHM_HW_ACCEL_FAILED is deprecated and should not be used. */
/** DHM hardware accelerator failed. */
#define MBEDTLS_ERR_DHM_HW_ACCEL_FAILED                   -0x3500

/** Setting the modulus and generator failed. */
#define MBEDTLS_ERR_DHM_SET_GROUP_FAILED                  -0x3580

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_DHM_ALT)

/**
 * \brief          The DHM context structure.
 */
typedef struct mbedtls_dhm_context
{
    size_t len;         /*!<  The size of \p P in Bytes. */
    mbedtls_mpi P;      /*!<  The prime modulus. */
    mbedtls_mpi G;      /*!<  The generator. */
    mbedtls_mpi X;      /*!<  Our secret value. */
    mbedtls_mpi GX;     /*!<  Our public key = \c G^X mod \c P. */
    mbedtls_mpi GY;     /*!<  The public key of the peer = \c G^Y mod \c P. */
    mbedtls_mpi K;      /*!<  The shared secret = \c G^(XY) mod \c P. */
    mbedtls_mpi RP;     /*!<  The cached value = \c R^2 mod \c P. */
    mbedtls_mpi Vi;     /*!<  The blinding value. */
    mbedtls_mpi Vf;     /*!<  The unblinding value. */
    mbedtls_mpi pX;     /*!<  The previous \c X. */
}
mbedtls_dhm_context;

#else /* MBEDTLS_DHM_ALT */

#endif /* MBEDTLS_DHM_ALT */

/**
 * \brief          This function initializes the DHM context.
 *
 * \param ctx      The DHM context to initialize.
 */
void mbedtls_dhm_init( mbedtls_dhm_context *ctx );

/**
 * \brief          This function parses the DHM parameters in a
 *                 TLS ServerKeyExchange handshake message
 *                 (DHM modulus, generator, and public key).
 *
 * \note           In a TLS handshake, this is the how the client
 *                 sets up its DHM context from the server's public
 *                 DHM key material.
 *
 * \param ctx      The DHM context to use. This must be initialized.
 * \param p        On input, *p must be the start of the input buffer.
 *                 On output, *p is updated to point to the end of the data
 *                 that has been read. On success, this is the first byte
 *                 past the end of the ServerKeyExchange parameters.
 *                 On error, this is the point at which an error has been
 *                 detected, which is usually not useful except to debug
 *                 failures.
 * \param end      The end of the input buffer.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_DHM_XXX error code on failure.
 */
int mbedtls_dhm_read_params( mbedtls_dhm_context *ctx,
                             unsigned char **p,
                             const unsigned char *end );

/**
 * \brief          This function generates a DHM key pair and exports its
 *                 public part together with the DHM parameters in the format
 *                 used in a TLS ServerKeyExchange handshake message.
 *
 * \note           This function assumes that the DHM parameters \c ctx->P
 *                 and \c ctx->G have already been properly set. For that, use
 *                 mbedtls_dhm_set_group() below in conjunction with
 *                 mbedtls_mpi_read_binary() and mbedtls_mpi_read_string().
 *
 * \note           In a TLS handshake, this is the how the server generates
 *                 and exports its DHM key material.
 *
 * \param ctx      The DHM context to use. This must be initialized
 *                 and have the DHM parameters set. It may or may not
 *                 already have imported the peer's public key.
 * \param x_size   The private key size in Bytes.
 * \param olen     The address at which to store the number of Bytes
 *                 written on success. This must not be \c NULL.
 * \param output   The destination buffer. This must be a writable buffer of
 *                 sufficient size to hold the reduced binary presentation of
 *                 the modulus, the generator and the public key, each wrapped
 *                 with a 2-byte length field. It is the responsibility of the
 *                 caller to ensure that enough space is available. Refer to
 *                 mbedtls_mpi_size() to computing the byte-size of an MPI.
 * \param f_rng    The RNG function. Must not be \c NULL.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng doesn't need a context parameter.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_DHM_XXX error code on failure.
 */
int mbedtls_dhm_make_params( mbedtls_dhm_context *ctx, int x_size,
                     unsigned char *output, size_t *olen,
                     int (*f_rng)(void *, unsigned char *, size_t),
                     void *p_rng );

/**
 * \brief          This function sets the prime modulus and generator.
 *
 * \note           This function can be used to set \c ctx->P, \c ctx->G
 *                 in preparation for mbedtls_dhm_make_params().
 *
 * \param ctx      The DHM context to configure. This must be initialized.
 * \param P        The MPI holding the DHM prime modulus. This must be
 *                 an initialized MPI.
 * \param G        The MPI holding the DHM generator. This must be an
 *                 initialized MPI.
 *
 * \return         \c 0 if successful.
 * \return         An \c MBEDTLS_ERR_DHM_XXX error code on failure.
 */
int mbedtls_dhm_set_group( mbedtls_dhm_context *ctx,
                           const mbedtls_mpi *P,
                           const mbedtls_mpi *G );

/**
 * \brief          This function imports the raw public value of the peer.
 *
 * \note           In a TLS handshake, this is the how the server imports
 *                 the Client's public DHM key.
 *
 * \param ctx      The DHM context to use. This must be initialized and have
 *                 its DHM parameters set, e.g. via mbedtls_dhm_set_group().
 *                 It may or may not already have generated its own private key.
 * \param input    The input buffer containing the \c G^Y value of the peer.
 *                 This must be a readable buffer of size \p ilen Bytes.
 * \param ilen     The size of the input buffer \p input in Bytes.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_DHM_XXX error code on failure.
 */
int mbedtls_dhm_read_public( mbedtls_dhm_context *ctx,
                     const unsigned char *input, size_t ilen );

/**
 * \brief          This function creates a DHM key pair and exports
 *                 the raw public key in big-endian format.
 *
 * \note           The destination buffer is always fully written
 *                 so as to contain a big-endian representation of G^X mod P.
 *                 If it is larger than \c ctx->len, it is padded accordingly
 *                 with zero-bytes at the beginning.
 *
 * \param ctx      The DHM context to use. This must be initialized and
 *                 have the DHM parameters set. It may or may not already
 *                 have imported the peer's public key.
 * \param x_size   The private key size in Bytes.
 * \param output   The destination buffer. This must be a writable buffer of
 *                 size \p olen Bytes.
 * \param olen     The length of the destination buffer. This must be at least
 *                 equal to `ctx->len` (the size of \c P).
 * \param f_rng    The RNG function. This must not be \c NULL.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
 *                 if \p f_rng doesn't need a context argument.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_DHM_XXX error code on failure.
 */
int mbedtls_dhm_make_public( mbedtls_dhm_context *ctx, int x_size,
                     unsigned char *output, size_t olen,
                     int (*f_rng)(void *, unsigned char *, size_t),
                     void *p_rng );

/**
 * \brief          This function derives and exports the shared secret
 *                 \c (G^Y)^X mod \c P.
 *
 * \note           If \p f_rng is not \c NULL, it is used to blind the input as
 *                 a countermeasure against timing attacks. Blinding is used
 *                 only if our private key \c X is re-used, and not used
 *                 otherwise. We recommend always passing a non-NULL
 *                 \p f_rng argument.
 *
 * \param ctx           The DHM context to use. This must be initialized
 *                      and have its own private key generated and the peer's
 *                      public key imported.
 * \param output        The buffer to write the generated shared key to. This
 *                      must be a writable buffer of size \p output_size Bytes.
 * \param output_size   The size of the destination buffer. This must be at
 *                      least the size of \c ctx->len (the size of \c P).
 * \param olen          On exit, holds the actual number of Bytes written.
 * \param f_rng         The RNG function, for blinding purposes. This may
 *                      b \c NULL if blinding isn't needed.
 * \param p_rng         The RNG context. This may be \c NULL if \p f_rng
 *                      doesn't need a context argument.
 *
 * \return              \c 0 on success.
 * \return              An \c MBEDTLS_ERR_DHM_XXX error code on failure.
 */
int mbedtls_dhm_calc_secret( mbedtls_dhm_context *ctx,
                     unsigned char *output, size_t output_size, size_t *olen,
                     int (*f_rng)(void *, unsigned char *, size_t),
                     void *p_rng );

/**
 * \brief          This function frees and clears the components
 *                 of a DHM context.
 *
 * \param ctx      The DHM context to free and clear. This may be \c NULL,
 *                 in which case this function is a no-op. If it is not \c NULL,
 *                 it must point to an initialized DHM context.
 */
void mbedtls_dhm_free( mbedtls_dhm_context *ctx );

#if defined(MBEDTLS_ASN1_PARSE_C)
/**
 * \brief             This function parses DHM parameters in PEM or DER format.
 *
 * \param dhm         The DHM context to import the DHM parameters into.
 *                    This must be initialized.
 * \param dhmin       The input buffer. This must be a readable buffer of
 *                    length \p dhminlen Bytes.
 * \param dhminlen    The size of the input buffer \p dhmin, including the
 *                    terminating \c NULL Byte for PEM data.
 *
 * \return            \c 0 on success.
 * \return            An \c MBEDTLS_ERR_DHM_XXX or \c MBEDTLS_ERR_PEM_XXX error
 *                    code on failure.
 */
int mbedtls_dhm_parse_dhm( mbedtls_dhm_context *dhm, const unsigned char *dhmin,
                           size_t dhminlen );

#if defined(MBEDTLS_FS_IO)
/**
 * \brief          This function loads and parses DHM parameters from a file.
 *
 * \param dhm      The DHM context to load the parameters to.
 *                 This must be initialized.
 * \param path     The filename to read the DHM parameters from.
 *                 This must not be \c NULL.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_DHM_XXX or \c MBEDTLS_ERR_PEM_XXX
 *                 error code on failure.
 */
int mbedtls_dhm_parse_dhmfile( mbedtls_dhm_context *dhm, const char *path );
#endif /* MBEDTLS_FS_IO */
#endif /* MBEDTLS_ASN1_PARSE_C */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          The DMH checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
int mbedtls_dhm_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */
#ifdef __cplusplus
}
#endif

/**
 * RFC 3526, RFC 5114 and RFC 7919 standardize a number of
 * Diffie-Hellman groups, some of which are included here
 * for use within the SSL/TLS module and the user's convenience
 * when configuring the Diffie-Hellman parameters by hand
 * through \c mbedtls_ssl_conf_dh_param.
 *
 * The following lists the source of the above groups in the standards:
 * - RFC 5114 section 2.2:  2048-bit MODP Group with 224-bit Prime Order Subgroup
 * - RFC 3526 section 3:    2048-bit MODP Group
 * - RFC 3526 section 4:    3072-bit MODP Group
 * - RFC 3526 section 5:    4096-bit MODP Group
 * - RFC 7919 section A.1:  ffdhe2048
 * - RFC 7919 section A.2:  ffdhe3072
 * - RFC 7919 section A.3:  ffdhe4096
 * - RFC 7919 section A.4:  ffdhe6144
 * - RFC 7919 section A.5:  ffdhe8192
 *
 * The constants with suffix "_p" denote the chosen prime moduli, while
 * the constants with suffix "_g" denote the chosen generator
 * of the associated prime field.
 *
 * The constants further suffixed with "_bin" are provided in binary format,
 * while all other constants represent null-terminated strings holding the
 * hexadecimal presentation of the respective numbers.
 *
 * The primes from RFC 3526 and RFC 7919 have been generating by the following
 * trust-worthy procedure:
 * - Fix N in { 2048, 3072, 4096, 6144, 8192 } and consider the N-bit number
 *   the first and last 64 bits are all 1, and the remaining N - 128 bits of
 *   which are 0x7ff...ff.
 * - Add the smallest multiple of the first N - 129 bits of the binary expansion
 *   of pi (for RFC 5236) or e (for RFC 7919) to this intermediate bit-string
 *   such that the resulting integer is a safe-prime.
 * - The result is the respective RFC 3526 / 7919 prime, and the corresponding
 *   generator is always chosen to be 2 (which is a square for these prime,
 *   hence the corresponding subgroup has order (p-1)/2 and avoids leaking a
 *   bit in the private exponent).
 *
 */

#if !defined(MBEDTLS_DEPRECATED_REMOVED)

/**
 * \warning The origin of the primes in RFC 5114 is not documented and
 *          their use therefore constitutes a security risk!
 *
 * \deprecated The hex-encoded primes from RFC 5114 are deprecated and are
 *             likely to be removed in a future version of the library without
 *             replacement.
 */

/**
 * The hexadecimal presentation of the prime underlying the
 * 2048-bit MODP Group with 224-bit Prime Order Subgroup, as defined
 * in <em>RFC-5114: Additional Diffie-Hellman Groups for Use with
 * IETF Standards</em>.
 */
#define MBEDTLS_DHM_RFC5114_MODP_2048_P                         \
    MBEDTLS_DEPRECATED_STRING_CONSTANT(                         \
        "AD107E1E9123A9D0D660FAA79559C51FA20D64E5683B9FD1"      \
        "B54B1597B61D0A75E6FA141DF95A56DBAF9A3C407BA1DF15"      \
        "EB3D688A309C180E1DE6B85A1274A0A66D3F8152AD6AC212"      \
        "9037C9EDEFDA4DF8D91E8FEF55B7394B7AD5B7D0B6C12207"      \
        "C9F98D11ED34DBF6C6BA0B2C8BBC27BE6A00E0A0B9C49708"      \
        "B3BF8A317091883681286130BC8985DB1602E714415D9330"      \
        "278273C7DE31EFDC7310F7121FD5A07415987D9ADC0A486D"      \
        "CDF93ACC44328387315D75E198C641A480CD86A1B9E587E8"      \
        "BE60E69CC928B2B9C52172E413042E9B23F10B0E16E79763"      \
        "C9B53DCF4BA80A29E3FB73C16B8E75B97EF363E2FFA31F71"      \
        "CF9DE5384E71B81C0AC4DFFE0C10E64F" )

/**
 * The hexadecimal presentation of the chosen generator of the 2048-bit MODP
 * Group with 224-bit Prime Order Subgroup, as defined in <em>RFC-5114:
 * Additional Diffie-Hellman Groups for Use with IETF Standards</em>.
 */
#define MBEDTLS_DHM_RFC5114_MODP_2048_G                         \
    MBEDTLS_DEPRECATED_STRING_CONSTANT(                         \
        "AC4032EF4F2D9AE39DF30B5C8FFDAC506CDEBE7B89998CAF"      \
        "74866A08CFE4FFE3A6824A4E10B9A6F0DD921F01A70C4AFA"      \
        "AB739D7700C29F52C57DB17C620A8652BE5E9001A8D66AD7"      \
        "C17669101999024AF4D027275AC1348BB8A762D0521BC98A"      \
        "E247150422EA1ED409939D54DA7460CDB5F6C6B250717CBE"      \
        "F180EB34118E98D119529A45D6F834566E3025E316A330EF"      \
        "BB77A86F0C1AB15B051AE3D428C8F8ACB70A8137150B8EEB"      \
        "10E183EDD19963DDD9E263E4770589EF6AA21E7F5F2FF381"      \
        "B539CCE3409D13CD566AFBB48D6C019181E1BCFE94B30269"      \
        "EDFE72FE9B6AA4BD7B5A0F1C71CFFF4C19C418E1F6EC0179"      \
        "81BC087F2A7065B384B890D3191F2BFA" )

/**
 * The hexadecimal presentation of the prime underlying the 2048-bit MODP
 * Group, as defined in <em>RFC-3526: More Modular Exponential (MODP)
 * Diffie-Hellman groups for Internet Key Exchange (IKE)</em>.
 *
 * \deprecated The hex-encoded primes from RFC 3625 are deprecated and
 *             superseded by the corresponding macros providing them as
 *             binary constants. Their hex-encoded constants are likely
 *             to be removed in a future version of the library.
 *
 */
#define MBEDTLS_DHM_RFC3526_MODP_2048_P                         \
    MBEDTLS_DEPRECATED_STRING_CONSTANT(                         \
        "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"      \
        "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"      \
        "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"      \
        "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"      \
        "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"      \
        "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"      \
        "83655D23DCA3AD961C62F356208552BB9ED529077096966D"      \
        "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"      \
        "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"      \
        "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"      \
        "15728E5A8AACAA68FFFFFFFFFFFFFFFF" )

/**
 * The hexadecimal presentation of the chosen generator of the 2048-bit MODP
 * Group, as defined in <em>RFC-3526: More Modular Exponential (MODP)
 * Diffie-Hellman groups for Internet Key Exchange (IKE)</em>.
 */
#define MBEDTLS_DHM_RFC3526_MODP_2048_G                         \
    MBEDTLS_DEPRECATED_STRING_CONSTANT( "02" )

/**
 * The hexadecimal presentation of the prime underlying the 3072-bit MODP
 * Group, as defined in <em>RFC-3072: More Modular Exponential (MODP)
 * Diffie-Hellman groups for Internet Key Exchange (IKE)</em>.
 */
#define MBEDTLS_DHM_RFC3526_MODP_3072_P                         \
    MBEDTLS_DEPRECATED_STRING_CONSTANT(                         \
        "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"      \
        "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"      \
        "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"      \
        "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"      \
        "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"      \
        "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"      \
        "83655D23DCA3AD961C62F356208552BB9ED529077096966D"      \
        "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"      \
        "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"      \
        "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"      \
        "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"      \
        "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"      \
        "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"      \
        "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"      \
        "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"      \
        "43DB5BFCE0FD108E4B82D120A93AD2CAFFFFFFFFFFFFFFFF" )

/**
 * The hexadecimal presentation of the chosen generator of the 3072-bit MODP
 * Group, as defined in <em>RFC-3526: More Modular Exponential (MODP)
 * Diffie-Hellman groups for Internet Key Exchange (IKE)</em>.
 */
#define MBEDTLS_DHM_RFC3526_MODP_3072_G                      \
    MBEDTLS_DEPRECATED_STRING_CONSTANT( "02" )

/**
 * The hexadecimal presentation of the prime underlying the 4096-bit MODP
 * Group, as defined in <em>RFC-3526: More Modular Exponential (MODP)
 * Diffie-Hellman groups for Internet Key Exchange (IKE)</em>.
 */
#define MBEDTLS_DHM_RFC3526_MODP_4096_P                      \
    MBEDTLS_DEPRECATED_STRING_CONSTANT(                      \
        "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"   \
        "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"   \
        "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"   \
        "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"   \
        "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"   \
        "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"   \
        "83655D23DCA3AD961C62F356208552BB9ED529077096966D"   \
        "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"   \
        "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"   \
        "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"   \
        "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"   \
        "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"   \
        "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"   \
        "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"   \
        "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"   \
        "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7"   \
        "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"   \
        "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6"   \
        "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"   \
        "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9"   \
        "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199"   \
        "FFFFFFFFFFFFFFFF" )

/**
 * The hexadecimal presentation of the chosen generator of the 4096-bit MODP
 * Group, as defined in <em>RFC-3526: More Modular Exponential (MODP)
 * Diffie-Hellman groups for Internet Key Exchange (IKE)</em>.
 */
#define MBEDTLS_DHM_RFC3526_MODP_4096_G                      \
    MBEDTLS_DEPRECATED_STRING_CONSTANT( "02" )

#endif /* MBEDTLS_DEPRECATED_REMOVED */

/*
 * Trustworthy DHM parameters in binary form
 */

#define MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN {        \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, \
     0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34, \
     0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, \
     0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, \
     0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, \
     0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD, \
     0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, \
     0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37, \
     0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, \
     0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, \
     0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, \
     0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED, \
     0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, \
     0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6, \
     0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, \
     0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, \
     0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, \
     0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F, \
     0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, \
     0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB, \
     0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, \
     0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, \
     0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, \
     0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B, \
     0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, \
     0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F, \
     0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, \
     0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18, \
     0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, \
     0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10, \
     0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68, \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }

#define MBEDTLS_DHM_RFC3526_MODP_2048_G_BIN { 0x02 }

#define MBEDTLS_DHM_RFC3526_MODP_3072_P_BIN {       \
    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, \
    0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34, \
    0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, \
    0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, \
    0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, \
    0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD, \
    0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, \
    0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37, \
    0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, \
    0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, \
    0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, \
    0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED, \
    0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, \
    0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6, \
    0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, \
    0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, \
    0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, \
    0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F, \
    0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, \
    0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB, \
    0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, \
    0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, \
    0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, \
    0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B, \
    0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, \
    0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F, \
    0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, \
    0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18, \
    0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, \
    0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10, \
    0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, \
    0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33, \
    0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, \
    0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A, \
    0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, \
    0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7, \
    0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, \
    0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D, \
    0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, \
    0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64, \
    0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, \
    0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C, \
    0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, \
    0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2, \
    0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, \
    0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E, \
    0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x3A, 0xD2, 0xCA, \
    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }

#define MBEDTLS_DHM_RFC3526_MODP_3072_G_BIN { 0x02 }

#define MBEDTLS_DHM_RFC3526_MODP_4096_P_BIN  {       \
    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,  \
    0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,  \
    0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,  \
    0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,  \
    0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22,  \
    0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,  \
    0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B,  \
    0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,  \
    0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,  \
    0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,  \
    0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B,  \
    0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,  \
    0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5,  \
    0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,  \
    0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D,  \
    0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,  \
    0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A,  \
    0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,  \
    0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96,  \
    0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,  \
    0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D,  \
    0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,  \
    0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C,  \
    0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,  \
    0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03,  \
    0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,  \
    0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9,  \
    0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,  \
    0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5,  \
    0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,  \
    0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D,  \
    0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,  \
    0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64,  \
    0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,  \
    0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D,  \
    0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,  \
    0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7,  \
    0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,  \
    0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B,  \
    0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,  \
    0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64,  \
    0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,  \
    0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C,  \
    0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,  \
    0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31,  \
    0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,  \
    0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01,  \
    0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,  \
    0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26,  \
    0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,  \
    0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA,  \
    0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,  \
    0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9,  \
    0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,  \
    0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D,  \
    0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,  \
    0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED,  \
    0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,  \
    0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C,  \
    0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,  \
    0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1,  \
    0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,  \
    0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x06, 0x31, 0x99,  \
    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }

#define MBEDTLS_DHM_RFC3526_MODP_4096_G_BIN { 0x02 }

#define MBEDTLS_DHM_RFC7919_FFDHE2048_P_BIN {        \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, \
     0xAD, 0xF8, 0x54, 0x58, 0xA2, 0xBB, 0x4A, 0x9A, \
     0xAF, 0xDC, 0x56, 0x20, 0x27, 0x3D, 0x3C, 0xF1, \
     0xD8, 0xB9, 0xC5, 0x83, 0xCE, 0x2D, 0x36, 0x95, \
     0xA9, 0xE1, 0x36, 0x41, 0x14, 0x64, 0x33, 0xFB, \
     0xCC, 0x93, 0x9D, 0xCE, 0x24, 0x9B, 0x3E, 0xF9, \
     0x7D, 0x2F, 0xE3, 0x63, 0x63, 0x0C, 0x75, 0xD8, \
     0xF6, 0x81, 0xB2, 0x02, 0xAE, 0xC4, 0x61, 0x7A, \
     0xD3, 0xDF, 0x1E, 0xD5, 0xD5, 0xFD, 0x65, 0x61, \
     0x24, 0x33, 0xF5, 0x1F, 0x5F, 0x06, 0x6E, 0xD0, \
     0x85, 0x63, 0x65, 0x55, 0x3D, 0xED, 0x1A, 0xF3, \
     0xB5, 0x57, 0x13, 0x5E, 0x7F, 0x57, 0xC9, 0x35, \
     0x98, 0x4F, 0x0C, 0x70, 0xE0, 0xE6, 0x8B, 0x77, \
     0xE2, 0xA6, 0x89, 0xDA, 0xF3, 0xEF, 0xE8, 0x72, \
     0x1D, 0xF1, 0x58, 0xA1, 0x36, 0xAD, 0xE7, 0x35, \
     0x30, 0xAC, 0xCA, 0x4F, 0x48, 0x3A, 0x79, 0x7A, \
     0xBC, 0x0A, 0xB1, 0x82, 0xB3, 0x24, 0xFB, 0x61, \
     0xD1, 0x08, 0xA9, 0x4B, 0xB2, 0xC8, 0xE3, 0xFB, \
     0xB9, 0x6A, 0xDA, 0xB7, 0x60, 0xD7, 0xF4, 0x68, \
     0x1D, 0x4F, 0x42, 0xA3, 0xDE, 0x39, 0x4D, 0xF4, \
     0xAE, 0x56, 0xED, 0xE7, 0x63, 0x72, 0xBB, 0x19, \
     0x0B, 0x07, 0xA7, 0xC8, 0xEE, 0x0A, 0x6D, 0x70, \
     0x9E, 0x02, 0xFC, 0xE1, 0xCD, 0xF7, 0xE2, 0xEC, \
     0xC0, 0x34, 0x04, 0xCD, 0x28, 0x34, 0x2F, 0x61, \
     0x91, 0x72, 0xFE, 0x9C, 0xE9, 0x85, 0x83, 0xFF, \
     0x8E, 0x4F, 0x12, 0x32, 0xEE, 0xF2, 0x81, 0x83, \
     0xC3, 0xFE, 0x3B, 0x1B, 0x4C, 0x6F, 0xAD, 0x73, \
     0x3B, 0xB5, 0xFC, 0xBC, 0x2E, 0xC2, 0x20, 0x05, \
     0xC5, 0x8E, 0xF1, 0x83, 0x7D, 0x16, 0x83, 0xB2, \
     0xC6, 0xF3, 0x4A, 0x26, 0xC1, 0xB2, 0xEF, 0xFA, \
     0x88, 0x6B, 0x42, 0x38, 0x61, 0x28, 0x5C, 0x97, \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, }

#define MBEDTLS_DHM_RFC7919_FFDHE2048_G_BIN { 0x02 }

#define MBEDTLS_DHM_RFC7919_FFDHE3072_P_BIN { \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, \
     0xAD, 0xF8, 0x54, 0x58, 0xA2, 0xBB, 0x4A, 0x9A, \
     0xAF, 0xDC, 0x56, 0x20, 0x27, 0x3D, 0x3C, 0xF1, \
     0xD8, 0xB9, 0xC5, 0x83, 0xCE, 0x2D, 0x36, 0x95, \
     0xA9, 0xE1, 0x36, 0x41, 0x14, 0x64, 0x33, 0xFB, \
     0xCC, 0x93, 0x9D, 0xCE, 0x24, 0x9B, 0x3E, 0xF9, \
     0x7D, 0x2F, 0xE3, 0x63, 0x63, 0x0C, 0x75, 0xD8, \
     0xF6, 0x81, 0xB2, 0x02, 0xAE, 0xC4, 0x61, 0x7A, \
     0xD3, 0xDF, 0x1E, 0xD5, 0xD5, 0xFD, 0x65, 0x61, \
     0x24, 0x33, 0xF5, 0x1F, 0x5F, 0x06, 0x6E, 0xD0, \
     0x85, 0x63, 0x65, 0x55, 0x3D, 0xED, 0x1A, 0xF3, \
     0xB5, 0x57, 0x13, 0x5E, 0x7F, 0x57, 0xC9, 0x35, \
     0x98, 0x4F, 0x0C, 0x70, 0xE0, 0xE6, 0x8B, 0x77, \
     0xE2, 0xA6, 0x89, 0xDA, 0xF3, 0xEF, 0xE8, 0x72, \
     0x1D, 0xF1, 0x58, 0xA1, 0x36, 0xAD, 0xE7, 0x35, \
     0x30, 0xAC, 0xCA, 0x4F, 0x48, 0x3A, 0x79, 0x7A, \
     0xBC, 0x0A, 0xB1, 0x82, 0xB3, 0x24, 0xFB, 0x61, \
     0xD1, 0x08, 0xA9, 0x4B, 0xB2, 0xC8, 0xE3, 0xFB, \
     0xB9, 0x6A, 0xDA, 0xB7, 0x60, 0xD7, 0xF4, 0x68, \
     0x1D, 0x4F, 0x42, 0xA3, 0xDE, 0x39, 0x4D, 0xF4, \
     0xAE, 0x56, 0xED, 0xE7, 0x63, 0x72, 0xBB, 0x19, \
     0x0B, 0x07, 0xA7, 0xC8, 0xEE, 0x0A, 0x6D, 0x70, \
     0x9E, 0x02, 0xFC, 0xE1, 0xCD, 0xF7, 0xE2, 0xEC, \
     0xC0, 0x34, 0x04, 0xCD, 0x28, 0x34, 0x2F, 0x61, \
     0x91, 0x72, 0xFE, 0x9C, 0xE9, 0x85, 0x83, 0xFF, \
     0x8E, 0x4F, 0x12, 0x32, 0xEE, 0xF2, 0x81, 0x83, \
     0xC3, 0xFE, 0x3B, 0x1B, 0x4C, 0x6F, 0xAD, 0x73, \
     0x3B, 0xB5, 0xFC, 0xBC, 0x2E, 0xC2, 0x20, 0x05, \
     0xC5, 0x8E, 0xF1, 0x83, 0x7D, 0x16, 0x83, 0xB2, \
     0xC6, 0xF3, 0x4A, 0x26, 0xC1, 0xB2, 0xEF, 0xFA, \
     0x88, 0x6B, 0x42, 0x38, 0x61, 0x1F, 0xCF, 0xDC, \
     0xDE, 0x35, 0x5B, 0x3B, 0x65, 0x19, 0x03, 0x5B, \
     0xBC, 0x34, 0xF4, 0xDE, 0xF9, 0x9C, 0x02, 0x38, \
     0x61, 0xB4, 0x6F, 0xC9, 0xD6, 0xE6, 0xC9, 0x07, \
     0x7A, 0xD9, 0x1D, 0x26, 0x91, 0xF7, 0xF7, 0xEE, \
     0x59, 0x8C, 0xB0, 0xFA, 0xC1, 0x86, 0xD9, 0x1C, \
     0xAE, 0xFE, 0x13, 0x09, 0x85, 0x13, 0x92, 0x70, \
     0xB4, 0x13, 0x0C, 0x93, 0xBC, 0x43, 0x79, 0x44, \
     0xF4, 0xFD, 0x44, 0x52, 0xE2, 0xD7, 0x4D, 0xD3, \
     0x64, 0xF2, 0xE2, 0x1E, 0x71, 0xF5, 0x4B, 0xFF, \
     0x5C, 0xAE, 0x82, 0xAB, 0x9C, 0x9D, 0xF6, 0x9E, \
     0xE8, 0x6D, 0x2B, 0xC5, 0x22, 0x36, 0x3A, 0x0D, \
     0xAB, 0xC5, 0x21, 0x97, 0x9B, 0x0D, 0xEA, 0xDA, \
     0x1D, 0xBF, 0x9A, 0x42, 0xD5, 0xC4, 0x48, 0x4E, \
     0x0A, 0xBC, 0xD0, 0x6B, 0xFA, 0x53, 0xDD, 0xEF, \
     0x3C, 0x1B, 0x20, 0xEE, 0x3F, 0xD5, 0x9D, 0x7C, \
     0x25, 0xE4, 0x1D, 0x2B, 0x66, 0xC6, 0x2E, 0x37, \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }

#define MBEDTLS_DHM_RFC7919_FFDHE3072_G_BIN { 0x02 }

#define MBEDTLS_DHM_RFC7919_FFDHE4096_P_BIN {        \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, \
     0xAD, 0xF8, 0x54, 0x58, 0xA2, 0xBB, 0x4A, 0x9A, \
     0xAF, 0xDC, 0x56, 0x20, 0x27, 0x3D, 0x3C, 0xF1, \
     0xD8, 0xB9, 0xC5, 0x83, 0xCE, 0x2D, 0x36, 0x95, \
     0xA9, 0xE1, 0x36, 0x41, 0x14, 0x64, 0x33, 0xFB, \
     0xCC, 0x93, 0x9D, 0xCE, 0x24, 0x9B, 0x3E, 0xF9, \
     0x7D, 0x2F, 0xE3, 0x63, 0x63, 0x0C, 0x75, 0xD8, \
     0xF6, 0x81, 0xB2, 0x02, 0xAE, 0xC4, 0x61, 0x7A, \
     0xD3, 0xDF, 0x1E, 0xD5, 0xD5, 0xFD, 0x65, 0x61, \
     0x24, 0x33, 0xF5, 0x1F, 0x5F, 0x06, 0x6E, 0xD0, \
     0x85, 0x63, 0x65, 0x55, 0x3D, 0xED, 0x1A, 0xF3, \
     0xB5, 0x57, 0x13, 0x5E, 0x7F, 0x57, 0xC9, 0x35, \
     0x98, 0x4F, 0x0C, 0x70, 0xE0, 0xE6, 0x8B, 0x77, \
     0xE2, 0xA6, 0x89, 0xDA, 0xF3, 0xEF, 0xE8, 0x72, \
     0x1D, 0xF1, 0x58, 0xA1, 0x36, 0xAD, 0xE7, 0x35, \
     0x30, 0xAC, 0xCA, 0x4F, 0x48, 0x3A, 0x79, 0x7A, \
     0xBC, 0x0A, 0xB1, 0x82, 0xB3, 0x24, 0xFB, 0x61, \
     0xD1, 0x08, 0xA9, 0x4B, 0xB2, 0xC8, 0xE3, 0xFB, \
     0xB9, 0x6A, 0xDA, 0xB7, 0x60, 0xD7, 0xF4, 0x68, \
     0x1D, 0x4F, 0x42, 0xA3, 0xDE, 0x39, 0x4D, 0xF4, \
     0xAE, 0x56, 0xED, 0xE7, 0x63, 0x72, 0xBB, 0x19, \
     0x0B, 0x07, 0xA7, 0xC8, 0xEE, 0x0A, 0x6D, 0x70, \
     0x9E, 0x02, 0xFC, 0xE1, 0xCD, 0xF7, 0xE2, 0xEC, \
     0xC0, 0x34, 0x04, 0xCD, 0x28, 0x34, 0x2F, 0x61, \
     0x91, 0x72, 0xFE, 0x9C, 0xE9, 0x85, 0x83, 0xFF, \
     0x8E, 0x4F, 0x12, 0x32, 0xEE, 0xF2, 0x81, 0x83, \
     0xC3, 0xFE, 0x3B, 0x1B, 0x4C, 0x6F, 0xAD, 0x73, \
     0x3B, 0xB5, 0xFC, 0xBC, 0x2E, 0xC2, 0x20, 0x05, \
     0xC5, 0x8E, 0xF1, 0x83, 0x7D, 0x16, 0x83, 0xB2, \
     0xC6, 0xF3, 0x4A, 0x26, 0xC1, 0xB2, 0xEF, 0xFA, \
     0x88, 0x6B, 0x42, 0x38, 0x61, 0x1F, 0xCF, 0xDC, \
     0xDE, 0x35, 0x5B, 0x3B, 0x65, 0x19, 0x03, 0x5B, \
     0xBC, 0x34, 0xF4, 0xDE, 0xF9, 0x9C, 0x02, 0x38, \
     0x61, 0xB4, 0x6F, 0xC9, 0xD6, 0xE6, 0xC9, 0x07, \
     0x7A, 0xD9, 0x1D, 0x26, 0x91, 0xF7, 0xF7, 0xEE, \
     0x59, 0x8C, 0xB0, 0xFA, 0xC1, 0x86, 0xD9, 0x1C, \
     0xAE, 0xFE, 0x13, 0x09, 0x85, 0x13, 0x92, 0x70, \
     0xB4, 0x13, 0x0C, 0x93, 0xBC, 0x43, 0x79, 0x44, \
     0xF4, 0xFD, 0x44, 0x52, 0xE2, 0xD7, 0x4D, 0xD3, \
     0x64, 0xF2, 0xE2, 0x1E, 0x71, 0xF5, 0x4B, 0xFF, \
     0x5C, 0xAE, 0x82, 0xAB, 0x9C, 0x9D, 0xF6, 0x9E, \
     0xE8, 0x6D, 0x2B, 0xC5, 0x22, 0x36, 0x3A, 0x0D, \
     0xAB, 0xC5, 0x21, 0x97, 0x9B, 0x0D, 0xEA, 0xDA, \
     0x1D, 0xBF, 0x9A, 0x42, 0xD5, 0xC4, 0x48, 0x4E, \
     0x0A, 0xBC, 0xD0, 0x6B, 0xFA, 0x53, 0xDD, 0xEF, \
     0x3C, 0x1B, 0x20, 0xEE, 0x3F, 0xD5, 0x9D, 0x7C, \
     0x25, 0xE4, 0x1D, 0x2B, 0x66, 0x9E, 0x1E, 0xF1, \
     0x6E, 0x6F, 0x52, 0xC3, 0x16, 0x4D, 0xF4, 0xFB, \
     0x79, 0x30, 0xE9, 0xE4, 0xE5, 0x88, 0x57, 0xB6, \
     0xAC, 0x7D, 0x5F, 0x42, 0xD6, 0x9F, 0x6D, 0x18, \
     0x77, 0x63, 0xCF, 0x1D, 0x55, 0x03, 0x40, 0x04, \
     0x87, 0xF5, 0x5B, 0xA5, 0x7E, 0x31, 0xCC, 0x7A, \
     0x71, 0x35, 0xC8, 0x86, 0xEF, 0xB4, 0x31, 0x8A, \
     0xED, 0x6A, 0x1E, 0x01, 0x2D, 0x9E, 0x68, 0x32, \
     0xA9, 0x07, 0x60, 0x0A, 0x91, 0x81, 0x30, 0xC4, \
     0x6D, 0xC7, 0x78, 0xF9, 0x71, 0xAD, 0x00, 0x38, \
     0x09, 0x29, 0x99, 0xA3, 0x33, 0xCB, 0x8B, 0x7A, \
     0x1A, 0x1D, 0xB9, 0x3D, 0x71, 0x40, 0x00, 0x3C, \
     0x2A, 0x4E, 0xCE, 0xA9, 0xF9, 0x8D, 0x0A, 0xCC, \
     0x0A, 0x82, 0x91, 0xCD, 0xCE, 0xC9, 0x7D, 0xCF, \
     0x8E, 0xC9, 0xB5, 0x5A, 0x7F, 0x88, 0xA4, 0x6B, \
     0x4D, 0xB5, 0xA8, 0x51, 0xF4, 0x41, 0x82, 0xE1, \
     0xC6, 0x8A, 0x00, 0x7E, 0x5E, 0x65, 0x5F, 0x6A, \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }

#define MBEDTLS_DHM_RFC7919_FFDHE4096_G_BIN { 0x02 }

#define MBEDTLS_DHM_RFC7919_FFDHE6144_P_BIN {        \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, \
     0xAD, 0xF8, 0x54, 0x58, 0xA2, 0xBB, 0x4A, 0x9A, \
     0xAF, 0xDC, 0x56, 0x20, 0x27, 0x3D, 0x3C, 0xF1, \
     0xD8, 0xB9, 0xC5, 0x83, 0xCE, 0x2D, 0x36, 0x95, \
     0xA9, 0xE1, 0x36, 0x41, 0x14, 0x64, 0x33, 0xFB, \
     0xCC, 0x93, 0x9D, 0xCE, 0x24, 0x9B, 0x3E, 0xF9, \
     0x7D, 0x2F, 0xE3, 0x63, 0x63, 0x0C, 0x75, 0xD8, \
     0xF6, 0x81, 0xB2, 0x02, 0xAE, 0xC4, 0x61, 0x7A, \
     0xD3, 0xDF, 0x1E, 0xD5, 0xD5, 0xFD, 0x65, 0x61, \
     0x24, 0x33, 0xF5, 0x1F, 0x5F, 0x06, 0x6E, 0xD0, \
     0x85, 0x63, 0x65, 0x55, 0x3D, 0xED, 0x1A, 0xF3, \
     0xB5, 0x57, 0x13, 0x5E, 0x7F, 0x57, 0xC9, 0x35, \
     0x98, 0x4F, 0x0C, 0x70, 0xE0, 0xE6, 0x8B, 0x77, \
     0xE2, 0xA6, 0x89, 0xDA, 0xF3, 0xEF, 0xE8, 0x72, \
     0x1D, 0xF1, 0x58, 0xA1, 0x36, 0xAD, 0xE7, 0x35, \
     0x30, 0xAC, 0xCA, 0x4F, 0x48, 0x3A, 0x79, 0x7A, \
     0xBC, 0x0A, 0xB1, 0x82, 0xB3, 0x24, 0xFB, 0x61, \
     0xD1, 0x08, 0xA9, 0x4B, 0xB2, 0xC8, 0xE3, 0xFB, \
     0xB9, 0x6A, 0xDA, 0xB7, 0x60, 0xD7, 0xF4, 0x68, \
     0x1D, 0x4F, 0x42, 0xA3, 0xDE, 0x39, 0x4D, 0xF4, \
     0xAE, 0x56, 0xED, 0xE7, 0x63, 0x72, 0xBB, 0x19, \
     0x0B, 0x07, 0xA7, 0xC8, 0xEE, 0x0A, 0x6D, 0x70, \
     0x9E, 0x02, 0xFC, 0xE1, 0xCD, 0xF7, 0xE2, 0xEC, \
     0xC0, 0x34, 0x04, 0xCD, 0x28, 0x34, 0x2F, 0x61, \
     0x91, 0x72, 0xFE, 0x9C, 0xE9, 0x85, 0x83, 0xFF, \
     0x8E, 0x4F, 0x12, 0x32, 0xEE, 0xF2, 0x81, 0x83, \
     0xC3, 0xFE, 0x3B, 0x1B, 0x4C, 0x6F, 0xAD, 0x73, \
     0x3B, 0xB5, 0xFC, 0xBC, 0x2E, 0xC2, 0x20, 0x05, \
     0xC5, 0x8E, 0xF1, 0x83, 0x7D, 0x16, 0x83, 0xB2, \
     0xC6, 0xF3, 0x4A, 0x26, 0xC1, 0xB2, 0xEF, 0xFA, \
     0x88, 0x6B, 0x42, 0x38, 0x61, 0x1F, 0xCF, 0xDC, \
     0xDE, 0x35, 0x5B, 0x3B, 0x65, 0x19, 0x03, 0x5B, \
     0xBC, 0x34, 0xF4, 0xDE, 0xF9, 0x9C, 0x02, 0x38, \
     0x61, 0xB4, 0x6F, 0xC9, 0xD6, 0xE6, 0xC9, 0x07, \
     0x7A, 0xD9, 0x1D, 0x26, 0x91, 0xF7, 0xF7, 0xEE, \
     0x59, 0x8C, 0xB0, 0xFA, 0xC1, 0x86, 0xD9, 0x1C, \
     0xAE, 0xFE, 0x13, 0x09, 0x85, 0x13, 0x92, 0x70, \
     0xB4, 0x13, 0x0C, 0x93, 0xBC, 0x43, 0x79, 0x44, \
     0xF4, 0xFD, 0x44, 0x52, 0xE2, 0xD7, 0x4D, 0xD3, \
     0x64, 0xF2, 0xE2, 0x1E, 0x71, 0xF5, 0x4B, 0xFF, \
     0x5C, 0xAE, 0x82, 0xAB, 0x9C, 0x9D, 0xF6, 0x9E, \
     0xE8, 0x6D, 0x2B, 0xC5, 0x22, 0x36, 0x3A, 0x0D, \
     0xAB, 0xC5, 0x21, 0x97, 0x9B, 0x0D, 0xEA, 0xDA, \
     0x1D, 0xBF, 0x9A, 0x42, 0xD5, 0xC4, 0x48, 0x4E, \
     0x0A, 0xBC, 0xD0, 0x6B, 0xFA, 0x53, 0xDD, 0xEF, \
     0x3C, 0x1B, 0x20, 0xEE, 0x3F, 0xD5, 0x9D, 0x7C, \
     0x25, 0xE4, 0x1D, 0x2B, 0x66, 0x9E, 0x1E, 0xF1, \
     0x6E, 0x6F, 0x52, 0xC3, 0x16, 0x4D, 0xF4, 0xFB, \
     0x79, 0x30, 0xE9, 0xE4, 0xE5, 0x88, 0x57, 0xB6, \
     0xAC, 0x7D, 0x5F, 0x42, 0xD6, 0x9F, 0x6D, 0x18, \
     0x77, 0x63, 0xCF, 0x1D, 0x55, 0x03, 0x40, 0x04, \
     0x87, 0xF5, 0x5B, 0xA5, 0x7E, 0x31, 0xCC, 0x7A, \
     0x71, 0x35, 0xC8, 0x86, 0xEF, 0xB4, 0x31, 0x8A, \
     0xED, 0x6A, 0x1E, 0x01, 0x2D, 0x9E, 0x68, 0x32, \
     0xA9, 0x07, 0x60, 0x0A, 0x91, 0x81, 0x30, 0xC4, \
     0x6D, 0xC7, 0x78, 0xF9, 0x71, 0xAD, 0x00, 0x38, \
     0x09, 0x29, 0x99, 0xA3, 0x33, 0xCB, 0x8B, 0x7A, \
     0x1A, 0x1D, 0xB9, 0x3D, 0x71, 0x40, 0x00, 0x3C, \
     0x2A, 0x4E, 0xCE, 0xA9, 0xF9, 0x8D, 0x0A, 0xCC, \
     0x0A, 0x82, 0x91, 0xCD, 0xCE, 0xC9, 0x7D, 0xCF, \
     0x8E, 0xC9, 0xB5, 0x5A, 0x7F, 0x88, 0xA4, 0x6B, \
     0x4D, 0xB5, 0xA8, 0x51, 0xF4, 0x41, 0x82, 0xE1, \
     0xC6, 0x8A, 0x00, 0x7E, 0x5E, 0x0D, 0xD9, 0x02, \
     0x0B, 0xFD, 0x64, 0xB6, 0x45, 0x03, 0x6C, 0x7A, \
     0x4E, 0x67, 0x7D, 0x2C, 0x38, 0x53, 0x2A, 0x3A, \
     0x23, 0xBA, 0x44, 0x42, 0xCA, 0xF5, 0x3E, 0xA6, \
     0x3B, 0xB4, 0x54, 0x32, 0x9B, 0x76, 0x24, 0xC8, \
     0x91, 0x7B, 0xDD, 0x64, 0xB1, 0xC0, 0xFD, 0x4C, \
     0xB3, 0x8E, 0x8C, 0x33, 0x4C, 0x70, 0x1C, 0x3A, \
     0xCD, 0xAD, 0x06, 0x57, 0xFC, 0xCF, 0xEC, 0x71, \
     0x9B, 0x1F, 0x5C, 0x3E, 0x4E, 0x46, 0x04, 0x1F, \
     0x38, 0x81, 0x47, 0xFB, 0x4C, 0xFD, 0xB4, 0x77, \
     0xA5, 0x24, 0x71, 0xF7, 0xA9, 0xA9, 0x69, 0x10, \
     0xB8, 0x55, 0x32, 0x2E, 0xDB, 0x63, 0x40, 0xD8, \
     0xA0, 0x0E, 0xF0, 0x92, 0x35, 0x05, 0x11, 0xE3, \
     0x0A, 0xBE, 0xC1, 0xFF, 0xF9, 0xE3, 0xA2, 0x6E, \
     0x7F, 0xB2, 0x9F, 0x8C, 0x18, 0x30, 0x23, 0xC3, \
     0x58, 0x7E, 0x38, 0xDA, 0x00, 0x77, 0xD9, 0xB4, \
     0x76, 0x3E, 0x4E, 0x4B, 0x94, 0xB2, 0xBB, 0xC1, \
     0x94, 0xC6, 0x65, 0x1E, 0x77, 0xCA, 0xF9, 0x92, \
     0xEE, 0xAA, 0xC0, 0x23, 0x2A, 0x28, 0x1B, 0xF6, \
     0xB3, 0xA7, 0x39, 0xC1, 0x22, 0x61, 0x16, 0x82, \
     0x0A, 0xE8, 0xDB, 0x58, 0x47, 0xA6, 0x7C, 0xBE, \
     0xF9, 0xC9, 0x09, 0x1B, 0x46, 0x2D, 0x53, 0x8C, \
     0xD7, 0x2B, 0x03, 0x74, 0x6A, 0xE7, 0x7F, 0x5E, \
     0x62, 0x29, 0x2C, 0x31, 0x15, 0x62, 0xA8, 0x46, \
     0x50, 0x5D, 0xC8, 0x2D, 0xB8, 0x54, 0x33, 0x8A, \
     0xE4, 0x9F, 0x52, 0x35, 0xC9, 0x5B, 0x91, 0x17, \
     0x8C, 0xCF, 0x2D, 0xD5, 0xCA, 0xCE, 0xF4, 0x03, \
     0xEC, 0x9D, 0x18, 0x10, 0xC6, 0x27, 0x2B, 0x04, \
     0x5B, 0x3B, 0x71, 0xF9, 0xDC, 0x6B, 0x80, 0xD6, \
     0x3F, 0xDD, 0x4A, 0x8E, 0x9A, 0xDB, 0x1E, 0x69, \
     0x62, 0xA6, 0x95, 0x26, 0xD4, 0x31, 0x61, 0xC1, \
     0xA4, 0x1D, 0x57, 0x0D, 0x79, 0x38, 0xDA, 0xD4, \
     0xA4, 0x0E, 0x32, 0x9C, 0xD0, 0xE4, 0x0E, 0x65, \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }

#define MBEDTLS_DHM_RFC7919_FFDHE6144_G_BIN { 0x02 }

#define MBEDTLS_DHM_RFC7919_FFDHE8192_P_BIN {        \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, \
     0xAD, 0xF8, 0x54, 0x58, 0xA2, 0xBB, 0x4A, 0x9A, \
     0xAF, 0xDC, 0x56, 0x20, 0x27, 0x3D, 0x3C, 0xF1, \
     0xD8, 0xB9, 0xC5, 0x83, 0xCE, 0x2D, 0x36, 0x95, \
     0xA9, 0xE1, 0x36, 0x41, 0x14, 0x64, 0x33, 0xFB, \
     0xCC, 0x93, 0x9D, 0xCE, 0x24, 0x9B, 0x3E, 0xF9, \
     0x7D, 0x2F, 0xE3, 0x63, 0x63, 0x0C, 0x75, 0xD8, \
     0xF6, 0x81, 0xB2, 0x02, 0xAE, 0xC4, 0x61, 0x7A, \
     0xD3, 0xDF, 0x1E, 0xD5, 0xD5, 0xFD, 0x65, 0x61, \
     0x24, 0x33, 0xF5, 0x1F, 0x5F, 0x06, 0x6E, 0xD0, \
     0x85, 0x63, 0x65, 0x55, 0x3D, 0xED, 0x1A, 0xF3, \
     0xB5, 0x57, 0x13, 0x5E, 0x7F, 0x57, 0xC9, 0x35, \
     0x98, 0x4F, 0x0C, 0x70, 0xE0, 0xE6, 0x8B, 0x77, \
     0xE2, 0xA6, 0x89, 0xDA, 0xF3, 0xEF, 0xE8, 0x72, \
     0x1D, 0xF1, 0x58, 0xA1, 0x36, 0xAD, 0xE7, 0x35, \
     0x30, 0xAC, 0xCA, 0x4F, 0x48, 0x3A, 0x79, 0x7A, \
     0xBC, 0x0A, 0xB1, 0x82, 0xB3, 0x24, 0xFB, 0x61, \
     0xD1, 0x08, 0xA9, 0x4B, 0xB2, 0xC8, 0xE3, 0xFB, \
     0xB9, 0x6A, 0xDA, 0xB7, 0x60, 0xD7, 0xF4, 0x68, \
     0x1D, 0x4F, 0x42, 0xA3, 0xDE, 0x39, 0x4D, 0xF4, \
     0xAE, 0x56, 0xED, 0xE7, 0x63, 0x72, 0xBB, 0x19, \
     0x0B, 0x07, 0xA7, 0xC8, 0xEE, 0x0A, 0x6D, 0x70, \
     0x9E, 0x02, 0xFC, 0xE1, 0xCD, 0xF7, 0xE2, 0xEC, \
     0xC0, 0x34, 0x04, 0xCD, 0x28, 0x34, 0x2F, 0x61, \
     0x91, 0x72, 0xFE, 0x9C, 0xE9, 0x85, 0x83, 0xFF, \
     0x8E, 0x4F, 0x12, 0x32, 0xEE, 0xF2, 0x81, 0x83, \
     0xC3, 0xFE, 0x3B, 0x1B, 0x4C, 0x6F, 0xAD, 0x73, \
     0x3B, 0xB5, 0xFC, 0xBC, 0x2E, 0xC2, 0x20, 0x05, \
     0xC5, 0x8E, 0xF1, 0x83, 0x7D, 0x16, 0x83, 0xB2, \
     0xC6, 0xF3, 0x4A, 0x26, 0xC1, 0xB2, 0xEF, 0xFA, \
     0x88, 0x6B, 0x42, 0x38, 0x61, 0x1F, 0xCF, 0xDC, \
     0xDE, 0x35, 0x5B, 0x3B, 0x65, 0x19, 0x03, 0x5B, \
     0xBC, 0x34, 0xF4, 0xDE, 0xF9, 0x9C, 0x02, 0x38, \
     0x61, 0xB4, 0x6F, 0xC9, 0xD6, 0xE6, 0xC9, 0x07, \
     0x7A, 0xD9, 0x1D, 0x26, 0x91, 0xF7, 0xF7, 0xEE, \
     0x59, 0x8C, 0xB0, 0xFA, 0xC1, 0x86, 0xD9, 0x1C, \
     0xAE, 0xFE, 0x13, 0x09, 0x85, 0x13, 0x92, 0x70, \
     0xB4, 0x13, 0x0C, 0x93, 0xBC, 0x43, 0x79, 0x44, \
     0xF4, 0xFD, 0x44, 0x52, 0xE2, 0xD7, 0x4D, 0xD3, \
     0x64, 0xF2, 0xE2, 0x1E, 0x71, 0xF5, 0x4B, 0xFF, \
     0x5C, 0xAE, 0x82, 0xAB, 0x9C, 0x9D, 0xF6, 0x9E, \
     0xE8, 0x6D, 0x2B, 0xC5, 0x22, 0x36, 0x3A, 0x0D, \
     0xAB, 0xC5, 0x21, 0x97, 0x9B, 0x0D, 0xEA, 0xDA, \
     0x1D, 0xBF, 0x9A, 0x42, 0xD5, 0xC4, 0x48, 0x4E, \
     0x0A, 0xBC, 0xD0, 0x6B, 0xFA, 0x53, 0xDD, 0xEF, \
     0x3C, 0x1B, 0x20, 0xEE, 0x3F, 0xD5, 0x9D, 0x7C, \
     0x25, 0xE4, 0x1D, 0x2B, 0x66, 0x9E, 0x1E, 0xF1, \
     0x6E, 0x6F, 0x52, 0xC3, 0x16, 0x4D, 0xF4, 0xFB, \
     0x79, 0x30, 0xE9, 0xE4, 0xE5, 0x88, 0x57, 0xB6, \
     0xAC, 0x7D, 0x5F, 0x42, 0xD6, 0x9F, 0x6D, 0x18, \
     0x77, 0x63, 0xCF, 0x1D, 0x55, 0x03, 0x40, 0x04, \
     0x87, 0xF5, 0x5B, 0xA5, 0x7E, 0x31, 0xCC, 0x7A, \
     0x71, 0x35, 0xC8, 0x86, 0xEF, 0xB4, 0x31, 0x8A, \
     0xED, 0x6A, 0x1E, 0x01, 0x2D, 0x9E, 0x68, 0x32, \
     0xA9, 0x07, 0x60, 0x0A, 0x91, 0x81, 0x30, 0xC4, \
     0x6D, 0xC7, 0x78, 0xF9, 0x71, 0xAD, 0x00, 0x38, \
     0x09, 0x29, 0x99, 0xA3, 0x33, 0xCB, 0x8B, 0x7A, \
     0x1A, 0x1D, 0xB9, 0x3D, 0x71, 0x40, 0x00, 0x3C, \
     0x2A, 0x4E, 0xCE, 0xA9, 0xF9, 0x8D, 0x0A, 0xCC, \
     0x0A, 0x82, 0x91, 0xCD, 0xCE, 0xC9, 0x7D, 0xCF, \
     0x8E, 0xC9, 0xB5, 0x5A, 0x7F, 0x88, 0xA4, 0x6B, \
     0x4D, 0xB5, 0xA8, 0x51, 0xF4, 0x41, 0x82, 0xE1, \
     0xC6, 0x8A, 0x00, 0x7E, 0x5E, 0x0D, 0xD9, 0x02, \
     0x0B, 0xFD, 0x64, 0xB6, 0x45, 0x03, 0x6C, 0x7A, \
     0x4E, 0x67, 0x7D, 0x2C, 0x38, 0x53, 0x2A, 0x3A, \
     0x23, 0xBA, 0x44, 0x42, 0xCA, 0xF5, 0x3E, 0xA6, \
     0x3B, 0xB4, 0x54, 0x32, 0x9B, 0x76, 0x24, 0xC8, \
     0x91, 0x7B, 0xDD, 0x64, 0xB1, 0xC0, 0xFD, 0x4C, \
     0xB3, 0x8E, 0x8C, 0x33, 0x4C, 0x70, 0x1C, 0x3A, \
     0xCD, 0xAD, 0x06, 0x57, 0xFC, 0xCF, 0xEC, 0x71, \
     0x9B, 0x1F, 0x5C, 0x3E, 0x4E, 0x46, 0x04, 0x1F, \
     0x38, 0x81, 0x47, 0xFB, 0x4C, 0xFD, 0xB4, 0x77, \
     0xA5, 0x24, 0x71, 0xF7, 0xA9, 0xA9, 0x69, 0x10, \
     0xB8, 0x55, 0x32, 0x2E, 0xDB, 0x63, 0x40, 0xD8, \
     0xA0, 0x0E, 0xF0, 0x92, 0x35, 0x05, 0x11, 0xE3, \
     0x0A, 0xBE, 0xC1, 0xFF, 0xF9, 0xE3, 0xA2, 0x6E, \
     0x7F, 0xB2, 0x9F, 0x8C, 0x18, 0x30, 0x23, 0xC3, \
     0x58, 0x7E, 0x38, 0xDA, 0x00, 0x77, 0xD9, 0xB4, \
     0x76, 0x3E, 0x4E, 0x4B, 0x94, 0xB2, 0xBB, 0xC1, \
     0x94, 0xC6, 0x65, 0x1E, 0x77, 0xCA, 0xF9, 0x92, \
     0xEE, 0xAA, 0xC0, 0x23, 0x2A, 0x28, 0x1B, 0xF6, \
     0xB3, 0xA7, 0x39, 0xC1, 0x22, 0x61, 0x16, 0x82, \
     0x0A, 0xE8, 0xDB, 0x58, 0x47, 0xA6, 0x7C, 0xBE, \
     0xF9, 0xC9, 0x09, 0x1B, 0x46, 0x2D, 0x53, 0x8C, \
     0xD7, 0x2B, 0x03, 0x74, 0x6A, 0xE7, 0x7F, 0x5E, \
     0x62, 0x29, 0x2C, 0x31, 0x15, 0x62, 0xA8, 0x46, \
     0x50, 0x5D, 0xC8, 0x2D, 0xB8, 0x54, 0x33, 0x8A, \
     0xE4, 0x9F, 0x52, 0x35, 0xC9, 0x5B, 0x91, 0x17, \
     0x8C, 0xCF, 0x2D, 0xD5, 0xCA, 0xCE, 0xF4, 0x03, \
     0xEC, 0x9D, 0x18, 0x10, 0xC6, 0x27, 0x2B, 0x04, \
     0x5B, 0x3B, 0x71, 0xF9, 0xDC, 0x6B, 0x80, 0xD6, \
     0x3F, 0xDD, 0x4A, 0x8E, 0x9A, 0xDB, 0x1E, 0x69, \
     0x62, 0xA6, 0x95, 0x26, 0xD4, 0x31, 0x61, 0xC1, \
     0xA4, 0x1D, 0x57, 0x0D, 0x79, 0x38, 0xDA, 0xD4, \
     0xA4, 0x0E, 0x32, 0x9C, 0xCF, 0xF4, 0x6A, 0xAA, \
     0x36, 0xAD, 0x00, 0x4C, 0xF6, 0x00, 0xC8, 0x38, \
     0x1E, 0x42, 0x5A, 0x31, 0xD9, 0x51, 0xAE, 0x64, \
     0xFD, 0xB2, 0x3F, 0xCE, 0xC9, 0x50, 0x9D, 0x43, \
     0x68, 0x7F, 0xEB, 0x69, 0xED, 0xD1, 0xCC, 0x5E, \
     0x0B, 0x8C, 0xC3, 0xBD, 0xF6, 0x4B, 0x10, 0xEF, \
     0x86, 0xB6, 0x31, 0x42, 0xA3, 0xAB, 0x88, 0x29, \
     0x55, 0x5B, 0x2F, 0x74, 0x7C, 0x93, 0x26, 0x65, \
     0xCB, 0x2C, 0x0F, 0x1C, 0xC0, 0x1B, 0xD7, 0x02, \
     0x29, 0x38, 0x88, 0x39, 0xD2, 0xAF, 0x05, 0xE4, \
     0x54, 0x50, 0x4A, 0xC7, 0x8B, 0x75, 0x82, 0x82, \
     0x28, 0x46, 0xC0, 0xBA, 0x35, 0xC3, 0x5F, 0x5C, \
     0x59, 0x16, 0x0C, 0xC0, 0x46, 0xFD, 0x82, 0x51, \
     0x54, 0x1F, 0xC6, 0x8C, 0x9C, 0x86, 0xB0, 0x22, \
     0xBB, 0x70, 0x99, 0x87, 0x6A, 0x46, 0x0E, 0x74, \
     0x51, 0xA8, 0xA9, 0x31, 0x09, 0x70, 0x3F, 0xEE, \
     0x1C, 0x21, 0x7E, 0x6C, 0x38, 0x26, 0xE5, 0x2C, \
     0x51, 0xAA, 0x69, 0x1E, 0x0E, 0x42, 0x3C, 0xFC, \
     0x99, 0xE9, 0xE3, 0x16, 0x50, 0xC1, 0x21, 0x7B, \
     0x62, 0x48, 0x16, 0xCD, 0xAD, 0x9A, 0x95, 0xF9, \
     0xD5, 0xB8, 0x01, 0x94, 0x88, 0xD9, 0xC0, 0xA0, \
     0xA1, 0xFE, 0x30, 0x75, 0xA5, 0x77, 0xE2, 0x31, \
     0x83, 0xF8, 0x1D, 0x4A, 0x3F, 0x2F, 0xA4, 0x57, \
     0x1E, 0xFC, 0x8C, 0xE0, 0xBA, 0x8A, 0x4F, 0xE8, \
     0xB6, 0x85, 0x5D, 0xFE, 0x72, 0xB0, 0xA6, 0x6E, \
     0xDE, 0xD2, 0xFB, 0xAB, 0xFB, 0xE5, 0x8A, 0x30, \
     0xFA, 0xFA, 0xBE, 0x1C, 0x5D, 0x71, 0xA8, 0x7E, \
     0x2F, 0x74, 0x1E, 0xF8, 0xC1, 0xFE, 0x86, 0xFE, \
     0xA6, 0xBB, 0xFD, 0xE5, 0x30, 0x67, 0x7F, 0x0D, \
     0x97, 0xD1, 0x1D, 0x49, 0xF7, 0xA8, 0x44, 0x3D, \
     0x08, 0x22, 0xE5, 0x06, 0xA9, 0xF4, 0x61, 0x4E, \
     0x01, 0x1E, 0x2A, 0x94, 0x83, 0x8F, 0xF8, 0x8C, \
     0xD6, 0x8C, 0x8B, 0xB7, 0xC5, 0xC6, 0x42, 0x4C, \
     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }

#define MBEDTLS_DHM_RFC7919_FFDHE8192_G_BIN { 0x02 }

#endif /* dhm.h */


/********* Start of file include/mbedtls/error.h ************/

/**
 * \file error.h
 *
 * \brief Error to string translation
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_ERROR_H
#define MBEDTLS_ERROR_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
    !defined(inline) && !defined(__cplusplus)
#define inline __inline
#endif

/**
 * Error code layout.
 *
 * Currently we try to keep all error codes within the negative space of 16
 * bits signed integers to support all platforms (-0x0001 - -0x7FFF). In
 * addition we'd like to give two layers of information on the error if
 * possible.
 *
 * For that purpose the error codes are segmented in the following manner:
 *
 * 16 bit error code bit-segmentation
 *
 * 1 bit  - Unused (sign bit)
 * 3 bits - High level module ID
 * 5 bits - Module-dependent error code
 * 7 bits - Low level module errors
 *
 * For historical reasons, low-level error codes are divided in even and odd,
 * even codes were assigned first, and -1 is reserved for other errors.
 *
 * Low-level module errors (0x0002-0x007E, 0x0001-0x007F)
 *
 * Module   Nr  Codes assigned
 * ERROR     2  0x006E          0x0001
 * MPI       7  0x0002-0x0010
 * GCM       3  0x0012-0x0014   0x0013-0x0013
 * BLOWFISH  3  0x0016-0x0018   0x0017-0x0017
 * THREADING 3  0x001A-0x001E
 * AES       5  0x0020-0x0022   0x0021-0x0025
 * CAMELLIA  3  0x0024-0x0026   0x0027-0x0027
 * XTEA      2  0x0028-0x0028   0x0029-0x0029
 * BASE64    2  0x002A-0x002C
 * OID       1  0x002E-0x002E   0x000B-0x000B
 * PADLOCK   1  0x0030-0x0030
 * DES       2  0x0032-0x0032   0x0033-0x0033
 * CTR_DBRG  4  0x0034-0x003A
 * ENTROPY   3  0x003C-0x0040   0x003D-0x003F
 * NET      13  0x0042-0x0052   0x0043-0x0049
 * ARIA      4  0x0058-0x005E
 * ASN1      7  0x0060-0x006C
 * CMAC      1  0x007A-0x007A
 * PBKDF2    1  0x007C-0x007C
 * HMAC_DRBG 4                  0x0003-0x0009
 * CCM       3                  0x000D-0x0011
 * ARC4      1                  0x0019-0x0019
 * MD2       1                  0x002B-0x002B
 * MD4       1                  0x002D-0x002D
 * MD5       1                  0x002F-0x002F
 * RIPEMD160 1                  0x0031-0x0031
 * SHA1      1                  0x0035-0x0035 0x0073-0x0073
 * SHA256    1                  0x0037-0x0037 0x0074-0x0074
 * SHA512    1                  0x0039-0x0039 0x0075-0x0075
 * CHACHA20  3                  0x0051-0x0055
 * POLY1305  3                  0x0057-0x005B
 * CHACHAPOLY 2 0x0054-0x0056
 * PLATFORM  2  0x0070-0x0072
 *
 * High-level module nr (3 bits - 0x0...-0x7...)
 * Name      ID  Nr of Errors
 * PEM       1   9
 * PKCS#12   1   4 (Started from top)
 * X509      2   20
 * PKCS5     2   4 (Started from top)
 * DHM       3   11
 * PK        3   15 (Started from top)
 * RSA       4   11
 * ECP       4   10 (Started from top)
 * MD        5   5
 * HKDF      5   1 (Started from top)
 * SSL       5   2 (Started from 0x5F00)
 * CIPHER    6   8 (Started from 0x6080)
 * SSL       6   24 (Started from top, plus 0x6000)
 * SSL       7   32
 *
 * Module dependent error code (5 bits 0x.00.-0x.F8.)
 */

#ifdef __cplusplus
extern "C" {
#endif

/** Generic error */
#define MBEDTLS_ERR_ERROR_GENERIC_ERROR       -0x0001
/** This is a bug in the library */
#define MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED -0x006E

/**
 * \brief Combines a high-level and low-level error code together.
 *
 *        Wrapper macro for mbedtls_error_add(). See that function for
 *        more details.
 */
#define MBEDTLS_ERROR_ADD( high, low ) \
        mbedtls_error_add( high, low, __FILE__, __LINE__ )

#if defined(MBEDTLS_TEST_HOOKS)
/**
 * \brief Testing hook called before adding/combining two error codes together.
 *        Only used when invasive testing is enabled via MBEDTLS_TEST_HOOKS.
 */
extern void (*mbedtls_test_hook_error_add)( int, int, const char *, int );
#endif

/**
 * \brief Combines a high-level and low-level error code together.
 *
 *        This function can be called directly however it is usually
 *        called via the #MBEDTLS_ERROR_ADD macro.
 *
 *        While a value of zero is not a negative error code, it is still an
 *        error code (that denotes success) and can be combined with both a
 *        negative error code or another value of zero.
 *
 * \note  When invasive testing is enabled via #MBEDTLS_TEST_HOOKS, also try to
 *        call \link mbedtls_test_hook_error_add \endlink.
 *
 * \param high      high-level error code. See error.h for more details.
 * \param low       low-level error code. See error.h for more details.
 * \param file      file where this error code addition occurred.
 * \param line      line where this error code addition occurred.
 */
static inline int mbedtls_error_add( int high, int low,
                                     const char *file, int line )
{
#if defined(MBEDTLS_TEST_HOOKS)
    if( *mbedtls_test_hook_error_add != NULL )
        ( *mbedtls_test_hook_error_add )( high, low, file, line );
#endif
    (void)file;
    (void)line;

    return( high + low );
}

/**
 * \brief Translate a mbed TLS error code into a string representation,
 *        Result is truncated if necessary and always includes a terminating
 *        null byte.
 *
 * \param errnum    error code
 * \param buffer    buffer to place representation in
 * \param buflen    length of the buffer
 */
void mbedtls_strerror( int errnum, char *buffer, size_t buflen );

/**
 * \brief Translate the high-level part of an Mbed TLS error code into a string
 *        representation.
 *
 * This function returns a const pointer to an un-modifiable string. The caller
 * must not try to modify the string. It is intended to be used mostly for
 * logging purposes.
 *
 * \param error_code    error code
 *
 * \return The string representation of the error code, or \c NULL if the error
 *         code is unknown.
 */
const char * mbedtls_high_level_strerr( int error_code );

/**
 * \brief Translate the low-level part of an Mbed TLS error code into a string
 *        representation.
 *
 * This function returns a const pointer to an un-modifiable string. The caller
 * must not try to modify the string. It is intended to be used mostly for
 * logging purposes.
 *
 * \param error_code    error code
 *
 * \return The string representation of the error code, or \c NULL if the error
 *         code is unknown.
 */
const char * mbedtls_low_level_strerr( int error_code );

#ifdef __cplusplus
}
#endif

#endif /* error.h */


/********* Start of file include/mbedtls/md.h ************/

 /**
 * \file md.h
 *
 * \brief This file contains the generic message-digest wrapper.
 *
 * \author Adriaan de Jong <dejong@fox-it.com>
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_MD_H
#define MBEDTLS_MD_H

#include <stddef.h>

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif


/** The selected feature is not available. */
#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE                -0x5080
/** Bad input parameters to function. */
#define MBEDTLS_ERR_MD_BAD_INPUT_DATA                     -0x5100
/** Failed to allocate memory. */
#define MBEDTLS_ERR_MD_ALLOC_FAILED                       -0x5180
/** Opening or reading of file failed. */
#define MBEDTLS_ERR_MD_FILE_IO_ERROR                      -0x5200

/* MBEDTLS_ERR_MD_HW_ACCEL_FAILED is deprecated and should not be used. */
/** MD hardware accelerator failed. */
#define MBEDTLS_ERR_MD_HW_ACCEL_FAILED                    -0x5280

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief     Supported message digests.
 *
 * \warning   MD2, MD4, MD5 and SHA-1 are considered weak message digests and
 *            their use constitutes a security risk. We recommend considering
 *            stronger message digests instead.
 *
 */
typedef enum {
    MBEDTLS_MD_NONE=0,    /**< None. */
    MBEDTLS_MD_MD2,       /**< The MD2 message digest. */
    MBEDTLS_MD_MD4,       /**< The MD4 message digest. */
    MBEDTLS_MD_MD5,       /**< The MD5 message digest. */
    MBEDTLS_MD_SHA1,      /**< The SHA-1 message digest. */
    MBEDTLS_MD_SHA224,    /**< The SHA-224 message digest. */
    MBEDTLS_MD_SHA256,    /**< The SHA-256 message digest. */
    MBEDTLS_MD_SHA384,    /**< The SHA-384 message digest. */
    MBEDTLS_MD_SHA512,    /**< The SHA-512 message digest. */
    MBEDTLS_MD_RIPEMD160, /**< The RIPEMD-160 message digest. */
} mbedtls_md_type_t;

#if defined(MBEDTLS_SHA512_C)
#define MBEDTLS_MD_MAX_SIZE         64  /* longest known is SHA512 */
#else
#define MBEDTLS_MD_MAX_SIZE         32  /* longest known is SHA256 or less */
#endif

#if defined(MBEDTLS_SHA512_C)
#define MBEDTLS_MD_MAX_BLOCK_SIZE         128
#else
#define MBEDTLS_MD_MAX_BLOCK_SIZE         64
#endif

/**
 * Opaque struct defined in md_internal.h.
 */
typedef struct mbedtls_md_info_t mbedtls_md_info_t;

/**
 * The generic message-digest context.
 */
typedef struct mbedtls_md_context_t
{
    /** Information about the associated message digest. */
    const mbedtls_md_info_t *md_info;

    /** The digest-specific context. */
    void *md_ctx;

    /** The HMAC part of the context. */
    void *hmac_ctx;
} mbedtls_md_context_t;

/**
 * \brief           This function returns the list of digests supported by the
 *                  generic digest module.
 *
 * \note            The list starts with the strongest available hashes.
 *
 * \return          A statically allocated array of digests. Each element
 *                  in the returned list is an integer belonging to the
 *                  message-digest enumeration #mbedtls_md_type_t.
 *                  The last entry is 0.
 */
const int *mbedtls_md_list( void );

/**
 * \brief           This function returns the message-digest information
 *                  associated with the given digest name.
 *
 * \param md_name   The name of the digest to search for.
 *
 * \return          The message-digest information associated with \p md_name.
 * \return          NULL if the associated message-digest information is not found.
 */
const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name );

/**
 * \brief           This function returns the message-digest information
 *                  associated with the given digest type.
 *
 * \param md_type   The type of digest to search for.
 *
 * \return          The message-digest information associated with \p md_type.
 * \return          NULL if the associated message-digest information is not found.
 */
const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type );

/**
 * \brief           This function initializes a message-digest context without
 *                  binding it to a particular message-digest algorithm.
 *
 *                  This function should always be called first. It prepares the
 *                  context for mbedtls_md_setup() for binding it to a
 *                  message-digest algorithm.
 */
void mbedtls_md_init( mbedtls_md_context_t *ctx );

/**
 * \brief           This function clears the internal structure of \p ctx and
 *                  frees any embedded internal structure, but does not free
 *                  \p ctx itself.
 *
 *                  If you have called mbedtls_md_setup() on \p ctx, you must
 *                  call mbedtls_md_free() when you are no longer using the
 *                  context.
 *                  Calling this function if you have previously
 *                  called mbedtls_md_init() and nothing else is optional.
 *                  You must not call this function if you have not called
 *                  mbedtls_md_init().
 */
void mbedtls_md_free( mbedtls_md_context_t *ctx );

#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief           This function selects the message digest algorithm to use,
 *                  and allocates internal structures.
 *
 *                  It should be called after mbedtls_md_init() or mbedtls_md_free().
 *                  Makes it necessary to call mbedtls_md_free() later.
 *
 * \deprecated      Superseded by mbedtls_md_setup() in 2.0.0
 *
 * \param ctx       The context to set up.
 * \param md_info   The information structure of the message-digest algorithm
 *                  to use.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 * \return          #MBEDTLS_ERR_MD_ALLOC_FAILED on memory-allocation failure.
 */
int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info ) MBEDTLS_DEPRECATED;
#undef MBEDTLS_DEPRECATED
#endif /* MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief           This function selects the message digest algorithm to use,
 *                  and allocates internal structures.
 *
 *                  It should be called after mbedtls_md_init() or
 *                  mbedtls_md_free(). Makes it necessary to call
 *                  mbedtls_md_free() later.
 *
 * \param ctx       The context to set up.
 * \param md_info   The information structure of the message-digest algorithm
 *                  to use.
 * \param hmac      Defines if HMAC is used. 0: HMAC is not used (saves some memory),
 *                  or non-zero: HMAC is used with this context.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 * \return          #MBEDTLS_ERR_MD_ALLOC_FAILED on memory-allocation failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac );

/**
 * \brief           This function clones the state of an message-digest
 *                  context.
 *
 * \note            You must call mbedtls_md_setup() on \c dst before calling
 *                  this function.
 *
 * \note            The two contexts must have the same type,
 *                  for example, both are SHA-256.
 *
 * \warning         This function clones the message-digest state, not the
 *                  HMAC state.
 *
 * \param dst       The destination context.
 * \param src       The context to be cloned.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_clone( mbedtls_md_context_t *dst,
                      const mbedtls_md_context_t *src );

/**
 * \brief           This function extracts the message-digest size from the
 *                  message-digest information structure.
 *
 * \param md_info   The information structure of the message-digest algorithm
 *                  to use.
 *
 * \return          The size of the message-digest output in Bytes.
 */
unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info );

/**
 * \brief           This function extracts the message-digest type from the
 *                  message-digest information structure.
 *
 * \param md_info   The information structure of the message-digest algorithm
 *                  to use.
 *
 * \return          The type of the message digest.
 */
mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info );

/**
 * \brief           This function extracts the message-digest name from the
 *                  message-digest information structure.
 *
 * \param md_info   The information structure of the message-digest algorithm
 *                  to use.
 *
 * \return          The name of the message digest.
 */
const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info );

/**
 * \brief           This function starts a message-digest computation.
 *
 *                  You must call this function after setting up the context
 *                  with mbedtls_md_setup(), and before passing data with
 *                  mbedtls_md_update().
 *
 * \param ctx       The generic message-digest context.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_starts( mbedtls_md_context_t *ctx );

/**
 * \brief           This function feeds an input buffer into an ongoing
 *                  message-digest computation.
 *
 *                  You must call mbedtls_md_starts() before calling this
 *                  function. You may call this function multiple times.
 *                  Afterwards, call mbedtls_md_finish().
 *
 * \param ctx       The generic message-digest context.
 * \param input     The buffer holding the input data.
 * \param ilen      The length of the input data.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen );

/**
 * \brief           This function finishes the digest operation,
 *                  and writes the result to the output buffer.
 *
 *                  Call this function after a call to mbedtls_md_starts(),
 *                  followed by any number of calls to mbedtls_md_update().
 *                  Afterwards, you may either clear the context with
 *                  mbedtls_md_free(), or call mbedtls_md_starts() to reuse
 *                  the context for another digest operation with the same
 *                  algorithm.
 *
 * \param ctx       The generic message-digest context.
 * \param output    The buffer for the generic message-digest checksum result.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output );

/**
 * \brief          This function calculates the message-digest of a buffer,
 *                 with respect to a configurable message-digest algorithm
 *                 in a single call.
 *
 *                 The result is calculated as
 *                 Output = message_digest(input buffer).
 *
 * \param md_info  The information structure of the message-digest algorithm
 *                 to use.
 * \param input    The buffer holding the data.
 * \param ilen     The length of the input data.
 * \param output   The generic message-digest checksum result.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                 failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
        unsigned char *output );

#if defined(MBEDTLS_FS_IO)
/**
 * \brief          This function calculates the message-digest checksum
 *                 result of the contents of the provided file.
 *
 *                 The result is calculated as
 *                 Output = message_digest(file contents).
 *
 * \param md_info  The information structure of the message-digest algorithm
 *                 to use.
 * \param path     The input file name.
 * \param output   The generic message-digest checksum result.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_MD_FILE_IO_ERROR on an I/O error accessing
 *                 the file pointed by \p path.
 * \return         #MBEDTLS_ERR_MD_BAD_INPUT_DATA if \p md_info was NULL.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path,
                     unsigned char *output );
#endif /* MBEDTLS_FS_IO */

/**
 * \brief           This function sets the HMAC key and prepares to
 *                  authenticate a new message.
 *
 *                  Call this function after mbedtls_md_setup(), to use
 *                  the MD context for an HMAC calculation, then call
 *                  mbedtls_md_hmac_update() to provide the input data, and
 *                  mbedtls_md_hmac_finish() to get the HMAC value.
 *
 * \param ctx       The message digest context containing an embedded HMAC
 *                  context.
 * \param key       The HMAC secret key.
 * \param keylen    The length of the HMAC key in Bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
                    size_t keylen );

/**
 * \brief           This function feeds an input buffer into an ongoing HMAC
 *                  computation.
 *
 *                  Call mbedtls_md_hmac_starts() or mbedtls_md_hmac_reset()
 *                  before calling this function.
 *                  You may call this function multiple times to pass the
 *                  input piecewise.
 *                  Afterwards, call mbedtls_md_hmac_finish().
 *
 * \param ctx       The message digest context containing an embedded HMAC
 *                  context.
 * \param input     The buffer holding the input data.
 * \param ilen      The length of the input data.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input,
                    size_t ilen );

/**
 * \brief           This function finishes the HMAC operation, and writes
 *                  the result to the output buffer.
 *
 *                  Call this function after mbedtls_md_hmac_starts() and
 *                  mbedtls_md_hmac_update() to get the HMAC value. Afterwards
 *                  you may either call mbedtls_md_free() to clear the context,
 *                  or call mbedtls_md_hmac_reset() to reuse the context with
 *                  the same HMAC key.
 *
 * \param ctx       The message digest context containing an embedded HMAC
 *                  context.
 * \param output    The generic HMAC checksum result.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output);

/**
 * \brief           This function prepares to authenticate a new message with
 *                  the same key as the previous HMAC operation.
 *
 *                  You may call this function after mbedtls_md_hmac_finish().
 *                  Afterwards call mbedtls_md_hmac_update() to pass the new
 *                  input.
 *
 * \param ctx       The message digest context containing an embedded HMAC
 *                  context.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                  failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx );

/**
 * \brief          This function calculates the full generic HMAC
 *                 on the input buffer with the provided key.
 *
 *                 The function allocates the context, performs the
 *                 calculation, and frees the context.
 *
 *                 The HMAC result is calculated as
 *                 output = generic HMAC(hmac key, input buffer).
 *
 * \param md_info  The information structure of the message-digest algorithm
 *                 to use.
 * \param key      The HMAC secret key.
 * \param keylen   The length of the HMAC secret key in Bytes.
 * \param input    The buffer holding the input data.
 * \param ilen     The length of the input data.
 * \param output   The generic HMAC result.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification
 *                 failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen,
                const unsigned char *input, size_t ilen,
                unsigned char *output );

/* Internal use */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data );

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_MD_H */


/********* Start of file include/mbedtls/md_internal.h ************/

/**
 * \file md_internal.h
 *
 * \brief Message digest wrappers.
 *
 * \warning This in an internal header. Do not include directly.
 *
 * \author Adriaan de Jong <dejong@fox-it.com>
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_MD_WRAP_H
#define MBEDTLS_MD_WRAP_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#ifdef __cplusplus
extern "C" {
#endif

/**
 * Message digest information.
 * Allows message digest functions to be called in a generic way.
 */
struct mbedtls_md_info_t
{
    /** Name of the message digest */
    const char * name;

    /** Digest identifier */
    mbedtls_md_type_t type;

    /** Output length of the digest function in bytes */
    unsigned char size;

    /** Block length of the digest function in bytes */
    unsigned char block_size;
};

#if defined(MBEDTLS_MD2_C)
extern const mbedtls_md_info_t mbedtls_md2_info;
#endif
#if defined(MBEDTLS_MD4_C)
extern const mbedtls_md_info_t mbedtls_md4_info;
#endif
#if defined(MBEDTLS_MD5_C)
extern const mbedtls_md_info_t mbedtls_md5_info;
#endif
#if defined(MBEDTLS_RIPEMD160_C)
extern const mbedtls_md_info_t mbedtls_ripemd160_info;
#endif
#if defined(MBEDTLS_SHA1_C)
extern const mbedtls_md_info_t mbedtls_sha1_info;
#endif
#if defined(MBEDTLS_SHA256_C)
extern const mbedtls_md_info_t mbedtls_sha224_info;
extern const mbedtls_md_info_t mbedtls_sha256_info;
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
extern const mbedtls_md_info_t mbedtls_sha384_info;
#endif
extern const mbedtls_md_info_t mbedtls_sha512_info;
#endif

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_MD_WRAP_H */


/********* Start of file include/mbedtls/md5.h ************/

/**
 * \file md5.h
 *
 * \brief MD5 message digest algorithm (hash function)
 *
 * \warning   MD5 is considered a weak message digest and its use constitutes a
 *            security risk. We recommend considering stronger message
 *            digests instead.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_MD5_H
#define MBEDTLS_MD5_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

/* MBEDTLS_ERR_MD5_HW_ACCEL_FAILED is deprecated and should not be used. */
/** MD5 hardware accelerator failed */
#define MBEDTLS_ERR_MD5_HW_ACCEL_FAILED                   -0x002F

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_MD5_ALT)
// Regular implementation
//

/**
 * \brief          MD5 context structure
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
typedef struct mbedtls_md5_context
{
    uint32_t total[2];          /*!< number of bytes processed  */
    uint32_t state[4];          /*!< intermediate digest state  */
    unsigned char buffer[64];   /*!< data block being processed */
}
mbedtls_md5_context;

#else  /* MBEDTLS_MD5_ALT */

#endif /* MBEDTLS_MD5_ALT */

/**
 * \brief          Initialize MD5 context
 *
 * \param ctx      MD5 context to be initialized
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md5_init( mbedtls_md5_context *ctx );

/**
 * \brief          Clear MD5 context
 *
 * \param ctx      MD5 context to be cleared
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md5_free( mbedtls_md5_context *ctx );

/**
 * \brief          Clone (the state of) an MD5 context
 *
 * \param dst      The destination context
 * \param src      The context to be cloned
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md5_clone( mbedtls_md5_context *dst,
                        const mbedtls_md5_context *src );

/**
 * \brief          MD5 context setup
 *
 * \param ctx      context to be initialized
 *
 * \return         0 if successful
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md5_starts_ret( mbedtls_md5_context *ctx );

/**
 * \brief          MD5 process buffer
 *
 * \param ctx      MD5 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 *
 * \return         0 if successful
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md5_update_ret( mbedtls_md5_context *ctx,
                            const unsigned char *input,
                            size_t ilen );

/**
 * \brief          MD5 final digest
 *
 * \param ctx      MD5 context
 * \param output   MD5 checksum result
 *
 * \return         0 if successful
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md5_finish_ret( mbedtls_md5_context *ctx,
                            unsigned char output[16] );

/**
 * \brief          MD5 process data block (internal use only)
 *
 * \param ctx      MD5 context
 * \param data     buffer holding one block of data
 *
 * \return         0 if successful
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_internal_md5_process( mbedtls_md5_context *ctx,
                                  const unsigned char data[64] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          MD5 context setup
 *
 * \deprecated     Superseded by mbedtls_md5_starts_ret() in 2.7.0
 *
 * \param ctx      context to be initialized
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md5_starts( mbedtls_md5_context *ctx );

/**
 * \brief          MD5 process buffer
 *
 * \deprecated     Superseded by mbedtls_md5_update_ret() in 2.7.0
 *
 * \param ctx      MD5 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md5_update( mbedtls_md5_context *ctx,
                                            const unsigned char *input,
                                            size_t ilen );

/**
 * \brief          MD5 final digest
 *
 * \deprecated     Superseded by mbedtls_md5_finish_ret() in 2.7.0
 *
 * \param ctx      MD5 context
 * \param output   MD5 checksum result
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md5_finish( mbedtls_md5_context *ctx,
                                            unsigned char output[16] );

/**
 * \brief          MD5 process data block (internal use only)
 *
 * \deprecated     Superseded by mbedtls_internal_md5_process() in 2.7.0
 *
 * \param ctx      MD5 context
 * \param data     buffer holding one block of data
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md5_process( mbedtls_md5_context *ctx,
                                             const unsigned char data[64] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          Output = MD5( input buffer )
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   MD5 checksum result
 *
 * \return         0 if successful
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md5_ret( const unsigned char *input,
                     size_t ilen,
                     unsigned char output[16] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          Output = MD5( input buffer )
 *
 * \deprecated     Superseded by mbedtls_md5_ret() in 2.7.0
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   MD5 checksum result
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md5( const unsigned char *input,
                                     size_t ilen,
                                     unsigned char output[16] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 *
 * \warning        MD5 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md5_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_md5.h */


/********* Start of file include/mbedtls/md2.h ************/

/**
 * \file md2.h
 *
 * \brief MD2 message digest algorithm (hash function)
 *
 * \warning MD2 is considered a weak message digest and its use constitutes a
 *          security risk. We recommend considering stronger message digests
 *          instead.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
#ifndef MBEDTLS_MD2_H
#define MBEDTLS_MD2_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

/* MBEDTLS_ERR_MD2_HW_ACCEL_FAILED is deprecated and should not be used. */
/** MD2 hardware accelerator failed */
#define MBEDTLS_ERR_MD2_HW_ACCEL_FAILED                   -0x002B

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_MD2_ALT)
// Regular implementation
//

/**
 * \brief          MD2 context structure
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
typedef struct mbedtls_md2_context
{
    unsigned char cksum[16];    /*!< checksum of the data block */
    unsigned char state[48];    /*!< intermediate digest state  */
    unsigned char buffer[16];   /*!< data block being processed */
    size_t left;                /*!< amount of data in buffer   */
}
mbedtls_md2_context;

#else  /* MBEDTLS_MD2_ALT */

#endif /* MBEDTLS_MD2_ALT */

/**
 * \brief          Initialize MD2 context
 *
 * \param ctx      MD2 context to be initialized
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md2_init( mbedtls_md2_context *ctx );

/**
 * \brief          Clear MD2 context
 *
 * \param ctx      MD2 context to be cleared
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md2_free( mbedtls_md2_context *ctx );

/**
 * \brief          Clone (the state of) an MD2 context
 *
 * \param dst      The destination context
 * \param src      The context to be cloned
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md2_clone( mbedtls_md2_context *dst,
                        const mbedtls_md2_context *src );

/**
 * \brief          MD2 context setup
 *
 * \param ctx      context to be initialized
 *
 * \return         0 if successful
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx );

/**
 * \brief          MD2 process buffer
 *
 * \param ctx      MD2 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 *
 * \return         0 if successful
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md2_update_ret( mbedtls_md2_context *ctx,
                            const unsigned char *input,
                            size_t ilen );

/**
 * \brief          MD2 final digest
 *
 * \param ctx      MD2 context
 * \param output   MD2 checksum result
 *
 * \return         0 if successful
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx,
                            unsigned char output[16] );

/**
 * \brief          MD2 process data block (internal use only)
 *
 * \param ctx      MD2 context
 *
 * \return         0 if successful
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_internal_md2_process( mbedtls_md2_context *ctx );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          MD2 context setup
 *
 * \deprecated     Superseded by mbedtls_md2_starts_ret() in 2.7.0
 *
 * \param ctx      context to be initialized
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md2_starts( mbedtls_md2_context *ctx );

/**
 * \brief          MD2 process buffer
 *
 * \deprecated     Superseded by mbedtls_md2_update_ret() in 2.7.0
 *
 * \param ctx      MD2 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md2_update( mbedtls_md2_context *ctx,
                                            const unsigned char *input,
                                            size_t ilen );

/**
 * \brief          MD2 final digest
 *
 * \deprecated     Superseded by mbedtls_md2_finish_ret() in 2.7.0
 *
 * \param ctx      MD2 context
 * \param output   MD2 checksum result
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md2_finish( mbedtls_md2_context *ctx,
                                            unsigned char output[16] );

/**
 * \brief          MD2 process data block (internal use only)
 *
 * \deprecated     Superseded by mbedtls_internal_md2_process() in 2.7.0
 *
 * \param ctx      MD2 context
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md2_process( mbedtls_md2_context *ctx );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          Output = MD2( input buffer )
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   MD2 checksum result
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md2_ret( const unsigned char *input,
                     size_t ilen,
                     unsigned char output[16] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          Output = MD2( input buffer )
 *
 * \deprecated     Superseded by mbedtls_md2_ret() in 2.7.0
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   MD2 checksum result
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md2( const unsigned char *input,
                                     size_t ilen,
                                     unsigned char output[16] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 *
 * \warning        MD2 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md2_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_md2.h */


/********* Start of file include/mbedtls/md4.h ************/

/**
 * \file md4.h
 *
 * \brief MD4 message digest algorithm (hash function)
 *
 * \warning MD4 is considered a weak message digest and its use constitutes a
 *          security risk. We recommend considering stronger message digests
 *          instead.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
#ifndef MBEDTLS_MD4_H
#define MBEDTLS_MD4_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

/* MBEDTLS_ERR_MD4_HW_ACCEL_FAILED is deprecated and should not be used. */
/** MD4 hardware accelerator failed */
#define MBEDTLS_ERR_MD4_HW_ACCEL_FAILED                   -0x002D

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_MD4_ALT)
// Regular implementation
//

/**
 * \brief          MD4 context structure
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
typedef struct mbedtls_md4_context
{
    uint32_t total[2];          /*!< number of bytes processed  */
    uint32_t state[4];          /*!< intermediate digest state  */
    unsigned char buffer[64];   /*!< data block being processed */
}
mbedtls_md4_context;

#else  /* MBEDTLS_MD4_ALT */

#endif /* MBEDTLS_MD4_ALT */

/**
 * \brief          Initialize MD4 context
 *
 * \param ctx      MD4 context to be initialized
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md4_init( mbedtls_md4_context *ctx );

/**
 * \brief          Clear MD4 context
 *
 * \param ctx      MD4 context to be cleared
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md4_free( mbedtls_md4_context *ctx );

/**
 * \brief          Clone (the state of) an MD4 context
 *
 * \param dst      The destination context
 * \param src      The context to be cloned
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
void mbedtls_md4_clone( mbedtls_md4_context *dst,
                        const mbedtls_md4_context *src );

/**
 * \brief          MD4 context setup
 *
 * \param ctx      context to be initialized
 *
 * \return         0 if successful
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 */
int mbedtls_md4_starts_ret( mbedtls_md4_context *ctx );

/**
 * \brief          MD4 process buffer
 *
 * \param ctx      MD4 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 *
 * \return         0 if successful
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md4_update_ret( mbedtls_md4_context *ctx,
                            const unsigned char *input,
                            size_t ilen );

/**
 * \brief          MD4 final digest
 *
 * \param ctx      MD4 context
 * \param output   MD4 checksum result
 *
 * \return         0 if successful
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md4_finish_ret( mbedtls_md4_context *ctx,
                            unsigned char output[16] );

/**
 * \brief          MD4 process data block (internal use only)
 *
 * \param ctx      MD4 context
 * \param data     buffer holding one block of data
 *
 * \return         0 if successful
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_internal_md4_process( mbedtls_md4_context *ctx,
                                  const unsigned char data[64] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          MD4 context setup
 *
 * \deprecated     Superseded by mbedtls_md4_starts_ret() in 2.7.0
 *
 * \param ctx      context to be initialized
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md4_starts( mbedtls_md4_context *ctx );

/**
 * \brief          MD4 process buffer
 *
 * \deprecated     Superseded by mbedtls_md4_update_ret() in 2.7.0
 *
 * \param ctx      MD4 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md4_update( mbedtls_md4_context *ctx,
                                            const unsigned char *input,
                                            size_t ilen );

/**
 * \brief          MD4 final digest
 *
 * \deprecated     Superseded by mbedtls_md4_finish_ret() in 2.7.0
 *
 * \param ctx      MD4 context
 * \param output   MD4 checksum result
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md4_finish( mbedtls_md4_context *ctx,
                                            unsigned char output[16] );

/**
 * \brief          MD4 process data block (internal use only)
 *
 * \deprecated     Superseded by mbedtls_internal_md4_process() in 2.7.0
 *
 * \param ctx      MD4 context
 * \param data     buffer holding one block of data
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md4_process( mbedtls_md4_context *ctx,
                                             const unsigned char data[64] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          Output = MD4( input buffer )
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   MD4 checksum result
 *
 * \return         0 if successful
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md4_ret( const unsigned char *input,
                     size_t ilen,
                     unsigned char output[16] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          Output = MD4( input buffer )
 *
 * \deprecated     Superseded by mbedtls_md4_ret() in 2.7.0
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   MD4 checksum result
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_md4( const unsigned char *input,
                                     size_t ilen,
                                     unsigned char output[16] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 *
 * \warning        MD4 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
int mbedtls_md4_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_md4.h */


/********* Start of file include/mbedtls/rsa.h ************/

/**
 * \file rsa.h
 *
 * \brief This file provides an API for the RSA public-key cryptosystem.
 *
 * The RSA public-key cryptosystem is defined in <em>Public-Key
 * Cryptography Standards (PKCS) #1 v1.5: RSA Encryption</em>
 * and <em>Public-Key Cryptography Standards (PKCS) #1 v2.1:
 * RSA Cryptography Specifications</em>.
 *
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_RSA_H
#define MBEDTLS_RSA_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif




#if defined(MBEDTLS_THREADING_C)

#endif

/*
 * RSA Error codes
 */
/** Bad input parameters to function. */
#define MBEDTLS_ERR_RSA_BAD_INPUT_DATA                    -0x4080
/** Input data contains invalid padding and is rejected. */
#define MBEDTLS_ERR_RSA_INVALID_PADDING                   -0x4100
/** Something failed during generation of a key. */
#define MBEDTLS_ERR_RSA_KEY_GEN_FAILED                    -0x4180
/** Key failed to pass the validity check of the library. */
#define MBEDTLS_ERR_RSA_KEY_CHECK_FAILED                  -0x4200
/** The public key operation failed. */
#define MBEDTLS_ERR_RSA_PUBLIC_FAILED                     -0x4280
/** The private key operation failed. */
#define MBEDTLS_ERR_RSA_PRIVATE_FAILED                    -0x4300
/** The PKCS#1 verification failed. */
#define MBEDTLS_ERR_RSA_VERIFY_FAILED                     -0x4380
/** The output buffer for decryption is not large enough. */
#define MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE                  -0x4400
/** The random generator failed to generate non-zeros. */
#define MBEDTLS_ERR_RSA_RNG_FAILED                        -0x4480

/* MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION is deprecated and should not be used.
 */
/** The implementation does not offer the requested operation, for example, because of security violations or lack of functionality. */
#define MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION             -0x4500

/* MBEDTLS_ERR_RSA_HW_ACCEL_FAILED is deprecated and should not be used. */
/** RSA hardware accelerator failed. */
#define MBEDTLS_ERR_RSA_HW_ACCEL_FAILED                   -0x4580

/*
 * RSA constants
 */
#define MBEDTLS_RSA_PUBLIC      0 /**< Request private key operation. */
#define MBEDTLS_RSA_PRIVATE     1 /**< Request public key operation. */

#define MBEDTLS_RSA_PKCS_V15    0 /**< Use PKCS#1 v1.5 encoding. */
#define MBEDTLS_RSA_PKCS_V21    1 /**< Use PKCS#1 v2.1 encoding. */

#define MBEDTLS_RSA_SIGN        1 /**< Identifier for RSA signature operations. */
#define MBEDTLS_RSA_CRYPT       2 /**< Identifier for RSA encryption and decryption operations. */

#define MBEDTLS_RSA_SALT_LEN_ANY    -1

/*
 * The above constants may be used even if the RSA module is compile out,
 * eg for alternative (PKCS#11) RSA implemenations in the PK layers.
 */

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_RSA_ALT)
// Regular implementation
//

/**
 * \brief   The RSA context structure.
 *
 * \note    Direct manipulation of the members of this structure
 *          is deprecated. All manipulation should instead be done through
 *          the public interface functions.
 */
typedef struct mbedtls_rsa_context
{
    int ver;                    /*!<  Reserved for internal purposes.
                                 *    Do not set this field in application
                                 *    code. Its meaning might change without
                                 *    notice. */
    size_t len;                 /*!<  The size of \p N in Bytes. */

    mbedtls_mpi N;              /*!<  The public modulus. */
    mbedtls_mpi E;              /*!<  The public exponent. */

    mbedtls_mpi D;              /*!<  The private exponent. */
    mbedtls_mpi P;              /*!<  The first prime factor. */
    mbedtls_mpi Q;              /*!<  The second prime factor. */

    mbedtls_mpi DP;             /*!<  <code>D % (P - 1)</code>. */
    mbedtls_mpi DQ;             /*!<  <code>D % (Q - 1)</code>. */
    mbedtls_mpi QP;             /*!<  <code>1 / (Q % P)</code>. */

    mbedtls_mpi RN;             /*!<  cached <code>R^2 mod N</code>. */

    mbedtls_mpi RP;             /*!<  cached <code>R^2 mod P</code>. */
    mbedtls_mpi RQ;             /*!<  cached <code>R^2 mod Q</code>. */

    mbedtls_mpi Vi;             /*!<  The cached blinding value. */
    mbedtls_mpi Vf;             /*!<  The cached un-blinding value. */

    int padding;                /*!< Selects padding mode:
                                     #MBEDTLS_RSA_PKCS_V15 for 1.5 padding and
                                     #MBEDTLS_RSA_PKCS_V21 for OAEP or PSS. */
    int hash_id;                /*!< Hash identifier of mbedtls_md_type_t type,
                                     as specified in md.h for use in the MGF
                                     mask generating function used in the
                                     EME-OAEP and EMSA-PSS encodings. */
#if defined(MBEDTLS_THREADING_C)
    /* Invariant: the mutex is initialized iff ver != 0. */
    mbedtls_threading_mutex_t mutex;    /*!<  Thread-safety mutex. */
#endif
}
mbedtls_rsa_context;

#else  /* MBEDTLS_RSA_ALT */

#endif /* MBEDTLS_RSA_ALT */

/**
 * \brief          This function initializes an RSA context.
 *
 * \note           Set padding to #MBEDTLS_RSA_PKCS_V21 for the RSAES-OAEP
 *                 encryption scheme and the RSASSA-PSS signature scheme.
 *
 * \note           The \p hash_id parameter is ignored when using
 *                 #MBEDTLS_RSA_PKCS_V15 padding.
 *
 * \note           The choice of padding mode is strictly enforced for private key
 *                 operations, since there might be security concerns in
 *                 mixing padding modes. For public key operations it is
 *                 a default value, which can be overridden by calling specific
 *                 \c rsa_rsaes_xxx or \c rsa_rsassa_xxx functions.
 *
 * \note           The hash selected in \p hash_id is always used for OEAP
 *                 encryption. For PSS signatures, it is always used for
 *                 making signatures, but can be overridden for verifying them.
 *                 If set to #MBEDTLS_MD_NONE, it is always overridden.
 *
 * \param ctx      The RSA context to initialize. This must not be \c NULL.
 * \param padding  The padding mode to use. This must be either
 *                 #MBEDTLS_RSA_PKCS_V15 or #MBEDTLS_RSA_PKCS_V21.
 * \param hash_id  The hash identifier of ::mbedtls_md_type_t type, if
 *                 \p padding is #MBEDTLS_RSA_PKCS_V21. It is unused
 *                 otherwise.
 */
void mbedtls_rsa_init( mbedtls_rsa_context *ctx,
                       int padding,
                       int hash_id );

/**
 * \brief          This function imports a set of core parameters into an
 *                 RSA context.
 *
 * \note           This function can be called multiple times for successive
 *                 imports, if the parameters are not simultaneously present.
 *
 *                 Any sequence of calls to this function should be followed
 *                 by a call to mbedtls_rsa_complete(), which checks and
 *                 completes the provided information to a ready-for-use
 *                 public or private RSA key.
 *
 * \note           See mbedtls_rsa_complete() for more information on which
 *                 parameters are necessary to set up a private or public
 *                 RSA key.
 *
 * \note           The imported parameters are copied and need not be preserved
 *                 for the lifetime of the RSA context being set up.
 *
 * \param ctx      The initialized RSA context to store the parameters in.
 * \param N        The RSA modulus. This may be \c NULL.
 * \param P        The first prime factor of \p N. This may be \c NULL.
 * \param Q        The second prime factor of \p N. This may be \c NULL.
 * \param D        The private exponent. This may be \c NULL.
 * \param E        The public exponent. This may be \c NULL.
 *
 * \return         \c 0 on success.
 * \return         A non-zero error code on failure.
 */
int mbedtls_rsa_import( mbedtls_rsa_context *ctx,
                        const mbedtls_mpi *N,
                        const mbedtls_mpi *P, const mbedtls_mpi *Q,
                        const mbedtls_mpi *D, const mbedtls_mpi *E );

/**
 * \brief          This function imports core RSA parameters, in raw big-endian
 *                 binary format, into an RSA context.
 *
 * \note           This function can be called multiple times for successive
 *                 imports, if the parameters are not simultaneously present.
 *
 *                 Any sequence of calls to this function should be followed
 *                 by a call to mbedtls_rsa_complete(), which checks and
 *                 completes the provided information to a ready-for-use
 *                 public or private RSA key.
 *
 * \note           See mbedtls_rsa_complete() for more information on which
 *                 parameters are necessary to set up a private or public
 *                 RSA key.
 *
 * \note           The imported parameters are copied and need not be preserved
 *                 for the lifetime of the RSA context being set up.
 *
 * \param ctx      The initialized RSA context to store the parameters in.
 * \param N        The RSA modulus. This may be \c NULL.
 * \param N_len    The Byte length of \p N; it is ignored if \p N == NULL.
 * \param P        The first prime factor of \p N. This may be \c NULL.
 * \param P_len    The Byte length of \p P; it ns ignored if \p P == NULL.
 * \param Q        The second prime factor of \p N. This may be \c NULL.
 * \param Q_len    The Byte length of \p Q; it is ignored if \p Q == NULL.
 * \param D        The private exponent. This may be \c NULL.
 * \param D_len    The Byte length of \p D; it is ignored if \p D == NULL.
 * \param E        The public exponent. This may be \c NULL.
 * \param E_len    The Byte length of \p E; it is ignored if \p E == NULL.
 *
 * \return         \c 0 on success.
 * \return         A non-zero error code on failure.
 */
int mbedtls_rsa_import_raw( mbedtls_rsa_context *ctx,
                            unsigned char const *N, size_t N_len,
                            unsigned char const *P, size_t P_len,
                            unsigned char const *Q, size_t Q_len,
                            unsigned char const *D, size_t D_len,
                            unsigned char const *E, size_t E_len );

/**
 * \brief          This function completes an RSA context from
 *                 a set of imported core parameters.
 *
 *                 To setup an RSA public key, precisely \p N and \p E
 *                 must have been imported.
 *
 *                 To setup an RSA private key, sufficient information must
 *                 be present for the other parameters to be derivable.
 *
 *                 The default implementation supports the following:
 *                 <ul><li>Derive \p P, \p Q from \p N, \p D, \p E.</li>
 *                 <li>Derive \p N, \p D from \p P, \p Q, \p E.</li></ul>
 *                 Alternative implementations need not support these.
 *
 *                 If this function runs successfully, it guarantees that
 *                 the RSA context can be used for RSA operations without
 *                 the risk of failure or crash.
 *
 * \warning        This function need not perform consistency checks
 *                 for the imported parameters. In particular, parameters that
 *                 are not needed by the implementation might be silently
 *                 discarded and left unchecked. To check the consistency
 *                 of the key material, see mbedtls_rsa_check_privkey().
 *
 * \param ctx      The initialized RSA context holding imported parameters.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_RSA_BAD_INPUT_DATA if the attempted derivations
 *                 failed.
 *
 */
int mbedtls_rsa_complete( mbedtls_rsa_context *ctx );

/**
 * \brief          This function exports the core parameters of an RSA key.
 *
 *                 If this function runs successfully, the non-NULL buffers
 *                 pointed to by \p N, \p P, \p Q, \p D, and \p E are fully
 *                 written, with additional unused space filled leading by
 *                 zero Bytes.
 *
 *                 Possible reasons for returning
 *                 #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED:<ul>
 *                 <li>An alternative RSA implementation is in use, which
 *                 stores the key externally, and either cannot or should
 *                 not export it into RAM.</li>
 *                 <li>A SW or HW implementation might not support a certain
 *                 deduction. For example, \p P, \p Q from \p N, \p D,
 *                 and \p E if the former are not part of the
 *                 implementation.</li></ul>
 *
 *                 If the function fails due to an unsupported operation,
 *                 the RSA context stays intact and remains usable.
 *
 * \param ctx      The initialized RSA context.
 * \param N        The MPI to hold the RSA modulus.
 *                 This may be \c NULL if this field need not be exported.
 * \param P        The MPI to hold the first prime factor of \p N.
 *                 This may be \c NULL if this field need not be exported.
 * \param Q        The MPI to hold the second prime factor of \p N.
 *                 This may be \c NULL if this field need not be exported.
 * \param D        The MPI to hold the private exponent.
 *                 This may be \c NULL if this field need not be exported.
 * \param E        The MPI to hold the public exponent.
 *                 This may be \c NULL if this field need not be exported.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED if exporting the
 *                 requested parameters cannot be done due to missing
 *                 functionality or because of security policies.
 * \return         A non-zero return code on any other failure.
 *
 */
int mbedtls_rsa_export( const mbedtls_rsa_context *ctx,
                        mbedtls_mpi *N, mbedtls_mpi *P, mbedtls_mpi *Q,
                        mbedtls_mpi *D, mbedtls_mpi *E );

/**
 * \brief          This function exports core parameters of an RSA key
 *                 in raw big-endian binary format.
 *
 *                 If this function runs successfully, the non-NULL buffers
 *                 pointed to by \p N, \p P, \p Q, \p D, and \p E are fully
 *                 written, with additional unused space filled leading by
 *                 zero Bytes.
 *
 *                 Possible reasons for returning
 *                 #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED:<ul>
 *                 <li>An alternative RSA implementation is in use, which
 *                 stores the key externally, and either cannot or should
 *                 not export it into RAM.</li>
 *                 <li>A SW or HW implementation might not support a certain
 *                 deduction. For example, \p P, \p Q from \p N, \p D,
 *                 and \p E if the former are not part of the
 *                 implementation.</li></ul>
 *                 If the function fails due to an unsupported operation,
 *                 the RSA context stays intact and remains usable.
 *
 * \note           The length parameters are ignored if the corresponding
 *                 buffer pointers are NULL.
 *
 * \param ctx      The initialized RSA context.
 * \param N        The Byte array to store the RSA modulus,
 *                 or \c NULL if this field need not be exported.
 * \param N_len    The size of the buffer for the modulus.
 * \param P        The Byte array to hold the first prime factor of \p N,
 *                 or \c NULL if this field need not be exported.
 * \param P_len    The size of the buffer for the first prime factor.
 * \param Q        The Byte array to hold the second prime factor of \p N,
 *                 or \c NULL if this field need not be exported.
 * \param Q_len    The size of the buffer for the second prime factor.
 * \param D        The Byte array to hold the private exponent,
 *                 or \c NULL if this field need not be exported.
 * \param D_len    The size of the buffer for the private exponent.
 * \param E        The Byte array to hold the public exponent,
 *                 or \c NULL if this field need not be exported.
 * \param E_len    The size of the buffer for the public exponent.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED if exporting the
 *                 requested parameters cannot be done due to missing
 *                 functionality or because of security policies.
 * \return         A non-zero return code on any other failure.
 */
int mbedtls_rsa_export_raw( const mbedtls_rsa_context *ctx,
                            unsigned char *N, size_t N_len,
                            unsigned char *P, size_t P_len,
                            unsigned char *Q, size_t Q_len,
                            unsigned char *D, size_t D_len,
                            unsigned char *E, size_t E_len );

/**
 * \brief          This function exports CRT parameters of a private RSA key.
 *
 * \note           Alternative RSA implementations not using CRT-parameters
 *                 internally can implement this function based on
 *                 mbedtls_rsa_deduce_opt().
 *
 * \param ctx      The initialized RSA context.
 * \param DP       The MPI to hold \c D modulo `P-1`,
 *                 or \c NULL if it need not be exported.
 * \param DQ       The MPI to hold \c D modulo `Q-1`,
 *                 or \c NULL if it need not be exported.
 * \param QP       The MPI to hold modular inverse of \c Q modulo \c P,
 *                 or \c NULL if it need not be exported.
 *
 * \return         \c 0 on success.
 * \return         A non-zero error code on failure.
 *
 */
int mbedtls_rsa_export_crt( const mbedtls_rsa_context *ctx,
                            mbedtls_mpi *DP, mbedtls_mpi *DQ, mbedtls_mpi *QP );

/**
 * \brief          This function sets padding for an already initialized RSA
 *                 context. See mbedtls_rsa_init() for details.
 *
 * \param ctx      The initialized RSA context to be configured.
 * \param padding  The padding mode to use. This must be either
 *                 #MBEDTLS_RSA_PKCS_V15 or #MBEDTLS_RSA_PKCS_V21.
 * \param hash_id  The #MBEDTLS_RSA_PKCS_V21 hash identifier.
 */
void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding,
                              int hash_id );

/**
 * \brief          This function retrieves the length of RSA modulus in Bytes.
 *
 * \param ctx      The initialized RSA context.
 *
 * \return         The length of the RSA modulus in Bytes.
 *
 */
size_t mbedtls_rsa_get_len( const mbedtls_rsa_context *ctx );

/**
 * \brief          This function generates an RSA keypair.
 *
 * \note           mbedtls_rsa_init() must be called before this function,
 *                 to set up the RSA context.
 *
 * \param ctx      The initialized RSA context used to hold the key.
 * \param f_rng    The RNG function to be used for key generation.
 *                 This must not be \c NULL.
 * \param p_rng    The RNG context to be passed to \p f_rng.
 *                 This may be \c NULL if \p f_rng doesn't need a context.
 * \param nbits    The size of the public key in bits.
 * \param exponent The public exponent to use. For example, \c 65537.
 *                 This must be odd and greater than \c 1.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_gen_key( mbedtls_rsa_context *ctx,
                         int (*f_rng)(void *, unsigned char *, size_t),
                         void *p_rng,
                         unsigned int nbits, int exponent );

/**
 * \brief          This function checks if a context contains at least an RSA
 *                 public key.
 *
 *                 If the function runs successfully, it is guaranteed that
 *                 enough information is present to perform an RSA public key
 *                 operation using mbedtls_rsa_public().
 *
 * \param ctx      The initialized RSA context to check.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 *
 */
int mbedtls_rsa_check_pubkey( const mbedtls_rsa_context *ctx );

/**
 * \brief      This function checks if a context contains an RSA private key
 *             and perform basic consistency checks.
 *
 * \note       The consistency checks performed by this function not only
 *             ensure that mbedtls_rsa_private() can be called successfully
 *             on the given context, but that the various parameters are
 *             mutually consistent with high probability, in the sense that
 *             mbedtls_rsa_public() and mbedtls_rsa_private() are inverses.
 *
 * \warning    This function should catch accidental misconfigurations
 *             like swapping of parameters, but it cannot establish full
 *             trust in neither the quality nor the consistency of the key
 *             material that was used to setup the given RSA context:
 *             <ul><li>Consistency: Imported parameters that are irrelevant
 *             for the implementation might be silently dropped. If dropped,
 *             the current function does not have access to them,
 *             and therefore cannot check them. See mbedtls_rsa_complete().
 *             If you want to check the consistency of the entire
 *             content of an PKCS1-encoded RSA private key, for example, you
 *             should use mbedtls_rsa_validate_params() before setting
 *             up the RSA context.
 *             Additionally, if the implementation performs empirical checks,
 *             these checks substantiate but do not guarantee consistency.</li>
 *             <li>Quality: This function is not expected to perform
 *             extended quality assessments like checking that the prime
 *             factors are safe. Additionally, it is the responsibility of the
 *             user to ensure the trustworthiness of the source of his RSA
 *             parameters, which goes beyond what is effectively checkable
 *             by the library.</li></ul>
 *
 * \param ctx  The initialized RSA context to check.
 *
 * \return     \c 0 on success.
 * \return     An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx );

/**
 * \brief          This function checks a public-private RSA key pair.
 *
 *                 It checks each of the contexts, and makes sure they match.
 *
 * \param pub      The initialized RSA context holding the public key.
 * \param prv      The initialized RSA context holding the private key.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context *pub,
                                const mbedtls_rsa_context *prv );

/**
 * \brief          This function performs an RSA public key operation.
 *
 * \param ctx      The initialized RSA context to use.
 * \param input    The input buffer. This must be a readable buffer
 *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 * \param output   The output buffer. This must be a writable buffer
 *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 *
 * \note           This function does not handle message padding.
 *
 * \note           Make sure to set \p input[0] = 0 or ensure that
 *                 input is smaller than \p N.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_public( mbedtls_rsa_context *ctx,
                const unsigned char *input,
                unsigned char *output );

/**
 * \brief          This function performs an RSA private key operation.
 *
 * \note           Blinding is used if and only if a PRNG is provided.
 *
 * \note           If blinding is used, both the base of exponentation
 *                 and the exponent are blinded, providing protection
 *                 against some side-channel attacks.
 *
 * \warning        It is deprecated and a security risk to not provide
 *                 a PRNG here and thereby prevent the use of blinding.
 *                 Future versions of the library may enforce the presence
 *                 of a PRNG.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG function, used for blinding. It is discouraged
 *                 and deprecated to pass \c NULL here, in which case
 *                 blinding will be omitted.
 * \param p_rng    The RNG context to pass to \p f_rng. This may be \c NULL
 *                 if \p f_rng is \c NULL or if \p f_rng doesn't need a context.
 * \param input    The input buffer. This must be a readable buffer
 *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 * \param output   The output buffer. This must be a writable buffer
 *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 *
 */
int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
                 int (*f_rng)(void *, unsigned char *, size_t),
                 void *p_rng,
                 const unsigned char *input,
                 unsigned char *output );

/**
 * \brief          This function adds the message padding, then performs an RSA
 *                 operation.
 *
 *                 It is the generic wrapper for performing a PKCS#1 encryption
 *                 operation using the \p mode from the context.
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 implicitly set to #MBEDTLS_RSA_PUBLIC.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PRIVATE and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG to use. It is mandatory for PKCS#1 v2.1 padding
 *                 encoding, and for PKCS#1 v1.5 padding encoding when used
 *                 with \p mode set to #MBEDTLS_RSA_PUBLIC. For PKCS#1 v1.5
 *                 padding encoding and \p mode set to #MBEDTLS_RSA_PRIVATE,
 *                 it is used for blinding and should be provided in this
 *                 case; see mbedtls_rsa_private() for more.
 * \param p_rng    The RNG context to be passed to \p f_rng. May be
 *                 \c NULL if \p f_rng is \c NULL or if \p f_rng doesn't
 *                 need a context argument.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated).
 * \param ilen     The length of the plaintext in Bytes.
 * \param input    The input data to encrypt. This must be a readable
 *                 buffer of size \p ilen Bytes. It may be \c NULL if
 *                 `ilen == 0`.
 * \param output   The output buffer. This must be a writable buffer
 *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_pkcs1_encrypt( mbedtls_rsa_context *ctx,
                       int (*f_rng)(void *, unsigned char *, size_t),
                       void *p_rng,
                       int mode, size_t ilen,
                       const unsigned char *input,
                       unsigned char *output );

/**
 * \brief          This function performs a PKCS#1 v1.5 encryption operation
 *                 (RSAES-PKCS1-v1_5-ENCRYPT).
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 implicitly set to #MBEDTLS_RSA_PUBLIC.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PRIVATE and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG function to use. It is needed for padding generation
 *                 if \p mode is #MBEDTLS_RSA_PUBLIC. If \p mode is
 *                 #MBEDTLS_RSA_PRIVATE (discouraged), it is used for
 *                 blinding and should be provided; see mbedtls_rsa_private().
 * \param p_rng    The RNG context to be passed to \p f_rng. This may
 *                 be \c NULL if \p f_rng is \c NULL or if \p f_rng
 *                 doesn't need a context argument.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated).
 * \param ilen     The length of the plaintext in Bytes.
 * \param input    The input data to encrypt. This must be a readable
 *                 buffer of size \p ilen Bytes. It may be \c NULL if
 *                 `ilen == 0`.
 * \param output   The output buffer. This must be a writable buffer
 *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsaes_pkcs1_v15_encrypt( mbedtls_rsa_context *ctx,
                                 int (*f_rng)(void *, unsigned char *, size_t),
                                 void *p_rng,
                                 int mode, size_t ilen,
                                 const unsigned char *input,
                                 unsigned char *output );

/**
 * \brief            This function performs a PKCS#1 v2.1 OAEP encryption
 *                   operation (RSAES-OAEP-ENCRYPT).
 *
 * \note             The output buffer must be as large as the size
 *                   of ctx->N. For example, 128 Bytes if RSA-1024 is used.
 *
 * \deprecated       It is deprecated and discouraged to call this function
 *                   in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library
 *                   are likely to remove the \p mode argument and have it
 *                   implicitly set to #MBEDTLS_RSA_PUBLIC.
 *
 * \note             Alternative implementations of RSA need not support
 *                   mode being set to #MBEDTLS_RSA_PRIVATE and might instead
 *                   return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx        The initnialized RSA context to use.
 * \param f_rng      The RNG function to use. This is needed for padding
 *                   generation and must be provided.
 * \param p_rng      The RNG context to be passed to \p f_rng. This may
 *                   be \c NULL if \p f_rng doesn't need a context argument.
 * \param mode       The mode of operation. This must be either
 *                   #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated).
 * \param label      The buffer holding the custom label to use.
 *                   This must be a readable buffer of length \p label_len
 *                   Bytes. It may be \c NULL if \p label_len is \c 0.
 * \param label_len  The length of the label in Bytes.
 * \param ilen       The length of the plaintext buffer \p input in Bytes.
 * \param input      The input data to encrypt. This must be a readable
 *                   buffer of size \p ilen Bytes. It may be \c NULL if
 *                   `ilen == 0`.
 * \param output     The output buffer. This must be a writable buffer
 *                   of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                   for an 2048-bit RSA modulus.
 *
 * \return           \c 0 on success.
 * \return           An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx,
                            int (*f_rng)(void *, unsigned char *, size_t),
                            void *p_rng,
                            int mode,
                            const unsigned char *label, size_t label_len,
                            size_t ilen,
                            const unsigned char *input,
                            unsigned char *output );

/**
 * \brief          This function performs an RSA operation, then removes the
 *                 message padding.
 *
 *                 It is the generic wrapper for performing a PKCS#1 decryption
 *                 operation using the \p mode from the context.
 *
 * \note           The output buffer length \c output_max_len should be
 *                 as large as the size \p ctx->len of \p ctx->N (for example,
 *                 128 Bytes if RSA-1024 is used) to be able to hold an
 *                 arbitrary decrypted message. If it is not large enough to
 *                 hold the decryption of the particular ciphertext provided,
 *                 the function returns \c MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 implicitly set to #MBEDTLS_RSA_PRIVATE.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PUBLIC and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE,
 *                 this is used for blinding and should be provided; see
 *                 mbedtls_rsa_private() for more. If \p mode is
 *                 #MBEDTLS_RSA_PUBLIC, it is ignored.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng is \c NULL or doesn't need a context.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated).
 * \param olen     The address at which to store the length of
 *                 the plaintext. This must not be \c NULL.
 * \param input    The ciphertext buffer. This must be a readable buffer
 *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 * \param output   The buffer used to hold the plaintext. This must
 *                 be a writable buffer of length \p output_max_len Bytes.
 * \param output_max_len The length in Bytes of the output buffer \p output.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_pkcs1_decrypt( mbedtls_rsa_context *ctx,
                       int (*f_rng)(void *, unsigned char *, size_t),
                       void *p_rng,
                       int mode, size_t *olen,
                       const unsigned char *input,
                       unsigned char *output,
                       size_t output_max_len );

/**
 * \brief          This function performs a PKCS#1 v1.5 decryption
 *                 operation (RSAES-PKCS1-v1_5-DECRYPT).
 *
 * \note           The output buffer length \c output_max_len should be
 *                 as large as the size \p ctx->len of \p ctx->N, for example,
 *                 128 Bytes if RSA-1024 is used, to be able to hold an
 *                 arbitrary decrypted message. If it is not large enough to
 *                 hold the decryption of the particular ciphertext provided,
 *                 the function returns #MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 implicitly set to #MBEDTLS_RSA_PRIVATE.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PUBLIC and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE,
 *                 this is used for blinding and should be provided; see
 *                 mbedtls_rsa_private() for more. If \p mode is
 *                 #MBEDTLS_RSA_PUBLIC, it is ignored.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng is \c NULL or doesn't need a context.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated).
 * \param olen     The address at which to store the length of
 *                 the plaintext. This must not be \c NULL.
 * \param input    The ciphertext buffer. This must be a readable buffer
 *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 * \param output   The buffer used to hold the plaintext. This must
 *                 be a writable buffer of length \p output_max_len Bytes.
 * \param output_max_len The length in Bytes of the output buffer \p output.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 *
 */
int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx,
                                 int (*f_rng)(void *, unsigned char *, size_t),
                                 void *p_rng,
                                 int mode, size_t *olen,
                                 const unsigned char *input,
                                 unsigned char *output,
                                 size_t output_max_len );

/**
 * \brief            This function performs a PKCS#1 v2.1 OAEP decryption
 *                   operation (RSAES-OAEP-DECRYPT).
 *
 * \note             The output buffer length \c output_max_len should be
 *                   as large as the size \p ctx->len of \p ctx->N, for
 *                   example, 128 Bytes if RSA-1024 is used, to be able to
 *                   hold an arbitrary decrypted message. If it is not
 *                   large enough to hold the decryption of the particular
 *                   ciphertext provided, the function returns
 *                   #MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
 *
 * \deprecated       It is deprecated and discouraged to call this function
 *                   in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library
 *                   are likely to remove the \p mode argument and have it
 *                   implicitly set to #MBEDTLS_RSA_PRIVATE.
 *
 * \note             Alternative implementations of RSA need not support
 *                   mode being set to #MBEDTLS_RSA_PUBLIC and might instead
 *                   return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx        The initialized RSA context to use.
 * \param f_rng      The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE,
 *                   this is used for blinding and should be provided; see
 *                   mbedtls_rsa_private() for more. If \p mode is
 *                   #MBEDTLS_RSA_PUBLIC, it is ignored.
 * \param p_rng      The RNG context to be passed to \p f_rng. This may be
 *                   \c NULL if \p f_rng is \c NULL or doesn't need a context.
 * \param mode       The mode of operation. This must be either
 *                   #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated).
 * \param label      The buffer holding the custom label to use.
 *                   This must be a readable buffer of length \p label_len
 *                   Bytes. It may be \c NULL if \p label_len is \c 0.
 * \param label_len  The length of the label in Bytes.
 * \param olen       The address at which to store the length of
 *                   the plaintext. This must not be \c NULL.
 * \param input      The ciphertext buffer. This must be a readable buffer
 *                   of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                   for an 2048-bit RSA modulus.
 * \param output     The buffer used to hold the plaintext. This must
 *                   be a writable buffer of length \p output_max_len Bytes.
 * \param output_max_len The length in Bytes of the output buffer \p output.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx,
                            int (*f_rng)(void *, unsigned char *, size_t),
                            void *p_rng,
                            int mode,
                            const unsigned char *label, size_t label_len,
                            size_t *olen,
                            const unsigned char *input,
                            unsigned char *output,
                            size_t output_max_len );

/**
 * \brief          This function performs a private RSA operation to sign
 *                 a message digest using PKCS#1.
 *
 *                 It is the generic wrapper for performing a PKCS#1
 *                 signature using the \p mode from the context.
 *
 * \note           The \p sig buffer must be as large as the size
 *                 of \p ctx->N. For example, 128 Bytes if RSA-1024 is used.
 *
 * \note           For PKCS#1 v2.1 encoding, see comments on
 *                 mbedtls_rsa_rsassa_pss_sign() for details on
 *                 \p md_alg and \p hash_id.
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 implicitly set to #MBEDTLS_RSA_PRIVATE.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PUBLIC and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG function to use. If the padding mode is PKCS#1 v2.1,
 *                 this must be provided. If the padding mode is PKCS#1 v1.5 and
 *                 \p mode is #MBEDTLS_RSA_PRIVATE, it is used for blinding
 *                 and should be provided; see mbedtls_rsa_private() for more
 *                 more. It is ignored otherwise.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
 *                 if \p f_rng is \c NULL or doesn't need a context argument.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated).
 * \param md_alg   The message-digest algorithm used to hash the original data.
 *                 Use #MBEDTLS_MD_NONE for signing raw data.
 * \param hashlen  The length of the message digest.
 *                 Ths is only used if \p md_alg is #MBEDTLS_MD_NONE.
 * \param hash     The buffer holding the message digest or raw data.
 *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
 *                 buffer of length \p hashlen Bytes. If \p md_alg is not
 *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
 *                 the size of the hash corresponding to \p md_alg.
 * \param sig      The buffer to hold the signature. This must be a writable
 *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus. A buffer length of
 *                 #MBEDTLS_MPI_MAX_SIZE is always safe.
 *
 * \return         \c 0 if the signing operation was successful.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_pkcs1_sign( mbedtls_rsa_context *ctx,
                    int (*f_rng)(void *, unsigned char *, size_t),
                    void *p_rng,
                    int mode,
                    mbedtls_md_type_t md_alg,
                    unsigned int hashlen,
                    const unsigned char *hash,
                    unsigned char *sig );

/**
 * \brief          This function performs a PKCS#1 v1.5 signature
 *                 operation (RSASSA-PKCS1-v1_5-SIGN).
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 implicitly set to #MBEDTLS_RSA_PRIVATE.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PUBLIC and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE,
 *                 this is used for blinding and should be provided; see
 *                 mbedtls_rsa_private() for more. If \p mode is
 *                 #MBEDTLS_RSA_PUBLIC, it is ignored.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
 *                 if \p f_rng is \c NULL or doesn't need a context argument.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated).
 * \param md_alg   The message-digest algorithm used to hash the original data.
 *                 Use #MBEDTLS_MD_NONE for signing raw data.
 * \param hashlen  The length of the message digest.
 *                 Ths is only used if \p md_alg is #MBEDTLS_MD_NONE.
 * \param hash     The buffer holding the message digest or raw data.
 *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
 *                 buffer of length \p hashlen Bytes. If \p md_alg is not
 *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
 *                 the size of the hash corresponding to \p md_alg.
 * \param sig      The buffer to hold the signature. This must be a writable
 *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus. A buffer length of
 *                 #MBEDTLS_MPI_MAX_SIZE is always safe.
 *
 * \return         \c 0 if the signing operation was successful.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsassa_pkcs1_v15_sign( mbedtls_rsa_context *ctx,
                               int (*f_rng)(void *, unsigned char *, size_t),
                               void *p_rng,
                               int mode,
                               mbedtls_md_type_t md_alg,
                               unsigned int hashlen,
                               const unsigned char *hash,
                               unsigned char *sig );

/**
 * \brief          This function performs a PKCS#1 v2.1 PSS signature
 *                 operation (RSASSA-PSS-SIGN).
 *
 * \note           The \c hash_id set in \p ctx (when calling
 *                 mbedtls_rsa_init() or by calling mbedtls_rsa_set_padding()
 *                 afterwards) selects the hash used for the
 *                 encoding operation and for the mask generation function
 *                 (MGF1). For more details on the encoding operation and the
 *                 mask generation function, consult <em>RFC-3447: Public-Key
 *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
 *                 Specifications</em>.
 *
 * \note           This function enforces that the provided salt length complies
 *                 with FIPS 186-4 §5.5 (e) and RFC 8017 (PKCS#1 v2.2) §9.1.1
 *                 step 3. The constraint is that the hash length plus the salt
 *                 length plus 2 bytes must be at most the key length. If this
 *                 constraint is not met, this function returns
 *                 #MBEDTLS_ERR_RSA_BAD_INPUT_DATA.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG function. It must not be \c NULL.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
 *                 if \p f_rng doesn't need a context argument.
 * \param md_alg   The message-digest algorithm used to hash the original data.
 *                 Use #MBEDTLS_MD_NONE for signing raw data.
 * \param hashlen  The length of the message digest.
 *                 Ths is only used if \p md_alg is #MBEDTLS_MD_NONE.
 * \param hash     The buffer holding the message digest or raw data.
 *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
 *                 buffer of length \p hashlen Bytes. If \p md_alg is not
 *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
 *                 the size of the hash corresponding to \p md_alg.
 * \param saltlen  The length of the salt that should be used.
 *                 If passed #MBEDTLS_RSA_SALT_LEN_ANY, the function will use
 *                 the largest possible salt length up to the hash length,
 *                 which is the largest permitted by some standards including
 *                 FIPS 186-4 §5.5.
 * \param sig      The buffer to hold the signature. This must be a writable
 *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus. A buffer length of
 *                 #MBEDTLS_MPI_MAX_SIZE is always safe.
 *
 * \return         \c 0 if the signing operation was successful.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsassa_pss_sign_ext( mbedtls_rsa_context *ctx,
                         int (*f_rng)(void *, unsigned char *, size_t),
                         void *p_rng,
                         mbedtls_md_type_t md_alg,
                         unsigned int hashlen,
                         const unsigned char *hash,
                         int saltlen,
                         unsigned char *sig );

/**
 * \brief          This function performs a PKCS#1 v2.1 PSS signature
 *                 operation (RSASSA-PSS-SIGN).
 *
 * \note           The \c hash_id set in \p ctx (when calling
 *                 mbedtls_rsa_init() or by calling mbedtls_rsa_set_padding()
 *                 afterwards) selects the hash used for the
 *                 encoding operation and for the mask generation function
 *                 (MGF1). For more details on the encoding operation and the
 *                 mask generation function, consult <em>RFC-3447: Public-Key
 *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
 *                 Specifications</em>.
 *
 * \note           This function always uses the maximum possible salt size,
 *                 up to the length of the payload hash. This choice of salt
 *                 size complies with FIPS 186-4 §5.5 (e) and RFC 8017 (PKCS#1
 *                 v2.2) §9.1.1 step 3. Furthermore this function enforces a
 *                 minimum salt size which is the hash size minus 2 bytes. If
 *                 this minimum size is too large given the key size (the salt
 *                 size, plus the hash size, plus 2 bytes must be no more than
 *                 the key size in bytes), this function returns
 *                 #MBEDTLS_ERR_RSA_BAD_INPUT_DATA.
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 implicitly set to #MBEDTLS_RSA_PRIVATE.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PUBLIC and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA context to use.
 * \param f_rng    The RNG function. It must not be \c NULL.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
 *                 if \p f_rng doesn't need a context argument.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated).
 * \param md_alg   The message-digest algorithm used to hash the original data.
 *                 Use #MBEDTLS_MD_NONE for signing raw data.
 * \param hashlen  The length of the message digest.
 *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
 * \param hash     The buffer holding the message digest or raw data.
 *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
 *                 buffer of length \p hashlen Bytes. If \p md_alg is not
 *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
 *                 the size of the hash corresponding to \p md_alg.
 * \param sig      The buffer to hold the signature. This must be a writable
 *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus. A buffer length of
 *                 #MBEDTLS_MPI_MAX_SIZE is always safe.
 *
 * \return         \c 0 if the signing operation was successful.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
                         int (*f_rng)(void *, unsigned char *, size_t),
                         void *p_rng,
                         int mode,
                         mbedtls_md_type_t md_alg,
                         unsigned int hashlen,
                         const unsigned char *hash,
                         unsigned char *sig );

/**
 * \brief          This function performs a public RSA operation and checks
 *                 the message digest.
 *
 *                 This is the generic wrapper for performing a PKCS#1
 *                 verification using the mode from the context.
 *
 * \note           For PKCS#1 v2.1 encoding, see comments on
 *                 mbedtls_rsa_rsassa_pss_verify() about \p md_alg and
 *                 \p hash_id.
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 set to #MBEDTLS_RSA_PUBLIC.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PRIVATE and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA public key context to use.
 * \param f_rng    The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
 *                 this is used for blinding and should be provided; see
 *                 mbedtls_rsa_private() for more. Otherwise, it is ignored.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng is \c NULL or doesn't need a context.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated).
 * \param md_alg   The message-digest algorithm used to hash the original data.
 *                 Use #MBEDTLS_MD_NONE for signing raw data.
 * \param hashlen  The length of the message digest.
 *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
 * \param hash     The buffer holding the message digest or raw data.
 *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
 *                 buffer of length \p hashlen Bytes. If \p md_alg is not
 *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
 *                 the size of the hash corresponding to \p md_alg.
 * \param sig      The buffer holding the signature. This must be a readable
 *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 *
 * \return         \c 0 if the verify operation was successful.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_pkcs1_verify( mbedtls_rsa_context *ctx,
                      int (*f_rng)(void *, unsigned char *, size_t),
                      void *p_rng,
                      int mode,
                      mbedtls_md_type_t md_alg,
                      unsigned int hashlen,
                      const unsigned char *hash,
                      const unsigned char *sig );

/**
 * \brief          This function performs a PKCS#1 v1.5 verification
 *                 operation (RSASSA-PKCS1-v1_5-VERIFY).
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 set to #MBEDTLS_RSA_PUBLIC.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PRIVATE and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA public key context to use.
 * \param f_rng    The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
 *                 this is used for blinding and should be provided; see
 *                 mbedtls_rsa_private() for more. Otherwise, it is ignored.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng is \c NULL or doesn't need a context.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated).
 * \param md_alg   The message-digest algorithm used to hash the original data.
 *                 Use #MBEDTLS_MD_NONE for signing raw data.
 * \param hashlen  The length of the message digest.
 *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
 * \param hash     The buffer holding the message digest or raw data.
 *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
 *                 buffer of length \p hashlen Bytes. If \p md_alg is not
 *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
 *                 the size of the hash corresponding to \p md_alg.
 * \param sig      The buffer holding the signature. This must be a readable
 *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 *
 * \return         \c 0 if the verify operation was successful.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsassa_pkcs1_v15_verify( mbedtls_rsa_context *ctx,
                                 int (*f_rng)(void *, unsigned char *, size_t),
                                 void *p_rng,
                                 int mode,
                                 mbedtls_md_type_t md_alg,
                                 unsigned int hashlen,
                                 const unsigned char *hash,
                                 const unsigned char *sig );

/**
 * \brief          This function performs a PKCS#1 v2.1 PSS verification
 *                 operation (RSASSA-PSS-VERIFY).
 *
 * \note           The \c hash_id set in \p ctx (when calling
 *                 mbedtls_rsa_init() or by calling mbedtls_rsa_set_padding()
 *                 afterwards) selects the hash used for the
 *                 encoding operation and for the mask generation function
 *                 (MGF1). For more details on the encoding operation and the
 *                 mask generation function, consult <em>RFC-3447: Public-Key
 *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
 *                 Specifications</em>. If the \c hash_id set in \p ctx is
 *                 #MBEDTLS_MD_NONE, the \p md_alg parameter is used.
 *
 * \deprecated     It is deprecated and discouraged to call this function
 *                 in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library
 *                 are likely to remove the \p mode argument and have it
 *                 implicitly set to #MBEDTLS_RSA_PUBLIC.
 *
 * \note           Alternative implementations of RSA need not support
 *                 mode being set to #MBEDTLS_RSA_PRIVATE and might instead
 *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
 *
 * \param ctx      The initialized RSA public key context to use.
 * \param f_rng    The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
 *                 this is used for blinding and should be provided; see
 *                 mbedtls_rsa_private() for more. Otherwise, it is ignored.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng is \c NULL or doesn't need a context.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated).
 * \param md_alg   The message-digest algorithm used to hash the original data.
 *                 Use #MBEDTLS_MD_NONE for signing raw data.
 * \param hashlen  The length of the message digest.
 *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
 * \param hash     The buffer holding the message digest or raw data.
 *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
 *                 buffer of length \p hashlen Bytes. If \p md_alg is not
 *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
 *                 the size of the hash corresponding to \p md_alg.
 * \param sig      The buffer holding the signature. This must be a readable
 *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 *
 * \return         \c 0 if the verify operation was successful.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx,
                           int (*f_rng)(void *, unsigned char *, size_t),
                           void *p_rng,
                           int mode,
                           mbedtls_md_type_t md_alg,
                           unsigned int hashlen,
                           const unsigned char *hash,
                           const unsigned char *sig );

/**
 * \brief          This function performs a PKCS#1 v2.1 PSS verification
 *                 operation (RSASSA-PSS-VERIFY).
 *
 * \note           The \p sig buffer must be as large as the size
 *                 of \p ctx->N. For example, 128 Bytes if RSA-1024 is used.
 *
 * \note           The \c hash_id set in \p ctx (when calling
 *                 mbedtls_rsa_init() or by calling mbedtls_rsa_set_padding()
 *                 afterwards) is ignored.
 *
 * \param ctx      The initialized RSA public key context to use.
 * \param f_rng    The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
 *                 this is used for blinding and should be provided; see
 *                 mbedtls_rsa_private() for more. Otherwise, it is ignored.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng is \c NULL or doesn't need a context.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE.
 * \param md_alg   The message-digest algorithm used to hash the original data.
 *                 Use #MBEDTLS_MD_NONE for signing raw data.
 * \param hashlen  The length of the message digest.
 *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
 * \param hash     The buffer holding the message digest or raw data.
 *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
 *                 buffer of length \p hashlen Bytes. If \p md_alg is not
 *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
 *                 the size of the hash corresponding to \p md_alg.
 * \param mgf1_hash_id      The message digest algorithm used for the
 *                          verification operation and the mask generation
 *                          function (MGF1). For more details on the encoding
 *                          operation and the mask generation function, consult
 *                          <em>RFC-3447: Public-Key Cryptography Standards
 *                          (PKCS) #1 v2.1: RSA Cryptography
 *                          Specifications</em>.
 * \param expected_salt_len The length of the salt used in padding. Use
 *                          #MBEDTLS_RSA_SALT_LEN_ANY to accept any salt length.
 * \param sig      The buffer holding the signature. This must be a readable
 *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
 *                 for an 2048-bit RSA modulus.
 *
 * \return         \c 0 if the verify operation was successful.
 * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
 */
int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
                               int (*f_rng)(void *, unsigned char *, size_t),
                               void *p_rng,
                               int mode,
                               mbedtls_md_type_t md_alg,
                               unsigned int hashlen,
                               const unsigned char *hash,
                               mbedtls_md_type_t mgf1_hash_id,
                               int expected_salt_len,
                               const unsigned char *sig );

/**
 * \brief          This function copies the components of an RSA context.
 *
 * \param dst      The destination context. This must be initialized.
 * \param src      The source context. This must be initialized.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory allocation failure.
 */
int mbedtls_rsa_copy( mbedtls_rsa_context *dst, const mbedtls_rsa_context *src );

/**
 * \brief          This function frees the components of an RSA key.
 *
 * \param ctx      The RSA context to free. May be \c NULL, in which case
 *                 this function is a no-op. If it is not \c NULL, it must
 *                 point to an initialized RSA context.
 */
void mbedtls_rsa_free( mbedtls_rsa_context *ctx );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          The RSA checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
int mbedtls_rsa_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* rsa.h */


/********* Start of file include/mbedtls/rsa_internal.h ************/

/**
 * \file rsa_internal.h
 *
 * \brief Context-independent RSA helper functions
 *
 *  This module declares some RSA-related helper functions useful when
 *  implementing the RSA interface. These functions are provided in a separate
 *  compilation unit in order to make it easy for designers of alternative RSA
 *  implementations to use them in their own code, as it is conceived that the
 *  functionality they provide will be necessary for most complete
 *  implementations.
 *
 *  End-users of Mbed TLS who are not providing their own alternative RSA
 *  implementations should not use these functions directly, and should instead
 *  use only the functions declared in rsa.h.
 *
 *  The interface provided by this module will be maintained through LTS (Long
 *  Term Support) branches of Mbed TLS, but may otherwise be subject to change,
 *  and must be considered an internal interface of the library.
 *
 *  There are two classes of helper functions:
 *
 *  (1) Parameter-generating helpers. These are:
 *      - mbedtls_rsa_deduce_primes
 *      - mbedtls_rsa_deduce_private_exponent
 *      - mbedtls_rsa_deduce_crt
 *       Each of these functions takes a set of core RSA parameters and
 *       generates some other, or CRT related parameters.
 *
 *  (2) Parameter-checking helpers. These are:
 *      - mbedtls_rsa_validate_params
 *      - mbedtls_rsa_validate_crt
 *      They take a set of core or CRT related RSA parameters and check their
 *      validity.
 *
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

#ifndef MBEDTLS_RSA_INTERNAL_H
#define MBEDTLS_RSA_INTERNAL_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#ifdef __cplusplus
extern "C" {
#endif


/**
 * \brief          Compute RSA prime moduli P, Q from public modulus N=PQ
 *                 and a pair of private and public key.
 *
 * \note           This is a 'static' helper function not operating on
 *                 an RSA context. Alternative implementations need not
 *                 overwrite it.
 *
 * \param N        RSA modulus N = PQ, with P, Q to be found
 * \param E        RSA public exponent
 * \param D        RSA private exponent
 * \param P        Pointer to MPI holding first prime factor of N on success
 * \param Q        Pointer to MPI holding second prime factor of N on success
 *
 * \return
 *                 - 0 if successful. In this case, P and Q constitute a
 *                   factorization of N.
 *                 - A non-zero error code otherwise.
 *
 * \note           It is neither checked that P, Q are prime nor that
 *                 D, E are modular inverses wrt. P-1 and Q-1. For that,
 *                 use the helper function \c mbedtls_rsa_validate_params.
 *
 */
int mbedtls_rsa_deduce_primes( mbedtls_mpi const *N, mbedtls_mpi const *E,
                               mbedtls_mpi const *D,
                               mbedtls_mpi *P, mbedtls_mpi *Q );

/**
 * \brief          Compute RSA private exponent from
 *                 prime moduli and public key.
 *
 * \note           This is a 'static' helper function not operating on
 *                 an RSA context. Alternative implementations need not
 *                 overwrite it.
 *
 * \param P        First prime factor of RSA modulus
 * \param Q        Second prime factor of RSA modulus
 * \param E        RSA public exponent
 * \param D        Pointer to MPI holding the private exponent on success.
 *
 * \return
 *                 - 0 if successful. In this case, D is set to a simultaneous
 *                   modular inverse of E modulo both P-1 and Q-1.
 *                 - A non-zero error code otherwise.
 *
 * \note           This function does not check whether P and Q are primes.
 *
 */
int mbedtls_rsa_deduce_private_exponent( mbedtls_mpi const *P,
                                         mbedtls_mpi const *Q,
                                         mbedtls_mpi const *E,
                                         mbedtls_mpi *D );


/**
 * \brief          Generate RSA-CRT parameters
 *
 * \note           This is a 'static' helper function not operating on
 *                 an RSA context. Alternative implementations need not
 *                 overwrite it.
 *
 * \param P        First prime factor of N
 * \param Q        Second prime factor of N
 * \param D        RSA private exponent
 * \param DP       Output variable for D modulo P-1
 * \param DQ       Output variable for D modulo Q-1
 * \param QP       Output variable for the modular inverse of Q modulo P.
 *
 * \return         0 on success, non-zero error code otherwise.
 *
 * \note           This function does not check whether P, Q are
 *                 prime and whether D is a valid private exponent.
 *
 */
int mbedtls_rsa_deduce_crt( const mbedtls_mpi *P, const mbedtls_mpi *Q,
                            const mbedtls_mpi *D, mbedtls_mpi *DP,
                            mbedtls_mpi *DQ, mbedtls_mpi *QP );


/**
 * \brief          Check validity of core RSA parameters
 *
 * \note           This is a 'static' helper function not operating on
 *                 an RSA context. Alternative implementations need not
 *                 overwrite it.
 *
 * \param N        RSA modulus N = PQ
 * \param P        First prime factor of N
 * \param Q        Second prime factor of N
 * \param D        RSA private exponent
 * \param E        RSA public exponent
 * \param f_rng    PRNG to be used for primality check, or NULL
 * \param p_rng    PRNG context for f_rng, or NULL
 *
 * \return
 *                 - 0 if the following conditions are satisfied
 *                   if all relevant parameters are provided:
 *                    - P prime if f_rng != NULL (%)
 *                    - Q prime if f_rng != NULL (%)
 *                    - 1 < N = P * Q
 *                    - 1 < D, E < N
 *                    - D and E are modular inverses modulo P-1 and Q-1
 *                   (%) This is only done if MBEDTLS_GENPRIME is defined.
 *                 - A non-zero error code otherwise.
 *
 * \note           The function can be used with a restricted set of arguments
 *                 to perform specific checks only. E.g., calling it with
 *                 (-,P,-,-,-) and a PRNG amounts to a primality check for P.
 */
int mbedtls_rsa_validate_params( const mbedtls_mpi *N, const mbedtls_mpi *P,
                                 const mbedtls_mpi *Q, const mbedtls_mpi *D,
                                 const mbedtls_mpi *E,
                                 int (*f_rng)(void *, unsigned char *, size_t),
                                 void *p_rng );

/**
 * \brief          Check validity of RSA CRT parameters
 *
 * \note           This is a 'static' helper function not operating on
 *                 an RSA context. Alternative implementations need not
 *                 overwrite it.
 *
 * \param P        First prime factor of RSA modulus
 * \param Q        Second prime factor of RSA modulus
 * \param D        RSA private exponent
 * \param DP       MPI to check for D modulo P-1
 * \param DQ       MPI to check for D modulo P-1
 * \param QP       MPI to check for the modular inverse of Q modulo P.
 *
 * \return
 *                 - 0 if the following conditions are satisfied:
 *                    - D = DP mod P-1 if P, D, DP != NULL
 *                    - Q = DQ mod P-1 if P, D, DQ != NULL
 *                    - QP = Q^-1 mod P if P, Q, QP != NULL
 *                 - \c MBEDTLS_ERR_RSA_KEY_CHECK_FAILED if check failed,
 *                   potentially including \c MBEDTLS_ERR_MPI_XXX if some
 *                   MPI calculations failed.
 *                 - \c MBEDTLS_ERR_RSA_BAD_INPUT_DATA if insufficient
 *                   data was provided to check DP, DQ or QP.
 *
 * \note           The function can be used with a restricted set of arguments
 *                 to perform specific checks only. E.g., calling it with the
 *                 parameters (P, -, D, DP, -, -) will check DP = D mod P-1.
 */
int mbedtls_rsa_validate_crt( const mbedtls_mpi *P,  const mbedtls_mpi *Q,
                              const mbedtls_mpi *D,  const mbedtls_mpi *DP,
                              const mbedtls_mpi *DQ, const mbedtls_mpi *QP );

#ifdef __cplusplus
}
#endif

#endif /* rsa_internal.h */


/********* Start of file include/mbedtls/asn1.h ************/

/**
 * \file asn1.h
 *
 * \brief Generic ASN.1 parsing
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_ASN1_H
#define MBEDTLS_ASN1_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

#if defined(MBEDTLS_BIGNUM_C)

#endif

/**
 * \addtogroup asn1_module
 * \{
 */

/**
 * \name ASN1 Error codes
 * These error codes are OR'ed to X509 error codes for
 * higher error granularity.
 * ASN1 is a standard to specify data structures.
 * \{
 */
/** Out of data when parsing an ASN1 data structure. */
#define MBEDTLS_ERR_ASN1_OUT_OF_DATA                      -0x0060
/** ASN1 tag was of an unexpected value. */
#define MBEDTLS_ERR_ASN1_UNEXPECTED_TAG                   -0x0062
/** Error when trying to determine the length or invalid length. */
#define MBEDTLS_ERR_ASN1_INVALID_LENGTH                   -0x0064
/** Actual length differs from expected length. */
#define MBEDTLS_ERR_ASN1_LENGTH_MISMATCH                  -0x0066
/** Data is invalid. */
#define MBEDTLS_ERR_ASN1_INVALID_DATA                     -0x0068
/** Memory allocation failed */
#define MBEDTLS_ERR_ASN1_ALLOC_FAILED                     -0x006A
/** Buffer too small when writing ASN.1 data structure. */
#define MBEDTLS_ERR_ASN1_BUF_TOO_SMALL                    -0x006C

/* \} name */

/**
 * \name DER constants
 * These constants comply with the DER encoded ASN.1 type tags.
 * DER encoding uses hexadecimal representation.
 * An example DER sequence is:\n
 * - 0x02 -- tag indicating INTEGER
 * - 0x01 -- length in octets
 * - 0x05 -- value
 * Such sequences are typically read into \c ::mbedtls_x509_buf.
 * \{
 */
#define MBEDTLS_ASN1_BOOLEAN                 0x01
#define MBEDTLS_ASN1_INTEGER                 0x02
#define MBEDTLS_ASN1_BIT_STRING              0x03
#define MBEDTLS_ASN1_OCTET_STRING            0x04
#define MBEDTLS_ASN1_NULL                    0x05
#define MBEDTLS_ASN1_OID                     0x06
#define MBEDTLS_ASN1_ENUMERATED              0x0A
#define MBEDTLS_ASN1_UTF8_STRING             0x0C
#define MBEDTLS_ASN1_SEQUENCE                0x10
#define MBEDTLS_ASN1_SET                     0x11
#define MBEDTLS_ASN1_PRINTABLE_STRING        0x13
#define MBEDTLS_ASN1_T61_STRING              0x14
#define MBEDTLS_ASN1_IA5_STRING              0x16
#define MBEDTLS_ASN1_UTC_TIME                0x17
#define MBEDTLS_ASN1_GENERALIZED_TIME        0x18
#define MBEDTLS_ASN1_UNIVERSAL_STRING        0x1C
#define MBEDTLS_ASN1_BMP_STRING              0x1E
#define MBEDTLS_ASN1_PRIMITIVE               0x00
#define MBEDTLS_ASN1_CONSTRUCTED             0x20
#define MBEDTLS_ASN1_CONTEXT_SPECIFIC        0x80

/* Slightly smaller way to check if tag is a string tag
 * compared to canonical implementation. */
#define MBEDTLS_ASN1_IS_STRING_TAG( tag )                                     \
    ( ( tag ) < 32u && (                                                      \
        ( ( 1u << ( tag ) ) & ( ( 1u << MBEDTLS_ASN1_BMP_STRING )       |     \
                                ( 1u << MBEDTLS_ASN1_UTF8_STRING )      |     \
                                ( 1u << MBEDTLS_ASN1_T61_STRING )       |     \
                                ( 1u << MBEDTLS_ASN1_IA5_STRING )       |     \
                                ( 1u << MBEDTLS_ASN1_UNIVERSAL_STRING ) |     \
                                ( 1u << MBEDTLS_ASN1_PRINTABLE_STRING ) |     \
                                ( 1u << MBEDTLS_ASN1_BIT_STRING ) ) ) != 0 ) )

/*
 * Bit masks for each of the components of an ASN.1 tag as specified in
 * ITU X.690 (08/2015), section 8.1 "General rules for encoding",
 * paragraph 8.1.2.2:
 *
 * Bit  8     7   6   5          1
 *     +-------+-----+------------+
 *     | Class | P/C | Tag number |
 *     +-------+-----+------------+
 */
#define MBEDTLS_ASN1_TAG_CLASS_MASK          0xC0
#define MBEDTLS_ASN1_TAG_PC_MASK             0x20
#define MBEDTLS_ASN1_TAG_VALUE_MASK          0x1F

/* \} name */
/* \} addtogroup asn1_module */

/** Returns the size of the binary string, without the trailing \\0 */
#define MBEDTLS_OID_SIZE(x) (sizeof(x) - 1)

/**
 * Compares an mbedtls_asn1_buf structure to a reference OID.
 *
 * Only works for 'defined' oid_str values (MBEDTLS_OID_HMAC_SHA1), you cannot use a
 * 'unsigned char *oid' here!
 */
#define MBEDTLS_OID_CMP(oid_str, oid_buf)                                   \
        ( ( MBEDTLS_OID_SIZE(oid_str) != (oid_buf)->len ) ||                \
          memcmp( (oid_str), (oid_buf)->p, (oid_buf)->len) != 0 )

#define MBEDTLS_OID_CMP_RAW(oid_str, oid_buf, oid_buf_len)              \
        ( ( MBEDTLS_OID_SIZE(oid_str) != (oid_buf_len) ) ||             \
          memcmp( (oid_str), (oid_buf), (oid_buf_len) ) != 0 )

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \name Functions to parse ASN.1 data structures
 * \{
 */

/**
 * Type-length-value structure that allows for ASN1 using DER.
 */
typedef struct mbedtls_asn1_buf
{
    int tag;                /**< ASN1 type, e.g. MBEDTLS_ASN1_UTF8_STRING. */
    size_t len;             /**< ASN1 length, in octets. */
    unsigned char *p;       /**< ASN1 data, e.g. in ASCII. */
}
mbedtls_asn1_buf;

/**
 * Container for ASN1 bit strings.
 */
typedef struct mbedtls_asn1_bitstring
{
    size_t len;                 /**< ASN1 length, in octets. */
    unsigned char unused_bits;  /**< Number of unused bits at the end of the string */
    unsigned char *p;           /**< Raw ASN1 data for the bit string */
}
mbedtls_asn1_bitstring;

/**
 * Container for a sequence of ASN.1 items
 */
typedef struct mbedtls_asn1_sequence
{
    mbedtls_asn1_buf buf;                   /**< Buffer containing the given ASN.1 item. */
    struct mbedtls_asn1_sequence *next;    /**< The next entry in the sequence. */
}
mbedtls_asn1_sequence;

/**
 * Container for a sequence or list of 'named' ASN.1 data items
 */
typedef struct mbedtls_asn1_named_data
{
    mbedtls_asn1_buf oid;                   /**< The object identifier. */
    mbedtls_asn1_buf val;                   /**< The named value. */
    struct mbedtls_asn1_named_data *next;  /**< The next entry in the sequence. */
    unsigned char next_merged;      /**< Merge next item into the current one? */
}
mbedtls_asn1_named_data;

/**
 * \brief       Get the length of an ASN.1 element.
 *              Updates the pointer to immediately behind the length.
 *
 * \param p     On entry, \c *p points to the first byte of the length,
 *              i.e. immediately after the tag.
 *              On successful completion, \c *p points to the first byte
 *              after the length, i.e. the first byte of the content.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param len   On successful completion, \c *len contains the length
 *              read from the ASN.1 input.
 *
 * \return      0 if successful.
 * \return      #MBEDTLS_ERR_ASN1_OUT_OF_DATA if the ASN.1 element
 *              would end beyond \p end.
 * \return      #MBEDTLS_ERR_ASN1_INVALID_LENGTH if the length is unparseable.
 */
int mbedtls_asn1_get_len( unsigned char **p,
                          const unsigned char *end,
                          size_t *len );

/**
 * \brief       Get the tag and length of the element.
 *              Check for the requested tag.
 *              Updates the pointer to immediately behind the tag and length.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p points to the first byte
 *              after the length, i.e. the first byte of the content.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param len   On successful completion, \c *len contains the length
 *              read from the ASN.1 input.
 * \param tag   The expected tag.
 *
 * \return      0 if successful.
 * \return      #MBEDTLS_ERR_ASN1_UNEXPECTED_TAG if the data does not start
 *              with the requested tag.
 * \return      #MBEDTLS_ERR_ASN1_OUT_OF_DATA if the ASN.1 element
 *              would end beyond \p end.
 * \return      #MBEDTLS_ERR_ASN1_INVALID_LENGTH if the length is unparseable.
 */
int mbedtls_asn1_get_tag( unsigned char **p,
                          const unsigned char *end,
                          size_t *len, int tag );

/**
 * \brief       Retrieve a boolean ASN.1 tag and its value.
 *              Updates the pointer to immediately behind the full tag.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p points to the first byte
 *              beyond the ASN.1 element.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param val   On success, the parsed value (\c 0 or \c 1).
 *
 * \return      0 if successful.
 * \return      An ASN.1 error code if the input does not start with
 *              a valid ASN.1 BOOLEAN.
 */
int mbedtls_asn1_get_bool( unsigned char **p,
                           const unsigned char *end,
                           int *val );

/**
 * \brief       Retrieve an integer ASN.1 tag and its value.
 *              Updates the pointer to immediately behind the full tag.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p points to the first byte
 *              beyond the ASN.1 element.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param val   On success, the parsed value.
 *
 * \return      0 if successful.
 * \return      An ASN.1 error code if the input does not start with
 *              a valid ASN.1 INTEGER.
 * \return      #MBEDTLS_ERR_ASN1_INVALID_LENGTH if the parsed value does
 *              not fit in an \c int.
 */
int mbedtls_asn1_get_int( unsigned char **p,
                          const unsigned char *end,
                          int *val );

/**
 * \brief       Retrieve an enumerated ASN.1 tag and its value.
 *              Updates the pointer to immediately behind the full tag.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p points to the first byte
 *              beyond the ASN.1 element.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param val   On success, the parsed value.
 *
 * \return      0 if successful.
 * \return      An ASN.1 error code if the input does not start with
 *              a valid ASN.1 ENUMERATED.
 * \return      #MBEDTLS_ERR_ASN1_INVALID_LENGTH if the parsed value does
 *              not fit in an \c int.
 */
int mbedtls_asn1_get_enum( unsigned char **p,
                           const unsigned char *end,
                           int *val );

/**
 * \brief       Retrieve a bitstring ASN.1 tag and its value.
 *              Updates the pointer to immediately behind the full tag.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p is equal to \p end.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param bs    On success, ::mbedtls_asn1_bitstring information about
 *              the parsed value.
 *
 * \return      0 if successful.
 * \return      #MBEDTLS_ERR_ASN1_LENGTH_MISMATCH if the input contains
 *              extra data after a valid BIT STRING.
 * \return      An ASN.1 error code if the input does not start with
 *              a valid ASN.1 BIT STRING.
 */
int mbedtls_asn1_get_bitstring( unsigned char **p, const unsigned char *end,
                                mbedtls_asn1_bitstring *bs );

/**
 * \brief       Retrieve a bitstring ASN.1 tag without unused bits and its
 *              value.
 *              Updates the pointer to the beginning of the bit/octet string.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p points to the first byte
 *              of the content of the BIT STRING.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param len   On success, \c *len is the length of the content in bytes.
 *
 * \return      0 if successful.
 * \return      #MBEDTLS_ERR_ASN1_INVALID_DATA if the input starts with
 *              a valid BIT STRING with a nonzero number of unused bits.
 * \return      An ASN.1 error code if the input does not start with
 *              a valid ASN.1 BIT STRING.
 */
int mbedtls_asn1_get_bitstring_null( unsigned char **p,
                                     const unsigned char *end,
                                     size_t *len );

/**
 * \brief       Parses and splits an ASN.1 "SEQUENCE OF <tag>".
 *              Updates the pointer to immediately behind the full sequence tag.
 *
 * This function allocates memory for the sequence elements. You can free
 * the allocated memory with mbedtls_asn1_sequence_free().
 *
 * \note        On error, this function may return a partial list in \p cur.
 *              You must set `cur->next = NULL` before calling this function!
 *              Otherwise it is impossible to distinguish a previously non-null
 *              pointer from a pointer to an object allocated by this function.
 *
 * \note        If the sequence is empty, this function does not modify
 *              \c *cur. If the sequence is valid and non-empty, this
 *              function sets `cur->buf.tag` to \p tag. This allows
 *              callers to distinguish between an empty sequence and
 *              a one-element sequence.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p is equal to \p end.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param cur   A ::mbedtls_asn1_sequence which this function fills.
 *              When this function returns, \c *cur is the head of a linked
 *              list. Each node in this list is allocated with
 *              mbedtls_calloc() apart from \p cur itself, and should
 *              therefore be freed with mbedtls_free().
 *              The list describes the content of the sequence.
 *              The head of the list (i.e. \c *cur itself) describes the
 *              first element, `*cur->next` describes the second element, etc.
 *              For each element, `buf.tag == tag`, `buf.len` is the length
 *              of the content of the content of the element, and `buf.p`
 *              points to the first byte of the content (i.e. immediately
 *              past the length of the element).
 *              Note that list elements may be allocated even on error.
 * \param tag   Each element of the sequence must have this tag.
 *
 * \return      0 if successful.
 * \return      #MBEDTLS_ERR_ASN1_LENGTH_MISMATCH if the input contains
 *              extra data after a valid SEQUENCE OF \p tag.
 * \return      #MBEDTLS_ERR_ASN1_UNEXPECTED_TAG if the input starts with
 *              an ASN.1 SEQUENCE in which an element has a tag that
 *              is different from \p tag.
 * \return      #MBEDTLS_ERR_ASN1_ALLOC_FAILED if a memory allocation failed.
 * \return      An ASN.1 error code if the input does not start with
 *              a valid ASN.1 SEQUENCE.
 */
int mbedtls_asn1_get_sequence_of( unsigned char **p,
                                  const unsigned char *end,
                                  mbedtls_asn1_sequence *cur,
                                  int tag );
/**
 * \brief          Free a heap-allocated linked list presentation of
 *                 an ASN.1 sequence, including the first element.
 *
 * There are two common ways to manage the memory used for the representation
 * of a parsed ASN.1 sequence:
 * - Allocate a head node `mbedtls_asn1_sequence *head` with mbedtls_calloc().
 *   Pass this node as the `cur` argument to mbedtls_asn1_get_sequence_of().
 *   When you have finished processing the sequence,
 *   call mbedtls_asn1_sequence_free() on `head`.
 * - Allocate a head node `mbedtls_asn1_sequence *head` in any manner,
 *   for example on the stack. Make sure that `head->next == NULL`.
 *   Pass `head` as the `cur` argument to mbedtls_asn1_get_sequence_of().
 *   When you have finished processing the sequence,
 *   call mbedtls_asn1_sequence_free() on `head->cur`,
 *   then free `head` itself in the appropriate manner.
 *
 * \param seq      The address of the first sequence component. This may
 *                 be \c NULL, in which case this functions returns
 *                 immediately.
 */
void mbedtls_asn1_sequence_free( mbedtls_asn1_sequence *seq );

/**
 * \brief                Traverse an ASN.1 SEQUENCE container and
 *                       call a callback for each entry.
 *
 * This function checks that the input is a SEQUENCE of elements that
 * each have a "must" tag, and calls a callback function on the elements
 * that have a "may" tag.
 *
 * For example, to validate that the input is a SEQUENCE of `tag1` and call
 * `cb` on each element, use
 * ```
 * mbedtls_asn1_traverse_sequence_of(&p, end, 0xff, tag1, 0, 0, cb, ctx);
 * ```
 *
 * To validate that the input is a SEQUENCE of ANY and call `cb` on
 * each element, use
 * ```
 * mbedtls_asn1_traverse_sequence_of(&p, end, 0, 0, 0, 0, cb, ctx);
 * ```
 *
 * To validate that the input is a SEQUENCE of CHOICE {NULL, OCTET STRING}
 * and call `cb` on each element that is an OCTET STRING, use
 * ```
 * mbedtls_asn1_traverse_sequence_of(&p, end, 0xfe, 0x04, 0xff, 0x04, cb, ctx);
 * ```
 *
 * The callback is called on the elements with a "may" tag from left to
 * right. If the input is not a valid SEQUENCE of elements with a "must" tag,
 * the callback is called on the elements up to the leftmost point where
 * the input is invalid.
 *
 * \warning              This function is still experimental and may change
 *                       at any time.
 *
 * \param p              The address of the pointer to the beginning of
 *                       the ASN.1 SEQUENCE header. This is updated to
 *                       point to the end of the ASN.1 SEQUENCE container
 *                       on a successful invocation.
 * \param end            The end of the ASN.1 SEQUENCE container.
 * \param tag_must_mask  A mask to be applied to the ASN.1 tags found within
 *                       the SEQUENCE before comparing to \p tag_must_value.
 * \param tag_must_val   The required value of each ASN.1 tag found in the
 *                       SEQUENCE, after masking with \p tag_must_mask.
 *                       Mismatching tags lead to an error.
 *                       For example, a value of \c 0 for both \p tag_must_mask
 *                       and \p tag_must_val means that every tag is allowed,
 *                       while a value of \c 0xFF for \p tag_must_mask means
 *                       that \p tag_must_val is the only allowed tag.
 * \param tag_may_mask   A mask to be applied to the ASN.1 tags found within
 *                       the SEQUENCE before comparing to \p tag_may_value.
 * \param tag_may_val    The desired value of each ASN.1 tag found in the
 *                       SEQUENCE, after masking with \p tag_may_mask.
 *                       Mismatching tags will be silently ignored.
 *                       For example, a value of \c 0 for \p tag_may_mask and
 *                       \p tag_may_val means that any tag will be considered,
 *                       while a value of \c 0xFF for \p tag_may_mask means
 *                       that all tags with value different from \p tag_may_val
 *                       will be ignored.
 * \param cb             The callback to trigger for each component
 *                       in the ASN.1 SEQUENCE that matches \p tag_may_val.
 *                       The callback function is called with the following
 *                       parameters:
 *                       - \p ctx.
 *                       - The tag of the current element.
 *                       - A pointer to the start of the current element's
 *                         content inside the input.
 *                       - The length of the content of the current element.
 *                       If the callback returns a non-zero value,
 *                       the function stops immediately,
 *                       forwarding the callback's return value.
 * \param ctx            The context to be passed to the callback \p cb.
 *
 * \return               \c 0 if successful the entire ASN.1 SEQUENCE
 *                       was traversed without parsing or callback errors.
 * \return               #MBEDTLS_ERR_ASN1_LENGTH_MISMATCH if the input
 *                       contains extra data after a valid SEQUENCE
 *                       of elements with an accepted tag.
 * \return               #MBEDTLS_ERR_ASN1_UNEXPECTED_TAG if the input starts
 *                       with an ASN.1 SEQUENCE in which an element has a tag
 *                       that is not accepted.
 * \return               An ASN.1 error code if the input does not start with
 *                       a valid ASN.1 SEQUENCE.
 * \return               A non-zero error code forwarded from the callback
 *                       \p cb in case the latter returns a non-zero value.
 */
int mbedtls_asn1_traverse_sequence_of(
    unsigned char **p,
    const unsigned char *end,
    unsigned char tag_must_mask, unsigned char tag_must_val,
    unsigned char tag_may_mask, unsigned char tag_may_val,
    int (*cb)( void *ctx, int tag,
               unsigned char* start, size_t len ),
    void *ctx );

#if defined(MBEDTLS_BIGNUM_C)
/**
 * \brief       Retrieve an integer ASN.1 tag and its value.
 *              Updates the pointer to immediately behind the full tag.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p points to the first byte
 *              beyond the ASN.1 element.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param X     On success, the parsed value.
 *
 * \return      0 if successful.
 * \return      An ASN.1 error code if the input does not start with
 *              a valid ASN.1 INTEGER.
 * \return      #MBEDTLS_ERR_ASN1_INVALID_LENGTH if the parsed value does
 *              not fit in an \c int.
 * \return      An MPI error code if the parsed value is too large.
 */
int mbedtls_asn1_get_mpi( unsigned char **p,
                          const unsigned char *end,
                          mbedtls_mpi *X );
#endif /* MBEDTLS_BIGNUM_C */

/**
 * \brief       Retrieve an AlgorithmIdentifier ASN.1 sequence.
 *              Updates the pointer to immediately behind the full
 *              AlgorithmIdentifier.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p points to the first byte
 *              beyond the AlgorithmIdentifier element.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param alg   The buffer to receive the OID.
 * \param params The buffer to receive the parameters.
 *              This is zeroized if there are no parameters.
 *
 * \return      0 if successful or a specific ASN.1 or MPI error code.
 */
int mbedtls_asn1_get_alg( unsigned char **p,
                  const unsigned char *end,
                  mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params );

/**
 * \brief       Retrieve an AlgorithmIdentifier ASN.1 sequence with NULL or no
 *              params.
 *              Updates the pointer to immediately behind the full
 *              AlgorithmIdentifier.
 *
 * \param p     On entry, \c *p points to the start of the ASN.1 element.
 *              On successful completion, \c *p points to the first byte
 *              beyond the AlgorithmIdentifier element.
 *              On error, the value of \c *p is undefined.
 * \param end   End of data.
 * \param alg   The buffer to receive the OID.
 *
 * \return      0 if successful or a specific ASN.1 or MPI error code.
 */
int mbedtls_asn1_get_alg_null( unsigned char **p,
                       const unsigned char *end,
                       mbedtls_asn1_buf *alg );

/**
 * \brief       Find a specific named_data entry in a sequence or list based on
 *              the OID.
 *
 * \param list  The list to seek through
 * \param oid   The OID to look for
 * \param len   Size of the OID
 *
 * \return      NULL if not found, or a pointer to the existing entry.
 */
mbedtls_asn1_named_data *mbedtls_asn1_find_named_data( mbedtls_asn1_named_data *list,
                                       const char *oid, size_t len );

/**
 * \brief       Free a mbedtls_asn1_named_data entry
 *
 * \param entry The named data entry to free.
 *              This function calls mbedtls_free() on
 *              `entry->oid.p` and `entry->val.p`.
 */
void mbedtls_asn1_free_named_data( mbedtls_asn1_named_data *entry );

/**
 * \brief       Free all entries in a mbedtls_asn1_named_data list.
 *
 * \param head  Pointer to the head of the list of named data entries to free.
 *              This function calls mbedtls_asn1_free_named_data() and
 *              mbedtls_free() on each list element and
 *              sets \c *head to \c NULL.
 */
void mbedtls_asn1_free_named_data_list( mbedtls_asn1_named_data **head );

#ifdef __cplusplus
}
#endif

#endif /* asn1.h */


/********* Start of file include/mbedtls/ecp.h ************/

/**
 * \file ecp.h
 *
 * \brief This file provides an API for Elliptic Curves over GF(P) (ECP).
 *
 * The use of ECP in cryptography and TLS is defined in
 * <em>Standards for Efficient Cryptography Group (SECG): SEC1
 * Elliptic Curve Cryptography</em> and
 * <em>RFC-4492: Elliptic Curve Cryptography (ECC) Cipher Suites
 * for Transport Layer Security (TLS)</em>.
 *
 * <em>RFC-2409: The Internet Key Exchange (IKE)</em> defines ECP
 * group types.
 *
 */

/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_ECP_H
#define MBEDTLS_ECP_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



/*
 * ECP error codes
 */
/** Bad input parameters to function. */
#define MBEDTLS_ERR_ECP_BAD_INPUT_DATA                    -0x4F80
/** The buffer is too small to write to. */
#define MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL                  -0x4F00
/** The requested feature is not available, for example, the requested curve is not supported. */
#define MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE               -0x4E80
/** The signature is not valid. */
#define MBEDTLS_ERR_ECP_VERIFY_FAILED                     -0x4E00
/** Memory allocation failed. */
#define MBEDTLS_ERR_ECP_ALLOC_FAILED                      -0x4D80
/** Generation of random value, such as ephemeral key, failed. */
#define MBEDTLS_ERR_ECP_RANDOM_FAILED                     -0x4D00
/** Invalid private or public key. */
#define MBEDTLS_ERR_ECP_INVALID_KEY                       -0x4C80
/** The buffer contains a valid signature followed by more data. */
#define MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH                  -0x4C00

/* MBEDTLS_ERR_ECP_HW_ACCEL_FAILED is deprecated and should not be used. */
/** The ECP hardware accelerator failed. */
#define MBEDTLS_ERR_ECP_HW_ACCEL_FAILED                   -0x4B80

/** Operation in progress, call again with the same parameters to continue. */
#define MBEDTLS_ERR_ECP_IN_PROGRESS                       -0x4B00

/* Flags indicating whether to include code that is specific to certain
 * types of curves. These flags are for internal library use only. */
#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_BP256R1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_BP384R1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_BP512R1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED) || \
    defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
#define MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED
#endif
#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED) || \
    defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
#define MBEDTLS_ECP_MONTGOMERY_ENABLED
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Domain-parameter identifiers: curve, subgroup, and generator.
 *
 * \note Only curves over prime fields are supported.
 *
 * \warning This library does not support validation of arbitrary domain
 * parameters. Therefore, only standardized domain parameters from trusted
 * sources should be used. See mbedtls_ecp_group_load().
 */
/* Note: when adding a new curve:
 * - Add it at the end of this enum, otherwise you'll break the ABI by
 *   changing the numerical value for existing curves.
 * - Increment MBEDTLS_ECP_DP_MAX below if needed.
 * - Update the calculation of MBEDTLS_ECP_MAX_BITS_MIN below.
 * - Add the corresponding MBEDTLS_ECP_DP_xxx_ENABLED macro definition to
 *   config.h.
 * - List the curve as a dependency of MBEDTLS_ECP_C and
 *   MBEDTLS_ECDSA_C if supported in check_config.h.
 * - Add the curve to the appropriate curve type macro
 *   MBEDTLS_ECP_yyy_ENABLED above.
 * - Add the necessary definitions to ecp_curves.c.
 * - Add the curve to the ecp_supported_curves array in ecp.c.
 * - Add the curve to applicable profiles in x509_crt.c if applicable.
 */
typedef enum
{
    MBEDTLS_ECP_DP_NONE = 0,       /*!< Curve not defined. */
    MBEDTLS_ECP_DP_SECP192R1,      /*!< Domain parameters for the 192-bit curve defined by FIPS 186-4 and SEC1. */
    MBEDTLS_ECP_DP_SECP224R1,      /*!< Domain parameters for the 224-bit curve defined by FIPS 186-4 and SEC1. */
    MBEDTLS_ECP_DP_SECP256R1,      /*!< Domain parameters for the 256-bit curve defined by FIPS 186-4 and SEC1. */
    MBEDTLS_ECP_DP_SECP384R1,      /*!< Domain parameters for the 384-bit curve defined by FIPS 186-4 and SEC1. */
    MBEDTLS_ECP_DP_SECP521R1,      /*!< Domain parameters for the 521-bit curve defined by FIPS 186-4 and SEC1. */
    MBEDTLS_ECP_DP_BP256R1,        /*!< Domain parameters for 256-bit Brainpool curve. */
    MBEDTLS_ECP_DP_BP384R1,        /*!< Domain parameters for 384-bit Brainpool curve. */
    MBEDTLS_ECP_DP_BP512R1,        /*!< Domain parameters for 512-bit Brainpool curve. */
    MBEDTLS_ECP_DP_CURVE25519,     /*!< Domain parameters for Curve25519. */
    MBEDTLS_ECP_DP_SECP192K1,      /*!< Domain parameters for 192-bit "Koblitz" curve. */
    MBEDTLS_ECP_DP_SECP224K1,      /*!< Domain parameters for 224-bit "Koblitz" curve. */
    MBEDTLS_ECP_DP_SECP256K1,      /*!< Domain parameters for 256-bit "Koblitz" curve. */
    MBEDTLS_ECP_DP_CURVE448,       /*!< Domain parameters for Curve448. */
} mbedtls_ecp_group_id;

/**
 * The number of supported curves, plus one for #MBEDTLS_ECP_DP_NONE.
 *
 * \note Montgomery curves are currently excluded.
 */
#define MBEDTLS_ECP_DP_MAX     12

/*
 * Curve types
 */
typedef enum
{
    MBEDTLS_ECP_TYPE_NONE = 0,
    MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS,    /* y^2 = x^3 + a x + b      */
    MBEDTLS_ECP_TYPE_MONTGOMERY,           /* y^2 = x^3 + a x^2 + x    */
} mbedtls_ecp_curve_type;

/**
 * Curve information, for use by other modules.
 */
typedef struct mbedtls_ecp_curve_info
{
    mbedtls_ecp_group_id grp_id;    /*!< An internal identifier. */
    uint16_t tls_id;                /*!< The TLS NamedCurve identifier. */
    uint16_t bit_size;              /*!< The curve size in bits. */
    const char *name;               /*!< A human-friendly name. */
} mbedtls_ecp_curve_info;

/**
 * \brief           The ECP point structure, in Jacobian coordinates.
 *
 * \note            All functions expect and return points satisfying
 *                  the following condition: <code>Z == 0</code> or
 *                  <code>Z == 1</code>. Other values of \p Z are
 *                  used only by internal functions.
 *                  The point is zero, or "at infinity", if <code>Z == 0</code>.
 *                  Otherwise, \p X and \p Y are its standard (affine)
 *                  coordinates.
 */
typedef struct mbedtls_ecp_point
{
    mbedtls_mpi X;          /*!< The X coordinate of the ECP point. */
    mbedtls_mpi Y;          /*!< The Y coordinate of the ECP point. */
    mbedtls_mpi Z;          /*!< The Z coordinate of the ECP point. */
}
mbedtls_ecp_point;

/* Determine the minimum safe value of MBEDTLS_ECP_MAX_BITS. */
#if !defined(MBEDTLS_ECP_C)
#define MBEDTLS_ECP_MAX_BITS_MIN 0
/* Note: the curves must be listed in DECREASING size! */
#elif defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 521
#elif defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 512
#elif defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 448
#elif defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 384
#elif defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 384
#elif defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 256
#elif defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 256
#elif defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 256
#elif defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 255
#elif defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 225 // n is slightly above 2^224
#elif defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 224
#elif defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 192
#elif defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
#define MBEDTLS_ECP_MAX_BITS_MIN 192
#else
#error "MBEDTLS_ECP_C enabled, but no curve?"
#endif

#if !defined(MBEDTLS_ECP_ALT)
/*
 * default mbed TLS elliptic curve arithmetic implementation
 *
 * (in case MBEDTLS_ECP_ALT is defined then the developer has to provide an
 * alternative implementation for the whole module and it will replace this
 * one.)
 */

/**
 * \brief           The ECP group structure.
 *
 * We consider two types of curve equations:
 * <ul><li>Short Weierstrass: <code>y^2 = x^3 + A x + B mod P</code>
 * (SEC1 + RFC-4492)</li>
 * <li>Montgomery: <code>y^2 = x^3 + A x^2 + x mod P</code> (Curve25519,
 * Curve448)</li></ul>
 * In both cases, the generator (\p G) for a prime-order subgroup is fixed.
 *
 * For Short Weierstrass, this subgroup is the whole curve, and its
 * cardinality is denoted by \p N. Our code requires that \p N is an
 * odd prime as mbedtls_ecp_mul() requires an odd number, and
 * mbedtls_ecdsa_sign() requires that it is prime for blinding purposes.
 *
 * For Montgomery curves, we do not store \p A, but <code>(A + 2) / 4</code>,
 * which is the quantity used in the formulas. Additionally, \p nbits is
 * not the size of \p N but the required size for private keys.
 *
 * If \p modp is NULL, reduction modulo \p P is done using a generic algorithm.
 * Otherwise, \p modp must point to a function that takes an \p mbedtls_mpi in the
 * range of <code>0..2^(2*pbits)-1</code>, and transforms it in-place to an integer
 * which is congruent mod \p P to the given MPI, and is close enough to \p pbits
 * in size, so that it may be efficiently brought in the 0..P-1 range by a few
 * additions or subtractions. Therefore, it is only an approximative modular
 * reduction. It must return 0 on success and non-zero on failure.
 *
 * \note        Alternative implementations must keep the group IDs distinct. If
 *              two group structures have the same ID, then they must be
 *              identical.
 *
 */
typedef struct mbedtls_ecp_group
{
    mbedtls_ecp_group_id id;    /*!< An internal group identifier. */
    mbedtls_mpi P;              /*!< The prime modulus of the base field. */
    mbedtls_mpi A;              /*!< For Short Weierstrass: \p A in the equation. For
                                     Montgomery curves: <code>(A + 2) / 4</code>. */
    mbedtls_mpi B;              /*!< For Short Weierstrass: \p B in the equation.
                                     For Montgomery curves: unused. */
    mbedtls_ecp_point G;        /*!< The generator of the subgroup used. */
    mbedtls_mpi N;              /*!< The order of \p G. */
    size_t pbits;               /*!< The number of bits in \p P.*/
    size_t nbits;               /*!< For Short Weierstrass: The number of bits in \p P.
                                     For Montgomery curves: the number of bits in the
                                     private keys. */
    unsigned int h;             /*!< \internal 1 if the constants are static. */
    int (*modp)(mbedtls_mpi *); /*!< The function for fast pseudo-reduction
                                     mod \p P (see above).*/
    int (*t_pre)(mbedtls_ecp_point *, void *);  /*!< Unused. */
    int (*t_post)(mbedtls_ecp_point *, void *); /*!< Unused. */
    void *t_data;               /*!< Unused. */
    mbedtls_ecp_point *T;       /*!< Pre-computed points for ecp_mul_comb(). */
    size_t T_size;              /*!< The number of pre-computed points. */
}
mbedtls_ecp_group;

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h, or define them using the compiler command line.
 * \{
 */

#if defined(MBEDTLS_ECP_MAX_BITS)

#if MBEDTLS_ECP_MAX_BITS < MBEDTLS_ECP_MAX_BITS_MIN
#error "MBEDTLS_ECP_MAX_BITS is smaller than the largest supported curve"
#endif

#elif defined(MBEDTLS_ECP_C)
/**
 * The maximum size of the groups, that is, of \c N and \c P.
 */
#define MBEDTLS_ECP_MAX_BITS     MBEDTLS_ECP_MAX_BITS_MIN

#else
/* MBEDTLS_ECP_MAX_BITS is not relevant without MBEDTLS_ECP_C, but set it
 * to a nonzero value so that code that unconditionally allocates an array
 * of a size based on it keeps working if built without ECC support. */
#define MBEDTLS_ECP_MAX_BITS 1
#endif

#define MBEDTLS_ECP_MAX_BYTES    ( ( MBEDTLS_ECP_MAX_BITS + 7 ) / 8 )
#define MBEDTLS_ECP_MAX_PT_LEN   ( 2 * MBEDTLS_ECP_MAX_BYTES + 1 )

#if !defined(MBEDTLS_ECP_WINDOW_SIZE)
/*
 * Maximum "window" size used for point multiplication.
 * Default: a point where higher memory usage yields disminishing performance
 *          returns.
 * Minimum value: 2. Maximum value: 7.
 *
 * Result is an array of at most ( 1 << ( MBEDTLS_ECP_WINDOW_SIZE - 1 ) )
 * points used for point multiplication. This value is directly tied to EC
 * peak memory usage, so decreasing it by one should roughly cut memory usage
 * by two (if large curves are in use).
 *
 * Reduction in size may reduce speed, but larger curves are impacted first.
 * Sample performances (in ECDHE handshakes/s, with FIXED_POINT_OPTIM = 1):
 *      w-size:     6       5       4       3       2
 *      521       145     141     135     120      97
 *      384       214     209     198     177     146
 *      256       320     320     303     262     226
 *      224       475     475     453     398     342
 *      192       640     640     633     587     476
 */
#define MBEDTLS_ECP_WINDOW_SIZE    4   /**< The maximum window size used. */
#endif /* MBEDTLS_ECP_WINDOW_SIZE */

#if !defined(MBEDTLS_ECP_FIXED_POINT_OPTIM)
/*
 * Trade memory for speed on fixed-point multiplication.
 *
 * This speeds up repeated multiplication of the generator (that is, the
 * multiplication in ECDSA signatures, and half of the multiplications in
 * ECDSA verification and ECDHE) by a factor roughly 3 to 4.
 *
 * The cost is increasing EC peak memory usage by a factor roughly 2.
 *
 * Change this value to 0 to reduce peak memory usage.
 */
#define MBEDTLS_ECP_FIXED_POINT_OPTIM  1   /**< Enable fixed-point speed-up. */
#endif /* MBEDTLS_ECP_FIXED_POINT_OPTIM */

/* \} name SECTION: Module settings */

#else  /* MBEDTLS_ECP_ALT */

#endif /* MBEDTLS_ECP_ALT */

#if defined(MBEDTLS_ECP_RESTARTABLE)

/**
 * \brief           Internal restart context for multiplication
 *
 * \note            Opaque struct
 */
typedef struct mbedtls_ecp_restart_mul mbedtls_ecp_restart_mul_ctx;

/**
 * \brief           Internal restart context for ecp_muladd()
 *
 * \note            Opaque struct
 */
typedef struct mbedtls_ecp_restart_muladd mbedtls_ecp_restart_muladd_ctx;

/**
 * \brief           General context for resuming ECC operations
 */
typedef struct
{
    unsigned ops_done;                  /*!<  current ops count             */
    unsigned depth;                     /*!<  call depth (0 = top-level)    */
    mbedtls_ecp_restart_mul_ctx *rsm;   /*!<  ecp_mul_comb() sub-context    */
    mbedtls_ecp_restart_muladd_ctx *ma; /*!<  ecp_muladd() sub-context      */
} mbedtls_ecp_restart_ctx;

/*
 * Operation counts for restartable functions
 */
#define MBEDTLS_ECP_OPS_CHK   3 /*!< basic ops count for ecp_check_pubkey()  */
#define MBEDTLS_ECP_OPS_DBL   8 /*!< basic ops count for ecp_double_jac()    */
#define MBEDTLS_ECP_OPS_ADD  11 /*!< basic ops count for see ecp_add_mixed() */
#define MBEDTLS_ECP_OPS_INV 120 /*!< empirical equivalent for mpi_mod_inv()  */

/**
 * \brief           Internal; for restartable functions in other modules.
 *                  Check and update basic ops budget.
 *
 * \param grp       Group structure
 * \param rs_ctx    Restart context
 * \param ops       Number of basic ops to do
 *
 * \return          \c 0 if doing \p ops basic ops is still allowed,
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS otherwise.
 */
int mbedtls_ecp_check_budget( const mbedtls_ecp_group *grp,
                              mbedtls_ecp_restart_ctx *rs_ctx,
                              unsigned ops );

/* Utility macro for checking and updating ops budget */
#define MBEDTLS_ECP_BUDGET( ops )   \
    MBEDTLS_MPI_CHK( mbedtls_ecp_check_budget( grp, rs_ctx, \
                                               (unsigned) (ops) ) );

#else /* MBEDTLS_ECP_RESTARTABLE */

#define MBEDTLS_ECP_BUDGET( ops )   /* no-op; for compatibility */

/* We want to declare restartable versions of existing functions anyway */
typedef void mbedtls_ecp_restart_ctx;

#endif /* MBEDTLS_ECP_RESTARTABLE */

/**
 * \brief    The ECP key-pair structure.
 *
 * A generic key-pair that may be used for ECDSA and fixed ECDH, for example.
 *
 * \note    Members are deliberately in the same order as in the
 *          ::mbedtls_ecdsa_context structure.
 */
typedef struct mbedtls_ecp_keypair
{
    mbedtls_ecp_group grp;      /*!<  Elliptic curve and base point     */
    mbedtls_mpi d;              /*!<  our secret value                  */
    mbedtls_ecp_point Q;        /*!<  our public value                  */
}
mbedtls_ecp_keypair;

/*
 * Point formats, from RFC 4492's enum ECPointFormat
 */
#define MBEDTLS_ECP_PF_UNCOMPRESSED    0   /**< Uncompressed point format. */
#define MBEDTLS_ECP_PF_COMPRESSED      1   /**< Compressed point format. */

/*
 * Some other constants from RFC 4492
 */
#define MBEDTLS_ECP_TLS_NAMED_CURVE    3   /**< The named_curve of ECCurveType. */

#if defined(MBEDTLS_ECP_RESTARTABLE)
/**
 * \brief           Set the maximum number of basic operations done in a row.
 *
 *                  If more operations are needed to complete a computation,
 *                  #MBEDTLS_ERR_ECP_IN_PROGRESS will be returned by the
 *                  function performing the computation. It is then the
 *                  caller's responsibility to either call again with the same
 *                  parameters until it returns 0 or an error code; or to free
 *                  the restart context if the operation is to be aborted.
 *
 *                  It is strictly required that all input parameters and the
 *                  restart context be the same on successive calls for the
 *                  same operation, but output parameters need not be the
 *                  same; they must not be used until the function finally
 *                  returns 0.
 *
 *                  This only applies to functions whose documentation
 *                  mentions they may return #MBEDTLS_ERR_ECP_IN_PROGRESS (or
 *                  #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS for functions in the
 *                  SSL module). For functions that accept a "restart context"
 *                  argument, passing NULL disables restart and makes the
 *                  function equivalent to the function with the same name
 *                  with \c _restartable removed. For functions in the ECDH
 *                  module, restart is disabled unless the function accepts
 *                  an "ECDH context" argument and
 *                  mbedtls_ecdh_enable_restart() was previously called on
 *                  that context. For function in the SSL module, restart is
 *                  only enabled for specific sides and key exchanges
 *                  (currently only for clients and ECDHE-ECDSA).
 *
 * \param max_ops   Maximum number of basic operations done in a row.
 *                  Default: 0 (unlimited).
 *                  Lower (non-zero) values mean ECC functions will block for
 *                  a lesser maximum amount of time.
 *
 * \note            A "basic operation" is defined as a rough equivalent of a
 *                  multiplication in GF(p) for the NIST P-256 curve.
 *                  As an indication, with default settings, a scalar
 *                  multiplication (full run of \c mbedtls_ecp_mul()) is:
 *                  - about 3300 basic operations for P-256
 *                  - about 9400 basic operations for P-384
 *
 * \note            Very low values are not always respected: sometimes
 *                  functions need to block for a minimum number of
 *                  operations, and will do so even if max_ops is set to a
 *                  lower value.  That minimum depends on the curve size, and
 *                  can be made lower by decreasing the value of
 *                  \c MBEDTLS_ECP_WINDOW_SIZE.  As an indication, here is the
 *                  lowest effective value for various curves and values of
 *                  that parameter (w for short):
 *                          w=6     w=5     w=4     w=3     w=2
 *                  P-256   208     208     160     136     124
 *                  P-384   682     416     320     272     248
 *                  P-521  1364     832     640     544     496
 *
 * \note            This setting is currently ignored by Curve25519.
 */
void mbedtls_ecp_set_max_ops( unsigned max_ops );

/**
 * \brief           Check if restart is enabled (max_ops != 0)
 *
 * \return          \c 0 if \c max_ops == 0 (restart disabled)
 * \return          \c 1 otherwise (restart enabled)
 */
int mbedtls_ecp_restart_is_enabled( void );
#endif /* MBEDTLS_ECP_RESTARTABLE */

/*
 * Get the type of a curve
 */
mbedtls_ecp_curve_type mbedtls_ecp_get_type( const mbedtls_ecp_group *grp );

/**
 * \brief           This function retrieves the information defined in
 *                  mbedtls_ecp_curve_info() for all supported curves.
 *
 * \note            This function returns information about all curves
 *                  supported by the library. Some curves may not be
 *                  supported for all algorithms. Call mbedtls_ecdh_can_do()
 *                  or mbedtls_ecdsa_can_do() to check if a curve is
 *                  supported for ECDH or ECDSA.
 *
 * \return          A statically allocated array. The last entry is 0.
 */
const mbedtls_ecp_curve_info *mbedtls_ecp_curve_list( void );

/**
 * \brief           This function retrieves the list of internal group
 *                  identifiers of all supported curves in the order of
 *                  preference.
 *
 * \note            This function returns information about all curves
 *                  supported by the library. Some curves may not be
 *                  supported for all algorithms. Call mbedtls_ecdh_can_do()
 *                  or mbedtls_ecdsa_can_do() to check if a curve is
 *                  supported for ECDH or ECDSA.
 *
 * \return          A statically allocated array,
 *                  terminated with MBEDTLS_ECP_DP_NONE.
 */
const mbedtls_ecp_group_id *mbedtls_ecp_grp_id_list( void );

/**
 * \brief           This function retrieves curve information from an internal
 *                  group identifier.
 *
 * \param grp_id    An \c MBEDTLS_ECP_DP_XXX value.
 *
 * \return          The associated curve information on success.
 * \return          NULL on failure.
 */
const mbedtls_ecp_curve_info *mbedtls_ecp_curve_info_from_grp_id( mbedtls_ecp_group_id grp_id );

/**
 * \brief           This function retrieves curve information from a TLS
 *                  NamedCurve value.
 *
 * \param tls_id    An \c MBEDTLS_ECP_DP_XXX value.
 *
 * \return          The associated curve information on success.
 * \return          NULL on failure.
 */
const mbedtls_ecp_curve_info *mbedtls_ecp_curve_info_from_tls_id( uint16_t tls_id );

/**
 * \brief           This function retrieves curve information from a
 *                  human-readable name.
 *
 * \param name      The human-readable name.
 *
 * \return          The associated curve information on success.
 * \return          NULL on failure.
 */
const mbedtls_ecp_curve_info *mbedtls_ecp_curve_info_from_name( const char *name );

/**
 * \brief           This function initializes a point as zero.
 *
 * \param pt        The point to initialize.
 */
void mbedtls_ecp_point_init( mbedtls_ecp_point *pt );

/**
 * \brief           This function initializes an ECP group context
 *                  without loading any domain parameters.
 *
 * \note            After this function is called, domain parameters
 *                  for various ECP groups can be loaded through the
 *                  mbedtls_ecp_group_load() or mbedtls_ecp_tls_read_group()
 *                  functions.
 */
void mbedtls_ecp_group_init( mbedtls_ecp_group *grp );

/**
 * \brief           This function initializes a key pair as an invalid one.
 *
 * \param key       The key pair to initialize.
 */
void mbedtls_ecp_keypair_init( mbedtls_ecp_keypair *key );

/**
 * \brief           This function frees the components of a point.
 *
 * \param pt        The point to free.
 */
void mbedtls_ecp_point_free( mbedtls_ecp_point *pt );

/**
 * \brief           This function frees the components of an ECP group.
 *
 * \param grp       The group to free. This may be \c NULL, in which
 *                  case this function returns immediately. If it is not
 *                  \c NULL, it must point to an initialized ECP group.
 */
void mbedtls_ecp_group_free( mbedtls_ecp_group *grp );

/**
 * \brief           This function frees the components of a key pair.
 *
 * \param key       The key pair to free. This may be \c NULL, in which
 *                  case this function returns immediately. If it is not
 *                  \c NULL, it must point to an initialized ECP key pair.
 */
void mbedtls_ecp_keypair_free( mbedtls_ecp_keypair *key );

#if defined(MBEDTLS_ECP_RESTARTABLE)
/**
 * \brief           Initialize a restart context.
 *
 * \param ctx       The restart context to initialize. This must
 *                  not be \c NULL.
 */
void mbedtls_ecp_restart_init( mbedtls_ecp_restart_ctx *ctx );

/**
 * \brief           Free the components of a restart context.
 *
 * \param ctx       The restart context to free. This may be \c NULL, in which
 *                  case this function returns immediately. If it is not
 *                  \c NULL, it must point to an initialized restart context.
 */
void mbedtls_ecp_restart_free( mbedtls_ecp_restart_ctx *ctx );
#endif /* MBEDTLS_ECP_RESTARTABLE */

/**
 * \brief           This function copies the contents of point \p Q into
 *                  point \p P.
 *
 * \param P         The destination point. This must be initialized.
 * \param Q         The source point. This must be initialized.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure.
 * \return          Another negative error code for other kinds of failure.
 */
int mbedtls_ecp_copy( mbedtls_ecp_point *P, const mbedtls_ecp_point *Q );

/**
 * \brief           This function copies the contents of group \p src into
 *                  group \p dst.
 *
 * \param dst       The destination group. This must be initialized.
 * \param src       The source group. This must be initialized.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_group_copy( mbedtls_ecp_group *dst,
                            const mbedtls_ecp_group *src );

/**
 * \brief           This function sets a point to the point at infinity.
 *
 * \param pt        The point to set. This must be initialized.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_set_zero( mbedtls_ecp_point *pt );

/**
 * \brief           This function checks if a point is the point at infinity.
 *
 * \param pt        The point to test. This must be initialized.
 *
 * \return          \c 1 if the point is zero.
 * \return          \c 0 if the point is non-zero.
 * \return          A negative error code on failure.
 */
int mbedtls_ecp_is_zero( mbedtls_ecp_point *pt );

/**
 * \brief           This function compares two points.
 *
 * \note            This assumes that the points are normalized. Otherwise,
 *                  they may compare as "not equal" even if they are.
 *
 * \param P         The first point to compare. This must be initialized.
 * \param Q         The second point to compare. This must be initialized.
 *
 * \return          \c 0 if the points are equal.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if the points are not equal.
 */
int mbedtls_ecp_point_cmp( const mbedtls_ecp_point *P,
                           const mbedtls_ecp_point *Q );

/**
 * \brief           This function imports a non-zero point from two ASCII
 *                  strings.
 *
 * \param P         The destination point. This must be initialized.
 * \param radix     The numeric base of the input.
 * \param x         The first affine coordinate, as a null-terminated string.
 * \param y         The second affine coordinate, as a null-terminated string.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_MPI_XXX error code on failure.
 */
int mbedtls_ecp_point_read_string( mbedtls_ecp_point *P, int radix,
                           const char *x, const char *y );

/**
 * \brief           This function exports a point into unsigned binary data.
 *
 * \param grp       The group to which the point should belong.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param P         The point to export. This must be initialized.
 * \param format    The point format. This must be either
 *                  #MBEDTLS_ECP_PF_COMPRESSED or #MBEDTLS_ECP_PF_UNCOMPRESSED.
 *                  (For groups without these formats, this parameter is
 *                  ignored. But it still has to be either of the above
 *                  values.)
 * \param olen      The address at which to store the length of
 *                  the output in Bytes. This must not be \c NULL.
 * \param buf       The output buffer. This must be a writable buffer
 *                  of length \p buflen Bytes.
 * \param buflen    The length of the output buffer \p buf in Bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL if the output buffer
 *                  is too small to hold the point.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if the point format
 *                  or the export for the given group is not implemented.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_point_write_binary( const mbedtls_ecp_group *grp,
                                    const mbedtls_ecp_point *P,
                                    int format, size_t *olen,
                                    unsigned char *buf, size_t buflen );

/**
 * \brief           This function imports a point from unsigned binary data.
 *
 * \note            This function does not check that the point actually
 *                  belongs to the given group, see mbedtls_ecp_check_pubkey()
 *                  for that.
 *
 * \param grp       The group to which the point should belong.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param P         The destination context to import the point to.
 *                  This must be initialized.
 * \param buf       The input buffer. This must be a readable buffer
 *                  of length \p ilen Bytes.
 * \param ilen      The length of the input buffer \p buf in Bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if the input is invalid.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if the import for the
 *                  given group is not implemented.
 */
int mbedtls_ecp_point_read_binary( const mbedtls_ecp_group *grp,
                                   mbedtls_ecp_point *P,
                                   const unsigned char *buf, size_t ilen );

/**
 * \brief           This function imports a point from a TLS ECPoint record.
 *
 * \note            On function return, \p *buf is updated to point immediately
 *                  after the ECPoint record.
 *
 * \param grp       The ECP group to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param pt        The destination point.
 * \param buf       The address of the pointer to the start of the input buffer.
 * \param len       The length of the buffer.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_MPI_XXX error code on initialization
 *                  failure.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if input is invalid.
 */
int mbedtls_ecp_tls_read_point( const mbedtls_ecp_group *grp,
                                mbedtls_ecp_point *pt,
                                const unsigned char **buf, size_t len );

/**
 * \brief           This function exports a point as a TLS ECPoint record
 *                  defined in RFC 4492, Section 5.4.
 *
 * \param grp       The ECP group to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param pt        The point to be exported. This must be initialized.
 * \param format    The point format to use. This must be either
 *                  #MBEDTLS_ECP_PF_COMPRESSED or #MBEDTLS_ECP_PF_UNCOMPRESSED.
 * \param olen      The address at which to store the length in Bytes
 *                  of the data written.
 * \param buf       The target buffer. This must be a writable buffer of
 *                  length \p blen Bytes.
 * \param blen      The length of the target buffer \p buf in Bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if the input is invalid.
 * \return          #MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL if the target buffer
 *                  is too small to hold the exported point.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_tls_write_point( const mbedtls_ecp_group *grp,
                                 const mbedtls_ecp_point *pt,
                                 int format, size_t *olen,
                                 unsigned char *buf, size_t blen );

/**
 * \brief           This function sets up an ECP group context
 *                  from a standardized set of domain parameters.
 *
 * \note            The index should be a value of the NamedCurve enum,
 *                  as defined in <em>RFC-4492: Elliptic Curve Cryptography
 *                  (ECC) Cipher Suites for Transport Layer Security (TLS)</em>,
 *                  usually in the form of an \c MBEDTLS_ECP_DP_XXX macro.
 *
 * \param grp       The group context to setup. This must be initialized.
 * \param id        The identifier of the domain parameter set to load.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if \p id doesn't
 *                  correspond to a known group.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_group_load( mbedtls_ecp_group *grp, mbedtls_ecp_group_id id );

/**
 * \brief           This function sets up an ECP group context from a TLS
 *                  ECParameters record as defined in RFC 4492, Section 5.4.
 *
 * \note            The read pointer \p buf is updated to point right after
 *                  the ECParameters record on exit.
 *
 * \param grp       The group context to setup. This must be initialized.
 * \param buf       The address of the pointer to the start of the input buffer.
 * \param len       The length of the input buffer \c *buf in Bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if input is invalid.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if the group is not
 *                  recognized.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_tls_read_group( mbedtls_ecp_group *grp,
                                const unsigned char **buf, size_t len );

/**
 * \brief           This function extracts an elliptic curve group ID from a
 *                  TLS ECParameters record as defined in RFC 4492, Section 5.4.
 *
 * \note            The read pointer \p buf is updated to point right after
 *                  the ECParameters record on exit.
 *
 * \param grp       The address at which to store the group id.
 *                  This must not be \c NULL.
 * \param buf       The address of the pointer to the start of the input buffer.
 * \param len       The length of the input buffer \c *buf in Bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if input is invalid.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if the group is not
 *                  recognized.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_tls_read_group_id( mbedtls_ecp_group_id *grp,
                                   const unsigned char **buf,
                                   size_t len );
/**
 * \brief           This function exports an elliptic curve as a TLS
 *                  ECParameters record as defined in RFC 4492, Section 5.4.
 *
 * \param grp       The ECP group to be exported.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param olen      The address at which to store the number of Bytes written.
 *                  This must not be \c NULL.
 * \param buf       The buffer to write to. This must be a writable buffer
 *                  of length \p blen Bytes.
 * \param blen      The length of the output buffer \p buf in Bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL if the output
 *                  buffer is too small to hold the exported group.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_tls_write_group( const mbedtls_ecp_group *grp,
                                 size_t *olen,
                                 unsigned char *buf, size_t blen );

/**
 * \brief           This function performs a scalar multiplication of a point
 *                  by an integer: \p R = \p m * \p P.
 *
 *                  It is not thread-safe to use same group in multiple threads.
 *
 * \note            To prevent timing attacks, this function
 *                  executes the exact same sequence of base-field
 *                  operations for any valid \p m. It avoids any if-branch or
 *                  array index depending on the value of \p m.
 *
 * \note            If \p f_rng is not NULL, it is used to randomize
 *                  intermediate results to prevent potential timing attacks
 *                  targeting these results. We recommend always providing
 *                  a non-NULL \p f_rng. The overhead is negligible.
 *                  Note: unless #MBEDTLS_ECP_NO_INTERNAL_RNG is defined, when
 *                  \p f_rng is NULL, an internal RNG (seeded from the value
 *                  of \p m) will be used instead.
 *
 * \param grp       The ECP group to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param R         The point in which to store the result of the calculation.
 *                  This must be initialized.
 * \param m         The integer by which to multiply. This must be initialized.
 * \param P         The point to multiply. This must be initialized.
 * \param f_rng     The RNG function. This may be \c NULL if randomization
 *                  of intermediate results isn't desired (discouraged).
 * \param p_rng     The RNG context to be passed to \p p_rng.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_INVALID_KEY if \p m is not a valid private
 *                  key, or \p P is not a valid public key.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_mul( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
             const mbedtls_mpi *m, const mbedtls_ecp_point *P,
             int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );

/**
 * \brief           This function performs multiplication of a point by
 *                  an integer: \p R = \p m * \p P in a restartable way.
 *
 * \see             mbedtls_ecp_mul()
 *
 * \note            This function does the same as \c mbedtls_ecp_mul(), but
 *                  it can return early and restart according to the limit set
 *                  with \c mbedtls_ecp_set_max_ops() to reduce blocking.
 *
 * \param grp       The ECP group to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param R         The point in which to store the result of the calculation.
 *                  This must be initialized.
 * \param m         The integer by which to multiply. This must be initialized.
 * \param P         The point to multiply. This must be initialized.
 * \param f_rng     The RNG function. This may be \c NULL if randomization
 *                  of intermediate results isn't desired (discouraged).
 * \param p_rng     The RNG context to be passed to \p p_rng.
 * \param rs_ctx    The restart context (NULL disables restart).
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_INVALID_KEY if \p m is not a valid private
 *                  key, or \p P is not a valid public key.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure.
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_mul_restartable( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
             const mbedtls_mpi *m, const mbedtls_ecp_point *P,
             int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
             mbedtls_ecp_restart_ctx *rs_ctx );

#if defined(MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED)
/**
 * \brief           This function performs multiplication and addition of two
 *                  points by integers: \p R = \p m * \p P + \p n * \p Q
 *
 *                  It is not thread-safe to use same group in multiple threads.
 *
 * \note            In contrast to mbedtls_ecp_mul(), this function does not
 *                  guarantee a constant execution flow and timing.
 *
 * \note            This function is only defined for short Weierstrass curves.
 *                  It may not be included in builds without any short
 *                  Weierstrass curve.
 *
 * \param grp       The ECP group to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param R         The point in which to store the result of the calculation.
 *                  This must be initialized.
 * \param m         The integer by which to multiply \p P.
 *                  This must be initialized.
 * \param P         The point to multiply by \p m. This must be initialized.
 * \param n         The integer by which to multiply \p Q.
 *                  This must be initialized.
 * \param Q         The point to be multiplied by \p n.
 *                  This must be initialized.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_INVALID_KEY if \p m or \p n are not
 *                  valid private keys, or \p P or \p Q are not valid public
 *                  keys.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if \p grp does not
 *                  designate a short Weierstrass curve.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_muladd( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
             const mbedtls_mpi *m, const mbedtls_ecp_point *P,
             const mbedtls_mpi *n, const mbedtls_ecp_point *Q );

/**
 * \brief           This function performs multiplication and addition of two
 *                  points by integers: \p R = \p m * \p P + \p n * \p Q in a
 *                  restartable way.
 *
 * \see             \c mbedtls_ecp_muladd()
 *
 * \note            This function works the same as \c mbedtls_ecp_muladd(),
 *                  but it can return early and restart according to the limit
 *                  set with \c mbedtls_ecp_set_max_ops() to reduce blocking.
 *
 * \note            This function is only defined for short Weierstrass curves.
 *                  It may not be included in builds without any short
 *                  Weierstrass curve.
 *
 * \param grp       The ECP group to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param R         The point in which to store the result of the calculation.
 *                  This must be initialized.
 * \param m         The integer by which to multiply \p P.
 *                  This must be initialized.
 * \param P         The point to multiply by \p m. This must be initialized.
 * \param n         The integer by which to multiply \p Q.
 *                  This must be initialized.
 * \param Q         The point to be multiplied by \p n.
 *                  This must be initialized.
 * \param rs_ctx    The restart context (NULL disables restart).
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_INVALID_KEY if \p m or \p n are not
 *                  valid private keys, or \p P or \p Q are not valid public
 *                  keys.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if \p grp does not
 *                  designate a short Weierstrass curve.
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_muladd_restartable(
             mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
             const mbedtls_mpi *m, const mbedtls_ecp_point *P,
             const mbedtls_mpi *n, const mbedtls_ecp_point *Q,
             mbedtls_ecp_restart_ctx *rs_ctx );
#endif /* MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED */

/**
 * \brief           This function checks that a point is a valid public key
 *                  on this curve.
 *
 *                  It only checks that the point is non-zero, has
 *                  valid coordinates and lies on the curve. It does not verify
 *                  that it is indeed a multiple of \p G. This additional
 *                  check is computationally more expensive, is not required
 *                  by standards, and should not be necessary if the group
 *                  used has a small cofactor. In particular, it is useless for
 *                  the NIST groups which all have a cofactor of 1.
 *
 * \note            This function uses bare components rather than an
 *                  ::mbedtls_ecp_keypair structure, to ease use with other
 *                  structures, such as ::mbedtls_ecdh_context or
 *                  ::mbedtls_ecdsa_context.
 *
 * \param grp       The ECP group the point should belong to.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param pt        The point to check. This must be initialized.
 *
 * \return          \c 0 if the point is a valid public key.
 * \return          #MBEDTLS_ERR_ECP_INVALID_KEY if the point is not
 *                  a valid public key for the given curve.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_check_pubkey( const mbedtls_ecp_group *grp,
                              const mbedtls_ecp_point *pt );

/**
 * \brief           This function checks that an \p mbedtls_mpi is a
 *                  valid private key for this curve.
 *
 * \note            This function uses bare components rather than an
 *                  ::mbedtls_ecp_keypair structure to ease use with other
 *                  structures, such as ::mbedtls_ecdh_context or
 *                  ::mbedtls_ecdsa_context.
 *
 * \param grp       The ECP group the private key should belong to.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param d         The integer to check. This must be initialized.
 *
 * \return          \c 0 if the point is a valid private key.
 * \return          #MBEDTLS_ERR_ECP_INVALID_KEY if the point is not a valid
 *                  private key for the given curve.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_ecp_check_privkey( const mbedtls_ecp_group *grp,
                               const mbedtls_mpi *d );

/**
 * \brief           This function generates a private key.
 *
 * \param grp       The ECP group to generate a private key for.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param d         The destination MPI (secret part). This must be initialized.
 * \param f_rng     The RNG function. This must not be \c NULL.
 * \param p_rng     The RNG parameter to be passed to \p f_rng. This may be
 *                  \c NULL if \p f_rng doesn't need a context argument.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_MPI_XXX error code
 *                  on failure.
 */
int mbedtls_ecp_gen_privkey( const mbedtls_ecp_group *grp,
                     mbedtls_mpi *d,
                     int (*f_rng)(void *, unsigned char *, size_t),
                     void *p_rng );

/**
 * \brief           This function generates a keypair with a configurable base
 *                  point.
 *
 * \note            This function uses bare components rather than an
 *                  ::mbedtls_ecp_keypair structure to ease use with other
 *                  structures, such as ::mbedtls_ecdh_context or
 *                  ::mbedtls_ecdsa_context.
 *
 * \param grp       The ECP group to generate a key pair for.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param G         The base point to use. This must be initialized
 *                  and belong to \p grp. It replaces the default base
 *                  point \c grp->G used by mbedtls_ecp_gen_keypair().
 * \param d         The destination MPI (secret part).
 *                  This must be initialized.
 * \param Q         The destination point (public part).
 *                  This must be initialized.
 * \param f_rng     The RNG function. This must not be \c NULL.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may
 *                  be \c NULL if \p f_rng doesn't need a context argument.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_MPI_XXX error code
 *                  on failure.
 */
int mbedtls_ecp_gen_keypair_base( mbedtls_ecp_group *grp,
                                  const mbedtls_ecp_point *G,
                                  mbedtls_mpi *d, mbedtls_ecp_point *Q,
                                  int (*f_rng)(void *, unsigned char *, size_t),
                                  void *p_rng );

/**
 * \brief           This function generates an ECP keypair.
 *
 * \note            This function uses bare components rather than an
 *                  ::mbedtls_ecp_keypair structure to ease use with other
 *                  structures, such as ::mbedtls_ecdh_context or
 *                  ::mbedtls_ecdsa_context.
 *
 * \param grp       The ECP group to generate a key pair for.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param d         The destination MPI (secret part).
 *                  This must be initialized.
 * \param Q         The destination point (public part).
 *                  This must be initialized.
 * \param f_rng     The RNG function. This must not be \c NULL.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may
 *                  be \c NULL if \p f_rng doesn't need a context argument.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_MPI_XXX error code
 *                  on failure.
 */
int mbedtls_ecp_gen_keypair( mbedtls_ecp_group *grp, mbedtls_mpi *d,
                             mbedtls_ecp_point *Q,
                             int (*f_rng)(void *, unsigned char *, size_t),
                             void *p_rng );

/**
 * \brief           This function generates an ECP key.
 *
 * \param grp_id    The ECP group identifier.
 * \param key       The destination key. This must be initialized.
 * \param f_rng     The RNG function to use. This must not be \c NULL.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may
 *                  be \c NULL if \p f_rng doesn't need a context argument.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_MPI_XXX error code
 *                  on failure.
 */
int mbedtls_ecp_gen_key( mbedtls_ecp_group_id grp_id, mbedtls_ecp_keypair *key,
                         int (*f_rng)(void *, unsigned char *, size_t),
                         void *p_rng );

/**
 * \brief           This function reads an elliptic curve private key.
 *
 * \param grp_id    The ECP group identifier.
 * \param key       The destination key.
 * \param buf       The buffer containing the binary representation of the
 *                  key. (Big endian integer for Weierstrass curves, byte
 *                  string for Montgomery curves.)
 * \param buflen    The length of the buffer in bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_INVALID_KEY error if the key is
 *                  invalid.
 * \return          #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if the operation for
 *                  the group is not implemented.
 * \return          Another negative error code on different kinds of failure.
 */
int mbedtls_ecp_read_key( mbedtls_ecp_group_id grp_id, mbedtls_ecp_keypair *key,
                          const unsigned char *buf, size_t buflen );

/**
 * \brief           This function exports an elliptic curve private key.
 *
 * \param key       The private key.
 * \param buf       The output buffer for containing the binary representation
 *                  of the key. (Big endian integer for Weierstrass curves, byte
 *                  string for Montgomery curves.)
 * \param buflen    The total length of the buffer in bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL if the \p key
                    representation is larger than the available space in \p buf.
 * \return          #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if the operation for
 *                  the group is not implemented.
 * \return          Another negative error code on different kinds of failure.
 */
int mbedtls_ecp_write_key( mbedtls_ecp_keypair *key,
                           unsigned char *buf, size_t buflen );

/**
 * \brief           This function checks that the keypair objects
 *                  \p pub and \p prv have the same group and the
 *                  same public point, and that the private key in
 *                  \p prv is consistent with the public key.
 *
 * \param pub       The keypair structure holding the public key. This
 *                  must be initialized. If it contains a private key, that
 *                  part is ignored.
 * \param prv       The keypair structure holding the full keypair.
 *                  This must be initialized.
 *
 * \return          \c 0 on success, meaning that the keys are valid and match.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if the keys are invalid or do not match.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or an \c MBEDTLS_ERR_MPI_XXX
 *                  error code on calculation failure.
 */
int mbedtls_ecp_check_pub_priv( const mbedtls_ecp_keypair *pub,
                                const mbedtls_ecp_keypair *prv );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          The ECP checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
int mbedtls_ecp_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* ecp.h */


/********* Start of file include/mbedtls/ecdsa.h ************/

/**
 * \file ecdsa.h
 *
 * \brief This file contains ECDSA definitions and functions.
 *
 * The Elliptic Curve Digital Signature Algorithm (ECDSA) is defined in
 * <em>Standards for Efficient Cryptography Group (SECG):
 * SEC1 Elliptic Curve Cryptography</em>.
 * The use of ECDSA for TLS is defined in <em>RFC-4492: Elliptic Curve
 * Cryptography (ECC) Cipher Suites for Transport Layer Security (TLS)</em>.
 *
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_ECDSA_H
#define MBEDTLS_ECDSA_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif




/**
 * \brief           Maximum ECDSA signature size for a given curve bit size
 *
 * \param bits      Curve size in bits
 * \return          Maximum signature size in bytes
 *
 * \note            This macro returns a compile-time constant if its argument
 *                  is one. It may evaluate its argument multiple times.
 */
/*
 *     Ecdsa-Sig-Value ::= SEQUENCE {
 *         r       INTEGER,
 *         s       INTEGER
 *     }
 *
 * For each of r and s, the value (V) may include an extra initial "0" bit.
 */
#define MBEDTLS_ECDSA_MAX_SIG_LEN( bits )                               \
    ( /*T,L of SEQUENCE*/ ( ( bits ) >= 61 * 8 ? 3 : 2 ) +              \
      /*T,L of r,s*/        2 * ( ( ( bits ) >= 127 * 8 ? 3 : 2 ) +     \
      /*V of r,s*/                ( ( bits ) + 8 ) / 8 ) )

/** The maximal size of an ECDSA signature in Bytes. */
#define MBEDTLS_ECDSA_MAX_LEN  MBEDTLS_ECDSA_MAX_SIG_LEN( MBEDTLS_ECP_MAX_BITS )

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief           The ECDSA context structure.
 *
 * \warning         Performing multiple operations concurrently on the same
 *                  ECDSA context is not supported; objects of this type
 *                  should not be shared between multiple threads.
 */
typedef mbedtls_ecp_keypair mbedtls_ecdsa_context;

#if defined(MBEDTLS_ECP_RESTARTABLE)

/**
 * \brief           Internal restart context for ecdsa_verify()
 *
 * \note            Opaque struct, defined in ecdsa.c
 */
typedef struct mbedtls_ecdsa_restart_ver mbedtls_ecdsa_restart_ver_ctx;

/**
 * \brief           Internal restart context for ecdsa_sign()
 *
 * \note            Opaque struct, defined in ecdsa.c
 */
typedef struct mbedtls_ecdsa_restart_sig mbedtls_ecdsa_restart_sig_ctx;

#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
/**
 * \brief           Internal restart context for ecdsa_sign_det()
 *
 * \note            Opaque struct, defined in ecdsa.c
 */
typedef struct mbedtls_ecdsa_restart_det mbedtls_ecdsa_restart_det_ctx;
#endif

/**
 * \brief           General context for resuming ECDSA operations
 */
typedef struct
{
    mbedtls_ecp_restart_ctx ecp;        /*!<  base context for ECP restart and
                                              shared administrative info    */
    mbedtls_ecdsa_restart_ver_ctx *ver; /*!<  ecdsa_verify() sub-context    */
    mbedtls_ecdsa_restart_sig_ctx *sig; /*!<  ecdsa_sign() sub-context      */
#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
    mbedtls_ecdsa_restart_det_ctx *det; /*!<  ecdsa_sign_det() sub-context  */
#endif
} mbedtls_ecdsa_restart_ctx;

#else /* MBEDTLS_ECP_RESTARTABLE */

/* Now we can declare functions that take a pointer to that */
typedef void mbedtls_ecdsa_restart_ctx;

#endif /* MBEDTLS_ECP_RESTARTABLE */

/**
 * \brief          This function checks whether a given group can be used
 *                 for ECDSA.
 *
 * \param gid      The ECP group ID to check.
 *
 * \return         \c 1 if the group can be used, \c 0 otherwise
 */
int mbedtls_ecdsa_can_do( mbedtls_ecp_group_id gid );

/**
 * \brief           This function computes the ECDSA signature of a
 *                  previously-hashed message.
 *
 * \note            The deterministic version implemented in
 *                  mbedtls_ecdsa_sign_det() is usually preferred.
 *
 * \note            If the bitlength of the message hash is larger than the
 *                  bitlength of the group order, then the hash is truncated
 *                  as defined in <em>Standards for Efficient Cryptography Group
 *                  (SECG): SEC1 Elliptic Curve Cryptography</em>, section
 *                  4.1.3, step 5.
 *
 * \see             ecp.h
 *
 * \param grp       The context for the elliptic curve to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param r         The MPI context in which to store the first part
 *                  the signature. This must be initialized.
 * \param s         The MPI context in which to store the second part
 *                  the signature. This must be initialized.
 * \param d         The private signing key. This must be initialized.
 * \param buf       The content to be signed. This is usually the hash of
 *                  the original data to be signed. This must be a readable
 *                  buffer of length \p blen Bytes. It may be \c NULL if
 *                  \p blen is zero.
 * \param blen      The length of \p buf in Bytes.
 * \param f_rng     The RNG function. This must not be \c NULL.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may be
 *                  \c NULL if \p f_rng doesn't need a context parameter.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX
 *                  or \c MBEDTLS_MPI_XXX error code on failure.
 */
int mbedtls_ecdsa_sign( mbedtls_ecp_group *grp, mbedtls_mpi *r, mbedtls_mpi *s,
                const mbedtls_mpi *d, const unsigned char *buf, size_t blen,
                int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );

#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief           This function computes the ECDSA signature of a
 *                  previously-hashed message, deterministic version.
 *
 *                  For more information, see <em>RFC-6979: Deterministic
 *                  Usage of the Digital Signature Algorithm (DSA) and Elliptic
 *                  Curve Digital Signature Algorithm (ECDSA)</em>.
 *
 * \note            If the bitlength of the message hash is larger than the
 *                  bitlength of the group order, then the hash is truncated as
 *                  defined in <em>Standards for Efficient Cryptography Group
 *                  (SECG): SEC1 Elliptic Curve Cryptography</em>, section
 *                  4.1.3, step 5.
 *
 * \warning         Since the output of the internal RNG is always the same for
 *                  the same key and message, this limits the efficiency of
 *                  blinding and leaks information through side channels. For
 *                  secure behavior use mbedtls_ecdsa_sign_det_ext() instead.
 *
 *                  (Optimally the blinding is a random value that is different
 *                  on every execution. In this case the blinding is still
 *                  random from the attackers perspective, but is the same on
 *                  each execution. This means that this blinding does not
 *                  prevent attackers from recovering secrets by combining
 *                  several measurement traces, but may prevent some attacks
 *                  that exploit relationships between secret data.)
 *
 * \see             ecp.h
 *
 * \param grp       The context for the elliptic curve to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param r         The MPI context in which to store the first part
 *                  the signature. This must be initialized.
 * \param s         The MPI context in which to store the second part
 *                  the signature. This must be initialized.
 * \param d         The private signing key. This must be initialized
 *                  and setup, for example through mbedtls_ecp_gen_privkey().
 * \param buf       The hashed content to be signed. This must be a readable
 *                  buffer of length \p blen Bytes. It may be \c NULL if
 *                  \p blen is zero.
 * \param blen      The length of \p buf in Bytes.
 * \param md_alg    The hash algorithm used to hash the original data.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_MPI_XXX
 *                  error code on failure.
 */
int mbedtls_ecdsa_sign_det( mbedtls_ecp_group *grp, mbedtls_mpi *r,
                            mbedtls_mpi *s, const mbedtls_mpi *d,
                            const unsigned char *buf, size_t blen,
                            mbedtls_md_type_t md_alg ) MBEDTLS_DEPRECATED;
#undef MBEDTLS_DEPRECATED
#endif /* MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief           This function computes the ECDSA signature of a
 *                  previously-hashed message, deterministic version.
 *
 *                  For more information, see <em>RFC-6979: Deterministic
 *                  Usage of the Digital Signature Algorithm (DSA) and Elliptic
 *                  Curve Digital Signature Algorithm (ECDSA)</em>.
 *
 * \note            If the bitlength of the message hash is larger than the
 *                  bitlength of the group order, then the hash is truncated as
 *                  defined in <em>Standards for Efficient Cryptography Group
 *                  (SECG): SEC1 Elliptic Curve Cryptography</em>, section
 *                  4.1.3, step 5.
 *
 * \see             ecp.h
 *
 * \param grp           The context for the elliptic curve to use.
 *                      This must be initialized and have group parameters
 *                      set, for example through mbedtls_ecp_group_load().
 * \param r             The MPI context in which to store the first part
 *                      the signature. This must be initialized.
 * \param s             The MPI context in which to store the second part
 *                      the signature. This must be initialized.
 * \param d             The private signing key. This must be initialized
 *                      and setup, for example through mbedtls_ecp_gen_privkey().
 * \param buf           The hashed content to be signed. This must be a readable
 *                      buffer of length \p blen Bytes. It may be \c NULL if
 *                      \p blen is zero.
 * \param blen          The length of \p buf in Bytes.
 * \param md_alg        The hash algorithm used to hash the original data.
 * \param f_rng_blind   The RNG function used for blinding. This must not be
 *                      \c NULL.
 * \param p_rng_blind   The RNG context to be passed to \p f_rng. This may be
 *                      \c NULL if \p f_rng doesn't need a context parameter.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_MPI_XXX
 *                  error code on failure.
 */
int mbedtls_ecdsa_sign_det_ext( mbedtls_ecp_group *grp, mbedtls_mpi *r,
                            mbedtls_mpi *s, const mbedtls_mpi *d,
                            const unsigned char *buf, size_t blen,
                            mbedtls_md_type_t md_alg,
                            int (*f_rng_blind)(void *, unsigned char *, size_t),
                            void *p_rng_blind );
#endif /* MBEDTLS_ECDSA_DETERMINISTIC */

/**
 * \brief           This function verifies the ECDSA signature of a
 *                  previously-hashed message.
 *
 * \note            If the bitlength of the message hash is larger than the
 *                  bitlength of the group order, then the hash is truncated as
 *                  defined in <em>Standards for Efficient Cryptography Group
 *                  (SECG): SEC1 Elliptic Curve Cryptography</em>, section
 *                  4.1.4, step 3.
 *
 * \see             ecp.h
 *
 * \param grp       The ECP group to use.
 *                  This must be initialized and have group parameters
 *                  set, for example through mbedtls_ecp_group_load().
 * \param buf       The hashed content that was signed. This must be a readable
 *                  buffer of length \p blen Bytes. It may be \c NULL if
 *                  \p blen is zero.
 * \param blen      The length of \p buf in Bytes.
 * \param Q         The public key to use for verification. This must be
 *                  initialized and setup.
 * \param r         The first integer of the signature.
 *                  This must be initialized.
 * \param s         The second integer of the signature.
 *                  This must be initialized.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if the signature
 *                  is invalid.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_MPI_XXX
 *                  error code on failure for any other reason.
 */
int mbedtls_ecdsa_verify( mbedtls_ecp_group *grp,
                          const unsigned char *buf, size_t blen,
                          const mbedtls_ecp_point *Q, const mbedtls_mpi *r,
                          const mbedtls_mpi *s);

/**
 * \brief           This function computes the ECDSA signature and writes it
 *                  to a buffer, serialized as defined in <em>RFC-4492:
 *                  Elliptic Curve Cryptography (ECC) Cipher Suites for
 *                  Transport Layer Security (TLS)</em>.
 *
 * \warning         It is not thread-safe to use the same context in
 *                  multiple threads.
 *
 * \note            The deterministic version is used if
 *                  #MBEDTLS_ECDSA_DETERMINISTIC is defined. For more
 *                  information, see <em>RFC-6979: Deterministic Usage
 *                  of the Digital Signature Algorithm (DSA) and Elliptic
 *                  Curve Digital Signature Algorithm (ECDSA)</em>.
 *
 * \note            If the bitlength of the message hash is larger than the
 *                  bitlength of the group order, then the hash is truncated as
 *                  defined in <em>Standards for Efficient Cryptography Group
 *                  (SECG): SEC1 Elliptic Curve Cryptography</em>, section
 *                  4.1.3, step 5.
 *
 * \see             ecp.h
 *
 * \param ctx       The ECDSA context to use. This must be initialized
 *                  and have a group and private key bound to it, for example
 *                  via mbedtls_ecdsa_genkey() or mbedtls_ecdsa_from_keypair().
 * \param md_alg    The message digest that was used to hash the message.
 * \param hash      The message hash to be signed. This must be a readable
 *                  buffer of length \p blen Bytes.
 * \param hlen      The length of the hash \p hash in Bytes.
 * \param sig       The buffer to which to write the signature. This must be a
 *                  writable buffer of length at least twice as large as the
 *                  size of the curve used, plus 9. For example, 73 Bytes if
 *                  a 256-bit curve is used. A buffer length of
 *                  #MBEDTLS_ECDSA_MAX_LEN is always safe.
 * \param slen      The address at which to store the actual length of
 *                  the signature written. Must not be \c NULL.
 * \param f_rng     The RNG function. This must not be \c NULL if
 *                  #MBEDTLS_ECDSA_DETERMINISTIC is unset. Otherwise,
 *                  it is used only for blinding and may be set to \c NULL, but
 *                  doing so is DEPRECATED.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may be
 *                  \c NULL if \p f_rng is \c NULL or doesn't use a context.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX, \c MBEDTLS_ERR_MPI_XXX or
 *                  \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_ecdsa_write_signature( mbedtls_ecdsa_context *ctx,
                                   mbedtls_md_type_t md_alg,
                           const unsigned char *hash, size_t hlen,
                           unsigned char *sig, size_t *slen,
                           int (*f_rng)(void *, unsigned char *, size_t),
                           void *p_rng );

/**
 * \brief           This function computes the ECDSA signature and writes it
 *                  to a buffer, in a restartable way.
 *
 * \see             \c mbedtls_ecdsa_write_signature()
 *
 * \note            This function is like \c mbedtls_ecdsa_write_signature()
 *                  but it can return early and restart according to the limit
 *                  set with \c mbedtls_ecp_set_max_ops() to reduce blocking.
 *
 * \param ctx       The ECDSA context to use. This must be initialized
 *                  and have a group and private key bound to it, for example
 *                  via mbedtls_ecdsa_genkey() or mbedtls_ecdsa_from_keypair().
 * \param md_alg    The message digest that was used to hash the message.
 * \param hash      The message hash to be signed. This must be a readable
 *                  buffer of length \p blen Bytes.
 * \param hlen      The length of the hash \p hash in Bytes.
 * \param sig       The buffer to which to write the signature. This must be a
 *                  writable buffer of length at least twice as large as the
 *                  size of the curve used, plus 9. For example, 73 Bytes if
 *                  a 256-bit curve is used. A buffer length of
 *                  #MBEDTLS_ECDSA_MAX_LEN is always safe.
 * \param slen      The address at which to store the actual length of
 *                  the signature written. Must not be \c NULL.
 * \param f_rng     The RNG function. This must not be \c NULL if
 *                  #MBEDTLS_ECDSA_DETERMINISTIC is unset. Otherwise,
 *                  it is unused and may be set to \c NULL.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may be
 *                  \c NULL if \p f_rng is \c NULL or doesn't use a context.
 * \param rs_ctx    The restart context to use. This may be \c NULL to disable
 *                  restarting. If it is not \c NULL, it must point to an
 *                  initialized restart context.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 * \return          Another \c MBEDTLS_ERR_ECP_XXX, \c MBEDTLS_ERR_MPI_XXX or
 *                  \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_ecdsa_write_signature_restartable( mbedtls_ecdsa_context *ctx,
                           mbedtls_md_type_t md_alg,
                           const unsigned char *hash, size_t hlen,
                           unsigned char *sig, size_t *slen,
                           int (*f_rng)(void *, unsigned char *, size_t),
                           void *p_rng,
                           mbedtls_ecdsa_restart_ctx *rs_ctx );

#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief           This function computes an ECDSA signature and writes
 *                  it to a buffer, serialized as defined in <em>RFC-4492:
 *                  Elliptic Curve Cryptography (ECC) Cipher Suites for
 *                  Transport Layer Security (TLS)</em>.
 *
 *                  The deterministic version is defined in <em>RFC-6979:
 *                  Deterministic Usage of the Digital Signature Algorithm (DSA)
 *                  and Elliptic Curve Digital Signature Algorithm (ECDSA)</em>.
 *
 * \warning         It is not thread-safe to use the same context in
 *                  multiple threads.
 *
 * \note            If the bitlength of the message hash is larger than the
 *                  bitlength of the group order, then the hash is truncated as
 *                  defined in <em>Standards for Efficient Cryptography Group
 *                  (SECG): SEC1 Elliptic Curve Cryptography</em>, section
 *                  4.1.3, step 5.
 *
 * \see             ecp.h
 *
 * \deprecated      Superseded by mbedtls_ecdsa_write_signature() in
 *                  Mbed TLS version 2.0 and later.
 *
 * \param ctx       The ECDSA context to use. This must be initialized
 *                  and have a group and private key bound to it, for example
 *                  via mbedtls_ecdsa_genkey() or mbedtls_ecdsa_from_keypair().
 * \param hash      The message hash to be signed. This must be a readable
 *                  buffer of length \p blen Bytes.
 * \param hlen      The length of the hash \p hash in Bytes.
 * \param sig       The buffer to which to write the signature. This must be a
 *                  writable buffer of length at least twice as large as the
 *                  size of the curve used, plus 9. For example, 73 Bytes if
 *                  a 256-bit curve is used. A buffer length of
 *                  #MBEDTLS_ECDSA_MAX_LEN is always safe.
 * \param slen      The address at which to store the actual length of
 *                  the signature written. Must not be \c NULL.
 * \param md_alg    The message digest that was used to hash the message.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX, \c MBEDTLS_ERR_MPI_XXX or
 *                  \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_ecdsa_write_signature_det( mbedtls_ecdsa_context *ctx,
                               const unsigned char *hash, size_t hlen,
                               unsigned char *sig, size_t *slen,
                               mbedtls_md_type_t md_alg ) MBEDTLS_DEPRECATED;
#undef MBEDTLS_DEPRECATED
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_ECDSA_DETERMINISTIC */

/**
 * \brief           This function reads and verifies an ECDSA signature.
 *
 * \note            If the bitlength of the message hash is larger than the
 *                  bitlength of the group order, then the hash is truncated as
 *                  defined in <em>Standards for Efficient Cryptography Group
 *                  (SECG): SEC1 Elliptic Curve Cryptography</em>, section
 *                  4.1.4, step 3.
 *
 * \see             ecp.h
 *
 * \param ctx       The ECDSA context to use. This must be initialized
 *                  and have a group and public key bound to it.
 * \param hash      The message hash that was signed. This must be a readable
 *                  buffer of length \p size Bytes.
 * \param hlen      The size of the hash \p hash.
 * \param sig       The signature to read and verify. This must be a readable
 *                  buffer of length \p slen Bytes.
 * \param slen      The size of \p sig in Bytes.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if signature is invalid.
 * \return          #MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH if there is a valid
 *                  signature in \p sig, but its length is less than \p siglen.
 * \return          An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_ERR_MPI_XXX
 *                  error code on failure for any other reason.
 */
int mbedtls_ecdsa_read_signature( mbedtls_ecdsa_context *ctx,
                          const unsigned char *hash, size_t hlen,
                          const unsigned char *sig, size_t slen );

/**
 * \brief           This function reads and verifies an ECDSA signature,
 *                  in a restartable way.
 *
 * \see             \c mbedtls_ecdsa_read_signature()
 *
 * \note            This function is like \c mbedtls_ecdsa_read_signature()
 *                  but it can return early and restart according to the limit
 *                  set with \c mbedtls_ecp_set_max_ops() to reduce blocking.
 *
 * \param ctx       The ECDSA context to use. This must be initialized
 *                  and have a group and public key bound to it.
 * \param hash      The message hash that was signed. This must be a readable
 *                  buffer of length \p size Bytes.
 * \param hlen      The size of the hash \p hash.
 * \param sig       The signature to read and verify. This must be a readable
 *                  buffer of length \p slen Bytes.
 * \param slen      The size of \p sig in Bytes.
 * \param rs_ctx    The restart context to use. This may be \c NULL to disable
 *                  restarting. If it is not \c NULL, it must point to an
 *                  initialized restart context.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if signature is invalid.
 * \return          #MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH if there is a valid
 *                  signature in \p sig, but its length is less than \p siglen.
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 * \return          Another \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_ERR_MPI_XXX
 *                  error code on failure for any other reason.
 */
int mbedtls_ecdsa_read_signature_restartable( mbedtls_ecdsa_context *ctx,
                          const unsigned char *hash, size_t hlen,
                          const unsigned char *sig, size_t slen,
                          mbedtls_ecdsa_restart_ctx *rs_ctx );

/**
 * \brief          This function generates an ECDSA keypair on the given curve.
 *
 * \see            ecp.h
 *
 * \param ctx      The ECDSA context to store the keypair in.
 *                 This must be initialized.
 * \param gid      The elliptic curve to use. One of the various
 *                 \c MBEDTLS_ECP_DP_XXX macros depending on configuration.
 * \param f_rng    The RNG function to use. This must not be \c NULL.
 * \param p_rng    The RNG context to be passed to \p f_rng. This may be
 *                 \c NULL if \p f_rng doesn't need a context argument.
 *
 * \return         \c 0 on success.
 * \return         An \c MBEDTLS_ERR_ECP_XXX code on failure.
 */
int mbedtls_ecdsa_genkey( mbedtls_ecdsa_context *ctx, mbedtls_ecp_group_id gid,
                  int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );

/**
 * \brief           This function sets up an ECDSA context from an EC key pair.
 *
 * \see             ecp.h
 *
 * \param ctx       The ECDSA context to setup. This must be initialized.
 * \param key       The EC key to use. This must be initialized and hold
 *                  a private-public key pair or a public key. In the former
 *                  case, the ECDSA context may be used for signature creation
 *                  and verification after this call. In the latter case, it
 *                  may be used for signature verification.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX code on failure.
 */
int mbedtls_ecdsa_from_keypair( mbedtls_ecdsa_context *ctx,
                                const mbedtls_ecp_keypair *key );

/**
 * \brief           This function initializes an ECDSA context.
 *
 * \param ctx       The ECDSA context to initialize.
 *                  This must not be \c NULL.
 */
void mbedtls_ecdsa_init( mbedtls_ecdsa_context *ctx );

/**
 * \brief           This function frees an ECDSA context.
 *
 * \param ctx       The ECDSA context to free. This may be \c NULL,
 *                  in which case this function does nothing. If it
 *                  is not \c NULL, it must be initialized.
 */
void mbedtls_ecdsa_free( mbedtls_ecdsa_context *ctx );

#if defined(MBEDTLS_ECP_RESTARTABLE)
/**
 * \brief           Initialize a restart context.
 *
 * \param ctx       The restart context to initialize.
 *                  This must not be \c NULL.
 */
void mbedtls_ecdsa_restart_init( mbedtls_ecdsa_restart_ctx *ctx );

/**
 * \brief           Free the components of a restart context.
 *
 * \param ctx       The restart context to free. This may be \c NULL,
 *                  in which case this function does nothing. If it
 *                  is not \c NULL, it must be initialized.
 */
void mbedtls_ecdsa_restart_free( mbedtls_ecdsa_restart_ctx *ctx );
#endif /* MBEDTLS_ECP_RESTARTABLE */

#ifdef __cplusplus
}
#endif

#endif /* ecdsa.h */


/********* Start of file include/mbedtls/ecjpake.h ************/

/**
 * \file ecjpake.h
 *
 * \brief Elliptic curve J-PAKE
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_ECJPAKE_H
#define MBEDTLS_ECJPAKE_H

/*
 * J-PAKE is a password-authenticated key exchange that allows deriving a
 * strong shared secret from a (potentially low entropy) pre-shared
 * passphrase, with forward secrecy and mutual authentication.
 * https://en.wikipedia.org/wiki/Password_Authenticated_Key_Exchange_by_Juggling
 *
 * This file implements the Elliptic Curve variant of J-PAKE,
 * as defined in Chapter 7.4 of the Thread v1.0 Specification,
 * available to members of the Thread Group http://threadgroup.org/
 *
 * As the J-PAKE algorithm is inherently symmetric, so is our API.
 * Each party needs to send its first round message, in any order, to the
 * other party, then each sends its second round message, in any order.
 * The payloads are serialized in a way suitable for use in TLS, but could
 * also be use outside TLS.
 */
#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif




#ifdef __cplusplus
extern "C" {
#endif

/**
 * Roles in the EC J-PAKE exchange
 */
typedef enum {
    MBEDTLS_ECJPAKE_CLIENT = 0,         /**< Client                         */
    MBEDTLS_ECJPAKE_SERVER,             /**< Server                         */
} mbedtls_ecjpake_role;

#if !defined(MBEDTLS_ECJPAKE_ALT)
/**
 * EC J-PAKE context structure.
 *
 * J-PAKE is a symmetric protocol, except for the identifiers used in
 * Zero-Knowledge Proofs, and the serialization of the second message
 * (KeyExchange) as defined by the Thread spec.
 *
 * In order to benefit from this symmetry, we choose a different naming
 * convetion from the Thread v1.0 spec. Correspondance is indicated in the
 * description as a pair C: client name, S: server name
 */
typedef struct mbedtls_ecjpake_context
{
    const mbedtls_md_info_t *md_info;   /**< Hash to use                    */
    mbedtls_ecp_group grp;              /**< Elliptic curve                 */
    mbedtls_ecjpake_role role;          /**< Are we client or server?       */
    int point_format;                   /**< Format for point export        */

    mbedtls_ecp_point Xm1;              /**< My public key 1   C: X1, S: X3 */
    mbedtls_ecp_point Xm2;              /**< My public key 2   C: X2, S: X4 */
    mbedtls_ecp_point Xp1;              /**< Peer public key 1 C: X3, S: X1 */
    mbedtls_ecp_point Xp2;              /**< Peer public key 2 C: X4, S: X2 */
    mbedtls_ecp_point Xp;               /**< Peer public key   C: Xs, S: Xc */

    mbedtls_mpi xm1;                    /**< My private key 1  C: x1, S: x3 */
    mbedtls_mpi xm2;                    /**< My private key 2  C: x2, S: x4 */

    mbedtls_mpi s;                      /**< Pre-shared secret (passphrase) */
} mbedtls_ecjpake_context;

#else  /* MBEDTLS_ECJPAKE_ALT */

#endif /* MBEDTLS_ECJPAKE_ALT */

/**
 * \brief           Initialize an ECJPAKE context.
 *
 * \param ctx       The ECJPAKE context to initialize.
 *                  This must not be \c NULL.
 */
void mbedtls_ecjpake_init( mbedtls_ecjpake_context *ctx );

/**
 * \brief           Set up an ECJPAKE context for use.
 *
 * \note            Currently the only values for hash/curve allowed by the
 *                  standard are #MBEDTLS_MD_SHA256/#MBEDTLS_ECP_DP_SECP256R1.
 *
 * \param ctx       The ECJPAKE context to set up. This must be initialized.
 * \param role      The role of the caller. This must be either
 *                  #MBEDTLS_ECJPAKE_CLIENT or #MBEDTLS_ECJPAKE_SERVER.
 * \param hash      The identifier of the hash function to use,
 *                  for example #MBEDTLS_MD_SHA256.
 * \param curve     The identifier of the elliptic curve to use,
 *                  for example #MBEDTLS_ECP_DP_SECP256R1.
 * \param secret    The pre-shared secret (passphrase). This must be
 *                  a readable buffer of length \p len Bytes. It need
 *                  only be valid for the duration of this call.
 * \param len       The length of the pre-shared secret \p secret.
 *
 * \return          \c 0 if successful.
 * \return          A negative error code on failure.
 */
int mbedtls_ecjpake_setup( mbedtls_ecjpake_context *ctx,
                           mbedtls_ecjpake_role role,
                           mbedtls_md_type_t hash,
                           mbedtls_ecp_group_id curve,
                           const unsigned char *secret,
                           size_t len );

/**
 * \brief           Check if an ECJPAKE context is ready for use.
 *
 * \param ctx       The ECJPAKE context to check. This must be
 *                  initialized.
 *
 * \return          \c 0 if the context is ready for use.
 * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA otherwise.
 */
int mbedtls_ecjpake_check( const mbedtls_ecjpake_context *ctx );

/**
 * \brief           Generate and write the first round message
 *                  (TLS: contents of the Client/ServerHello extension,
 *                  excluding extension type and length bytes).
 *
 * \param ctx       The ECJPAKE context to use. This must be
 *                  initialized and set up.
 * \param buf       The buffer to write the contents to. This must be a
 *                  writable buffer of length \p len Bytes.
 * \param len       The length of \p buf in Bytes.
 * \param olen      The address at which to store the total number
 *                  of Bytes written to \p buf. This must not be \c NULL.
 * \param f_rng     The RNG function to use. This must not be \c NULL.
 * \param p_rng     The RNG parameter to be passed to \p f_rng. This
 *                  may be \c NULL if \p f_rng doesn't use a context.
 *
 * \return          \c 0 if successful.
 * \return          A negative error code on failure.
 */
int mbedtls_ecjpake_write_round_one( mbedtls_ecjpake_context *ctx,
                            unsigned char *buf, size_t len, size_t *olen,
                            int (*f_rng)(void *, unsigned char *, size_t),
                            void *p_rng );

/**
 * \brief           Read and process the first round message
 *                  (TLS: contents of the Client/ServerHello extension,
 *                  excluding extension type and length bytes).
 *
 * \param ctx       The ECJPAKE context to use. This must be initialized
 *                  and set up.
 * \param buf       The buffer holding the first round message. This must
 *                  be a readable buffer of length \p len Bytes.
 * \param len       The length in Bytes of \p buf.
 *
 * \return          \c 0 if successful.
 * \return          A negative error code on failure.
 */
int mbedtls_ecjpake_read_round_one( mbedtls_ecjpake_context *ctx,
                                    const unsigned char *buf,
                                    size_t len );

/**
 * \brief           Generate and write the second round message
 *                  (TLS: contents of the Client/ServerKeyExchange).
 *
 * \param ctx       The ECJPAKE context to use. This must be initialized,
 *                  set up, and already have performed round one.
 * \param buf       The buffer to write the round two contents to.
 *                  This must be a writable buffer of length \p len Bytes.
 * \param len       The size of \p buf in Bytes.
 * \param olen      The address at which to store the total number of Bytes
 *                  written to \p buf. This must not be \c NULL.
 * \param f_rng     The RNG function to use. This must not be \c NULL.
 * \param p_rng     The RNG parameter to be passed to \p f_rng. This
 *                  may be \c NULL if \p f_rng doesn't use a context.
 *
 * \return          \c 0 if successful.
 * \return          A negative error code on failure.
 */
int mbedtls_ecjpake_write_round_two( mbedtls_ecjpake_context *ctx,
                            unsigned char *buf, size_t len, size_t *olen,
                            int (*f_rng)(void *, unsigned char *, size_t),
                            void *p_rng );

/**
 * \brief           Read and process the second round message
 *                  (TLS: contents of the Client/ServerKeyExchange).
 *
 * \param ctx       The ECJPAKE context to use. This must be initialized
 *                  and set up and already have performed round one.
 * \param buf       The buffer holding the second round message. This must
 *                  be a readable buffer of length \p len Bytes.
 * \param len       The length in Bytes of \p buf.
 *
 * \return          \c 0 if successful.
 * \return          A negative error code on failure.
 */
int mbedtls_ecjpake_read_round_two( mbedtls_ecjpake_context *ctx,
                                    const unsigned char *buf,
                                    size_t len );

/**
 * \brief           Derive the shared secret
 *                  (TLS: Pre-Master Secret).
 *
 * \param ctx       The ECJPAKE context to use. This must be initialized,
 *                  set up and have performed both round one and two.
 * \param buf       The buffer to write the derived secret to. This must
 *                  be a writable buffer of length \p len Bytes.
 * \param len       The length of \p buf in Bytes.
 * \param olen      The address at which to store the total number of Bytes
 *                  written to \p buf. This must not be \c NULL.
 * \param f_rng     The RNG function to use. This must not be \c NULL.
 * \param p_rng     The RNG parameter to be passed to \p f_rng. This
 *                  may be \c NULL if \p f_rng doesn't use a context.
 *
 * \return          \c 0 if successful.
 * \return          A negative error code on failure.
 */
int mbedtls_ecjpake_derive_secret( mbedtls_ecjpake_context *ctx,
                            unsigned char *buf, size_t len, size_t *olen,
                            int (*f_rng)(void *, unsigned char *, size_t),
                            void *p_rng );

/**
 * \brief           This clears an ECJPAKE context and frees any
 *                  embedded data structure.
 *
 * \param ctx       The ECJPAKE context to free. This may be \c NULL,
 *                  in which case this function does nothing. If it is not
 *                  \c NULL, it must point to an initialized ECJPAKE context.
 */
void mbedtls_ecjpake_free( mbedtls_ecjpake_context *ctx );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if a test failed
 */
int mbedtls_ecjpake_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif


#endif /* ecjpake.h */


/********* Start of file include/mbedtls/pk.h ************/

/**
 * \file pk.h
 *
 * \brief Public Key abstraction layer
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_PK_H
#define MBEDTLS_PK_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#if defined(MBEDTLS_RSA_C)

#endif

#if defined(MBEDTLS_ECP_C)

#endif

#if defined(MBEDTLS_ECDSA_C)

#endif

#if defined(MBEDTLS_USE_PSA_CRYPTO)

#endif

#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
    !defined(inline) && !defined(__cplusplus)
#define inline __inline
#endif

/** Memory allocation failed. */
#define MBEDTLS_ERR_PK_ALLOC_FAILED        -0x3F80
/** Type mismatch, eg attempt to encrypt with an ECDSA key */
#define MBEDTLS_ERR_PK_TYPE_MISMATCH       -0x3F00
/** Bad input parameters to function. */
#define MBEDTLS_ERR_PK_BAD_INPUT_DATA      -0x3E80
/** Read/write of file failed. */
#define MBEDTLS_ERR_PK_FILE_IO_ERROR       -0x3E00
/** Unsupported key version */
#define MBEDTLS_ERR_PK_KEY_INVALID_VERSION -0x3D80
/** Invalid key tag or value. */
#define MBEDTLS_ERR_PK_KEY_INVALID_FORMAT  -0x3D00
/** Key algorithm is unsupported (only RSA and EC are supported). */
#define MBEDTLS_ERR_PK_UNKNOWN_PK_ALG      -0x3C80
/** Private key password can't be empty. */
#define MBEDTLS_ERR_PK_PASSWORD_REQUIRED   -0x3C00
/** Given private key password does not allow for correct decryption. */
#define MBEDTLS_ERR_PK_PASSWORD_MISMATCH   -0x3B80
/** The pubkey tag or value is invalid (only RSA and EC are supported). */
#define MBEDTLS_ERR_PK_INVALID_PUBKEY      -0x3B00
/** The algorithm tag or value is invalid. */
#define MBEDTLS_ERR_PK_INVALID_ALG         -0x3A80
/** Elliptic curve is unsupported (only NIST curves are supported). */
#define MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE -0x3A00
/** Unavailable feature, e.g. RSA disabled for RSA key. */
#define MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE -0x3980
/** The buffer contains a valid signature followed by more data. */
#define MBEDTLS_ERR_PK_SIG_LEN_MISMATCH    -0x3900

/* MBEDTLS_ERR_PK_HW_ACCEL_FAILED is deprecated and should not be used. */
/** PK hardware accelerator failed. */
#define MBEDTLS_ERR_PK_HW_ACCEL_FAILED     -0x3880

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief          Public key types
 */
typedef enum {
    MBEDTLS_PK_NONE=0,
    MBEDTLS_PK_RSA,
    MBEDTLS_PK_ECKEY,
    MBEDTLS_PK_ECKEY_DH,
    MBEDTLS_PK_ECDSA,
    MBEDTLS_PK_RSA_ALT,
    MBEDTLS_PK_RSASSA_PSS,
    MBEDTLS_PK_OPAQUE,
} mbedtls_pk_type_t;

/**
 * \brief           Options for RSASSA-PSS signature verification.
 *                  See \c mbedtls_rsa_rsassa_pss_verify_ext()
 */
typedef struct mbedtls_pk_rsassa_pss_options
{
    mbedtls_md_type_t mgf1_hash_id;
    int expected_salt_len;

} mbedtls_pk_rsassa_pss_options;

/**
 * \brief           Maximum size of a signature made by mbedtls_pk_sign().
 */
/* We need to set MBEDTLS_PK_SIGNATURE_MAX_SIZE to the maximum signature
 * size among the supported signature types. Do it by starting at 0,
 * then incrementally increasing to be large enough for each supported
 * signature mechanism.
 *
 * The resulting value can be 0, for example if MBEDTLS_ECDH_C is enabled
 * (which allows the pk module to be included) but neither MBEDTLS_ECDSA_C
 * nor MBEDTLS_RSA_C nor any opaque signature mechanism (PSA or RSA_ALT).
 */
#define MBEDTLS_PK_SIGNATURE_MAX_SIZE 0

#if ( defined(MBEDTLS_RSA_C) || defined(MBEDTLS_PK_RSA_ALT_SUPPORT) ) && \
    MBEDTLS_MPI_MAX_SIZE > MBEDTLS_PK_SIGNATURE_MAX_SIZE
/* For RSA, the signature can be as large as the bignum module allows.
 * For RSA_ALT, the signature size is not necessarily tied to what the
 * bignum module can do, but in the absence of any specific setting,
 * we use that (rsa_alt_sign_wrap in pk_wrap will check). */
#undef MBEDTLS_PK_SIGNATURE_MAX_SIZE
#define MBEDTLS_PK_SIGNATURE_MAX_SIZE MBEDTLS_MPI_MAX_SIZE
#endif

#if defined(MBEDTLS_ECDSA_C) &&                                 \
    MBEDTLS_ECDSA_MAX_LEN > MBEDTLS_PK_SIGNATURE_MAX_SIZE
/* For ECDSA, the ecdsa module exports a constant for the maximum
 * signature size. */
#undef MBEDTLS_PK_SIGNATURE_MAX_SIZE
#define MBEDTLS_PK_SIGNATURE_MAX_SIZE MBEDTLS_ECDSA_MAX_LEN
#endif

#if defined(MBEDTLS_USE_PSA_CRYPTO)
#if PSA_SIGNATURE_MAX_SIZE > MBEDTLS_PK_SIGNATURE_MAX_SIZE
/* PSA_SIGNATURE_MAX_SIZE is the maximum size of a signature made
 * through the PSA API in the PSA representation. */
#undef MBEDTLS_PK_SIGNATURE_MAX_SIZE
#define MBEDTLS_PK_SIGNATURE_MAX_SIZE PSA_SIGNATURE_MAX_SIZE
#endif

#if PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE + 11 > MBEDTLS_PK_SIGNATURE_MAX_SIZE
/* The Mbed TLS representation is different for ECDSA signatures:
 * PSA uses the raw concatenation of r and s,
 * whereas Mbed TLS uses the ASN.1 representation (SEQUENCE of two INTEGERs).
 * Add the overhead of ASN.1: up to (1+2) + 2 * (1+2+1) for the
 * types, lengths (represented by up to 2 bytes), and potential leading
 * zeros of the INTEGERs and the SEQUENCE. */
#undef MBEDTLS_PK_SIGNATURE_MAX_SIZE
#define MBEDTLS_PK_SIGNATURE_MAX_SIZE ( PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE + 11 )
#endif
#endif /* defined(MBEDTLS_USE_PSA_CRYPTO) */

/**
 * \brief           Types for interfacing with the debug module
 */
typedef enum
{
    MBEDTLS_PK_DEBUG_NONE = 0,
    MBEDTLS_PK_DEBUG_MPI,
    MBEDTLS_PK_DEBUG_ECP,
} mbedtls_pk_debug_type;

/**
 * \brief           Item to send to the debug module
 */
typedef struct mbedtls_pk_debug_item
{
    mbedtls_pk_debug_type type;
    const char *name;
    void *value;
} mbedtls_pk_debug_item;

/** Maximum number of item send for debugging, plus 1 */
#define MBEDTLS_PK_DEBUG_MAX_ITEMS 3

/**
 * \brief           Public key information and operations
 */
typedef struct mbedtls_pk_info_t mbedtls_pk_info_t;

/**
 * \brief           Public key container
 */
typedef struct mbedtls_pk_context
{
    const mbedtls_pk_info_t *   pk_info; /**< Public key information         */
    void *                      pk_ctx;  /**< Underlying public key context  */
} mbedtls_pk_context;

#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
/**
 * \brief           Context for resuming operations
 */
typedef struct
{
    const mbedtls_pk_info_t *   pk_info; /**< Public key information         */
    void *                      rs_ctx;  /**< Underlying restart context     */
} mbedtls_pk_restart_ctx;
#else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
/* Now we can declare functions that take a pointer to that */
typedef void mbedtls_pk_restart_ctx;
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */

#if defined(MBEDTLS_RSA_C)
/**
 * Quick access to an RSA context inside a PK context.
 *
 * \warning You must make sure the PK context actually holds an RSA context
 * before using this function!
 */
static inline mbedtls_rsa_context *mbedtls_pk_rsa( const mbedtls_pk_context pk )
{
    return( (mbedtls_rsa_context *) (pk).pk_ctx );
}
#endif /* MBEDTLS_RSA_C */

#if defined(MBEDTLS_ECP_C)
/**
 * Quick access to an EC context inside a PK context.
 *
 * \warning You must make sure the PK context actually holds an EC context
 * before using this function!
 */
static inline mbedtls_ecp_keypair *mbedtls_pk_ec( const mbedtls_pk_context pk )
{
    return( (mbedtls_ecp_keypair *) (pk).pk_ctx );
}
#endif /* MBEDTLS_ECP_C */

#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
/**
 * \brief           Types for RSA-alt abstraction
 */
typedef int (*mbedtls_pk_rsa_alt_decrypt_func)( void *ctx, int mode, size_t *olen,
                    const unsigned char *input, unsigned char *output,
                    size_t output_max_len );
typedef int (*mbedtls_pk_rsa_alt_sign_func)( void *ctx,
                    int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
                    int mode, mbedtls_md_type_t md_alg, unsigned int hashlen,
                    const unsigned char *hash, unsigned char *sig );
typedef size_t (*mbedtls_pk_rsa_alt_key_len_func)( void *ctx );
#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */

/**
 * \brief           Return information associated with the given PK type
 *
 * \param pk_type   PK type to search for.
 *
 * \return          The PK info associated with the type or NULL if not found.
 */
const mbedtls_pk_info_t *mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type );

/**
 * \brief           Initialize a #mbedtls_pk_context (as NONE).
 *
 * \param ctx       The context to initialize.
 *                  This must not be \c NULL.
 */
void mbedtls_pk_init( mbedtls_pk_context *ctx );

/**
 * \brief           Free the components of a #mbedtls_pk_context.
 *
 * \param ctx       The context to clear. It must have been initialized.
 *                  If this is \c NULL, this function does nothing.
 *
 * \note            For contexts that have been set up with
 *                  mbedtls_pk_setup_opaque(), this does not free the underlying
 *                  PSA key and you still need to call psa_destroy_key()
 *                  independently if you want to destroy that key.
 */
void mbedtls_pk_free( mbedtls_pk_context *ctx );

#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
/**
 * \brief           Initialize a restart context
 *
 * \param ctx       The context to initialize.
 *                  This must not be \c NULL.
 */
void mbedtls_pk_restart_init( mbedtls_pk_restart_ctx *ctx );

/**
 * \brief           Free the components of a restart context
 *
 * \param ctx       The context to clear. It must have been initialized.
 *                  If this is \c NULL, this function does nothing.
 */
void mbedtls_pk_restart_free( mbedtls_pk_restart_ctx *ctx );
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */

/**
 * \brief           Initialize a PK context with the information given
 *                  and allocates the type-specific PK subcontext.
 *
 * \param ctx       Context to initialize. It must not have been set
 *                  up yet (type #MBEDTLS_PK_NONE).
 * \param info      Information to use
 *
 * \return          0 on success,
 *                  MBEDTLS_ERR_PK_BAD_INPUT_DATA on invalid input,
 *                  MBEDTLS_ERR_PK_ALLOC_FAILED on allocation failure.
 *
 * \note            For contexts holding an RSA-alt key, use
 *                  \c mbedtls_pk_setup_rsa_alt() instead.
 */
int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info );

#if defined(MBEDTLS_USE_PSA_CRYPTO)
/**
 * \brief           Initialize a PK context to wrap a PSA key.
 *
 * \note            This function replaces mbedtls_pk_setup() for contexts
 *                  that wrap a (possibly opaque) PSA key instead of
 *                  storing and manipulating the key material directly.
 *
 * \param ctx       The context to initialize. It must be empty (type NONE).
 * \param key       The PSA key to wrap, which must hold an ECC key pair
 *                  (see notes below).
 *
 * \note            The wrapped key must remain valid as long as the
 *                  wrapping PK context is in use, that is at least between
 *                  the point this function is called and the point
 *                  mbedtls_pk_free() is called on this context. The wrapped
 *                  key might then be independently used or destroyed.
 *
 * \note            This function is currently only available for ECC key
 *                  pairs (that is, ECC keys containing private key material).
 *                  Support for other key types may be added later.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_PK_BAD_INPUT_DATA on invalid input
 *                  (context already used, invalid key identifier).
 * \return          #MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE if the key is not an
 *                  ECC key pair.
 * \return          #MBEDTLS_ERR_PK_ALLOC_FAILED on allocation failure.
 */
int mbedtls_pk_setup_opaque( mbedtls_pk_context *ctx,
                             const psa_key_id_t key );
#endif /* MBEDTLS_USE_PSA_CRYPTO */

#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
/**
 * \brief           Initialize an RSA-alt context
 *
 * \param ctx       Context to initialize. It must not have been set
 *                  up yet (type #MBEDTLS_PK_NONE).
 * \param key       RSA key pointer
 * \param decrypt_func  Decryption function
 * \param sign_func     Signing function
 * \param key_len_func  Function returning key length in bytes
 *
 * \return          0 on success, or MBEDTLS_ERR_PK_BAD_INPUT_DATA if the
 *                  context wasn't already initialized as RSA_ALT.
 *
 * \note            This function replaces \c mbedtls_pk_setup() for RSA-alt.
 */
int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
                         mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
                         mbedtls_pk_rsa_alt_sign_func sign_func,
                         mbedtls_pk_rsa_alt_key_len_func key_len_func );
#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */

/**
 * \brief           Get the size in bits of the underlying key
 *
 * \param ctx       The context to query. It must have been initialized.
 *
 * \return          Key size in bits, or 0 on error
 */
size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx );

/**
 * \brief           Get the length in bytes of the underlying key
 *
 * \param ctx       The context to query. It must have been initialized.
 *
 * \return          Key length in bytes, or 0 on error
 */
static inline size_t mbedtls_pk_get_len( const mbedtls_pk_context *ctx )
{
    return( ( mbedtls_pk_get_bitlen( ctx ) + 7 ) / 8 );
}

/**
 * \brief           Tell if a context can do the operation given by type
 *
 * \param ctx       The context to query. It must have been initialized.
 * \param type      The desired type.
 *
 * \return          1 if the context can do operations on the given type.
 * \return          0 if the context cannot do the operations on the given
 *                  type. This is always the case for a context that has
 *                  been initialized but not set up, or that has been
 *                  cleared with mbedtls_pk_free().
 */
int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type );

/**
 * \brief           Verify signature (including padding if relevant).
 *
 * \param ctx       The PK context to use. It must have been set up.
 * \param md_alg    Hash algorithm used (see notes)
 * \param hash      Hash of the message to sign
 * \param hash_len  Hash length or 0 (see notes)
 * \param sig       Signature to verify
 * \param sig_len   Signature length
 *
 * \return          0 on success (signature is valid),
 *                  #MBEDTLS_ERR_PK_SIG_LEN_MISMATCH if there is a valid
 *                  signature in sig but its length is less than \p siglen,
 *                  or a specific error code.
 *
 * \note            For RSA keys, the default padding type is PKCS#1 v1.5.
 *                  Use \c mbedtls_pk_verify_ext( MBEDTLS_PK_RSASSA_PSS, ... )
 *                  to verify RSASSA_PSS signatures.
 *
 * \note            If hash_len is 0, then the length associated with md_alg
 *                  is used instead, or an error returned if it is invalid.
 *
 * \note            md_alg may be MBEDTLS_MD_NONE, only if hash_len != 0
 */
int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
               const unsigned char *hash, size_t hash_len,
               const unsigned char *sig, size_t sig_len );

/**
 * \brief           Restartable version of \c mbedtls_pk_verify()
 *
 * \note            Performs the same job as \c mbedtls_pk_verify(), but can
 *                  return early and restart according to the limit set with
 *                  \c mbedtls_ecp_set_max_ops() to reduce blocking for ECC
 *                  operations. For RSA, same as \c mbedtls_pk_verify().
 *
 * \param ctx       The PK context to use. It must have been set up.
 * \param md_alg    Hash algorithm used (see notes)
 * \param hash      Hash of the message to sign
 * \param hash_len  Hash length or 0 (see notes)
 * \param sig       Signature to verify
 * \param sig_len   Signature length
 * \param rs_ctx    Restart context (NULL to disable restart)
 *
 * \return          See \c mbedtls_pk_verify(), or
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 */
int mbedtls_pk_verify_restartable( mbedtls_pk_context *ctx,
               mbedtls_md_type_t md_alg,
               const unsigned char *hash, size_t hash_len,
               const unsigned char *sig, size_t sig_len,
               mbedtls_pk_restart_ctx *rs_ctx );

/**
 * \brief           Verify signature, with options.
 *                  (Includes verification of the padding depending on type.)
 *
 * \param type      Signature type (inc. possible padding type) to verify
 * \param options   Pointer to type-specific options, or NULL
 * \param ctx       The PK context to use. It must have been set up.
 * \param md_alg    Hash algorithm used (see notes)
 * \param hash      Hash of the message to sign
 * \param hash_len  Hash length or 0 (see notes)
 * \param sig       Signature to verify
 * \param sig_len   Signature length
 *
 * \return          0 on success (signature is valid),
 *                  #MBEDTLS_ERR_PK_TYPE_MISMATCH if the PK context can't be
 *                  used for this type of signatures,
 *                  #MBEDTLS_ERR_PK_SIG_LEN_MISMATCH if there is a valid
 *                  signature in sig but its length is less than \p siglen,
 *                  or a specific error code.
 *
 * \note            If hash_len is 0, then the length associated with md_alg
 *                  is used instead, or an error returned if it is invalid.
 *
 * \note            md_alg may be MBEDTLS_MD_NONE, only if hash_len != 0
 *
 * \note            If type is MBEDTLS_PK_RSASSA_PSS, then options must point
 *                  to a mbedtls_pk_rsassa_pss_options structure,
 *                  otherwise it must be NULL.
 */
int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
                   mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
                   const unsigned char *hash, size_t hash_len,
                   const unsigned char *sig, size_t sig_len );

/**
 * \brief           Make signature, including padding if relevant.
 *
 * \param ctx       The PK context to use. It must have been set up
 *                  with a private key.
 * \param md_alg    Hash algorithm used (see notes)
 * \param hash      Hash of the message to sign
 * \param hash_len  Hash length or 0 (see notes)
 * \param sig       Place to write the signature.
 *                  It must have enough room for the signature.
 *                  #MBEDTLS_PK_SIGNATURE_MAX_SIZE is always enough.
 *                  You may use a smaller buffer if it is large enough
 *                  given the key type.
 * \param sig_len   On successful return,
 *                  the number of bytes written to \p sig.
 * \param f_rng     RNG function
 * \param p_rng     RNG parameter
 *
 * \return          0 on success, or a specific error code.
 *
 * \note            For RSA keys, the default padding type is PKCS#1 v1.5.
 *                  There is no interface in the PK module to make RSASSA-PSS
 *                  signatures yet.
 *
 * \note            If hash_len is 0, then the length associated with md_alg
 *                  is used instead, or an error returned if it is invalid.
 *
 * \note            For RSA, md_alg may be MBEDTLS_MD_NONE if hash_len != 0.
 *                  For ECDSA, md_alg may never be MBEDTLS_MD_NONE.
 */
int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
             const unsigned char *hash, size_t hash_len,
             unsigned char *sig, size_t *sig_len,
             int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );

/**
 * \brief           Restartable version of \c mbedtls_pk_sign()
 *
 * \note            Performs the same job as \c mbedtls_pk_sign(), but can
 *                  return early and restart according to the limit set with
 *                  \c mbedtls_ecp_set_max_ops() to reduce blocking for ECC
 *                  operations. For RSA, same as \c mbedtls_pk_sign().
 *
 * \param ctx       The PK context to use. It must have been set up
 *                  with a private key.
 * \param md_alg    Hash algorithm used (see notes for mbedtls_pk_sign())
 * \param hash      Hash of the message to sign
 * \param hash_len  Hash length or 0 (see notes for mbedtls_pk_sign())
 * \param sig       Place to write the signature.
 *                  It must have enough room for the signature.
 *                  #MBEDTLS_PK_SIGNATURE_MAX_SIZE is always enough.
 *                  You may use a smaller buffer if it is large enough
 *                  given the key type.
 * \param sig_len   On successful return,
 *                  the number of bytes written to \p sig.
 * \param f_rng     RNG function
 * \param p_rng     RNG parameter
 * \param rs_ctx    Restart context (NULL to disable restart)
 *
 * \return          See \c mbedtls_pk_sign().
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 */
int mbedtls_pk_sign_restartable( mbedtls_pk_context *ctx,
             mbedtls_md_type_t md_alg,
             const unsigned char *hash, size_t hash_len,
             unsigned char *sig, size_t *sig_len,
             int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
             mbedtls_pk_restart_ctx *rs_ctx );

/**
 * \brief           Decrypt message (including padding if relevant).
 *
 * \param ctx       The PK context to use. It must have been set up
 *                  with a private key.
 * \param input     Input to decrypt
 * \param ilen      Input size
 * \param output    Decrypted output
 * \param olen      Decrypted message length
 * \param osize     Size of the output buffer
 * \param f_rng     RNG function
 * \param p_rng     RNG parameter
 *
 * \note            For RSA keys, the default padding type is PKCS#1 v1.5.
 *
 * \return          0 on success, or a specific error code.
 */
int mbedtls_pk_decrypt( mbedtls_pk_context *ctx,
                const unsigned char *input, size_t ilen,
                unsigned char *output, size_t *olen, size_t osize,
                int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );

/**
 * \brief           Encrypt message (including padding if relevant).
 *
 * \param ctx       The PK context to use. It must have been set up.
 * \param input     Message to encrypt
 * \param ilen      Message size
 * \param output    Encrypted output
 * \param olen      Encrypted output length
 * \param osize     Size of the output buffer
 * \param f_rng     RNG function
 * \param p_rng     RNG parameter
 *
 * \note            For RSA keys, the default padding type is PKCS#1 v1.5.
 *
 * \return          0 on success, or a specific error code.
 */
int mbedtls_pk_encrypt( mbedtls_pk_context *ctx,
                const unsigned char *input, size_t ilen,
                unsigned char *output, size_t *olen, size_t osize,
                int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );

/**
 * \brief           Check if a public-private pair of keys matches.
 *
 * \param pub       Context holding a public key.
 * \param prv       Context holding a private (and public) key.
 *
 * \return          \c 0 on success (keys were checked and match each other).
 * \return          #MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE if the keys could not
 *                  be checked - in that case they may or may not match.
 * \return          #MBEDTLS_ERR_PK_BAD_INPUT_DATA if a context is invalid.
 * \return          Another non-zero value if the keys do not match.
 */
int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv );

/**
 * \brief           Export debug information
 *
 * \param ctx       The PK context to use. It must have been initialized.
 * \param items     Place to write debug items
 *
 * \return          0 on success or MBEDTLS_ERR_PK_BAD_INPUT_DATA
 */
int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items );

/**
 * \brief           Access the type name
 *
 * \param ctx       The PK context to use. It must have been initialized.
 *
 * \return          Type name on success, or "invalid PK"
 */
const char * mbedtls_pk_get_name( const mbedtls_pk_context *ctx );

/**
 * \brief           Get the key type
 *
 * \param ctx       The PK context to use. It must have been initialized.
 *
 * \return          Type on success.
 * \return          #MBEDTLS_PK_NONE for a context that has not been set up.
 */
mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx );

#if defined(MBEDTLS_PK_PARSE_C)
/** \ingroup pk_module */
/**
 * \brief           Parse a private key in PEM or DER format
 *
 * \param ctx       The PK context to fill. It must have been initialized
 *                  but not set up.
 * \param key       Input buffer to parse.
 *                  The buffer must contain the input exactly, with no
 *                  extra trailing material. For PEM, the buffer must
 *                  contain a null-terminated string.
 * \param keylen    Size of \b key in bytes.
 *                  For PEM data, this includes the terminating null byte,
 *                  so \p keylen must be equal to `strlen(key) + 1`.
 * \param pwd       Optional password for decryption.
 *                  Pass \c NULL if expecting a non-encrypted key.
 *                  Pass a string of \p pwdlen bytes if expecting an encrypted
 *                  key; a non-encrypted key will also be accepted.
 *                  The empty password is not supported.
 * \param pwdlen    Size of the password in bytes.
 *                  Ignored if \p pwd is \c NULL.
 *
 * \note            On entry, ctx must be empty, either freshly initialised
 *                  with mbedtls_pk_init() or reset with mbedtls_pk_free(). If you need a
 *                  specific key type, check the result with mbedtls_pk_can_do().
 *
 * \note            The key is also checked for correctness.
 *
 * \return          0 if successful, or a specific PK or PEM error code
 */
int mbedtls_pk_parse_key( mbedtls_pk_context *ctx,
                  const unsigned char *key, size_t keylen,
                  const unsigned char *pwd, size_t pwdlen );

/** \ingroup pk_module */
/**
 * \brief           Parse a public key in PEM or DER format
 *
 * \param ctx       The PK context to fill. It must have been initialized
 *                  but not set up.
 * \param key       Input buffer to parse.
 *                  The buffer must contain the input exactly, with no
 *                  extra trailing material. For PEM, the buffer must
 *                  contain a null-terminated string.
 * \param keylen    Size of \b key in bytes.
 *                  For PEM data, this includes the terminating null byte,
 *                  so \p keylen must be equal to `strlen(key) + 1`.
 *
 * \note            On entry, ctx must be empty, either freshly initialised
 *                  with mbedtls_pk_init() or reset with mbedtls_pk_free(). If you need a
 *                  specific key type, check the result with mbedtls_pk_can_do().
 *
 * \note            The key is also checked for correctness.
 *
 * \return          0 if successful, or a specific PK or PEM error code
 */
int mbedtls_pk_parse_public_key( mbedtls_pk_context *ctx,
                         const unsigned char *key, size_t keylen );

#if defined(MBEDTLS_FS_IO)
/** \ingroup pk_module */
/**
 * \brief           Load and parse a private key
 *
 * \param ctx       The PK context to fill. It must have been initialized
 *                  but not set up.
 * \param path      filename to read the private key from
 * \param password  Optional password to decrypt the file.
 *                  Pass \c NULL if expecting a non-encrypted key.
 *                  Pass a null-terminated string if expecting an encrypted
 *                  key; a non-encrypted key will also be accepted.
 *                  The empty password is not supported.
 *
 * \note            On entry, ctx must be empty, either freshly initialised
 *                  with mbedtls_pk_init() or reset with mbedtls_pk_free(). If you need a
 *                  specific key type, check the result with mbedtls_pk_can_do().
 *
 * \note            The key is also checked for correctness.
 *
 * \return          0 if successful, or a specific PK or PEM error code
 */
int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
                      const char *path, const char *password );

/** \ingroup pk_module */
/**
 * \brief           Load and parse a public key
 *
 * \param ctx       The PK context to fill. It must have been initialized
 *                  but not set up.
 * \param path      filename to read the public key from
 *
 * \note            On entry, ctx must be empty, either freshly initialised
 *                  with mbedtls_pk_init() or reset with mbedtls_pk_free(). If
 *                  you need a specific key type, check the result with
 *                  mbedtls_pk_can_do().
 *
 * \note            The key is also checked for correctness.
 *
 * \return          0 if successful, or a specific PK or PEM error code
 */
int mbedtls_pk_parse_public_keyfile( mbedtls_pk_context *ctx, const char *path );
#endif /* MBEDTLS_FS_IO */
#endif /* MBEDTLS_PK_PARSE_C */

#if defined(MBEDTLS_PK_WRITE_C)
/**
 * \brief           Write a private key to a PKCS#1 or SEC1 DER structure
 *                  Note: data is written at the end of the buffer! Use the
 *                        return value to determine where you should start
 *                        using the buffer
 *
 * \param ctx       PK context which must contain a valid private key.
 * \param buf       buffer to write to
 * \param size      size of the buffer
 *
 * \return          length of data written if successful, or a specific
 *                  error code
 */
int mbedtls_pk_write_key_der( mbedtls_pk_context *ctx, unsigned char *buf, size_t size );

/**
 * \brief           Write a public key to a SubjectPublicKeyInfo DER structure
 *                  Note: data is written at the end of the buffer! Use the
 *                        return value to determine where you should start
 *                        using the buffer
 *
 * \param ctx       PK context which must contain a valid public or private key.
 * \param buf       buffer to write to
 * \param size      size of the buffer
 *
 * \return          length of data written if successful, or a specific
 *                  error code
 */
int mbedtls_pk_write_pubkey_der( mbedtls_pk_context *ctx, unsigned char *buf, size_t size );

#if defined(MBEDTLS_PEM_WRITE_C)
/**
 * \brief           Write a public key to a PEM string
 *
 * \param ctx       PK context which must contain a valid public or private key.
 * \param buf       Buffer to write to. The output includes a
 *                  terminating null byte.
 * \param size      Size of the buffer in bytes.
 *
 * \return          0 if successful, or a specific error code
 */
int mbedtls_pk_write_pubkey_pem( mbedtls_pk_context *ctx, unsigned char *buf, size_t size );

/**
 * \brief           Write a private key to a PKCS#1 or SEC1 PEM string
 *
 * \param ctx       PK context which must contain a valid private key.
 * \param buf       Buffer to write to. The output includes a
 *                  terminating null byte.
 * \param size      Size of the buffer in bytes.
 *
 * \return          0 if successful, or a specific error code
 */
int mbedtls_pk_write_key_pem( mbedtls_pk_context *ctx, unsigned char *buf, size_t size );
#endif /* MBEDTLS_PEM_WRITE_C */
#endif /* MBEDTLS_PK_WRITE_C */

/*
 * WARNING: Low-level functions. You probably do not want to use these unless
 *          you are certain you do ;)
 */

#if defined(MBEDTLS_PK_PARSE_C)
/**
 * \brief           Parse a SubjectPublicKeyInfo DER structure
 *
 * \param p         the position in the ASN.1 data
 * \param end       end of the buffer
 * \param pk        The PK context to fill. It must have been initialized
 *                  but not set up.
 *
 * \return          0 if successful, or a specific PK error code
 */
int mbedtls_pk_parse_subpubkey( unsigned char **p, const unsigned char *end,
                        mbedtls_pk_context *pk );
#endif /* MBEDTLS_PK_PARSE_C */

#if defined(MBEDTLS_PK_WRITE_C)
/**
 * \brief           Write a subjectPublicKey to ASN.1 data
 *                  Note: function works backwards in data buffer
 *
 * \param p         reference to current position pointer
 * \param start     start of the buffer (for bounds-checking)
 * \param key       PK context which must contain a valid public or private key.
 *
 * \return          the length written or a negative error code
 */
int mbedtls_pk_write_pubkey( unsigned char **p, unsigned char *start,
                     const mbedtls_pk_context *key );
#endif /* MBEDTLS_PK_WRITE_C */

/*
 * Internal module functions. You probably do not want to use these unless you
 * know you do.
 */
#if defined(MBEDTLS_FS_IO)
int mbedtls_pk_load_file( const char *path, unsigned char **buf, size_t *n );
#endif

#if defined(MBEDTLS_USE_PSA_CRYPTO)
/**
 * \brief           Turn an EC key into an opaque one.
 *
 * \warning         This is a temporary utility function for tests. It might
 *                  change or be removed at any time without notice.
 *
 * \note            Only ECDSA keys are supported so far. Signing with the
 *                  specified hash is the only allowed use of that key.
 *
 * \param pk        Input: the EC key to import to a PSA key.
 *                  Output: a PK context wrapping that PSA key.
 * \param key       Output: a PSA key identifier.
 *                  It's the caller's responsibility to call
 *                  psa_destroy_key() on that key identifier after calling
 *                  mbedtls_pk_free() on the PK context.
 * \param hash_alg  The hash algorithm to allow for use with that key.
 *
 * \return          \c 0 if successful.
 * \return          An Mbed TLS error code otherwise.
 */
int mbedtls_pk_wrap_as_opaque( mbedtls_pk_context *pk,
                               psa_key_id_t *key,
                               psa_algorithm_t hash_alg );
#endif /* MBEDTLS_USE_PSA_CRYPTO */

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_PK_H */


/********* Start of file include/mbedtls/pk_internal.h ************/

/**
 * \file pk_internal.h
 *
 * \brief Public Key abstraction layer: wrapper functions
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_PK_WRAP_H
#define MBEDTLS_PK_WRAP_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



struct mbedtls_pk_info_t
{
    /** Public key type */
    mbedtls_pk_type_t type;

    /** Type name */
    const char *name;

    /** Get key size in bits */
    size_t (*get_bitlen)( const void * );

    /** Tell if the context implements this type (e.g. ECKEY can do ECDSA) */
    int (*can_do)( mbedtls_pk_type_t type );

    /** Verify signature */
    int (*verify_func)( void *ctx, mbedtls_md_type_t md_alg,
                        const unsigned char *hash, size_t hash_len,
                        const unsigned char *sig, size_t sig_len );

    /** Make signature */
    int (*sign_func)( void *ctx, mbedtls_md_type_t md_alg,
                      const unsigned char *hash, size_t hash_len,
                      unsigned char *sig, size_t *sig_len,
                      int (*f_rng)(void *, unsigned char *, size_t),
                      void *p_rng );

#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
    /** Verify signature (restartable) */
    int (*verify_rs_func)( void *ctx, mbedtls_md_type_t md_alg,
                           const unsigned char *hash, size_t hash_len,
                           const unsigned char *sig, size_t sig_len,
                           void *rs_ctx );

    /** Make signature (restartable) */
    int (*sign_rs_func)( void *ctx, mbedtls_md_type_t md_alg,
                         const unsigned char *hash, size_t hash_len,
                         unsigned char *sig, size_t *sig_len,
                         int (*f_rng)(void *, unsigned char *, size_t),
                         void *p_rng, void *rs_ctx );
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */

    /** Decrypt message */
    int (*decrypt_func)( void *ctx, const unsigned char *input, size_t ilen,
                         unsigned char *output, size_t *olen, size_t osize,
                         int (*f_rng)(void *, unsigned char *, size_t),
                         void *p_rng );

    /** Encrypt message */
    int (*encrypt_func)( void *ctx, const unsigned char *input, size_t ilen,
                         unsigned char *output, size_t *olen, size_t osize,
                         int (*f_rng)(void *, unsigned char *, size_t),
                         void *p_rng );

    /** Check public-private key pair */
    int (*check_pair_func)( const void *pub, const void *prv );

    /** Allocate a new context */
    void * (*ctx_alloc_func)( void );

    /** Free the given context */
    void (*ctx_free_func)( void *ctx );

#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
    /** Allocate the restart context */
    void * (*rs_alloc_func)( void );

    /** Free the restart context */
    void (*rs_free_func)( void *rs_ctx );
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */

    /** Interface with the debug module */
    void (*debug_func)( const void *ctx, mbedtls_pk_debug_item *items );

};
#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
/* Container for RSA-alt */
typedef struct
{
    void *key;
    mbedtls_pk_rsa_alt_decrypt_func decrypt_func;
    mbedtls_pk_rsa_alt_sign_func sign_func;
    mbedtls_pk_rsa_alt_key_len_func key_len_func;
} mbedtls_rsa_alt_context;
#endif

#if defined(MBEDTLS_RSA_C)
extern const mbedtls_pk_info_t mbedtls_rsa_info;
#endif

#if defined(MBEDTLS_ECP_C)
extern const mbedtls_pk_info_t mbedtls_eckey_info;
extern const mbedtls_pk_info_t mbedtls_eckeydh_info;
#endif

#if defined(MBEDTLS_ECDSA_C)
extern const mbedtls_pk_info_t mbedtls_ecdsa_info;
#endif

#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
extern const mbedtls_pk_info_t mbedtls_rsa_alt_info;
#endif

#if defined(MBEDTLS_USE_PSA_CRYPTO)
extern const mbedtls_pk_info_t mbedtls_pk_opaque_info;
#endif

#endif /* MBEDTLS_PK_WRAP_H */


/********* Start of file include/mbedtls/x509.h ************/

/**
 * \file x509.h
 *
 * \brief X.509 generic defines and structures
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_X509_H
#define MBEDTLS_X509_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif




#if defined(MBEDTLS_RSA_C)

#endif

/**
 * \addtogroup x509_module
 * \{
 */

#if !defined(MBEDTLS_X509_MAX_INTERMEDIATE_CA)
/**
 * Maximum number of intermediate CAs in a verification chain.
 * That is, maximum length of the chain, excluding the end-entity certificate
 * and the trusted root certificate.
 *
 * Set this to a low value to prevent an adversary from making you waste
 * resources verifying an overlong certificate chain.
 */
#define MBEDTLS_X509_MAX_INTERMEDIATE_CA   8
#endif

/**
 * \name X509 Error codes
 * \{
 */
/** Unavailable feature, e.g. RSA hashing/encryption combination. */
#define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE              -0x2080
/** Requested OID is unknown. */
#define MBEDTLS_ERR_X509_UNKNOWN_OID                      -0x2100
/** The CRT/CRL/CSR format is invalid, e.g. different type expected. */
#define MBEDTLS_ERR_X509_INVALID_FORMAT                   -0x2180
/** The CRT/CRL/CSR version element is invalid. */
#define MBEDTLS_ERR_X509_INVALID_VERSION                  -0x2200
/** The serial tag or value is invalid. */
#define MBEDTLS_ERR_X509_INVALID_SERIAL                   -0x2280
/** The algorithm tag or value is invalid. */
#define MBEDTLS_ERR_X509_INVALID_ALG                      -0x2300
/** The name tag or value is invalid. */
#define MBEDTLS_ERR_X509_INVALID_NAME                     -0x2380
/** The date tag or value is invalid. */
#define MBEDTLS_ERR_X509_INVALID_DATE                     -0x2400
/** The signature tag or value invalid. */
#define MBEDTLS_ERR_X509_INVALID_SIGNATURE                -0x2480
/** The extension tag or value is invalid. */
#define MBEDTLS_ERR_X509_INVALID_EXTENSIONS               -0x2500
/** CRT/CRL/CSR has an unsupported version number. */
#define MBEDTLS_ERR_X509_UNKNOWN_VERSION                  -0x2580
/** Signature algorithm (oid) is unsupported. */
#define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG                  -0x2600
/** Signature algorithms do not match. (see \c ::mbedtls_x509_crt sig_oid) */
#define MBEDTLS_ERR_X509_SIG_MISMATCH                     -0x2680
/** Certificate verification failed, e.g. CRL, CA or signature check failed. */
#define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED               -0x2700
/** Format not recognized as DER or PEM. */
#define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT              -0x2780
/** Input invalid. */
#define MBEDTLS_ERR_X509_BAD_INPUT_DATA                   -0x2800
/** Allocation of memory failed. */
#define MBEDTLS_ERR_X509_ALLOC_FAILED                     -0x2880
/** Read/write of file failed. */
#define MBEDTLS_ERR_X509_FILE_IO_ERROR                    -0x2900
/** Destination buffer is too small. */
#define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL                 -0x2980
/** A fatal error occurred, eg the chain is too long or the vrfy callback failed. */
#define MBEDTLS_ERR_X509_FATAL_ERROR                      -0x3000
/* \} name */

/**
 * \name X509 Verify codes
 * \{
 */
/* Reminder: update x509_crt_verify_strings[] in library/x509_crt.c */
#define MBEDTLS_X509_BADCERT_EXPIRED             0x01  /**< The certificate validity has expired. */
#define MBEDTLS_X509_BADCERT_REVOKED             0x02  /**< The certificate has been revoked (is on a CRL). */
#define MBEDTLS_X509_BADCERT_CN_MISMATCH         0x04  /**< The certificate Common Name (CN) does not match with the expected CN. */
#define MBEDTLS_X509_BADCERT_NOT_TRUSTED         0x08  /**< The certificate is not correctly signed by the trusted CA. */
#define MBEDTLS_X509_BADCRL_NOT_TRUSTED          0x10  /**< The CRL is not correctly signed by the trusted CA. */
#define MBEDTLS_X509_BADCRL_EXPIRED              0x20  /**< The CRL is expired. */
#define MBEDTLS_X509_BADCERT_MISSING             0x40  /**< Certificate was missing. */
#define MBEDTLS_X509_BADCERT_SKIP_VERIFY         0x80  /**< Certificate verification was skipped. */
#define MBEDTLS_X509_BADCERT_OTHER             0x0100  /**< Other reason (can be used by verify callback) */
#define MBEDTLS_X509_BADCERT_FUTURE            0x0200  /**< The certificate validity starts in the future. */
#define MBEDTLS_X509_BADCRL_FUTURE             0x0400  /**< The CRL is from the future */
#define MBEDTLS_X509_BADCERT_KEY_USAGE         0x0800  /**< Usage does not match the keyUsage extension. */
#define MBEDTLS_X509_BADCERT_EXT_KEY_USAGE     0x1000  /**< Usage does not match the extendedKeyUsage extension. */
#define MBEDTLS_X509_BADCERT_NS_CERT_TYPE      0x2000  /**< Usage does not match the nsCertType extension. */
#define MBEDTLS_X509_BADCERT_BAD_MD            0x4000  /**< The certificate is signed with an unacceptable hash. */
#define MBEDTLS_X509_BADCERT_BAD_PK            0x8000  /**< The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
#define MBEDTLS_X509_BADCERT_BAD_KEY         0x010000  /**< The certificate is signed with an unacceptable key (eg bad curve, RSA too short). */
#define MBEDTLS_X509_BADCRL_BAD_MD           0x020000  /**< The CRL is signed with an unacceptable hash. */
#define MBEDTLS_X509_BADCRL_BAD_PK           0x040000  /**< The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
#define MBEDTLS_X509_BADCRL_BAD_KEY          0x080000  /**< The CRL is signed with an unacceptable key (eg bad curve, RSA too short). */

/* \} name */
/* \} addtogroup x509_module */

/*
 * X.509 v3 Subject Alternative Name types.
 *      otherName                       [0]     OtherName,
 *      rfc822Name                      [1]     IA5String,
 *      dNSName                         [2]     IA5String,
 *      x400Address                     [3]     ORAddress,
 *      directoryName                   [4]     Name,
 *      ediPartyName                    [5]     EDIPartyName,
 *      uniformResourceIdentifier       [6]     IA5String,
 *      iPAddress                       [7]     OCTET STRING,
 *      registeredID                    [8]     OBJECT IDENTIFIER
 */
#define MBEDTLS_X509_SAN_OTHER_NAME                      0
#define MBEDTLS_X509_SAN_RFC822_NAME                     1
#define MBEDTLS_X509_SAN_DNS_NAME                        2
#define MBEDTLS_X509_SAN_X400_ADDRESS_NAME               3
#define MBEDTLS_X509_SAN_DIRECTORY_NAME                  4
#define MBEDTLS_X509_SAN_EDI_PARTY_NAME                  5
#define MBEDTLS_X509_SAN_UNIFORM_RESOURCE_IDENTIFIER     6
#define MBEDTLS_X509_SAN_IP_ADDRESS                      7
#define MBEDTLS_X509_SAN_REGISTERED_ID                   8

/*
 * X.509 v3 Key Usage Extension flags
 * Reminder: update x509_info_key_usage() when adding new flags.
 */
#define MBEDTLS_X509_KU_DIGITAL_SIGNATURE            (0x80)  /* bit 0 */
#define MBEDTLS_X509_KU_NON_REPUDIATION              (0x40)  /* bit 1 */
#define MBEDTLS_X509_KU_KEY_ENCIPHERMENT             (0x20)  /* bit 2 */
#define MBEDTLS_X509_KU_DATA_ENCIPHERMENT            (0x10)  /* bit 3 */
#define MBEDTLS_X509_KU_KEY_AGREEMENT                (0x08)  /* bit 4 */
#define MBEDTLS_X509_KU_KEY_CERT_SIGN                (0x04)  /* bit 5 */
#define MBEDTLS_X509_KU_CRL_SIGN                     (0x02)  /* bit 6 */
#define MBEDTLS_X509_KU_ENCIPHER_ONLY                (0x01)  /* bit 7 */
#define MBEDTLS_X509_KU_DECIPHER_ONLY              (0x8000)  /* bit 8 */

/*
 * Netscape certificate types
 * (http://www.mozilla.org/projects/security/pki/nss/tech-notes/tn3.html)
 */

#define MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT         (0x80)  /* bit 0 */
#define MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER         (0x40)  /* bit 1 */
#define MBEDTLS_X509_NS_CERT_TYPE_EMAIL              (0x20)  /* bit 2 */
#define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING     (0x10)  /* bit 3 */
#define MBEDTLS_X509_NS_CERT_TYPE_RESERVED           (0x08)  /* bit 4 */
#define MBEDTLS_X509_NS_CERT_TYPE_SSL_CA             (0x04)  /* bit 5 */
#define MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA           (0x02)  /* bit 6 */
#define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA  (0x01)  /* bit 7 */

/*
 * X.509 extension types
 *
 * Comments refer to the status for using certificates. Status can be
 * different for writing certificates or reading CRLs or CSRs.
 *
 * Those are defined in oid.h as oid.c needs them in a data structure. Since
 * these were previously defined here, let's have aliases for compatibility.
 */
#define MBEDTLS_X509_EXT_AUTHORITY_KEY_IDENTIFIER MBEDTLS_OID_X509_EXT_AUTHORITY_KEY_IDENTIFIER
#define MBEDTLS_X509_EXT_SUBJECT_KEY_IDENTIFIER   MBEDTLS_OID_X509_EXT_SUBJECT_KEY_IDENTIFIER
#define MBEDTLS_X509_EXT_KEY_USAGE                MBEDTLS_OID_X509_EXT_KEY_USAGE
#define MBEDTLS_X509_EXT_CERTIFICATE_POLICIES     MBEDTLS_OID_X509_EXT_CERTIFICATE_POLICIES
#define MBEDTLS_X509_EXT_POLICY_MAPPINGS          MBEDTLS_OID_X509_EXT_POLICY_MAPPINGS
#define MBEDTLS_X509_EXT_SUBJECT_ALT_NAME         MBEDTLS_OID_X509_EXT_SUBJECT_ALT_NAME         /* Supported (DNS) */
#define MBEDTLS_X509_EXT_ISSUER_ALT_NAME          MBEDTLS_OID_X509_EXT_ISSUER_ALT_NAME
#define MBEDTLS_X509_EXT_SUBJECT_DIRECTORY_ATTRS  MBEDTLS_OID_X509_EXT_SUBJECT_DIRECTORY_ATTRS
#define MBEDTLS_X509_EXT_BASIC_CONSTRAINTS        MBEDTLS_OID_X509_EXT_BASIC_CONSTRAINTS        /* Supported */
#define MBEDTLS_X509_EXT_NAME_CONSTRAINTS         MBEDTLS_OID_X509_EXT_NAME_CONSTRAINTS
#define MBEDTLS_X509_EXT_POLICY_CONSTRAINTS       MBEDTLS_OID_X509_EXT_POLICY_CONSTRAINTS
#define MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE       MBEDTLS_OID_X509_EXT_EXTENDED_KEY_USAGE
#define MBEDTLS_X509_EXT_CRL_DISTRIBUTION_POINTS  MBEDTLS_OID_X509_EXT_CRL_DISTRIBUTION_POINTS
#define MBEDTLS_X509_EXT_INIHIBIT_ANYPOLICY       MBEDTLS_OID_X509_EXT_INIHIBIT_ANYPOLICY
#define MBEDTLS_X509_EXT_FRESHEST_CRL             MBEDTLS_OID_X509_EXT_FRESHEST_CRL
#define MBEDTLS_X509_EXT_NS_CERT_TYPE             MBEDTLS_OID_X509_EXT_NS_CERT_TYPE

/*
 * Storage format identifiers
 * Recognized formats: PEM and DER
 */
#define MBEDTLS_X509_FORMAT_DER                 1
#define MBEDTLS_X509_FORMAT_PEM                 2

#define MBEDTLS_X509_MAX_DN_NAME_SIZE         256 /**< Maximum value size of a DN entry */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \addtogroup x509_module
 * \{ */

/**
 * \name Structures for parsing X.509 certificates, CRLs and CSRs
 * \{
 */

/**
 * Type-length-value structure that allows for ASN1 using DER.
 */
typedef mbedtls_asn1_buf mbedtls_x509_buf;

/**
 * Container for ASN1 bit strings.
 */
typedef mbedtls_asn1_bitstring mbedtls_x509_bitstring;

/**
 * Container for ASN1 named information objects.
 * It allows for Relative Distinguished Names (e.g. cn=localhost,ou=code,etc.).
 */
typedef mbedtls_asn1_named_data mbedtls_x509_name;

/**
 * Container for a sequence of ASN.1 items
 */
typedef mbedtls_asn1_sequence mbedtls_x509_sequence;

/** Container for date and time (precision in seconds). */
typedef struct mbedtls_x509_time
{
    int year, mon, day;         /**< Date. */
    int hour, min, sec;         /**< Time. */
}
mbedtls_x509_time;

/** \} name Structures for parsing X.509 certificates, CRLs and CSRs */
/** \} addtogroup x509_module */

/**
 * \brief          Store the certificate DN in printable form into buf;
 *                 no more than size characters will be written.
 *
 * \param buf      Buffer to write to
 * \param size     Maximum size of buffer
 * \param dn       The X509 name to represent
 *
 * \return         The length of the string written (not including the
 *                 terminated nul byte), or a negative error code.
 */
int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn );

/**
 * \brief          Store the certificate serial in printable form into buf;
 *                 no more than size characters will be written.
 *
 * \param buf      Buffer to write to
 * \param size     Maximum size of buffer
 * \param serial   The X509 serial to represent
 *
 * \return         The length of the string written (not including the
 *                 terminated nul byte), or a negative error code.
 */
int mbedtls_x509_serial_gets( char *buf, size_t size, const mbedtls_x509_buf *serial );

/**
 * \brief          Check a given mbedtls_x509_time against the system time
 *                 and tell if it's in the past.
 *
 * \note           Intended usage is "if( is_past( valid_to ) ) ERROR".
 *                 Hence the return value of 1 if on internal errors.
 *
 * \param to       mbedtls_x509_time to check
 *
 * \return         1 if the given time is in the past or an error occurred,
 *                 0 otherwise.
 */
int mbedtls_x509_time_is_past( const mbedtls_x509_time *to );

/**
 * \brief          Check a given mbedtls_x509_time against the system time
 *                 and tell if it's in the future.
 *
 * \note           Intended usage is "if( is_future( valid_from ) ) ERROR".
 *                 Hence the return value of 1 if on internal errors.
 *
 * \param from     mbedtls_x509_time to check
 *
 * \return         1 if the given time is in the future or an error occurred,
 *                 0 otherwise.
 */
int mbedtls_x509_time_is_future( const mbedtls_x509_time *from );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int mbedtls_x509_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

/*
 * Internal module functions. You probably do not want to use these unless you
 * know you do.
 */
int mbedtls_x509_get_name( unsigned char **p, const unsigned char *end,
                   mbedtls_x509_name *cur );
int mbedtls_x509_get_alg_null( unsigned char **p, const unsigned char *end,
                       mbedtls_x509_buf *alg );
int mbedtls_x509_get_alg( unsigned char **p, const unsigned char *end,
                  mbedtls_x509_buf *alg, mbedtls_x509_buf *params );
#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
int mbedtls_x509_get_rsassa_pss_params( const mbedtls_x509_buf *params,
                                mbedtls_md_type_t *md_alg, mbedtls_md_type_t *mgf_md,
                                int *salt_len );
#endif
int mbedtls_x509_get_sig( unsigned char **p, const unsigned char *end, mbedtls_x509_buf *sig );
int mbedtls_x509_get_sig_alg( const mbedtls_x509_buf *sig_oid, const mbedtls_x509_buf *sig_params,
                      mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg,
                      void **sig_opts );
int mbedtls_x509_get_time( unsigned char **p, const unsigned char *end,
                   mbedtls_x509_time *t );
int mbedtls_x509_get_serial( unsigned char **p, const unsigned char *end,
                     mbedtls_x509_buf *serial );
int mbedtls_x509_get_ext( unsigned char **p, const unsigned char *end,
                  mbedtls_x509_buf *ext, int tag );
int mbedtls_x509_sig_alg_gets( char *buf, size_t size, const mbedtls_x509_buf *sig_oid,
                       mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
                       const void *sig_opts );
int mbedtls_x509_key_size_helper( char *buf, size_t buf_size, const char *name );
int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name );
int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
                        int critical, const unsigned char *val,
                        size_t val_len );
int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
                           mbedtls_asn1_named_data *first );
int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
                      mbedtls_asn1_named_data *first );
int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
                    const char *oid, size_t oid_len,
                    unsigned char *sig, size_t size );

#define MBEDTLS_X509_SAFE_SNPRINTF                          \
    do {                                                    \
        if( ret < 0 || (size_t) ret >= n )                  \
            return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL );    \
                                                            \
        n -= (size_t) ret;                                  \
        p += (size_t) ret;                                  \
    } while( 0 )

#ifdef __cplusplus
}
#endif

#endif /* x509.h */


/********* Start of file include/mbedtls/x509_crl.h ************/

/**
 * \file x509_crl.h
 *
 * \brief X.509 certificate revocation list parsing
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_X509_CRL_H
#define MBEDTLS_X509_CRL_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#ifdef __cplusplus
extern "C" {
#endif

/**
 * \addtogroup x509_module
 * \{ */

/**
 * \name Structures and functions for parsing CRLs
 * \{
 */

/**
 * Certificate revocation list entry.
 * Contains the CA-specific serial numbers and revocation dates.
 */
typedef struct mbedtls_x509_crl_entry
{
    mbedtls_x509_buf raw;

    mbedtls_x509_buf serial;

    mbedtls_x509_time revocation_date;

    mbedtls_x509_buf entry_ext;

    struct mbedtls_x509_crl_entry *next;
}
mbedtls_x509_crl_entry;

/**
 * Certificate revocation list structure.
 * Every CRL may have multiple entries.
 */
typedef struct mbedtls_x509_crl
{
    mbedtls_x509_buf raw;           /**< The raw certificate data (DER). */
    mbedtls_x509_buf tbs;           /**< The raw certificate body (DER). The part that is To Be Signed. */

    int version;            /**< CRL version (1=v1, 2=v2) */
    mbedtls_x509_buf sig_oid;       /**< CRL signature type identifier */

    mbedtls_x509_buf issuer_raw;    /**< The raw issuer data (DER). */

    mbedtls_x509_name issuer;       /**< The parsed issuer data (named information object). */

    mbedtls_x509_time this_update;
    mbedtls_x509_time next_update;

    mbedtls_x509_crl_entry entry;   /**< The CRL entries containing the certificate revocation times for this CA. */

    mbedtls_x509_buf crl_ext;

    mbedtls_x509_buf sig_oid2;
    mbedtls_x509_buf sig;
    mbedtls_md_type_t sig_md;           /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
    mbedtls_pk_type_t sig_pk;           /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
    void *sig_opts;             /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */

    struct mbedtls_x509_crl *next;
}
mbedtls_x509_crl;

/**
 * \brief          Parse a DER-encoded CRL and append it to the chained list
 *
 * \param chain    points to the start of the chain
 * \param buf      buffer holding the CRL data in DER format
 * \param buflen   size of the buffer
 *                 (including the terminating null byte for PEM data)
 *
 * \return         0 if successful, or a specific X509 or PEM error code
 */
int mbedtls_x509_crl_parse_der( mbedtls_x509_crl *chain,
                        const unsigned char *buf, size_t buflen );
/**
 * \brief          Parse one or more CRLs and append them to the chained list
 *
 * \note           Multiple CRLs are accepted only if using PEM format
 *
 * \param chain    points to the start of the chain
 * \param buf      buffer holding the CRL data in PEM or DER format
 * \param buflen   size of the buffer
 *                 (including the terminating null byte for PEM data)
 *
 * \return         0 if successful, or a specific X509 or PEM error code
 */
int mbedtls_x509_crl_parse( mbedtls_x509_crl *chain, const unsigned char *buf, size_t buflen );

#if defined(MBEDTLS_FS_IO)
/**
 * \brief          Load one or more CRLs and append them to the chained list
 *
 * \note           Multiple CRLs are accepted only if using PEM format
 *
 * \param chain    points to the start of the chain
 * \param path     filename to read the CRLs from (in PEM or DER encoding)
 *
 * \return         0 if successful, or a specific X509 or PEM error code
 */
int mbedtls_x509_crl_parse_file( mbedtls_x509_crl *chain, const char *path );
#endif /* MBEDTLS_FS_IO */

/**
 * \brief          Returns an informational string about the CRL.
 *
 * \param buf      Buffer to write to
 * \param size     Maximum size of buffer
 * \param prefix   A line prefix
 * \param crl      The X509 CRL to represent
 *
 * \return         The length of the string written (not including the
 *                 terminated nul byte), or a negative error code.
 */
int mbedtls_x509_crl_info( char *buf, size_t size, const char *prefix,
                   const mbedtls_x509_crl *crl );

/**
 * \brief          Initialize a CRL (chain)
 *
 * \param crl      CRL chain to initialize
 */
void mbedtls_x509_crl_init( mbedtls_x509_crl *crl );

/**
 * \brief          Unallocate all CRL data
 *
 * \param crl      CRL chain to free
 */
void mbedtls_x509_crl_free( mbedtls_x509_crl *crl );

/* \} name */
/* \} addtogroup x509_module */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_x509_crl.h */


/********* Start of file include/mbedtls/x509_crt.h ************/

/**
 * \file x509_crt.h
 *
 * \brief X.509 certificate parsing and writing
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_X509_CRT_H
#define MBEDTLS_X509_CRT_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif





/**
 * \addtogroup x509_module
 * \{
 */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \name Structures and functions for parsing and writing X.509 certificates
 * \{
 */

/**
 * Container for an X.509 certificate. The certificate may be chained.
 */
typedef struct mbedtls_x509_crt
{
    int own_buffer;                     /**< Indicates if \c raw is owned
                                         *   by the structure or not.        */
    mbedtls_x509_buf raw;               /**< The raw certificate data (DER). */
    mbedtls_x509_buf tbs;               /**< The raw certificate body (DER). The part that is To Be Signed. */

    int version;                /**< The X.509 version. (1=v1, 2=v2, 3=v3) */
    mbedtls_x509_buf serial;            /**< Unique id for certificate issued by a specific CA. */
    mbedtls_x509_buf sig_oid;           /**< Signature algorithm, e.g. sha1RSA */

    mbedtls_x509_buf issuer_raw;        /**< The raw issuer data (DER). Used for quick comparison. */
    mbedtls_x509_buf subject_raw;       /**< The raw subject data (DER). Used for quick comparison. */

    mbedtls_x509_name issuer;           /**< The parsed issuer data (named information object). */
    mbedtls_x509_name subject;          /**< The parsed subject data (named information object). */

    mbedtls_x509_time valid_from;       /**< Start time of certificate validity. */
    mbedtls_x509_time valid_to;         /**< End time of certificate validity. */

    mbedtls_x509_buf pk_raw;
    mbedtls_pk_context pk;              /**< Container for the public key context. */

    mbedtls_x509_buf issuer_id;         /**< Optional X.509 v2/v3 issuer unique identifier. */
    mbedtls_x509_buf subject_id;        /**< Optional X.509 v2/v3 subject unique identifier. */
    mbedtls_x509_buf v3_ext;            /**< Optional X.509 v3 extensions.  */
    mbedtls_x509_sequence subject_alt_names;    /**< Optional list of raw entries of Subject Alternative Names extension (currently only dNSName and OtherName are listed). */

    mbedtls_x509_sequence certificate_policies; /**< Optional list of certificate policies (Only anyPolicy is printed and enforced, however the rest of the policies are still listed). */

    int ext_types;              /**< Bit string containing detected and parsed extensions */
    int ca_istrue;              /**< Optional Basic Constraint extension value: 1 if this certificate belongs to a CA, 0 otherwise. */
    int max_pathlen;            /**< Optional Basic Constraint extension value: The maximum path length to the root certificate. Path length is 1 higher than RFC 5280 'meaning', so 1+ */

    unsigned int key_usage;     /**< Optional key usage extension value: See the values in x509.h */

    mbedtls_x509_sequence ext_key_usage; /**< Optional list of extended key usage OIDs. */

    unsigned char ns_cert_type; /**< Optional Netscape certificate type extension value: See the values in x509.h */

    mbedtls_x509_buf sig;               /**< Signature: hash of the tbs part signed with the private key. */
    mbedtls_md_type_t sig_md;           /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
    mbedtls_pk_type_t sig_pk;           /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
    void *sig_opts;             /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */

    struct mbedtls_x509_crt *next;     /**< Next certificate in the CA-chain. */
}
mbedtls_x509_crt;

/**
 * From RFC 5280 section 4.2.1.6:
 * OtherName ::= SEQUENCE {
 *      type-id    OBJECT IDENTIFIER,
 *      value      [0] EXPLICIT ANY DEFINED BY type-id }
 */
typedef struct mbedtls_x509_san_other_name
{
    /**
     * The type_id is an OID as deifned in RFC 5280.
     * To check the value of the type id, you should use
     * \p MBEDTLS_OID_CMP with a known OID mbedtls_x509_buf.
     */
    mbedtls_x509_buf type_id;                   /**< The type id. */
    union
    {
        /**
         * From RFC 4108 section 5:
         * HardwareModuleName ::= SEQUENCE {
         *                         hwType OBJECT IDENTIFIER,
         *                         hwSerialNum OCTET STRING }
         */
        struct
        {
            mbedtls_x509_buf oid;               /**< The object identifier. */
            mbedtls_x509_buf val;               /**< The named value. */
        }
        hardware_module_name;
    }
    value;
}
mbedtls_x509_san_other_name;

/**
 * A structure for holding the parsed Subject Alternative Name, according to type
 */
typedef struct mbedtls_x509_subject_alternative_name
{
    int type;                              /**< The SAN type, value of MBEDTLS_X509_SAN_XXX. */
    union {
        mbedtls_x509_san_other_name other_name; /**< The otherName supported type. */
        mbedtls_x509_buf   unstructured_name; /**< The buffer for the un constructed types. Only dnsName currently supported */
    }
    san; /**< A union of the supported SAN types */
}
mbedtls_x509_subject_alternative_name;

/**
 * Build flag from an algorithm/curve identifier (pk, md, ecp)
 * Since 0 is always XXX_NONE, ignore it.
 */
#define MBEDTLS_X509_ID_FLAG( id )   ( 1 << ( (id) - 1 ) )

/**
 * Security profile for certificate verification.
 *
 * All lists are bitfields, built by ORing flags from MBEDTLS_X509_ID_FLAG().
 */
typedef struct mbedtls_x509_crt_profile
{
    uint32_t allowed_mds;       /**< MDs for signatures         */
    uint32_t allowed_pks;       /**< PK algs for signatures     */
    uint32_t allowed_curves;    /**< Elliptic curves for ECDSA  */
    uint32_t rsa_min_bitlen;    /**< Minimum size for RSA keys  */
}
mbedtls_x509_crt_profile;

#define MBEDTLS_X509_CRT_VERSION_1              0
#define MBEDTLS_X509_CRT_VERSION_2              1
#define MBEDTLS_X509_CRT_VERSION_3              2

#define MBEDTLS_X509_RFC5280_MAX_SERIAL_LEN 32
#define MBEDTLS_X509_RFC5280_UTC_TIME_LEN   15

#if !defined( MBEDTLS_X509_MAX_FILE_PATH_LEN )
#define MBEDTLS_X509_MAX_FILE_PATH_LEN 512
#endif

/**
 * Container for writing a certificate (CRT)
 */
typedef struct mbedtls_x509write_cert
{
    int version;
    mbedtls_mpi serial;
    mbedtls_pk_context *subject_key;
    mbedtls_pk_context *issuer_key;
    mbedtls_asn1_named_data *subject;
    mbedtls_asn1_named_data *issuer;
    mbedtls_md_type_t md_alg;
    char not_before[MBEDTLS_X509_RFC5280_UTC_TIME_LEN + 1];
    char not_after[MBEDTLS_X509_RFC5280_UTC_TIME_LEN + 1];
    mbedtls_asn1_named_data *extensions;
}
mbedtls_x509write_cert;

/**
 * Item in a verification chain: cert and flags for it
 */
typedef struct {
    mbedtls_x509_crt *crt;
    uint32_t flags;
} mbedtls_x509_crt_verify_chain_item;

/**
 * Max size of verification chain: end-entity + intermediates + trusted root
 */
#define MBEDTLS_X509_MAX_VERIFY_CHAIN_SIZE  ( MBEDTLS_X509_MAX_INTERMEDIATE_CA + 2 )

/**
 * Verification chain as built by \c mbedtls_crt_verify_chain()
 */
typedef struct
{
    mbedtls_x509_crt_verify_chain_item items[MBEDTLS_X509_MAX_VERIFY_CHAIN_SIZE];
    unsigned len;

#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
    /* This stores the list of potential trusted signers obtained from
     * the CA callback used for the CRT verification, if configured.
     * We must track it somewhere because the callback passes its
     * ownership to the caller. */
    mbedtls_x509_crt *trust_ca_cb_result;
#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
} mbedtls_x509_crt_verify_chain;

#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)

/**
 * \brief       Context for resuming X.509 verify operations
 */
typedef struct
{
    /* for check_signature() */
    mbedtls_pk_restart_ctx pk;

    /* for find_parent_in() */
    mbedtls_x509_crt *parent; /* non-null iff parent_in in progress */
    mbedtls_x509_crt *fallback_parent;
    int fallback_signature_is_good;

    /* for find_parent() */
    int parent_is_trusted; /* -1 if find_parent is not in progress */

    /* for verify_chain() */
    enum {
        x509_crt_rs_none,
        x509_crt_rs_find_parent,
    } in_progress;  /* none if no operation is in progress */
    int self_cnt;
    mbedtls_x509_crt_verify_chain ver_chain;

} mbedtls_x509_crt_restart_ctx;

#else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */

/* Now we can declare functions that take a pointer to that */
typedef void mbedtls_x509_crt_restart_ctx;

#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */

#if defined(MBEDTLS_X509_CRT_PARSE_C)
/**
 * Default security profile. Should provide a good balance between security
 * and compatibility with current deployments.
 *
 * This profile permits:
 * - SHA2 hashes.
 * - All supported elliptic curves.
 * - RSA with 2048 bits and above.
 *
 * New minor versions of Mbed TLS may extend this profile, for example if
 * new curves are added to the library. New minor versions of Mbed TLS will
 * not reduce this profile unless serious security concerns require it.
 */
extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_default;

/**
 * Expected next default profile. Recommended for new deployments.
 * Currently targets a 128-bit security level, except for allowing RSA-2048.
 */
extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_next;

/**
 * NSA Suite B profile.
 */
extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_suiteb;

/**
 * \brief          Parse a single DER formatted certificate and add it
 *                 to the end of the provided chained list.
 *
 * \param chain    The pointer to the start of the CRT chain to attach to.
 *                 When parsing the first CRT in a chain, this should point
 *                 to an instance of ::mbedtls_x509_crt initialized through
 *                 mbedtls_x509_crt_init().
 * \param buf      The buffer holding the DER encoded certificate.
 * \param buflen   The size in Bytes of \p buf.
 *
 * \note           This function makes an internal copy of the CRT buffer
 *                 \p buf. In particular, \p buf may be destroyed or reused
 *                 after this call returns. To avoid duplicating the CRT
 *                 buffer (at the cost of stricter lifetime constraints),
 *                 use mbedtls_x509_crt_parse_der_nocopy() instead.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain,
                                const unsigned char *buf,
                                size_t buflen );

/**
 * \brief          The type of certificate extension callbacks.
 *
 *                 Callbacks of this type are passed to and used by the
 *                 mbedtls_x509_crt_parse_der_with_ext_cb() routine when
 *                 it encounters either an unsupported extension or a
 *                 "certificate policies" extension containing any
 *                 unsupported certificate policies.
 *                 Future versions of the library may invoke the callback
 *                 in other cases, if and when the need arises.
 *
 * \param p_ctx    An opaque context passed to the callback.
 * \param crt      The certificate being parsed.
 * \param oid      The OID of the extension.
 * \param critical Whether the extension is critical.
 * \param p        Pointer to the start of the extension value
 *                 (the content of the OCTET STRING).
 * \param end      End of extension value.
 *
 * \note           The callback must fail and return a negative error code
 *                 if it can not parse or does not support the extension.
 *                 When the callback fails to parse a critical extension
 *                 mbedtls_x509_crt_parse_der_with_ext_cb() also fails.
 *                 When the callback fails to parse a non critical extension
 *                 mbedtls_x509_crt_parse_der_with_ext_cb() simply skips
 *                 the extension and continues parsing.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
typedef int (*mbedtls_x509_crt_ext_cb_t)( void *p_ctx,
                                          mbedtls_x509_crt const *crt,
                                          mbedtls_x509_buf const *oid,
                                          int critical,
                                          const unsigned char *p,
                                          const unsigned char *end );

/**
 * \brief            Parse a single DER formatted certificate and add it
 *                   to the end of the provided chained list.
 *
 * \param chain      The pointer to the start of the CRT chain to attach to.
 *                   When parsing the first CRT in a chain, this should point
 *                   to an instance of ::mbedtls_x509_crt initialized through
 *                   mbedtls_x509_crt_init().
 * \param buf        The buffer holding the DER encoded certificate.
 * \param buflen     The size in Bytes of \p buf.
 * \param make_copy  When not zero this function makes an internal copy of the
 *                   CRT buffer \p buf. In particular, \p buf may be destroyed
 *                   or reused after this call returns.
 *                   When zero this function avoids duplicating the CRT buffer
 *                   by taking temporary ownership thereof until the CRT
 *                   is destroyed (like mbedtls_x509_crt_parse_der_nocopy())
 * \param cb         A callback invoked for every unsupported certificate
 *                   extension.
 * \param p_ctx      An opaque context passed to the callback.
 *
 * \note             This call is functionally equivalent to
 *                   mbedtls_x509_crt_parse_der(), and/or
 *                   mbedtls_x509_crt_parse_der_nocopy()
 *                   but it calls the callback with every unsupported
 *                   certificate extension and additionally the
 *                   "certificate policies" extension if it contains any
 *                   unsupported certificate policies.
 *                   The callback must return a negative error code if it
 *                   does not know how to handle such an extension.
 *                   When the callback fails to parse a critical extension
 *                   mbedtls_x509_crt_parse_der_with_ext_cb() also fails.
 *                   When the callback fails to parse a non critical extension
 *                   mbedtls_x509_crt_parse_der_with_ext_cb() simply skips
 *                   the extension and continues parsing.
 *                   Future versions of the library may invoke the callback
 *                   in other cases, if and when the need arises.
 *
 * \return           \c 0 if successful.
 * \return           A negative error code on failure.
 */
int mbedtls_x509_crt_parse_der_with_ext_cb( mbedtls_x509_crt *chain,
                                            const unsigned char *buf,
                                            size_t buflen,
                                            int make_copy,
                                            mbedtls_x509_crt_ext_cb_t cb,
                                            void *p_ctx );

/**
 * \brief          Parse a single DER formatted certificate and add it
 *                 to the end of the provided chained list. This is a
 *                 variant of mbedtls_x509_crt_parse_der() which takes
 *                 temporary ownership of the CRT buffer until the CRT
 *                 is destroyed.
 *
 * \param chain    The pointer to the start of the CRT chain to attach to.
 *                 When parsing the first CRT in a chain, this should point
 *                 to an instance of ::mbedtls_x509_crt initialized through
 *                 mbedtls_x509_crt_init().
 * \param buf      The address of the readable buffer holding the DER encoded
 *                 certificate to use. On success, this buffer must be
 *                 retained and not be changed for the liftetime of the
 *                 CRT chain \p chain, that is, until \p chain is destroyed
 *                 through a call to mbedtls_x509_crt_free().
 * \param buflen   The size in Bytes of \p buf.
 *
 * \note           This call is functionally equivalent to
 *                 mbedtls_x509_crt_parse_der(), but it avoids creating a
 *                 copy of the input buffer at the cost of stronger lifetime
 *                 constraints. This is useful in constrained environments
 *                 where duplication of the CRT cannot be tolerated.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_x509_crt_parse_der_nocopy( mbedtls_x509_crt *chain,
                                       const unsigned char *buf,
                                       size_t buflen );

/**
 * \brief          Parse one DER-encoded or one or more concatenated PEM-encoded
 *                 certificates and add them to the chained list.
 *
 *                 For CRTs in PEM encoding, the function parses permissively:
 *                 if at least one certificate can be parsed, the function
 *                 returns the number of certificates for which parsing failed
 *                 (hence \c 0 if all certificates were parsed successfully).
 *                 If no certificate could be parsed, the function returns
 *                 the first (negative) error encountered during parsing.
 *
 *                 PEM encoded certificates may be interleaved by other data
 *                 such as human readable descriptions of their content, as
 *                 long as the certificates are enclosed in the PEM specific
 *                 '-----{BEGIN/END} CERTIFICATE-----' delimiters.
 *
 * \param chain    The chain to which to add the parsed certificates.
 * \param buf      The buffer holding the certificate data in PEM or DER format.
 *                 For certificates in PEM encoding, this may be a concatenation
 *                 of multiple certificates; for DER encoding, the buffer must
 *                 comprise exactly one certificate.
 * \param buflen   The size of \p buf, including the terminating \c NULL byte
 *                 in case of PEM encoded data.
 *
 * \return         \c 0 if all certificates were parsed successfully.
 * \return         The (positive) number of certificates that couldn't
 *                 be parsed if parsing was partly successful (see above).
 * \return         A negative X509 or PEM error code otherwise.
 *
 */
int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, size_t buflen );

#if defined(MBEDTLS_FS_IO)
/**
 * \brief          Load one or more certificates and add them
 *                 to the chained list. Parses permissively. If some
 *                 certificates can be parsed, the result is the number
 *                 of failed certificates it encountered. If none complete
 *                 correctly, the first error is returned.
 *
 * \param chain    points to the start of the chain
 * \param path     filename to read the certificates from
 *
 * \return         0 if all certificates parsed successfully, a positive number
 *                 if partly successful or a specific X509 or PEM error code
 */
int mbedtls_x509_crt_parse_file( mbedtls_x509_crt *chain, const char *path );

/**
 * \brief          Load one or more certificate files from a path and add them
 *                 to the chained list. Parses permissively. If some
 *                 certificates can be parsed, the result is the number
 *                 of failed certificates it encountered. If none complete
 *                 correctly, the first error is returned.
 *
 * \param chain    points to the start of the chain
 * \param path     directory / folder to read the certificate files from
 *
 * \return         0 if all certificates parsed successfully, a positive number
 *                 if partly successful or a specific X509 or PEM error code
 */
int mbedtls_x509_crt_parse_path( mbedtls_x509_crt *chain, const char *path );

#endif /* MBEDTLS_FS_IO */
/**
 * \brief          This function parses an item in the SubjectAlternativeNames
 *                 extension.
 *
 * \param san_buf  The buffer holding the raw data item of the subject
 *                 alternative name.
 * \param san      The target structure to populate with the parsed presentation
 *                 of the subject alternative name encoded in \p san_raw.
 *
 * \note           Only "dnsName" and "otherName" of type hardware_module_name
 *                 as defined in RFC 4180 is supported.
 *
 * \note           This function should be called on a single raw data of
 *                 subject alternative name. For example, after successful
 *                 certificate parsing, one must iterate on every item in the
 *                 \p crt->subject_alt_names sequence, and pass it to
 *                 this function.
 *
 * \warning        The target structure contains pointers to the raw data of the
 *                 parsed certificate, and its lifetime is restricted by the
 *                 lifetime of the certificate.
 *
 * \return         \c 0 on success
 * \return         #MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE for an unsupported
 *                 SAN type.
 * \return         Another negative value for any other failure.
 */
int mbedtls_x509_parse_subject_alt_name( const mbedtls_x509_buf *san_buf,
                                         mbedtls_x509_subject_alternative_name *san );
/**
 * \brief          Returns an informational string about the
 *                 certificate.
 *
 * \param buf      Buffer to write to
 * \param size     Maximum size of buffer
 * \param prefix   A line prefix
 * \param crt      The X509 certificate to represent
 *
 * \return         The length of the string written (not including the
 *                 terminated nul byte), or a negative error code.
 */
int mbedtls_x509_crt_info( char *buf, size_t size, const char *prefix,
                   const mbedtls_x509_crt *crt );

/**
 * \brief          Returns an informational string about the
 *                 verification status of a certificate.
 *
 * \param buf      Buffer to write to
 * \param size     Maximum size of buffer
 * \param prefix   A line prefix
 * \param flags    Verification flags created by mbedtls_x509_crt_verify()
 *
 * \return         The length of the string written (not including the
 *                 terminated nul byte), or a negative error code.
 */
int mbedtls_x509_crt_verify_info( char *buf, size_t size, const char *prefix,
                          uint32_t flags );

/**
 * \brief          Verify a chain of certificates.
 *
 *                 The verify callback is a user-supplied callback that
 *                 can clear / modify / add flags for a certificate. If set,
 *                 the verification callback is called for each
 *                 certificate in the chain (from the trust-ca down to the
 *                 presented crt). The parameters for the callback are:
 *                 (void *parameter, mbedtls_x509_crt *crt, int certificate_depth,
 *                 int *flags). With the flags representing current flags for
 *                 that specific certificate and the certificate depth from
 *                 the bottom (Peer cert depth = 0).
 *
 *                 All flags left after returning from the callback
 *                 are also returned to the application. The function should
 *                 return 0 for anything (including invalid certificates)
 *                 other than fatal error, as a non-zero return code
 *                 immediately aborts the verification process. For fatal
 *                 errors, a specific error code should be used (different
 *                 from MBEDTLS_ERR_X509_CERT_VERIFY_FAILED which should not
 *                 be returned at this point), or MBEDTLS_ERR_X509_FATAL_ERROR
 *                 can be used if no better code is available.
 *
 * \note           In case verification failed, the results can be displayed
 *                 using \c mbedtls_x509_crt_verify_info()
 *
 * \note           Same as \c mbedtls_x509_crt_verify_with_profile() with the
 *                 default security profile.
 *
 * \note           It is your responsibility to provide up-to-date CRLs for
 *                 all trusted CAs. If no CRL is provided for the CA that was
 *                 used to sign the certificate, CRL verification is skipped
 *                 silently, that is *without* setting any flag.
 *
 * \note           The \c trust_ca list can contain two types of certificates:
 *                 (1) those of trusted root CAs, so that certificates
 *                 chaining up to those CAs will be trusted, and (2)
 *                 self-signed end-entity certificates to be trusted (for
 *                 specific peers you know) - in that case, the self-signed
 *                 certificate doesn't need to have the CA bit set.
 *
 * \param crt      The certificate chain to be verified.
 * \param trust_ca The list of trusted CAs.
 * \param ca_crl   The list of CRLs for trusted CAs.
 * \param cn       The expected Common Name. This will be checked to be
 *                 present in the certificate's subjectAltNames extension or,
 *                 if this extension is absent, as a CN component in its
 *                 Subject name. Currently only DNS names are supported. This
 *                 may be \c NULL if the CN need not be verified.
 * \param flags    The address at which to store the result of the verification.
 *                 If the verification couldn't be completed, the flag value is
 *                 set to (uint32_t) -1.
 * \param f_vrfy   The verification callback to use. See the documentation
 *                 of mbedtls_x509_crt_verify() for more information.
 * \param p_vrfy   The context to be passed to \p f_vrfy.
 *
 * \return         \c 0 if the chain is valid with respect to the
 *                 passed CN, CAs, CRLs and security profile.
 * \return         #MBEDTLS_ERR_X509_CERT_VERIFY_FAILED in case the
 *                 certificate chain verification failed. In this case,
 *                 \c *flags will have one or more
 *                 \c MBEDTLS_X509_BADCERT_XXX or \c MBEDTLS_X509_BADCRL_XXX
 *                 flags set.
 * \return         Another negative error code in case of a fatal error
 *                 encountered during the verification process.
 */
int mbedtls_x509_crt_verify( mbedtls_x509_crt *crt,
                     mbedtls_x509_crt *trust_ca,
                     mbedtls_x509_crl *ca_crl,
                     const char *cn, uint32_t *flags,
                     int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
                     void *p_vrfy );

/**
 * \brief          Verify a chain of certificates with respect to
 *                 a configurable security profile.
 *
 * \note           Same as \c mbedtls_x509_crt_verify(), but with explicit
 *                 security profile.
 *
 * \note           The restrictions on keys (RSA minimum size, allowed curves
 *                 for ECDSA) apply to all certificates: trusted root,
 *                 intermediate CAs if any, and end entity certificate.
 *
 * \param crt      The certificate chain to be verified.
 * \param trust_ca The list of trusted CAs.
 * \param ca_crl   The list of CRLs for trusted CAs.
 * \param profile  The security profile to use for the verification.
 * \param cn       The expected Common Name. This may be \c NULL if the
 *                 CN need not be verified.
 * \param flags    The address at which to store the result of the verification.
 *                 If the verification couldn't be completed, the flag value is
 *                 set to (uint32_t) -1.
 * \param f_vrfy   The verification callback to use. See the documentation
 *                 of mbedtls_x509_crt_verify() for more information.
 * \param p_vrfy   The context to be passed to \p f_vrfy.
 *
 * \return         \c 0 if the chain is valid with respect to the
 *                 passed CN, CAs, CRLs and security profile.
 * \return         #MBEDTLS_ERR_X509_CERT_VERIFY_FAILED in case the
 *                 certificate chain verification failed. In this case,
 *                 \c *flags will have one or more
 *                 \c MBEDTLS_X509_BADCERT_XXX or \c MBEDTLS_X509_BADCRL_XXX
 *                 flags set.
 * \return         Another negative error code in case of a fatal error
 *                 encountered during the verification process.
 */
int mbedtls_x509_crt_verify_with_profile( mbedtls_x509_crt *crt,
                     mbedtls_x509_crt *trust_ca,
                     mbedtls_x509_crl *ca_crl,
                     const mbedtls_x509_crt_profile *profile,
                     const char *cn, uint32_t *flags,
                     int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
                     void *p_vrfy );

/**
 * \brief          Restartable version of \c mbedtls_crt_verify_with_profile()
 *
 * \note           Performs the same job as \c mbedtls_crt_verify_with_profile()
 *                 but can return early and restart according to the limit
 *                 set with \c mbedtls_ecp_set_max_ops() to reduce blocking.
 *
 * \param crt      The certificate chain to be verified.
 * \param trust_ca The list of trusted CAs.
 * \param ca_crl   The list of CRLs for trusted CAs.
 * \param profile  The security profile to use for the verification.
 * \param cn       The expected Common Name. This may be \c NULL if the
 *                 CN need not be verified.
 * \param flags    The address at which to store the result of the verification.
 *                 If the verification couldn't be completed, the flag value is
 *                 set to (uint32_t) -1.
 * \param f_vrfy   The verification callback to use. See the documentation
 *                 of mbedtls_x509_crt_verify() for more information.
 * \param p_vrfy   The context to be passed to \p f_vrfy.
 * \param rs_ctx   The restart context to use. This may be set to \c NULL
 *                 to disable restartable ECC.
 *
 * \return         See \c mbedtls_crt_verify_with_profile(), or
 * \return         #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                 operations was reached: see \c mbedtls_ecp_set_max_ops().
 */
int mbedtls_x509_crt_verify_restartable( mbedtls_x509_crt *crt,
                     mbedtls_x509_crt *trust_ca,
                     mbedtls_x509_crl *ca_crl,
                     const mbedtls_x509_crt_profile *profile,
                     const char *cn, uint32_t *flags,
                     int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
                     void *p_vrfy,
                     mbedtls_x509_crt_restart_ctx *rs_ctx );

/**
 * \brief               The type of trusted certificate callbacks.
 *
 *                      Callbacks of this type are passed to and used by the CRT
 *                      verification routine mbedtls_x509_crt_verify_with_ca_cb()
 *                      when looking for trusted signers of a given certificate.
 *
 *                      On success, the callback returns a list of trusted
 *                      certificates to be considered as potential signers
 *                      for the input certificate.
 *
 * \param p_ctx         An opaque context passed to the callback.
 * \param child         The certificate for which to search a potential signer.
 *                      This will point to a readable certificate.
 * \param candidate_cas The address at which to store the address of the first
 *                      entry in the generated linked list of candidate signers.
 *                      This will not be \c NULL.
 *
 * \note                The callback must only return a non-zero value on a
 *                      fatal error. If, in contrast, the search for a potential
 *                      signer completes without a single candidate, the
 *                      callback must return \c 0 and set \c *candidate_cas
 *                      to \c NULL.
 *
 * \return              \c 0 on success. In this case, \c *candidate_cas points
 *                      to a heap-allocated linked list of instances of
 *                      ::mbedtls_x509_crt, and ownership of this list is passed
 *                      to the caller.
 * \return              A negative error code on failure.
 */
typedef int (*mbedtls_x509_crt_ca_cb_t)( void *p_ctx,
                                         mbedtls_x509_crt const *child,
                                         mbedtls_x509_crt **candidate_cas );

#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
/**
 * \brief          Version of \c mbedtls_x509_crt_verify_with_profile() which
 *                 uses a callback to acquire the list of trusted CA
 *                 certificates.
 *
 * \param crt      The certificate chain to be verified.
 * \param f_ca_cb  The callback to be used to query for potential signers
 *                 of a given child certificate. See the documentation of
 *                 ::mbedtls_x509_crt_ca_cb_t for more information.
 * \param p_ca_cb  The opaque context to be passed to \p f_ca_cb.
 * \param profile  The security profile for the verification.
 * \param cn       The expected Common Name. This may be \c NULL if the
 *                 CN need not be verified.
 * \param flags    The address at which to store the result of the verification.
 *                 If the verification couldn't be completed, the flag value is
 *                 set to (uint32_t) -1.
 * \param f_vrfy   The verification callback to use. See the documentation
 *                 of mbedtls_x509_crt_verify() for more information.
 * \param p_vrfy   The context to be passed to \p f_vrfy.
 *
 * \return         See \c mbedtls_crt_verify_with_profile().
 */
int mbedtls_x509_crt_verify_with_ca_cb( mbedtls_x509_crt *crt,
                     mbedtls_x509_crt_ca_cb_t f_ca_cb,
                     void *p_ca_cb,
                     const mbedtls_x509_crt_profile *profile,
                     const char *cn, uint32_t *flags,
                     int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
                     void *p_vrfy );

#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */

#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
/**
 * \brief          Check usage of certificate against keyUsage extension.
 *
 * \param crt      Leaf certificate used.
 * \param usage    Intended usage(s) (eg MBEDTLS_X509_KU_KEY_ENCIPHERMENT
 *                 before using the certificate to perform an RSA key
 *                 exchange).
 *
 * \note           Except for decipherOnly and encipherOnly, a bit set in the
 *                 usage argument means this bit MUST be set in the
 *                 certificate. For decipherOnly and encipherOnly, it means
 *                 that bit MAY be set.
 *
 * \return         0 is these uses of the certificate are allowed,
 *                 MBEDTLS_ERR_X509_BAD_INPUT_DATA if the keyUsage extension
 *                 is present but does not match the usage argument.
 *
 * \note           You should only call this function on leaf certificates, on
 *                 (intermediate) CAs the keyUsage extension is automatically
 *                 checked by \c mbedtls_x509_crt_verify().
 */
int mbedtls_x509_crt_check_key_usage( const mbedtls_x509_crt *crt,
                                      unsigned int usage );
#endif /* MBEDTLS_X509_CHECK_KEY_USAGE) */

#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
/**
 * \brief           Check usage of certificate against extendedKeyUsage.
 *
 * \param crt       Leaf certificate used.
 * \param usage_oid Intended usage (eg MBEDTLS_OID_SERVER_AUTH or
 *                  MBEDTLS_OID_CLIENT_AUTH).
 * \param usage_len Length of usage_oid (eg given by MBEDTLS_OID_SIZE()).
 *
 * \return          0 if this use of the certificate is allowed,
 *                  MBEDTLS_ERR_X509_BAD_INPUT_DATA if not.
 *
 * \note            Usually only makes sense on leaf certificates.
 */
int mbedtls_x509_crt_check_extended_key_usage( const mbedtls_x509_crt *crt,
                                               const char *usage_oid,
                                               size_t usage_len );
#endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */

#if defined(MBEDTLS_X509_CRL_PARSE_C)
/**
 * \brief          Verify the certificate revocation status
 *
 * \param crt      a certificate to be verified
 * \param crl      the CRL to verify against
 *
 * \return         1 if the certificate is revoked, 0 otherwise
 *
 */
int mbedtls_x509_crt_is_revoked( const mbedtls_x509_crt *crt, const mbedtls_x509_crl *crl );
#endif /* MBEDTLS_X509_CRL_PARSE_C */

/**
 * \brief          Initialize a certificate (chain)
 *
 * \param crt      Certificate chain to initialize
 */
void mbedtls_x509_crt_init( mbedtls_x509_crt *crt );

/**
 * \brief          Unallocate all certificate data
 *
 * \param crt      Certificate chain to free
 */
void mbedtls_x509_crt_free( mbedtls_x509_crt *crt );

#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
/**
 * \brief           Initialize a restart context
 */
void mbedtls_x509_crt_restart_init( mbedtls_x509_crt_restart_ctx *ctx );

/**
 * \brief           Free the components of a restart context
 */
void mbedtls_x509_crt_restart_free( mbedtls_x509_crt_restart_ctx *ctx );
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
#endif /* MBEDTLS_X509_CRT_PARSE_C */

/* \} name */
/* \} addtogroup x509_module */

#if defined(MBEDTLS_X509_CRT_WRITE_C)
/**
 * \brief           Initialize a CRT writing context
 *
 * \param ctx       CRT context to initialize
 */
void mbedtls_x509write_crt_init( mbedtls_x509write_cert *ctx );

/**
 * \brief           Set the verion for a Certificate
 *                  Default: MBEDTLS_X509_CRT_VERSION_3
 *
 * \param ctx       CRT context to use
 * \param version   version to set (MBEDTLS_X509_CRT_VERSION_1, MBEDTLS_X509_CRT_VERSION_2 or
 *                                  MBEDTLS_X509_CRT_VERSION_3)
 */
void mbedtls_x509write_crt_set_version( mbedtls_x509write_cert *ctx, int version );

/**
 * \brief           Set the serial number for a Certificate.
 *
 * \param ctx       CRT context to use
 * \param serial    serial number to set
 *
 * \return          0 if successful
 */
int mbedtls_x509write_crt_set_serial( mbedtls_x509write_cert *ctx, const mbedtls_mpi *serial );

/**
 * \brief           Set the validity period for a Certificate
 *                  Timestamps should be in string format for UTC timezone
 *                  i.e. "YYYYMMDDhhmmss"
 *                  e.g. "20131231235959" for December 31st 2013
 *                       at 23:59:59
 *
 * \param ctx       CRT context to use
 * \param not_before    not_before timestamp
 * \param not_after     not_after timestamp
 *
 * \return          0 if timestamp was parsed successfully, or
 *                  a specific error code
 */
int mbedtls_x509write_crt_set_validity( mbedtls_x509write_cert *ctx, const char *not_before,
                                const char *not_after );

/**
 * \brief           Set the issuer name for a Certificate
 *                  Issuer names should contain a comma-separated list
 *                  of OID types and values:
 *                  e.g. "C=UK,O=ARM,CN=mbed TLS CA"
 *
 * \param ctx           CRT context to use
 * \param issuer_name   issuer name to set
 *
 * \return          0 if issuer name was parsed successfully, or
 *                  a specific error code
 */
int mbedtls_x509write_crt_set_issuer_name( mbedtls_x509write_cert *ctx,
                                   const char *issuer_name );

/**
 * \brief           Set the subject name for a Certificate
 *                  Subject names should contain a comma-separated list
 *                  of OID types and values:
 *                  e.g. "C=UK,O=ARM,CN=mbed TLS Server 1"
 *
 * \param ctx           CRT context to use
 * \param subject_name  subject name to set
 *
 * \return          0 if subject name was parsed successfully, or
 *                  a specific error code
 */
int mbedtls_x509write_crt_set_subject_name( mbedtls_x509write_cert *ctx,
                                    const char *subject_name );

/**
 * \brief           Set the subject public key for the certificate
 *
 * \param ctx       CRT context to use
 * \param key       public key to include
 */
void mbedtls_x509write_crt_set_subject_key( mbedtls_x509write_cert *ctx, mbedtls_pk_context *key );

/**
 * \brief           Set the issuer key used for signing the certificate
 *
 * \param ctx       CRT context to use
 * \param key       private key to sign with
 */
void mbedtls_x509write_crt_set_issuer_key( mbedtls_x509write_cert *ctx, mbedtls_pk_context *key );

/**
 * \brief           Set the MD algorithm to use for the signature
 *                  (e.g. MBEDTLS_MD_SHA1)
 *
 * \param ctx       CRT context to use
 * \param md_alg    MD algorithm to use
 */
void mbedtls_x509write_crt_set_md_alg( mbedtls_x509write_cert *ctx, mbedtls_md_type_t md_alg );

/**
 * \brief           Generic function to add to or replace an extension in the
 *                  CRT
 *
 * \param ctx       CRT context to use
 * \param oid       OID of the extension
 * \param oid_len   length of the OID
 * \param critical  if the extension is critical (per the RFC's definition)
 * \param val       value of the extension OCTET STRING
 * \param val_len   length of the value data
 *
 * \return          0 if successful, or a MBEDTLS_ERR_X509_ALLOC_FAILED
 */
int mbedtls_x509write_crt_set_extension( mbedtls_x509write_cert *ctx,
                                 const char *oid, size_t oid_len,
                                 int critical,
                                 const unsigned char *val, size_t val_len );

/**
 * \brief           Set the basicConstraints extension for a CRT
 *
 * \param ctx       CRT context to use
 * \param is_ca     is this a CA certificate
 * \param max_pathlen   maximum length of certificate chains below this
 *                      certificate (only for CA certificates, -1 is
 *                      inlimited)
 *
 * \return          0 if successful, or a MBEDTLS_ERR_X509_ALLOC_FAILED
 */
int mbedtls_x509write_crt_set_basic_constraints( mbedtls_x509write_cert *ctx,
                                         int is_ca, int max_pathlen );

#if defined(MBEDTLS_SHA1_C)
/**
 * \brief           Set the subjectKeyIdentifier extension for a CRT
 *                  Requires that mbedtls_x509write_crt_set_subject_key() has been
 *                  called before
 *
 * \param ctx       CRT context to use
 *
 * \return          0 if successful, or a MBEDTLS_ERR_X509_ALLOC_FAILED
 */
int mbedtls_x509write_crt_set_subject_key_identifier( mbedtls_x509write_cert *ctx );

/**
 * \brief           Set the authorityKeyIdentifier extension for a CRT
 *                  Requires that mbedtls_x509write_crt_set_issuer_key() has been
 *                  called before
 *
 * \param ctx       CRT context to use
 *
 * \return          0 if successful, or a MBEDTLS_ERR_X509_ALLOC_FAILED
 */
int mbedtls_x509write_crt_set_authority_key_identifier( mbedtls_x509write_cert *ctx );
#endif /* MBEDTLS_SHA1_C */

/**
 * \brief           Set the Key Usage Extension flags
 *                  (e.g. MBEDTLS_X509_KU_DIGITAL_SIGNATURE | MBEDTLS_X509_KU_KEY_CERT_SIGN)
 *
 * \param ctx       CRT context to use
 * \param key_usage key usage flags to set
 *
 * \return          0 if successful, or MBEDTLS_ERR_X509_ALLOC_FAILED
 */
int mbedtls_x509write_crt_set_key_usage( mbedtls_x509write_cert *ctx,
                                         unsigned int key_usage );

/**
 * \brief           Set the Netscape Cert Type flags
 *                  (e.g. MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT | MBEDTLS_X509_NS_CERT_TYPE_EMAIL)
 *
 * \param ctx           CRT context to use
 * \param ns_cert_type  Netscape Cert Type flags to set
 *
 * \return          0 if successful, or MBEDTLS_ERR_X509_ALLOC_FAILED
 */
int mbedtls_x509write_crt_set_ns_cert_type( mbedtls_x509write_cert *ctx,
                                    unsigned char ns_cert_type );

/**
 * \brief           Free the contents of a CRT write context
 *
 * \param ctx       CRT context to free
 */
void mbedtls_x509write_crt_free( mbedtls_x509write_cert *ctx );

/**
 * \brief           Write a built up certificate to a X509 DER structure
 *                  Note: data is written at the end of the buffer! Use the
 *                        return value to determine where you should start
 *                        using the buffer
 *
 * \param ctx       certificate to write away
 * \param buf       buffer to write to
 * \param size      size of the buffer
 * \param f_rng     RNG function (for signature, see note)
 * \param p_rng     RNG parameter
 *
 * \return          length of data written if successful, or a specific
 *                  error code
 *
 * \note            f_rng may be NULL if RSA is used for signature and the
 *                  signature is made offline (otherwise f_rng is desirable
 *                  for countermeasures against timing attacks).
 *                  ECDSA signatures always require a non-NULL f_rng.
 */
int mbedtls_x509write_crt_der( mbedtls_x509write_cert *ctx, unsigned char *buf, size_t size,
                       int (*f_rng)(void *, unsigned char *, size_t),
                       void *p_rng );

#if defined(MBEDTLS_PEM_WRITE_C)
/**
 * \brief           Write a built up certificate to a X509 PEM string
 *
 * \param ctx       certificate to write away
 * \param buf       buffer to write to
 * \param size      size of the buffer
 * \param f_rng     RNG function (for signature, see note)
 * \param p_rng     RNG parameter
 *
 * \return          0 if successful, or a specific error code
 *
 * \note            f_rng may be NULL if RSA is used for signature and the
 *                  signature is made offline (otherwise f_rng is desirable
 *                  for countermeasures against timing attacks).
 *                  ECDSA signatures always require a non-NULL f_rng.
 */
int mbedtls_x509write_crt_pem( mbedtls_x509write_cert *ctx, unsigned char *buf, size_t size,
                       int (*f_rng)(void *, unsigned char *, size_t),
                       void *p_rng );
#endif /* MBEDTLS_PEM_WRITE_C */
#endif /* MBEDTLS_X509_CRT_WRITE_C */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_x509_crt.h */


/********* Start of file include/mbedtls/x509_csr.h ************/

/**
 * \file x509_csr.h
 *
 * \brief X.509 certificate signing request parsing and writing
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_X509_CSR_H
#define MBEDTLS_X509_CSR_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#ifdef __cplusplus
extern "C" {
#endif

/**
 * \addtogroup x509_module
 * \{ */

/**
 * \name Structures and functions for X.509 Certificate Signing Requests (CSR)
 * \{
 */

/**
 * Certificate Signing Request (CSR) structure.
 */
typedef struct mbedtls_x509_csr
{
    mbedtls_x509_buf raw;           /**< The raw CSR data (DER). */
    mbedtls_x509_buf cri;           /**< The raw CertificateRequestInfo body (DER). */

    int version;            /**< CSR version (1=v1). */

    mbedtls_x509_buf  subject_raw;  /**< The raw subject data (DER). */
    mbedtls_x509_name subject;      /**< The parsed subject data (named information object). */

    mbedtls_pk_context pk;          /**< Container for the public key context. */

    mbedtls_x509_buf sig_oid;
    mbedtls_x509_buf sig;
    mbedtls_md_type_t sig_md;       /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
    mbedtls_pk_type_t sig_pk;       /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
    void *sig_opts;         /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */
}
mbedtls_x509_csr;

/**
 * Container for writing a CSR
 */
typedef struct mbedtls_x509write_csr
{
    mbedtls_pk_context *key;
    mbedtls_asn1_named_data *subject;
    mbedtls_md_type_t md_alg;
    mbedtls_asn1_named_data *extensions;
}
mbedtls_x509write_csr;

#if defined(MBEDTLS_X509_CSR_PARSE_C)
/**
 * \brief          Load a Certificate Signing Request (CSR) in DER format
 *
 * \note           CSR attributes (if any) are currently silently ignored.
 *
 * \param csr      CSR context to fill
 * \param buf      buffer holding the CRL data
 * \param buflen   size of the buffer
 *
 * \return         0 if successful, or a specific X509 error code
 */
int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
                        const unsigned char *buf, size_t buflen );

/**
 * \brief          Load a Certificate Signing Request (CSR), DER or PEM format
 *
 * \note           See notes for \c mbedtls_x509_csr_parse_der()
 *
 * \param csr      CSR context to fill
 * \param buf      buffer holding the CRL data
 * \param buflen   size of the buffer
 *                 (including the terminating null byte for PEM data)
 *
 * \return         0 if successful, or a specific X509 or PEM error code
 */
int mbedtls_x509_csr_parse( mbedtls_x509_csr *csr, const unsigned char *buf, size_t buflen );

#if defined(MBEDTLS_FS_IO)
/**
 * \brief          Load a Certificate Signing Request (CSR)
 *
 * \note           See notes for \c mbedtls_x509_csr_parse()
 *
 * \param csr      CSR context to fill
 * \param path     filename to read the CSR from
 *
 * \return         0 if successful, or a specific X509 or PEM error code
 */
int mbedtls_x509_csr_parse_file( mbedtls_x509_csr *csr, const char *path );
#endif /* MBEDTLS_FS_IO */

/**
 * \brief          Returns an informational string about the
 *                 CSR.
 *
 * \param buf      Buffer to write to
 * \param size     Maximum size of buffer
 * \param prefix   A line prefix
 * \param csr      The X509 CSR to represent
 *
 * \return         The length of the string written (not including the
 *                 terminated nul byte), or a negative error code.
 */
int mbedtls_x509_csr_info( char *buf, size_t size, const char *prefix,
                   const mbedtls_x509_csr *csr );

/**
 * \brief          Initialize a CSR
 *
 * \param csr      CSR to initialize
 */
void mbedtls_x509_csr_init( mbedtls_x509_csr *csr );

/**
 * \brief          Unallocate all CSR data
 *
 * \param csr      CSR to free
 */
void mbedtls_x509_csr_free( mbedtls_x509_csr *csr );
#endif /* MBEDTLS_X509_CSR_PARSE_C */

/* \} name */
/* \} addtogroup x509_module */

#if defined(MBEDTLS_X509_CSR_WRITE_C)
/**
 * \brief           Initialize a CSR context
 *
 * \param ctx       CSR context to initialize
 */
void mbedtls_x509write_csr_init( mbedtls_x509write_csr *ctx );

/**
 * \brief           Set the subject name for a CSR
 *                  Subject names should contain a comma-separated list
 *                  of OID types and values:
 *                  e.g. "C=UK,O=ARM,CN=mbed TLS Server 1"
 *
 * \param ctx           CSR context to use
 * \param subject_name  subject name to set
 *
 * \return          0 if subject name was parsed successfully, or
 *                  a specific error code
 */
int mbedtls_x509write_csr_set_subject_name( mbedtls_x509write_csr *ctx,
                                    const char *subject_name );

/**
 * \brief           Set the key for a CSR (public key will be included,
 *                  private key used to sign the CSR when writing it)
 *
 * \param ctx       CSR context to use
 * \param key       Asymetric key to include
 */
void mbedtls_x509write_csr_set_key( mbedtls_x509write_csr *ctx, mbedtls_pk_context *key );

/**
 * \brief           Set the MD algorithm to use for the signature
 *                  (e.g. MBEDTLS_MD_SHA1)
 *
 * \param ctx       CSR context to use
 * \param md_alg    MD algorithm to use
 */
void mbedtls_x509write_csr_set_md_alg( mbedtls_x509write_csr *ctx, mbedtls_md_type_t md_alg );

/**
 * \brief           Set the Key Usage Extension flags
 *                  (e.g. MBEDTLS_X509_KU_DIGITAL_SIGNATURE | MBEDTLS_X509_KU_KEY_CERT_SIGN)
 *
 * \param ctx       CSR context to use
 * \param key_usage key usage flags to set
 *
 * \return          0 if successful, or MBEDTLS_ERR_X509_ALLOC_FAILED
 *
 * \note            The <code>decipherOnly</code> flag from the Key Usage
 *                  extension is represented by bit 8 (i.e.
 *                  <code>0x8000</code>), which cannot typically be represented
 *                  in an unsigned char. Therefore, the flag
 *                  <code>decipherOnly</code> (i.e.
 *                  #MBEDTLS_X509_KU_DECIPHER_ONLY) cannot be set using this
 *                  function.
 */
int mbedtls_x509write_csr_set_key_usage( mbedtls_x509write_csr *ctx, unsigned char key_usage );

/**
 * \brief           Set the Netscape Cert Type flags
 *                  (e.g. MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT | MBEDTLS_X509_NS_CERT_TYPE_EMAIL)
 *
 * \param ctx           CSR context to use
 * \param ns_cert_type  Netscape Cert Type flags to set
 *
 * \return          0 if successful, or MBEDTLS_ERR_X509_ALLOC_FAILED
 */
int mbedtls_x509write_csr_set_ns_cert_type( mbedtls_x509write_csr *ctx,
                                    unsigned char ns_cert_type );

/**
 * \brief           Generic function to add to or replace an extension in the
 *                  CSR
 *
 * \param ctx       CSR context to use
 * \param oid       OID of the extension
 * \param oid_len   length of the OID
 * \param val       value of the extension OCTET STRING
 * \param val_len   length of the value data
 *
 * \return          0 if successful, or a MBEDTLS_ERR_X509_ALLOC_FAILED
 */
int mbedtls_x509write_csr_set_extension( mbedtls_x509write_csr *ctx,
                                 const char *oid, size_t oid_len,
                                 const unsigned char *val, size_t val_len );

/**
 * \brief           Free the contents of a CSR context
 *
 * \param ctx       CSR context to free
 */
void mbedtls_x509write_csr_free( mbedtls_x509write_csr *ctx );

/**
 * \brief           Write a CSR (Certificate Signing Request) to a
 *                  DER structure
 *                  Note: data is written at the end of the buffer! Use the
 *                        return value to determine where you should start
 *                        using the buffer
 *
 * \param ctx       CSR to write away
 * \param buf       buffer to write to
 * \param size      size of the buffer
 * \param f_rng     RNG function (for signature, see note)
 * \param p_rng     RNG parameter
 *
 * \return          length of data written if successful, or a specific
 *                  error code
 *
 * \note            f_rng may be NULL if RSA is used for signature and the
 *                  signature is made offline (otherwise f_rng is desirable
 *                  for countermeasures against timing attacks).
 *                  ECDSA signatures always require a non-NULL f_rng.
 */
int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
                       int (*f_rng)(void *, unsigned char *, size_t),
                       void *p_rng );

#if defined(MBEDTLS_PEM_WRITE_C)
/**
 * \brief           Write a CSR (Certificate Signing Request) to a
 *                  PEM string
 *
 * \param ctx       CSR to write away
 * \param buf       buffer to write to
 * \param size      size of the buffer
 * \param f_rng     RNG function (for signature, see note)
 * \param p_rng     RNG parameter
 *
 * \return          0 if successful, or a specific error code
 *
 * \note            f_rng may be NULL if RSA is used for signature and the
 *                  signature is made offline (otherwise f_rng is desirable
 *                  for countermeasures against timing attacks).
 *                  ECDSA signatures always require a non-NULL f_rng.
 */
int mbedtls_x509write_csr_pem( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
                       int (*f_rng)(void *, unsigned char *, size_t),
                       void *p_rng );
#endif /* MBEDTLS_PEM_WRITE_C */
#endif /* MBEDTLS_X509_CSR_WRITE_C */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_x509_csr.h */


/********* Start of file include/mbedtls/cipher.h ************/

/**
 * \file cipher.h
 *
 * \brief This file contains an abstraction interface for use with the cipher
 * primitives provided by the library. It provides a common interface to all of
 * the available cipher operations.
 *
 * \author Adriaan de Jong <dejong@fox-it.com>
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_CIPHER_H
#define MBEDTLS_CIPHER_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>


#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
#define MBEDTLS_CIPHER_MODE_AEAD
#endif

#if defined(MBEDTLS_CIPHER_MODE_CBC)
#define MBEDTLS_CIPHER_MODE_WITH_PADDING
#endif

#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER) || \
    defined(MBEDTLS_CHACHA20_C)
#define MBEDTLS_CIPHER_MODE_STREAM
#endif

#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
    !defined(inline) && !defined(__cplusplus)
#define inline __inline
#endif

/** The selected feature is not available. */
#define MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE  -0x6080
/** Bad input parameters. */
#define MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA       -0x6100
/** Failed to allocate memory. */
#define MBEDTLS_ERR_CIPHER_ALLOC_FAILED         -0x6180
/** Input data contains invalid padding and is rejected. */
#define MBEDTLS_ERR_CIPHER_INVALID_PADDING      -0x6200
/** Decryption of block requires a full block. */
#define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED  -0x6280
/** Authentication failed (for AEAD modes). */
#define MBEDTLS_ERR_CIPHER_AUTH_FAILED          -0x6300
/** The context is invalid. For example, because it was freed. */
#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT      -0x6380

/* MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED is deprecated and should not be used. */
/** Cipher hardware accelerator failed. */
#define MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED      -0x6400

#define MBEDTLS_CIPHER_VARIABLE_IV_LEN     0x01    /**< Cipher accepts IVs of variable length. */
#define MBEDTLS_CIPHER_VARIABLE_KEY_LEN    0x02    /**< Cipher accepts keys of variable length. */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief     Supported cipher types.
 *
 * \warning   RC4 and DES are considered weak ciphers and their use
 *            constitutes a security risk. Arm recommends considering stronger
 *            ciphers instead.
 */
typedef enum {
    MBEDTLS_CIPHER_ID_NONE = 0,  /**< Placeholder to mark the end of cipher ID lists. */
    MBEDTLS_CIPHER_ID_NULL,      /**< The identity cipher, treated as a stream cipher. */
    MBEDTLS_CIPHER_ID_AES,       /**< The AES cipher. */
    MBEDTLS_CIPHER_ID_DES,       /**< The DES cipher. */
    MBEDTLS_CIPHER_ID_3DES,      /**< The Triple DES cipher. */
    MBEDTLS_CIPHER_ID_CAMELLIA,  /**< The Camellia cipher. */
    MBEDTLS_CIPHER_ID_BLOWFISH,  /**< The Blowfish cipher. */
    MBEDTLS_CIPHER_ID_ARC4,      /**< The RC4 cipher. */
    MBEDTLS_CIPHER_ID_ARIA,      /**< The Aria cipher. */
    MBEDTLS_CIPHER_ID_CHACHA20,  /**< The ChaCha20 cipher. */
} mbedtls_cipher_id_t;

/**
 * \brief     Supported {cipher type, cipher mode} pairs.
 *
 * \warning   RC4 and DES are considered weak ciphers and their use
 *            constitutes a security risk. Arm recommends considering stronger
 *            ciphers instead.
 */
typedef enum {
    MBEDTLS_CIPHER_NONE = 0,             /**< Placeholder to mark the end of cipher-pair lists. */
    MBEDTLS_CIPHER_NULL,                 /**< The identity stream cipher. */
    MBEDTLS_CIPHER_AES_128_ECB,          /**< AES cipher with 128-bit ECB mode. */
    MBEDTLS_CIPHER_AES_192_ECB,          /**< AES cipher with 192-bit ECB mode. */
    MBEDTLS_CIPHER_AES_256_ECB,          /**< AES cipher with 256-bit ECB mode. */
    MBEDTLS_CIPHER_AES_128_CBC,          /**< AES cipher with 128-bit CBC mode. */
    MBEDTLS_CIPHER_AES_192_CBC,          /**< AES cipher with 192-bit CBC mode. */
    MBEDTLS_CIPHER_AES_256_CBC,          /**< AES cipher with 256-bit CBC mode. */
    MBEDTLS_CIPHER_AES_128_CFB128,       /**< AES cipher with 128-bit CFB128 mode. */
    MBEDTLS_CIPHER_AES_192_CFB128,       /**< AES cipher with 192-bit CFB128 mode. */
    MBEDTLS_CIPHER_AES_256_CFB128,       /**< AES cipher with 256-bit CFB128 mode. */
    MBEDTLS_CIPHER_AES_128_CTR,          /**< AES cipher with 128-bit CTR mode. */
    MBEDTLS_CIPHER_AES_192_CTR,          /**< AES cipher with 192-bit CTR mode. */
    MBEDTLS_CIPHER_AES_256_CTR,          /**< AES cipher with 256-bit CTR mode. */
    MBEDTLS_CIPHER_AES_128_GCM,          /**< AES cipher with 128-bit GCM mode. */
    MBEDTLS_CIPHER_AES_192_GCM,          /**< AES cipher with 192-bit GCM mode. */
    MBEDTLS_CIPHER_AES_256_GCM,          /**< AES cipher with 256-bit GCM mode. */
    MBEDTLS_CIPHER_CAMELLIA_128_ECB,     /**< Camellia cipher with 128-bit ECB mode. */
    MBEDTLS_CIPHER_CAMELLIA_192_ECB,     /**< Camellia cipher with 192-bit ECB mode. */
    MBEDTLS_CIPHER_CAMELLIA_256_ECB,     /**< Camellia cipher with 256-bit ECB mode. */
    MBEDTLS_CIPHER_CAMELLIA_128_CBC,     /**< Camellia cipher with 128-bit CBC mode. */
    MBEDTLS_CIPHER_CAMELLIA_192_CBC,     /**< Camellia cipher with 192-bit CBC mode. */
    MBEDTLS_CIPHER_CAMELLIA_256_CBC,     /**< Camellia cipher with 256-bit CBC mode. */
    MBEDTLS_CIPHER_CAMELLIA_128_CFB128,  /**< Camellia cipher with 128-bit CFB128 mode. */
    MBEDTLS_CIPHER_CAMELLIA_192_CFB128,  /**< Camellia cipher with 192-bit CFB128 mode. */
    MBEDTLS_CIPHER_CAMELLIA_256_CFB128,  /**< Camellia cipher with 256-bit CFB128 mode. */
    MBEDTLS_CIPHER_CAMELLIA_128_CTR,     /**< Camellia cipher with 128-bit CTR mode. */
    MBEDTLS_CIPHER_CAMELLIA_192_CTR,     /**< Camellia cipher with 192-bit CTR mode. */
    MBEDTLS_CIPHER_CAMELLIA_256_CTR,     /**< Camellia cipher with 256-bit CTR mode. */
    MBEDTLS_CIPHER_CAMELLIA_128_GCM,     /**< Camellia cipher with 128-bit GCM mode. */
    MBEDTLS_CIPHER_CAMELLIA_192_GCM,     /**< Camellia cipher with 192-bit GCM mode. */
    MBEDTLS_CIPHER_CAMELLIA_256_GCM,     /**< Camellia cipher with 256-bit GCM mode. */
    MBEDTLS_CIPHER_DES_ECB,              /**< DES cipher with ECB mode. */
    MBEDTLS_CIPHER_DES_CBC,              /**< DES cipher with CBC mode. */
    MBEDTLS_CIPHER_DES_EDE_ECB,          /**< DES cipher with EDE ECB mode. */
    MBEDTLS_CIPHER_DES_EDE_CBC,          /**< DES cipher with EDE CBC mode. */
    MBEDTLS_CIPHER_DES_EDE3_ECB,         /**< DES cipher with EDE3 ECB mode. */
    MBEDTLS_CIPHER_DES_EDE3_CBC,         /**< DES cipher with EDE3 CBC mode. */
    MBEDTLS_CIPHER_BLOWFISH_ECB,         /**< Blowfish cipher with ECB mode. */
    MBEDTLS_CIPHER_BLOWFISH_CBC,         /**< Blowfish cipher with CBC mode. */
    MBEDTLS_CIPHER_BLOWFISH_CFB64,       /**< Blowfish cipher with CFB64 mode. */
    MBEDTLS_CIPHER_BLOWFISH_CTR,         /**< Blowfish cipher with CTR mode. */
    MBEDTLS_CIPHER_ARC4_128,             /**< RC4 cipher with 128-bit mode. */
    MBEDTLS_CIPHER_AES_128_CCM,          /**< AES cipher with 128-bit CCM mode. */
    MBEDTLS_CIPHER_AES_192_CCM,          /**< AES cipher with 192-bit CCM mode. */
    MBEDTLS_CIPHER_AES_256_CCM,          /**< AES cipher with 256-bit CCM mode. */
    MBEDTLS_CIPHER_CAMELLIA_128_CCM,     /**< Camellia cipher with 128-bit CCM mode. */
    MBEDTLS_CIPHER_CAMELLIA_192_CCM,     /**< Camellia cipher with 192-bit CCM mode. */
    MBEDTLS_CIPHER_CAMELLIA_256_CCM,     /**< Camellia cipher with 256-bit CCM mode. */
    MBEDTLS_CIPHER_ARIA_128_ECB,         /**< Aria cipher with 128-bit key and ECB mode. */
    MBEDTLS_CIPHER_ARIA_192_ECB,         /**< Aria cipher with 192-bit key and ECB mode. */
    MBEDTLS_CIPHER_ARIA_256_ECB,         /**< Aria cipher with 256-bit key and ECB mode. */
    MBEDTLS_CIPHER_ARIA_128_CBC,         /**< Aria cipher with 128-bit key and CBC mode. */
    MBEDTLS_CIPHER_ARIA_192_CBC,         /**< Aria cipher with 192-bit key and CBC mode. */
    MBEDTLS_CIPHER_ARIA_256_CBC,         /**< Aria cipher with 256-bit key and CBC mode. */
    MBEDTLS_CIPHER_ARIA_128_CFB128,      /**< Aria cipher with 128-bit key and CFB-128 mode. */
    MBEDTLS_CIPHER_ARIA_192_CFB128,      /**< Aria cipher with 192-bit key and CFB-128 mode. */
    MBEDTLS_CIPHER_ARIA_256_CFB128,      /**< Aria cipher with 256-bit key and CFB-128 mode. */
    MBEDTLS_CIPHER_ARIA_128_CTR,         /**< Aria cipher with 128-bit key and CTR mode. */
    MBEDTLS_CIPHER_ARIA_192_CTR,         /**< Aria cipher with 192-bit key and CTR mode. */
    MBEDTLS_CIPHER_ARIA_256_CTR,         /**< Aria cipher with 256-bit key and CTR mode. */
    MBEDTLS_CIPHER_ARIA_128_GCM,         /**< Aria cipher with 128-bit key and GCM mode. */
    MBEDTLS_CIPHER_ARIA_192_GCM,         /**< Aria cipher with 192-bit key and GCM mode. */
    MBEDTLS_CIPHER_ARIA_256_GCM,         /**< Aria cipher with 256-bit key and GCM mode. */
    MBEDTLS_CIPHER_ARIA_128_CCM,         /**< Aria cipher with 128-bit key and CCM mode. */
    MBEDTLS_CIPHER_ARIA_192_CCM,         /**< Aria cipher with 192-bit key and CCM mode. */
    MBEDTLS_CIPHER_ARIA_256_CCM,         /**< Aria cipher with 256-bit key and CCM mode. */
    MBEDTLS_CIPHER_AES_128_OFB,          /**< AES 128-bit cipher in OFB mode. */
    MBEDTLS_CIPHER_AES_192_OFB,          /**< AES 192-bit cipher in OFB mode. */
    MBEDTLS_CIPHER_AES_256_OFB,          /**< AES 256-bit cipher in OFB mode. */
    MBEDTLS_CIPHER_AES_128_XTS,          /**< AES 128-bit cipher in XTS block mode. */
    MBEDTLS_CIPHER_AES_256_XTS,          /**< AES 256-bit cipher in XTS block mode. */
    MBEDTLS_CIPHER_CHACHA20,             /**< ChaCha20 stream cipher. */
    MBEDTLS_CIPHER_CHACHA20_POLY1305,    /**< ChaCha20-Poly1305 AEAD cipher. */
    MBEDTLS_CIPHER_AES_128_KW,           /**< AES cipher with 128-bit NIST KW mode. */
    MBEDTLS_CIPHER_AES_192_KW,           /**< AES cipher with 192-bit NIST KW mode. */
    MBEDTLS_CIPHER_AES_256_KW,           /**< AES cipher with 256-bit NIST KW mode. */
    MBEDTLS_CIPHER_AES_128_KWP,          /**< AES cipher with 128-bit NIST KWP mode. */
    MBEDTLS_CIPHER_AES_192_KWP,          /**< AES cipher with 192-bit NIST KWP mode. */
    MBEDTLS_CIPHER_AES_256_KWP,          /**< AES cipher with 256-bit NIST KWP mode. */
} mbedtls_cipher_type_t;

/** Supported cipher modes. */
typedef enum {
    MBEDTLS_MODE_NONE = 0,               /**< None.                        */
    MBEDTLS_MODE_ECB,                    /**< The ECB cipher mode.         */
    MBEDTLS_MODE_CBC,                    /**< The CBC cipher mode.         */
    MBEDTLS_MODE_CFB,                    /**< The CFB cipher mode.         */
    MBEDTLS_MODE_OFB,                    /**< The OFB cipher mode.         */
    MBEDTLS_MODE_CTR,                    /**< The CTR cipher mode.         */
    MBEDTLS_MODE_GCM,                    /**< The GCM cipher mode.         */
    MBEDTLS_MODE_STREAM,                 /**< The stream cipher mode.      */
    MBEDTLS_MODE_CCM,                    /**< The CCM cipher mode.         */
    MBEDTLS_MODE_XTS,                    /**< The XTS cipher mode.         */
    MBEDTLS_MODE_CHACHAPOLY,             /**< The ChaCha-Poly cipher mode. */
    MBEDTLS_MODE_KW,                     /**< The SP800-38F KW mode */
    MBEDTLS_MODE_KWP,                    /**< The SP800-38F KWP mode */
} mbedtls_cipher_mode_t;

/** Supported cipher padding types. */
typedef enum {
    MBEDTLS_PADDING_PKCS7 = 0,     /**< PKCS7 padding (default).        */
    MBEDTLS_PADDING_ONE_AND_ZEROS, /**< ISO/IEC 7816-4 padding.         */
    MBEDTLS_PADDING_ZEROS_AND_LEN, /**< ANSI X.923 padding.             */
    MBEDTLS_PADDING_ZEROS,         /**< Zero padding (not reversible). */
    MBEDTLS_PADDING_NONE,          /**< Never pad (full blocks only).   */
} mbedtls_cipher_padding_t;

/** Type of operation. */
typedef enum {
    MBEDTLS_OPERATION_NONE = -1,
    MBEDTLS_DECRYPT = 0,
    MBEDTLS_ENCRYPT,
} mbedtls_operation_t;

enum {
    /** Undefined key length. */
    MBEDTLS_KEY_LENGTH_NONE = 0,
    /** Key length, in bits (including parity), for DES keys. */
    MBEDTLS_KEY_LENGTH_DES  = 64,
    /** Key length in bits, including parity, for DES in two-key EDE. */
    MBEDTLS_KEY_LENGTH_DES_EDE = 128,
    /** Key length in bits, including parity, for DES in three-key EDE. */
    MBEDTLS_KEY_LENGTH_DES_EDE3 = 192,
};

/** Maximum length of any IV, in Bytes. */
/* This should ideally be derived automatically from list of ciphers.
 * This should be kept in sync with MBEDTLS_SSL_MAX_IV_LENGTH defined
 * in ssl_internal.h. */
#define MBEDTLS_MAX_IV_LENGTH      16

/** Maximum block size of any cipher, in Bytes. */
/* This should ideally be derived automatically from list of ciphers.
 * This should be kept in sync with MBEDTLS_SSL_MAX_BLOCK_LENGTH defined
 * in ssl_internal.h. */
#define MBEDTLS_MAX_BLOCK_LENGTH   16

/** Maximum key length, in Bytes. */
/* This should ideally be derived automatically from list of ciphers.
 * For now, only check whether XTS is enabled which uses 64 Byte keys,
 * and use 32 Bytes as an upper bound for the maximum key length otherwise.
 * This should be kept in sync with MBEDTLS_SSL_MAX_BLOCK_LENGTH defined
 * in ssl_internal.h, which however deliberately ignores the case of XTS
 * since the latter isn't used in SSL/TLS. */
#if defined(MBEDTLS_CIPHER_MODE_XTS)
#define MBEDTLS_MAX_KEY_LENGTH     64
#else
#define MBEDTLS_MAX_KEY_LENGTH     32
#endif /* MBEDTLS_CIPHER_MODE_XTS */

/**
 * Base cipher information (opaque struct).
 */
typedef struct mbedtls_cipher_base_t mbedtls_cipher_base_t;

/**
 * CMAC context (opaque struct).
 */
typedef struct mbedtls_cmac_context_t mbedtls_cmac_context_t;

/**
 * Cipher information. Allows calling cipher functions
 * in a generic way.
 */
typedef struct mbedtls_cipher_info_t
{
    /** Full cipher identifier. For example,
     * MBEDTLS_CIPHER_AES_256_CBC.
     */
    mbedtls_cipher_type_t type;

    /** The cipher mode. For example, MBEDTLS_MODE_CBC. */
    mbedtls_cipher_mode_t mode;

    /** The cipher key length, in bits. This is the
     * default length for variable sized ciphers.
     * Includes parity bits for ciphers like DES.
     */
    unsigned int key_bitlen;

    /** Name of the cipher. */
    const char * name;

    /** IV or nonce size, in Bytes.
     * For ciphers that accept variable IV sizes,
     * this is the recommended size.
     */
    unsigned int iv_size;

    /** Bitflag comprised of MBEDTLS_CIPHER_VARIABLE_IV_LEN and
     *  MBEDTLS_CIPHER_VARIABLE_KEY_LEN indicating whether the
     *  cipher supports variable IV or variable key sizes, respectively.
     */
    int flags;

    /** The block size, in Bytes. */
    unsigned int block_size;

    /** Struct for base cipher information and functions. */
    const mbedtls_cipher_base_t *base;

} mbedtls_cipher_info_t;

/**
 * Generic cipher context.
 */
typedef struct mbedtls_cipher_context_t
{
    /** Information about the associated cipher. */
    const mbedtls_cipher_info_t *cipher_info;

    /** Key length to use. */
    int key_bitlen;

    /** Operation that the key of the context has been
     * initialized for.
     */
    mbedtls_operation_t operation;

#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
    /** Padding functions to use, if relevant for
     * the specific cipher mode.
     */
    void (*add_padding)( unsigned char *output, size_t olen, size_t data_len );
    int (*get_padding)( unsigned char *input, size_t ilen, size_t *data_len );
#endif

    /** Buffer for input that has not been processed yet. */
    unsigned char unprocessed_data[MBEDTLS_MAX_BLOCK_LENGTH];

    /** Number of Bytes that have not been processed yet. */
    size_t unprocessed_len;

    /** Current IV or NONCE_COUNTER for CTR-mode, data unit (or sector) number
     * for XTS-mode. */
    unsigned char iv[MBEDTLS_MAX_IV_LENGTH];

    /** IV size in Bytes, for ciphers with variable-length IVs. */
    size_t iv_size;

    /** The cipher-specific context. */
    void *cipher_ctx;

#if defined(MBEDTLS_CMAC_C)
    /** CMAC-specific context. */
    mbedtls_cmac_context_t *cmac_ctx;
#endif

#if defined(MBEDTLS_USE_PSA_CRYPTO)
    /** Indicates whether the cipher operations should be performed
     *  by Mbed TLS' own crypto library or an external implementation
     *  of the PSA Crypto API.
     *  This is unset if the cipher context was established through
     *  mbedtls_cipher_setup(), and set if it was established through
     *  mbedtls_cipher_setup_psa().
     */
    unsigned char psa_enabled;
#endif /* MBEDTLS_USE_PSA_CRYPTO */

} mbedtls_cipher_context_t;

/**
 * \brief This function retrieves the list of ciphers supported
 *        by the generic cipher module.
 *
 *        For any cipher identifier in the returned list, you can
 *        obtain the corresponding generic cipher information structure
 *        via mbedtls_cipher_info_from_type(), which can then be used
 *        to prepare a cipher context via mbedtls_cipher_setup().
 *
 *
 * \return      A statically-allocated array of cipher identifiers
 *              of type cipher_type_t. The last entry is zero.
 */
const int *mbedtls_cipher_list( void );

/**
 * \brief               This function retrieves the cipher-information
 *                      structure associated with the given cipher name.
 *
 * \param cipher_name   Name of the cipher to search for. This must not be
 *                      \c NULL.
 *
 * \return              The cipher information structure associated with the
 *                      given \p cipher_name.
 * \return              \c NULL if the associated cipher information is not found.
 */
const mbedtls_cipher_info_t *mbedtls_cipher_info_from_string( const char *cipher_name );

/**
 * \brief               This function retrieves the cipher-information
 *                      structure associated with the given cipher type.
 *
 * \param cipher_type   Type of the cipher to search for.
 *
 * \return              The cipher information structure associated with the
 *                      given \p cipher_type.
 * \return              \c NULL if the associated cipher information is not found.
 */
const mbedtls_cipher_info_t *mbedtls_cipher_info_from_type( const mbedtls_cipher_type_t cipher_type );

/**
 * \brief               This function retrieves the cipher-information
 *                      structure associated with the given cipher ID,
 *                      key size and mode.
 *
 * \param cipher_id     The ID of the cipher to search for. For example,
 *                      #MBEDTLS_CIPHER_ID_AES.
 * \param key_bitlen    The length of the key in bits.
 * \param mode          The cipher mode. For example, #MBEDTLS_MODE_CBC.
 *
 * \return              The cipher information structure associated with the
 *                      given \p cipher_id.
 * \return              \c NULL if the associated cipher information is not found.
 */
const mbedtls_cipher_info_t *mbedtls_cipher_info_from_values( const mbedtls_cipher_id_t cipher_id,
                                              int key_bitlen,
                                              const mbedtls_cipher_mode_t mode );

/**
 * \brief               This function initializes a \p cipher_context as NONE.
 *
 * \param ctx           The context to be initialized. This must not be \c NULL.
 */
void mbedtls_cipher_init( mbedtls_cipher_context_t *ctx );

/**
 * \brief               This function frees and clears the cipher-specific
 *                      context of \p ctx. Freeing \p ctx itself remains the
 *                      responsibility of the caller.
 *
 * \param ctx           The context to be freed. If this is \c NULL, the
 *                      function has no effect, otherwise this must point to an
 *                      initialized context.
 */
void mbedtls_cipher_free( mbedtls_cipher_context_t *ctx );


/**
 * \brief               This function initializes a cipher context for
 *                      use with the given cipher primitive.
 *
 * \param ctx           The context to initialize. This must be initialized.
 * \param cipher_info   The cipher to use.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              #MBEDTLS_ERR_CIPHER_ALLOC_FAILED if allocation of the
 *                      cipher-specific context fails.
 *
 * \internal Currently, the function also clears the structure.
 * In future versions, the caller will be required to call
 * mbedtls_cipher_init() on the structure first.
 */
int mbedtls_cipher_setup( mbedtls_cipher_context_t *ctx,
                          const mbedtls_cipher_info_t *cipher_info );

#if defined(MBEDTLS_USE_PSA_CRYPTO)
/**
 * \brief               This function initializes a cipher context for
 *                      PSA-based use with the given cipher primitive.
 *
 * \note                See #MBEDTLS_USE_PSA_CRYPTO for information on PSA.
 *
 * \param ctx           The context to initialize. May not be \c NULL.
 * \param cipher_info   The cipher to use.
 * \param taglen        For AEAD ciphers, the length in bytes of the
 *                      authentication tag to use. Subsequent uses of
 *                      mbedtls_cipher_auth_encrypt() or
 *                      mbedtls_cipher_auth_decrypt() must provide
 *                      the same tag length.
 *                      For non-AEAD ciphers, the value must be \c 0.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              #MBEDTLS_ERR_CIPHER_ALLOC_FAILED if allocation of the
 *                      cipher-specific context fails.
 */
int mbedtls_cipher_setup_psa( mbedtls_cipher_context_t *ctx,
                              const mbedtls_cipher_info_t *cipher_info,
                              size_t taglen );
#endif /* MBEDTLS_USE_PSA_CRYPTO */

/**
 * \brief        This function returns the block size of the given cipher.
 *
 * \param ctx    The context of the cipher. This must be initialized.
 *
 * \return       The block size of the underlying cipher.
 * \return       \c 0 if \p ctx has not been initialized.
 */
static inline unsigned int mbedtls_cipher_get_block_size(
    const mbedtls_cipher_context_t *ctx )
{
    MBEDTLS_INTERNAL_VALIDATE_RET( ctx != NULL, 0 );
    if( ctx->cipher_info == NULL )
        return 0;

    return ctx->cipher_info->block_size;
}

/**
 * \brief        This function returns the mode of operation for
 *               the cipher. For example, MBEDTLS_MODE_CBC.
 *
 * \param ctx    The context of the cipher. This must be initialized.
 *
 * \return       The mode of operation.
 * \return       #MBEDTLS_MODE_NONE if \p ctx has not been initialized.
 */
static inline mbedtls_cipher_mode_t mbedtls_cipher_get_cipher_mode(
    const mbedtls_cipher_context_t *ctx )
{
    MBEDTLS_INTERNAL_VALIDATE_RET( ctx != NULL, MBEDTLS_MODE_NONE );
    if( ctx->cipher_info == NULL )
        return MBEDTLS_MODE_NONE;

    return ctx->cipher_info->mode;
}

/**
 * \brief       This function returns the size of the IV or nonce
 *              of the cipher, in Bytes.
 *
 * \param ctx   The context of the cipher. This must be initialized.
 *
 * \return      The recommended IV size if no IV has been set.
 * \return      \c 0 for ciphers not using an IV or a nonce.
 * \return      The actual size if an IV has been set.
 */
static inline int mbedtls_cipher_get_iv_size(
    const mbedtls_cipher_context_t *ctx )
{
    MBEDTLS_INTERNAL_VALIDATE_RET( ctx != NULL, 0 );
    if( ctx->cipher_info == NULL )
        return 0;

    if( ctx->iv_size != 0 )
        return (int) ctx->iv_size;

    return (int) ctx->cipher_info->iv_size;
}

/**
 * \brief               This function returns the type of the given cipher.
 *
 * \param ctx           The context of the cipher. This must be initialized.
 *
 * \return              The type of the cipher.
 * \return              #MBEDTLS_CIPHER_NONE if \p ctx has not been initialized.
 */
static inline mbedtls_cipher_type_t mbedtls_cipher_get_type(
    const mbedtls_cipher_context_t *ctx )
{
    MBEDTLS_INTERNAL_VALIDATE_RET(
        ctx != NULL, MBEDTLS_CIPHER_NONE );
    if( ctx->cipher_info == NULL )
        return MBEDTLS_CIPHER_NONE;

    return ctx->cipher_info->type;
}

/**
 * \brief               This function returns the name of the given cipher
 *                      as a string.
 *
 * \param ctx           The context of the cipher. This must be initialized.
 *
 * \return              The name of the cipher.
 * \return              NULL if \p ctx has not been not initialized.
 */
static inline const char *mbedtls_cipher_get_name(
    const mbedtls_cipher_context_t *ctx )
{
    MBEDTLS_INTERNAL_VALIDATE_RET( ctx != NULL, 0 );
    if( ctx->cipher_info == NULL )
        return 0;

    return ctx->cipher_info->name;
}

/**
 * \brief               This function returns the key length of the cipher.
 *
 * \param ctx           The context of the cipher. This must be initialized.
 *
 * \return              The key length of the cipher in bits.
 * \return              #MBEDTLS_KEY_LENGTH_NONE if ctx \p has not been
 *                      initialized.
 */
static inline int mbedtls_cipher_get_key_bitlen(
    const mbedtls_cipher_context_t *ctx )
{
    MBEDTLS_INTERNAL_VALIDATE_RET(
        ctx != NULL, MBEDTLS_KEY_LENGTH_NONE );
    if( ctx->cipher_info == NULL )
        return MBEDTLS_KEY_LENGTH_NONE;

    return (int) ctx->cipher_info->key_bitlen;
}

/**
 * \brief          This function returns the operation of the given cipher.
 *
 * \param ctx      The context of the cipher. This must be initialized.
 *
 * \return         The type of operation: #MBEDTLS_ENCRYPT or #MBEDTLS_DECRYPT.
 * \return         #MBEDTLS_OPERATION_NONE if \p ctx has not been initialized.
 */
static inline mbedtls_operation_t mbedtls_cipher_get_operation(
    const mbedtls_cipher_context_t *ctx )
{
    MBEDTLS_INTERNAL_VALIDATE_RET(
        ctx != NULL, MBEDTLS_OPERATION_NONE );
    if( ctx->cipher_info == NULL )
        return MBEDTLS_OPERATION_NONE;

    return ctx->operation;
}

/**
 * \brief               This function sets the key to use with the given context.
 *
 * \param ctx           The generic cipher context. This must be initialized and
 *                      bound to a cipher information structure.
 * \param key           The key to use. This must be a readable buffer of at
 *                      least \p key_bitlen Bits.
 * \param key_bitlen    The key length to use, in Bits.
 * \param operation     The operation that the key will be used for:
 *                      #MBEDTLS_ENCRYPT or #MBEDTLS_DECRYPT.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              A cipher-specific error code on failure.
 */
int mbedtls_cipher_setkey( mbedtls_cipher_context_t *ctx,
                           const unsigned char *key,
                           int key_bitlen,
                           const mbedtls_operation_t operation );

#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
/**
 * \brief               This function sets the padding mode, for cipher modes
 *                      that use padding.
 *
 *                      The default passing mode is PKCS7 padding.
 *
 * \param ctx           The generic cipher context. This must be initialized and
 *                      bound to a cipher information structure.
 * \param mode          The padding mode.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE
 *                      if the selected padding mode is not supported.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA if the cipher mode
 *                      does not support padding.
 */
int mbedtls_cipher_set_padding_mode( mbedtls_cipher_context_t *ctx,
                                     mbedtls_cipher_padding_t mode );
#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */

/**
 * \brief           This function sets the initialization vector (IV)
 *                  or nonce.
 *
 * \note            Some ciphers do not use IVs nor nonce. For these
 *                  ciphers, this function has no effect.
 *
 * \param ctx       The generic cipher context. This must be initialized and
 *                  bound to a cipher information structure.
 * \param iv        The IV to use, or NONCE_COUNTER for CTR-mode ciphers. This
 *                  must be a readable buffer of at least \p iv_len Bytes.
 * \param iv_len    The IV length for ciphers with variable-size IV.
 *                  This parameter is discarded by ciphers with fixed-size IV.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                  parameter-verification failure.
 */
int mbedtls_cipher_set_iv( mbedtls_cipher_context_t *ctx,
                           const unsigned char *iv,
                           size_t iv_len );

/**
 * \brief         This function resets the cipher state.
 *
 * \param ctx     The generic cipher context. This must be initialized.
 *
 * \return        \c 0 on success.
 * \return        #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                parameter-verification failure.
 */
int mbedtls_cipher_reset( mbedtls_cipher_context_t *ctx );

#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
/**
 * \brief               This function adds additional data for AEAD ciphers.
 *                      Currently supported with GCM and ChaCha20+Poly1305.
 *                      This must be called exactly once, after
 *                      mbedtls_cipher_reset().
 *
 * \param ctx           The generic cipher context. This must be initialized.
 * \param ad            The additional data to use. This must be a readable
 *                      buffer of at least \p ad_len Bytes.
 * \param ad_len        The length of \p ad in Bytes.
 *
 * \return              \c 0 on success.
 * \return              A specific error code on failure.
 */
int mbedtls_cipher_update_ad( mbedtls_cipher_context_t *ctx,
                      const unsigned char *ad, size_t ad_len );
#endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */

/**
 * \brief               The generic cipher update function. It encrypts or
 *                      decrypts using the given cipher context. Writes as
 *                      many block-sized blocks of data as possible to output.
 *                      Any data that cannot be written immediately is either
 *                      added to the next block, or flushed when
 *                      mbedtls_cipher_finish() is called.
 *                      Exception: For MBEDTLS_MODE_ECB, expects a single block
 *                      in size. For example, 16 Bytes for AES.
 *
 * \note                If the underlying cipher is used in GCM mode, all calls
 *                      to this function, except for the last one before
 *                      mbedtls_cipher_finish(), must have \p ilen as a
 *                      multiple of the block size of the cipher.
 *
 * \param ctx           The generic cipher context. This must be initialized and
 *                      bound to a key.
 * \param input         The buffer holding the input data. This must be a
 *                      readable buffer of at least \p ilen Bytes.
 * \param ilen          The length of the input data.
 * \param output        The buffer for the output data. This must be able to
 *                      hold at least `ilen + block_size`. This must not be the
 *                      same buffer as \p input.
 * \param olen          The length of the output data, to be updated with the
 *                      actual number of Bytes written. This must not be
 *                      \c NULL.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              #MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE on an
 *                      unsupported mode for a cipher.
 * \return              A cipher-specific error code on failure.
 */
int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx,
                           const unsigned char *input,
                           size_t ilen, unsigned char *output,
                           size_t *olen );

/**
 * \brief               The generic cipher finalization function. If data still
 *                      needs to be flushed from an incomplete block, the data
 *                      contained in it is padded to the size of
 *                      the last block, and written to the \p output buffer.
 *
 * \param ctx           The generic cipher context. This must be initialized and
 *                      bound to a key.
 * \param output        The buffer to write data to. This needs to be a writable
 *                      buffer of at least \p block_size Bytes.
 * \param olen          The length of the data written to the \p output buffer.
 *                      This may not be \c NULL.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              #MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED on decryption
 *                      expecting a full block but not receiving one.
 * \return              #MBEDTLS_ERR_CIPHER_INVALID_PADDING on invalid padding
 *                      while decrypting.
 * \return              A cipher-specific error code on failure.
 */
int mbedtls_cipher_finish( mbedtls_cipher_context_t *ctx,
                   unsigned char *output, size_t *olen );

#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
/**
 * \brief               This function writes a tag for AEAD ciphers.
 *                      Currently supported with GCM and ChaCha20+Poly1305.
 *                      This must be called after mbedtls_cipher_finish().
 *
 * \param ctx           The generic cipher context. This must be initialized,
 *                      bound to a key, and have just completed a cipher
 *                      operation through mbedtls_cipher_finish() the tag for
 *                      which should be written.
 * \param tag           The buffer to write the tag to. This must be a writable
 *                      buffer of at least \p tag_len Bytes.
 * \param tag_len       The length of the tag to write.
 *
 * \return              \c 0 on success.
 * \return              A specific error code on failure.
 */
int mbedtls_cipher_write_tag( mbedtls_cipher_context_t *ctx,
                      unsigned char *tag, size_t tag_len );

/**
 * \brief               This function checks the tag for AEAD ciphers.
 *                      Currently supported with GCM and ChaCha20+Poly1305.
 *                      This must be called after mbedtls_cipher_finish().
 *
 * \param ctx           The generic cipher context. This must be initialized.
 * \param tag           The buffer holding the tag. This must be a readable
 *                      buffer of at least \p tag_len Bytes.
 * \param tag_len       The length of the tag to check.
 *
 * \return              \c 0 on success.
 * \return              A specific error code on failure.
 */
int mbedtls_cipher_check_tag( mbedtls_cipher_context_t *ctx,
                      const unsigned char *tag, size_t tag_len );
#endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */

/**
 * \brief               The generic all-in-one encryption/decryption function,
 *                      for all ciphers except AEAD constructs.
 *
 * \param ctx           The generic cipher context. This must be initialized.
 * \param iv            The IV to use, or NONCE_COUNTER for CTR-mode ciphers.
 *                      This must be a readable buffer of at least \p iv_len
 *                      Bytes.
 * \param iv_len        The IV length for ciphers with variable-size IV.
 *                      This parameter is discarded by ciphers with fixed-size
 *                      IV.
 * \param input         The buffer holding the input data. This must be a
 *                      readable buffer of at least \p ilen Bytes.
 * \param ilen          The length of the input data in Bytes.
 * \param output        The buffer for the output data. This must be able to
 *                      hold at least `ilen + block_size`. This must not be the
 *                      same buffer as \p input.
 * \param olen          The length of the output data, to be updated with the
 *                      actual number of Bytes written. This must not be
 *                      \c NULL.
 *
 * \note                Some ciphers do not use IVs nor nonce. For these
 *                      ciphers, use \p iv = NULL and \p iv_len = 0.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              #MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED on decryption
 *                      expecting a full block but not receiving one.
 * \return              #MBEDTLS_ERR_CIPHER_INVALID_PADDING on invalid padding
 *                      while decrypting.
 * \return              A cipher-specific error code on failure.
 */
int mbedtls_cipher_crypt( mbedtls_cipher_context_t *ctx,
                  const unsigned char *iv, size_t iv_len,
                  const unsigned char *input, size_t ilen,
                  unsigned char *output, size_t *olen );

#if defined(MBEDTLS_CIPHER_MODE_AEAD)
#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif /* MBEDTLS_DEPRECATED_WARNING */
/**
 * \brief               The generic authenticated encryption (AEAD) function.
 *
 * \deprecated          Superseded by mbedtls_cipher_auth_encrypt_ext().
 *
 * \note                This function only supports AEAD algorithms, not key
 *                      wrapping algorithms such as NIST_KW; for this, see
 *                      mbedtls_cipher_auth_encrypt_ext().
 *
 * \param ctx           The generic cipher context. This must be initialized and
 *                      bound to a key associated with an AEAD algorithm.
 * \param iv            The nonce to use. This must be a readable buffer of
 *                      at least \p iv_len Bytes and must not be \c NULL.
 * \param iv_len        The length of the nonce. This must satisfy the
 *                      constraints imposed by the AEAD cipher used.
 * \param ad            The additional data to authenticate. This must be a
 *                      readable buffer of at least \p ad_len Bytes, and may
 *                      be \c NULL is \p ad_len is \c 0.
 * \param ad_len        The length of \p ad.
 * \param input         The buffer holding the input data. This must be a
 *                      readable buffer of at least \p ilen Bytes, and may be
 *                      \c NULL if \p ilen is \c 0.
 * \param ilen          The length of the input data.
 * \param output        The buffer for the output data. This must be a
 *                      writable buffer of at least \p ilen Bytes, and must
 *                      not be \c NULL.
 * \param olen          This will be filled with the actual number of Bytes
 *                      written to the \p output buffer. This must point to a
 *                      writable object of type \c size_t.
 * \param tag           The buffer for the authentication tag. This must be a
 *                      writable buffer of at least \p tag_len Bytes. See note
 *                      below regarding restrictions with PSA-based contexts.
 * \param tag_len       The desired length of the authentication tag. This
 *                      must match the constraints imposed by the AEAD cipher
 *                      used, and in particular must not be \c 0.
 *
 * \note                If the context is based on PSA (that is, it was set up
 *                      with mbedtls_cipher_setup_psa()), then it is required
 *                      that \c tag == output + ilen. That is, the tag must be
 *                      appended to the ciphertext as recommended by RFC 5116.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              A cipher-specific error code on failure.
 */
int mbedtls_cipher_auth_encrypt( mbedtls_cipher_context_t *ctx,
                         const unsigned char *iv, size_t iv_len,
                         const unsigned char *ad, size_t ad_len,
                         const unsigned char *input, size_t ilen,
                         unsigned char *output, size_t *olen,
                         unsigned char *tag, size_t tag_len )
                         MBEDTLS_DEPRECATED;

/**
 * \brief               The generic authenticated decryption (AEAD) function.
 *
 * \deprecated          Superseded by mbedtls_cipher_auth_decrypt_ext().
 *
 * \note                This function only supports AEAD algorithms, not key
 *                      wrapping algorithms such as NIST_KW; for this, see
 *                      mbedtls_cipher_auth_decrypt_ext().
 *
 * \note                If the data is not authentic, then the output buffer
 *                      is zeroed out to prevent the unauthentic plaintext being
 *                      used, making this interface safer.
 *
 * \param ctx           The generic cipher context. This must be initialized and
 *                      bound to a key associated with an AEAD algorithm.
 * \param iv            The nonce to use. This must be a readable buffer of
 *                      at least \p iv_len Bytes and must not be \c NULL.
 * \param iv_len        The length of the nonce. This must satisfy the
 *                      constraints imposed by the AEAD cipher used.
 * \param ad            The additional data to authenticate. This must be a
 *                      readable buffer of at least \p ad_len Bytes, and may
 *                      be \c NULL is \p ad_len is \c 0.
 * \param ad_len        The length of \p ad.
 * \param input         The buffer holding the input data. This must be a
 *                      readable buffer of at least \p ilen Bytes, and may be
 *                      \c NULL if \p ilen is \c 0.
 * \param ilen          The length of the input data.
 * \param output        The buffer for the output data. This must be a
 *                      writable buffer of at least \p ilen Bytes, and must
 *                      not be \c NULL.
 * \param olen          This will be filled with the actual number of Bytes
 *                      written to the \p output buffer. This must point to a
 *                      writable object of type \c size_t.
 * \param tag           The buffer for the authentication tag. This must be a
 *                      readable buffer of at least \p tag_len Bytes. See note
 *                      below regarding restrictions with PSA-based contexts.
 * \param tag_len       The length of the authentication tag. This must match
 *                      the constraints imposed by the AEAD cipher used, and in
 *                      particular must not be \c 0.
 *
 * \note                If the context is based on PSA (that is, it was set up
 *                      with mbedtls_cipher_setup_psa()), then it is required
 *                      that \c tag == input + len. That is, the tag must be
 *                      appended to the ciphertext as recommended by RFC 5116.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              #MBEDTLS_ERR_CIPHER_AUTH_FAILED if data is not authentic.
 * \return              A cipher-specific error code on failure.
 */
int mbedtls_cipher_auth_decrypt( mbedtls_cipher_context_t *ctx,
                         const unsigned char *iv, size_t iv_len,
                         const unsigned char *ad, size_t ad_len,
                         const unsigned char *input, size_t ilen,
                         unsigned char *output, size_t *olen,
                         const unsigned char *tag, size_t tag_len )
                         MBEDTLS_DEPRECATED;
#undef MBEDTLS_DEPRECATED
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_CIPHER_MODE_AEAD */

#if defined(MBEDTLS_CIPHER_MODE_AEAD) || defined(MBEDTLS_NIST_KW_C)
/**
 * \brief               The authenticated encryption (AEAD/NIST_KW) function.
 *
 * \note                For AEAD modes, the tag will be appended to the
 *                      ciphertext, as recommended by RFC 5116.
 *                      (NIST_KW doesn't have a separate tag.)
 *
 * \param ctx           The generic cipher context. This must be initialized and
 *                      bound to a key, with an AEAD algorithm or NIST_KW.
 * \param iv            The nonce to use. This must be a readable buffer of
 *                      at least \p iv_len Bytes and may be \c NULL if \p
 *                      iv_len is \c 0.
 * \param iv_len        The length of the nonce. For AEAD ciphers, this must
 *                      satisfy the constraints imposed by the cipher used.
 *                      For NIST_KW, this must be \c 0.
 * \param ad            The additional data to authenticate. This must be a
 *                      readable buffer of at least \p ad_len Bytes, and may
 *                      be \c NULL is \p ad_len is \c 0.
 * \param ad_len        The length of \p ad. For NIST_KW, this must be \c 0.
 * \param input         The buffer holding the input data. This must be a
 *                      readable buffer of at least \p ilen Bytes, and may be
 *                      \c NULL if \p ilen is \c 0.
 * \param ilen          The length of the input data.
 * \param output        The buffer for the output data. This must be a
 *                      writable buffer of at least \p output_len Bytes, and
 *                      must not be \c NULL.
 * \param output_len    The length of the \p output buffer in Bytes. For AEAD
 *                      ciphers, this must be at least \p ilen + \p tag_len.
 *                      For NIST_KW, this must be at least \p ilen + 8
 *                      (rounded up to a multiple of 8 if KWP is used);
 *                      \p ilen + 15 is always a safe value.
 * \param olen          This will be filled with the actual number of Bytes
 *                      written to the \p output buffer. This must point to a
 *                      writable object of type \c size_t.
 * \param tag_len       The desired length of the authentication tag. For AEAD
 *                      ciphers, this must match the constraints imposed by
 *                      the cipher used, and in particular must not be \c 0.
 *                      For NIST_KW, this must be \c 0.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              A cipher-specific error code on failure.
 */
int mbedtls_cipher_auth_encrypt_ext( mbedtls_cipher_context_t *ctx,
                         const unsigned char *iv, size_t iv_len,
                         const unsigned char *ad, size_t ad_len,
                         const unsigned char *input, size_t ilen,
                         unsigned char *output, size_t output_len,
                         size_t *olen, size_t tag_len );

/**
 * \brief               The authenticated encryption (AEAD/NIST_KW) function.
 *
 * \note                If the data is not authentic, then the output buffer
 *                      is zeroed out to prevent the unauthentic plaintext being
 *                      used, making this interface safer.
 *
 * \note                For AEAD modes, the tag must be appended to the
 *                      ciphertext, as recommended by RFC 5116.
 *                      (NIST_KW doesn't have a separate tag.)
 *
 * \param ctx           The generic cipher context. This must be initialized and
 *                      bound to a key, with an AEAD algorithm or NIST_KW.
 * \param iv            The nonce to use. This must be a readable buffer of
 *                      at least \p iv_len Bytes and may be \c NULL if \p
 *                      iv_len is \c 0.
 * \param iv_len        The length of the nonce. For AEAD ciphers, this must
 *                      satisfy the constraints imposed by the cipher used.
 *                      For NIST_KW, this must be \c 0.
 * \param ad            The additional data to authenticate. This must be a
 *                      readable buffer of at least \p ad_len Bytes, and may
 *                      be \c NULL is \p ad_len is \c 0.
 * \param ad_len        The length of \p ad. For NIST_KW, this must be \c 0.
 * \param input         The buffer holding the input data. This must be a
 *                      readable buffer of at least \p ilen Bytes, and may be
 *                      \c NULL if \p ilen is \c 0.
 * \param ilen          The length of the input data. For AEAD ciphers this
 *                      must be at least \p tag_len. For NIST_KW this must be
 *                      at least \c 8.
 * \param output        The buffer for the output data. This must be a
 *                      writable buffer of at least \p output_len Bytes, and
 *                      may be \c NULL if \p output_len is \c 0.
 * \param output_len    The length of the \p output buffer in Bytes. For AEAD
 *                      ciphers, this must be at least \p ilen - \p tag_len.
 *                      For NIST_KW, this must be at least \p ilen - 8.
 * \param olen          This will be filled with the actual number of Bytes
 *                      written to the \p output buffer. This must point to a
 *                      writable object of type \c size_t.
 * \param tag_len       The actual length of the authentication tag. For AEAD
 *                      ciphers, this must match the constraints imposed by
 *                      the cipher used, and in particular must not be \c 0.
 *                      For NIST_KW, this must be \c 0.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on
 *                      parameter-verification failure.
 * \return              #MBEDTLS_ERR_CIPHER_AUTH_FAILED if data is not authentic.
 * \return              A cipher-specific error code on failure.
 */
int mbedtls_cipher_auth_decrypt_ext( mbedtls_cipher_context_t *ctx,
                         const unsigned char *iv, size_t iv_len,
                         const unsigned char *ad, size_t ad_len,
                         const unsigned char *input, size_t ilen,
                         unsigned char *output, size_t output_len,
                         size_t *olen, size_t tag_len );
#endif /* MBEDTLS_CIPHER_MODE_AEAD || MBEDTLS_NIST_KW_C */
#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_CIPHER_H */


/********* Start of file include/mbedtls/ssl_ciphersuites.h ************/

/**
 * \file ssl_ciphersuites.h
 *
 * \brief SSL Ciphersuites for mbed TLS
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SSL_CIPHERSUITES_H
#define MBEDTLS_SSL_CIPHERSUITES_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif





#ifdef __cplusplus
extern "C" {
#endif

/*
 * Supported ciphersuites (Official IANA names)
 */
#define MBEDTLS_TLS_RSA_WITH_NULL_MD5                    0x01   /**< Weak! */
#define MBEDTLS_TLS_RSA_WITH_NULL_SHA                    0x02   /**< Weak! */

#define MBEDTLS_TLS_RSA_WITH_RC4_128_MD5                 0x04
#define MBEDTLS_TLS_RSA_WITH_RC4_128_SHA                 0x05
#define MBEDTLS_TLS_RSA_WITH_DES_CBC_SHA                 0x09   /**< Weak! Not in TLS 1.2 */

#define MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA            0x0A

#define MBEDTLS_TLS_DHE_RSA_WITH_DES_CBC_SHA             0x15   /**< Weak! Not in TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA        0x16

#define MBEDTLS_TLS_PSK_WITH_NULL_SHA                    0x2C   /**< Weak! */
#define MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA                0x2D   /**< Weak! */
#define MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA                0x2E   /**< Weak! */
#define MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA             0x2F

#define MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA         0x33
#define MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA             0x35
#define MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA         0x39

#define MBEDTLS_TLS_RSA_WITH_NULL_SHA256                 0x3B   /**< Weak! */
#define MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256          0x3C   /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA256          0x3D   /**< TLS 1.2 */

#define MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA        0x41
#define MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA    0x45

#define MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256      0x67   /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256      0x6B   /**< TLS 1.2 */

#define MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA        0x84
#define MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA    0x88

#define MBEDTLS_TLS_PSK_WITH_RC4_128_SHA                 0x8A
#define MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA            0x8B
#define MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA             0x8C
#define MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA             0x8D

#define MBEDTLS_TLS_DHE_PSK_WITH_RC4_128_SHA             0x8E
#define MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA        0x8F
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA         0x90
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA         0x91

#define MBEDTLS_TLS_RSA_PSK_WITH_RC4_128_SHA             0x92
#define MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA        0x93
#define MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA         0x94
#define MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA         0x95

#define MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256          0x9C   /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_AES_256_GCM_SHA384          0x9D   /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256      0x9E   /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384      0x9F   /**< TLS 1.2 */

#define MBEDTLS_TLS_PSK_WITH_AES_128_GCM_SHA256          0xA8   /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_AES_256_GCM_SHA384          0xA9   /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256      0xAA   /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384      0xAB   /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256      0xAC   /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384      0xAD   /**< TLS 1.2 */

#define MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA256          0xAE
#define MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA384          0xAF
#define MBEDTLS_TLS_PSK_WITH_NULL_SHA256                 0xB0   /**< Weak! */
#define MBEDTLS_TLS_PSK_WITH_NULL_SHA384                 0xB1   /**< Weak! */

#define MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256      0xB2
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384      0xB3
#define MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA256             0xB4   /**< Weak! */
#define MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA384             0xB5   /**< Weak! */

#define MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256      0xB6
#define MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384      0xB7
#define MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA256             0xB8   /**< Weak! */
#define MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA384             0xB9   /**< Weak! */

#define MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256     0xBA   /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 0xBE   /**< TLS 1.2 */

#define MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256     0xC0   /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 0xC4   /**< TLS 1.2 */

#define MBEDTLS_TLS_ECDH_ECDSA_WITH_NULL_SHA             0xC001 /**< Weak! */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_RC4_128_SHA          0xC002 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA     0xC003 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA      0xC004 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA      0xC005 /**< Not in SSL3! */

#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_NULL_SHA            0xC006 /**< Weak! */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA         0xC007 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA    0xC008 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA     0xC009 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA     0xC00A /**< Not in SSL3! */

#define MBEDTLS_TLS_ECDH_RSA_WITH_NULL_SHA               0xC00B /**< Weak! */
#define MBEDTLS_TLS_ECDH_RSA_WITH_RC4_128_SHA            0xC00C /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA       0xC00D /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA        0xC00E /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA        0xC00F /**< Not in SSL3! */

#define MBEDTLS_TLS_ECDHE_RSA_WITH_NULL_SHA              0xC010 /**< Weak! */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_RC4_128_SHA           0xC011 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA      0xC012 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA       0xC013 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA       0xC014 /**< Not in SSL3! */

#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256  0xC023 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384  0xC024 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256   0xC025 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384   0xC026 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256    0xC027 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384    0xC028 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256     0xC029 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384     0xC02A /**< TLS 1.2 */

#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256  0xC02B /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384  0xC02C /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256   0xC02D /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384   0xC02E /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256    0xC02F /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384    0xC030 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256     0xC031 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384     0xC032 /**< TLS 1.2 */

#define MBEDTLS_TLS_ECDHE_PSK_WITH_RC4_128_SHA           0xC033 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA      0xC034 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA       0xC035 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA       0xC036 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256    0xC037 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384    0xC038 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA              0xC039 /**< Weak! No SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA256           0xC03A /**< Weak! No SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA384           0xC03B /**< Weak! No SSL3! */

#define MBEDTLS_TLS_RSA_WITH_ARIA_128_CBC_SHA256         0xC03C /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_ARIA_256_CBC_SHA384         0xC03D /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256     0xC044 /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384     0xC045 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 0xC048 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 0xC049 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256  0xC04A /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384  0xC04B /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256   0xC04C /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384   0xC04D /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256    0xC04E /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384    0xC04F /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_ARIA_128_GCM_SHA256         0xC050 /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_ARIA_256_GCM_SHA384         0xC051 /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256     0xC052 /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384     0xC053 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 0xC05C /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 0xC05D /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256  0xC05E /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384  0xC05F /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256   0xC060 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384   0xC061 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256    0xC062 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384    0xC063 /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_ARIA_128_CBC_SHA256         0xC064 /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_ARIA_256_CBC_SHA384         0xC065 /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256     0xC066 /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384     0xC067 /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256     0xC068 /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384     0xC069 /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_ARIA_128_GCM_SHA256         0xC06A /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_ARIA_256_GCM_SHA384         0xC06B /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256     0xC06C /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384     0xC06D /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256     0xC06E /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384     0xC06F /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256   0xC070 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384   0xC071 /**< TLS 1.2 */

#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 0xC072 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 0xC073 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256  0xC074 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384  0xC075 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256   0xC076 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384   0xC077 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256    0xC078 /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384    0xC079 /**< Not in SSL3! */

#define MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256         0xC07A /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384         0xC07B /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256     0xC07C /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384     0xC07D /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 0xC086 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 0xC087 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256  0xC088 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384  0xC089 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256   0xC08A /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384   0xC08B /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256    0xC08C /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384    0xC08D /**< TLS 1.2 */

#define MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256       0xC08E /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384       0xC08F /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256   0xC090 /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384   0xC091 /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256   0xC092 /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384   0xC093 /**< TLS 1.2 */

#define MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256       0xC094
#define MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384       0xC095
#define MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256   0xC096
#define MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384   0xC097
#define MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256   0xC098
#define MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384   0xC099
#define MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 0xC09A /**< Not in SSL3! */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 0xC09B /**< Not in SSL3! */

#define MBEDTLS_TLS_RSA_WITH_AES_128_CCM                0xC09C  /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_AES_256_CCM                0xC09D  /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CCM            0xC09E  /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CCM            0xC09F  /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_AES_128_CCM_8              0xC0A0  /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_WITH_AES_256_CCM_8              0xC0A1  /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CCM_8          0xC0A2  /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CCM_8          0xC0A3  /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_AES_128_CCM                0xC0A4  /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_AES_256_CCM                0xC0A5  /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CCM            0xC0A6  /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CCM            0xC0A7  /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_AES_128_CCM_8              0xC0A8  /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_AES_256_CCM_8              0xC0A9  /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CCM_8          0xC0AA  /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CCM_8          0xC0AB  /**< TLS 1.2 */
/* The last two are named with PSK_DHE in the RFC, which looks like a typo */

#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM        0xC0AC  /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CCM        0xC0AD  /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8      0xC0AE  /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8      0xC0AF  /**< TLS 1.2 */

#define MBEDTLS_TLS_ECJPAKE_WITH_AES_128_CCM_8          0xC0FF  /**< experimental */

/* RFC 7905 */
#define MBEDTLS_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   0xCCA8 /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 0xCCA9 /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256     0xCCAA /**< TLS 1.2 */
#define MBEDTLS_TLS_PSK_WITH_CHACHA20_POLY1305_SHA256         0xCCAB /**< TLS 1.2 */
#define MBEDTLS_TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256   0xCCAC /**< TLS 1.2 */
#define MBEDTLS_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256     0xCCAD /**< TLS 1.2 */
#define MBEDTLS_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256     0xCCAE /**< TLS 1.2 */

/* Reminder: update mbedtls_ssl_premaster_secret when adding a new key exchange.
 * Reminder: update MBEDTLS_KEY_EXCHANGE__xxx below
 */
typedef enum {
    MBEDTLS_KEY_EXCHANGE_NONE = 0,
    MBEDTLS_KEY_EXCHANGE_RSA,
    MBEDTLS_KEY_EXCHANGE_DHE_RSA,
    MBEDTLS_KEY_EXCHANGE_ECDHE_RSA,
    MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA,
    MBEDTLS_KEY_EXCHANGE_PSK,
    MBEDTLS_KEY_EXCHANGE_DHE_PSK,
    MBEDTLS_KEY_EXCHANGE_RSA_PSK,
    MBEDTLS_KEY_EXCHANGE_ECDHE_PSK,
    MBEDTLS_KEY_EXCHANGE_ECDH_RSA,
    MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA,
    MBEDTLS_KEY_EXCHANGE_ECJPAKE,
} mbedtls_key_exchange_type_t;

/* Key exchanges using a certificate */
#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)           || \
    defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)   || \
    defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED)      || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED
#endif

/* Key exchanges allowing client certificate requests */
#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)           ||       \
    defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       ||       \
    defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED)      ||       \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     ||       \
    defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)    ||       \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_CERT_REQ_ALLOWED_ENABLED
#endif

/* Key exchanges involving server signature in ServerKeyExchange */
#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_WITH_SERVER_SIGNATURE_ENABLED
#endif

/* Key exchanges using ECDH */
#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED)      || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_SOME_ECDH_ENABLED
#endif

/* Key exchanges that don't involve ephemeral keys */
#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)           || \
    defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)           || \
    defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_SOME_ECDH_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_SOME_NON_PFS_ENABLED
#endif

/* Key exchanges that involve ephemeral keys */
#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)     || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)   || \
    defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_SOME_PFS_ENABLED
#endif

/* Key exchanges using a PSK */
#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)           || \
    defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED
#endif

/* Key exchanges using DHE */
#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       || \
    defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_SOME_DHE_ENABLED
#endif

/* Key exchanges using ECDHE */
#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)   || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
#define MBEDTLS_KEY_EXCHANGE_SOME_ECDHE_ENABLED
#endif

typedef struct mbedtls_ssl_ciphersuite_t mbedtls_ssl_ciphersuite_t;

#define MBEDTLS_CIPHERSUITE_WEAK       0x01    /**< Weak ciphersuite flag  */
#define MBEDTLS_CIPHERSUITE_SHORT_TAG  0x02    /**< Short authentication tag,
                                                     eg for CCM_8 */
#define MBEDTLS_CIPHERSUITE_NODTLS     0x04    /**< Can't be used with DTLS */

/**
 * \brief   This structure is used for storing ciphersuite information
 */
struct mbedtls_ssl_ciphersuite_t
{
    int id;
    const char * name;

    mbedtls_cipher_type_t cipher;
    mbedtls_md_type_t mac;
    mbedtls_key_exchange_type_t key_exchange;

    int min_major_ver;
    int min_minor_ver;
    int max_major_ver;
    int max_minor_ver;

    unsigned char flags;
};

const int *mbedtls_ssl_list_ciphersuites( void );

const mbedtls_ssl_ciphersuite_t *mbedtls_ssl_ciphersuite_from_string( const char *ciphersuite_name );
const mbedtls_ssl_ciphersuite_t *mbedtls_ssl_ciphersuite_from_id( int ciphersuite_id );

#if defined(MBEDTLS_PK_C)
mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_pk_alg( const mbedtls_ssl_ciphersuite_t *info );
mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_alg( const mbedtls_ssl_ciphersuite_t *info );
#endif

int mbedtls_ssl_ciphersuite_uses_ec( const mbedtls_ssl_ciphersuite_t *info );
int mbedtls_ssl_ciphersuite_uses_psk( const mbedtls_ssl_ciphersuite_t *info );

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PFS_ENABLED)
static inline int mbedtls_ssl_ciphersuite_has_pfs( const mbedtls_ssl_ciphersuite_t *info )
{
    switch( info->key_exchange )
    {
        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
        case MBEDTLS_KEY_EXCHANGE_ECJPAKE:
            return( 1 );

        default:
            return( 0 );
    }
}
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PFS_ENABLED */

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_NON_PFS_ENABLED)
static inline int mbedtls_ssl_ciphersuite_no_pfs( const mbedtls_ssl_ciphersuite_t *info )
{
    switch( info->key_exchange )
    {
        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
        case MBEDTLS_KEY_EXCHANGE_RSA:
        case MBEDTLS_KEY_EXCHANGE_PSK:
        case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
            return( 1 );

        default:
            return( 0 );
    }
}
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_NON_PFS_ENABLED */

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_ECDH_ENABLED)
static inline int mbedtls_ssl_ciphersuite_uses_ecdh( const mbedtls_ssl_ciphersuite_t *info )
{
    switch( info->key_exchange )
    {
        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
            return( 1 );

        default:
            return( 0 );
    }
}
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_ECDH_ENABLED */

static inline int mbedtls_ssl_ciphersuite_cert_req_allowed( const mbedtls_ssl_ciphersuite_t *info )
{
    switch( info->key_exchange )
    {
        case MBEDTLS_KEY_EXCHANGE_RSA:
        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
            return( 1 );

        default:
            return( 0 );
    }
}

static inline int mbedtls_ssl_ciphersuite_uses_srv_cert( const mbedtls_ssl_ciphersuite_t *info )
{
    switch( info->key_exchange )
    {
        case MBEDTLS_KEY_EXCHANGE_RSA:
        case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
            return( 1 );

        default:
            return( 0 );
    }
}

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_DHE_ENABLED)
static inline int mbedtls_ssl_ciphersuite_uses_dhe( const mbedtls_ssl_ciphersuite_t *info )
{
    switch( info->key_exchange )
    {
        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
            return( 1 );

        default:
            return( 0 );
    }
}
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_DHE_ENABLED) */

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_ECDHE_ENABLED)
static inline int mbedtls_ssl_ciphersuite_uses_ecdhe( const mbedtls_ssl_ciphersuite_t *info )
{
    switch( info->key_exchange )
    {
        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
            return( 1 );

        default:
            return( 0 );
    }
}
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_ECDHE_ENABLED) */

#if defined(MBEDTLS_KEY_EXCHANGE_WITH_SERVER_SIGNATURE_ENABLED)
static inline int mbedtls_ssl_ciphersuite_uses_server_signature( const mbedtls_ssl_ciphersuite_t *info )
{
    switch( info->key_exchange )
    {
        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
            return( 1 );

        default:
            return( 0 );
    }
}
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_SERVER_SIGNATURE_ENABLED */

#ifdef __cplusplus
}
#endif

#endif /* ssl_ciphersuites.h */


/********* Start of file include/mbedtls/cipher_internal.h ************/

/**
 * \file cipher_internal.h
 *
 * \brief Cipher wrappers.
 *
 * \author Adriaan de Jong <dejong@fox-it.com>
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_CIPHER_WRAP_H
#define MBEDTLS_CIPHER_WRAP_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#if defined(MBEDTLS_USE_PSA_CRYPTO)

#endif /* MBEDTLS_USE_PSA_CRYPTO */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Base cipher information. The non-mode specific functions and values.
 */
struct mbedtls_cipher_base_t
{
    /** Base Cipher type (e.g. MBEDTLS_CIPHER_ID_AES) */
    mbedtls_cipher_id_t cipher;

    /** Encrypt using ECB */
    int (*ecb_func)( void *ctx, mbedtls_operation_t mode,
                     const unsigned char *input, unsigned char *output );

#if defined(MBEDTLS_CIPHER_MODE_CBC)
    /** Encrypt using CBC */
    int (*cbc_func)( void *ctx, mbedtls_operation_t mode, size_t length,
                     unsigned char *iv, const unsigned char *input,
                     unsigned char *output );
#endif

#if defined(MBEDTLS_CIPHER_MODE_CFB)
    /** Encrypt using CFB (Full length) */
    int (*cfb_func)( void *ctx, mbedtls_operation_t mode, size_t length, size_t *iv_off,
                     unsigned char *iv, const unsigned char *input,
                     unsigned char *output );
#endif

#if defined(MBEDTLS_CIPHER_MODE_OFB)
    /** Encrypt using OFB (Full length) */
    int (*ofb_func)( void *ctx, size_t length, size_t *iv_off,
                     unsigned char *iv,
                     const unsigned char *input,
                     unsigned char *output );
#endif

#if defined(MBEDTLS_CIPHER_MODE_CTR)
    /** Encrypt using CTR */
    int (*ctr_func)( void *ctx, size_t length, size_t *nc_off,
                     unsigned char *nonce_counter, unsigned char *stream_block,
                     const unsigned char *input, unsigned char *output );
#endif

#if defined(MBEDTLS_CIPHER_MODE_XTS)
    /** Encrypt or decrypt using XTS. */
    int (*xts_func)( void *ctx, mbedtls_operation_t mode, size_t length,
                     const unsigned char data_unit[16],
                     const unsigned char *input, unsigned char *output );
#endif

#if defined(MBEDTLS_CIPHER_MODE_STREAM)
    /** Encrypt using STREAM */
    int (*stream_func)( void *ctx, size_t length,
                        const unsigned char *input, unsigned char *output );
#endif

    /** Set key for encryption purposes */
    int (*setkey_enc_func)( void *ctx, const unsigned char *key,
                            unsigned int key_bitlen );

    /** Set key for decryption purposes */
    int (*setkey_dec_func)( void *ctx, const unsigned char *key,
                            unsigned int key_bitlen);

    /** Allocate a new context */
    void * (*ctx_alloc_func)( void );

    /** Free the given context */
    void (*ctx_free_func)( void *ctx );

};

typedef struct
{
    mbedtls_cipher_type_t type;
    const mbedtls_cipher_info_t *info;
} mbedtls_cipher_definition_t;

#if defined(MBEDTLS_USE_PSA_CRYPTO)
typedef enum
{
    MBEDTLS_CIPHER_PSA_KEY_UNSET = 0,
    MBEDTLS_CIPHER_PSA_KEY_OWNED, /* Used for PSA-based cipher contexts which */
                                  /* use raw key material internally imported */
                                  /* as a volatile key, and which hence need  */
                                  /* to destroy that key when the context is  */
                                  /* freed.                                   */
    MBEDTLS_CIPHER_PSA_KEY_NOT_OWNED, /* Used for PSA-based cipher contexts   */
                                      /* which use a key provided by the      */
                                      /* user, and which hence will not be    */
                                      /* destroyed when the context is freed. */
} mbedtls_cipher_psa_key_ownership;

typedef struct
{
    psa_algorithm_t alg;
    psa_key_id_t slot;
    mbedtls_cipher_psa_key_ownership slot_state;
} mbedtls_cipher_context_psa;
#endif /* MBEDTLS_USE_PSA_CRYPTO */

extern const mbedtls_cipher_definition_t mbedtls_cipher_definitions[];

extern int mbedtls_cipher_supported[];

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_CIPHER_WRAP_H */


/********* Start of file include/mbedtls/ecdh.h ************/

/**
 * \file ecdh.h
 *
 * \brief This file contains ECDH definitions and functions.
 *
 * The Elliptic Curve Diffie-Hellman (ECDH) protocol is an anonymous
 * key agreement protocol allowing two parties to establish a shared
 * secret over an insecure channel. Each party must have an
 * elliptic-curve public–private key pair.
 *
 * For more information, see <em>NIST SP 800-56A Rev. 2: Recommendation for
 * Pair-Wise Key Establishment Schemes Using Discrete Logarithm
 * Cryptography</em>.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_ECDH_H
#define MBEDTLS_ECDH_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
#undef MBEDTLS_ECDH_LEGACY_CONTEXT

#endif

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Defines the source of the imported EC key.
 */
typedef enum
{
    MBEDTLS_ECDH_OURS,   /**< Our key. */
    MBEDTLS_ECDH_THEIRS, /**< The key of the peer. */
} mbedtls_ecdh_side;

#if !defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
/**
 * Defines the ECDH implementation used.
 *
 * Later versions of the library may add new variants, therefore users should
 * not make any assumptions about them.
 */
typedef enum
{
    MBEDTLS_ECDH_VARIANT_NONE = 0,   /*!< Implementation not defined. */
    MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0,/*!< The default Mbed TLS implementation */
#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
    MBEDTLS_ECDH_VARIANT_EVEREST     /*!< Everest implementation */
#endif
} mbedtls_ecdh_variant;

/**
 * The context used by the default ECDH implementation.
 *
 * Later versions might change the structure of this context, therefore users
 * should not make any assumptions about the structure of
 * mbedtls_ecdh_context_mbed.
 */
typedef struct mbedtls_ecdh_context_mbed
{
    mbedtls_ecp_group grp;   /*!< The elliptic curve used. */
    mbedtls_mpi d;           /*!< The private key. */
    mbedtls_ecp_point Q;     /*!< The public key. */
    mbedtls_ecp_point Qp;    /*!< The value of the public key of the peer. */
    mbedtls_mpi z;           /*!< The shared secret. */
#if defined(MBEDTLS_ECP_RESTARTABLE)
    mbedtls_ecp_restart_ctx rs; /*!< The restart context for EC computations. */
#endif
} mbedtls_ecdh_context_mbed;
#endif

/**
 *
 * \warning         Performing multiple operations concurrently on the same
 *                  ECDSA context is not supported; objects of this type
 *                  should not be shared between multiple threads.
 * \brief           The ECDH context structure.
 */
typedef struct mbedtls_ecdh_context
{
#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
    mbedtls_ecp_group grp;   /*!< The elliptic curve used. */
    mbedtls_mpi d;           /*!< The private key. */
    mbedtls_ecp_point Q;     /*!< The public key. */
    mbedtls_ecp_point Qp;    /*!< The value of the public key of the peer. */
    mbedtls_mpi z;           /*!< The shared secret. */
    int point_format;        /*!< The format of point export in TLS messages. */
    mbedtls_ecp_point Vi;    /*!< The blinding value. */
    mbedtls_ecp_point Vf;    /*!< The unblinding value. */
    mbedtls_mpi _d;          /*!< The previous \p d. */
#if defined(MBEDTLS_ECP_RESTARTABLE)
    int restart_enabled;        /*!< The flag for restartable mode. */
    mbedtls_ecp_restart_ctx rs; /*!< The restart context for EC computations. */
#endif /* MBEDTLS_ECP_RESTARTABLE */
#else
    uint8_t point_format;       /*!< The format of point export in TLS messages
                                  as defined in RFC 4492. */
    mbedtls_ecp_group_id grp_id;/*!< The elliptic curve used. */
    mbedtls_ecdh_variant var;   /*!< The ECDH implementation/structure used. */
    union
    {
        mbedtls_ecdh_context_mbed   mbed_ecdh;
#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
        mbedtls_ecdh_context_everest everest_ecdh;
#endif
    } ctx;                      /*!< Implementation-specific context. The
                                  context in use is specified by the \c var
                                  field. */
#if defined(MBEDTLS_ECP_RESTARTABLE)
    uint8_t restart_enabled;    /*!< The flag for restartable mode. Functions of
                                  an alternative implementation not supporting
                                  restartable mode must return
                                  MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED error
                                  if this flag is set. */
#endif /* MBEDTLS_ECP_RESTARTABLE */
#endif /* MBEDTLS_ECDH_LEGACY_CONTEXT */
}
mbedtls_ecdh_context;

/**
 * \brief          Check whether a given group can be used for ECDH.
 *
 * \param gid      The ECP group ID to check.
 *
 * \return         \c 1 if the group can be used, \c 0 otherwise
 */
int mbedtls_ecdh_can_do( mbedtls_ecp_group_id gid );

/**
 * \brief           This function generates an ECDH keypair on an elliptic
 *                  curve.
 *
 *                  This function performs the first of two core computations
 *                  implemented during the ECDH key exchange. The second core
 *                  computation is performed by mbedtls_ecdh_compute_shared().
 *
 * \see             ecp.h
 *
 * \param grp       The ECP group to use. This must be initialized and have
 *                  domain parameters loaded, for example through
 *                  mbedtls_ecp_load() or mbedtls_ecp_tls_read_group().
 * \param d         The destination MPI (private key).
 *                  This must be initialized.
 * \param Q         The destination point (public key).
 *                  This must be initialized.
 * \param f_rng     The RNG function to use. This must not be \c NULL.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may be
 *                  \c NULL in case \p f_rng doesn't need a context argument.
 *
 * \return          \c 0 on success.
 * \return          Another \c MBEDTLS_ERR_ECP_XXX or
 *                  \c MBEDTLS_MPI_XXX error code on failure.
 */
int mbedtls_ecdh_gen_public( mbedtls_ecp_group *grp, mbedtls_mpi *d, mbedtls_ecp_point *Q,
                     int (*f_rng)(void *, unsigned char *, size_t),
                     void *p_rng );

/**
 * \brief           This function computes the shared secret.
 *
 *                  This function performs the second of two core computations
 *                  implemented during the ECDH key exchange. The first core
 *                  computation is performed by mbedtls_ecdh_gen_public().
 *
 * \see             ecp.h
 *
 * \note            If \p f_rng is not NULL, it is used to implement
 *                  countermeasures against side-channel attacks.
 *                  For more information, see mbedtls_ecp_mul().
 *
 * \param grp       The ECP group to use. This must be initialized and have
 *                  domain parameters loaded, for example through
 *                  mbedtls_ecp_load() or mbedtls_ecp_tls_read_group().
 * \param z         The destination MPI (shared secret).
 *                  This must be initialized.
 * \param Q         The public key from another party.
 *                  This must be initialized.
 * \param d         Our secret exponent (private key).
 *                  This must be initialized.
 * \param f_rng     The RNG function. This may be \c NULL if randomization
 *                  of intermediate results during the ECP computations is
 *                  not needed (discouraged). See the documentation of
 *                  mbedtls_ecp_mul() for more.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may be
 *                  \c NULL if \p f_rng is \c NULL or doesn't need a
 *                  context argument.
 *
 * \return          \c 0 on success.
 * \return          Another \c MBEDTLS_ERR_ECP_XXX or
 *                  \c MBEDTLS_MPI_XXX error code on failure.
 */
int mbedtls_ecdh_compute_shared( mbedtls_ecp_group *grp, mbedtls_mpi *z,
                         const mbedtls_ecp_point *Q, const mbedtls_mpi *d,
                         int (*f_rng)(void *, unsigned char *, size_t),
                         void *p_rng );

/**
 * \brief           This function initializes an ECDH context.
 *
 * \param ctx       The ECDH context to initialize. This must not be \c NULL.
 */
void mbedtls_ecdh_init( mbedtls_ecdh_context *ctx );

/**
 * \brief           This function sets up the ECDH context with the information
 *                  given.
 *
 *                  This function should be called after mbedtls_ecdh_init() but
 *                  before mbedtls_ecdh_make_params(). There is no need to call
 *                  this function before mbedtls_ecdh_read_params().
 *
 *                  This is the first function used by a TLS server for ECDHE
 *                  ciphersuites.
 *
 * \param ctx       The ECDH context to set up. This must be initialized.
 * \param grp_id    The group id of the group to set up the context for.
 *
 * \return          \c 0 on success.
 */
int mbedtls_ecdh_setup( mbedtls_ecdh_context *ctx,
                        mbedtls_ecp_group_id grp_id );

/**
 * \brief           This function frees a context.
 *
 * \param ctx       The context to free. This may be \c NULL, in which
 *                  case this function does nothing. If it is not \c NULL,
 *                  it must point to an initialized ECDH context.
 */
void mbedtls_ecdh_free( mbedtls_ecdh_context *ctx );

/**
 * \brief           This function generates an EC key pair and exports its
 *                  in the format used in a TLS ServerKeyExchange handshake
 *                  message.
 *
 *                  This is the second function used by a TLS server for ECDHE
 *                  ciphersuites. (It is called after mbedtls_ecdh_setup().)
 *
 * \see             ecp.h
 *
 * \param ctx       The ECDH context to use. This must be initialized
 *                  and bound to a group, for example via mbedtls_ecdh_setup().
 * \param olen      The address at which to store the number of Bytes written.
 * \param buf       The destination buffer. This must be a writable buffer of
 *                  length \p blen Bytes.
 * \param blen      The length of the destination buffer \p buf in Bytes.
 * \param f_rng     The RNG function to use. This must not be \c NULL.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may be
 *                  \c NULL in case \p f_rng doesn't need a context argument.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 * \return          Another \c MBEDTLS_ERR_ECP_XXX error code on failure.
 */
int mbedtls_ecdh_make_params( mbedtls_ecdh_context *ctx, size_t *olen,
                      unsigned char *buf, size_t blen,
                      int (*f_rng)(void *, unsigned char *, size_t),
                      void *p_rng );

/**
 * \brief           This function parses the ECDHE parameters in a
 *                  TLS ServerKeyExchange handshake message.
 *
 * \note            In a TLS handshake, this is the how the client
 *                  sets up its ECDHE context from the server's public
 *                  ECDHE key material.
 *
 * \see             ecp.h
 *
 * \param ctx       The ECDHE context to use. This must be initialized.
 * \param buf       On input, \c *buf must be the start of the input buffer.
 *                  On output, \c *buf is updated to point to the end of the
 *                  data that has been read. On success, this is the first byte
 *                  past the end of the ServerKeyExchange parameters.
 *                  On error, this is the point at which an error has been
 *                  detected, which is usually not useful except to debug
 *                  failures.
 * \param end       The end of the input buffer.
 *
 * \return          \c 0 on success.
 * \return          An \c MBEDTLS_ERR_ECP_XXX error code on failure.
 *
 */
int mbedtls_ecdh_read_params( mbedtls_ecdh_context *ctx,
                              const unsigned char **buf,
                              const unsigned char *end );

/**
 * \brief           This function sets up an ECDH context from an EC key.
 *
 *                  It is used by clients and servers in place of the
 *                  ServerKeyEchange for static ECDH, and imports ECDH
 *                  parameters from the EC key information of a certificate.
 *
 * \see             ecp.h
 *
 * \param ctx       The ECDH context to set up. This must be initialized.
 * \param key       The EC key to use. This must be initialized.
 * \param side      Defines the source of the key. Possible values are:
 *                  - #MBEDTLS_ECDH_OURS: The key is ours.
 *                  - #MBEDTLS_ECDH_THEIRS: The key is that of the peer.
 *
 * \return          \c 0 on success.
 * \return          Another \c MBEDTLS_ERR_ECP_XXX error code on failure.
 *
 */
int mbedtls_ecdh_get_params( mbedtls_ecdh_context *ctx,
                             const mbedtls_ecp_keypair *key,
                             mbedtls_ecdh_side side );

/**
 * \brief           This function generates a public key and exports it
 *                  as a TLS ClientKeyExchange payload.
 *
 *                  This is the second function used by a TLS client for ECDH(E)
 *                  ciphersuites.
 *
 * \see             ecp.h
 *
 * \param ctx       The ECDH context to use. This must be initialized
 *                  and bound to a group, the latter usually by
 *                  mbedtls_ecdh_read_params().
 * \param olen      The address at which to store the number of Bytes written.
 *                  This must not be \c NULL.
 * \param buf       The destination buffer. This must be a writable buffer
 *                  of length \p blen Bytes.
 * \param blen      The size of the destination buffer \p buf in Bytes.
 * \param f_rng     The RNG function to use. This must not be \c NULL.
 * \param p_rng     The RNG context to be passed to \p f_rng. This may be
 *                  \c NULL in case \p f_rng doesn't need a context argument.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 * \return          Another \c MBEDTLS_ERR_ECP_XXX error code on failure.
 */
int mbedtls_ecdh_make_public( mbedtls_ecdh_context *ctx, size_t *olen,
                      unsigned char *buf, size_t blen,
                      int (*f_rng)(void *, unsigned char *, size_t),
                      void *p_rng );

/**
 * \brief       This function parses and processes the ECDHE payload of a
 *              TLS ClientKeyExchange message.
 *
 *              This is the third function used by a TLS server for ECDH(E)
 *              ciphersuites. (It is called after mbedtls_ecdh_setup() and
 *              mbedtls_ecdh_make_params().)
 *
 * \see         ecp.h
 *
 * \param ctx   The ECDH context to use. This must be initialized
 *              and bound to a group, for example via mbedtls_ecdh_setup().
 * \param buf   The pointer to the ClientKeyExchange payload. This must
 *              be a readable buffer of length \p blen Bytes.
 * \param blen  The length of the input buffer \p buf in Bytes.
 *
 * \return      \c 0 on success.
 * \return      An \c MBEDTLS_ERR_ECP_XXX error code on failure.
 */
int mbedtls_ecdh_read_public( mbedtls_ecdh_context *ctx,
                              const unsigned char *buf, size_t blen );

/**
 * \brief           This function derives and exports the shared secret.
 *
 *                  This is the last function used by both TLS client
 *                  and servers.
 *
 * \note            If \p f_rng is not NULL, it is used to implement
 *                  countermeasures against side-channel attacks.
 *                  For more information, see mbedtls_ecp_mul().
 *
 * \see             ecp.h

 * \param ctx       The ECDH context to use. This must be initialized
 *                  and have its own private key generated and the peer's
 *                  public key imported.
 * \param olen      The address at which to store the total number of
 *                  Bytes written on success. This must not be \c NULL.
 * \param buf       The buffer to write the generated shared key to. This
 *                  must be a writable buffer of size \p blen Bytes.
 * \param blen      The length of the destination buffer \p buf in Bytes.
 * \param f_rng     The RNG function, for blinding purposes. This may
 *                  b \c NULL if blinding isn't needed.
 * \param p_rng     The RNG context. This may be \c NULL if \p f_rng
 *                  doesn't need a context argument.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
 *                  operations was reached: see \c mbedtls_ecp_set_max_ops().
 * \return          Another \c MBEDTLS_ERR_ECP_XXX error code on failure.
 */
int mbedtls_ecdh_calc_secret( mbedtls_ecdh_context *ctx, size_t *olen,
                      unsigned char *buf, size_t blen,
                      int (*f_rng)(void *, unsigned char *, size_t),
                      void *p_rng );

#if defined(MBEDTLS_ECP_RESTARTABLE)
/**
 * \brief           This function enables restartable EC computations for this
 *                  context.  (Default: disabled.)
 *
 * \see             \c mbedtls_ecp_set_max_ops()
 *
 * \note            It is not possible to safely disable restartable
 *                  computations once enabled, except by free-ing the context,
 *                  which cancels possible in-progress operations.
 *
 * \param ctx       The ECDH context to use. This must be initialized.
 */
void mbedtls_ecdh_enable_restart( mbedtls_ecdh_context *ctx );
#endif /* MBEDTLS_ECP_RESTARTABLE */

#ifdef __cplusplus
}
#endif

#endif /* ecdh.h */


/********* Start of file include/mbedtls/sha1.h ************/

/**
 * \file sha1.h
 *
 * \brief This file contains SHA-1 definitions and functions.
 *
 * The Secure Hash Algorithm 1 (SHA-1) cryptographic hash function is defined in
 * <em>FIPS 180-4: Secure Hash Standard (SHS)</em>.
 *
 * \warning   SHA-1 is considered a weak message digest and its use constitutes
 *            a security risk. We recommend considering stronger message
 *            digests instead.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SHA1_H
#define MBEDTLS_SHA1_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

/* MBEDTLS_ERR_SHA1_HW_ACCEL_FAILED is deprecated and should not be used. */
/** SHA-1 hardware accelerator failed */
#define MBEDTLS_ERR_SHA1_HW_ACCEL_FAILED                  -0x0035
/** SHA-1 input data was malformed. */
#define MBEDTLS_ERR_SHA1_BAD_INPUT_DATA                   -0x0073

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_SHA1_ALT)
// Regular implementation
//

/**
 * \brief          The SHA-1 context structure.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 */
typedef struct mbedtls_sha1_context
{
    uint32_t total[2];          /*!< The number of Bytes processed.  */
    uint32_t state[5];          /*!< The intermediate digest state.  */
    unsigned char buffer[64];   /*!< The data block being processed. */
}
mbedtls_sha1_context;

#else  /* MBEDTLS_SHA1_ALT */

#endif /* MBEDTLS_SHA1_ALT */

/**
 * \brief          This function initializes a SHA-1 context.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \param ctx      The SHA-1 context to initialize.
 *                 This must not be \c NULL.
 *
 */
void mbedtls_sha1_init( mbedtls_sha1_context *ctx );

/**
 * \brief          This function clears a SHA-1 context.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \param ctx      The SHA-1 context to clear. This may be \c NULL,
 *                 in which case this function does nothing. If it is
 *                 not \c NULL, it must point to an initialized
 *                 SHA-1 context.
 *
 */
void mbedtls_sha1_free( mbedtls_sha1_context *ctx );

/**
 * \brief          This function clones the state of a SHA-1 context.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \param dst      The SHA-1 context to clone to. This must be initialized.
 * \param src      The SHA-1 context to clone from. This must be initialized.
 *
 */
void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
                         const mbedtls_sha1_context *src );

/**
 * \brief          This function starts a SHA-1 checksum calculation.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \param ctx      The SHA-1 context to initialize. This must be initialized.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 *
 */
int mbedtls_sha1_starts_ret( mbedtls_sha1_context *ctx );

/**
 * \brief          This function feeds an input buffer into an ongoing SHA-1
 *                 checksum calculation.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \param ctx      The SHA-1 context. This must be initialized
 *                 and have a hash operation started.
 * \param input    The buffer holding the input data.
 *                 This must be a readable buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data \p input in Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha1_update_ret( mbedtls_sha1_context *ctx,
                             const unsigned char *input,
                             size_t ilen );

/**
 * \brief          This function finishes the SHA-1 operation, and writes
 *                 the result to the output buffer.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \param ctx      The SHA-1 context to use. This must be initialized and
 *                 have a hash operation started.
 * \param output   The SHA-1 checksum result. This must be a writable
 *                 buffer of length \c 20 Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha1_finish_ret( mbedtls_sha1_context *ctx,
                             unsigned char output[20] );

/**
 * \brief          SHA-1 process data block (internal use only).
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \param ctx      The SHA-1 context to use. This must be initialized.
 * \param data     The data block being processed. This must be a
 *                 readable buffer of length \c 64 Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 *
 */
int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx,
                                   const unsigned char data[64] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          This function starts a SHA-1 checksum calculation.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \deprecated     Superseded by mbedtls_sha1_starts_ret() in 2.7.0.
 *
 * \param ctx      The SHA-1 context to initialize. This must be initialized.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_sha1_starts( mbedtls_sha1_context *ctx );

/**
 * \brief          This function feeds an input buffer into an ongoing SHA-1
 *                 checksum calculation.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \deprecated     Superseded by mbedtls_sha1_update_ret() in 2.7.0.
 *
 * \param ctx      The SHA-1 context. This must be initialized and
 *                 have a hash operation started.
 * \param input    The buffer holding the input data.
 *                 This must be a readable buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data \p input in Bytes.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_sha1_update( mbedtls_sha1_context *ctx,
                                             const unsigned char *input,
                                             size_t ilen );

/**
 * \brief          This function finishes the SHA-1 operation, and writes
 *                 the result to the output buffer.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \deprecated     Superseded by mbedtls_sha1_finish_ret() in 2.7.0.
 *
 * \param ctx      The SHA-1 context. This must be initialized and
 *                 have a hash operation started.
 * \param output   The SHA-1 checksum result.
 *                 This must be a writable buffer of length \c 20 Bytes.
 */
MBEDTLS_DEPRECATED void mbedtls_sha1_finish( mbedtls_sha1_context *ctx,
                                             unsigned char output[20] );

/**
 * \brief          SHA-1 process data block (internal use only).
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \deprecated     Superseded by mbedtls_internal_sha1_process() in 2.7.0.
 *
 * \param ctx      The SHA-1 context. This must be initialized.
 * \param data     The data block being processed.
 *                 This must be a readable buffer of length \c 64 bytes.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_sha1_process( mbedtls_sha1_context *ctx,
                                              const unsigned char data[64] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          This function calculates the SHA-1 checksum of a buffer.
 *
 *                 The function allocates the context, performs the
 *                 calculation, and frees the context.
 *
 *                 The SHA-1 result is calculated as
 *                 output = SHA-1(input buffer).
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \param input    The buffer holding the input data.
 *                 This must be a readable buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data \p input in Bytes.
 * \param output   The SHA-1 checksum result.
 *                 This must be a writable buffer of length \c 20 Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 *
 */
int mbedtls_sha1_ret( const unsigned char *input,
                      size_t ilen,
                      unsigned char output[20] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          This function calculates the SHA-1 checksum of a buffer.
 *
 *                 The function allocates the context, performs the
 *                 calculation, and frees the context.
 *
 *                 The SHA-1 result is calculated as
 *                 output = SHA-1(input buffer).
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \deprecated     Superseded by mbedtls_sha1_ret() in 2.7.0
 *
 * \param input    The buffer holding the input data.
 *                 This must be a readable buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data \p input in Bytes.
 * \param output   The SHA-1 checksum result. This must be a writable
 *                 buffer of size \c 20 Bytes.
 *
 */
MBEDTLS_DEPRECATED void mbedtls_sha1( const unsigned char *input,
                                      size_t ilen,
                                      unsigned char output[20] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          The SHA-1 checkup routine.
 *
 * \warning        SHA-1 is considered a weak message digest and its use
 *                 constitutes a security risk. We recommend considering
 *                 stronger message digests instead.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 *
 */
int mbedtls_sha1_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_sha1.h */


/********* Start of file include/mbedtls/sha256.h ************/

/**
 * \file sha256.h
 *
 * \brief This file contains SHA-224 and SHA-256 definitions and functions.
 *
 * The Secure Hash Algorithms 224 and 256 (SHA-224 and SHA-256) cryptographic
 * hash functions are defined in <em>FIPS 180-4: Secure Hash Standard (SHS)</em>.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SHA256_H
#define MBEDTLS_SHA256_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

/* MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED is deprecated and should not be used. */
/** SHA-256 hardware accelerator failed */
#define MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED                -0x0037
/** SHA-256 input data was malformed. */
#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA                 -0x0074

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_SHA256_ALT)
// Regular implementation
//

/**
 * \brief          The SHA-256 context structure.
 *
 *                 The structure is used both for SHA-256 and for SHA-224
 *                 checksum calculations. The choice between these two is
 *                 made in the call to mbedtls_sha256_starts_ret().
 */
typedef struct mbedtls_sha256_context
{
    uint32_t total[2];          /*!< The number of Bytes processed.  */
    uint32_t state[8];          /*!< The intermediate digest state.  */
    unsigned char buffer[64];   /*!< The data block being processed. */
    int is224;                  /*!< Determines which function to use:
                                     0: Use SHA-256, or 1: Use SHA-224. */
}
mbedtls_sha256_context;

#else  /* MBEDTLS_SHA256_ALT */

#endif /* MBEDTLS_SHA256_ALT */

/**
 * \brief          This function initializes a SHA-256 context.
 *
 * \param ctx      The SHA-256 context to initialize. This must not be \c NULL.
 */
void mbedtls_sha256_init( mbedtls_sha256_context *ctx );

/**
 * \brief          This function clears a SHA-256 context.
 *
 * \param ctx      The SHA-256 context to clear. This may be \c NULL, in which
 *                 case this function returns immediately. If it is not \c NULL,
 *                 it must point to an initialized SHA-256 context.
 */
void mbedtls_sha256_free( mbedtls_sha256_context *ctx );

/**
 * \brief          This function clones the state of a SHA-256 context.
 *
 * \param dst      The destination context. This must be initialized.
 * \param src      The context to clone. This must be initialized.
 */
void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
                           const mbedtls_sha256_context *src );

/**
 * \brief          This function starts a SHA-224 or SHA-256 checksum
 *                 calculation.
 *
 * \param ctx      The context to use. This must be initialized.
 * \param is224    This determines which function to use. This must be
 *                 either \c 0 for SHA-256, or \c 1 for SHA-224.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 );

/**
 * \brief          This function feeds an input buffer into an ongoing
 *                 SHA-256 checksum calculation.
 *
 * \param ctx      The SHA-256 context. This must be initialized
 *                 and have a hash operation started.
 * \param input    The buffer holding the data. This must be a readable
 *                 buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data in Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx,
                               const unsigned char *input,
                               size_t ilen );

/**
 * \brief          This function finishes the SHA-256 operation, and writes
 *                 the result to the output buffer.
 *
 * \param ctx      The SHA-256 context. This must be initialized
 *                 and have a hash operation started.
 * \param output   The SHA-224 or SHA-256 checksum result.
 *                 This must be a writable buffer of length \c 32 Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
                               unsigned char output[32] );

/**
 * \brief          This function processes a single data block within
 *                 the ongoing SHA-256 computation. This function is for
 *                 internal use only.
 *
 * \param ctx      The SHA-256 context. This must be initialized.
 * \param data     The buffer holding one block of data. This must
 *                 be a readable buffer of length \c 64 Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
                                     const unsigned char data[64] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          This function starts a SHA-224 or SHA-256 checksum
 *                 calculation.
 *
 * \deprecated     Superseded by mbedtls_sha256_starts_ret() in 2.7.0.
 *
 * \param ctx      The context to use. This must be initialized.
 * \param is224    Determines which function to use. This must be
 *                 either \c 0 for SHA-256, or \c 1 for SHA-224.
 */
MBEDTLS_DEPRECATED void mbedtls_sha256_starts( mbedtls_sha256_context *ctx,
                                               int is224 );

/**
 * \brief          This function feeds an input buffer into an ongoing
 *                 SHA-256 checksum calculation.
 *
 * \deprecated     Superseded by mbedtls_sha256_update_ret() in 2.7.0.
 *
 * \param ctx      The SHA-256 context to use. This must be
 *                 initialized and have a hash operation started.
 * \param input    The buffer holding the data. This must be a readable
 *                 buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data in Bytes.
 */
MBEDTLS_DEPRECATED void mbedtls_sha256_update( mbedtls_sha256_context *ctx,
                                               const unsigned char *input,
                                               size_t ilen );

/**
 * \brief          This function finishes the SHA-256 operation, and writes
 *                 the result to the output buffer.
 *
 * \deprecated     Superseded by mbedtls_sha256_finish_ret() in 2.7.0.
 *
 * \param ctx      The SHA-256 context. This must be initialized and
 *                 have a hash operation started.
 * \param output   The SHA-224 or SHA-256 checksum result. This must be
 *                 a writable buffer of length \c 32 Bytes.
 */
MBEDTLS_DEPRECATED void mbedtls_sha256_finish( mbedtls_sha256_context *ctx,
                                               unsigned char output[32] );

/**
 * \brief          This function processes a single data block within
 *                 the ongoing SHA-256 computation. This function is for
 *                 internal use only.
 *
 * \deprecated     Superseded by mbedtls_internal_sha256_process() in 2.7.0.
 *
 * \param ctx      The SHA-256 context. This must be initialized.
 * \param data     The buffer holding one block of data. This must be
 *                 a readable buffer of size \c 64 Bytes.
 */
MBEDTLS_DEPRECATED void mbedtls_sha256_process( mbedtls_sha256_context *ctx,
                                                const unsigned char data[64] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          This function calculates the SHA-224 or SHA-256
 *                 checksum of a buffer.
 *
 *                 The function allocates the context, performs the
 *                 calculation, and frees the context.
 *
 *                 The SHA-256 result is calculated as
 *                 output = SHA-256(input buffer).
 *
 * \param input    The buffer holding the data. This must be a readable
 *                 buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data in Bytes.
 * \param output   The SHA-224 or SHA-256 checksum result. This must
 *                 be a writable buffer of length \c 32 Bytes.
 * \param is224    Determines which function to use. This must be
 *                 either \c 0 for SHA-256, or \c 1 for SHA-224.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha256_ret( const unsigned char *input,
                        size_t ilen,
                        unsigned char output[32],
                        int is224 );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif

/**
 * \brief          This function calculates the SHA-224 or SHA-256 checksum
 *                 of a buffer.
 *
 *                 The function allocates the context, performs the
 *                 calculation, and frees the context.
 *
 *                 The SHA-256 result is calculated as
 *                 output = SHA-256(input buffer).
 *
 * \deprecated     Superseded by mbedtls_sha256_ret() in 2.7.0.
 *
 * \param input    The buffer holding the data. This must be a readable
 *                 buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data in Bytes.
 * \param output   The SHA-224 or SHA-256 checksum result. This must be
 *                 a writable buffer of length \c 32 Bytes.
 * \param is224    Determines which function to use. This must be either
 *                 \c 0 for SHA-256, or \c 1 for SHA-224.
 */
MBEDTLS_DEPRECATED void mbedtls_sha256( const unsigned char *input,
                                        size_t ilen,
                                        unsigned char output[32],
                                        int is224 );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          The SHA-224 and SHA-256 checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
int mbedtls_sha256_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_sha256.h */


/********* Start of file include/mbedtls/sha512.h ************/

/**
 * \file sha512.h
 * \brief This file contains SHA-384 and SHA-512 definitions and functions.
 *
 * The Secure Hash Algorithms 384 and 512 (SHA-384 and SHA-512) cryptographic
 * hash functions are defined in <em>FIPS 180-4: Secure Hash Standard (SHS)</em>.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SHA512_H
#define MBEDTLS_SHA512_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

/* MBEDTLS_ERR_SHA512_HW_ACCEL_FAILED is deprecated and should not be used. */
/** SHA-512 hardware accelerator failed */
#define MBEDTLS_ERR_SHA512_HW_ACCEL_FAILED                -0x0039
/** SHA-512 input data was malformed. */
#define MBEDTLS_ERR_SHA512_BAD_INPUT_DATA                 -0x0075

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_SHA512_ALT)
// Regular implementation
//

/**
 * \brief          The SHA-512 context structure.
 *
 *                 The structure is used both for SHA-384 and for SHA-512
 *                 checksum calculations. The choice between these two is
 *                 made in the call to mbedtls_sha512_starts_ret().
 */
typedef struct mbedtls_sha512_context
{
    uint64_t total[2];          /*!< The number of Bytes processed. */
    uint64_t state[8];          /*!< The intermediate digest state. */
    unsigned char buffer[128];  /*!< The data block being processed. */
#if !defined(MBEDTLS_SHA512_NO_SHA384)
    int is384;                  /*!< Determines which function to use:
                                     0: Use SHA-512, or 1: Use SHA-384. */
#endif
}
mbedtls_sha512_context;

#else  /* MBEDTLS_SHA512_ALT */

#endif /* MBEDTLS_SHA512_ALT */

/**
 * \brief          This function initializes a SHA-512 context.
 *
 * \param ctx      The SHA-512 context to initialize. This must
 *                 not be \c NULL.
 */
void mbedtls_sha512_init( mbedtls_sha512_context *ctx );

/**
 * \brief          This function clears a SHA-512 context.
 *
 * \param ctx      The SHA-512 context to clear. This may be \c NULL,
 *                 in which case this function does nothing. If it
 *                 is not \c NULL, it must point to an initialized
 *                 SHA-512 context.
 */
void mbedtls_sha512_free( mbedtls_sha512_context *ctx );

/**
 * \brief          This function clones the state of a SHA-512 context.
 *
 * \param dst      The destination context. This must be initialized.
 * \param src      The context to clone. This must be initialized.
 */
void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
                           const mbedtls_sha512_context *src );

/**
 * \brief          This function starts a SHA-384 or SHA-512 checksum
 *                 calculation.
 *
 * \param ctx      The SHA-512 context to use. This must be initialized.
 * \param is384    Determines which function to use. This must be
 *                 either \c 0 for SHA-512, or \c 1 for SHA-384.
 *
 * \note           When \c MBEDTLS_SHA512_NO_SHA384 is defined, \p is384 must
 *                 be \c 0, or the function will return
 *                 #MBEDTLS_ERR_SHA512_BAD_INPUT_DATA.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 );

/**
 * \brief          This function feeds an input buffer into an ongoing
 *                 SHA-512 checksum calculation.
 *
 * \param ctx      The SHA-512 context. This must be initialized
 *                 and have a hash operation started.
 * \param input    The buffer holding the input data. This must
 *                 be a readable buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data in Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx,
                    const unsigned char *input,
                    size_t ilen );

/**
 * \brief          This function finishes the SHA-512 operation, and writes
 *                 the result to the output buffer.
 *
 * \param ctx      The SHA-512 context. This must be initialized
 *                 and have a hash operation started.
 * \param output   The SHA-384 or SHA-512 checksum result.
 *                 This must be a writable buffer of length \c 64 Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
                               unsigned char output[64] );

/**
 * \brief          This function processes a single data block within
 *                 the ongoing SHA-512 computation.
 *                 This function is for internal use only.
 *
 * \param ctx      The SHA-512 context. This must be initialized.
 * \param data     The buffer holding one block of data. This
 *                 must be a readable buffer of length \c 128 Bytes.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
                                     const unsigned char data[128] );
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          This function starts a SHA-384 or SHA-512 checksum
 *                 calculation.
 *
 * \deprecated     Superseded by mbedtls_sha512_starts_ret() in 2.7.0
 *
 * \param ctx      The SHA-512 context to use. This must be initialized.
 * \param is384    Determines which function to use. This must be either
 *                 \c 0 for SHA-512 or \c 1 for SHA-384.
 *
 * \note           When \c MBEDTLS_SHA512_NO_SHA384 is defined, \p is384 must
 *                 be \c 0, or the function will fail to work.
 */
MBEDTLS_DEPRECATED void mbedtls_sha512_starts( mbedtls_sha512_context *ctx,
                                               int is384 );

/**
 * \brief          This function feeds an input buffer into an ongoing
 *                 SHA-512 checksum calculation.
 *
 * \deprecated     Superseded by mbedtls_sha512_update_ret() in 2.7.0.
 *
 * \param ctx      The SHA-512 context. This must be initialized
 *                 and have a hash operation started.
 * \param input    The buffer holding the data. This must be a readable
 *                 buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data in Bytes.
 */
MBEDTLS_DEPRECATED void mbedtls_sha512_update( mbedtls_sha512_context *ctx,
                                               const unsigned char *input,
                                               size_t ilen );

/**
 * \brief          This function finishes the SHA-512 operation, and writes
 *                 the result to the output buffer.
 *
 * \deprecated     Superseded by mbedtls_sha512_finish_ret() in 2.7.0.
 *
 * \param ctx      The SHA-512 context. This must be initialized
 *                 and have a hash operation started.
 * \param output   The SHA-384 or SHA-512 checksum result. This must
 *                 be a writable buffer of size \c 64 Bytes.
 */
MBEDTLS_DEPRECATED void mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
                                               unsigned char output[64] );

/**
 * \brief          This function processes a single data block within
 *                 the ongoing SHA-512 computation. This function is for
 *                 internal use only.
 *
 * \deprecated     Superseded by mbedtls_internal_sha512_process() in 2.7.0.
 *
 * \param ctx      The SHA-512 context. This must be initialized.
 * \param data     The buffer holding one block of data. This must be
 *                 a readable buffer of length \c 128 Bytes.
 */
MBEDTLS_DEPRECATED void mbedtls_sha512_process(
                                            mbedtls_sha512_context *ctx,
                                            const unsigned char data[128] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          This function calculates the SHA-512 or SHA-384
 *                 checksum of a buffer.
 *
 *                 The function allocates the context, performs the
 *                 calculation, and frees the context.
 *
 *                 The SHA-512 result is calculated as
 *                 output = SHA-512(input buffer).
 *
 * \param input    The buffer holding the input data. This must be
 *                 a readable buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data in Bytes.
 * \param output   The SHA-384 or SHA-512 checksum result.
 *                 This must be a writable buffer of length \c 64 Bytes.
 * \param is384    Determines which function to use. This must be either
 *                 \c 0 for SHA-512, or \c 1 for SHA-384.
 *
 * \note           When \c MBEDTLS_SHA512_NO_SHA384 is defined, \p is384 must
 *                 be \c 0, or the function will return
 *                 #MBEDTLS_ERR_SHA512_BAD_INPUT_DATA.
 *
 * \return         \c 0 on success.
 * \return         A negative error code on failure.
 */
int mbedtls_sha512_ret( const unsigned char *input,
                        size_t ilen,
                        unsigned char output[64],
                        int is384 );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif

/**
 * \brief          This function calculates the SHA-512 or SHA-384
 *                 checksum of a buffer.
 *
 *                 The function allocates the context, performs the
 *                 calculation, and frees the context.
 *
 *                 The SHA-512 result is calculated as
 *                 output = SHA-512(input buffer).
 *
 * \deprecated     Superseded by mbedtls_sha512_ret() in 2.7.0
 *
 * \param input    The buffer holding the data. This must be a
 *                 readable buffer of length \p ilen Bytes.
 * \param ilen     The length of the input data in Bytes.
 * \param output   The SHA-384 or SHA-512 checksum result. This must
 *                 be a writable buffer of length \c 64 Bytes.
 * \param is384    Determines which function to use. This must be either
 *                 \c 0 for SHA-512, or \c 1 for SHA-384.
 *
 * \note           When \c MBEDTLS_SHA512_NO_SHA384 is defined, \p is384 must
 *                 be \c 0, or the function will fail to work.
 */
MBEDTLS_DEPRECATED void mbedtls_sha512( const unsigned char *input,
                                        size_t ilen,
                                        unsigned char output[64],
                                        int is384 );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_SELF_TEST)

 /**
 * \brief          The SHA-384 or SHA-512 checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
int mbedtls_sha512_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_sha512.h */


/********* Start of file include/mbedtls/aes.h ************/

/**
 * \file aes.h
 *
 * \brief   This file contains AES definitions and functions.
 *
 *          The Advanced Encryption Standard (AES) specifies a FIPS-approved
 *          cryptographic algorithm that can be used to protect electronic
 *          data.
 *
 *          The AES algorithm is a symmetric block cipher that can
 *          encrypt and decrypt information. For more information, see
 *          <em>FIPS Publication 197: Advanced Encryption Standard</em> and
 *          <em>ISO/IEC 18033-2:2006: Information technology -- Security
 *          techniques -- Encryption algorithms -- Part 2: Asymmetric
 *          ciphers</em>.
 *
 *          The AES-XTS block mode is standardized by NIST SP 800-38E
 *          <https://nvlpubs.nist.gov/nistpubs/legacy/sp/nistspecialpublication800-38e.pdf>
 *          and described in detail by IEEE P1619
 *          <https://ieeexplore.ieee.org/servlet/opac?punumber=4375278>.
 */

/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_AES_H
#define MBEDTLS_AES_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif


#include <stddef.h>
#include <stdint.h>

/* padlock.c and aesni.c rely on these values! */
#define MBEDTLS_AES_ENCRYPT     1 /**< AES encryption. */
#define MBEDTLS_AES_DECRYPT     0 /**< AES decryption. */

/* Error codes in range 0x0020-0x0022 */
/** Invalid key length. */
#define MBEDTLS_ERR_AES_INVALID_KEY_LENGTH                -0x0020
/** Invalid data input length. */
#define MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH              -0x0022

/* Error codes in range 0x0021-0x0025 */
/** Invalid input data. */
#define MBEDTLS_ERR_AES_BAD_INPUT_DATA                    -0x0021

/* MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE is deprecated and should not be used. */
/** Feature not available. For example, an unsupported AES key size. */
#define MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE               -0x0023

/* MBEDTLS_ERR_AES_HW_ACCEL_FAILED is deprecated and should not be used. */
/** AES hardware accelerator failed. */
#define MBEDTLS_ERR_AES_HW_ACCEL_FAILED                   -0x0025

#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
    !defined(inline) && !defined(__cplusplus)
#define inline __inline
#endif

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_AES_ALT)
// Regular implementation
//

/**
 * \brief The AES context-type definition.
 */
typedef struct mbedtls_aes_context
{
    int nr;                     /*!< The number of rounds. */
    uint32_t *rk;               /*!< AES round keys. */
    uint32_t buf[68];           /*!< Unaligned data buffer. This buffer can
                                     hold 32 extra Bytes, which can be used for
                                     one of the following purposes:
                                     <ul><li>Alignment if VIA padlock is
                                             used.</li>
                                     <li>Simplifying key expansion in the 256-bit
                                         case by generating an extra round key.
                                         </li></ul> */
}
mbedtls_aes_context;

#if defined(MBEDTLS_CIPHER_MODE_XTS)
/**
 * \brief The AES XTS context-type definition.
 */
typedef struct mbedtls_aes_xts_context
{
    mbedtls_aes_context crypt; /*!< The AES context to use for AES block
                                        encryption or decryption. */
    mbedtls_aes_context tweak; /*!< The AES context used for tweak
                                        computation. */
} mbedtls_aes_xts_context;
#endif /* MBEDTLS_CIPHER_MODE_XTS */

#else  /* MBEDTLS_AES_ALT */

#endif /* MBEDTLS_AES_ALT */

/**
 * \brief          This function initializes the specified AES context.
 *
 *                 It must be the first API called before using
 *                 the context.
 *
 * \param ctx      The AES context to initialize. This must not be \c NULL.
 */
void mbedtls_aes_init( mbedtls_aes_context *ctx );

/**
 * \brief          This function releases and clears the specified AES context.
 *
 * \param ctx      The AES context to clear.
 *                 If this is \c NULL, this function does nothing.
 *                 Otherwise, the context must have been at least initialized.
 */
void mbedtls_aes_free( mbedtls_aes_context *ctx );

#if defined(MBEDTLS_CIPHER_MODE_XTS)
/**
 * \brief          This function initializes the specified AES XTS context.
 *
 *                 It must be the first API called before using
 *                 the context.
 *
 * \param ctx      The AES XTS context to initialize. This must not be \c NULL.
 */
void mbedtls_aes_xts_init( mbedtls_aes_xts_context *ctx );

/**
 * \brief          This function releases and clears the specified AES XTS context.
 *
 * \param ctx      The AES XTS context to clear.
 *                 If this is \c NULL, this function does nothing.
 *                 Otherwise, the context must have been at least initialized.
 */
void mbedtls_aes_xts_free( mbedtls_aes_xts_context *ctx );
#endif /* MBEDTLS_CIPHER_MODE_XTS */

/**
 * \brief          This function sets the encryption key.
 *
 * \param ctx      The AES context to which the key should be bound.
 *                 It must be initialized.
 * \param key      The encryption key.
 *                 This must be a readable buffer of size \p keybits bits.
 * \param keybits  The size of data passed in bits. Valid options are:
 *                 <ul><li>128 bits</li>
 *                 <li>192 bits</li>
 *                 <li>256 bits</li></ul>
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH on failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_setkey_enc( mbedtls_aes_context *ctx, const unsigned char *key,
                    unsigned int keybits );

/**
 * \brief          This function sets the decryption key.
 *
 * \param ctx      The AES context to which the key should be bound.
 *                 It must be initialized.
 * \param key      The decryption key.
 *                 This must be a readable buffer of size \p keybits bits.
 * \param keybits  The size of data passed. Valid options are:
 *                 <ul><li>128 bits</li>
 *                 <li>192 bits</li>
 *                 <li>256 bits</li></ul>
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH on failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_setkey_dec( mbedtls_aes_context *ctx, const unsigned char *key,
                    unsigned int keybits );

#if defined(MBEDTLS_CIPHER_MODE_XTS)
/**
 * \brief          This function prepares an XTS context for encryption and
 *                 sets the encryption key.
 *
 * \param ctx      The AES XTS context to which the key should be bound.
 *                 It must be initialized.
 * \param key      The encryption key. This is comprised of the XTS key1
 *                 concatenated with the XTS key2.
 *                 This must be a readable buffer of size \p keybits bits.
 * \param keybits  The size of \p key passed in bits. Valid options are:
 *                 <ul><li>256 bits (each of key1 and key2 is a 128-bit key)</li>
 *                 <li>512 bits (each of key1 and key2 is a 256-bit key)</li></ul>
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH on failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_xts_setkey_enc( mbedtls_aes_xts_context *ctx,
                                const unsigned char *key,
                                unsigned int keybits );

/**
 * \brief          This function prepares an XTS context for decryption and
 *                 sets the decryption key.
 *
 * \param ctx      The AES XTS context to which the key should be bound.
 *                 It must be initialized.
 * \param key      The decryption key. This is comprised of the XTS key1
 *                 concatenated with the XTS key2.
 *                 This must be a readable buffer of size \p keybits bits.
 * \param keybits  The size of \p key passed in bits. Valid options are:
 *                 <ul><li>256 bits (each of key1 and key2 is a 128-bit key)</li>
 *                 <li>512 bits (each of key1 and key2 is a 256-bit key)</li></ul>
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH on failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_xts_setkey_dec( mbedtls_aes_xts_context *ctx,
                                const unsigned char *key,
                                unsigned int keybits );
#endif /* MBEDTLS_CIPHER_MODE_XTS */

/**
 * \brief          This function performs an AES single-block encryption or
 *                 decryption operation.
 *
 *                 It performs the operation defined in the \p mode parameter
 *                 (encrypt or decrypt), on the input data buffer defined in
 *                 the \p input parameter.
 *
 *                 mbedtls_aes_init(), and either mbedtls_aes_setkey_enc() or
 *                 mbedtls_aes_setkey_dec() must be called before the first
 *                 call to this API with the same context.
 *
 * \param ctx      The AES context to use for encryption or decryption.
 *                 It must be initialized and bound to a key.
 * \param mode     The AES operation: #MBEDTLS_AES_ENCRYPT or
 *                 #MBEDTLS_AES_DECRYPT.
 * \param input    The buffer holding the input data.
 *                 It must be readable and at least \c 16 Bytes long.
 * \param output   The buffer where the output data will be written.
 *                 It must be writeable and at least \c 16 Bytes long.

 * \return         \c 0 on success.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_crypt_ecb( mbedtls_aes_context *ctx,
                    int mode,
                    const unsigned char input[16],
                    unsigned char output[16] );

#if defined(MBEDTLS_CIPHER_MODE_CBC)
/**
 * \brief  This function performs an AES-CBC encryption or decryption operation
 *         on full blocks.
 *
 *         It performs the operation defined in the \p mode
 *         parameter (encrypt/decrypt), on the input data buffer defined in
 *         the \p input parameter.
 *
 *         It can be called as many times as needed, until all the input
 *         data is processed. mbedtls_aes_init(), and either
 *         mbedtls_aes_setkey_enc() or mbedtls_aes_setkey_dec() must be called
 *         before the first call to this API with the same context.
 *
 * \note   This function operates on full blocks, that is, the input size
 *         must be a multiple of the AES block size of \c 16 Bytes.
 *
 * \note   Upon exit, the content of the IV is updated so that you can
 *         call the same function again on the next
 *         block(s) of data and get the same result as if it was
 *         encrypted in one call. This allows a "streaming" usage.
 *         If you need to retain the contents of the IV, you should
 *         either save it manually or use the cipher module instead.
 *
 *
 * \param ctx      The AES context to use for encryption or decryption.
 *                 It must be initialized and bound to a key.
 * \param mode     The AES operation: #MBEDTLS_AES_ENCRYPT or
 *                 #MBEDTLS_AES_DECRYPT.
 * \param length   The length of the input data in Bytes. This must be a
 *                 multiple of the block size (\c 16 Bytes).
 * \param iv       Initialization vector (updated after use).
 *                 It must be a readable and writeable buffer of \c 16 Bytes.
 * \param input    The buffer holding the input data.
 *                 It must be readable and of size \p length Bytes.
 * \param output   The buffer holding the output data.
 *                 It must be writeable and of size \p length Bytes.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH
 *                 on failure.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_crypt_cbc( mbedtls_aes_context *ctx,
                    int mode,
                    size_t length,
                    unsigned char iv[16],
                    const unsigned char *input,
                    unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CBC */

#if defined(MBEDTLS_CIPHER_MODE_XTS)
/**
 * \brief      This function performs an AES-XTS encryption or decryption
 *             operation for an entire XTS data unit.
 *
 *             AES-XTS encrypts or decrypts blocks based on their location as
 *             defined by a data unit number. The data unit number must be
 *             provided by \p data_unit.
 *
 *             NIST SP 800-38E limits the maximum size of a data unit to 2^20
 *             AES blocks. If the data unit is larger than this, this function
 *             returns #MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH.
 *
 * \param ctx          The AES XTS context to use for AES XTS operations.
 *                     It must be initialized and bound to a key.
 * \param mode         The AES operation: #MBEDTLS_AES_ENCRYPT or
 *                     #MBEDTLS_AES_DECRYPT.
 * \param length       The length of a data unit in Bytes. This can be any
 *                     length between 16 bytes and 2^24 bytes inclusive
 *                     (between 1 and 2^20 block cipher blocks).
 * \param data_unit    The address of the data unit encoded as an array of 16
 *                     bytes in little-endian format. For disk encryption, this
 *                     is typically the index of the block device sector that
 *                     contains the data.
 * \param input        The buffer holding the input data (which is an entire
 *                     data unit). This function reads \p length Bytes from \p
 *                     input.
 * \param output       The buffer holding the output data (which is an entire
 *                     data unit). This function writes \p length Bytes to \p
 *                     output.
 *
 * \return             \c 0 on success.
 * \return             #MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH if \p length is
 *                     smaller than an AES block in size (16 Bytes) or if \p
 *                     length is larger than 2^20 blocks (16 MiB).
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_crypt_xts( mbedtls_aes_xts_context *ctx,
                           int mode,
                           size_t length,
                           const unsigned char data_unit[16],
                           const unsigned char *input,
                           unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_XTS */

#if defined(MBEDTLS_CIPHER_MODE_CFB)
/**
 * \brief This function performs an AES-CFB128 encryption or decryption
 *        operation.
 *
 *        It performs the operation defined in the \p mode
 *        parameter (encrypt or decrypt), on the input data buffer
 *        defined in the \p input parameter.
 *
 *        For CFB, you must set up the context with mbedtls_aes_setkey_enc(),
 *        regardless of whether you are performing an encryption or decryption
 *        operation, that is, regardless of the \p mode parameter. This is
 *        because CFB mode uses the same key schedule for encryption and
 *        decryption.
 *
 * \note  Upon exit, the content of the IV is updated so that you can
 *        call the same function again on the next
 *        block(s) of data and get the same result as if it was
 *        encrypted in one call. This allows a "streaming" usage.
 *        If you need to retain the contents of the
 *        IV, you must either save it manually or use the cipher
 *        module instead.
 *
 *
 * \param ctx      The AES context to use for encryption or decryption.
 *                 It must be initialized and bound to a key.
 * \param mode     The AES operation: #MBEDTLS_AES_ENCRYPT or
 *                 #MBEDTLS_AES_DECRYPT.
 * \param length   The length of the input data in Bytes.
 * \param iv_off   The offset in IV (updated after use).
 *                 It must point to a valid \c size_t.
 * \param iv       The initialization vector (updated after use).
 *                 It must be a readable and writeable buffer of \c 16 Bytes.
 * \param input    The buffer holding the input data.
 *                 It must be readable and of size \p length Bytes.
 * \param output   The buffer holding the output data.
 *                 It must be writeable and of size \p length Bytes.
 *
 * \return         \c 0 on success.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_crypt_cfb128( mbedtls_aes_context *ctx,
                       int mode,
                       size_t length,
                       size_t *iv_off,
                       unsigned char iv[16],
                       const unsigned char *input,
                       unsigned char *output );

/**
 * \brief This function performs an AES-CFB8 encryption or decryption
 *        operation.
 *
 *        It performs the operation defined in the \p mode
 *        parameter (encrypt/decrypt), on the input data buffer defined
 *        in the \p input parameter.
 *
 *        Due to the nature of CFB, you must use the same key schedule for
 *        both encryption and decryption operations. Therefore, you must
 *        use the context initialized with mbedtls_aes_setkey_enc() for
 *        both #MBEDTLS_AES_ENCRYPT and #MBEDTLS_AES_DECRYPT.
 *
 * \note  Upon exit, the content of the IV is updated so that you can
 *        call the same function again on the next
 *        block(s) of data and get the same result as if it was
 *        encrypted in one call. This allows a "streaming" usage.
 *        If you need to retain the contents of the
 *        IV, you should either save it manually or use the cipher
 *        module instead.
 *
 *
 * \param ctx      The AES context to use for encryption or decryption.
 *                 It must be initialized and bound to a key.
 * \param mode     The AES operation: #MBEDTLS_AES_ENCRYPT or
 *                 #MBEDTLS_AES_DECRYPT
 * \param length   The length of the input data.
 * \param iv       The initialization vector (updated after use).
 *                 It must be a readable and writeable buffer of \c 16 Bytes.
 * \param input    The buffer holding the input data.
 *                 It must be readable and of size \p length Bytes.
 * \param output   The buffer holding the output data.
 *                 It must be writeable and of size \p length Bytes.
 *
 * \return         \c 0 on success.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_crypt_cfb8( mbedtls_aes_context *ctx,
                    int mode,
                    size_t length,
                    unsigned char iv[16],
                    const unsigned char *input,
                    unsigned char *output );
#endif /*MBEDTLS_CIPHER_MODE_CFB */

#if defined(MBEDTLS_CIPHER_MODE_OFB)
/**
 * \brief       This function performs an AES-OFB (Output Feedback Mode)
 *              encryption or decryption operation.
 *
 *              For OFB, you must set up the context with
 *              mbedtls_aes_setkey_enc(), regardless of whether you are
 *              performing an encryption or decryption operation. This is
 *              because OFB mode uses the same key schedule for encryption and
 *              decryption.
 *
 *              The OFB operation is identical for encryption or decryption,
 *              therefore no operation mode needs to be specified.
 *
 * \note        Upon exit, the content of iv, the Initialisation Vector, is
 *              updated so that you can call the same function again on the next
 *              block(s) of data and get the same result as if it was encrypted
 *              in one call. This allows a "streaming" usage, by initialising
 *              iv_off to 0 before the first call, and preserving its value
 *              between calls.
 *
 *              For non-streaming use, the iv should be initialised on each call
 *              to a unique value, and iv_off set to 0 on each call.
 *
 *              If you need to retain the contents of the initialisation vector,
 *              you must either save it manually or use the cipher module
 *              instead.
 *
 * \warning     For the OFB mode, the initialisation vector must be unique
 *              every encryption operation. Reuse of an initialisation vector
 *              will compromise security.
 *
 * \param ctx      The AES context to use for encryption or decryption.
 *                 It must be initialized and bound to a key.
 * \param length   The length of the input data.
 * \param iv_off   The offset in IV (updated after use).
 *                 It must point to a valid \c size_t.
 * \param iv       The initialization vector (updated after use).
 *                 It must be a readable and writeable buffer of \c 16 Bytes.
 * \param input    The buffer holding the input data.
 *                 It must be readable and of size \p length Bytes.
 * \param output   The buffer holding the output data.
 *                 It must be writeable and of size \p length Bytes.
 *
 * \return         \c 0 on success.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_crypt_ofb( mbedtls_aes_context *ctx,
                       size_t length,
                       size_t *iv_off,
                       unsigned char iv[16],
                       const unsigned char *input,
                       unsigned char *output );

#endif /* MBEDTLS_CIPHER_MODE_OFB */

#if defined(MBEDTLS_CIPHER_MODE_CTR)
/**
 * \brief      This function performs an AES-CTR encryption or decryption
 *             operation.
 *
 *             Due to the nature of CTR, you must use the same key schedule
 *             for both encryption and decryption operations. Therefore, you
 *             must use the context initialized with mbedtls_aes_setkey_enc()
 *             for both #MBEDTLS_AES_ENCRYPT and #MBEDTLS_AES_DECRYPT.
 *
 * \warning    You must never reuse a nonce value with the same key. Doing so
 *             would void the encryption for the two messages encrypted with
 *             the same nonce and key.
 *
 *             There are two common strategies for managing nonces with CTR:
 *
 *             1. You can handle everything as a single message processed over
 *             successive calls to this function. In that case, you want to
 *             set \p nonce_counter and \p nc_off to 0 for the first call, and
 *             then preserve the values of \p nonce_counter, \p nc_off and \p
 *             stream_block across calls to this function as they will be
 *             updated by this function.
 *
 *             With this strategy, you must not encrypt more than 2**128
 *             blocks of data with the same key.
 *
 *             2. You can encrypt separate messages by dividing the \p
 *             nonce_counter buffer in two areas: the first one used for a
 *             per-message nonce, handled by yourself, and the second one
 *             updated by this function internally.
 *
 *             For example, you might reserve the first 12 bytes for the
 *             per-message nonce, and the last 4 bytes for internal use. In that
 *             case, before calling this function on a new message you need to
 *             set the first 12 bytes of \p nonce_counter to your chosen nonce
 *             value, the last 4 to 0, and \p nc_off to 0 (which will cause \p
 *             stream_block to be ignored). That way, you can encrypt at most
 *             2**96 messages of up to 2**32 blocks each with the same key.
 *
 *             The per-message nonce (or information sufficient to reconstruct
 *             it) needs to be communicated with the ciphertext and must be unique.
 *             The recommended way to ensure uniqueness is to use a message
 *             counter. An alternative is to generate random nonces, but this
 *             limits the number of messages that can be securely encrypted:
 *             for example, with 96-bit random nonces, you should not encrypt
 *             more than 2**32 messages with the same key.
 *
 *             Note that for both stategies, sizes are measured in blocks and
 *             that an AES block is 16 bytes.
 *
 * \warning    Upon return, \p stream_block contains sensitive data. Its
 *             content must not be written to insecure storage and should be
 *             securely discarded as soon as it's no longer needed.
 *
 * \param ctx              The AES context to use for encryption or decryption.
 *                         It must be initialized and bound to a key.
 * \param length           The length of the input data.
 * \param nc_off           The offset in the current \p stream_block, for
 *                         resuming within the current cipher stream. The
 *                         offset pointer should be 0 at the start of a stream.
 *                         It must point to a valid \c size_t.
 * \param nonce_counter    The 128-bit nonce and counter.
 *                         It must be a readable-writeable buffer of \c 16 Bytes.
 * \param stream_block     The saved stream block for resuming. This is
 *                         overwritten by the function.
 *                         It must be a readable-writeable buffer of \c 16 Bytes.
 * \param input            The buffer holding the input data.
 *                         It must be readable and of size \p length Bytes.
 * \param output           The buffer holding the output data.
 *                         It must be writeable and of size \p length Bytes.
 *
 * \return                 \c 0 on success.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_aes_crypt_ctr( mbedtls_aes_context *ctx,
                       size_t length,
                       size_t *nc_off,
                       unsigned char nonce_counter[16],
                       unsigned char stream_block[16],
                       const unsigned char *input,
                       unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CTR */

/**
 * \brief           Internal AES block encryption function. This is only
 *                  exposed to allow overriding it using
 *                  \c MBEDTLS_AES_ENCRYPT_ALT.
 *
 * \param ctx       The AES context to use for encryption.
 * \param input     The plaintext block.
 * \param output    The output (ciphertext) block.
 *
 * \return          \c 0 on success.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_internal_aes_encrypt( mbedtls_aes_context *ctx,
                                  const unsigned char input[16],
                                  unsigned char output[16] );

/**
 * \brief           Internal AES block decryption function. This is only
 *                  exposed to allow overriding it using see
 *                  \c MBEDTLS_AES_DECRYPT_ALT.
 *
 * \param ctx       The AES context to use for decryption.
 * \param input     The ciphertext block.
 * \param output    The output (plaintext) block.
 *
 * \return          \c 0 on success.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_internal_aes_decrypt( mbedtls_aes_context *ctx,
                                  const unsigned char input[16],
                                  unsigned char output[16] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief           Deprecated internal AES block encryption function
 *                  without return value.
 *
 * \deprecated      Superseded by mbedtls_internal_aes_encrypt()
 *
 * \param ctx       The AES context to use for encryption.
 * \param input     Plaintext block.
 * \param output    Output (ciphertext) block.
 */
MBEDTLS_DEPRECATED void mbedtls_aes_encrypt( mbedtls_aes_context *ctx,
                                             const unsigned char input[16],
                                             unsigned char output[16] );

/**
 * \brief           Deprecated internal AES block decryption function
 *                  without return value.
 *
 * \deprecated      Superseded by mbedtls_internal_aes_decrypt()
 *
 * \param ctx       The AES context to use for decryption.
 * \param input     Ciphertext block.
 * \param output    Output (plaintext) block.
 */
MBEDTLS_DEPRECATED void mbedtls_aes_decrypt( mbedtls_aes_context *ctx,
                                             const unsigned char input[16],
                                             unsigned char output[16] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */


#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief          Checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
MBEDTLS_CHECK_RETURN_CRITICAL
int mbedtls_aes_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* aes.h */


/********* Start of file include/mbedtls/aesni.h ************/

/**
 * \file aesni.h
 *
 * \brief AES-NI for hardware AES acceleration on some Intel processors
 *
 * \warning These functions are only for internal use by other library
 *          functions; you must not call them directly.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_AESNI_H
#define MBEDTLS_AESNI_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#define MBEDTLS_AESNI_AES      0x02000000u
#define MBEDTLS_AESNI_CLMUL    0x00000002u

#if defined(MBEDTLS_HAVE_ASM) && defined(__GNUC__) &&  \
    ( defined(__amd64__) || defined(__x86_64__) )   &&  \
    ! defined(MBEDTLS_HAVE_X86_64)
#define MBEDTLS_HAVE_X86_64
#endif

#if defined(MBEDTLS_HAVE_X86_64)

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief          Internal function to detect the AES-NI feature in CPUs.
 *
 * \note           This function is only for internal use by other library
 *                 functions; you must not call it directly.
 *
 * \param what     The feature to detect
 *                 (MBEDTLS_AESNI_AES or MBEDTLS_AESNI_CLMUL)
 *
 * \return         1 if CPU has support for the feature, 0 otherwise
 */
int mbedtls_aesni_has_support( unsigned int what );

/**
 * \brief          Internal AES-NI AES-ECB block encryption and decryption
 *
 * \note           This function is only for internal use by other library
 *                 functions; you must not call it directly.
 *
 * \param ctx      AES context
 * \param mode     MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
 * \param input    16-byte input block
 * \param output   16-byte output block
 *
 * \return         0 on success (cannot fail)
 */
int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
                             int mode,
                             const unsigned char input[16],
                             unsigned char output[16] );

/**
 * \brief          Internal GCM multiplication: c = a * b in GF(2^128)
 *
 * \note           This function is only for internal use by other library
 *                 functions; you must not call it directly.
 *
 * \param c        Result
 * \param a        First operand
 * \param b        Second operand
 *
 * \note           Both operands and result are bit strings interpreted as
 *                 elements of GF(2^128) as per the GCM spec.
 */
void mbedtls_aesni_gcm_mult( unsigned char c[16],
                             const unsigned char a[16],
                             const unsigned char b[16] );

/**
 * \brief           Internal round key inversion. This function computes
 *                  decryption round keys from the encryption round keys.
 *
 * \note            This function is only for internal use by other library
 *                  functions; you must not call it directly.
 *
 * \param invkey    Round keys for the equivalent inverse cipher
 * \param fwdkey    Original round keys (for encryption)
 * \param nr        Number of rounds (that is, number of round keys minus one)
 */
void mbedtls_aesni_inverse_key( unsigned char *invkey,
                                const unsigned char *fwdkey,
                                int nr );

/**
 * \brief           Internal key expansion for encryption
 *
 * \note            This function is only for internal use by other library
 *                  functions; you must not call it directly.
 *
 * \param rk        Destination buffer where the round keys are written
 * \param key       Encryption key
 * \param bits      Key size in bits (must be 128, 192 or 256)
 *
 * \return          0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
 */
int mbedtls_aesni_setkey_enc( unsigned char *rk,
                              const unsigned char *key,
                              size_t bits );

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_HAVE_X86_64 */

#endif /* MBEDTLS_AESNI_H */


/********* Start of file include/mbedtls/arc4.h ************/

/**
 * \file arc4.h
 *
 * \brief The ARCFOUR stream cipher
 *
 * \warning   ARC4 is considered a weak cipher and its use constitutes a
 *            security risk. We recommend considering stronger ciphers instead.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
#ifndef MBEDTLS_ARC4_H
#define MBEDTLS_ARC4_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

/* MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED is deprecated and should not be used. */
/** ARC4 hardware accelerator failed. */
#define MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED                  -0x0019

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_ARC4_ALT)
// Regular implementation
//

/**
 * \brief     ARC4 context structure
 *
 * \warning   ARC4 is considered a weak cipher and its use constitutes a
 *            security risk. We recommend considering stronger ciphers instead.
 *
 */
typedef struct mbedtls_arc4_context
{
    int x;                      /*!< permutation index */
    int y;                      /*!< permutation index */
    unsigned char m[256];       /*!< permutation table */
}
mbedtls_arc4_context;

#else  /* MBEDTLS_ARC4_ALT */

#endif /* MBEDTLS_ARC4_ALT */

/**
 * \brief          Initialize ARC4 context
 *
 * \param ctx      ARC4 context to be initialized
 *
 * \warning        ARC4 is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 *
 */
void mbedtls_arc4_init( mbedtls_arc4_context *ctx );

/**
 * \brief          Clear ARC4 context
 *
 * \param ctx      ARC4 context to be cleared
 *
 * \warning        ARC4 is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 *
 */
void mbedtls_arc4_free( mbedtls_arc4_context *ctx );

/**
 * \brief          ARC4 key schedule
 *
 * \param ctx      ARC4 context to be setup
 * \param key      the secret key
 * \param keylen   length of the key, in bytes
 *
 * \warning        ARC4 is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 *
 */
void mbedtls_arc4_setup( mbedtls_arc4_context *ctx, const unsigned char *key,
                 unsigned int keylen );

/**
 * \brief          ARC4 cipher function
 *
 * \param ctx      ARC4 context
 * \param length   length of the input data
 * \param input    buffer holding the input data
 * \param output   buffer for the output data
 *
 * \return         0 if successful
 *
 * \warning        ARC4 is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 *
 */
int mbedtls_arc4_crypt( mbedtls_arc4_context *ctx, size_t length, const unsigned char *input,
                unsigned char *output );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 *
 * \warning        ARC4 is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 *
 */
int mbedtls_arc4_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* arc4.h */


/********* Start of file include/mbedtls/base64.h ************/

/**
 * \file base64.h
 *
 * \brief RFC 1521 base64 encoding/decoding
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_BASE64_H
#define MBEDTLS_BASE64_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

/** Output buffer too small. */
#define MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL               -0x002A
/** Invalid character in input. */
#define MBEDTLS_ERR_BASE64_INVALID_CHARACTER              -0x002C

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief          Encode a buffer into base64 format
 *
 * \param dst      destination buffer
 * \param dlen     size of the destination buffer
 * \param olen     number of bytes written
 * \param src      source buffer
 * \param slen     amount of data to be encoded
 *
 * \return         0 if successful, or MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL.
 *                 *olen is always updated to reflect the amount
 *                 of data that has (or would have) been written.
 *                 If that length cannot be represented, then no data is
 *                 written to the buffer and *olen is set to the maximum
 *                 length representable as a size_t.
 *
 * \note           Call this function with dlen = 0 to obtain the
 *                 required buffer size in *olen
 */
int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen,
                   const unsigned char *src, size_t slen );

/**
 * \brief          Decode a base64-formatted buffer
 *
 * \param dst      destination buffer (can be NULL for checking size)
 * \param dlen     size of the destination buffer
 * \param olen     number of bytes written
 * \param src      source buffer
 * \param slen     amount of data to be decoded
 *
 * \return         0 if successful, MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL, or
 *                 MBEDTLS_ERR_BASE64_INVALID_CHARACTER if the input data is
 *                 not correct. *olen is always updated to reflect the amount
 *                 of data that has (or would have) been written.
 *
 * \note           Call this function with *dst = NULL or dlen = 0 to obtain
 *                 the required buffer size in *olen
 */
int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
                   const unsigned char *src, size_t slen );

#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int mbedtls_base64_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* base64.h */


/********* Start of file include/mbedtls/bn_mul.h ************/

/**
 * \file bn_mul.h
 *
 * \brief Multi-precision integer library
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
/*
 *      Multiply source vector [s] with b, add result
 *       to destination vector [d] and set carry c.
 *
 *      Currently supports:
 *
 *         . IA-32 (386+)         . AMD64 / EM64T
 *         . IA-32 (SSE2)         . Motorola 68000
 *         . PowerPC, 32-bit      . MicroBlaze
 *         . PowerPC, 64-bit      . TriCore
 *         . SPARC v8             . ARM v3+
 *         . Alpha                . MIPS32
 *         . C, longlong          . C, generic
 */
#ifndef MBEDTLS_BN_MUL_H
#define MBEDTLS_BN_MUL_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif




/*
 * Conversion macros for embedded constants:
 * build lists of mbedtls_mpi_uint's from lists of unsigned char's grouped by 8, 4 or 2
 */
#if defined(MBEDTLS_HAVE_INT32)

#define MBEDTLS_BYTES_TO_T_UINT_4( a, b, c, d )               \
    ( (mbedtls_mpi_uint) (a) <<  0 ) |                        \
    ( (mbedtls_mpi_uint) (b) <<  8 ) |                        \
    ( (mbedtls_mpi_uint) (c) << 16 ) |                        \
    ( (mbedtls_mpi_uint) (d) << 24 )

#define MBEDTLS_BYTES_TO_T_UINT_2( a, b )                   \
    MBEDTLS_BYTES_TO_T_UINT_4( a, b, 0, 0 )

#define MBEDTLS_BYTES_TO_T_UINT_8( a, b, c, d, e, f, g, h ) \
    MBEDTLS_BYTES_TO_T_UINT_4( a, b, c, d ),                \
    MBEDTLS_BYTES_TO_T_UINT_4( e, f, g, h )

#else /* 64-bits */

#define MBEDTLS_BYTES_TO_T_UINT_8( a, b, c, d, e, f, g, h )   \
    ( (mbedtls_mpi_uint) (a) <<  0 ) |                        \
    ( (mbedtls_mpi_uint) (b) <<  8 ) |                        \
    ( (mbedtls_mpi_uint) (c) << 16 ) |                        \
    ( (mbedtls_mpi_uint) (d) << 24 ) |                        \
    ( (mbedtls_mpi_uint) (e) << 32 ) |                        \
    ( (mbedtls_mpi_uint) (f) << 40 ) |                        \
    ( (mbedtls_mpi_uint) (g) << 48 ) |                        \
    ( (mbedtls_mpi_uint) (h) << 56 )

#define MBEDTLS_BYTES_TO_T_UINT_4( a, b, c, d )             \
    MBEDTLS_BYTES_TO_T_UINT_8( a, b, c, d, 0, 0, 0, 0 )

#define MBEDTLS_BYTES_TO_T_UINT_2( a, b )                   \
    MBEDTLS_BYTES_TO_T_UINT_8( a, b, 0, 0, 0, 0, 0, 0 )

#endif /* bits in mbedtls_mpi_uint */

#if defined(MBEDTLS_HAVE_ASM)

#ifndef asm
#define asm __asm
#endif

/* armcc5 --gnu defines __GNUC__ but doesn't support GNU's extended asm */
#if defined(__GNUC__) && \
    ( !defined(__ARMCC_VERSION) || __ARMCC_VERSION >= 6000000 )

/*
 * Disable use of the i386 assembly code below if option -O0, to disable all
 * compiler optimisations, is passed, detected with __OPTIMIZE__
 * This is done as the number of registers used in the assembly code doesn't
 * work with the -O0 option.
 */
#if defined(__i386__) && defined(__OPTIMIZE__)

#define MULADDC_INIT                        \
    asm(                                    \
        "movl   %%ebx, %0           \n\t"   \
        "movl   %5, %%esi           \n\t"   \
        "movl   %6, %%edi           \n\t"   \
        "movl   %7, %%ecx           \n\t"   \
        "movl   %8, %%ebx           \n\t"

#define MULADDC_CORE                        \
        "lodsl                      \n\t"   \
        "mull   %%ebx               \n\t"   \
        "addl   %%ecx,   %%eax      \n\t"   \
        "adcl   $0,      %%edx      \n\t"   \
        "addl   (%%edi), %%eax      \n\t"   \
        "adcl   $0,      %%edx      \n\t"   \
        "movl   %%edx,   %%ecx      \n\t"   \
        "stosl                      \n\t"

#if defined(MBEDTLS_HAVE_SSE2)

#define MULADDC_HUIT                            \
        "movd     %%ecx,     %%mm1      \n\t"   \
        "movd     %%ebx,     %%mm0      \n\t"   \
        "movd     (%%edi),   %%mm3      \n\t"   \
        "paddq    %%mm3,     %%mm1      \n\t"   \
        "movd     (%%esi),   %%mm2      \n\t"   \
        "pmuludq  %%mm0,     %%mm2      \n\t"   \
        "movd     4(%%esi),  %%mm4      \n\t"   \
        "pmuludq  %%mm0,     %%mm4      \n\t"   \
        "movd     8(%%esi),  %%mm6      \n\t"   \
        "pmuludq  %%mm0,     %%mm6      \n\t"   \
        "movd     12(%%esi), %%mm7      \n\t"   \
        "pmuludq  %%mm0,     %%mm7      \n\t"   \
        "paddq    %%mm2,     %%mm1      \n\t"   \
        "movd     4(%%edi),  %%mm3      \n\t"   \
        "paddq    %%mm4,     %%mm3      \n\t"   \
        "movd     8(%%edi),  %%mm5      \n\t"   \
        "paddq    %%mm6,     %%mm5      \n\t"   \
        "movd     12(%%edi), %%mm4      \n\t"   \
        "paddq    %%mm4,     %%mm7      \n\t"   \
        "movd     %%mm1,     (%%edi)    \n\t"   \
        "movd     16(%%esi), %%mm2      \n\t"   \
        "pmuludq  %%mm0,     %%mm2      \n\t"   \
        "psrlq    $32,       %%mm1      \n\t"   \
        "movd     20(%%esi), %%mm4      \n\t"   \
        "pmuludq  %%mm0,     %%mm4      \n\t"   \
        "paddq    %%mm3,     %%mm1      \n\t"   \
        "movd     24(%%esi), %%mm6      \n\t"   \
        "pmuludq  %%mm0,     %%mm6      \n\t"   \
        "movd     %%mm1,     4(%%edi)   \n\t"   \
        "psrlq    $32,       %%mm1      \n\t"   \
        "movd     28(%%esi), %%mm3      \n\t"   \
        "pmuludq  %%mm0,     %%mm3      \n\t"   \
        "paddq    %%mm5,     %%mm1      \n\t"   \
        "movd     16(%%edi), %%mm5      \n\t"   \
        "paddq    %%mm5,     %%mm2      \n\t"   \
        "movd     %%mm1,     8(%%edi)   \n\t"   \
        "psrlq    $32,       %%mm1      \n\t"   \
        "paddq    %%mm7,     %%mm1      \n\t"   \
        "movd     20(%%edi), %%mm5      \n\t"   \
        "paddq    %%mm5,     %%mm4      \n\t"   \
        "movd     %%mm1,     12(%%edi)  \n\t"   \
        "psrlq    $32,       %%mm1      \n\t"   \
        "paddq    %%mm2,     %%mm1      \n\t"   \
        "movd     24(%%edi), %%mm5      \n\t"   \
        "paddq    %%mm5,     %%mm6      \n\t"   \
        "movd     %%mm1,     16(%%edi)  \n\t"   \
        "psrlq    $32,       %%mm1      \n\t"   \
        "paddq    %%mm4,     %%mm1      \n\t"   \
        "movd     28(%%edi), %%mm5      \n\t"   \
        "paddq    %%mm5,     %%mm3      \n\t"   \
        "movd     %%mm1,     20(%%edi)  \n\t"   \
        "psrlq    $32,       %%mm1      \n\t"   \
        "paddq    %%mm6,     %%mm1      \n\t"   \
        "movd     %%mm1,     24(%%edi)  \n\t"   \
        "psrlq    $32,       %%mm1      \n\t"   \
        "paddq    %%mm3,     %%mm1      \n\t"   \
        "movd     %%mm1,     28(%%edi)  \n\t"   \
        "addl     $32,       %%edi      \n\t"   \
        "addl     $32,       %%esi      \n\t"   \
        "psrlq    $32,       %%mm1      \n\t"   \
        "movd     %%mm1,     %%ecx      \n\t"

#define MULADDC_STOP                    \
        "emms                   \n\t"   \
        "movl   %4, %%ebx       \n\t"   \
        "movl   %%ecx, %1       \n\t"   \
        "movl   %%edi, %2       \n\t"   \
        "movl   %%esi, %3       \n\t"   \
        : "=m" (t), "=m" (c), "=m" (d), "=m" (s)        \
        : "m" (t), "m" (s), "m" (d), "m" (c), "m" (b)   \
        : "eax", "ebx", "ecx", "edx", "esi", "edi"      \
    );

#else

#define MULADDC_STOP                    \
        "movl   %4, %%ebx       \n\t"   \
        "movl   %%ecx, %1       \n\t"   \
        "movl   %%edi, %2       \n\t"   \
        "movl   %%esi, %3       \n\t"   \
        : "=m" (t), "=m" (c), "=m" (d), "=m" (s)        \
        : "m" (t), "m" (s), "m" (d), "m" (c), "m" (b)   \
        : "eax", "ebx", "ecx", "edx", "esi", "edi"      \
    );
#endif /* SSE2 */
#endif /* i386 */

#if defined(__amd64__) || defined (__x86_64__)

#define MULADDC_INIT                        \
    asm(                                    \
        "xorq   %%r8, %%r8\n"

#define MULADDC_CORE                        \
        "movq   (%%rsi), %%rax\n"           \
        "mulq   %%rbx\n"                    \
        "addq   $8, %%rsi\n"                \
        "addq   %%rcx, %%rax\n"             \
        "movq   %%r8, %%rcx\n"              \
        "adcq   $0, %%rdx\n"                \
        "nop    \n"                         \
        "addq   %%rax, (%%rdi)\n"           \
        "adcq   %%rdx, %%rcx\n"             \
        "addq   $8, %%rdi\n"

#define MULADDC_STOP                        \
        : "+c" (c), "+D" (d), "+S" (s), "+m" (*(uint64_t (*)[16]) d) \
        : "b" (b), "m" (*(const uint64_t (*)[16]) s)                 \
        : "rax", "rdx", "r8"                                         \
    );

#endif /* AMD64 */

#if defined(__aarch64__)

#define MULADDC_INIT                \
    asm(

#define MULADDC_CORE                \
        "ldr x4, [%2], #8   \n\t"   \
        "ldr x5, [%1]       \n\t"   \
        "mul x6, x4, %4     \n\t"   \
        "umulh x7, x4, %4   \n\t"   \
        "adds x5, x5, x6    \n\t"   \
        "adc x7, x7, xzr    \n\t"   \
        "adds x5, x5, %0    \n\t"   \
        "adc %0, x7, xzr    \n\t"   \
        "str x5, [%1], #8   \n\t"

#define MULADDC_STOP                                                    \
         : "+r" (c),  "+r" (d), "+r" (s), "+m" (*(uint64_t (*)[16]) d)  \
         : "r" (b), "m" (*(const uint64_t (*)[16]) s)                   \
         : "x4", "x5", "x6", "x7", "cc"                                 \
    );

#endif /* Aarch64 */

#if defined(__mc68020__) || defined(__mcpu32__)

#define MULADDC_INIT                    \
    asm(                                \
        "movl   %3, %%a2        \n\t"   \
        "movl   %4, %%a3        \n\t"   \
        "movl   %5, %%d3        \n\t"   \
        "movl   %6, %%d2        \n\t"   \
        "moveq  #0, %%d0        \n\t"

#define MULADDC_CORE                    \
        "movel  %%a2@+, %%d1    \n\t"   \
        "mulul  %%d2, %%d4:%%d1 \n\t"   \
        "addl   %%d3, %%d1      \n\t"   \
        "addxl  %%d0, %%d4      \n\t"   \
        "moveq  #0,   %%d3      \n\t"   \
        "addl   %%d1, %%a3@+    \n\t"   \
        "addxl  %%d4, %%d3      \n\t"

#define MULADDC_STOP                    \
        "movl   %%d3, %0        \n\t"   \
        "movl   %%a3, %1        \n\t"   \
        "movl   %%a2, %2        \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)              \
        : "m" (s), "m" (d), "m" (c), "m" (b)        \
        : "d0", "d1", "d2", "d3", "d4", "a2", "a3"  \
    );

#define MULADDC_HUIT                        \
        "movel  %%a2@+,  %%d1       \n\t"   \
        "mulul  %%d2,    %%d4:%%d1  \n\t"   \
        "addxl  %%d3,    %%d1       \n\t"   \
        "addxl  %%d0,    %%d4       \n\t"   \
        "addl   %%d1,    %%a3@+     \n\t"   \
        "movel  %%a2@+,  %%d1       \n\t"   \
        "mulul  %%d2,    %%d3:%%d1  \n\t"   \
        "addxl  %%d4,    %%d1       \n\t"   \
        "addxl  %%d0,    %%d3       \n\t"   \
        "addl   %%d1,    %%a3@+     \n\t"   \
        "movel  %%a2@+,  %%d1       \n\t"   \
        "mulul  %%d2,    %%d4:%%d1  \n\t"   \
        "addxl  %%d3,    %%d1       \n\t"   \
        "addxl  %%d0,    %%d4       \n\t"   \
        "addl   %%d1,    %%a3@+     \n\t"   \
        "movel  %%a2@+,  %%d1       \n\t"   \
        "mulul  %%d2,    %%d3:%%d1  \n\t"   \
        "addxl  %%d4,    %%d1       \n\t"   \
        "addxl  %%d0,    %%d3       \n\t"   \
        "addl   %%d1,    %%a3@+     \n\t"   \
        "movel  %%a2@+,  %%d1       \n\t"   \
        "mulul  %%d2,    %%d4:%%d1  \n\t"   \
        "addxl  %%d3,    %%d1       \n\t"   \
        "addxl  %%d0,    %%d4       \n\t"   \
        "addl   %%d1,    %%a3@+     \n\t"   \
        "movel  %%a2@+,  %%d1       \n\t"   \
        "mulul  %%d2,    %%d3:%%d1  \n\t"   \
        "addxl  %%d4,    %%d1       \n\t"   \
        "addxl  %%d0,    %%d3       \n\t"   \
        "addl   %%d1,    %%a3@+     \n\t"   \
        "movel  %%a2@+,  %%d1       \n\t"   \
        "mulul  %%d2,    %%d4:%%d1  \n\t"   \
        "addxl  %%d3,    %%d1       \n\t"   \
        "addxl  %%d0,    %%d4       \n\t"   \
        "addl   %%d1,    %%a3@+     \n\t"   \
        "movel  %%a2@+,  %%d1       \n\t"   \
        "mulul  %%d2,    %%d3:%%d1  \n\t"   \
        "addxl  %%d4,    %%d1       \n\t"   \
        "addxl  %%d0,    %%d3       \n\t"   \
        "addl   %%d1,    %%a3@+     \n\t"   \
        "addxl  %%d0,    %%d3       \n\t"

#endif /* MC68000 */

#if defined(__powerpc64__) || defined(__ppc64__)

#if defined(__MACH__) && defined(__APPLE__)

#define MULADDC_INIT                        \
    asm(                                    \
        "ld     r3, %3              \n\t"   \
        "ld     r4, %4              \n\t"   \
        "ld     r5, %5              \n\t"   \
        "ld     r6, %6              \n\t"   \
        "addi   r3, r3, -8          \n\t"   \
        "addi   r4, r4, -8          \n\t"   \
        "addic  r5, r5,  0          \n\t"

#define MULADDC_CORE                        \
        "ldu    r7, 8(r3)           \n\t"   \
        "mulld  r8, r7, r6          \n\t"   \
        "mulhdu r9, r7, r6          \n\t"   \
        "adde   r8, r8, r5          \n\t"   \
        "ld     r7, 8(r4)           \n\t"   \
        "addze  r5, r9              \n\t"   \
        "addc   r8, r8, r7          \n\t"   \
        "stdu   r8, 8(r4)           \n\t"

#define MULADDC_STOP                        \
        "addze  r5, r5              \n\t"   \
        "addi   r4, r4, 8           \n\t"   \
        "addi   r3, r3, 8           \n\t"   \
        "std    r5, %0              \n\t"   \
        "std    r4, %1              \n\t"   \
        "std    r3, %2              \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)              \
        : "m" (s), "m" (d), "m" (c), "m" (b)        \
        : "r3", "r4", "r5", "r6", "r7", "r8", "r9"  \
    );


#else /* __MACH__ && __APPLE__ */

#define MULADDC_INIT                        \
    asm(                                    \
        "ld     %%r3, %3            \n\t"   \
        "ld     %%r4, %4            \n\t"   \
        "ld     %%r5, %5            \n\t"   \
        "ld     %%r6, %6            \n\t"   \
        "addi   %%r3, %%r3, -8      \n\t"   \
        "addi   %%r4, %%r4, -8      \n\t"   \
        "addic  %%r5, %%r5,  0      \n\t"

#define MULADDC_CORE                        \
        "ldu    %%r7, 8(%%r3)       \n\t"   \
        "mulld  %%r8, %%r7, %%r6    \n\t"   \
        "mulhdu %%r9, %%r7, %%r6    \n\t"   \
        "adde   %%r8, %%r8, %%r5    \n\t"   \
        "ld     %%r7, 8(%%r4)       \n\t"   \
        "addze  %%r5, %%r9          \n\t"   \
        "addc   %%r8, %%r8, %%r7    \n\t"   \
        "stdu   %%r8, 8(%%r4)       \n\t"

#define MULADDC_STOP                        \
        "addze  %%r5, %%r5          \n\t"   \
        "addi   %%r4, %%r4, 8       \n\t"   \
        "addi   %%r3, %%r3, 8       \n\t"   \
        "std    %%r5, %0            \n\t"   \
        "std    %%r4, %1            \n\t"   \
        "std    %%r3, %2            \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)              \
        : "m" (s), "m" (d), "m" (c), "m" (b)        \
        : "r3", "r4", "r5", "r6", "r7", "r8", "r9"  \
    );

#endif /* __MACH__ && __APPLE__ */

#elif defined(__powerpc__) || defined(__ppc__) /* end PPC64/begin PPC32  */

#if defined(__MACH__) && defined(__APPLE__)

#define MULADDC_INIT                    \
    asm(                                \
        "lwz    r3, %3          \n\t"   \
        "lwz    r4, %4          \n\t"   \
        "lwz    r5, %5          \n\t"   \
        "lwz    r6, %6          \n\t"   \
        "addi   r3, r3, -4      \n\t"   \
        "addi   r4, r4, -4      \n\t"   \
        "addic  r5, r5,  0      \n\t"

#define MULADDC_CORE                    \
        "lwzu   r7, 4(r3)       \n\t"   \
        "mullw  r8, r7, r6      \n\t"   \
        "mulhwu r9, r7, r6      \n\t"   \
        "adde   r8, r8, r5      \n\t"   \
        "lwz    r7, 4(r4)       \n\t"   \
        "addze  r5, r9          \n\t"   \
        "addc   r8, r8, r7      \n\t"   \
        "stwu   r8, 4(r4)       \n\t"

#define MULADDC_STOP                    \
        "addze  r5, r5          \n\t"   \
        "addi   r4, r4, 4       \n\t"   \
        "addi   r3, r3, 4       \n\t"   \
        "stw    r5, %0          \n\t"   \
        "stw    r4, %1          \n\t"   \
        "stw    r3, %2          \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)              \
        : "m" (s), "m" (d), "m" (c), "m" (b)        \
        : "r3", "r4", "r5", "r6", "r7", "r8", "r9"  \
    );

#else /* __MACH__ && __APPLE__ */

#define MULADDC_INIT                        \
    asm(                                    \
        "lwz    %%r3, %3            \n\t"   \
        "lwz    %%r4, %4            \n\t"   \
        "lwz    %%r5, %5            \n\t"   \
        "lwz    %%r6, %6            \n\t"   \
        "addi   %%r3, %%r3, -4      \n\t"   \
        "addi   %%r4, %%r4, -4      \n\t"   \
        "addic  %%r5, %%r5,  0      \n\t"

#define MULADDC_CORE                        \
        "lwzu   %%r7, 4(%%r3)       \n\t"   \
        "mullw  %%r8, %%r7, %%r6    \n\t"   \
        "mulhwu %%r9, %%r7, %%r6    \n\t"   \
        "adde   %%r8, %%r8, %%r5    \n\t"   \
        "lwz    %%r7, 4(%%r4)       \n\t"   \
        "addze  %%r5, %%r9          \n\t"   \
        "addc   %%r8, %%r8, %%r7    \n\t"   \
        "stwu   %%r8, 4(%%r4)       \n\t"

#define MULADDC_STOP                        \
        "addze  %%r5, %%r5          \n\t"   \
        "addi   %%r4, %%r4, 4       \n\t"   \
        "addi   %%r3, %%r3, 4       \n\t"   \
        "stw    %%r5, %0            \n\t"   \
        "stw    %%r4, %1            \n\t"   \
        "stw    %%r3, %2            \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)              \
        : "m" (s), "m" (d), "m" (c), "m" (b)        \
        : "r3", "r4", "r5", "r6", "r7", "r8", "r9"  \
    );

#endif /* __MACH__ && __APPLE__ */

#endif /* PPC32 */

/*
 * The Sparc(64) assembly is reported to be broken.
 * Disable it for now, until we're able to fix it.
 */
#if 0 && defined(__sparc__)
#if defined(__sparc64__)

#define MULADDC_INIT                                    \
    asm(                                                \
                "ldx     %3, %%o0               \n\t"   \
                "ldx     %4, %%o1               \n\t"   \
                "ld      %5, %%o2               \n\t"   \
                "ld      %6, %%o3               \n\t"

#define MULADDC_CORE                                    \
                "ld      [%%o0], %%o4           \n\t"   \
                "inc     4, %%o0                \n\t"   \
                "ld      [%%o1], %%o5           \n\t"   \
                "umul    %%o3, %%o4, %%o4       \n\t"   \
                "addcc   %%o4, %%o2, %%o4       \n\t"   \
                "rd      %%y, %%g1              \n\t"   \
                "addx    %%g1, 0, %%g1          \n\t"   \
                "addcc   %%o4, %%o5, %%o4       \n\t"   \
                "st      %%o4, [%%o1]           \n\t"   \
                "addx    %%g1, 0, %%o2          \n\t"   \
                "inc     4, %%o1                \n\t"

        #define MULADDC_STOP                            \
                "st      %%o2, %0               \n\t"   \
                "stx     %%o1, %1               \n\t"   \
                "stx     %%o0, %2               \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)          \
        : "m" (s), "m" (d), "m" (c), "m" (b)    \
        : "g1", "o0", "o1", "o2", "o3", "o4",   \
          "o5"                                  \
        );

#else /* __sparc64__ */

#define MULADDC_INIT                                    \
    asm(                                                \
                "ld      %3, %%o0               \n\t"   \
                "ld      %4, %%o1               \n\t"   \
                "ld      %5, %%o2               \n\t"   \
                "ld      %6, %%o3               \n\t"

#define MULADDC_CORE                                    \
                "ld      [%%o0], %%o4           \n\t"   \
                "inc     4, %%o0                \n\t"   \
                "ld      [%%o1], %%o5           \n\t"   \
                "umul    %%o3, %%o4, %%o4       \n\t"   \
                "addcc   %%o4, %%o2, %%o4       \n\t"   \
                "rd      %%y, %%g1              \n\t"   \
                "addx    %%g1, 0, %%g1          \n\t"   \
                "addcc   %%o4, %%o5, %%o4       \n\t"   \
                "st      %%o4, [%%o1]           \n\t"   \
                "addx    %%g1, 0, %%o2          \n\t"   \
                "inc     4, %%o1                \n\t"

#define MULADDC_STOP                                    \
                "st      %%o2, %0               \n\t"   \
                "st      %%o1, %1               \n\t"   \
                "st      %%o0, %2               \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)          \
        : "m" (s), "m" (d), "m" (c), "m" (b)    \
        : "g1", "o0", "o1", "o2", "o3", "o4",   \
          "o5"                                  \
        );

#endif /* __sparc64__ */
#endif /* __sparc__ */

#if defined(__microblaze__) || defined(microblaze)

#define MULADDC_INIT                    \
    asm(                                \
        "lwi   r3,   %3         \n\t"   \
        "lwi   r4,   %4         \n\t"   \
        "lwi   r5,   %5         \n\t"   \
        "lwi   r6,   %6         \n\t"   \
        "andi  r7,   r6, 0xffff \n\t"   \
        "bsrli r6,   r6, 16     \n\t"

#define MULADDC_CORE                    \
        "lhui  r8,   r3,   0    \n\t"   \
        "addi  r3,   r3,   2    \n\t"   \
        "lhui  r9,   r3,   0    \n\t"   \
        "addi  r3,   r3,   2    \n\t"   \
        "mul   r10,  r9,  r6    \n\t"   \
        "mul   r11,  r8,  r7    \n\t"   \
        "mul   r12,  r9,  r7    \n\t"   \
        "mul   r13,  r8,  r6    \n\t"   \
        "bsrli  r8, r10,  16    \n\t"   \
        "bsrli  r9, r11,  16    \n\t"   \
        "add   r13, r13,  r8    \n\t"   \
        "add   r13, r13,  r9    \n\t"   \
        "bslli r10, r10,  16    \n\t"   \
        "bslli r11, r11,  16    \n\t"   \
        "add   r12, r12, r10    \n\t"   \
        "addc  r13, r13,  r0    \n\t"   \
        "add   r12, r12, r11    \n\t"   \
        "addc  r13, r13,  r0    \n\t"   \
        "lwi   r10,  r4,   0    \n\t"   \
        "add   r12, r12, r10    \n\t"   \
        "addc  r13, r13,  r0    \n\t"   \
        "add   r12, r12,  r5    \n\t"   \
        "addc   r5, r13,  r0    \n\t"   \
        "swi   r12,  r4,   0    \n\t"   \
        "addi   r4,  r4,   4    \n\t"

#define MULADDC_STOP                    \
        "swi   r5,   %0         \n\t"   \
        "swi   r4,   %1         \n\t"   \
        "swi   r3,   %2         \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)              \
        : "m" (s), "m" (d), "m" (c), "m" (b)        \
        : "r3", "r4", "r5", "r6", "r7", "r8",       \
          "r9", "r10", "r11", "r12", "r13"          \
    );

#endif /* MicroBlaze */

#if defined(__tricore__)

#define MULADDC_INIT                            \
    asm(                                        \
        "ld.a   %%a2, %3                \n\t"   \
        "ld.a   %%a3, %4                \n\t"   \
        "ld.w   %%d4, %5                \n\t"   \
        "ld.w   %%d1, %6                \n\t"   \
        "xor    %%d5, %%d5              \n\t"

#define MULADDC_CORE                            \
        "ld.w   %%d0,   [%%a2+]         \n\t"   \
        "madd.u %%e2, %%e4, %%d0, %%d1  \n\t"   \
        "ld.w   %%d0,   [%%a3]          \n\t"   \
        "addx   %%d2,    %%d2,  %%d0    \n\t"   \
        "addc   %%d3,    %%d3,    0     \n\t"   \
        "mov    %%d4,    %%d3           \n\t"   \
        "st.w  [%%a3+],  %%d2           \n\t"

#define MULADDC_STOP                            \
        "st.w   %0, %%d4                \n\t"   \
        "st.a   %1, %%a3                \n\t"   \
        "st.a   %2, %%a2                \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)          \
        : "m" (s), "m" (d), "m" (c), "m" (b)    \
        : "d0", "d1", "e2", "d4", "a2", "a3"    \
    );

#endif /* TriCore */

/*
 * Note, gcc -O0 by default uses r7 for the frame pointer, so it complains about
 * our use of r7 below, unless -fomit-frame-pointer is passed.
 *
 * On the other hand, -fomit-frame-pointer is implied by any -Ox options with
 * x !=0, which we can detect using __OPTIMIZE__ (which is also defined by
 * clang and armcc5 under the same conditions).
 *
 * So, only use the optimized assembly below for optimized build, which avoids
 * the build error and is pretty reasonable anyway.
 */
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
#define MULADDC_CANNOT_USE_R7
#endif

#if defined(__arm__) && !defined(MULADDC_CANNOT_USE_R7)

#if defined(__thumb__) && !defined(__thumb2__)

#define MULADDC_INIT                                    \
    asm(                                                \
            "ldr    r0, %3                      \n\t"   \
            "ldr    r1, %4                      \n\t"   \
            "ldr    r2, %5                      \n\t"   \
            "ldr    r3, %6                      \n\t"   \
            "lsr    r7, r3, #16                 \n\t"   \
            "mov    r9, r7                      \n\t"   \
            "lsl    r7, r3, #16                 \n\t"   \
            "lsr    r7, r7, #16                 \n\t"   \
            "mov    r8, r7                      \n\t"

#define MULADDC_CORE                                    \
            "ldmia  r0!, {r6}                   \n\t"   \
            "lsr    r7, r6, #16                 \n\t"   \
            "lsl    r6, r6, #16                 \n\t"   \
            "lsr    r6, r6, #16                 \n\t"   \
            "mov    r4, r8                      \n\t"   \
            "mul    r4, r6                      \n\t"   \
            "mov    r3, r9                      \n\t"   \
            "mul    r6, r3                      \n\t"   \
            "mov    r5, r9                      \n\t"   \
            "mul    r5, r7                      \n\t"   \
            "mov    r3, r8                      \n\t"   \
            "mul    r7, r3                      \n\t"   \
            "lsr    r3, r6, #16                 \n\t"   \
            "add    r5, r5, r3                  \n\t"   \
            "lsr    r3, r7, #16                 \n\t"   \
            "add    r5, r5, r3                  \n\t"   \
            "add    r4, r4, r2                  \n\t"   \
            "mov    r2, #0                      \n\t"   \
            "adc    r5, r2                      \n\t"   \
            "lsl    r3, r6, #16                 \n\t"   \
            "add    r4, r4, r3                  \n\t"   \
            "adc    r5, r2                      \n\t"   \
            "lsl    r3, r7, #16                 \n\t"   \
            "add    r4, r4, r3                  \n\t"   \
            "adc    r5, r2                      \n\t"   \
            "ldr    r3, [r1]                    \n\t"   \
            "add    r4, r4, r3                  \n\t"   \
            "adc    r2, r5                      \n\t"   \
            "stmia  r1!, {r4}                   \n\t"

#define MULADDC_STOP                                    \
            "str    r2, %0                      \n\t"   \
            "str    r1, %1                      \n\t"   \
            "str    r0, %2                      \n\t"   \
         : "=m" (c),  "=m" (d), "=m" (s)        \
         : "m" (s), "m" (d), "m" (c), "m" (b)   \
         : "r0", "r1", "r2", "r3", "r4", "r5",  \
           "r6", "r7", "r8", "r9", "cc"         \
         );

#elif (__ARM_ARCH >= 6) && \
    defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)

#define MULADDC_INIT                            \
    asm(

#define MULADDC_CORE                            \
            "ldr    r0, [%0], #4        \n\t"   \
            "ldr    r1, [%1]            \n\t"   \
            "umaal  r1, %2, %3, r0      \n\t"   \
            "str    r1, [%1], #4        \n\t"

#define MULADDC_STOP                            \
         : "=r" (s),  "=r" (d), "=r" (c)        \
         : "r" (b), "0" (s), "1" (d), "2" (c)   \
         : "r0", "r1", "memory"                 \
         );

#else

#define MULADDC_INIT                                    \
    asm(                                                \
            "ldr    r0, %3                      \n\t"   \
            "ldr    r1, %4                      \n\t"   \
            "ldr    r2, %5                      \n\t"   \
            "ldr    r3, %6                      \n\t"

#define MULADDC_CORE                                    \
            "ldr    r4, [r0], #4                \n\t"   \
            "mov    r5, #0                      \n\t"   \
            "ldr    r6, [r1]                    \n\t"   \
            "umlal  r2, r5, r3, r4              \n\t"   \
            "adds   r7, r6, r2                  \n\t"   \
            "adc    r2, r5, #0                  \n\t"   \
            "str    r7, [r1], #4                \n\t"

#define MULADDC_STOP                                    \
            "str    r2, %0                      \n\t"   \
            "str    r1, %1                      \n\t"   \
            "str    r0, %2                      \n\t"   \
         : "=m" (c),  "=m" (d), "=m" (s)        \
         : "m" (s), "m" (d), "m" (c), "m" (b)   \
         : "r0", "r1", "r2", "r3", "r4", "r5",  \
           "r6", "r7", "cc"                     \
         );

#endif /* Thumb */

#endif /* ARMv3 */

#if defined(__alpha__)

#define MULADDC_INIT                    \
    asm(                                \
        "ldq    $1, %3          \n\t"   \
        "ldq    $2, %4          \n\t"   \
        "ldq    $3, %5          \n\t"   \
        "ldq    $4, %6          \n\t"

#define MULADDC_CORE                    \
        "ldq    $6,  0($1)      \n\t"   \
        "addq   $1,  8, $1      \n\t"   \
        "mulq   $6, $4, $7      \n\t"   \
        "umulh  $6, $4, $6      \n\t"   \
        "addq   $7, $3, $7      \n\t"   \
        "cmpult $7, $3, $3      \n\t"   \
        "ldq    $5,  0($2)      \n\t"   \
        "addq   $7, $5, $7      \n\t"   \
        "cmpult $7, $5, $5      \n\t"   \
        "stq    $7,  0($2)      \n\t"   \
        "addq   $2,  8, $2      \n\t"   \
        "addq   $6, $3, $3      \n\t"   \
        "addq   $5, $3, $3      \n\t"

#define MULADDC_STOP                                    \
        "stq    $3, %0          \n\t"   \
        "stq    $2, %1          \n\t"   \
        "stq    $1, %2          \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)              \
        : "m" (s), "m" (d), "m" (c), "m" (b)        \
        : "$1", "$2", "$3", "$4", "$5", "$6", "$7"  \
    );
#endif /* Alpha */

#if defined(__mips__) && !defined(__mips64)

#define MULADDC_INIT                    \
    asm(                                \
        "lw     $10, %3         \n\t"   \
        "lw     $11, %4         \n\t"   \
        "lw     $12, %5         \n\t"   \
        "lw     $13, %6         \n\t"

#define MULADDC_CORE                    \
        "lw     $14, 0($10)     \n\t"   \
        "multu  $13, $14        \n\t"   \
        "addi   $10, $10, 4     \n\t"   \
        "mflo   $14             \n\t"   \
        "mfhi   $9              \n\t"   \
        "addu   $14, $12, $14   \n\t"   \
        "lw     $15, 0($11)     \n\t"   \
        "sltu   $12, $14, $12   \n\t"   \
        "addu   $15, $14, $15   \n\t"   \
        "sltu   $14, $15, $14   \n\t"   \
        "addu   $12, $12, $9    \n\t"   \
        "sw     $15, 0($11)     \n\t"   \
        "addu   $12, $12, $14   \n\t"   \
        "addi   $11, $11, 4     \n\t"

#define MULADDC_STOP                    \
        "sw     $12, %0         \n\t"   \
        "sw     $11, %1         \n\t"   \
        "sw     $10, %2         \n\t"   \
        : "=m" (c), "=m" (d), "=m" (s)                      \
        : "m" (s), "m" (d), "m" (c), "m" (b)                \
        : "$9", "$10", "$11", "$12", "$13", "$14", "$15", "lo", "hi" \
    );

#endif /* MIPS */
#endif /* GNUC */

#if (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)

#define MULADDC_INIT                            \
    __asm   mov     esi, s                      \
    __asm   mov     edi, d                      \
    __asm   mov     ecx, c                      \
    __asm   mov     ebx, b

#define MULADDC_CORE                            \
    __asm   lodsd                               \
    __asm   mul     ebx                         \
    __asm   add     eax, ecx                    \
    __asm   adc     edx, 0                      \
    __asm   add     eax, [edi]                  \
    __asm   adc     edx, 0                      \
    __asm   mov     ecx, edx                    \
    __asm   stosd

#if defined(MBEDTLS_HAVE_SSE2)

#define EMIT __asm _emit

#define MULADDC_HUIT                            \
    EMIT 0x0F  EMIT 0x6E  EMIT 0xC9             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0xC3             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x1F             \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCB             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x16             \
    EMIT 0x0F  EMIT 0xF4  EMIT 0xD0             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x66  EMIT 0x04  \
    EMIT 0x0F  EMIT 0xF4  EMIT 0xE0             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x76  EMIT 0x08  \
    EMIT 0x0F  EMIT 0xF4  EMIT 0xF0             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x7E  EMIT 0x0C  \
    EMIT 0x0F  EMIT 0xF4  EMIT 0xF8             \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCA             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x5F  EMIT 0x04  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xDC             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x6F  EMIT 0x08  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xEE             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x67  EMIT 0x0C  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xFC             \
    EMIT 0x0F  EMIT 0x7E  EMIT 0x0F             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x56  EMIT 0x10  \
    EMIT 0x0F  EMIT 0xF4  EMIT 0xD0             \
    EMIT 0x0F  EMIT 0x73  EMIT 0xD1  EMIT 0x20  \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x66  EMIT 0x14  \
    EMIT 0x0F  EMIT 0xF4  EMIT 0xE0             \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCB             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x76  EMIT 0x18  \
    EMIT 0x0F  EMIT 0xF4  EMIT 0xF0             \
    EMIT 0x0F  EMIT 0x7E  EMIT 0x4F  EMIT 0x04  \
    EMIT 0x0F  EMIT 0x73  EMIT 0xD1  EMIT 0x20  \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x5E  EMIT 0x1C  \
    EMIT 0x0F  EMIT 0xF4  EMIT 0xD8             \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCD             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x6F  EMIT 0x10  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xD5             \
    EMIT 0x0F  EMIT 0x7E  EMIT 0x4F  EMIT 0x08  \
    EMIT 0x0F  EMIT 0x73  EMIT 0xD1  EMIT 0x20  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCF             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x6F  EMIT 0x14  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xE5             \
    EMIT 0x0F  EMIT 0x7E  EMIT 0x4F  EMIT 0x0C  \
    EMIT 0x0F  EMIT 0x73  EMIT 0xD1  EMIT 0x20  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCA             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x6F  EMIT 0x18  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xF5             \
    EMIT 0x0F  EMIT 0x7E  EMIT 0x4F  EMIT 0x10  \
    EMIT 0x0F  EMIT 0x73  EMIT 0xD1  EMIT 0x20  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCC             \
    EMIT 0x0F  EMIT 0x6E  EMIT 0x6F  EMIT 0x1C  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xDD             \
    EMIT 0x0F  EMIT 0x7E  EMIT 0x4F  EMIT 0x14  \
    EMIT 0x0F  EMIT 0x73  EMIT 0xD1  EMIT 0x20  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCE             \
    EMIT 0x0F  EMIT 0x7E  EMIT 0x4F  EMIT 0x18  \
    EMIT 0x0F  EMIT 0x73  EMIT 0xD1  EMIT 0x20  \
    EMIT 0x0F  EMIT 0xD4  EMIT 0xCB             \
    EMIT 0x0F  EMIT 0x7E  EMIT 0x4F  EMIT 0x1C  \
    EMIT 0x83  EMIT 0xC7  EMIT 0x20             \
    EMIT 0x83  EMIT 0xC6  EMIT 0x20             \
    EMIT 0x0F  EMIT 0x73  EMIT 0xD1  EMIT 0x20  \
    EMIT 0x0F  EMIT 0x7E  EMIT 0xC9

#define MULADDC_STOP                            \
    EMIT 0x0F  EMIT 0x77                        \
    __asm   mov     c, ecx                      \
    __asm   mov     d, edi                      \
    __asm   mov     s, esi                      \

#else

#define MULADDC_STOP                            \
    __asm   mov     c, ecx                      \
    __asm   mov     d, edi                      \
    __asm   mov     s, esi                      \

#endif /* SSE2 */
#endif /* MSVC */

#endif /* MBEDTLS_HAVE_ASM */

#if !defined(MULADDC_CORE)
#if defined(MBEDTLS_HAVE_UDBL)

#define MULADDC_INIT                    \
{                                       \
    mbedtls_t_udbl r;                           \
    mbedtls_mpi_uint r0, r1;

#define MULADDC_CORE                    \
    r   = *(s++) * (mbedtls_t_udbl) b;          \
    r0  = (mbedtls_mpi_uint) r;                   \
    r1  = (mbedtls_mpi_uint)( r >> biL );         \
    r0 += c;  r1 += (r0 <  c);          \
    r0 += *d; r1 += (r0 < *d);          \
    c = r1; *(d++) = r0;

#define MULADDC_STOP                    \
}

#else
#define MULADDC_INIT                    \
{                                       \
    mbedtls_mpi_uint s0, s1, b0, b1;              \
    mbedtls_mpi_uint r0, r1, rx, ry;              \
    b0 = ( b << biH ) >> biH;           \
    b1 = ( b >> biH );

#define MULADDC_CORE                    \
    s0 = ( *s << biH ) >> biH;          \
    s1 = ( *s >> biH ); s++;            \
    rx = s0 * b1; r0 = s0 * b0;         \
    ry = s1 * b0; r1 = s1 * b1;         \
    r1 += ( rx >> biH );                \
    r1 += ( ry >> biH );                \
    rx <<= biH; ry <<= biH;             \
    r0 += rx; r1 += (r0 < rx);          \
    r0 += ry; r1 += (r0 < ry);          \
    r0 +=  c; r1 += (r0 <  c);          \
    r0 += *d; r1 += (r0 < *d);          \
    c = r1; *(d++) = r0;

#define MULADDC_STOP                    \
}

#endif /* C (generic)  */
#endif /* C (longlong) */

#endif /* bn_mul.h */


/********* Start of file include/mbedtls/chacha20.h ************/

/**
 * \file chacha20.h
 *
 * \brief   This file contains ChaCha20 definitions and functions.
 *
 *          ChaCha20 is a stream cipher that can encrypt and decrypt
 *          information. ChaCha was created by Daniel Bernstein as a variant of
 *          its Salsa cipher https://cr.yp.to/chacha/chacha-20080128.pdf
 *          ChaCha20 is the variant with 20 rounds, that was also standardized
 *          in RFC 7539.
 *
 * \author Daniel King <damaki.gh@gmail.com>
 */

/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_CHACHA20_H
#define MBEDTLS_CHACHA20_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stdint.h>
#include <stddef.h>

/** Invalid input parameter(s). */
#define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA         -0x0051

/* MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE is deprecated and should not be
 * used. */
/** Feature not available. For example, s part of the API is not implemented. */
#define MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE    -0x0053

/* MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED is deprecated and should not be used.
 */
/** Chacha20 hardware accelerator failed. */
#define MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED        -0x0055

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_CHACHA20_ALT)

typedef struct mbedtls_chacha20_context
{
    uint32_t state[16];          /*! The state (before round operations). */
    uint8_t  keystream8[64];     /*! Leftover keystream bytes. */
    size_t keystream_bytes_used; /*! Number of keystream bytes already used. */
}
mbedtls_chacha20_context;

#else  /* MBEDTLS_CHACHA20_ALT */

#endif /* MBEDTLS_CHACHA20_ALT */

/**
 * \brief           This function initializes the specified ChaCha20 context.
 *
 *                  It must be the first API called before using
 *                  the context.
 *
 *                  It is usually followed by calls to
 *                  \c mbedtls_chacha20_setkey() and
 *                  \c mbedtls_chacha20_starts(), then one or more calls to
 *                  to \c mbedtls_chacha20_update(), and finally to
 *                  \c mbedtls_chacha20_free().
 *
 * \param ctx       The ChaCha20 context to initialize.
 *                  This must not be \c NULL.
 */
void mbedtls_chacha20_init( mbedtls_chacha20_context *ctx );

/**
 * \brief           This function releases and clears the specified
 *                  ChaCha20 context.
 *
 * \param ctx       The ChaCha20 context to clear. This may be \c NULL,
 *                  in which case this function is a no-op. If it is not
 *                  \c NULL, it must point to an initialized context.
 *
 */
void mbedtls_chacha20_free( mbedtls_chacha20_context *ctx );

/**
 * \brief           This function sets the encryption/decryption key.
 *
 * \note            After using this function, you must also call
 *                  \c mbedtls_chacha20_starts() to set a nonce before you
 *                  start encrypting/decrypting data with
 *                  \c mbedtls_chacha_update().
 *
 * \param ctx       The ChaCha20 context to which the key should be bound.
 *                  It must be initialized.
 * \param key       The encryption/decryption key. This must be \c 32 Bytes
 *                  in length.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA if ctx or key is NULL.
 */
int mbedtls_chacha20_setkey( mbedtls_chacha20_context *ctx,
                             const unsigned char key[32] );

/**
 * \brief           This function sets the nonce and initial counter value.
 *
 * \note            A ChaCha20 context can be re-used with the same key by
 *                  calling this function to change the nonce.
 *
 * \warning         You must never use the same nonce twice with the same key.
 *                  This would void any confidentiality guarantees for the
 *                  messages encrypted with the same nonce and key.
 *
 * \param ctx       The ChaCha20 context to which the nonce should be bound.
 *                  It must be initialized and bound to a key.
 * \param nonce     The nonce. This must be \c 12 Bytes in size.
 * \param counter   The initial counter value. This is usually \c 0.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA if ctx or nonce is
 *                  NULL.
 */
int mbedtls_chacha20_starts( mbedtls_chacha20_context* ctx,
                             const unsigned char nonce[12],
                             uint32_t counter );

/**
 * \brief           This function encrypts or decrypts data.
 *
 *                  Since ChaCha20 is a stream cipher, the same operation is
 *                  used for encrypting and decrypting data.
 *
 * \note            The \p input and \p output pointers must either be equal or
 *                  point to non-overlapping buffers.
 *
 * \note            \c mbedtls_chacha20_setkey() and
 *                  \c mbedtls_chacha20_starts() must be called at least once
 *                  to setup the context before this function can be called.
 *
 * \note            This function can be called multiple times in a row in
 *                  order to encrypt of decrypt data piecewise with the same
 *                  key and nonce.
 *
 * \param ctx       The ChaCha20 context to use for encryption or decryption.
 *                  It must be initialized and bound to a key and nonce.
 * \param size      The length of the input data in Bytes.
 * \param input     The buffer holding the input data.
 *                  This pointer can be \c NULL if `size == 0`.
 * \param output    The buffer holding the output data.
 *                  This must be able to hold \p size Bytes.
 *                  This pointer can be \c NULL if `size == 0`.
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_chacha20_update( mbedtls_chacha20_context *ctx,
                             size_t size,
                             const unsigned char *input,
                             unsigned char *output );

/**
 * \brief           This function encrypts or decrypts data with ChaCha20 and
 *                  the given key and nonce.
 *
 *                  Since ChaCha20 is a stream cipher, the same operation is
 *                  used for encrypting and decrypting data.
 *
 * \warning         You must never use the same (key, nonce) pair more than
 *                  once. This would void any confidentiality guarantees for
 *                  the messages encrypted with the same nonce and key.
 *
 * \note            The \p input and \p output pointers must either be equal or
 *                  point to non-overlapping buffers.
 *
 * \param key       The encryption/decryption key.
 *                  This must be \c 32 Bytes in length.
 * \param nonce     The nonce. This must be \c 12 Bytes in size.
 * \param counter   The initial counter value. This is usually \c 0.
 * \param size      The length of the input data in Bytes.
 * \param input     The buffer holding the input data.
 *                  This pointer can be \c NULL if `size == 0`.
 * \param output    The buffer holding the output data.
 *                  This must be able to hold \p size Bytes.
 *                  This pointer can be \c NULL if `size == 0`.
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_chacha20_crypt( const unsigned char key[32],
                            const unsigned char nonce[12],
                            uint32_t counter,
                            size_t size,
                            const unsigned char* input,
                            unsigned char* output );

#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief           The ChaCha20 checkup routine.
 *
 * \return          \c 0 on success.
 * \return          \c 1 on failure.
 */
int mbedtls_chacha20_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_CHACHA20_H */


/********* Start of file include/mbedtls/poly1305.h ************/

/**
 * \file poly1305.h
 *
 * \brief   This file contains Poly1305 definitions and functions.
 *
 *          Poly1305 is a one-time message authenticator that can be used to
 *          authenticate messages. Poly1305-AES was created by Daniel
 *          Bernstein https://cr.yp.to/mac/poly1305-20050329.pdf The generic
 *          Poly1305 algorithm (not tied to AES) was also standardized in RFC
 *          7539.
 *
 * \author Daniel King <damaki.gh@gmail.com>
 */

/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_POLY1305_H
#define MBEDTLS_POLY1305_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stdint.h>
#include <stddef.h>

/** Invalid input parameter(s). */
#define MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA         -0x0057

/* MBEDTLS_ERR_POLY1305_FEATURE_UNAVAILABLE is deprecated and should not be
 * used. */
/** Feature not available. For example, s part of the API is not implemented. */
#define MBEDTLS_ERR_POLY1305_FEATURE_UNAVAILABLE    -0x0059

/* MBEDTLS_ERR_POLY1305_HW_ACCEL_FAILED is deprecated and should not be used.
 */
/** Poly1305 hardware accelerator failed. */
#define MBEDTLS_ERR_POLY1305_HW_ACCEL_FAILED        -0x005B

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_POLY1305_ALT)

typedef struct mbedtls_poly1305_context
{
    uint32_t r[4];      /** The value for 'r' (low 128 bits of the key). */
    uint32_t s[4];      /** The value for 's' (high 128 bits of the key). */
    uint32_t acc[5];    /** The accumulator number. */
    uint8_t queue[16];  /** The current partial block of data. */
    size_t queue_len;   /** The number of bytes stored in 'queue'. */
}
mbedtls_poly1305_context;

#else  /* MBEDTLS_POLY1305_ALT */

#endif /* MBEDTLS_POLY1305_ALT */

/**
 * \brief           This function initializes the specified Poly1305 context.
 *
 *                  It must be the first API called before using
 *                  the context.
 *
 *                  It is usually followed by a call to
 *                  \c mbedtls_poly1305_starts(), then one or more calls to
 *                  \c mbedtls_poly1305_update(), then one call to
 *                  \c mbedtls_poly1305_finish(), then finally
 *                  \c mbedtls_poly1305_free().
 *
 * \param ctx       The Poly1305 context to initialize. This must
 *                  not be \c NULL.
 */
void mbedtls_poly1305_init( mbedtls_poly1305_context *ctx );

/**
 * \brief           This function releases and clears the specified
 *                  Poly1305 context.
 *
 * \param ctx       The Poly1305 context to clear. This may be \c NULL, in which
 *                  case this function is a no-op. If it is not \c NULL, it must
 *                  point to an initialized Poly1305 context.
 */
void mbedtls_poly1305_free( mbedtls_poly1305_context *ctx );

/**
 * \brief           This function sets the one-time authentication key.
 *
 * \warning         The key must be unique and unpredictable for each
 *                  invocation of Poly1305.
 *
 * \param ctx       The Poly1305 context to which the key should be bound.
 *                  This must be initialized.
 * \param key       The buffer containing the \c 32 Byte (\c 256 Bit) key.
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_poly1305_starts( mbedtls_poly1305_context *ctx,
                             const unsigned char key[32] );

/**
 * \brief           This functions feeds an input buffer into an ongoing
 *                  Poly1305 computation.
 *
 *                  It is called between \c mbedtls_cipher_poly1305_starts() and
 *                  \c mbedtls_cipher_poly1305_finish().
 *                  It can be called repeatedly to process a stream of data.
 *
 * \param ctx       The Poly1305 context to use for the Poly1305 operation.
 *                  This must be initialized and bound to a key.
 * \param ilen      The length of the input data in Bytes.
 *                  Any value is accepted.
 * \param input     The buffer holding the input data.
 *                  This pointer can be \c NULL if `ilen == 0`.
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_poly1305_update( mbedtls_poly1305_context *ctx,
                             const unsigned char *input,
                             size_t ilen );

/**
 * \brief           This function generates the Poly1305 Message
 *                  Authentication Code (MAC).
 *
 * \param ctx       The Poly1305 context to use for the Poly1305 operation.
 *                  This must be initialized and bound to a key.
 * \param mac       The buffer to where the MAC is written. This must
 *                  be a writable buffer of length \c 16 Bytes.
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_poly1305_finish( mbedtls_poly1305_context *ctx,
                             unsigned char mac[16] );

/**
 * \brief           This function calculates the Poly1305 MAC of the input
 *                  buffer with the provided key.
 *
 * \warning         The key must be unique and unpredictable for each
 *                  invocation of Poly1305.
 *
 * \param key       The buffer containing the \c 32 Byte (\c 256 Bit) key.
 * \param ilen      The length of the input data in Bytes.
 *                  Any value is accepted.
 * \param input     The buffer holding the input data.
 *                  This pointer can be \c NULL if `ilen == 0`.
 * \param mac       The buffer to where the MAC is written. This must be
 *                  a writable buffer of length \c 16 Bytes.
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_poly1305_mac( const unsigned char key[32],
                          const unsigned char *input,
                          size_t ilen,
                          unsigned char mac[16] );

#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief           The Poly1305 checkup routine.
 *
 * \return          \c 0 on success.
 * \return          \c 1 on failure.
 */
int mbedtls_poly1305_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_POLY1305_H */


/********* Start of file include/mbedtls/chachapoly.h ************/

/**
 * \file chachapoly.h
 *
 * \brief   This file contains the AEAD-ChaCha20-Poly1305 definitions and
 *          functions.
 *
 *          ChaCha20-Poly1305 is an algorithm for Authenticated Encryption
 *          with Associated Data (AEAD) that can be used to encrypt and
 *          authenticate data. It is based on ChaCha20 and Poly1305 by Daniel
 *          Bernstein and was standardized in RFC 7539.
 *
 * \author Daniel King <damaki.gh@gmail.com>
 */

/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_CHACHAPOLY_H
#define MBEDTLS_CHACHAPOLY_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

/* for shared error codes */


/** The requested operation is not permitted in the current state. */
#define MBEDTLS_ERR_CHACHAPOLY_BAD_STATE            -0x0054
/** Authenticated decryption failed: data was not authentic. */
#define MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED          -0x0056

#ifdef __cplusplus
extern "C" {
#endif

typedef enum
{
    MBEDTLS_CHACHAPOLY_ENCRYPT,     /**< The mode value for performing encryption. */
    MBEDTLS_CHACHAPOLY_DECRYPT      /**< The mode value for performing decryption. */
}
mbedtls_chachapoly_mode_t;

#if !defined(MBEDTLS_CHACHAPOLY_ALT)



typedef struct mbedtls_chachapoly_context
{
    mbedtls_chacha20_context chacha20_ctx;  /**< The ChaCha20 context. */
    mbedtls_poly1305_context poly1305_ctx;  /**< The Poly1305 context. */
    uint64_t aad_len;                       /**< The length (bytes) of the Additional Authenticated Data. */
    uint64_t ciphertext_len;                /**< The length (bytes) of the ciphertext. */
    int state;                              /**< The current state of the context. */
    mbedtls_chachapoly_mode_t mode;         /**< Cipher mode (encrypt or decrypt). */
}
mbedtls_chachapoly_context;

#else /* !MBEDTLS_CHACHAPOLY_ALT */

#endif /* !MBEDTLS_CHACHAPOLY_ALT */

/**
 * \brief           This function initializes the specified ChaCha20-Poly1305 context.
 *
 *                  It must be the first API called before using
 *                  the context. It must be followed by a call to
 *                  \c mbedtls_chachapoly_setkey() before any operation can be
 *                  done, and to \c mbedtls_chachapoly_free() once all
 *                  operations with that context have been finished.
 *
 *                  In order to encrypt or decrypt full messages at once, for
 *                  each message you should make a single call to
 *                  \c mbedtls_chachapoly_crypt_and_tag() or
 *                  \c mbedtls_chachapoly_auth_decrypt().
 *
 *                  In order to encrypt messages piecewise, for each
 *                  message you should make a call to
 *                  \c mbedtls_chachapoly_starts(), then 0 or more calls to
 *                  \c mbedtls_chachapoly_update_aad(), then 0 or more calls to
 *                  \c mbedtls_chachapoly_update(), then one call to
 *                  \c mbedtls_chachapoly_finish().
 *
 * \warning         Decryption with the piecewise API is discouraged! Always
 *                  use \c mbedtls_chachapoly_auth_decrypt() when possible!
 *
 *                  If however this is not possible because the data is too
 *                  large to fit in memory, you need to:
 *
 *                  - call \c mbedtls_chachapoly_starts() and (if needed)
 *                  \c mbedtls_chachapoly_update_aad() as above,
 *                  - call \c mbedtls_chachapoly_update() multiple times and
 *                  ensure its output (the plaintext) is NOT used in any other
 *                  way than placing it in temporary storage at this point,
 *                  - call \c mbedtls_chachapoly_finish() to compute the
 *                  authentication tag and compared it in constant time to the
 *                  tag received with the ciphertext.
 *
 *                  If the tags are not equal, you must immediately discard
 *                  all previous outputs of \c mbedtls_chachapoly_update(),
 *                  otherwise you can now safely use the plaintext.
 *
 * \param ctx       The ChachaPoly context to initialize. Must not be \c NULL.
 */
void mbedtls_chachapoly_init( mbedtls_chachapoly_context *ctx );

/**
 * \brief           This function releases and clears the specified
 *                  ChaCha20-Poly1305 context.
 *
 * \param ctx       The ChachaPoly context to clear. This may be \c NULL, in which
 *                  case this function is a no-op.
 */
void mbedtls_chachapoly_free( mbedtls_chachapoly_context *ctx );

/**
 * \brief           This function sets the ChaCha20-Poly1305
 *                  symmetric encryption key.
 *
 * \param ctx       The ChaCha20-Poly1305 context to which the key should be
 *                  bound. This must be initialized.
 * \param key       The \c 256 Bit (\c 32 Bytes) key.
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_chachapoly_setkey( mbedtls_chachapoly_context *ctx,
                               const unsigned char key[32] );

/**
 * \brief           This function starts a ChaCha20-Poly1305 encryption or
 *                  decryption operation.
 *
 * \warning         You must never use the same nonce twice with the same key.
 *                  This would void any confidentiality and authenticity
 *                  guarantees for the messages encrypted with the same nonce
 *                  and key.
 *
 * \note            If the context is being used for AAD only (no data to
 *                  encrypt or decrypt) then \p mode can be set to any value.
 *
 * \warning         Decryption with the piecewise API is discouraged, see the
 *                  warning on \c mbedtls_chachapoly_init().
 *
 * \param ctx       The ChaCha20-Poly1305 context. This must be initialized
 *                  and bound to a key.
 * \param nonce     The nonce/IV to use for the message.
 *                  This must be a redable buffer of length \c 12 Bytes.
 * \param mode      The operation to perform: #MBEDTLS_CHACHAPOLY_ENCRYPT or
 *                  #MBEDTLS_CHACHAPOLY_DECRYPT (discouraged, see warning).
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_chachapoly_starts( mbedtls_chachapoly_context *ctx,
                               const unsigned char nonce[12],
                               mbedtls_chachapoly_mode_t mode );

/**
 * \brief           This function feeds additional data to be authenticated
 *                  into an ongoing ChaCha20-Poly1305 operation.
 *
 *                  The Additional Authenticated Data (AAD), also called
 *                  Associated Data (AD) is only authenticated but not
 *                  encrypted nor included in the encrypted output. It is
 *                  usually transmitted separately from the ciphertext or
 *                  computed locally by each party.
 *
 * \note            This function is called before data is encrypted/decrypted.
 *                  I.e. call this function to process the AAD before calling
 *                  \c mbedtls_chachapoly_update().
 *
 *                  You may call this function multiple times to process
 *                  an arbitrary amount of AAD. It is permitted to call
 *                  this function 0 times, if no AAD is used.
 *
 *                  This function cannot be called any more if data has
 *                  been processed by \c mbedtls_chachapoly_update(),
 *                  or if the context has been finished.
 *
 * \warning         Decryption with the piecewise API is discouraged, see the
 *                  warning on \c mbedtls_chachapoly_init().
 *
 * \param ctx       The ChaCha20-Poly1305 context. This must be initialized
 *                  and bound to a key.
 * \param aad_len   The length in Bytes of the AAD. The length has no
 *                  restrictions.
 * \param aad       Buffer containing the AAD.
 *                  This pointer can be \c NULL if `aad_len == 0`.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA
 *                  if \p ctx or \p aad are NULL.
 * \return          #MBEDTLS_ERR_CHACHAPOLY_BAD_STATE
 *                  if the operations has not been started or has been
 *                  finished, or if the AAD has been finished.
 */
int mbedtls_chachapoly_update_aad( mbedtls_chachapoly_context *ctx,
                                   const unsigned char *aad,
                                   size_t aad_len );

/**
 * \brief           Thus function feeds data to be encrypted or decrypted
 *                  into an on-going ChaCha20-Poly1305
 *                  operation.
 *
 *                  The direction (encryption or decryption) depends on the
 *                  mode that was given when calling
 *                  \c mbedtls_chachapoly_starts().
 *
 *                  You may call this function multiple times to process
 *                  an arbitrary amount of data. It is permitted to call
 *                  this function 0 times, if no data is to be encrypted
 *                  or decrypted.
 *
 * \warning         Decryption with the piecewise API is discouraged, see the
 *                  warning on \c mbedtls_chachapoly_init().
 *
 * \param ctx       The ChaCha20-Poly1305 context to use. This must be initialized.
 * \param len       The length (in bytes) of the data to encrypt or decrypt.
 * \param input     The buffer containing the data to encrypt or decrypt.
 *                  This pointer can be \c NULL if `len == 0`.
 * \param output    The buffer to where the encrypted or decrypted data is
 *                  written. This must be able to hold \p len bytes.
 *                  This pointer can be \c NULL if `len == 0`.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_CHACHAPOLY_BAD_STATE
 *                  if the operation has not been started or has been
 *                  finished.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_chachapoly_update( mbedtls_chachapoly_context *ctx,
                               size_t len,
                               const unsigned char *input,
                               unsigned char *output );

/**
 * \brief           This function finished the ChaCha20-Poly1305 operation and
 *                  generates the MAC (authentication tag).
 *
 * \param ctx       The ChaCha20-Poly1305 context to use. This must be initialized.
 * \param mac       The buffer to where the 128-bit (16 bytes) MAC is written.
 *
 * \warning         Decryption with the piecewise API is discouraged, see the
 *                  warning on \c mbedtls_chachapoly_init().
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_CHACHAPOLY_BAD_STATE
 *                  if the operation has not been started or has been
 *                  finished.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_chachapoly_finish( mbedtls_chachapoly_context *ctx,
                               unsigned char mac[16] );

/**
 * \brief           This function performs a complete ChaCha20-Poly1305
 *                  authenticated encryption with the previously-set key.
 *
 * \note            Before using this function, you must set the key with
 *                  \c mbedtls_chachapoly_setkey().
 *
 * \warning         You must never use the same nonce twice with the same key.
 *                  This would void any confidentiality and authenticity
 *                  guarantees for the messages encrypted with the same nonce
 *                  and key.
 *
 * \param ctx       The ChaCha20-Poly1305 context to use (holds the key).
 *                  This must be initialized.
 * \param length    The length (in bytes) of the data to encrypt or decrypt.
 * \param nonce     The 96-bit (12 bytes) nonce/IV to use.
 * \param aad       The buffer containing the additional authenticated
 *                  data (AAD). This pointer can be \c NULL if `aad_len == 0`.
 * \param aad_len   The length (in bytes) of the AAD data to process.
 * \param input     The buffer containing the data to encrypt or decrypt.
 *                  This pointer can be \c NULL if `ilen == 0`.
 * \param output    The buffer to where the encrypted or decrypted data
 *                  is written. This pointer can be \c NULL if `ilen == 0`.
 * \param tag       The buffer to where the computed 128-bit (16 bytes) MAC
 *                  is written. This must not be \c NULL.
 *
 * \return          \c 0 on success.
 * \return          A negative error code on failure.
 */
int mbedtls_chachapoly_encrypt_and_tag( mbedtls_chachapoly_context *ctx,
                                        size_t length,
                                        const unsigned char nonce[12],
                                        const unsigned char *aad,
                                        size_t aad_len,
                                        const unsigned char *input,
                                        unsigned char *output,
                                        unsigned char tag[16] );

/**
 * \brief           This function performs a complete ChaCha20-Poly1305
 *                  authenticated decryption with the previously-set key.
 *
 * \note            Before using this function, you must set the key with
 *                  \c mbedtls_chachapoly_setkey().
 *
 * \param ctx       The ChaCha20-Poly1305 context to use (holds the key).
 * \param length    The length (in Bytes) of the data to decrypt.
 * \param nonce     The \c 96 Bit (\c 12 bytes) nonce/IV to use.
 * \param aad       The buffer containing the additional authenticated data (AAD).
 *                  This pointer can be \c NULL if `aad_len == 0`.
 * \param aad_len   The length (in bytes) of the AAD data to process.
 * \param tag       The buffer holding the authentication tag.
 *                  This must be a readable buffer of length \c 16 Bytes.
 * \param input     The buffer containing the data to decrypt.
 *                  This pointer can be \c NULL if `ilen == 0`.
 * \param output    The buffer to where the decrypted data is written.
 *                  This pointer can be \c NULL if `ilen == 0`.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED
 *                  if the data was not authentic.
 * \return          Another negative error code on other kinds of failure.
 */
int mbedtls_chachapoly_auth_decrypt( mbedtls_chachapoly_context *ctx,
                                     size_t length,
                                     const unsigned char nonce[12],
                                     const unsigned char *aad,
                                     size_t aad_len,
                                     const unsigned char tag[16],
                                     const unsigned char *input,
                                     unsigned char *output );

#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief           The ChaCha20-Poly1305 checkup routine.
 *
 * \return          \c 0 on success.
 * \return          \c 1 on failure.
 */
int mbedtls_chachapoly_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_CHACHAPOLY_H */


/********* Start of file include/mbedtls/camellia.h ************/

/**
 * \file camellia.h
 *
 * \brief Camellia block cipher
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_CAMELLIA_H
#define MBEDTLS_CAMELLIA_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>



#define MBEDTLS_CAMELLIA_ENCRYPT     1
#define MBEDTLS_CAMELLIA_DECRYPT     0

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#define MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH   MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( -0x0024 )
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
/** Bad input data. */
#define MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA -0x0024

/** Invalid data input length. */
#define MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH -0x0026

/* MBEDTLS_ERR_CAMELLIA_HW_ACCEL_FAILED is deprecated and should not be used.
 */
/** Camellia hardware accelerator failed. */
#define MBEDTLS_ERR_CAMELLIA_HW_ACCEL_FAILED              -0x0027

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_CAMELLIA_ALT)
// Regular implementation
//

/**
 * \brief          CAMELLIA context structure
 */
typedef struct mbedtls_camellia_context
{
    int nr;                     /*!<  number of rounds  */
    uint32_t rk[68];            /*!<  CAMELLIA round keys    */
}
mbedtls_camellia_context;

#else  /* MBEDTLS_CAMELLIA_ALT */

#endif /* MBEDTLS_CAMELLIA_ALT */

/**
 * \brief          Initialize a CAMELLIA context.
 *
 * \param ctx      The CAMELLIA context to be initialized.
 *                 This must not be \c NULL.
 */
void mbedtls_camellia_init( mbedtls_camellia_context *ctx );

/**
 * \brief          Clear a CAMELLIA context.
 *
 * \param ctx      The CAMELLIA context to be cleared. This may be \c NULL,
 *                 in which case this function returns immediately. If it is not
 *                 \c NULL, it must be initialized.
 */
void mbedtls_camellia_free( mbedtls_camellia_context *ctx );

/**
 * \brief          Perform a CAMELLIA key schedule operation for encryption.
 *
 * \param ctx      The CAMELLIA context to use. This must be initialized.
 * \param key      The encryption key to use. This must be a readable buffer
 *                 of size \p keybits Bits.
 * \param keybits  The length of \p key in Bits. This must be either \c 128,
 *                 \c 192 or \c 256.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_camellia_setkey_enc( mbedtls_camellia_context *ctx,
                                 const unsigned char *key,
                                 unsigned int keybits );

/**
 * \brief          Perform a CAMELLIA key schedule operation for decryption.
 *
 * \param ctx      The CAMELLIA context to use. This must be initialized.
 * \param key      The decryption key. This must be a readable buffer
 *                 of size \p keybits Bits.
 * \param keybits  The length of \p key in Bits. This must be either \c 128,
 *                 \c 192 or \c 256.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_camellia_setkey_dec( mbedtls_camellia_context *ctx,
                                 const unsigned char *key,
                                 unsigned int keybits );

/**
 * \brief          Perform a CAMELLIA-ECB block encryption/decryption operation.
 *
 * \param ctx      The CAMELLIA context to use. This must be initialized
 *                 and bound to a key.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_CAMELLIA_ENCRYPT or #MBEDTLS_CAMELLIA_DECRYPT.
 * \param input    The input block. This must be a readable buffer
 *                 of size \c 16 Bytes.
 * \param output   The output block. This must be a writable buffer
 *                 of size \c 16 Bytes.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_camellia_crypt_ecb( mbedtls_camellia_context *ctx,
                    int mode,
                    const unsigned char input[16],
                    unsigned char output[16] );

#if defined(MBEDTLS_CIPHER_MODE_CBC)
/**
 * \brief          Perform a CAMELLIA-CBC buffer encryption/decryption operation.
 *
 * \note           Upon exit, the content of the IV is updated so that you can
 *                 call the function same function again on the following
 *                 block(s) of data and get the same result as if it was
 *                 encrypted in one call. This allows a "streaming" usage.
 *                 If on the other hand you need to retain the contents of the
 *                 IV, you should either save it manually or use the cipher
 *                 module instead.
 *
 * \param ctx      The CAMELLIA context to use. This must be initialized
 *                 and bound to a key.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_CAMELLIA_ENCRYPT or #MBEDTLS_CAMELLIA_DECRYPT.
 * \param length   The length in Bytes of the input data \p input.
 *                 This must be a multiple of \c 16 Bytes.
 * \param iv       The initialization vector. This must be a read/write buffer
 *                 of length \c 16 Bytes. It is updated to allow streaming
 *                 use as explained above.
 * \param input    The buffer holding the input data. This must point to a
 *                 readable buffer of length \p length Bytes.
 * \param output   The buffer holding the output data. This must point to a
 *                 writable buffer of length \p length Bytes.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_camellia_crypt_cbc( mbedtls_camellia_context *ctx,
                    int mode,
                    size_t length,
                    unsigned char iv[16],
                    const unsigned char *input,
                    unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CBC */

#if defined(MBEDTLS_CIPHER_MODE_CFB)
/**
 * \brief          Perform a CAMELLIA-CFB128 buffer encryption/decryption
 *                 operation.
 *
 * \note           Due to the nature of CFB mode, you should use the same
 *                 key for both encryption and decryption. In particular, calls
 *                 to this function should be preceded by a key-schedule via
 *                 mbedtls_camellia_setkey_enc() regardless of whether \p mode
 *                 is #MBEDTLS_CAMELLIA_ENCRYPT or #MBEDTLS_CAMELLIA_DECRYPT.
 *
 * \note           Upon exit, the content of the IV is updated so that you can
 *                 call the function same function again on the following
 *                 block(s) of data and get the same result as if it was
 *                 encrypted in one call. This allows a "streaming" usage.
 *                 If on the other hand you need to retain the contents of the
 *                 IV, you should either save it manually or use the cipher
 *                 module instead.
 *
 * \param ctx      The CAMELLIA context to use. This must be initialized
 *                 and bound to a key.
 * \param mode     The mode of operation. This must be either
 *                 #MBEDTLS_CAMELLIA_ENCRYPT or #MBEDTLS_CAMELLIA_DECRYPT.
 * \param length   The length of the input data \p input. Any value is allowed.
 * \param iv_off   The current offset in the IV. This must be smaller
 *                 than \c 16 Bytes. It is updated after this call to allow
 *                 the aforementioned streaming usage.
 * \param iv       The initialization vector. This must be a read/write buffer
 *                 of length \c 16 Bytes. It is updated after this call to
 *                 allow the aforementioned streaming usage.
 * \param input    The buffer holding the input data. This must be a readable
 *                 buffer of size \p length Bytes.
 * \param output   The buffer to hold the output data. This must be a writable
 *                 buffer of length \p length Bytes.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_camellia_crypt_cfb128( mbedtls_camellia_context *ctx,
                       int mode,
                       size_t length,
                       size_t *iv_off,
                       unsigned char iv[16],
                       const unsigned char *input,
                       unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CFB */

#if defined(MBEDTLS_CIPHER_MODE_CTR)
/**
 * \brief      Perform a CAMELLIA-CTR buffer encryption/decryption operation.
 *
 * *note       Due to the nature of CTR mode, you should use the same
 *             key for both encryption and decryption. In particular, calls
 *             to this function should be preceded by a key-schedule via
 *             mbedtls_camellia_setkey_enc() regardless of whether \p mode
 *             is #MBEDTLS_CAMELLIA_ENCRYPT or #MBEDTLS_CAMELLIA_DECRYPT.
 *
 * \warning    You must never reuse a nonce value with the same key. Doing so
 *             would void the encryption for the two messages encrypted with
 *             the same nonce and key.
 *
 *             There are two common strategies for managing nonces with CTR:
 *
 *             1. You can handle everything as a single message processed over
 *             successive calls to this function. In that case, you want to
 *             set \p nonce_counter and \p nc_off to 0 for the first call, and
 *             then preserve the values of \p nonce_counter, \p nc_off and \p
 *             stream_block across calls to this function as they will be
 *             updated by this function.
 *
 *             With this strategy, you must not encrypt more than 2**128
 *             blocks of data with the same key.
 *
 *             2. You can encrypt separate messages by dividing the \p
 *             nonce_counter buffer in two areas: the first one used for a
 *             per-message nonce, handled by yourself, and the second one
 *             updated by this function internally.
 *
 *             For example, you might reserve the first \c 12 Bytes for the
 *             per-message nonce, and the last \c 4 Bytes for internal use.
 *             In that case, before calling this function on a new message you
 *             need to set the first \c 12 Bytes of \p nonce_counter to your
 *             chosen nonce value, the last four to \c 0, and \p nc_off to \c 0
 *             (which will cause \p stream_block to be ignored). That way, you
 *             can encrypt at most \c 2**96 messages of up to \c 2**32 blocks
 *             each  with the same key.
 *
 *             The per-message nonce (or information sufficient to reconstruct
 *             it) needs to be communicated with the ciphertext and must be
 *             unique. The recommended way to ensure uniqueness is to use a
 *             message counter. An alternative is to generate random nonces,
 *             but this limits the number of messages that can be securely
 *             encrypted: for example, with 96-bit random nonces, you should
 *             not encrypt more than 2**32 messages with the same key.
 *
 *             Note that for both stategies, sizes are measured in blocks and
 *             that a CAMELLIA block is \c 16 Bytes.
 *
 * \warning    Upon return, \p stream_block contains sensitive data. Its
 *             content must not be written to insecure storage and should be
 *             securely discarded as soon as it's no longer needed.
 *
 * \param ctx           The CAMELLIA context to use. This must be initialized
 *                      and bound to a key.
 * \param length        The length of the input data \p input in Bytes.
 *                      Any value is allowed.
 * \param nc_off        The offset in the current \p stream_block (for resuming
 *                      within current cipher stream). The offset pointer to
 *                      should be \c 0 at the start of a stream. It is updated
 *                      at the end of this call.
 * \param nonce_counter The 128-bit nonce and counter. This must be a read/write
 *                      buffer of length \c 16 Bytes.
 * \param stream_block  The saved stream-block for resuming. This must be a
 *                      read/write buffer of length \c 16 Bytes.
 * \param input         The input data stream. This must be a readable buffer of
 *                      size \p length Bytes.
 * \param output        The output data stream. This must be a writable buffer
 *                      of size \p length Bytes.
 *
 * \return              \c 0 if successful.
 * \return              A negative error code on failure.
 */
int mbedtls_camellia_crypt_ctr( mbedtls_camellia_context *ctx,
                       size_t length,
                       size_t *nc_off,
                       unsigned char nonce_counter[16],
                       unsigned char stream_block[16],
                       const unsigned char *input,
                       unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CTR */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int mbedtls_camellia_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* camellia.h */


/********* Start of file include/mbedtls/ctr_drbg.h ************/

/**
 * \file ctr_drbg.h
 *
 * \brief    This file contains definitions and functions for the
 *           CTR_DRBG pseudorandom generator.
 *
 * CTR_DRBG is a standardized way of building a PRNG from a block-cipher
 * in counter mode operation, as defined in <em>NIST SP 800-90A:
 * Recommendation for Random Number Generation Using Deterministic Random
 * Bit Generators</em>.
 *
 * The Mbed TLS implementation of CTR_DRBG uses AES-256 (default) or AES-128
 * (if \c MBEDTLS_CTR_DRBG_USE_128_BIT_KEY is enabled at compile time)
 * as the underlying block cipher, with a derivation function.
 *
 * The security strength as defined in NIST SP 800-90A is
 * 128 bits when AES-128 is used (\c MBEDTLS_CTR_DRBG_USE_128_BIT_KEY enabled)
 * and 256 bits otherwise, provided that #MBEDTLS_CTR_DRBG_ENTROPY_LEN is
 * kept at its default value (and not overridden in config.h) and that the
 * DRBG instance is set up with default parameters.
 * See the documentation of mbedtls_ctr_drbg_seed() for more
 * information.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_CTR_DRBG_H
#define MBEDTLS_CTR_DRBG_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#if defined(MBEDTLS_THREADING_C)

#endif

/** The entropy source failed. */
#define MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED        -0x0034
/** The requested random buffer length is too big. */
#define MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG              -0x0036
/** The input (entropy + additional data) is too large. */
#define MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG                -0x0038
/** Read or write error in file. */
#define MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR                -0x003A

#define MBEDTLS_CTR_DRBG_BLOCKSIZE          16 /**< The block size used by the cipher. */

#if defined(MBEDTLS_CTR_DRBG_USE_128_BIT_KEY)
#define MBEDTLS_CTR_DRBG_KEYSIZE            16
/**< The key size in bytes used by the cipher.
 *
 * Compile-time choice: 16 bytes (128 bits)
 * because #MBEDTLS_CTR_DRBG_USE_128_BIT_KEY is enabled.
 */
#else
#define MBEDTLS_CTR_DRBG_KEYSIZE            32
/**< The key size in bytes used by the cipher.
 *
 * Compile-time choice: 32 bytes (256 bits)
 * because \c MBEDTLS_CTR_DRBG_USE_128_BIT_KEY is disabled.
 */
#endif

#define MBEDTLS_CTR_DRBG_KEYBITS            ( MBEDTLS_CTR_DRBG_KEYSIZE * 8 ) /**< The key size for the DRBG operation, in bits. */
#define MBEDTLS_CTR_DRBG_SEEDLEN            ( MBEDTLS_CTR_DRBG_KEYSIZE + MBEDTLS_CTR_DRBG_BLOCKSIZE ) /**< The seed length, calculated as (counter + AES key). */

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them using the compiler command
 * line.
 * \{
 */

/** \def MBEDTLS_CTR_DRBG_ENTROPY_LEN
 *
 * \brief The amount of entropy used per seed by default, in bytes.
 */
#if !defined(MBEDTLS_CTR_DRBG_ENTROPY_LEN)
#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_ENTROPY_FORCE_SHA256)
/** This is 48 bytes because the entropy module uses SHA-512
 * (\c MBEDTLS_ENTROPY_FORCE_SHA256 is disabled).
 */
#define MBEDTLS_CTR_DRBG_ENTROPY_LEN        48

#else /* defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_ENTROPY_FORCE_SHA256) */

/** This is 32 bytes because the entropy module uses SHA-256
 * (the SHA512 module is disabled or
 * \c MBEDTLS_ENTROPY_FORCE_SHA256 is enabled).
 */
#if !defined(MBEDTLS_CTR_DRBG_USE_128_BIT_KEY)
/** \warning To achieve a 256-bit security strength, you must pass a nonce
 *           to mbedtls_ctr_drbg_seed().
 */
#endif /* !defined(MBEDTLS_CTR_DRBG_USE_128_BIT_KEY) */
#define MBEDTLS_CTR_DRBG_ENTROPY_LEN        32
#endif /* defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_ENTROPY_FORCE_SHA256) */
#endif /* !defined(MBEDTLS_CTR_DRBG_ENTROPY_LEN) */

#if !defined(MBEDTLS_CTR_DRBG_RESEED_INTERVAL)
#define MBEDTLS_CTR_DRBG_RESEED_INTERVAL    10000
/**< The interval before reseed is performed by default. */
#endif

#if !defined(MBEDTLS_CTR_DRBG_MAX_INPUT)
#define MBEDTLS_CTR_DRBG_MAX_INPUT          256
/**< The maximum number of additional input Bytes. */
#endif

#if !defined(MBEDTLS_CTR_DRBG_MAX_REQUEST)
#define MBEDTLS_CTR_DRBG_MAX_REQUEST        1024
/**< The maximum number of requested Bytes per call. */
#endif

#if !defined(MBEDTLS_CTR_DRBG_MAX_SEED_INPUT)
#define MBEDTLS_CTR_DRBG_MAX_SEED_INPUT     384
/**< The maximum size of seed or reseed buffer in bytes. */
#endif

/* \} name SECTION: Module settings */

#define MBEDTLS_CTR_DRBG_PR_OFF             0
/**< Prediction resistance is disabled. */
#define MBEDTLS_CTR_DRBG_PR_ON              1
/**< Prediction resistance is enabled. */

#ifdef __cplusplus
extern "C" {
#endif

#if MBEDTLS_CTR_DRBG_ENTROPY_LEN >= MBEDTLS_CTR_DRBG_KEYSIZE * 3 / 2
/** The default length of the nonce read from the entropy source.
 *
 * This is \c 0 because a single read from the entropy source is sufficient
 * to include a nonce.
 * See the documentation of mbedtls_ctr_drbg_seed() for more information.
 */
#define MBEDTLS_CTR_DRBG_ENTROPY_NONCE_LEN 0
#else
/** The default length of the nonce read from the entropy source.
 *
 * This is half of the default entropy length because a single read from
 * the entropy source does not provide enough material to form a nonce.
 * See the documentation of mbedtls_ctr_drbg_seed() for more information.
 */
#define MBEDTLS_CTR_DRBG_ENTROPY_NONCE_LEN ( MBEDTLS_CTR_DRBG_ENTROPY_LEN + 1 ) / 2
#endif

/**
 * \brief          The CTR_DRBG context structure.
 */
typedef struct mbedtls_ctr_drbg_context
{
    unsigned char counter[16];  /*!< The counter (V). */
    int reseed_counter;         /*!< The reseed counter.
                                 * This is the number of requests that have
                                 * been made since the last (re)seeding,
                                 * minus one.
                                 * Before the initial seeding, this field
                                 * contains the amount of entropy in bytes
                                 * to use as a nonce for the initial seeding,
                                 * or -1 if no nonce length has been explicitly
                                 * set (see mbedtls_ctr_drbg_set_nonce_len()).
                                 */
    int prediction_resistance;  /*!< This determines whether prediction
                                     resistance is enabled, that is
                                     whether to systematically reseed before
                                     each random generation. */
    size_t entropy_len;         /*!< The amount of entropy grabbed on each
                                     seed or reseed operation, in bytes. */
    int reseed_interval;        /*!< The reseed interval.
                                 * This is the maximum number of requests
                                 * that can be made between reseedings. */

    mbedtls_aes_context aes_ctx;        /*!< The AES context. */

    /*
     * Callbacks (Entropy)
     */
    int (*f_entropy)(void *, unsigned char *, size_t);
                                /*!< The entropy callback function. */

    void *p_entropy;            /*!< The context for the entropy function. */

#if defined(MBEDTLS_THREADING_C)
    /* Invariant: the mutex is initialized if and only if f_entropy != NULL.
     * This means that the mutex is initialized during the initial seeding
     * in mbedtls_ctr_drbg_seed() and freed in mbedtls_ctr_drbg_free().
     *
     * Note that this invariant may change without notice. Do not rely on it
     * and do not access the mutex directly in application code.
     */
    mbedtls_threading_mutex_t mutex;
#endif
}
mbedtls_ctr_drbg_context;

/**
 * \brief               This function initializes the CTR_DRBG context,
 *                      and prepares it for mbedtls_ctr_drbg_seed()
 *                      or mbedtls_ctr_drbg_free().
 *
 * \note                The reseed interval is
 *                      #MBEDTLS_CTR_DRBG_RESEED_INTERVAL by default.
 *                      You can override it by calling
 *                      mbedtls_ctr_drbg_set_reseed_interval().
 *
 * \param ctx           The CTR_DRBG context to initialize.
 */
void mbedtls_ctr_drbg_init( mbedtls_ctr_drbg_context *ctx );

/**
 * \brief               This function seeds and sets up the CTR_DRBG
 *                      entropy source for future reseeds.
 *
 * A typical choice for the \p f_entropy and \p p_entropy parameters is
 * to use the entropy module:
 * - \p f_entropy is mbedtls_entropy_func();
 * - \p p_entropy is an instance of ::mbedtls_entropy_context initialized
 *   with mbedtls_entropy_init() (which registers the platform's default
 *   entropy sources).
 *
 * The entropy length is #MBEDTLS_CTR_DRBG_ENTROPY_LEN by default.
 * You can override it by calling mbedtls_ctr_drbg_set_entropy_len().
 *
 * The entropy nonce length is:
 * - \c 0 if the entropy length is at least 3/2 times the entropy length,
 *   which guarantees that the security strength is the maximum permitted
 *   by the key size and entropy length according to NIST SP 800-90A §10.2.1;
 * - Half the entropy length otherwise.
 * You can override it by calling mbedtls_ctr_drbg_set_nonce_len().
 * With the default entropy length, the entropy nonce length is
 * #MBEDTLS_CTR_DRBG_ENTROPY_NONCE_LEN.
 *
 * You can provide a nonce and personalization string in addition to the
 * entropy source, to make this instantiation as unique as possible.
 * See SP 800-90A §8.6.7 for more details about nonces.
 *
 * The _seed_material_ value passed to the derivation function in
 * the CTR_DRBG Instantiate Process described in NIST SP 800-90A §10.2.1.3.2
 * is the concatenation of the following strings:
 * - A string obtained by calling \p f_entropy function for the entropy
 *   length.
 */
#if MBEDTLS_CTR_DRBG_ENTROPY_NONCE_LEN == 0
/**
 * - If mbedtls_ctr_drbg_set_nonce_len() has been called, a string
 *   obtained by calling \p f_entropy function for the specified length.
 */
#else
/**
 * - A string obtained by calling \p f_entropy function for the entropy nonce
 *   length. If the entropy nonce length is \c 0, this function does not
 *   make a second call to \p f_entropy.
 */
#endif
#if defined(MBEDTLS_THREADING_C)
/**
 * \note                When Mbed TLS is built with threading support,
 *                      after this function returns successfully,
 *                      it is safe to call mbedtls_ctr_drbg_random()
 *                      from multiple threads. Other operations, including
 *                      reseeding, are not thread-safe.
 */
#endif /* MBEDTLS_THREADING_C */
/**
 * - The \p custom string.
 *
 * \note                To achieve the nominal security strength permitted
 *                      by CTR_DRBG, the entropy length must be:
 *                      - at least 16 bytes for a 128-bit strength
 *                      (maximum achievable strength when using AES-128);
 *                      - at least 32 bytes for a 256-bit strength
 *                      (maximum achievable strength when using AES-256).
 *
 *                      In addition, if you do not pass a nonce in \p custom,
 *                      the sum of the entropy length
 *                      and the entropy nonce length must be:
 *                      - at least 24 bytes for a 128-bit strength
 *                      (maximum achievable strength when using AES-128);
 *                      - at least 48 bytes for a 256-bit strength
 *                      (maximum achievable strength when using AES-256).
 *
 * \param ctx           The CTR_DRBG context to seed.
 *                      It must have been initialized with
 *                      mbedtls_ctr_drbg_init().
 *                      After a successful call to mbedtls_ctr_drbg_seed(),
 *                      you may not call mbedtls_ctr_drbg_seed() again on
 *                      the same context unless you call
 *                      mbedtls_ctr_drbg_free() and mbedtls_ctr_drbg_init()
 *                      again first.
 *                      After a failed call to mbedtls_ctr_drbg_seed(),
 *                      you must call mbedtls_ctr_drbg_free().
 * \param f_entropy     The entropy callback, taking as arguments the
 *                      \p p_entropy context, the buffer to fill, and the
 *                      length of the buffer.
 *                      \p f_entropy is always called with a buffer size
 *                      less than or equal to the entropy length.
 * \param p_entropy     The entropy context to pass to \p f_entropy.
 * \param custom        The personalization string.
 *                      This can be \c NULL, in which case the personalization
 *                      string is empty regardless of the value of \p len.
 * \param len           The length of the personalization string.
 *                      This must be at most
 *                      #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT
 *                      - #MBEDTLS_CTR_DRBG_ENTROPY_LEN.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED on failure.
 */
int mbedtls_ctr_drbg_seed( mbedtls_ctr_drbg_context *ctx,
                   int (*f_entropy)(void *, unsigned char *, size_t),
                   void *p_entropy,
                   const unsigned char *custom,
                   size_t len );

/**
 * \brief               This function resets CTR_DRBG context to the state immediately
 *                      after initial call of mbedtls_ctr_drbg_init().
 *
 * \param ctx           The CTR_DRBG context to clear.
 */
void mbedtls_ctr_drbg_free( mbedtls_ctr_drbg_context *ctx );

/**
 * \brief               This function turns prediction resistance on or off.
 *                      The default value is off.
 *
 * \note                If enabled, entropy is gathered at the beginning of
 *                      every call to mbedtls_ctr_drbg_random_with_add()
 *                      or mbedtls_ctr_drbg_random().
 *                      Only use this if your entropy source has sufficient
 *                      throughput.
 *
 * \param ctx           The CTR_DRBG context.
 * \param resistance    #MBEDTLS_CTR_DRBG_PR_ON or #MBEDTLS_CTR_DRBG_PR_OFF.
 */
void mbedtls_ctr_drbg_set_prediction_resistance( mbedtls_ctr_drbg_context *ctx,
                                         int resistance );

/**
 * \brief               This function sets the amount of entropy grabbed on each
 *                      seed or reseed.
 *
 * The default value is #MBEDTLS_CTR_DRBG_ENTROPY_LEN.
 *
 * \note                The security strength of CTR_DRBG is bounded by the
 *                      entropy length. Thus:
 *                      - When using AES-256
 *                        (\c MBEDTLS_CTR_DRBG_USE_128_BIT_KEY is disabled,
 *                        which is the default),
 *                        \p len must be at least 32 (in bytes)
 *                        to achieve a 256-bit strength.
 *                      - When using AES-128
 *                        (\c MBEDTLS_CTR_DRBG_USE_128_BIT_KEY is enabled)
 *                        \p len must be at least 16 (in bytes)
 *                        to achieve a 128-bit strength.
 *
 * \param ctx           The CTR_DRBG context.
 * \param len           The amount of entropy to grab, in bytes.
 *                      This must be at most #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT
 *                      and at most the maximum length accepted by the
 *                      entropy function that is set in the context.
 */
void mbedtls_ctr_drbg_set_entropy_len( mbedtls_ctr_drbg_context *ctx,
                               size_t len );

/**
 * \brief               This function sets the amount of entropy grabbed
 *                      as a nonce for the initial seeding.
 *
 * Call this function before calling mbedtls_ctr_drbg_seed() to read
 * a nonce from the entropy source during the initial seeding.
 *
 * \param ctx           The CTR_DRBG context.
 * \param len           The amount of entropy to grab for the nonce, in bytes.
 *                      This must be at most #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT
 *                      and at most the maximum length accepted by the
 *                      entropy function that is set in the context.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG if \p len is
 *                      more than #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT.
 * \return              #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED
 *                      if the initial seeding has already taken place.
 */
int mbedtls_ctr_drbg_set_nonce_len( mbedtls_ctr_drbg_context *ctx,
                                    size_t len );

/**
 * \brief               This function sets the reseed interval.
 *
 * The reseed interval is the number of calls to mbedtls_ctr_drbg_random()
 * or mbedtls_ctr_drbg_random_with_add() after which the entropy function
 * is called again.
 *
 * The default value is #MBEDTLS_CTR_DRBG_RESEED_INTERVAL.
 *
 * \param ctx           The CTR_DRBG context.
 * \param interval      The reseed interval.
 */
void mbedtls_ctr_drbg_set_reseed_interval( mbedtls_ctr_drbg_context *ctx,
                                   int interval );

/**
 * \brief               This function reseeds the CTR_DRBG context, that is
 *                      extracts data from the entropy source.
 *
 * \note                This function is not thread-safe. It is not safe
 *                      to call this function if another thread might be
 *                      concurrently obtaining random numbers from the same
 *                      context or updating or reseeding the same context.
 *
 * \param ctx           The CTR_DRBG context.
 * \param additional    Additional data to add to the state. Can be \c NULL.
 * \param len           The length of the additional data.
 *                      This must be less than
 *                      #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT - \c entropy_len
 *                      where \c entropy_len is the entropy length
 *                      configured for the context.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED on failure.
 */
int mbedtls_ctr_drbg_reseed( mbedtls_ctr_drbg_context *ctx,
                     const unsigned char *additional, size_t len );

/**
 * \brief              This function updates the state of the CTR_DRBG context.
 *
 * \note                This function is not thread-safe. It is not safe
 *                      to call this function if another thread might be
 *                      concurrently obtaining random numbers from the same
 *                      context or updating or reseeding the same context.
 *
 * \param ctx          The CTR_DRBG context.
 * \param additional   The data to update the state with. This must not be
 *                     \c NULL unless \p add_len is \c 0.
 * \param add_len      Length of \p additional in bytes. This must be at
 *                     most #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT.
 *
 * \return             \c 0 on success.
 * \return             #MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG if
 *                     \p add_len is more than
 *                     #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT.
 * \return             An error from the underlying AES cipher on failure.
 */
int mbedtls_ctr_drbg_update_ret( mbedtls_ctr_drbg_context *ctx,
                                 const unsigned char *additional,
                                 size_t add_len );

/**
 * \brief   This function updates a CTR_DRBG instance with additional
 *          data and uses it to generate random data.
 *
 * This function automatically reseeds if the reseed counter is exceeded
 * or prediction resistance is enabled.
 *
 * \note                This function is not thread-safe. It is not safe
 *                      to call this function if another thread might be
 *                      concurrently obtaining random numbers from the same
 *                      context or updating or reseeding the same context.
 *
 * \param p_rng         The CTR_DRBG context. This must be a pointer to a
 *                      #mbedtls_ctr_drbg_context structure.
 * \param output        The buffer to fill.
 * \param output_len    The length of the buffer in bytes.
 * \param additional    Additional data to update. Can be \c NULL, in which
 *                      case the additional data is empty regardless of
 *                      the value of \p add_len.
 * \param add_len       The length of the additional data
 *                      if \p additional is not \c NULL.
 *                      This must be less than #MBEDTLS_CTR_DRBG_MAX_INPUT
 *                      and less than
 *                      #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT - \c entropy_len
 *                      where \c entropy_len is the entropy length
 *                      configured for the context.
 *
 * \return    \c 0 on success.
 * \return    #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED or
 *            #MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG on failure.
 */
int mbedtls_ctr_drbg_random_with_add( void *p_rng,
                              unsigned char *output, size_t output_len,
                              const unsigned char *additional, size_t add_len );

/**
 * \brief   This function uses CTR_DRBG to generate random data.
 *
 * This function automatically reseeds if the reseed counter is exceeded
 * or prediction resistance is enabled.
 */
#if defined(MBEDTLS_THREADING_C)
/**
 * \note                When Mbed TLS is built with threading support,
 *                      it is safe to call mbedtls_ctr_drbg_random()
 *                      from multiple threads. Other operations, including
 *                      reseeding, are not thread-safe.
 */
#endif /* MBEDTLS_THREADING_C */
/**
 * \param p_rng         The CTR_DRBG context. This must be a pointer to a
 *                      #mbedtls_ctr_drbg_context structure.
 * \param output        The buffer to fill.
 * \param output_len    The length of the buffer in bytes.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED or
 *                      #MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG on failure.
 */
int mbedtls_ctr_drbg_random( void *p_rng,
                     unsigned char *output, size_t output_len );


#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief              This function updates the state of the CTR_DRBG context.
 *
 * \deprecated         Superseded by mbedtls_ctr_drbg_update_ret()
 *                     in 2.16.0.
 *
 * \note               If \p add_len is greater than
 *                     #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT, only the first
 *                     #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT Bytes are used.
 *                     The remaining Bytes are silently discarded.
 *
 * \param ctx          The CTR_DRBG context.
 * \param additional   The data to update the state with.
 * \param add_len      Length of \p additional data.
 */
MBEDTLS_DEPRECATED void mbedtls_ctr_drbg_update(
    mbedtls_ctr_drbg_context *ctx,
    const unsigned char *additional,
    size_t add_len );
#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_FS_IO)
/**
 * \brief               This function writes a seed file.
 *
 * \param ctx           The CTR_DRBG context.
 * \param path          The name of the file.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR on file error.
 * \return              #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED on reseed
 *                      failure.
 */
int mbedtls_ctr_drbg_write_seed_file( mbedtls_ctr_drbg_context *ctx, const char *path );

/**
 * \brief               This function reads and updates a seed file. The seed
 *                      is added to this instance.
 *
 * \param ctx           The CTR_DRBG context.
 * \param path          The name of the file.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR on file error.
 * \return              #MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED on
 *                      reseed failure.
 * \return              #MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG if the existing
 *                      seed file is too large.
 */
int mbedtls_ctr_drbg_update_seed_file( mbedtls_ctr_drbg_context *ctx, const char *path );
#endif /* MBEDTLS_FS_IO */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief               The CTR_DRBG checkup routine.
 *
 * \return              \c 0 on success.
 * \return              \c 1 on failure.
 */
int mbedtls_ctr_drbg_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* ctr_drbg.h */


/********* Start of file include/mbedtls/des.h ************/

/**
 * \file des.h
 *
 * \brief DES block cipher
 *
 * \warning   DES is considered a weak cipher and its use constitutes a
 *            security risk. We recommend considering stronger ciphers
 *            instead.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
#ifndef MBEDTLS_DES_H
#define MBEDTLS_DES_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif


#include <stddef.h>
#include <stdint.h>

#define MBEDTLS_DES_ENCRYPT     1
#define MBEDTLS_DES_DECRYPT     0

/** The data input has an invalid length. */
#define MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH              -0x0032

/* MBEDTLS_ERR_DES_HW_ACCEL_FAILED is deprecated and should not be used. */
/** DES hardware accelerator failed. */
#define MBEDTLS_ERR_DES_HW_ACCEL_FAILED                   -0x0033

#define MBEDTLS_DES_KEY_SIZE    8

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_DES_ALT)
// Regular implementation
//

/**
 * \brief          DES context structure
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
typedef struct mbedtls_des_context
{
    uint32_t sk[32];            /*!<  DES subkeys       */
}
mbedtls_des_context;

/**
 * \brief          Triple-DES context structure
 */
typedef struct mbedtls_des3_context
{
    uint32_t sk[96];            /*!<  3DES subkeys      */
}
mbedtls_des3_context;

#else  /* MBEDTLS_DES_ALT */

#endif /* MBEDTLS_DES_ALT */

/**
 * \brief          Initialize DES context
 *
 * \param ctx      DES context to be initialized
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
void mbedtls_des_init( mbedtls_des_context *ctx );

/**
 * \brief          Clear DES context
 *
 * \param ctx      DES context to be cleared
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
void mbedtls_des_free( mbedtls_des_context *ctx );

/**
 * \brief          Initialize Triple-DES context
 *
 * \param ctx      DES3 context to be initialized
 */
void mbedtls_des3_init( mbedtls_des3_context *ctx );

/**
 * \brief          Clear Triple-DES context
 *
 * \param ctx      DES3 context to be cleared
 */
void mbedtls_des3_free( mbedtls_des3_context *ctx );

/**
 * \brief          Set key parity on the given key to odd.
 *
 *                 DES keys are 56 bits long, but each byte is padded with
 *                 a parity bit to allow verification.
 *
 * \param key      8-byte secret key
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
void mbedtls_des_key_set_parity( unsigned char key[MBEDTLS_DES_KEY_SIZE] );

/**
 * \brief          Check that key parity on the given key is odd.
 *
 *                 DES keys are 56 bits long, but each byte is padded with
 *                 a parity bit to allow verification.
 *
 * \param key      8-byte secret key
 *
 * \return         0 is parity was ok, 1 if parity was not correct.
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des_key_check_key_parity( const unsigned char key[MBEDTLS_DES_KEY_SIZE] );

/**
 * \brief          Check that key is not a weak or semi-weak DES key
 *
 * \param key      8-byte secret key
 *
 * \return         0 if no weak key was found, 1 if a weak key was identified.
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des_key_check_weak( const unsigned char key[MBEDTLS_DES_KEY_SIZE] );

/**
 * \brief          DES key schedule (56-bit, encryption)
 *
 * \param ctx      DES context to be initialized
 * \param key      8-byte secret key
 *
 * \return         0
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des_setkey_enc( mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE] );

/**
 * \brief          DES key schedule (56-bit, decryption)
 *
 * \param ctx      DES context to be initialized
 * \param key      8-byte secret key
 *
 * \return         0
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des_setkey_dec( mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE] );

/**
 * \brief          Triple-DES key schedule (112-bit, encryption)
 *
 * \param ctx      3DES context to be initialized
 * \param key      16-byte secret key
 *
 * \return         0
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des3_set2key_enc( mbedtls_des3_context *ctx,
                      const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2] );

/**
 * \brief          Triple-DES key schedule (112-bit, decryption)
 *
 * \param ctx      3DES context to be initialized
 * \param key      16-byte secret key
 *
 * \return         0
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des3_set2key_dec( mbedtls_des3_context *ctx,
                      const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2] );

/**
 * \brief          Triple-DES key schedule (168-bit, encryption)
 *
 * \param ctx      3DES context to be initialized
 * \param key      24-byte secret key
 *
 * \return         0
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des3_set3key_enc( mbedtls_des3_context *ctx,
                      const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3] );

/**
 * \brief          Triple-DES key schedule (168-bit, decryption)
 *
 * \param ctx      3DES context to be initialized
 * \param key      24-byte secret key
 *
 * \return         0
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des3_set3key_dec( mbedtls_des3_context *ctx,
                      const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3] );

/**
 * \brief          DES-ECB block encryption/decryption
 *
 * \param ctx      DES context
 * \param input    64-bit input block
 * \param output   64-bit output block
 *
 * \return         0 if successful
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des_crypt_ecb( mbedtls_des_context *ctx,
                    const unsigned char input[8],
                    unsigned char output[8] );

#if defined(MBEDTLS_CIPHER_MODE_CBC)
/**
 * \brief          DES-CBC buffer encryption/decryption
 *
 * \note           Upon exit, the content of the IV is updated so that you can
 *                 call the function same function again on the following
 *                 block(s) of data and get the same result as if it was
 *                 encrypted in one call. This allows a "streaming" usage.
 *                 If on the other hand you need to retain the contents of the
 *                 IV, you should either save it manually or use the cipher
 *                 module instead.
 *
 * \param ctx      DES context
 * \param mode     MBEDTLS_DES_ENCRYPT or MBEDTLS_DES_DECRYPT
 * \param length   length of the input data
 * \param iv       initialization vector (updated after use)
 * \param input    buffer holding the input data
 * \param output   buffer holding the output data
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des_crypt_cbc( mbedtls_des_context *ctx,
                    int mode,
                    size_t length,
                    unsigned char iv[8],
                    const unsigned char *input,
                    unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CBC */

/**
 * \brief          3DES-ECB block encryption/decryption
 *
 * \param ctx      3DES context
 * \param input    64-bit input block
 * \param output   64-bit output block
 *
 * \return         0 if successful
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des3_crypt_ecb( mbedtls_des3_context *ctx,
                     const unsigned char input[8],
                     unsigned char output[8] );

#if defined(MBEDTLS_CIPHER_MODE_CBC)
/**
 * \brief          3DES-CBC buffer encryption/decryption
 *
 * \note           Upon exit, the content of the IV is updated so that you can
 *                 call the function same function again on the following
 *                 block(s) of data and get the same result as if it was
 *                 encrypted in one call. This allows a "streaming" usage.
 *                 If on the other hand you need to retain the contents of the
 *                 IV, you should either save it manually or use the cipher
 *                 module instead.
 *
 * \param ctx      3DES context
 * \param mode     MBEDTLS_DES_ENCRYPT or MBEDTLS_DES_DECRYPT
 * \param length   length of the input data
 * \param iv       initialization vector (updated after use)
 * \param input    buffer holding the input data
 * \param output   buffer holding the output data
 *
 * \return         0 if successful, or MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH
 */
MBEDTLS_CHECK_RETURN_TYPICAL
int mbedtls_des3_crypt_cbc( mbedtls_des3_context *ctx,
                     int mode,
                     size_t length,
                     unsigned char iv[8],
                     const unsigned char *input,
                     unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CBC */

/**
 * \brief          Internal function for key expansion.
 *                 (Only exposed to allow overriding it,
 *                 see MBEDTLS_DES_SETKEY_ALT)
 *
 * \param SK       Round keys
 * \param key      Base key
 *
 * \warning        DES is considered a weak cipher and its use constitutes a
 *                 security risk. We recommend considering stronger ciphers
 *                 instead.
 */
void mbedtls_des_setkey( uint32_t SK[32],
                         const unsigned char key[MBEDTLS_DES_KEY_SIZE] );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
MBEDTLS_CHECK_RETURN_CRITICAL
int mbedtls_des_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* des.h */


/********* Start of file include/mbedtls/entropy.h ************/

/**
 * \file entropy.h
 *
 * \brief Entropy accumulator implementation
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_ENTROPY_H
#define MBEDTLS_ENTROPY_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_ENTROPY_FORCE_SHA256)

#define MBEDTLS_ENTROPY_SHA512_ACCUMULATOR
#else
#if defined(MBEDTLS_SHA256_C)
#define MBEDTLS_ENTROPY_SHA256_ACCUMULATOR

#endif
#endif

#if defined(MBEDTLS_THREADING_C)

#endif

#if defined(MBEDTLS_HAVEGE_C)

#endif

/** Critical entropy source failure. */
#define MBEDTLS_ERR_ENTROPY_SOURCE_FAILED                 -0x003C
/** No more sources can be added. */
#define MBEDTLS_ERR_ENTROPY_MAX_SOURCES                   -0x003E
/** No sources have been added to poll. */
#define MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED            -0x0040
/** No strong sources have been added to poll. */
#define MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE              -0x003D
/** Read/write error in file. */
#define MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR                 -0x003F

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */

#if !defined(MBEDTLS_ENTROPY_MAX_SOURCES)
#define MBEDTLS_ENTROPY_MAX_SOURCES     20      /**< Maximum number of sources supported */
#endif

#if !defined(MBEDTLS_ENTROPY_MAX_GATHER)
#define MBEDTLS_ENTROPY_MAX_GATHER      128     /**< Maximum amount requested from entropy sources */
#endif

/* \} name SECTION: Module settings */

#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
#define MBEDTLS_ENTROPY_BLOCK_SIZE      64      /**< Block size of entropy accumulator (SHA-512) */
#else
#define MBEDTLS_ENTROPY_BLOCK_SIZE      32      /**< Block size of entropy accumulator (SHA-256) */
#endif

#define MBEDTLS_ENTROPY_MAX_SEED_SIZE   1024    /**< Maximum size of seed we read from seed file */
#define MBEDTLS_ENTROPY_SOURCE_MANUAL   MBEDTLS_ENTROPY_MAX_SOURCES

#define MBEDTLS_ENTROPY_SOURCE_STRONG   1       /**< Entropy source is strong   */
#define MBEDTLS_ENTROPY_SOURCE_WEAK     0       /**< Entropy source is weak     */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief           Entropy poll callback pointer
 *
 * \param data      Callback-specific data pointer
 * \param output    Data to fill
 * \param len       Maximum size to provide
 * \param olen      The actual amount of bytes put into the buffer (Can be 0)
 *
 * \return          0 if no critical failures occurred,
 *                  MBEDTLS_ERR_ENTROPY_SOURCE_FAILED otherwise
 */
typedef int (*mbedtls_entropy_f_source_ptr)(void *data, unsigned char *output, size_t len,
                            size_t *olen);

/**
 * \brief           Entropy source state
 */
typedef struct mbedtls_entropy_source_state
{
    mbedtls_entropy_f_source_ptr    f_source;   /**< The entropy source callback */
    void *          p_source;   /**< The callback data pointer */
    size_t          size;       /**< Amount received in bytes */
    size_t          threshold;  /**< Minimum bytes required before release */
    int             strong;     /**< Is the source strong? */
}
mbedtls_entropy_source_state;

/**
 * \brief           Entropy context structure
 */
typedef struct mbedtls_entropy_context
{
    int accumulator_started; /* 0 after init.
                              * 1 after the first update.
                              * -1 after free. */
#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
    mbedtls_sha512_context  accumulator;
#elif defined(MBEDTLS_ENTROPY_SHA256_ACCUMULATOR)
    mbedtls_sha256_context  accumulator;
#endif
    int             source_count; /* Number of entries used in source. */
    mbedtls_entropy_source_state    source[MBEDTLS_ENTROPY_MAX_SOURCES];
#if defined(MBEDTLS_HAVEGE_C)
    mbedtls_havege_state    havege_data;
#endif
#if defined(MBEDTLS_THREADING_C)
    mbedtls_threading_mutex_t mutex;    /*!< mutex                  */
#endif
#if defined(MBEDTLS_ENTROPY_NV_SEED)
    int initial_entropy_run;
#endif
}
mbedtls_entropy_context;

/**
 * \brief           Initialize the context
 *
 * \param ctx       Entropy context to initialize
 */
void mbedtls_entropy_init( mbedtls_entropy_context *ctx );

/**
 * \brief           Free the data in the context
 *
 * \param ctx       Entropy context to free
 */
void mbedtls_entropy_free( mbedtls_entropy_context *ctx );

/**
 * \brief           Adds an entropy source to poll
 *                  (Thread-safe if MBEDTLS_THREADING_C is enabled)
 *
 * \param ctx       Entropy context
 * \param f_source  Entropy function
 * \param p_source  Function data
 * \param threshold Minimum required from source before entropy is released
 *                  ( with mbedtls_entropy_func() ) (in bytes)
 * \param strong    MBEDTLS_ENTROPY_SOURCE_STRONG or
 *                  MBEDTLS_ENTROPY_SOURCE_WEAK.
 *                  At least one strong source needs to be added.
 *                  Weaker sources (such as the cycle counter) can be used as
 *                  a complement.
 *
 * \return          0 if successful or MBEDTLS_ERR_ENTROPY_MAX_SOURCES
 */
int mbedtls_entropy_add_source( mbedtls_entropy_context *ctx,
                        mbedtls_entropy_f_source_ptr f_source, void *p_source,
                        size_t threshold, int strong );

/**
 * \brief           Trigger an extra gather poll for the accumulator
 *                  (Thread-safe if MBEDTLS_THREADING_C is enabled)
 *
 * \param ctx       Entropy context
 *
 * \return          0 if successful, or MBEDTLS_ERR_ENTROPY_SOURCE_FAILED
 */
int mbedtls_entropy_gather( mbedtls_entropy_context *ctx );

/**
 * \brief           Retrieve entropy from the accumulator
 *                  (Maximum length: MBEDTLS_ENTROPY_BLOCK_SIZE)
 *                  (Thread-safe if MBEDTLS_THREADING_C is enabled)
 *
 * \param data      Entropy context
 * \param output    Buffer to fill
 * \param len       Number of bytes desired, must be at most MBEDTLS_ENTROPY_BLOCK_SIZE
 *
 * \return          0 if successful, or MBEDTLS_ERR_ENTROPY_SOURCE_FAILED
 */
int mbedtls_entropy_func( void *data, unsigned char *output, size_t len );

/**
 * \brief           Add data to the accumulator manually
 *                  (Thread-safe if MBEDTLS_THREADING_C is enabled)
 *
 * \param ctx       Entropy context
 * \param data      Data to add
 * \param len       Length of data
 *
 * \return          0 if successful
 */
int mbedtls_entropy_update_manual( mbedtls_entropy_context *ctx,
                           const unsigned char *data, size_t len );

#if defined(MBEDTLS_ENTROPY_NV_SEED)
/**
 * \brief           Trigger an update of the seed file in NV by using the
 *                  current entropy pool.
 *
 * \param ctx       Entropy context
 *
 * \return          0 if successful
 */
int mbedtls_entropy_update_nv_seed( mbedtls_entropy_context *ctx );
#endif /* MBEDTLS_ENTROPY_NV_SEED */

#if defined(MBEDTLS_FS_IO)
/**
 * \brief               Write a seed file
 *
 * \param ctx           Entropy context
 * \param path          Name of the file
 *
 * \return              0 if successful,
 *                      MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR on file error, or
 *                      MBEDTLS_ERR_ENTROPY_SOURCE_FAILED
 */
int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *path );

/**
 * \brief               Read and update a seed file. Seed is added to this
 *                      instance. No more than MBEDTLS_ENTROPY_MAX_SEED_SIZE bytes are
 *                      read from the seed file. The rest is ignored.
 *
 * \param ctx           Entropy context
 * \param path          Name of the file
 *
 * \return              0 if successful,
 *                      MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR on file error,
 *                      MBEDTLS_ERR_ENTROPY_SOURCE_FAILED
 */
int mbedtls_entropy_update_seed_file( mbedtls_entropy_context *ctx, const char *path );
#endif /* MBEDTLS_FS_IO */

#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief          Checkup routine
 *
 *                 This module self-test also calls the entropy self-test,
 *                 mbedtls_entropy_source_self_test();
 *
 * \return         0 if successful, or 1 if a test failed
 */
int mbedtls_entropy_self_test( int verbose );

#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
/**
 * \brief          Checkup routine
 *
 *                 Verifies the integrity of the hardware entropy source
 *                 provided by the function 'mbedtls_hardware_poll()'.
 *
 *                 Note this is the only hardware entropy source that is known
 *                 at link time, and other entropy sources configured
 *                 dynamically at runtime by the function
 *                 mbedtls_entropy_add_source() will not be tested.
 *
 * \return         0 if successful, or 1 if a test failed
 */
int mbedtls_entropy_source_self_test( int verbose );
#endif /* MBEDTLS_ENTROPY_HARDWARE_ALT */
#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* entropy.h */


/********* Start of file include/mbedtls/entropy_poll.h ************/

/**
 * \file entropy_poll.h
 *
 * \brief Platform-specific and custom entropy polling functions
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_ENTROPY_POLL_H
#define MBEDTLS_ENTROPY_POLL_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Default thresholds for built-in sources, in bytes
 */
#define MBEDTLS_ENTROPY_MIN_PLATFORM     32     /**< Minimum for platform source    */
#define MBEDTLS_ENTROPY_MIN_HAVEGE       32     /**< Minimum for HAVEGE             */
#define MBEDTLS_ENTROPY_MIN_HARDCLOCK     4     /**< Minimum for mbedtls_timing_hardclock()        */
#if !defined(MBEDTLS_ENTROPY_MIN_HARDWARE)
#define MBEDTLS_ENTROPY_MIN_HARDWARE     32     /**< Minimum for the hardware source */
#endif

/**
 * \brief           Entropy poll callback that provides 0 entropy.
 */
#if defined(MBEDTLS_TEST_NULL_ENTROPY)
    int mbedtls_null_entropy_poll( void *data,
                                unsigned char *output, size_t len, size_t *olen );
#endif

#if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
/**
 * \brief           Platform-specific entropy poll callback
 */
int mbedtls_platform_entropy_poll( void *data,
                           unsigned char *output, size_t len, size_t *olen );
#endif

#if defined(MBEDTLS_HAVEGE_C)
/**
 * \brief           HAVEGE based entropy poll callback
 *
 * Requires an HAVEGE state as its data pointer.
 */
int mbedtls_havege_poll( void *data,
                 unsigned char *output, size_t len, size_t *olen );
#endif

#if defined(MBEDTLS_TIMING_C)
/**
 * \brief           mbedtls_timing_hardclock-based entropy poll callback
 */
int mbedtls_hardclock_poll( void *data,
                    unsigned char *output, size_t len, size_t *olen );
#endif

#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
/**
 * \brief           Entropy poll callback for a hardware source
 *
 * \warning         This is not provided by mbed TLS!
 *                  See \c MBEDTLS_ENTROPY_HARDWARE_ALT in config.h.
 *
 * \note            This must accept NULL as its first argument.
 */
int mbedtls_hardware_poll( void *data,
                           unsigned char *output, size_t len, size_t *olen );
#endif

#if defined(MBEDTLS_ENTROPY_NV_SEED)
/**
 * \brief           Entropy poll callback for a non-volatile seed file
 *
 * \note            This must accept NULL as its first argument.
 */
int mbedtls_nv_seed_poll( void *data,
                          unsigned char *output, size_t len, size_t *olen );
#endif

#ifdef __cplusplus
}
#endif

#endif /* entropy_poll.h */


/********* Start of file include/mbedtls/havege.h ************/

/**
 * \file havege.h
 *
 * \brief HAVEGE: HArdware Volatile Entropy Gathering and Expansion
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_HAVEGE_H
#define MBEDTLS_HAVEGE_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

#define MBEDTLS_HAVEGE_COLLECT_SIZE 1024

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief          HAVEGE state structure
 */
typedef struct mbedtls_havege_state
{
    uint32_t PT1, PT2, offset[2];
    uint32_t pool[MBEDTLS_HAVEGE_COLLECT_SIZE];
    uint32_t WALK[8192];
}
mbedtls_havege_state;

/**
 * \brief          HAVEGE initialization
 *
 * \param hs       HAVEGE state to be initialized
 */
void mbedtls_havege_init( mbedtls_havege_state *hs );

/**
 * \brief          Clear HAVEGE state
 *
 * \param hs       HAVEGE state to be cleared
 */
void mbedtls_havege_free( mbedtls_havege_state *hs );

/**
 * \brief          HAVEGE rand function
 *
 * \param p_rng    A HAVEGE state
 * \param output   Buffer to fill
 * \param len      Length of buffer
 *
 * \return         0
 */
int mbedtls_havege_random( void *p_rng, unsigned char *output, size_t len );

#ifdef __cplusplus
}
#endif

#endif /* havege.h */


/********* Start of file include/mbedtls/memory_buffer_alloc.h ************/

/**
 * \file memory_buffer_alloc.h
 *
 * \brief Buffer-based memory allocator
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_MEMORY_BUFFER_ALLOC_H
#define MBEDTLS_MEMORY_BUFFER_ALLOC_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */

#if !defined(MBEDTLS_MEMORY_ALIGN_MULTIPLE)
#define MBEDTLS_MEMORY_ALIGN_MULTIPLE       4 /**< Align on multiples of this value */
#endif

/* \} name SECTION: Module settings */

#define MBEDTLS_MEMORY_VERIFY_NONE         0
#define MBEDTLS_MEMORY_VERIFY_ALLOC        (1 << 0)
#define MBEDTLS_MEMORY_VERIFY_FREE         (1 << 1)
#define MBEDTLS_MEMORY_VERIFY_ALWAYS       (MBEDTLS_MEMORY_VERIFY_ALLOC | MBEDTLS_MEMORY_VERIFY_FREE)

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief   Initialize use of stack-based memory allocator.
 *          The stack-based allocator does memory management inside the
 *          presented buffer and does not call calloc() and free().
 *          It sets the global mbedtls_calloc() and mbedtls_free() pointers
 *          to its own functions.
 *          (Provided mbedtls_calloc() and mbedtls_free() are thread-safe if
 *           MBEDTLS_THREADING_C is defined)
 *
 * \note    This code is not optimized and provides a straight-forward
 *          implementation of a stack-based memory allocator.
 *
 * \param buf   buffer to use as heap
 * \param len   size of the buffer
 */
void mbedtls_memory_buffer_alloc_init( unsigned char *buf, size_t len );

/**
 * \brief   Free the mutex for thread-safety and clear remaining memory
 */
void mbedtls_memory_buffer_alloc_free( void );

/**
 * \brief   Determine when the allocator should automatically verify the state
 *          of the entire chain of headers / meta-data.
 *          (Default: MBEDTLS_MEMORY_VERIFY_NONE)
 *
 * \param verify    One of MBEDTLS_MEMORY_VERIFY_NONE, MBEDTLS_MEMORY_VERIFY_ALLOC,
 *                  MBEDTLS_MEMORY_VERIFY_FREE or MBEDTLS_MEMORY_VERIFY_ALWAYS
 */
void mbedtls_memory_buffer_set_verify( int verify );

#if defined(MBEDTLS_MEMORY_DEBUG)
/**
 * \brief   Print out the status of the allocated memory (primarily for use
 *          after a program should have de-allocated all memory)
 *          Prints out a list of 'still allocated' blocks and their stack
 *          trace if MBEDTLS_MEMORY_BACKTRACE is defined.
 */
void mbedtls_memory_buffer_alloc_status( void );

/**
 * \brief   Get the peak heap usage so far
 *
 * \param max_used      Peak number of bytes in use or committed. This
 *                      includes bytes in allocated blocks too small to split
 *                      into smaller blocks but larger than the requested size.
 * \param max_blocks    Peak number of blocks in use, including free and used
 */
void mbedtls_memory_buffer_alloc_max_get( size_t *max_used, size_t *max_blocks );

/**
 * \brief   Reset peak statistics
 */
void mbedtls_memory_buffer_alloc_max_reset( void );

/**
 * \brief   Get the current heap usage
 *
 * \param cur_used      Current number of bytes in use or committed. This
 *                      includes bytes in allocated blocks too small to split
 *                      into smaller blocks but larger than the requested size.
 * \param cur_blocks    Current number of blocks in use, including free and used
 */
void mbedtls_memory_buffer_alloc_cur_get( size_t *cur_used, size_t *cur_blocks );
#endif /* MBEDTLS_MEMORY_DEBUG */

/**
 * \brief   Verifies that all headers in the memory buffer are correct
 *          and contain sane values. Helps debug buffer-overflow errors.
 *
 *          Prints out first failure if MBEDTLS_MEMORY_DEBUG is defined.
 *          Prints out full header information if MBEDTLS_MEMORY_DEBUG
 *          is defined. (Includes stack trace information for each block if
 *          MBEDTLS_MEMORY_BACKTRACE is defined as well).
 *
 * \return             0 if verified, 1 otherwise
 */
int mbedtls_memory_buffer_alloc_verify( void );

#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if a test failed
 */
int mbedtls_memory_buffer_alloc_self_test( int verbose );
#endif

#ifdef __cplusplus
}
#endif

#endif /* memory_buffer_alloc.h */


/********* Start of file include/mbedtls/padlock.h ************/

/**
 * \file padlock.h
 *
 * \brief VIA PadLock ACE for HW encryption/decryption supported by some
 *        processors
 *
 * \warning These functions are only for internal use by other library
 *          functions; you must not call them directly.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_PADLOCK_H
#define MBEDTLS_PADLOCK_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



/** Input data should be aligned. */
#define MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED               -0x0030

#if defined(__has_feature)
#if __has_feature(address_sanitizer)
#define MBEDTLS_HAVE_ASAN
#endif
#endif

/* Some versions of ASan result in errors about not enough registers */
#if defined(MBEDTLS_HAVE_ASM) && defined(__GNUC__) && defined(__i386__) && \
    !defined(MBEDTLS_HAVE_ASAN)

#ifndef MBEDTLS_HAVE_X86
#define MBEDTLS_HAVE_X86
#endif

#include <stdint.h>

#define MBEDTLS_PADLOCK_RNG 0x000C
#define MBEDTLS_PADLOCK_ACE 0x00C0
#define MBEDTLS_PADLOCK_PHE 0x0C00
#define MBEDTLS_PADLOCK_PMM 0x3000

#define MBEDTLS_PADLOCK_ALIGN16(x) (uint32_t *) (16 + ((int32_t) (x) & ~15))

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief          Internal PadLock detection routine
 *
 * \note           This function is only for internal use by other library
 *                 functions; you must not call it directly.
 *
 * \param feature  The feature to detect
 *
 * \return         non-zero if CPU has support for the feature, 0 otherwise
 */
int mbedtls_padlock_has_support( int feature );

/**
 * \brief          Internal PadLock AES-ECB block en(de)cryption
 *
 * \note           This function is only for internal use by other library
 *                 functions; you must not call it directly.
 *
 * \param ctx      AES context
 * \param mode     MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
 * \param input    16-byte input block
 * \param output   16-byte output block
 *
 * \return         0 if success, 1 if operation failed
 */
int mbedtls_padlock_xcryptecb( mbedtls_aes_context *ctx,
                               int mode,
                               const unsigned char input[16],
                               unsigned char output[16] );

/**
 * \brief          Internal PadLock AES-CBC buffer en(de)cryption
 *
 * \note           This function is only for internal use by other library
 *                 functions; you must not call it directly.
 *
 * \param ctx      AES context
 * \param mode     MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
 * \param length   length of the input data
 * \param iv       initialization vector (updated after use)
 * \param input    buffer holding the input data
 * \param output   buffer holding the output data
 *
 * \return         0 if success, 1 if operation failed
 */
int mbedtls_padlock_xcryptcbc( mbedtls_aes_context *ctx,
                               int mode,
                               size_t length,
                               unsigned char iv[16],
                               const unsigned char *input,
                               unsigned char *output );

#ifdef __cplusplus
}
#endif

#endif /* HAVE_X86  */

#endif /* padlock.h */


/********* Start of file include/mbedtls/timing.h ************/

/**
 * \file timing.h
 *
 * \brief Portable interface to timeouts and to the CPU cycle counter
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_TIMING_H
#define MBEDTLS_TIMING_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_TIMING_ALT)
// Regular implementation
//

/**
 * \brief          timer structure
 */
struct mbedtls_timing_hr_time
{
    unsigned char opaque[32];
};

/**
 * \brief          Context for mbedtls_timing_set/get_delay()
 */
typedef struct mbedtls_timing_delay_context
{
    struct mbedtls_timing_hr_time   timer;
    uint32_t                        int_ms;
    uint32_t                        fin_ms;
} mbedtls_timing_delay_context;

#else  /* MBEDTLS_TIMING_ALT */

#endif /* MBEDTLS_TIMING_ALT */

extern volatile int mbedtls_timing_alarmed;

/**
 * \brief          Return the CPU cycle counter value
 *
 * \warning        This is only a best effort! Do not rely on this!
 *                 In particular, it is known to be unreliable on virtual
 *                 machines.
 *
 * \note           This value starts at an unspecified origin and
 *                 may wrap around.
 */
unsigned long mbedtls_timing_hardclock( void );

/**
 * \brief          Return the elapsed time in milliseconds
 *
 * \param val      points to a timer structure
 * \param reset    If 0, query the elapsed time. Otherwise (re)start the timer.
 *
 * \return         Elapsed time since the previous reset in ms. When
 *                 restarting, this is always 0.
 *
 * \note           To initialize a timer, call this function with reset=1.
 *
 *                 Determining the elapsed time and resetting the timer is not
 *                 atomic on all platforms, so after the sequence
 *                 `{ get_timer(1); ...; time1 = get_timer(1); ...; time2 =
 *                 get_timer(0) }` the value time1+time2 is only approximately
 *                 the delay since the first reset.
 */
unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset );

/**
 * \brief          Setup an alarm clock
 *
 * \param seconds  delay before the "mbedtls_timing_alarmed" flag is set
 *                 (must be >=0)
 *
 * \warning        Only one alarm at a time  is supported. In a threaded
 *                 context, this means one for the whole process, not one per
 *                 thread.
 */
void mbedtls_set_alarm( int seconds );

/**
 * \brief          Set a pair of delays to watch
 *                 (See \c mbedtls_timing_get_delay().)
 *
 * \param data     Pointer to timing data.
 *                 Must point to a valid \c mbedtls_timing_delay_context struct.
 * \param int_ms   First (intermediate) delay in milliseconds.
 *                 The effect if int_ms > fin_ms is unspecified.
 * \param fin_ms   Second (final) delay in milliseconds.
 *                 Pass 0 to cancel the current delay.
 *
 * \note           To set a single delay, either use \c mbedtls_timing_set_timer
 *                 directly or use this function with int_ms == fin_ms.
 */
void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms );

/**
 * \brief          Get the status of delays
 *                 (Memory helper: number of delays passed.)
 *
 * \param data     Pointer to timing data
 *                 Must point to a valid \c mbedtls_timing_delay_context struct.
 *
 * \return         -1 if cancelled (fin_ms = 0),
 *                  0 if none of the delays are passed,
 *                  1 if only the intermediate delay is passed,
 *                  2 if the final delay is passed.
 */
int mbedtls_timing_get_delay( void *data );

#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if a test failed
 */
int mbedtls_timing_self_test( int verbose );
#endif

#ifdef __cplusplus
}
#endif

#endif /* timing.h */


/********* Start of file include/mbedtls/xtea.h ************/

/**
 * \file xtea.h
 *
 * \brief XTEA block cipher (32-bit)
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_XTEA_H
#define MBEDTLS_XTEA_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

#define MBEDTLS_XTEA_ENCRYPT     1
#define MBEDTLS_XTEA_DECRYPT     0

/** The data input has an invalid length. */
#define MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH             -0x0028

/* MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED is deprecated and should not be used. */
/** XTEA hardware accelerator failed. */
#define MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED                  -0x0029

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_XTEA_ALT)
// Regular implementation
//

/**
 * \brief          XTEA context structure
 */
typedef struct mbedtls_xtea_context
{
    uint32_t k[4];       /*!< key */
}
mbedtls_xtea_context;

#else  /* MBEDTLS_XTEA_ALT */

#endif /* MBEDTLS_XTEA_ALT */

/**
 * \brief          Initialize XTEA context
 *
 * \param ctx      XTEA context to be initialized
 */
void mbedtls_xtea_init( mbedtls_xtea_context *ctx );

/**
 * \brief          Clear XTEA context
 *
 * \param ctx      XTEA context to be cleared
 */
void mbedtls_xtea_free( mbedtls_xtea_context *ctx );

/**
 * \brief          XTEA key schedule
 *
 * \param ctx      XTEA context to be initialized
 * \param key      the secret key
 */
void mbedtls_xtea_setup( mbedtls_xtea_context *ctx, const unsigned char key[16] );

/**
 * \brief          XTEA cipher function
 *
 * \param ctx      XTEA context
 * \param mode     MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
 * \param input    8-byte input block
 * \param output   8-byte output block
 *
 * \return         0 if successful
 */
int mbedtls_xtea_crypt_ecb( mbedtls_xtea_context *ctx,
                    int mode,
                    const unsigned char input[8],
                    unsigned char output[8] );

#if defined(MBEDTLS_CIPHER_MODE_CBC)
/**
 * \brief          XTEA CBC cipher function
 *
 * \param ctx      XTEA context
 * \param mode     MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
 * \param length   the length of input, multiple of 8
 * \param iv       initialization vector for CBC mode
 * \param input    input block
 * \param output   output block
 *
 * \return         0 if successful,
 *                 MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0
 */
int mbedtls_xtea_crypt_cbc( mbedtls_xtea_context *ctx,
                    int mode,
                    size_t length,
                    unsigned char iv[8],
                    const unsigned char *input,
                    unsigned char *output);
#endif /* MBEDTLS_CIPHER_MODE_CBC */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int mbedtls_xtea_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* xtea.h */


/********* Start of file include/mbedtls/ssl.h ************/

/**
 * \file ssl.h
 *
 * \brief SSL/TLS functions.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SSL_H
#define MBEDTLS_SSL_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif






#if defined(MBEDTLS_X509_CRT_PARSE_C)


#endif

#if defined(MBEDTLS_DHM_C)

#endif

/* Adding guard for MBEDTLS_ECDSA_C to ensure no compile errors due
 * to guards also being in ssl_srv.c and ssl_cli.c. There is a gap
 * in functionality that access to ecdh_ctx structure is needed for
 * MBEDTLS_ECDSA_C which does not seem correct.
 */
#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)

#endif

#if defined(MBEDTLS_ZLIB_SUPPORT)

#if defined(MBEDTLS_DEPRECATED_WARNING)
#warning "Record compression support via MBEDTLS_ZLIB_SUPPORT is deprecated and will be removed in the next major revision of the library"
#endif

#if defined(MBEDTLS_DEPRECATED_REMOVED)
#error "Record compression support via MBEDTLS_ZLIB_SUPPORT is deprecated and cannot be used if MBEDTLS_DEPRECATED_REMOVED is set"
#endif


#endif

#if defined(MBEDTLS_HAVE_TIME)

#endif

#if defined(MBEDTLS_USE_PSA_CRYPTO)

#endif /* MBEDTLS_USE_PSA_CRYPTO */

/*
 * SSL Error codes
 */
/** The requested feature is not available. */
#define MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE               -0x7080
/** Bad input parameters to function. */
#define MBEDTLS_ERR_SSL_BAD_INPUT_DATA                    -0x7100
/** Verification of the message MAC failed. */
#define MBEDTLS_ERR_SSL_INVALID_MAC                       -0x7180
/** An invalid SSL record was received. */
#define MBEDTLS_ERR_SSL_INVALID_RECORD                    -0x7200
/** The connection indicated an EOF. */
#define MBEDTLS_ERR_SSL_CONN_EOF                          -0x7280
/** An unknown cipher was received. */
#define MBEDTLS_ERR_SSL_UNKNOWN_CIPHER                    -0x7300
/** The server has no ciphersuites in common with the client. */
#define MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN                  -0x7380
/** No RNG was provided to the SSL module. */
#define MBEDTLS_ERR_SSL_NO_RNG                            -0x7400
/** No client certification received from the client, but required by the authentication mode. */
#define MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE             -0x7480
/** Our own certificate(s) is/are too large to send in an SSL message. */
#define MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE             -0x7500
/** The own certificate is not set, but needed by the server. */
#define MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED              -0x7580
/** The own private key or pre-shared key is not set, but needed. */
#define MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED              -0x7600
/** No CA Chain is set, but required to operate. */
#define MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED                 -0x7680
/** An unexpected message was received from our peer. */
#define MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE                -0x7700
/** A fatal alert message was received from our peer. */
#define MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE               -0x7780
/** Verification of our peer failed. */
#define MBEDTLS_ERR_SSL_PEER_VERIFY_FAILED                -0x7800
/** The peer notified us that the connection is going to be closed. */
#define MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY                 -0x7880
/** Processing of the ClientHello handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO               -0x7900
/** Processing of the ServerHello handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO               -0x7980
/** Processing of the Certificate handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE                -0x7A00
/** Processing of the CertificateRequest handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST        -0x7A80
/** Processing of the ServerKeyExchange handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE        -0x7B00
/** Processing of the ServerHelloDone handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE          -0x7B80
/** Processing of the ClientKeyExchange handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE        -0x7C00
/** Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Read Public. */
#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP     -0x7C80
/** Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Calculate Secret. */
#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS     -0x7D00
/** Processing of the CertificateVerify handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY         -0x7D80
/** Processing of the ChangeCipherSpec handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC         -0x7E00
/** Processing of the Finished handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_FINISHED                   -0x7E80
/** Memory allocation failed */
#define MBEDTLS_ERR_SSL_ALLOC_FAILED                      -0x7F00
/** Hardware acceleration function returned with error */
#define MBEDTLS_ERR_SSL_HW_ACCEL_FAILED                   -0x7F80
/** Hardware acceleration function skipped / left alone data */
#define MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH              -0x6F80
/** Processing of the compression / decompression failed */
#define MBEDTLS_ERR_SSL_COMPRESSION_FAILED                -0x6F00
/** Handshake protocol not within min/max boundaries */
#define MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION           -0x6E80
/** Processing of the NewSessionTicket handshake message failed. */
#define MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET         -0x6E00
/** Session ticket has expired. */
#define MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED            -0x6D80
/** Public key type mismatch (eg, asked for RSA key exchange and presented EC key) */
#define MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH                  -0x6D00
/** Unknown identity received (eg, PSK identity) */
#define MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY                  -0x6C80
/** Internal error (eg, unexpected failure in lower-level module) */
#define MBEDTLS_ERR_SSL_INTERNAL_ERROR                    -0x6C00
/** A counter would wrap (eg, too many messages exchanged). */
#define MBEDTLS_ERR_SSL_COUNTER_WRAPPING                  -0x6B80
/** Unexpected message at ServerHello in renegotiation. */
#define MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO       -0x6B00
/** DTLS client must retry for hello verification */
#define MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED             -0x6A80
/** A buffer is too small to receive or write a message */
#define MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL                  -0x6A00
/** None of the common ciphersuites is usable (eg, no suitable certificate, see debug messages). */
#define MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE             -0x6980
/** No data of requested type currently available on underlying transport. */
#define MBEDTLS_ERR_SSL_WANT_READ                         -0x6900
/** Connection requires a write call. */
#define MBEDTLS_ERR_SSL_WANT_WRITE                        -0x6880
/** The operation timed out. */
#define MBEDTLS_ERR_SSL_TIMEOUT                           -0x6800
/** The client initiated a reconnect from the same port. */
#define MBEDTLS_ERR_SSL_CLIENT_RECONNECT                  -0x6780
/** Record header looks valid but is not expected. */
#define MBEDTLS_ERR_SSL_UNEXPECTED_RECORD                 -0x6700
/** The alert message received indicates a non-fatal error. */
#define MBEDTLS_ERR_SSL_NON_FATAL                         -0x6680
/** Couldn't set the hash for verifying CertificateVerify */
#define MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH               -0x6600
/** Internal-only message signaling that further message-processing should be done */
#define MBEDTLS_ERR_SSL_CONTINUE_PROCESSING               -0x6580
/** The asynchronous operation is not completed yet. */
#define MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS                 -0x6500
/** Internal-only message signaling that a message arrived early. */
#define MBEDTLS_ERR_SSL_EARLY_MESSAGE                     -0x6480
/** An encrypted DTLS-frame with an unexpected CID was received. */
#define MBEDTLS_ERR_SSL_UNEXPECTED_CID                    -0x6000
/** An operation failed due to an unexpected version or configuration. */
#define MBEDTLS_ERR_SSL_VERSION_MISMATCH                  -0x5F00
/** A cryptographic operation is in progress. Try again later. */
#define MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS                -0x7000
/** Invalid value in SSL config */
#define MBEDTLS_ERR_SSL_BAD_CONFIG                        -0x5E80

/*
 * Various constants
 */
#define MBEDTLS_SSL_MAJOR_VERSION_3             3
#define MBEDTLS_SSL_MINOR_VERSION_0             0   /*!< SSL v3.0 */
#define MBEDTLS_SSL_MINOR_VERSION_1             1   /*!< TLS v1.0 */
#define MBEDTLS_SSL_MINOR_VERSION_2             2   /*!< TLS v1.1 */
#define MBEDTLS_SSL_MINOR_VERSION_3             3   /*!< TLS v1.2 */
#define MBEDTLS_SSL_MINOR_VERSION_4             4   /*!< TLS v1.3 (experimental) */

#define MBEDTLS_SSL_TRANSPORT_STREAM            0   /*!< TLS      */
#define MBEDTLS_SSL_TRANSPORT_DATAGRAM          1   /*!< DTLS     */

#define MBEDTLS_SSL_MAX_HOST_NAME_LEN           255 /*!< Maximum host name defined in RFC 1035 */
#define MBEDTLS_SSL_MAX_ALPN_NAME_LEN           255 /*!< Maximum size in bytes of a protocol name in alpn ext., RFC 7301 */

#define MBEDTLS_SSL_MAX_ALPN_LIST_LEN           65535 /*!< Maximum size in bytes of list in alpn ext., RFC 7301          */

/* RFC 6066 section 4, see also mfl_code_to_length in ssl_tls.c
 * NONE must be zero so that memset()ing structure to zero works */
#define MBEDTLS_SSL_MAX_FRAG_LEN_NONE           0   /*!< don't use this extension   */
#define MBEDTLS_SSL_MAX_FRAG_LEN_512            1   /*!< MaxFragmentLength 2^9      */
#define MBEDTLS_SSL_MAX_FRAG_LEN_1024           2   /*!< MaxFragmentLength 2^10     */
#define MBEDTLS_SSL_MAX_FRAG_LEN_2048           3   /*!< MaxFragmentLength 2^11     */
#define MBEDTLS_SSL_MAX_FRAG_LEN_4096           4   /*!< MaxFragmentLength 2^12     */
#define MBEDTLS_SSL_MAX_FRAG_LEN_INVALID        5   /*!< first invalid value        */

#define MBEDTLS_SSL_IS_CLIENT                   0
#define MBEDTLS_SSL_IS_SERVER                   1

#define MBEDTLS_SSL_IS_NOT_FALLBACK             0
#define MBEDTLS_SSL_IS_FALLBACK                 1

#define MBEDTLS_SSL_EXTENDED_MS_DISABLED        0
#define MBEDTLS_SSL_EXTENDED_MS_ENABLED         1

#define MBEDTLS_SSL_CID_DISABLED                0
#define MBEDTLS_SSL_CID_ENABLED                 1

#define MBEDTLS_SSL_ETM_DISABLED                0
#define MBEDTLS_SSL_ETM_ENABLED                 1

#define MBEDTLS_SSL_COMPRESS_NULL               0
#define MBEDTLS_SSL_COMPRESS_DEFLATE            1

#define MBEDTLS_SSL_VERIFY_NONE                 0
#define MBEDTLS_SSL_VERIFY_OPTIONAL             1
#define MBEDTLS_SSL_VERIFY_REQUIRED             2
#define MBEDTLS_SSL_VERIFY_UNSET                3 /* Used only for sni_authmode */

#define MBEDTLS_SSL_LEGACY_RENEGOTIATION        0
#define MBEDTLS_SSL_SECURE_RENEGOTIATION        1

#define MBEDTLS_SSL_RENEGOTIATION_DISABLED      0
#define MBEDTLS_SSL_RENEGOTIATION_ENABLED       1

#define MBEDTLS_SSL_ANTI_REPLAY_DISABLED        0
#define MBEDTLS_SSL_ANTI_REPLAY_ENABLED         1

#define MBEDTLS_SSL_RENEGOTIATION_NOT_ENFORCED  -1
#define MBEDTLS_SSL_RENEGO_MAX_RECORDS_DEFAULT  16

#define MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION     0
#define MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION  1
#define MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE      2

#define MBEDTLS_SSL_TRUNC_HMAC_DISABLED         0
#define MBEDTLS_SSL_TRUNC_HMAC_ENABLED          1
#define MBEDTLS_SSL_TRUNCATED_HMAC_LEN          10  /* 80 bits, rfc 6066 section 7 */

#define MBEDTLS_SSL_SESSION_TICKETS_DISABLED     0
#define MBEDTLS_SSL_SESSION_TICKETS_ENABLED      1

#define MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED    0
#define MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED     1

#define MBEDTLS_SSL_ARC4_ENABLED                0
#define MBEDTLS_SSL_ARC4_DISABLED               1

#define MBEDTLS_SSL_PRESET_DEFAULT              0
#define MBEDTLS_SSL_PRESET_SUITEB               2

#define MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED       1
#define MBEDTLS_SSL_CERT_REQ_CA_LIST_DISABLED      0

#define MBEDTLS_SSL_DTLS_SRTP_MKI_UNSUPPORTED    0
#define MBEDTLS_SSL_DTLS_SRTP_MKI_SUPPORTED      1

/*
 * Default range for DTLS retransmission timer value, in milliseconds.
 * RFC 6347 4.2.4.1 says from 1 second to 60 seconds.
 */
#define MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN    1000
#define MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MAX   60000

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */

#if !defined(MBEDTLS_SSL_DEFAULT_TICKET_LIFETIME)
#define MBEDTLS_SSL_DEFAULT_TICKET_LIFETIME     86400 /**< Lifetime of session tickets (if enabled) */
#endif

/*
 * Maximum fragment length in bytes,
 * determines the size of each of the two internal I/O buffers.
 *
 * Note: the RFC defines the default size of SSL / TLS messages. If you
 * change the value here, other clients / servers may not be able to
 * communicate with you anymore. Only change this value if you control
 * both sides of the connection and have it reduced at both sides, or
 * if you're using the Max Fragment Length extension and you know all your
 * peers are using it too!
 */
#if !defined(MBEDTLS_SSL_MAX_CONTENT_LEN)
#define MBEDTLS_SSL_MAX_CONTENT_LEN         16384   /**< Size of the input / output buffer */
#endif

#if !defined(MBEDTLS_SSL_IN_CONTENT_LEN)
#define MBEDTLS_SSL_IN_CONTENT_LEN MBEDTLS_SSL_MAX_CONTENT_LEN
#endif

#if !defined(MBEDTLS_SSL_OUT_CONTENT_LEN)
#define MBEDTLS_SSL_OUT_CONTENT_LEN MBEDTLS_SSL_MAX_CONTENT_LEN
#endif

/*
 * Maximum number of heap-allocated bytes for the purpose of
 * DTLS handshake message reassembly and future message buffering.
 */
#if !defined(MBEDTLS_SSL_DTLS_MAX_BUFFERING)
#define MBEDTLS_SSL_DTLS_MAX_BUFFERING 32768
#endif

/*
 * Maximum length of CIDs for incoming and outgoing messages.
 */
#if !defined(MBEDTLS_SSL_CID_IN_LEN_MAX)
#define MBEDTLS_SSL_CID_IN_LEN_MAX          32
#endif

#if !defined(MBEDTLS_SSL_CID_OUT_LEN_MAX)
#define MBEDTLS_SSL_CID_OUT_LEN_MAX         32
#endif

#if !defined(MBEDTLS_SSL_CID_PADDING_GRANULARITY)
#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16
#endif

#if !defined(MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY)
#define MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY 1
#endif

/* \} name SECTION: Module settings */

/*
 * Length of the verify data for secure renegotiation
 */
#if defined(MBEDTLS_SSL_PROTO_SSL3)
#define MBEDTLS_SSL_VERIFY_DATA_MAX_LEN 36
#else
#define MBEDTLS_SSL_VERIFY_DATA_MAX_LEN 12
#endif

/*
 * Signaling ciphersuite values (SCSV)
 */
#define MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO    0xFF   /**< renegotiation info ext */
#define MBEDTLS_SSL_FALLBACK_SCSV_VALUE         0x5600 /**< RFC 7507 section 2 */

/*
 * Supported Signature and Hash algorithms (For TLS 1.2)
 * RFC 5246 section 7.4.1.4.1
 */
#define MBEDTLS_SSL_HASH_NONE                0
#define MBEDTLS_SSL_HASH_MD5                 1
#define MBEDTLS_SSL_HASH_SHA1                2
#define MBEDTLS_SSL_HASH_SHA224              3
#define MBEDTLS_SSL_HASH_SHA256              4
#define MBEDTLS_SSL_HASH_SHA384              5
#define MBEDTLS_SSL_HASH_SHA512              6

#define MBEDTLS_SSL_SIG_ANON                 0
#define MBEDTLS_SSL_SIG_RSA                  1
#define MBEDTLS_SSL_SIG_ECDSA                3

/*
 * Client Certificate Types
 * RFC 5246 section 7.4.4 plus RFC 4492 section 5.5
 */
#define MBEDTLS_SSL_CERT_TYPE_RSA_SIGN       1
#define MBEDTLS_SSL_CERT_TYPE_ECDSA_SIGN    64

/*
 * Message, alert and handshake types
 */
#define MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC     20
#define MBEDTLS_SSL_MSG_ALERT                  21
#define MBEDTLS_SSL_MSG_HANDSHAKE              22
#define MBEDTLS_SSL_MSG_APPLICATION_DATA       23
#define MBEDTLS_SSL_MSG_CID                    25

#define MBEDTLS_SSL_ALERT_LEVEL_WARNING         1
#define MBEDTLS_SSL_ALERT_LEVEL_FATAL           2

#define MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY           0  /* 0x00 */
#define MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE    10  /* 0x0A */
#define MBEDTLS_SSL_ALERT_MSG_BAD_RECORD_MAC        20  /* 0x14 */
#define MBEDTLS_SSL_ALERT_MSG_DECRYPTION_FAILED     21  /* 0x15 */
#define MBEDTLS_SSL_ALERT_MSG_RECORD_OVERFLOW       22  /* 0x16 */
#define MBEDTLS_SSL_ALERT_MSG_DECOMPRESSION_FAILURE 30  /* 0x1E */
#define MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE     40  /* 0x28 */
#define MBEDTLS_SSL_ALERT_MSG_NO_CERT               41  /* 0x29 */
#define MBEDTLS_SSL_ALERT_MSG_BAD_CERT              42  /* 0x2A */
#define MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT      43  /* 0x2B */
#define MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED          44  /* 0x2C */
#define MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED          45  /* 0x2D */
#define MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN          46  /* 0x2E */
#define MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER     47  /* 0x2F */
#define MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA            48  /* 0x30 */
#define MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED         49  /* 0x31 */
#define MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR          50  /* 0x32 */
#define MBEDTLS_SSL_ALERT_MSG_DECRYPT_ERROR         51  /* 0x33 */
#define MBEDTLS_SSL_ALERT_MSG_EXPORT_RESTRICTION    60  /* 0x3C */
#define MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION      70  /* 0x46 */
#define MBEDTLS_SSL_ALERT_MSG_INSUFFICIENT_SECURITY 71  /* 0x47 */
#define MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR        80  /* 0x50 */
#define MBEDTLS_SSL_ALERT_MSG_INAPROPRIATE_FALLBACK 86  /* 0x56 */
#define MBEDTLS_SSL_ALERT_MSG_USER_CANCELED         90  /* 0x5A */
#define MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION     100  /* 0x64 */
#define MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT      110  /* 0x6E */
#define MBEDTLS_SSL_ALERT_MSG_UNRECOGNIZED_NAME    112  /* 0x70 */
#define MBEDTLS_SSL_ALERT_MSG_UNKNOWN_PSK_IDENTITY 115  /* 0x73 */
#define MBEDTLS_SSL_ALERT_MSG_NO_APPLICATION_PROTOCOL 120 /* 0x78 */

#define MBEDTLS_SSL_HS_HELLO_REQUEST            0
#define MBEDTLS_SSL_HS_CLIENT_HELLO             1
#define MBEDTLS_SSL_HS_SERVER_HELLO             2
#define MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST     3
#define MBEDTLS_SSL_HS_NEW_SESSION_TICKET       4
#define MBEDTLS_SSL_HS_CERTIFICATE             11
#define MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE     12
#define MBEDTLS_SSL_HS_CERTIFICATE_REQUEST     13
#define MBEDTLS_SSL_HS_SERVER_HELLO_DONE       14
#define MBEDTLS_SSL_HS_CERTIFICATE_VERIFY      15
#define MBEDTLS_SSL_HS_CLIENT_KEY_EXCHANGE     16
#define MBEDTLS_SSL_HS_FINISHED                20

/*
 * TLS extensions
 */
#define MBEDTLS_TLS_EXT_SERVERNAME                   0
#define MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME          0

#define MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH          1

#define MBEDTLS_TLS_EXT_TRUNCATED_HMAC               4

#define MBEDTLS_TLS_EXT_SUPPORTED_ELLIPTIC_CURVES   10
#define MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS     11

#define MBEDTLS_TLS_EXT_SIG_ALG                     13

#define MBEDTLS_TLS_EXT_USE_SRTP                    14

#define MBEDTLS_TLS_EXT_ALPN                        16

#define MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC            22 /* 0x16 */
#define MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET  0x0017 /* 23 */

#define MBEDTLS_TLS_EXT_SESSION_TICKET              35

/* The value of the CID extension is still TBD as of
 * draft-ietf-tls-dtls-connection-id-05
 * (https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05).
 *
 * A future minor revision of Mbed TLS may change the default value of
 * this option to match evolving standards and usage.
 */
#if !defined(MBEDTLS_TLS_EXT_CID)
#define MBEDTLS_TLS_EXT_CID                        254 /* TBD */
#endif

#define MBEDTLS_TLS_EXT_ECJPAKE_KKPP               256 /* experimental */

#define MBEDTLS_TLS_EXT_RENEGOTIATION_INFO      0xFF01

/*
 * Size defines
 */
#if !defined(MBEDTLS_PSK_MAX_LEN)
#define MBEDTLS_PSK_MAX_LEN            32 /* 256 bits */
#endif

/* Dummy type used only for its size */
union mbedtls_ssl_premaster_secret
{
#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
    unsigned char _pms_rsa[48];                         /* RFC 5246 8.1.1 */
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)
    unsigned char _pms_dhm[MBEDTLS_MPI_MAX_SIZE];      /* RFC 5246 8.1.2 */
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)    || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)  || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED)     || \
    defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
    unsigned char _pms_ecdh[MBEDTLS_ECP_MAX_BYTES];    /* RFC 4492 5.10 */
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
    unsigned char _pms_psk[4 + 2 * MBEDTLS_PSK_MAX_LEN];       /* RFC 4279 2 */
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
    unsigned char _pms_dhe_psk[4 + MBEDTLS_MPI_MAX_SIZE
                                 + MBEDTLS_PSK_MAX_LEN];       /* RFC 4279 3 */
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
    unsigned char _pms_rsa_psk[52 + MBEDTLS_PSK_MAX_LEN];      /* RFC 4279 4 */
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
    unsigned char _pms_ecdhe_psk[4 + MBEDTLS_ECP_MAX_BYTES
                                   + MBEDTLS_PSK_MAX_LEN];     /* RFC 5489 2 */
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
    unsigned char _pms_ecjpake[32];     /* Thread spec: SHA-256 output */
#endif
};

#define MBEDTLS_PREMASTER_SIZE     sizeof( union mbedtls_ssl_premaster_secret )

#ifdef __cplusplus
extern "C" {
#endif

/*
 * SSL state machine
 */
typedef enum
{
    MBEDTLS_SSL_HELLO_REQUEST,
    MBEDTLS_SSL_CLIENT_HELLO,
    MBEDTLS_SSL_SERVER_HELLO,
    MBEDTLS_SSL_SERVER_CERTIFICATE,
    MBEDTLS_SSL_SERVER_KEY_EXCHANGE,
    MBEDTLS_SSL_CERTIFICATE_REQUEST,
    MBEDTLS_SSL_SERVER_HELLO_DONE,
    MBEDTLS_SSL_CLIENT_CERTIFICATE,
    MBEDTLS_SSL_CLIENT_KEY_EXCHANGE,
    MBEDTLS_SSL_CERTIFICATE_VERIFY,
    MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC,
    MBEDTLS_SSL_CLIENT_FINISHED,
    MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC,
    MBEDTLS_SSL_SERVER_FINISHED,
    MBEDTLS_SSL_FLUSH_BUFFERS,
    MBEDTLS_SSL_HANDSHAKE_WRAPUP,
    MBEDTLS_SSL_HANDSHAKE_OVER,
    MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET,
    MBEDTLS_SSL_SERVER_HELLO_VERIFY_REQUEST_SENT,
}
mbedtls_ssl_states;

/*
 * The tls_prf function types.
 */
typedef enum
{
   MBEDTLS_SSL_TLS_PRF_NONE,
   MBEDTLS_SSL_TLS_PRF_SSL3,
   MBEDTLS_SSL_TLS_PRF_TLS1,
   MBEDTLS_SSL_TLS_PRF_SHA384,
   MBEDTLS_SSL_TLS_PRF_SHA256
}
mbedtls_tls_prf_types;
/**
 * \brief          Callback type: send data on the network.
 *
 * \note           That callback may be either blocking or non-blocking.
 *
 * \param ctx      Context for the send callback (typically a file descriptor)
 * \param buf      Buffer holding the data to send
 * \param len      Length of the data to send
 *
 * \return         The callback must return the number of bytes sent if any,
 *                 or a non-zero error code.
 *                 If performing non-blocking I/O, \c MBEDTLS_ERR_SSL_WANT_WRITE
 *                 must be returned when the operation would block.
 *
 * \note           The callback is allowed to send fewer bytes than requested.
 *                 It must always return the number of bytes actually sent.
 */
typedef int mbedtls_ssl_send_t( void *ctx,
                                const unsigned char *buf,
                                size_t len );

/**
 * \brief          Callback type: receive data from the network.
 *
 * \note           That callback may be either blocking or non-blocking.
 *
 * \param ctx      Context for the receive callback (typically a file
 *                 descriptor)
 * \param buf      Buffer to write the received data to
 * \param len      Length of the receive buffer
 *
 * \returns        If data has been received, the positive number of bytes received.
 * \returns        \c 0 if the connection has been closed.
 * \returns        If performing non-blocking I/O, \c MBEDTLS_ERR_SSL_WANT_READ
 *                 must be returned when the operation would block.
 * \returns        Another negative error code on other kinds of failures.
 *
 * \note           The callback may receive fewer bytes than the length of the
 *                 buffer. It must always return the number of bytes actually
 *                 received and written to the buffer.
 */
typedef int mbedtls_ssl_recv_t( void *ctx,
                                unsigned char *buf,
                                size_t len );

/**
 * \brief          Callback type: receive data from the network, with timeout
 *
 * \note           That callback must block until data is received, or the
 *                 timeout delay expires, or the operation is interrupted by a
 *                 signal.
 *
 * \param ctx      Context for the receive callback (typically a file descriptor)
 * \param buf      Buffer to write the received data to
 * \param len      Length of the receive buffer
 * \param timeout  Maximum nomber of millisecondes to wait for data
 *                 0 means no timeout (potentially waiting forever)
 *
 * \return         The callback must return the number of bytes received,
 *                 or a non-zero error code:
 *                 \c MBEDTLS_ERR_SSL_TIMEOUT if the operation timed out,
 *                 \c MBEDTLS_ERR_SSL_WANT_READ if interrupted by a signal.
 *
 * \note           The callback may receive fewer bytes than the length of the
 *                 buffer. It must always return the number of bytes actually
 *                 received and written to the buffer.
 */
typedef int mbedtls_ssl_recv_timeout_t( void *ctx,
                                        unsigned char *buf,
                                        size_t len,
                                        uint32_t timeout );
/**
 * \brief          Callback type: set a pair of timers/delays to watch
 *
 * \param ctx      Context pointer
 * \param int_ms   Intermediate delay in milliseconds
 * \param fin_ms   Final delay in milliseconds
 *                 0 cancels the current timer.
 *
 * \note           This callback must at least store the necessary information
 *                 for the associated \c mbedtls_ssl_get_timer_t callback to
 *                 return correct information.
 *
 * \note           If using a event-driven style of programming, an event must
 *                 be generated when the final delay is passed. The event must
 *                 cause a call to \c mbedtls_ssl_handshake() with the proper
 *                 SSL context to be scheduled. Care must be taken to ensure
 *                 that at most one such call happens at a time.
 *
 * \note           Only one timer at a time must be running. Calling this
 *                 function while a timer is running must cancel it. Cancelled
 *                 timers must not generate any event.
 */
typedef void mbedtls_ssl_set_timer_t( void * ctx,
                                      uint32_t int_ms,
                                      uint32_t fin_ms );

/**
 * \brief          Callback type: get status of timers/delays
 *
 * \param ctx      Context pointer
 *
 * \return         This callback must return:
 *                 -1 if cancelled (fin_ms == 0),
 *                  0 if none of the delays have passed,
 *                  1 if only the intermediate delay has passed,
 *                  2 if the final delay has passed.
 */
typedef int mbedtls_ssl_get_timer_t( void * ctx );

/* Defined below */
typedef struct mbedtls_ssl_session mbedtls_ssl_session;
typedef struct mbedtls_ssl_context mbedtls_ssl_context;
typedef struct mbedtls_ssl_config  mbedtls_ssl_config;

/* Defined in ssl_internal.h */
typedef struct mbedtls_ssl_transform mbedtls_ssl_transform;
typedef struct mbedtls_ssl_handshake_params mbedtls_ssl_handshake_params;
typedef struct mbedtls_ssl_sig_hash_set_t mbedtls_ssl_sig_hash_set_t;
#if defined(MBEDTLS_X509_CRT_PARSE_C)
typedef struct mbedtls_ssl_key_cert mbedtls_ssl_key_cert;
#endif
#if defined(MBEDTLS_SSL_PROTO_DTLS)
typedef struct mbedtls_ssl_flight_item mbedtls_ssl_flight_item;
#endif

#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
#if defined(MBEDTLS_X509_CRT_PARSE_C)
/**
 * \brief           Callback type: start external signature operation.
 *
 *                  This callback is called during an SSL handshake to start
 *                  a signature decryption operation using an
 *                  external processor. The parameter \p cert contains
 *                  the public key; it is up to the callback function to
 *                  determine how to access the associated private key.
 *
 *                  This function typically sends or enqueues a request, and
 *                  does not wait for the operation to complete. This allows
 *                  the handshake step to be non-blocking.
 *
 *                  The parameters \p ssl and \p cert are guaranteed to remain
 *                  valid throughout the handshake. On the other hand, this
 *                  function must save the contents of \p hash if the value
 *                  is needed for later processing, because the \p hash buffer
 *                  is no longer valid after this function returns.
 *
 *                  This function may call mbedtls_ssl_set_async_operation_data()
 *                  to store an operation context for later retrieval
 *                  by the resume or cancel callback.
 *
 * \note            For RSA signatures, this function must produce output
 *                  that is consistent with PKCS#1 v1.5 in the same way as
 *                  mbedtls_rsa_pkcs1_sign(). Before the private key operation,
 *                  apply the padding steps described in RFC 8017, section 9.2
 *                  "EMSA-PKCS1-v1_5" as follows.
 *                  - If \p md_alg is #MBEDTLS_MD_NONE, apply the PKCS#1 v1.5
 *                    encoding, treating \p hash as the DigestInfo to be
 *                    padded. In other words, apply EMSA-PKCS1-v1_5 starting
 *                    from step 3, with `T = hash` and `tLen = hash_len`.
 *                  - If `md_alg != MBEDTLS_MD_NONE`, apply the PKCS#1 v1.5
 *                    encoding, treating \p hash as the hash to be encoded and
 *                    padded. In other words, apply EMSA-PKCS1-v1_5 starting
 *                    from step 2, with `digestAlgorithm` obtained by calling
 *                    mbedtls_oid_get_oid_by_md() on \p md_alg.
 *
 * \note            For ECDSA signatures, the output format is the DER encoding
 *                  `Ecdsa-Sig-Value` defined in
 *                  [RFC 4492 section 5.4](https://tools.ietf.org/html/rfc4492#section-5.4).
 *
 * \param ssl             The SSL connection instance. It should not be
 *                        modified other than via
 *                        mbedtls_ssl_set_async_operation_data().
 * \param cert            Certificate containing the public key.
 *                        In simple cases, this is one of the pointers passed to
 *                        mbedtls_ssl_conf_own_cert() when configuring the SSL
 *                        connection. However, if other callbacks are used, this
 *                        property may not hold. For example, if an SNI callback
 *                        is registered with mbedtls_ssl_conf_sni(), then
 *                        this callback determines what certificate is used.
 * \param md_alg          Hash algorithm.
 * \param hash            Buffer containing the hash. This buffer is
 *                        no longer valid when the function returns.
 * \param hash_len        Size of the \c hash buffer in bytes.
 *
 * \return          0 if the operation was started successfully and the SSL
 *                  stack should call the resume callback immediately.
 * \return          #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS if the operation
 *                  was started successfully and the SSL stack should return
 *                  immediately without calling the resume callback yet.
 * \return          #MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH if the external
 *                  processor does not support this key. The SSL stack will
 *                  use the private key object instead.
 * \return          Any other error indicates a fatal failure and is
 *                  propagated up the call chain. The callback should
 *                  use \c MBEDTLS_ERR_PK_xxx error codes, and <b>must not</b>
 *                  use \c MBEDTLS_ERR_SSL_xxx error codes except as
 *                  directed in the documentation of this callback.
 */
typedef int mbedtls_ssl_async_sign_t( mbedtls_ssl_context *ssl,
                                      mbedtls_x509_crt *cert,
                                      mbedtls_md_type_t md_alg,
                                      const unsigned char *hash,
                                      size_t hash_len );

/**
 * \brief           Callback type: start external decryption operation.
 *
 *                  This callback is called during an SSL handshake to start
 *                  an RSA decryption operation using an
 *                  external processor. The parameter \p cert contains
 *                  the public key; it is up to the callback function to
 *                  determine how to access the associated private key.
 *
 *                  This function typically sends or enqueues a request, and
 *                  does not wait for the operation to complete. This allows
 *                  the handshake step to be non-blocking.
 *
 *                  The parameters \p ssl and \p cert are guaranteed to remain
 *                  valid throughout the handshake. On the other hand, this
 *                  function must save the contents of \p input if the value
 *                  is needed for later processing, because the \p input buffer
 *                  is no longer valid after this function returns.
 *
 *                  This function may call mbedtls_ssl_set_async_operation_data()
 *                  to store an operation context for later retrieval
 *                  by the resume or cancel callback.
 *
 * \warning         RSA decryption as used in TLS is subject to a potential
 *                  timing side channel attack first discovered by Bleichenbacher
 *                  in 1998. This attack can be remotely exploitable
 *                  in practice. To avoid this attack, you must ensure that
 *                  if the callback performs an RSA decryption, the time it
 *                  takes to execute and return the result does not depend
 *                  on whether the RSA decryption succeeded or reported
 *                  invalid padding.
 *
 * \param ssl             The SSL connection instance. It should not be
 *                        modified other than via
 *                        mbedtls_ssl_set_async_operation_data().
 * \param cert            Certificate containing the public key.
 *                        In simple cases, this is one of the pointers passed to
 *                        mbedtls_ssl_conf_own_cert() when configuring the SSL
 *                        connection. However, if other callbacks are used, this
 *                        property may not hold. For example, if an SNI callback
 *                        is registered with mbedtls_ssl_conf_sni(), then
 *                        this callback determines what certificate is used.
 * \param input           Buffer containing the input ciphertext. This buffer
 *                        is no longer valid when the function returns.
 * \param input_len       Size of the \p input buffer in bytes.
 *
 * \return          0 if the operation was started successfully and the SSL
 *                  stack should call the resume callback immediately.
 * \return          #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS if the operation
 *                  was started successfully and the SSL stack should return
 *                  immediately without calling the resume callback yet.
 * \return          #MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH if the external
 *                  processor does not support this key. The SSL stack will
 *                  use the private key object instead.
 * \return          Any other error indicates a fatal failure and is
 *                  propagated up the call chain. The callback should
 *                  use \c MBEDTLS_ERR_PK_xxx error codes, and <b>must not</b>
 *                  use \c MBEDTLS_ERR_SSL_xxx error codes except as
 *                  directed in the documentation of this callback.
 */
typedef int mbedtls_ssl_async_decrypt_t( mbedtls_ssl_context *ssl,
                                         mbedtls_x509_crt *cert,
                                         const unsigned char *input,
                                         size_t input_len );
#endif /* MBEDTLS_X509_CRT_PARSE_C */

/**
 * \brief           Callback type: resume external operation.
 *
 *                  This callback is called during an SSL handshake to resume
 *                  an external operation started by the
 *                  ::mbedtls_ssl_async_sign_t or
 *                  ::mbedtls_ssl_async_decrypt_t callback.
 *
 *                  This function typically checks the status of a pending
 *                  request or causes the request queue to make progress, and
 *                  does not wait for the operation to complete. This allows
 *                  the handshake step to be non-blocking.
 *
 *                  This function may call mbedtls_ssl_get_async_operation_data()
 *                  to retrieve an operation context set by the start callback.
 *                  It may call mbedtls_ssl_set_async_operation_data() to modify
 *                  this context.
 *
 *                  Note that when this function returns a status other than
 *                  #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS, it must free any
 *                  resources associated with the operation.
 *
 * \param ssl             The SSL connection instance. It should not be
 *                        modified other than via
 *                        mbedtls_ssl_set_async_operation_data().
 * \param output          Buffer containing the output (signature or decrypted
 *                        data) on success.
 * \param output_len      On success, number of bytes written to \p output.
 * \param output_size     Size of the \p output buffer in bytes.
 *
 * \return          0 if output of the operation is available in the
 *                  \p output buffer.
 * \return          #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS if the operation
 *                  is still in progress. Subsequent requests for progress
 *                  on the SSL connection will call the resume callback
 *                  again.
 * \return          Any other error means that the operation is aborted.
 *                  The SSL handshake is aborted. The callback should
 *                  use \c MBEDTLS_ERR_PK_xxx error codes, and <b>must not</b>
 *                  use \c MBEDTLS_ERR_SSL_xxx error codes except as
 *                  directed in the documentation of this callback.
 */
typedef int mbedtls_ssl_async_resume_t( mbedtls_ssl_context *ssl,
                                        unsigned char *output,
                                        size_t *output_len,
                                        size_t output_size );

/**
 * \brief           Callback type: cancel external operation.
 *
 *                  This callback is called if an SSL connection is closed
 *                  while an asynchronous operation is in progress. Note that
 *                  this callback is not called if the
 *                  ::mbedtls_ssl_async_resume_t callback has run and has
 *                  returned a value other than
 *                  #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS, since in that case
 *                  the asynchronous operation has already completed.
 *
 *                  This function may call mbedtls_ssl_get_async_operation_data()
 *                  to retrieve an operation context set by the start callback.
 *
 * \param ssl             The SSL connection instance. It should not be
 *                        modified.
 */
typedef void mbedtls_ssl_async_cancel_t( mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */

#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) &&        \
    !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
#define MBEDTLS_SSL_PEER_CERT_DIGEST_MAX_LEN  48
#if defined(MBEDTLS_SHA256_C)
#define MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE MBEDTLS_MD_SHA256
#define MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN  32
#elif defined(MBEDTLS_SHA512_C)
#define MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE MBEDTLS_MD_SHA384
#define MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN  48
#elif defined(MBEDTLS_SHA1_C)
#define MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE MBEDTLS_MD_SHA1
#define MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN  20
#else
/* This is already checked in check_config.h, but be sure. */
#error "Bad configuration - need SHA-1, SHA-256 or SHA-512 enabled to compute digest of peer CRT."
#endif
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED &&
          !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */

#if defined(MBEDTLS_SSL_DTLS_SRTP)

#define MBEDTLS_TLS_SRTP_MAX_MKI_LENGTH             255
#define MBEDTLS_TLS_SRTP_MAX_PROFILE_LIST_LENGTH    4
/*
 * For code readability use a typedef for DTLS-SRTP profiles
 *
 * Use_srtp extension protection profiles values as defined in
 * http://www.iana.org/assignments/srtp-protection/srtp-protection.xhtml
 *
 * Reminder: if this list is expanded mbedtls_ssl_check_srtp_profile_value
 * must be updated too.
 */
#define MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_80     ( (uint16_t) 0x0001)
#define MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_32     ( (uint16_t) 0x0002)
#define MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_80          ( (uint16_t) 0x0005)
#define MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_32          ( (uint16_t) 0x0006)
/* This one is not iana defined, but for code readability. */
#define MBEDTLS_TLS_SRTP_UNSET                      ( (uint16_t) 0x0000)

typedef uint16_t mbedtls_ssl_srtp_profile;

typedef struct mbedtls_dtls_srtp_info_t
{
    /*! The SRTP profile that was negotiated. */
    mbedtls_ssl_srtp_profile chosen_dtls_srtp_profile;
    /*! The length of mki_value. */
    uint16_t mki_len;
    /*! The mki_value used, with max size of 256 bytes. */
    unsigned char mki_value[MBEDTLS_TLS_SRTP_MAX_MKI_LENGTH];
}
mbedtls_dtls_srtp_info;

#endif /* MBEDTLS_SSL_DTLS_SRTP */

/*
 * This structure is used for storing current session data.
 *
 * Note: when changing this definition, we need to check and update:
 *  - in tests/suites/test_suite_ssl.function:
 *      ssl_populate_session() and ssl_serialize_session_save_load()
 *  - in library/ssl_tls.c:
 *      mbedtls_ssl_session_init() and mbedtls_ssl_session_free()
 *      mbedtls_ssl_session_save() and ssl_session_load()
 *      ssl_session_copy()
 */
struct mbedtls_ssl_session
{
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
    unsigned char mfl_code;     /*!< MaxFragmentLength negotiated by peer */
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */

#if defined(MBEDTLS_HAVE_TIME)
    mbedtls_time_t start;       /*!< starting time      */
#endif
    int ciphersuite;            /*!< chosen ciphersuite */
    int compression;            /*!< chosen compression */
    size_t id_len;              /*!< session id length  */
    unsigned char id[32];       /*!< session identifier */
    unsigned char master[48];   /*!< the master secret  */

#if defined(MBEDTLS_X509_CRT_PARSE_C)
#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
    mbedtls_x509_crt *peer_cert;       /*!< peer X.509 cert chain */
#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
    /*! The digest of the peer's end-CRT. This must be kept to detect CRT
     *  changes during renegotiation, mitigating the triple handshake attack. */
    unsigned char *peer_cert_digest;
    size_t peer_cert_digest_len;
    mbedtls_md_type_t peer_cert_digest_type;
#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
#endif /* MBEDTLS_X509_CRT_PARSE_C */
    uint32_t verify_result;          /*!<  verification result     */

#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
    unsigned char *ticket;      /*!< RFC 5077 session ticket */
    size_t ticket_len;          /*!< session ticket length   */
    uint32_t ticket_lifetime;   /*!< ticket lifetime hint    */
#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */

#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
    int trunc_hmac;             /*!< flag for truncated hmac activation   */
#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */

#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
    int encrypt_then_mac;       /*!< flag for EtM activation                */
#endif
};

/**
 * SSL/TLS configuration to be shared between mbedtls_ssl_context structures.
 */
struct mbedtls_ssl_config
{
    /* Group items by size and reorder them to maximize usage of immediate offset access.    */

    /*
     * Numerical settings (char)
     */

    unsigned char max_major_ver;    /*!< max. major version used            */
    unsigned char max_minor_ver;    /*!< max. minor version used            */
    unsigned char min_major_ver;    /*!< min. major version used            */
    unsigned char min_minor_ver;    /*!< min. minor version used            */

    /*
     * Flags (could be bit-fields to save RAM, but separate bytes make
     * the code smaller on architectures with an instruction for direct
     * byte access).
     */

    uint8_t endpoint /*bool*/;      /*!< 0: client, 1: server               */
    uint8_t transport /*bool*/;     /*!< stream (TLS) or datagram (DTLS)    */
    uint8_t authmode /*2 bits*/;    /*!< MBEDTLS_SSL_VERIFY_XXX             */
    /* needed even with renego disabled for LEGACY_BREAK_HANDSHAKE          */
    uint8_t allow_legacy_renegotiation /*2 bits*/; /*!< MBEDTLS_LEGACY_XXX  */
#if defined(MBEDTLS_ARC4_C)
    uint8_t arc4_disabled /*bool*/; /*!< blacklist RC4 ciphersuites?        */
#endif
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
    uint8_t mfl_code /*3 bits*/;    /*!< desired fragment length            */
#endif
#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
    uint8_t encrypt_then_mac /*bool*/;  /*!< negotiate encrypt-then-mac?    */
#endif
#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
    uint8_t extended_ms /*bool*/;   /*!< negotiate extended master secret?  */
#endif
#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
    uint8_t anti_replay /*bool*/;   /*!< detect and prevent replay?         */
#endif
#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
    uint8_t cbc_record_splitting /*bool*/;  /*!< do cbc record splitting    */
#endif
#if defined(MBEDTLS_SSL_RENEGOTIATION)
    uint8_t disable_renegotiation /*bool*/; /*!< disable renegotiation?     */
#endif
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
    uint8_t trunc_hmac /*bool*/;    /*!< negotiate truncated hmac?          */
#endif
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
    uint8_t session_tickets /*bool*/;   /*!< use session tickets?           */
#endif
#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
    uint8_t fallback /*bool*/;      /*!< is this a fallback?                */
#endif
#if defined(MBEDTLS_SSL_SRV_C)
    uint8_t cert_req_ca_list /*bool*/;  /*!< enable sending CA list in
                                          Certificate Request messages?     */
#endif
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
    uint8_t ignore_unexpected_cid /*bool*/; /*!< Determines whether DTLS
                                             *   record with unexpected CID
                                             *   should lead to failure.    */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
#if defined(MBEDTLS_SSL_DTLS_SRTP)
    uint8_t dtls_srtp_mki_support /*bool*/; /*!< support having mki_value
                                                 in the use_srtp extension? */
#endif

    /*
     * Numerical settings (int or larger)
     */

    uint32_t read_timeout;          /*!< timeout for mbedtls_ssl_read (ms)  */

#if defined(MBEDTLS_SSL_PROTO_DTLS)
    uint32_t hs_timeout_min;        /*!< initial value of the handshake
                                         retransmission timeout (ms)        */
    uint32_t hs_timeout_max;        /*!< maximum value of the handshake
                                         retransmission timeout (ms)        */
#endif

#if defined(MBEDTLS_SSL_RENEGOTIATION)
    int renego_max_records;         /*!< grace period for renegotiation     */
    unsigned char renego_period[8]; /*!< value of the record counters
                                         that triggers renegotiation        */
#endif

#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
    unsigned int badmac_limit;      /*!< limit of records with a bad MAC    */
#endif

#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
    unsigned int dhm_min_bitlen;    /*!< min. bit length of the DHM prime   */
#endif

    /*
     * Pointers
     */

    const int *ciphersuite_list[4]; /*!< allowed ciphersuites per version   */

    /** Callback for printing debug output                                  */
    void (*f_dbg)(void *, int, const char *, int, const char *);
    void *p_dbg;                    /*!< context for the debug function     */

    /** Callback for getting (pseudo-)random numbers                        */
    int  (*f_rng)(void *, unsigned char *, size_t);
    void *p_rng;                    /*!< context for the RNG function       */

    /** Callback to retrieve a session from the cache                       */
    int (*f_get_cache)(void *, mbedtls_ssl_session *);
    /** Callback to store a session into the cache                          */
    int (*f_set_cache)(void *, const mbedtls_ssl_session *);
    void *p_cache;                  /*!< context for cache callbacks        */

#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
    /** Callback for setting cert according to SNI extension                */
    int (*f_sni)(void *, mbedtls_ssl_context *, const unsigned char *, size_t);
    void *p_sni;                    /*!< context for SNI callback           */
#endif

#if defined(MBEDTLS_X509_CRT_PARSE_C)
    /** Callback to customize X.509 certificate chain verification          */
    int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *);
    void *p_vrfy;                   /*!< context for X.509 verify calllback */
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
    /** Callback to retrieve PSK key from identity                          */
    int (*f_psk)(void *, mbedtls_ssl_context *, const unsigned char *, size_t);
    void *p_psk;                    /*!< context for PSK callback           */
#endif

#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
    /** Callback to create & write a cookie for ClientHello veirifcation    */
    int (*f_cookie_write)( void *, unsigned char **, unsigned char *,
                           const unsigned char *, size_t );
    /** Callback to verify validity of a ClientHello cookie                 */
    int (*f_cookie_check)( void *, const unsigned char *, size_t,
                           const unsigned char *, size_t );
    void *p_cookie;                 /*!< context for the cookie callbacks   */
#endif

#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_SRV_C)
    /** Callback to create & write a session ticket                         */
    int (*f_ticket_write)( void *, const mbedtls_ssl_session *,
            unsigned char *, const unsigned char *, size_t *, uint32_t * );
    /** Callback to parse a session ticket into a session structure         */
    int (*f_ticket_parse)( void *, mbedtls_ssl_session *, unsigned char *, size_t);
    void *p_ticket;                 /*!< context for the ticket callbacks   */
#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_SRV_C */

#if defined(MBEDTLS_SSL_EXPORT_KEYS)
    /** Callback to export key block and master secret                      */
    int (*f_export_keys)( void *, const unsigned char *,
            const unsigned char *, size_t, size_t, size_t );
    /** Callback to export key block, master secret,
     *  tls_prf and random bytes. Should replace f_export_keys    */
    int (*f_export_keys_ext)( void *, const unsigned char *,
                const unsigned char *, size_t, size_t, size_t,
                const unsigned char[32], const unsigned char[32],
                mbedtls_tls_prf_types );
    void *p_export_keys;            /*!< context for key export callback    */
#endif

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
    size_t cid_len; /*!< The length of CIDs for incoming DTLS records.      */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */

#if defined(MBEDTLS_X509_CRT_PARSE_C)
    const mbedtls_x509_crt_profile *cert_profile; /*!< verification profile */
    mbedtls_ssl_key_cert *key_cert; /*!< own certificate/key pair(s)        */
    mbedtls_x509_crt *ca_chain;     /*!< trusted CAs                        */
    mbedtls_x509_crl *ca_crl;       /*!< trusted CAs CRLs                   */
#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
    mbedtls_x509_crt_ca_cb_t f_ca_cb;
    void *p_ca_cb;
#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
#endif /* MBEDTLS_X509_CRT_PARSE_C */

#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
#if defined(MBEDTLS_X509_CRT_PARSE_C)
    mbedtls_ssl_async_sign_t *f_async_sign_start; /*!< start asynchronous signature operation */
    mbedtls_ssl_async_decrypt_t *f_async_decrypt_start; /*!< start asynchronous decryption operation */
#endif /* MBEDTLS_X509_CRT_PARSE_C */
    mbedtls_ssl_async_resume_t *f_async_resume; /*!< resume asynchronous operation */
    mbedtls_ssl_async_cancel_t *f_async_cancel; /*!< cancel asynchronous operation */
    void *p_async_config_data; /*!< Configuration data set by mbedtls_ssl_conf_async_private_cb(). */
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */

#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
    const int *sig_hashes;          /*!< allowed signature hashes           */
#endif

#if defined(MBEDTLS_ECP_C)
    const mbedtls_ecp_group_id *curve_list; /*!< allowed curves             */
#endif

#if defined(MBEDTLS_DHM_C)
    mbedtls_mpi dhm_P;              /*!< prime modulus for DHM              */
    mbedtls_mpi dhm_G;              /*!< generator for DHM                  */
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)

#if defined(MBEDTLS_USE_PSA_CRYPTO)
    psa_key_id_t psk_opaque; /*!< PSA key slot holding opaque PSK. This field
                              *   should only be set via
                              *   mbedtls_ssl_conf_psk_opaque().
                              *   If either no PSK or a raw PSK have been
                              *   configured, this has value \c 0.
                              */
#endif /* MBEDTLS_USE_PSA_CRYPTO */

    unsigned char *psk;      /*!< The raw pre-shared key. This field should
                              *   only be set via mbedtls_ssl_conf_psk().
                              *   If either no PSK or an opaque PSK
                              *   have been configured, this has value NULL. */
    size_t         psk_len;  /*!< The length of the raw pre-shared key.
                              *   This field should only be set via
                              *   mbedtls_ssl_conf_psk().
                              *   Its value is non-zero if and only if
                              *   \c psk is not \c NULL. */

    unsigned char *psk_identity;    /*!< The PSK identity for PSK negotiation.
                                     *   This field should only be set via
                                     *   mbedtls_ssl_conf_psk().
                                     *   This is set if and only if either
                                     *   \c psk or \c psk_opaque are set. */
    size_t         psk_identity_len;/*!< The length of PSK identity.
                                     *   This field should only be set via
                                     *   mbedtls_ssl_conf_psk().
                                     *   Its value is non-zero if and only if
                                     *   \c psk is not \c NULL or \c psk_opaque
                                     *   is not \c 0. */
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */

#if defined(MBEDTLS_SSL_ALPN)
    const char **alpn_list;         /*!< ordered list of protocols          */
#endif

#if defined(MBEDTLS_SSL_DTLS_SRTP)
    /*! ordered list of supported srtp profile */
    const mbedtls_ssl_srtp_profile *dtls_srtp_profile_list;
    /*! number of supported profiles */
    size_t dtls_srtp_profile_list_len;
#endif /* MBEDTLS_SSL_DTLS_SRTP */
};

struct mbedtls_ssl_context
{
    const mbedtls_ssl_config *conf; /*!< configuration information          */

    /*
     * Miscellaneous
     */
    int state;                  /*!< SSL handshake: current state     */
#if defined(MBEDTLS_SSL_RENEGOTIATION)
    int renego_status;          /*!< Initial, in progress, pending?   */
    int renego_records_seen;    /*!< Records since renego request, or with DTLS,
                                  number of retransmissions of request if
                                  renego_max_records is < 0           */
#endif /* MBEDTLS_SSL_RENEGOTIATION */

    int major_ver;              /*!< equal to  MBEDTLS_SSL_MAJOR_VERSION_3    */
    int minor_ver;              /*!< either 0 (SSL3) or 1 (TLS1.0)    */

#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
    unsigned badmac_seen;       /*!< records with a bad MAC received    */
#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */

#if defined(MBEDTLS_X509_CRT_PARSE_C)
    /** Callback to customize X.509 certificate chain verification          */
    int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *);
    void *p_vrfy;                   /*!< context for X.509 verify callback */
#endif

    mbedtls_ssl_send_t *f_send; /*!< Callback for network send */
    mbedtls_ssl_recv_t *f_recv; /*!< Callback for network receive */
    mbedtls_ssl_recv_timeout_t *f_recv_timeout;
                                /*!< Callback for network receive with timeout */

    void *p_bio;                /*!< context for I/O operations   */

    /*
     * Session layer
     */
    mbedtls_ssl_session *session_in;            /*!<  current session data (in)   */
    mbedtls_ssl_session *session_out;           /*!<  current session data (out)  */
    mbedtls_ssl_session *session;               /*!<  negotiated session data     */
    mbedtls_ssl_session *session_negotiate;     /*!<  session data in negotiation */

    mbedtls_ssl_handshake_params *handshake;    /*!<  params required only during
                                              the handshake process        */

    /*
     * Record layer transformations
     */
    mbedtls_ssl_transform *transform_in;        /*!<  current transform params (in)   */
    mbedtls_ssl_transform *transform_out;       /*!<  current transform params (in)   */
    mbedtls_ssl_transform *transform;           /*!<  negotiated transform params     */
    mbedtls_ssl_transform *transform_negotiate; /*!<  transform params in negotiation */

    /*
     * Timers
     */
    void *p_timer;              /*!< context for the timer callbacks */

    mbedtls_ssl_set_timer_t *f_set_timer;       /*!< set timer callback */
    mbedtls_ssl_get_timer_t *f_get_timer;       /*!< get timer callback */

    /*
     * Record layer (incoming data)
     */
    unsigned char *in_buf;      /*!< input buffer                     */
    unsigned char *in_ctr;      /*!< 64-bit incoming message counter
                                     TLS: maintained by us
                                     DTLS: read from peer             */
    unsigned char *in_hdr;      /*!< start of record header           */
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
    unsigned char *in_cid;      /*!< The start of the CID;
                                 *   (the end is marked by in_len).   */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
    unsigned char *in_len;      /*!< two-bytes message length field   */
    unsigned char *in_iv;       /*!< ivlen-byte IV                    */
    unsigned char *in_msg;      /*!< message contents (in_iv+ivlen)   */
    unsigned char *in_offt;     /*!< read offset in application data  */

    int in_msgtype;             /*!< record header: message type      */
    size_t in_msglen;           /*!< record header: message length    */
    size_t in_left;             /*!< amount of data read so far       */
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
    size_t in_buf_len;          /*!< length of input buffer           */
#endif
#if defined(MBEDTLS_SSL_PROTO_DTLS)
    uint16_t in_epoch;          /*!< DTLS epoch for incoming records  */
    size_t next_record_offset;  /*!< offset of the next record in datagram
                                     (equal to in_left if none)       */
#endif /* MBEDTLS_SSL_PROTO_DTLS */
#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
    uint64_t in_window_top;     /*!< last validated record seq_num    */
    uint64_t in_window;         /*!< bitmask for replay detection     */
#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */

    size_t in_hslen;            /*!< current handshake message length,
                                     including the handshake header   */
    int nb_zero;                /*!< # of 0-length encrypted messages */

    int keep_current_message;   /*!< drop or reuse current message
                                     on next call to record layer? */

#if defined(MBEDTLS_SSL_PROTO_DTLS)
    uint8_t disable_datagram_packing;  /*!< Disable packing multiple records
                                        *   within a single datagram.  */
#endif /* MBEDTLS_SSL_PROTO_DTLS */

    /*
     * Record layer (outgoing data)
     */
    unsigned char *out_buf;     /*!< output buffer                    */
    unsigned char *out_ctr;     /*!< 64-bit outgoing message counter  */
    unsigned char *out_hdr;     /*!< start of record header           */
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
    unsigned char *out_cid;     /*!< The start of the CID;
                                 *   (the end is marked by in_len).   */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
    unsigned char *out_len;     /*!< two-bytes message length field   */
    unsigned char *out_iv;      /*!< ivlen-byte IV                    */
    unsigned char *out_msg;     /*!< message contents (out_iv+ivlen)  */

    int out_msgtype;            /*!< record header: message type      */
    size_t out_msglen;          /*!< record header: message length    */
    size_t out_left;            /*!< amount of data not yet written   */
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
    size_t out_buf_len;         /*!< length of output buffer          */
#endif

    unsigned char cur_out_ctr[8]; /*!<  Outgoing record sequence  number. */

#if defined(MBEDTLS_SSL_PROTO_DTLS)
    uint16_t mtu;               /*!< path mtu, used to fragment outgoing messages */
#endif /* MBEDTLS_SSL_PROTO_DTLS */

#if defined(MBEDTLS_ZLIB_SUPPORT)
    unsigned char *compress_buf;        /*!<  zlib data buffer        */
#endif /* MBEDTLS_ZLIB_SUPPORT */
#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
    signed char split_done;     /*!< current record already splitted? */
#endif /* MBEDTLS_SSL_CBC_RECORD_SPLITTING */

    /*
     * PKI layer
     */
    int client_auth;                    /*!<  flag for client auth.   */

    /*
     * User settings
     */
#if defined(MBEDTLS_X509_CRT_PARSE_C)
    char *hostname;             /*!< expected peer CN for verification
                                     (and SNI if available)                 */
#endif /* MBEDTLS_X509_CRT_PARSE_C */

#if defined(MBEDTLS_SSL_ALPN)
    const char *alpn_chosen;    /*!<  negotiated protocol                   */
#endif /* MBEDTLS_SSL_ALPN */

#if defined(MBEDTLS_SSL_DTLS_SRTP)
    /*
     * use_srtp extension
     */
    mbedtls_dtls_srtp_info dtls_srtp_info;
#endif /* MBEDTLS_SSL_DTLS_SRTP */

    /*
     * Information for DTLS hello verify
     */
#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
    unsigned char  *cli_id;         /*!<  transport-level ID of the client  */
    size_t          cli_id_len;     /*!<  length of cli_id                  */
#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */

    /*
     * Secure renegotiation
     */
    /* needed to know when to send extension on server */
    int secure_renegotiation;           /*!<  does peer support legacy or
                                              secure renegotiation           */
#if defined(MBEDTLS_SSL_RENEGOTIATION)
    size_t verify_data_len;             /*!<  length of verify data stored   */
    char own_verify_data[MBEDTLS_SSL_VERIFY_DATA_MAX_LEN]; /*!<  previous handshake verify data */
    char peer_verify_data[MBEDTLS_SSL_VERIFY_DATA_MAX_LEN]; /*!<  previous handshake verify data */
#endif /* MBEDTLS_SSL_RENEGOTIATION */

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
    /* CID configuration to use in subsequent handshakes. */

    /*! The next incoming CID, chosen by the user and applying to
     *  all subsequent handshakes. This may be different from the
     *  CID currently used in case the user has re-configured the CID
     *  after an initial handshake. */
    unsigned char own_cid[ MBEDTLS_SSL_CID_IN_LEN_MAX ];
    uint8_t own_cid_len;   /*!< The length of \c own_cid. */
    uint8_t negotiate_cid; /*!< This indicates whether the CID extension should
                            *   be negotiated in the next handshake or not.
                            *   Possible values are #MBEDTLS_SSL_CID_ENABLED
                            *   and #MBEDTLS_SSL_CID_DISABLED. */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
    void *appData;
};

#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)

#if !defined(MBEDTLS_DEPRECATED_REMOVED)

#define MBEDTLS_SSL_CHANNEL_OUTBOUND   MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( 0 )
#define MBEDTLS_SSL_CHANNEL_INBOUND    MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( 1 )

#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif /* MBEDTLS_DEPRECATED_WARNING */

MBEDTLS_DEPRECATED extern int (*mbedtls_ssl_hw_record_init)(
                    mbedtls_ssl_context *ssl,
                    const unsigned char *key_enc, const unsigned char *key_dec,
                    size_t keylen,
                    const unsigned char *iv_enc,  const unsigned char *iv_dec,
                    size_t ivlen,
                    const unsigned char *mac_enc, const unsigned char *mac_dec,
                    size_t maclen);
MBEDTLS_DEPRECATED extern int (*mbedtls_ssl_hw_record_activate)(
                                                    mbedtls_ssl_context *ssl,
                                                    int direction );
MBEDTLS_DEPRECATED extern int (*mbedtls_ssl_hw_record_reset)(
                                                    mbedtls_ssl_context *ssl );
MBEDTLS_DEPRECATED extern int (*mbedtls_ssl_hw_record_write)(
                                                    mbedtls_ssl_context *ssl );
MBEDTLS_DEPRECATED extern int (*mbedtls_ssl_hw_record_read)(
                                                    mbedtls_ssl_context *ssl );
MBEDTLS_DEPRECATED extern int (*mbedtls_ssl_hw_record_finish)(
                                                    mbedtls_ssl_context *ssl );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */

/**
 * \brief               Return the name of the ciphersuite associated with the
 *                      given ID
 *
 * \param ciphersuite_id SSL ciphersuite ID
 *
 * \return              a string containing the ciphersuite name
 */
const char *mbedtls_ssl_get_ciphersuite_name( const int ciphersuite_id );

/**
 * \brief               Return the ID of the ciphersuite associated with the
 *                      given name
 *
 * \param ciphersuite_name SSL ciphersuite name
 *
 * \return              the ID with the ciphersuite or 0 if not found
 */
int mbedtls_ssl_get_ciphersuite_id( const char *ciphersuite_name );

/**
 * \brief          Initialize an SSL context
 *                 Just makes the context ready for mbedtls_ssl_setup() or
 *                 mbedtls_ssl_free()
 *
 * \param ssl      SSL context
 */
void mbedtls_ssl_init( mbedtls_ssl_context *ssl );

/**
 * \brief          Set up an SSL context for use
 *
 * \note           No copy of the configuration context is made, it can be
 *                 shared by many mbedtls_ssl_context structures.
 *
 * \warning        The conf structure will be accessed during the session.
 *                 It must not be modified or freed as long as the session
 *                 is active.
 *
 * \warning        This function must be called exactly once per context.
 *                 Calling mbedtls_ssl_setup again is not supported, even
 *                 if no session is active.
 *
 * \param ssl      SSL context
 * \param conf     SSL configuration to use
 *
 * \return         0 if successful, or MBEDTLS_ERR_SSL_ALLOC_FAILED if
 *                 memory allocation failed
 */
int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
                       const mbedtls_ssl_config *conf );

/**
 * \brief          Reset an already initialized SSL context for re-use
 *                 while retaining application-set variables, function
 *                 pointers and data.
 *
 * \param ssl      SSL context
 * \return         0 if successful, or MBEDTLS_ERR_SSL_ALLOC_FAILED,
                   MBEDTLS_ERR_SSL_HW_ACCEL_FAILED or
 *                 MBEDTLS_ERR_SSL_COMPRESSION_FAILED
 */
int mbedtls_ssl_session_reset( mbedtls_ssl_context *ssl );

/**
 * \brief          Set the current endpoint type
 *
 * \param conf     SSL configuration
 * \param endpoint must be MBEDTLS_SSL_IS_CLIENT or MBEDTLS_SSL_IS_SERVER
 */
void mbedtls_ssl_conf_endpoint( mbedtls_ssl_config *conf, int endpoint );

/**
 * \brief           Set the transport type (TLS or DTLS).
 *                  Default: TLS
 *
 * \note            For DTLS, you must either provide a recv callback that
 *                  doesn't block, or one that handles timeouts, see
 *                  \c mbedtls_ssl_set_bio(). You also need to provide timer
 *                  callbacks with \c mbedtls_ssl_set_timer_cb().
 *
 * \param conf      SSL configuration
 * \param transport transport type:
 *                  MBEDTLS_SSL_TRANSPORT_STREAM for TLS,
 *                  MBEDTLS_SSL_TRANSPORT_DATAGRAM for DTLS.
 */
void mbedtls_ssl_conf_transport( mbedtls_ssl_config *conf, int transport );

/**
 * \brief          Set the certificate verification mode
 *                 Default: NONE on server, REQUIRED on client
 *
 * \param conf     SSL configuration
 * \param authmode can be:
 *
 *  MBEDTLS_SSL_VERIFY_NONE:      peer certificate is not checked
 *                        (default on server)
 *                        (insecure on client)
 *
 *  MBEDTLS_SSL_VERIFY_OPTIONAL:  peer certificate is checked, however the
 *                        handshake continues even if verification failed;
 *                        mbedtls_ssl_get_verify_result() can be called after the
 *                        handshake is complete.
 *
 *  MBEDTLS_SSL_VERIFY_REQUIRED:  peer *must* present a valid certificate,
 *                        handshake is aborted if verification failed.
 *                        (default on client)
 *
 * \note On client, MBEDTLS_SSL_VERIFY_REQUIRED is the recommended mode.
 * With MBEDTLS_SSL_VERIFY_OPTIONAL, the user needs to call mbedtls_ssl_get_verify_result() at
 * the right time(s), which may not be obvious, while REQUIRED always perform
 * the verification as soon as possible. For example, REQUIRED was protecting
 * against the "triple handshake" attack even before it was found.
 */
void mbedtls_ssl_conf_authmode( mbedtls_ssl_config *conf, int authmode );

#if defined(MBEDTLS_X509_CRT_PARSE_C)
/**
 * \brief          Set the verification callback (Optional).
 *
 *                 If set, the provided verify callback is called for each
 *                 certificate in the peer's CRT chain, including the trusted
 *                 root. For more information, please see the documentation of
 *                 \c mbedtls_x509_crt_verify().
 *
 * \note           For per context callbacks and contexts, please use
 *                 mbedtls_ssl_set_verify() instead.
 *
 * \param conf     The SSL configuration to use.
 * \param f_vrfy   The verification callback to use during CRT verification.
 * \param p_vrfy   The opaque context to be passed to the callback.
 */
void mbedtls_ssl_conf_verify( mbedtls_ssl_config *conf,
                     int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
                     void *p_vrfy );
#endif /* MBEDTLS_X509_CRT_PARSE_C */

/**
 * \brief          Set the random number generator callback
 *
 * \param conf     SSL configuration
 * \param f_rng    RNG function
 * \param p_rng    RNG parameter
 */
void mbedtls_ssl_conf_rng( mbedtls_ssl_config *conf,
                  int (*f_rng)(void *, unsigned char *, size_t),
                  void *p_rng );

/**
 * \brief          Set the debug callback
 *
 *                 The callback has the following argument:
 *                 void *           opaque context for the callback
 *                 int              debug level
 *                 const char *     file name
 *                 int              line number
 *                 const char *     message
 *
 * \param conf     SSL configuration
 * \param f_dbg    debug function
 * \param p_dbg    debug parameter
 */
void mbedtls_ssl_conf_dbg( mbedtls_ssl_config *conf,
                  void (*f_dbg)(void *, int, const char *, int, const char *),
                  void  *p_dbg );

/**
 * \brief          Set the underlying BIO callbacks for write, read and
 *                 read-with-timeout.
 *
 * \param ssl      SSL context
 * \param p_bio    parameter (context) shared by BIO callbacks
 * \param f_send   write callback
 * \param f_recv   read callback
 * \param f_recv_timeout blocking read callback with timeout.
 *
 * \note           One of f_recv or f_recv_timeout can be NULL, in which case
 *                 the other is used. If both are non-NULL, f_recv_timeout is
 *                 used and f_recv is ignored (as if it were NULL).
 *
 * \note           The two most common use cases are:
 *                 - non-blocking I/O, f_recv != NULL, f_recv_timeout == NULL
 *                 - blocking I/O, f_recv == NULL, f_recv_timout != NULL
 *
 * \note           For DTLS, you need to provide either a non-NULL
 *                 f_recv_timeout callback, or a f_recv that doesn't block.
 *
 * \note           See the documentations of \c mbedtls_ssl_send_t,
 *                 \c mbedtls_ssl_recv_t and \c mbedtls_ssl_recv_timeout_t for
 *                 the conventions those callbacks must follow.
 *
 * \note           On some platforms, net_sockets.c provides
 *                 \c mbedtls_net_send(), \c mbedtls_net_recv() and
 *                 \c mbedtls_net_recv_timeout() that are suitable to be used
 *                 here.
 */
void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl,
                          void *p_bio,
                          mbedtls_ssl_send_t *f_send,
                          mbedtls_ssl_recv_t *f_recv,
                          mbedtls_ssl_recv_timeout_t *f_recv_timeout );

#if defined(MBEDTLS_SSL_PROTO_DTLS)

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)


/**
 * \brief             Configure the use of the Connection ID (CID)
 *                    extension in the next handshake.
 *
 *                    Reference: draft-ietf-tls-dtls-connection-id-05
 *                    https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
 *
 *                    The DTLS CID extension allows the reliable association of
 *                    DTLS records to DTLS connections across changes in the
 *                    underlying transport (changed IP and Port metadata) by
 *                    adding explicit connection identifiers (CIDs) to the
 *                    headers of encrypted DTLS records. The desired CIDs are
 *                    configured by the application layer and are exchanged in
 *                    new `ClientHello` / `ServerHello` extensions during the
 *                    handshake, where each side indicates the CID it wants the
 *                    peer to use when writing encrypted messages. The CIDs are
 *                    put to use once records get encrypted: the stack discards
 *                    any incoming records that don't include the configured CID
 *                    in their header, and adds the peer's requested CID to the
 *                    headers of outgoing messages.
 *
 *                    This API enables or disables the use of the CID extension
 *                    in the next handshake and sets the value of the CID to
 *                    be used for incoming messages.
 *
 * \param ssl         The SSL context to configure. This must be initialized.
 * \param enable      This value determines whether the CID extension should
 *                    be used or not. Possible values are:
 *                    - MBEDTLS_SSL_CID_ENABLED to enable the use of the CID.
 *                    - MBEDTLS_SSL_CID_DISABLED (default) to disable the use
 *                      of the CID.
 * \param own_cid     The address of the readable buffer holding the CID we want
 *                    the peer to use when sending encrypted messages to us.
 *                    This may be \c NULL if \p own_cid_len is \c 0.
 *                    This parameter is unused if \p enabled is set to
 *                    MBEDTLS_SSL_CID_DISABLED.
 * \param own_cid_len The length of \p own_cid.
 *                    This parameter is unused if \p enabled is set to
 *                    MBEDTLS_SSL_CID_DISABLED.
 *
 * \note              The value of \p own_cid_len must match the value of the
 *                    \c len parameter passed to mbedtls_ssl_conf_cid()
 *                    when configuring the ::mbedtls_ssl_config that \p ssl
 *                    is bound to.
 *
 * \note              This CID configuration applies to subsequent handshakes
 *                    performed on the SSL context \p ssl, but does not trigger
 *                    one. You still have to call `mbedtls_ssl_handshake()`
 *                    (for the initial handshake) or `mbedtls_ssl_renegotiate()`
 *                    (for a renegotiation handshake) explicitly after a
 *                    successful call to this function to run the handshake.
 *
 * \note              This call cannot guarantee that the use of the CID
 *                    will be successfully negotiated in the next handshake,
 *                    because the peer might not support it. Specifically:
 *                    - On the Client, enabling the use of the CID through
 *                      this call implies that the `ClientHello` in the next
 *                      handshake will include the CID extension, thereby
 *                      offering the use of the CID to the server. Only if
 *                      the `ServerHello` contains the CID extension, too,
 *                      the CID extension will actually be put to use.
 *                    - On the Server, enabling the use of the CID through
 *                      this call implies that that the server will look for
 *                      the CID extension in a `ClientHello` from the client,
 *                      and, if present, reply with a CID extension in its
 *                      `ServerHello`.
 *
 * \note              To check whether the use of the CID was negotiated
 *                    after the subsequent handshake has completed, please
 *                    use the API mbedtls_ssl_get_peer_cid().
 *
 * \warning           If the use of the CID extension is enabled in this call
 *                    and the subsequent handshake negotiates its use, Mbed TLS
 *                    will silently drop every packet whose CID does not match
 *                    the CID configured in \p own_cid. It is the responsibility
 *                    of the user to adapt the underlying transport to take care
 *                    of CID-based demultiplexing before handing datagrams to
 *                    Mbed TLS.
 *
 * \return            \c 0 on success. In this case, the CID configuration
 *                    applies to the next handshake.
 * \return            A negative error code on failure.
 */
int mbedtls_ssl_set_cid( mbedtls_ssl_context *ssl,
                         int enable,
                         unsigned char const *own_cid,
                         size_t own_cid_len );

/**
 * \brief              Get information about the use of the CID extension
 *                     in the current connection.
 *
 * \param ssl          The SSL context to query.
 * \param enabled      The address at which to store whether the CID extension
 *                     is currently in use or not. If the CID is in use,
 *                     `*enabled` is set to MBEDTLS_SSL_CID_ENABLED;
 *                     otherwise, it is set to MBEDTLS_SSL_CID_DISABLED.
 * \param peer_cid     The address of the buffer in which to store the CID
 *                     chosen by the peer (if the CID extension is used).
 *                     This may be \c NULL in case the value of peer CID
 *                     isn't needed. If it is not \c NULL, \p peer_cid_len
 *                     must not be \c NULL.
 * \param peer_cid_len The address at which to store the size of the CID
 *                     chosen by the peer (if the CID extension is used).
 *                     This is also the number of Bytes in \p peer_cid that
 *                     have been written.
 *                     This may be \c NULL in case the length of the peer CID
 *                     isn't needed. If it is \c NULL, \p peer_cid must be
 *                     \c NULL, too.
 *
 * \note               This applies to the state of the CID negotiated in
 *                     the last complete handshake. If a handshake is in
 *                     progress, this function will attempt to complete
 *                     the handshake first.
 *
 * \note               If CID extensions have been exchanged but both client
 *                     and server chose to use an empty CID, this function
 *                     sets `*enabled` to #MBEDTLS_SSL_CID_DISABLED
 *                     (the rationale for this is that the resulting
 *                     communication is the same as if the CID extensions
 *                     hadn't been used).
 *
 * \return            \c 0 on success.
 * \return            A negative error code on failure.
 */
int mbedtls_ssl_get_peer_cid( mbedtls_ssl_context *ssl,
                     int *enabled,
                     unsigned char peer_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ],
                     size_t *peer_cid_len );

#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */

/**
 * \brief          Set the Maximum Tranport Unit (MTU).
 *                 Special value: 0 means unset (no limit).
 *                 This represents the maximum size of a datagram payload
 *                 handled by the transport layer (usually UDP) as determined
 *                 by the network link and stack. In practice, this controls
 *                 the maximum size datagram the DTLS layer will pass to the
 *                 \c f_send() callback set using \c mbedtls_ssl_set_bio().
 *
 * \note           The limit on datagram size is converted to a limit on
 *                 record payload by subtracting the current overhead of
 *                 encapsulation and encryption/authentication if any.
 *
 * \note           This can be called at any point during the connection, for
 *                 example when a Path Maximum Transfer Unit (PMTU)
 *                 estimate becomes available from other sources,
 *                 such as lower (or higher) protocol layers.
 *
 * \note           This setting only controls the size of the packets we send,
 *                 and does not restrict the size of the datagrams we're
 *                 willing to receive. Client-side, you can request the
 *                 server to use smaller records with \c
 *                 mbedtls_ssl_conf_max_frag_len().
 *
 * \note           If both a MTU and a maximum fragment length have been
 *                 configured (or negotiated with the peer), the resulting
 *                 lower limit on record payload (see first note) is used.
 *
 * \note           This can only be used to decrease the maximum size
 *                 of datagrams (hence records, see first note) sent. It
 *                 cannot be used to increase the maximum size of records over
 *                 the limit set by #MBEDTLS_SSL_OUT_CONTENT_LEN.
 *
 * \note           Values lower than the current record layer expansion will
 *                 result in an error when trying to send data.
 *
 * \note           Using record compression together with a non-zero MTU value
 *                 will result in an error when trying to send data.
 *
 * \param ssl      SSL context
 * \param mtu      Value of the path MTU in bytes
 */
void mbedtls_ssl_set_mtu( mbedtls_ssl_context *ssl, uint16_t mtu );
#endif /* MBEDTLS_SSL_PROTO_DTLS */

#if defined(MBEDTLS_X509_CRT_PARSE_C)
/**
 * \brief          Set a connection-specific verification callback (optional).
 *
 *                 If set, the provided verify callback is called for each
 *                 certificate in the peer's CRT chain, including the trusted
 *                 root. For more information, please see the documentation of
 *                 \c mbedtls_x509_crt_verify().
 *
 * \note           This call is analogous to mbedtls_ssl_conf_verify() but
 *                 binds the verification callback and context to an SSL context
 *                 as opposed to an SSL configuration.
 *                 If mbedtls_ssl_conf_verify() and mbedtls_ssl_set_verify()
 *                 are both used, mbedtls_ssl_set_verify() takes precedence.
 *
 * \param ssl      The SSL context to use.
 * \param f_vrfy   The verification callback to use during CRT verification.
 * \param p_vrfy   The opaque context to be passed to the callback.
 */
void mbedtls_ssl_set_verify( mbedtls_ssl_context *ssl,
                     int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
                     void *p_vrfy );
#endif /* MBEDTLS_X509_CRT_PARSE_C */

/**
 * \brief          Set the timeout period for mbedtls_ssl_read()
 *                 (Default: no timeout.)
 *
 * \param conf     SSL configuration context
 * \param timeout  Timeout value in milliseconds.
 *                 Use 0 for no timeout (default).
 *
 * \note           With blocking I/O, this will only work if a non-NULL
 *                 \c f_recv_timeout was set with \c mbedtls_ssl_set_bio().
 *                 With non-blocking I/O, this will only work if timer
 *                 callbacks were set with \c mbedtls_ssl_set_timer_cb().
 *
 * \note           With non-blocking I/O, you may also skip this function
 *                 altogether and handle timeouts at the application layer.
 */
void mbedtls_ssl_conf_read_timeout( mbedtls_ssl_config *conf, uint32_t timeout );

#if defined(MBEDTLS_SSL_RECORD_CHECKING)
/**
 * \brief          Check whether a buffer contains a valid and authentic record
 *                 that has not been seen before. (DTLS only).
 *
 *                 This function does not change the user-visible state
 *                 of the SSL context. Its sole purpose is to provide
 *                 an indication of the legitimacy of an incoming record.
 *
 *                 This can be useful e.g. in distributed server environments
 *                 using the DTLS Connection ID feature, in which connections
 *                 might need to be passed between service instances on a change
 *                 of peer address, but where such disruptive operations should
 *                 only happen after the validity of incoming records has been
 *                 confirmed.
 *
 * \param ssl      The SSL context to use.
 * \param buf      The address of the buffer holding the record to be checked.
 *                 This must be a read/write buffer of length \p buflen Bytes.
 * \param buflen   The length of \p buf in Bytes.
 *
 * \note           This routine only checks whether the provided buffer begins
 *                 with a valid and authentic record that has not been seen
 *                 before, but does not check potential data following the
 *                 initial record. In particular, it is possible to pass DTLS
 *                 datagrams containing multiple records, in which case only
 *                 the first record is checked.
 *
 * \note           This function modifies the input buffer \p buf. If you need
 *                 to preserve the original record, you have to maintain a copy.
 *
 * \return         \c 0 if the record is valid and authentic and has not been
 *                 seen before.
 * \return         MBEDTLS_ERR_SSL_INVALID_MAC if the check completed
 *                 successfully but the record was found to be not authentic.
 * \return         MBEDTLS_ERR_SSL_INVALID_RECORD if the check completed
 *                 successfully but the record was found to be invalid for
 *                 a reason different from authenticity checking.
 * \return         MBEDTLS_ERR_SSL_UNEXPECTED_RECORD if the check completed
 *                 successfully but the record was found to be unexpected
 *                 in the state of the SSL context, including replayed records.
 * \return         Another negative error code on different kinds of failure.
 *                 In this case, the SSL context becomes unusable and needs
 *                 to be freed or reset before reuse.
 */
int mbedtls_ssl_check_record( mbedtls_ssl_context const *ssl,
                              unsigned char *buf,
                              size_t buflen );
#endif /* MBEDTLS_SSL_RECORD_CHECKING */

/**
 * \brief          Set the timer callbacks (Mandatory for DTLS.)
 *
 * \param ssl      SSL context
 * \param p_timer  parameter (context) shared by timer callbacks
 * \param f_set_timer   set timer callback
 * \param f_get_timer   get timer callback. Must return:
 *
 * \note           See the documentation of \c mbedtls_ssl_set_timer_t and
 *                 \c mbedtls_ssl_get_timer_t for the conventions this pair of
 *                 callbacks must follow.
 *
 * \note           On some platforms, timing.c provides
 *                 \c mbedtls_timing_set_delay() and
 *                 \c mbedtls_timing_get_delay() that are suitable for using
 *                 here, except if using an event-driven style.
 *
 * \note           See also the "DTLS tutorial" article in our knowledge base.
 *                 https://tls.mbed.org/kb/how-to/dtls-tutorial
 */
void mbedtls_ssl_set_timer_cb( mbedtls_ssl_context *ssl,
                               void *p_timer,
                               mbedtls_ssl_set_timer_t *f_set_timer,
                               mbedtls_ssl_get_timer_t *f_get_timer );

/**
 * \brief           Callback type: generate and write session ticket
 *
 * \note            This describes what a callback implementation should do.
 *                  This callback should generate an encrypted and
 *                  authenticated ticket for the session and write it to the
 *                  output buffer. Here, ticket means the opaque ticket part
 *                  of the NewSessionTicket structure of RFC 5077.
 *
 * \param p_ticket  Context for the callback
 * \param session   SSL session to be written in the ticket
 * \param start     Start of the output buffer
 * \param end       End of the output buffer
 * \param tlen      On exit, holds the length written
 * \param lifetime  On exit, holds the lifetime of the ticket in seconds
 *
 * \return          0 if successful, or
 *                  a specific MBEDTLS_ERR_XXX code.
 */
typedef int mbedtls_ssl_ticket_write_t( void *p_ticket,
                                        const mbedtls_ssl_session *session,
                                        unsigned char *start,
                                        const unsigned char *end,
                                        size_t *tlen,
                                        uint32_t *lifetime );

#if defined(MBEDTLS_SSL_EXPORT_KEYS)
/**
 * \brief           Callback type: Export key block and master secret
 *
 * \note            This is required for certain uses of TLS, e.g. EAP-TLS
 *                  (RFC 5216) and Thread. The key pointers are ephemeral and
 *                  therefore must not be stored. The master secret and keys
 *                  should not be used directly except as an input to a key
 *                  derivation function.
 *
 * \param p_expkey  Context for the callback
 * \param ms        Pointer to master secret (fixed length: 48 bytes)
 * \param kb        Pointer to key block, see RFC 5246 section 6.3
 *                  (variable length: 2 * maclen + 2 * keylen + 2 * ivlen).
 * \param maclen    MAC length
 * \param keylen    Key length
 * \param ivlen     IV length
 *
 * \return          0 if successful, or
 *                  a specific MBEDTLS_ERR_XXX code.
 */
typedef int mbedtls_ssl_export_keys_t( void *p_expkey,
                                const unsigned char *ms,
                                const unsigned char *kb,
                                size_t maclen,
                                size_t keylen,
                                size_t ivlen );

/**
 * \brief           Callback type: Export key block, master secret,
 *                                 handshake randbytes and the tls_prf function
 *                                 used to derive keys.
 *
 * \note            This is required for certain uses of TLS, e.g. EAP-TLS
 *                  (RFC 5216) and Thread. The key pointers are ephemeral and
 *                  therefore must not be stored. The master secret and keys
 *                  should not be used directly except as an input to a key
 *                  derivation function.
 *
 * \param p_expkey  Context for the callback.
 * \param ms        Pointer to master secret (fixed length: 48 bytes).
 * \param kb            Pointer to key block, see RFC 5246 section 6.3.
 *                      (variable length: 2 * maclen + 2 * keylen + 2 * ivlen).
 * \param maclen        MAC length.
 * \param keylen        Key length.
 * \param ivlen         IV length.
 * \param client_random The client random bytes.
 * \param server_random The server random bytes.
 * \param tls_prf_type The tls_prf enum type.
 *
 * \return          0 if successful, or
 *                  a specific MBEDTLS_ERR_XXX code.
 */
typedef int mbedtls_ssl_export_keys_ext_t( void *p_expkey,
                                           const unsigned char *ms,
                                           const unsigned char *kb,
                                           size_t maclen,
                                           size_t keylen,
                                           size_t ivlen,
                                           const unsigned char client_random[32],
                                           const unsigned char server_random[32],
                                           mbedtls_tls_prf_types tls_prf_type );
#endif /* MBEDTLS_SSL_EXPORT_KEYS */

/**
 * \brief           Callback type: parse and load session ticket
 *
 * \note            This describes what a callback implementation should do.
 *                  This callback should parse a session ticket as generated
 *                  by the corresponding mbedtls_ssl_ticket_write_t function,
 *                  and, if the ticket is authentic and valid, load the
 *                  session.
 *
 * \note            The implementation is allowed to modify the first len
 *                  bytes of the input buffer, eg to use it as a temporary
 *                  area for the decrypted ticket contents.
 *
 * \param p_ticket  Context for the callback
 * \param session   SSL session to be loaded
 * \param buf       Start of the buffer containing the ticket
 * \param len       Length of the ticket.
 *
 * \return          0 if successful, or
 *                  MBEDTLS_ERR_SSL_INVALID_MAC if not authentic, or
 *                  MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED if expired, or
 *                  any other non-zero code for other failures.
 */
typedef int mbedtls_ssl_ticket_parse_t( void *p_ticket,
                                        mbedtls_ssl_session *session,
                                        unsigned char *buf,
                                        size_t len );

#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_SRV_C)
/**
 * \brief           Configure SSL session ticket callbacks (server only).
 *                  (Default: none.)
 *
 * \note            On server, session tickets are enabled by providing
 *                  non-NULL callbacks.
 *
 * \note            On client, use \c mbedtls_ssl_conf_session_tickets().
 *
 * \param conf      SSL configuration context
 * \param f_ticket_write    Callback for writing a ticket
 * \param f_ticket_parse    Callback for parsing a ticket
 * \param p_ticket          Context shared by the two callbacks
 */
void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
        mbedtls_ssl_ticket_write_t *f_ticket_write,
        mbedtls_ssl_ticket_parse_t *f_ticket_parse,
        void *p_ticket );
#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_SRV_C */

#if defined(MBEDTLS_SSL_EXPORT_KEYS)
/**
 * \brief           Configure key export callback.
 *                  (Default: none.)
 *
 * \note            See \c mbedtls_ssl_export_keys_t.
 *
 * \param conf      SSL configuration context
 * \param f_export_keys     Callback for exporting keys
 * \param p_export_keys     Context for the callback
 */
void mbedtls_ssl_conf_export_keys_cb( mbedtls_ssl_config *conf,
        mbedtls_ssl_export_keys_t *f_export_keys,
        void *p_export_keys );

/**
 * \brief           Configure extended key export callback.
 *                  (Default: none.)
 *
 * \note            See \c mbedtls_ssl_export_keys_ext_t.
 * \warning         Exported key material must not be used for any purpose
 *                  before the (D)TLS handshake is completed
 *
 * \param conf      SSL configuration context
 * \param f_export_keys_ext Callback for exporting keys
 * \param p_export_keys     Context for the callback
 */
void mbedtls_ssl_conf_export_keys_ext_cb( mbedtls_ssl_config *conf,
        mbedtls_ssl_export_keys_ext_t *f_export_keys_ext,
        void *p_export_keys );
#endif /* MBEDTLS_SSL_EXPORT_KEYS */

#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
/**
 * \brief           Configure asynchronous private key operation callbacks.
 *
 * \param conf              SSL configuration context
 * \param f_async_sign      Callback to start a signature operation. See
 *                          the description of ::mbedtls_ssl_async_sign_t
 *                          for more information. This may be \c NULL if the
 *                          external processor does not support any signature
 *                          operation; in this case the private key object
 *                          associated with the certificate will be used.
 * \param f_async_decrypt   Callback to start a decryption operation. See
 *                          the description of ::mbedtls_ssl_async_decrypt_t
 *                          for more information. This may be \c NULL if the
 *                          external processor does not support any decryption
 *                          operation; in this case the private key object
 *                          associated with the certificate will be used.
 * \param f_async_resume    Callback to resume an asynchronous operation. See
 *                          the description of ::mbedtls_ssl_async_resume_t
 *                          for more information. This may not be \c NULL unless
 *                          \p f_async_sign and \p f_async_decrypt are both
 *                          \c NULL.
 * \param f_async_cancel    Callback to cancel an asynchronous operation. See
 *                          the description of ::mbedtls_ssl_async_cancel_t
 *                          for more information. This may be \c NULL if
 *                          no cleanup is needed.
 * \param config_data       A pointer to configuration data which can be
 *                          retrieved with
 *                          mbedtls_ssl_conf_get_async_config_data(). The
 *                          library stores this value without dereferencing it.
 */
void mbedtls_ssl_conf_async_private_cb( mbedtls_ssl_config *conf,
                                        mbedtls_ssl_async_sign_t *f_async_sign,
                                        mbedtls_ssl_async_decrypt_t *f_async_decrypt,
                                        mbedtls_ssl_async_resume_t *f_async_resume,
                                        mbedtls_ssl_async_cancel_t *f_async_cancel,
                                        void *config_data );

/**
 * \brief           Retrieve the configuration data set by
 *                  mbedtls_ssl_conf_async_private_cb().
 *
 * \param conf      SSL configuration context
 * \return          The configuration data set by
 *                  mbedtls_ssl_conf_async_private_cb().
 */
void *mbedtls_ssl_conf_get_async_config_data( const mbedtls_ssl_config *conf );

/**
 * \brief           Retrieve the asynchronous operation user context.
 *
 * \note            This function may only be called while a handshake
 *                  is in progress.
 *
 * \param ssl       The SSL context to access.
 *
 * \return          The asynchronous operation user context that was last
 *                  set during the current handshake. If
 *                  mbedtls_ssl_set_async_operation_data() has not yet been
 *                  called during the current handshake, this function returns
 *                  \c NULL.
 */
void *mbedtls_ssl_get_async_operation_data( const mbedtls_ssl_context *ssl );

/**
 * \brief           Retrieve the asynchronous operation user context.
 *
 * \note            This function may only be called while a handshake
 *                  is in progress.
 *
 * \param ssl       The SSL context to access.
 * \param ctx       The new value of the asynchronous operation user context.
 *                  Call mbedtls_ssl_get_async_operation_data() later during the
 *                  same handshake to retrieve this value.
 */
void mbedtls_ssl_set_async_operation_data( mbedtls_ssl_context *ssl,
                                 void *ctx );
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */

/**
 * \brief          Callback type: generate a cookie
 *
 * \param ctx      Context for the callback
 * \param p        Buffer to write to,
 *                 must be updated to point right after the cookie
 * \param end      Pointer to one past the end of the output buffer
 * \param info     Client ID info that was passed to
 *                 \c mbedtls_ssl_set_client_transport_id()
 * \param ilen     Length of info in bytes
 *
 * \return         The callback must return 0 on success,
 *                 or a negative error code.
 */
typedef int mbedtls_ssl_cookie_write_t( void *ctx,
                                unsigned char **p, unsigned char *end,
                                const unsigned char *info, size_t ilen );

/**
 * \brief          Callback type: verify a cookie
 *
 * \param ctx      Context for the callback
 * \param cookie   Cookie to verify
 * \param clen     Length of cookie
 * \param info     Client ID info that was passed to
 *                 \c mbedtls_ssl_set_client_transport_id()
 * \param ilen     Length of info in bytes
 *
 * \return         The callback must return 0 if cookie is valid,
 *                 or a negative error code.
 */
typedef int mbedtls_ssl_cookie_check_t( void *ctx,
                                const unsigned char *cookie, size_t clen,
                                const unsigned char *info, size_t ilen );

#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
/**
 * \brief           Register callbacks for DTLS cookies
 *                  (Server only. DTLS only.)
 *
 *                  Default: dummy callbacks that fail, in order to force you to
 *                  register working callbacks (and initialize their context).
 *
 *                  To disable HelloVerifyRequest, register NULL callbacks.
 *
 * \warning         Disabling hello verification allows your server to be used
 *                  for amplification in DoS attacks against other hosts.
 *                  Only disable if you known this can't happen in your
 *                  particular environment.
 *
 * \note            See comments on \c mbedtls_ssl_handshake() about handling
 *                  the MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED that is expected
 *                  on the first handshake attempt when this is enabled.
 *
 * \note            This is also necessary to handle client reconnection from
 *                  the same port as described in RFC 6347 section 4.2.8 (only
 *                  the variant with cookies is supported currently). See
 *                  comments on \c mbedtls_ssl_read() for details.
 *
 * \param conf              SSL configuration
 * \param f_cookie_write    Cookie write callback
 * \param f_cookie_check    Cookie check callback
 * \param p_cookie          Context for both callbacks
 */
void mbedtls_ssl_conf_dtls_cookies( mbedtls_ssl_config *conf,
                           mbedtls_ssl_cookie_write_t *f_cookie_write,
                           mbedtls_ssl_cookie_check_t *f_cookie_check,
                           void *p_cookie );

/**
 * \brief          Set client's transport-level identification info.
 *                 (Server only. DTLS only.)
 *
 *                 This is usually the IP address (and port), but could be
 *                 anything identify the client depending on the underlying
 *                 network stack. Used for HelloVerifyRequest with DTLS.
 *                 This is *not* used to route the actual packets.
 *
 * \param ssl      SSL context
 * \param info     Transport-level info identifying the client (eg IP + port)
 * \param ilen     Length of info in bytes
 *
 * \note           An internal copy is made, so the info buffer can be reused.
 *
 * \return         0 on success,
 *                 MBEDTLS_ERR_SSL_BAD_INPUT_DATA if used on client,
 *                 MBEDTLS_ERR_SSL_ALLOC_FAILED if out of memory.
 */
int mbedtls_ssl_set_client_transport_id( mbedtls_ssl_context *ssl,
                                 const unsigned char *info,
                                 size_t ilen );

#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */

#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
/**
 * \brief          Enable or disable anti-replay protection for DTLS.
 *                 (DTLS only, no effect on TLS.)
 *                 Default: enabled.
 *
 * \param conf     SSL configuration
 * \param mode     MBEDTLS_SSL_ANTI_REPLAY_ENABLED or MBEDTLS_SSL_ANTI_REPLAY_DISABLED.
 *
 * \warning        Disabling this is a security risk unless the application
 *                 protocol handles duplicated packets in a safe way. You
 *                 should not disable this without careful consideration.
 *                 However, if your application already detects duplicated
 *                 packets and needs information about them to adjust its
 *                 transmission strategy, then you'll want to disable this.
 */
void mbedtls_ssl_conf_dtls_anti_replay( mbedtls_ssl_config *conf, char mode );
#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */

#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
/**
 * \brief          Set a limit on the number of records with a bad MAC
 *                 before terminating the connection.
 *                 (DTLS only, no effect on TLS.)
 *                 Default: 0 (disabled).
 *
 * \param conf     SSL configuration
 * \param limit    Limit, or 0 to disable.
 *
 * \note           If the limit is N, then the connection is terminated when
 *                 the Nth non-authentic record is seen.
 *
 * \note           Records with an invalid header are not counted, only the
 *                 ones going through the authentication-decryption phase.
 *
 * \note           This is a security trade-off related to the fact that it's
 *                 often relatively easy for an active attacker ot inject UDP
 *                 datagrams. On one hand, setting a low limit here makes it
 *                 easier for such an attacker to forcibly terminated a
 *                 connection. On the other hand, a high limit or no limit
 *                 might make us waste resources checking authentication on
 *                 many bogus packets.
 */
void mbedtls_ssl_conf_dtls_badmac_limit( mbedtls_ssl_config *conf, unsigned limit );
#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */

#if defined(MBEDTLS_SSL_PROTO_DTLS)

/**
 * \brief          Allow or disallow packing of multiple handshake records
 *                 within a single datagram.
 *
 * \param ssl           The SSL context to configure.
 * \param allow_packing This determines whether datagram packing may
 *                      be used or not. A value of \c 0 means that every
 *                      record will be sent in a separate datagram; a
 *                      value of \c 1 means that, if space permits,
 *                      multiple handshake messages (including CCS) belonging to
 *                      a single flight may be packed within a single datagram.
 *
 * \note           This is enabled by default and should only be disabled
 *                 for test purposes, or if datagram packing causes
 *                 interoperability issues with peers that don't support it.
 *
 * \note           Allowing datagram packing reduces the network load since
 *                 there's less overhead if multiple messages share the same
 *                 datagram. Also, it increases the handshake efficiency
 *                 since messages belonging to a single datagram will not
 *                 be reordered in transit, and so future message buffering
 *                 or flight retransmission (if no buffering is used) as
 *                 means to deal with reordering are needed less frequently.
 *
 * \note           Application records are not affected by this option and
 *                 are currently always sent in separate datagrams.
 *
 */
void mbedtls_ssl_set_datagram_packing( mbedtls_ssl_context *ssl,
                                       unsigned allow_packing );

/**
 * \brief          Set retransmit timeout values for the DTLS handshake.
 *                 (DTLS only, no effect on TLS.)
 *
 * \param conf     SSL configuration
 * \param min      Initial timeout value in milliseconds.
 *                 Default: 1000 (1 second).
 * \param max      Maximum timeout value in milliseconds.
 *                 Default: 60000 (60 seconds).
 *
 * \note           Default values are from RFC 6347 section 4.2.4.1.
 *
 * \note           The 'min' value should typically be slightly above the
 *                 expected round-trip time to your peer, plus whatever time
 *                 it takes for the peer to process the message. For example,
 *                 if your RTT is about 600ms and you peer needs up to 1s to
 *                 do the cryptographic operations in the handshake, then you
 *                 should set 'min' slightly above 1600. Lower values of 'min'
 *                 might cause spurious resends which waste network resources,
 *                 while larger value of 'min' will increase overall latency
 *                 on unreliable network links.
 *
 * \note           The more unreliable your network connection is, the larger
 *                 your max / min ratio needs to be in order to achieve
 *                 reliable handshakes.
 *
 * \note           Messages are retransmitted up to log2(ceil(max/min)) times.
 *                 For example, if min = 1s and max = 5s, the retransmit plan
 *                 goes: send ... 1s -> resend ... 2s -> resend ... 4s ->
 *                 resend ... 5s -> give up and return a timeout error.
 */
void mbedtls_ssl_conf_handshake_timeout( mbedtls_ssl_config *conf, uint32_t min, uint32_t max );
#endif /* MBEDTLS_SSL_PROTO_DTLS */

#if defined(MBEDTLS_SSL_SRV_C)
/**
 * \brief          Set the session cache callbacks (server-side only)
 *                 If not set, no session resuming is done (except if session
 *                 tickets are enabled too).
 *
 *                 The session cache has the responsibility to check for stale
 *                 entries based on timeout. See RFC 5246 for recommendations.
 *
 *                 Warning: session.peer_cert is cleared by the SSL/TLS layer on
 *                 connection shutdown, so do not cache the pointer! Either set
 *                 it to NULL or make a full copy of the certificate.
 *
 *                 The get callback is called once during the initial handshake
 *                 to enable session resuming. The get function has the
 *                 following parameters: (void *parameter, mbedtls_ssl_session *session)
 *                 If a valid entry is found, it should fill the master of
 *                 the session object with the cached values and return 0,
 *                 return 1 otherwise. Optionally peer_cert can be set as well
 *                 if it is properly present in cache entry.
 *
 *                 The set callback is called once during the initial handshake
 *                 to enable session resuming after the entire handshake has
 *                 been finished. The set function has the following parameters:
 *                 (void *parameter, const mbedtls_ssl_session *session). The function
 *                 should create a cache entry for future retrieval based on
 *                 the data in the session structure and should keep in mind
 *                 that the mbedtls_ssl_session object presented (and all its referenced
 *                 data) is cleared by the SSL/TLS layer when the connection is
 *                 terminated. It is recommended to add metadata to determine if
 *                 an entry is still valid in the future. Return 0 if
 *                 successfully cached, return 1 otherwise.
 *
 * \param conf           SSL configuration
 * \param p_cache        parmater (context) for both callbacks
 * \param f_get_cache    session get callback
 * \param f_set_cache    session set callback
 */
void mbedtls_ssl_conf_session_cache( mbedtls_ssl_config *conf,
        void *p_cache,
        int (*f_get_cache)(void *, mbedtls_ssl_session *),
        int (*f_set_cache)(void *, const mbedtls_ssl_session *) );
#endif /* MBEDTLS_SSL_SRV_C */

#if defined(MBEDTLS_SSL_CLI_C)
/**
 * \brief          Request resumption of session (client-side only)
 *                 Session data is copied from presented session structure.
 *
 * \param ssl      SSL context
 * \param session  session context
 *
 * \return         0 if successful,
 *                 MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed,
 *                 MBEDTLS_ERR_SSL_BAD_INPUT_DATA if used server-side or
 *                 arguments are otherwise invalid
 *
 * \sa             mbedtls_ssl_get_session()
 */
int mbedtls_ssl_set_session( mbedtls_ssl_context *ssl, const mbedtls_ssl_session *session );
#endif /* MBEDTLS_SSL_CLI_C */

/**
 * \brief          Load serialized session data into a session structure.
 *                 On client, this can be used for loading saved sessions
 *                 before resuming them with mbedstls_ssl_set_session().
 *                 On server, this can be used for alternative implementations
 *                 of session cache or session tickets.
 *
 * \warning        If a peer certificate chain is associated with the session,
 *                 the serialized state will only contain the peer's
 *                 end-entity certificate and the result of the chain
 *                 verification (unless verification was disabled), but not
 *                 the rest of the chain.
 *
 * \see            mbedtls_ssl_session_save()
 * \see            mbedtls_ssl_set_session()
 *
 * \param session  The session structure to be populated. It must have been
 *                 initialised with mbedtls_ssl_session_init() but not
 *                 populated yet.
 * \param buf      The buffer holding the serialized session data. It must be a
 *                 readable buffer of at least \p len bytes.
 * \param len      The size of the serialized data in bytes.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed.
 * \return         #MBEDTLS_ERR_SSL_BAD_INPUT_DATA if input data is invalid.
 * \return         #MBEDTLS_ERR_SSL_VERSION_MISMATCH if the serialized data
 *                 was generated in a different version or configuration of
 *                 Mbed TLS.
 * \return         Another negative value for other kinds of errors (for
 *                 example, unsupported features in the embedded certificate).
 */
int mbedtls_ssl_session_load( mbedtls_ssl_session *session,
                              const unsigned char *buf,
                              size_t len );

/**
 * \brief          Save session structure as serialized data in a buffer.
 *                 On client, this can be used for saving session data,
 *                 potentially in non-volatile storage, for resuming later.
 *                 On server, this can be used for alternative implementations
 *                 of session cache or session tickets.
 *
 * \see            mbedtls_ssl_session_load()
 * \see            mbedtls_ssl_get_session_pointer()
 *
 * \param session  The session structure to be saved.
 * \param buf      The buffer to write the serialized data to. It must be a
 *                 writeable buffer of at least \p len bytes, or may be \c
 *                 NULL if \p len is \c 0.
 * \param buf_len  The number of bytes available for writing in \p buf.
 * \param olen     The size in bytes of the data that has been or would have
 *                 been written. It must point to a valid \c size_t.
 *
 * \note           \p olen is updated to the correct value regardless of
 *                 whether \p buf_len was large enough. This makes it possible
 *                 to determine the necessary size by calling this function
 *                 with \p buf set to \c NULL and \p buf_len to \c 0.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL if \p buf is too small.
 */
int mbedtls_ssl_session_save( const mbedtls_ssl_session *session,
                              unsigned char *buf,
                              size_t buf_len,
                              size_t *olen );

/**
 * \brief          Get a pointer to the current session structure, for example
 *                 to serialize it.
 *
 * \warning        Ownership of the session remains with the SSL context, and
 *                 the returned pointer is only guaranteed to be valid until
 *                 the next API call operating on the same \p ssl context.
 *
 * \see            mbedtls_ssl_session_save()
 *
 * \param ssl      The SSL context.
 *
 * \return         A pointer to the current session if successful.
 * \return         \c NULL if no session is active.
 */
const mbedtls_ssl_session *mbedtls_ssl_get_session_pointer( const mbedtls_ssl_context *ssl );

/**
 * \brief               Set the list of allowed ciphersuites and the preference
 *                      order. First in the list has the highest preference.
 *                      (Overrides all version-specific lists)
 *
 *                      The ciphersuites array is not copied, and must remain
 *                      valid for the lifetime of the ssl_config.
 *
 *                      Note: The server uses its own preferences
 *                      over the preference of the client unless
 *                      MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE is defined!
 *
 * \param conf          SSL configuration
 * \param ciphersuites  0-terminated list of allowed ciphersuites
 */
void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf,
                                   const int *ciphersuites );

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
#define MBEDTLS_SSL_UNEXPECTED_CID_IGNORE 0
#define MBEDTLS_SSL_UNEXPECTED_CID_FAIL   1
/**
 * \brief               Specify the length of Connection IDs for incoming
 *                      encrypted DTLS records, as well as the behaviour
 *                      on unexpected CIDs.
 *
 *                      By default, the CID length is set to \c 0,
 *                      and unexpected CIDs are silently ignored.
 *
 * \param conf          The SSL configuration to modify.
 * \param len           The length in Bytes of the CID fields in encrypted
 *                      DTLS records using the CID mechanism. This must
 *                      not be larger than #MBEDTLS_SSL_CID_OUT_LEN_MAX.
 * \param ignore_other_cids This determines the stack's behaviour when
 *                          receiving a record with an unexpected CID.
 *                          Possible values are:
 *                          - #MBEDTLS_SSL_UNEXPECTED_CID_IGNORE
 *                            In this case, the record is silently ignored.
 *                          - #MBEDTLS_SSL_UNEXPECTED_CID_FAIL
 *                            In this case, the stack fails with the specific
 *                            error code #MBEDTLS_ERR_SSL_UNEXPECTED_CID.
 *
 * \note                The CID specification allows implementations to either
 *                      use a common length for all incoming connection IDs or
 *                      allow variable-length incoming IDs. Mbed TLS currently
 *                      requires a common length for all connections sharing the
 *                      same SSL configuration; this allows simpler parsing of
 *                      record headers.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_SSL_BAD_INPUT_DATA if \p own_cid_len
 *                      is too large.
 */
int mbedtls_ssl_conf_cid( mbedtls_ssl_config *conf, size_t len,
                          int ignore_other_cids );
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */

/**
 * \brief               Set the list of allowed ciphersuites and the
 *                      preference order for a specific version of the protocol.
 *                      (Only useful on the server side)
 *
 *                      The ciphersuites array is not copied, and must remain
 *                      valid for the lifetime of the ssl_config.
 *
 * \param conf          SSL configuration
 * \param ciphersuites  0-terminated list of allowed ciphersuites
 * \param major         Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3
 *                      supported)
 * \param minor         Minor version number (MBEDTLS_SSL_MINOR_VERSION_0,
 *                      MBEDTLS_SSL_MINOR_VERSION_1 and MBEDTLS_SSL_MINOR_VERSION_2,
 *                      MBEDTLS_SSL_MINOR_VERSION_3 supported)
 *
 * \note                With DTLS, use MBEDTLS_SSL_MINOR_VERSION_2 for DTLS 1.0
 *                      and MBEDTLS_SSL_MINOR_VERSION_3 for DTLS 1.2
 */
void mbedtls_ssl_conf_ciphersuites_for_version( mbedtls_ssl_config *conf,
                                       const int *ciphersuites,
                                       int major, int minor );

#if defined(MBEDTLS_X509_CRT_PARSE_C)
/**
 * \brief          Set the X.509 security profile used for verification
 *
 * \note           The restrictions are enforced for all certificates in the
 *                 chain. However, signatures in the handshake are not covered
 *                 by this setting but by \b mbedtls_ssl_conf_sig_hashes().
 *
 * \param conf     SSL configuration
 * \param profile  Profile to use
 */
void mbedtls_ssl_conf_cert_profile( mbedtls_ssl_config *conf,
                                    const mbedtls_x509_crt_profile *profile );

/**
 * \brief          Set the data required to verify peer certificate
 *
 * \note           See \c mbedtls_x509_crt_verify() for notes regarding the
 *                 parameters ca_chain (maps to trust_ca for that function)
 *                 and ca_crl.
 *
 * \param conf     SSL configuration
 * \param ca_chain trusted CA chain (meaning all fully trusted top-level CAs)
 * \param ca_crl   trusted CA CRLs
 */
void mbedtls_ssl_conf_ca_chain( mbedtls_ssl_config *conf,
                               mbedtls_x509_crt *ca_chain,
                               mbedtls_x509_crl *ca_crl );

#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
/**
 * \brief          Set the trusted certificate callback.
 *
 *                 This API allows to register the set of trusted certificates
 *                 through a callback, instead of a linked list as configured
 *                 by mbedtls_ssl_conf_ca_chain().
 *
 *                 This is useful for example in contexts where a large number
 *                 of CAs are used, and the inefficiency of maintaining them
 *                 in a linked list cannot be tolerated. It is also useful when
 *                 the set of trusted CAs needs to be modified frequently.
 *
 *                 See the documentation of `mbedtls_x509_crt_ca_cb_t` for
 *                 more information.
 *
 * \param conf     The SSL configuration to register the callback with.
 * \param f_ca_cb  The trusted certificate callback to use when verifying
 *                 certificate chains.
 * \param p_ca_cb  The context to be passed to \p f_ca_cb (for example,
 *                 a reference to a trusted CA database).
 *
 * \note           This API is incompatible with mbedtls_ssl_conf_ca_chain():
 *                 Any call to this function overwrites the values set through
 *                 earlier calls to mbedtls_ssl_conf_ca_chain() or
 *                 mbedtls_ssl_conf_ca_cb().
 *
 * \note           This API is incompatible with CA indication in
 *                 CertificateRequest messages: A server-side SSL context which
 *                 is bound to an SSL configuration that uses a CA callback
 *                 configured via mbedtls_ssl_conf_ca_cb(), and which requires
 *                 client authentication, will send an empty CA list in the
 *                 corresponding CertificateRequest message.
 *
 * \note           This API is incompatible with mbedtls_ssl_set_hs_ca_chain():
 *                 If an SSL context is bound to an SSL configuration which uses
 *                 CA callbacks configured via mbedtls_ssl_conf_ca_cb(), then
 *                 calls to mbedtls_ssl_set_hs_ca_chain() have no effect.
 *
 * \note           The use of this API disables the use of restartable ECC
 *                 during X.509 CRT signature verification (but doesn't affect
 *                 other uses).
 *
 * \warning        This API is incompatible with the use of CRLs. Any call to
 *                 mbedtls_ssl_conf_ca_cb() unsets CRLs configured through
 *                 earlier calls to mbedtls_ssl_conf_ca_chain().
 *
 * \warning        In multi-threaded environments, the callback \p f_ca_cb
 *                 must be thread-safe, and it is the user's responsibility
 *                 to guarantee this (for example through a mutex
 *                 contained in the callback context pointed to by \p p_ca_cb).
 */
void mbedtls_ssl_conf_ca_cb( mbedtls_ssl_config *conf,
                             mbedtls_x509_crt_ca_cb_t f_ca_cb,
                             void *p_ca_cb );
#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */

/**
 * \brief          Set own certificate chain and private key
 *
 * \note           own_cert should contain in order from the bottom up your
 *                 certificate chain. The top certificate (self-signed)
 *                 can be omitted.
 *
 * \note           On server, this function can be called multiple times to
 *                 provision more than one cert/key pair (eg one ECDSA, one
 *                 RSA with SHA-256, one RSA with SHA-1). An adequate
 *                 certificate will be selected according to the client's
 *                 advertised capabilities. In case multiple certificates are
 *                 adequate, preference is given to the one set by the first
 *                 call to this function, then second, etc.
 *
 * \note           On client, only the first call has any effect. That is,
 *                 only one client certificate can be provisioned. The
 *                 server's preferences in its CertficateRequest message will
 *                 be ignored and our only cert will be sent regardless of
 *                 whether it matches those preferences - the server can then
 *                 decide what it wants to do with it.
 *
 * \note           The provided \p pk_key needs to match the public key in the
 *                 first certificate in \p own_cert, or all handshakes using
 *                 that certificate will fail. It is your responsibility
 *                 to ensure that; this function will not perform any check.
 *                 You may use mbedtls_pk_check_pair() in order to perform
 *                 this check yourself, but be aware that this function can
 *                 be computationally expensive on some key types.
 *
 * \param conf     SSL configuration
 * \param own_cert own public certificate chain
 * \param pk_key   own private key
 *
 * \return         0 on success or MBEDTLS_ERR_SSL_ALLOC_FAILED
 */
int mbedtls_ssl_conf_own_cert( mbedtls_ssl_config *conf,
                              mbedtls_x509_crt *own_cert,
                              mbedtls_pk_context *pk_key );
#endif /* MBEDTLS_X509_CRT_PARSE_C */

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
/**
 * \brief          Configure a pre-shared key (PSK) and identity
 *                 to be used in PSK-based ciphersuites.
 *
 * \note           This is mainly useful for clients. Servers will usually
 *                 want to use \c mbedtls_ssl_conf_psk_cb() instead.
 *
 * \note           A PSK set by \c mbedtls_ssl_set_hs_psk() in the PSK callback
 *                 takes precedence over a PSK configured by this function.
 *
 * \warning        Currently, clients can only register a single pre-shared key.
 *                 Calling this function or mbedtls_ssl_conf_psk_opaque() more
 *                 than once will overwrite values configured in previous calls.
 *                 Support for setting multiple PSKs on clients and selecting
 *                 one based on the identity hint is not a planned feature,
 *                 but feedback is welcomed.
 *
 * \param conf     The SSL configuration to register the PSK with.
 * \param psk      The pointer to the pre-shared key to use.
 * \param psk_len  The length of the pre-shared key in bytes.
 * \param psk_identity      The pointer to the pre-shared key identity.
 * \param psk_identity_len  The length of the pre-shared key identity
 *                          in bytes.
 *
 * \note           The PSK and its identity are copied internally and
 *                 hence need not be preserved by the caller for the lifetime
 *                 of the SSL configuration.
 *
 * \return         \c 0 if successful.
 * \return         An \c MBEDTLS_ERR_SSL_XXX error code on failure.
 */
int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf,
                const unsigned char *psk, size_t psk_len,
                const unsigned char *psk_identity, size_t psk_identity_len );

#if defined(MBEDTLS_USE_PSA_CRYPTO)
/**
 * \brief          Configure an opaque pre-shared key (PSK) and identity
 *                 to be used in PSK-based ciphersuites.
 *
 * \note           This is mainly useful for clients. Servers will usually
 *                 want to use \c mbedtls_ssl_conf_psk_cb() instead.
 *
 * \note           An opaque PSK set by \c mbedtls_ssl_set_hs_psk_opaque() in
 *                 the PSK callback takes precedence over an opaque PSK
 *                 configured by this function.
 *
 * \warning        Currently, clients can only register a single pre-shared key.
 *                 Calling this function or mbedtls_ssl_conf_psk() more than
 *                 once will overwrite values configured in previous calls.
 *                 Support for setting multiple PSKs on clients and selecting
 *                 one based on the identity hint is not a planned feature,
 *                 but feedback is welcomed.
 *
 * \param conf     The SSL configuration to register the PSK with.
 * \param psk      The identifier of the key slot holding the PSK.
 *                 Until \p conf is destroyed or this function is successfully
 *                 called again, the key slot \p psk must be populated with a
 *                 key of type PSA_ALG_CATEGORY_KEY_DERIVATION whose policy
 *                 allows its use for the key derivation algorithm applied
 *                 in the handshake.
 * \param psk_identity      The pointer to the pre-shared key identity.
 * \param psk_identity_len  The length of the pre-shared key identity
 *                          in bytes.
 *
 * \note           The PSK identity hint is copied internally and hence need
 *                 not be preserved by the caller for the lifetime of the
 *                 SSL configuration.
 *
 * \return         \c 0 if successful.
 * \return         An \c MBEDTLS_ERR_SSL_XXX error code on failure.
 */
int mbedtls_ssl_conf_psk_opaque( mbedtls_ssl_config *conf,
                                 psa_key_id_t psk,
                                 const unsigned char *psk_identity,
                                 size_t psk_identity_len );
#endif /* MBEDTLS_USE_PSA_CRYPTO */

/**
 * \brief          Set the pre-shared Key (PSK) for the current handshake.
 *
 * \note           This should only be called inside the PSK callback,
 *                 i.e. the function passed to \c mbedtls_ssl_conf_psk_cb().
 *
 * \note           A PSK set by this function takes precedence over a PSK
 *                 configured by \c mbedtls_ssl_conf_psk().
 *
 * \param ssl      The SSL context to configure a PSK for.
 * \param psk      The pointer to the pre-shared key.
 * \param psk_len  The length of the pre-shared key in bytes.
 *
 * \return         \c 0 if successful.
 * \return         An \c MBEDTLS_ERR_SSL_XXX error code on failure.
 */
int mbedtls_ssl_set_hs_psk( mbedtls_ssl_context *ssl,
                            const unsigned char *psk, size_t psk_len );

#if defined(MBEDTLS_USE_PSA_CRYPTO)
/**
 * \brief          Set an opaque pre-shared Key (PSK) for the current handshake.
 *
 * \note           This should only be called inside the PSK callback,
 *                 i.e. the function passed to \c mbedtls_ssl_conf_psk_cb().
 *
 * \note           An opaque PSK set by this function takes precedence over an
 *                 opaque PSK configured by \c mbedtls_ssl_conf_psk_opaque().
 *
 * \param ssl      The SSL context to configure a PSK for.
 * \param psk      The identifier of the key slot holding the PSK.
 *                 For the duration of the current handshake, the key slot
 *                 must be populated with a key of type
 *                 PSA_ALG_CATEGORY_KEY_DERIVATION whose policy allows its
 *                 use for the key derivation algorithm
 *                 applied in the handshake.
  *
 * \return         \c 0 if successful.
 * \return         An \c MBEDTLS_ERR_SSL_XXX error code on failure.
 */
int mbedtls_ssl_set_hs_psk_opaque( mbedtls_ssl_context *ssl,
                                   psa_key_id_t psk );
#endif /* MBEDTLS_USE_PSA_CRYPTO */

/**
 * \brief          Set the PSK callback (server-side only).
 *
 *                 If set, the PSK callback is called for each
 *                 handshake where a PSK-based ciphersuite was negotiated.
 *                 The caller provides the identity received and wants to
 *                 receive the actual PSK data and length.
 *
 *                 The callback has the following parameters:
 *                 - \c void*: The opaque pointer \p p_psk.
 *                 - \c mbedtls_ssl_context*: The SSL context to which
 *                                            the operation applies.
 *                 - \c const unsigned char*: The PSK identity
 *                                            selected by the client.
 *                 - \c size_t: The length of the PSK identity
 *                              selected by the client.
 *
 *                 If a valid PSK identity is found, the callback should use
 *                 \c mbedtls_ssl_set_hs_psk() or
 *                 \c mbedtls_ssl_set_hs_psk_opaque()
 *                 on the SSL context to set the correct PSK and return \c 0.
 *                 Any other return value will result in a denied PSK identity.
 *
 * \note           A dynamic PSK (i.e. set by the PSK callback) takes
 *                 precedence over a static PSK (i.e. set by
 *                 \c mbedtls_ssl_conf_psk() or
 *                 \c mbedtls_ssl_conf_psk_opaque()).
 *                 This means that if you set a PSK callback using this
 *                 function, you don't need to set a PSK using
 *                 \c mbedtls_ssl_conf_psk() or
 *                 \c mbedtls_ssl_conf_psk_opaque()).
 *
 * \param conf     The SSL configuration to register the callback with.
 * \param f_psk    The callback for selecting and setting the PSK based
 *                 in the PSK identity chosen by the client.
 * \param p_psk    A pointer to an opaque structure to be passed to
 *                 the callback, for example a PSK store.
 */
void mbedtls_ssl_conf_psk_cb( mbedtls_ssl_config *conf,
                     int (*f_psk)(void *, mbedtls_ssl_context *, const unsigned char *,
                                  size_t),
                     void *p_psk );
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */

#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)

#if !defined(MBEDTLS_DEPRECATED_REMOVED)

#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif

/**
 * \brief          Set the Diffie-Hellman public P and G values,
 *                 read as hexadecimal strings (server-side only)
 *                 (Default values: MBEDTLS_DHM_RFC3526_MODP_2048_[PG])
 *
 * \param conf     SSL configuration
 * \param dhm_P    Diffie-Hellman-Merkle modulus
 * \param dhm_G    Diffie-Hellman-Merkle generator
 *
 * \deprecated     Superseded by \c mbedtls_ssl_conf_dh_param_bin.
 *
 * \return         0 if successful
 */
MBEDTLS_DEPRECATED int mbedtls_ssl_conf_dh_param( mbedtls_ssl_config *conf,
                                                  const char *dhm_P,
                                                  const char *dhm_G );

#endif /* MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          Set the Diffie-Hellman public P and G values
 *                 from big-endian binary presentations.
 *                 (Default values: MBEDTLS_DHM_RFC3526_MODP_2048_[PG]_BIN)
 *
 * \param conf     SSL configuration
 * \param dhm_P    Diffie-Hellman-Merkle modulus in big-endian binary form
 * \param P_len    Length of DHM modulus
 * \param dhm_G    Diffie-Hellman-Merkle generator in big-endian binary form
 * \param G_len    Length of DHM generator
 *
 * \return         0 if successful
 */
int mbedtls_ssl_conf_dh_param_bin( mbedtls_ssl_config *conf,
                                   const unsigned char *dhm_P, size_t P_len,
                                   const unsigned char *dhm_G,  size_t G_len );

/**
 * \brief          Set the Diffie-Hellman public P and G values,
 *                 read from existing context (server-side only)
 *
 * \param conf     SSL configuration
 * \param dhm_ctx  Diffie-Hellman-Merkle context
 *
 * \return         0 if successful
 */
int mbedtls_ssl_conf_dh_param_ctx( mbedtls_ssl_config *conf, mbedtls_dhm_context *dhm_ctx );
#endif /* MBEDTLS_DHM_C && defined(MBEDTLS_SSL_SRV_C) */

#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
/**
 * \brief          Set the minimum length for Diffie-Hellman parameters.
 *                 (Client-side only.)
 *                 (Default: 1024 bits.)
 *
 * \param conf     SSL configuration
 * \param bitlen   Minimum bit length of the DHM prime
 */
void mbedtls_ssl_conf_dhm_min_bitlen( mbedtls_ssl_config *conf,
                                      unsigned int bitlen );
#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_CLI_C */

#if defined(MBEDTLS_ECP_C)
/**
 * \brief          Set the allowed curves in order of preference.
 *                 (Default: all defined curves in order of decreasing size,
 *                 except that Montgomery curves come last. This order
 *                 is likely to change in a future version.)
 *
 *                 On server: this only affects selection of the ECDHE curve;
 *                 the curves used for ECDH and ECDSA are determined by the
 *                 list of available certificates instead.
 *
 *                 On client: this affects the list of curves offered for any
 *                 use. The server can override our preference order.
 *
 *                 Both sides: limits the set of curves accepted for use in
 *                 ECDHE and in the peer's end-entity certificate.
 *
 * \note           This has no influence on which curves are allowed inside the
 *                 certificate chains, see \c mbedtls_ssl_conf_cert_profile()
 *                 for that. For the end-entity certificate however, the key
 *                 will be accepted only if it is allowed both by this list
 *                 and by the cert profile.
 *
 * \note           This list should be ordered by decreasing preference
 *                 (preferred curve first).
 *
 * \param conf     SSL configuration
 * \param curves   Ordered list of allowed curves,
 *                 terminated by MBEDTLS_ECP_DP_NONE.
 */
void mbedtls_ssl_conf_curves( mbedtls_ssl_config *conf,
                              const mbedtls_ecp_group_id *curves );
#endif /* MBEDTLS_ECP_C */

#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
/**
 * \brief          Set the allowed hashes for signatures during the handshake.
 *                 (Default: all SHA-2 hashes, largest first. Also SHA-1 if
 *                 the compile-time option
 *                 `MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE` is enabled.)
 *
 * \note           This only affects which hashes are offered and can be used
 *                 for signatures during the handshake. Hashes for message
 *                 authentication and the TLS PRF are controlled by the
 *                 ciphersuite, see \c mbedtls_ssl_conf_ciphersuites(). Hashes
 *                 used for certificate signature are controlled by the
 *                 verification profile, see \c mbedtls_ssl_conf_cert_profile().
 *
 * \note           This list should be ordered by decreasing preference
 *                 (preferred hash first).
 *
 * \param conf     SSL configuration
 * \param hashes   Ordered list of allowed signature hashes,
 *                 terminated by \c MBEDTLS_MD_NONE.
 */
void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
                                  const int *hashes );
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */

#if defined(MBEDTLS_X509_CRT_PARSE_C)
/**
 * \brief          Set or reset the hostname to check against the received
 *                 server certificate. It sets the ServerName TLS extension,
 *                 too, if that extension is enabled. (client-side only)
 *
 * \param ssl      SSL context
 * \param hostname the server hostname, may be NULL to clear hostname

 * \note           Maximum hostname length MBEDTLS_SSL_MAX_HOST_NAME_LEN.
 *
 * \return         0 if successful, MBEDTLS_ERR_SSL_ALLOC_FAILED on
 *                 allocation failure, MBEDTLS_ERR_SSL_BAD_INPUT_DATA on
 *                 too long input hostname.
 *
 *                 Hostname set to the one provided on success (cleared
 *                 when NULL). On allocation failure hostname is cleared.
 *                 On too long input failure, old hostname is unchanged.
 */
int mbedtls_ssl_set_hostname( mbedtls_ssl_context *ssl, const char *hostname );
#endif /* MBEDTLS_X509_CRT_PARSE_C */

#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
/**
 * \brief          Set own certificate and key for the current handshake
 *
 * \note           Same as \c mbedtls_ssl_conf_own_cert() but for use within
 *                 the SNI callback.
 *
 * \param ssl      SSL context
 * \param own_cert own public certificate chain
 * \param pk_key   own private key
 *
 * \return         0 on success or MBEDTLS_ERR_SSL_ALLOC_FAILED
 */
int mbedtls_ssl_set_hs_own_cert( mbedtls_ssl_context *ssl,
                                 mbedtls_x509_crt *own_cert,
                                 mbedtls_pk_context *pk_key );

/**
 * \brief          Set the data required to verify peer certificate for the
 *                 current handshake
 *
 * \note           Same as \c mbedtls_ssl_conf_ca_chain() but for use within
 *                 the SNI callback.
 *
 * \param ssl      SSL context
 * \param ca_chain trusted CA chain (meaning all fully trusted top-level CAs)
 * \param ca_crl   trusted CA CRLs
 */
void mbedtls_ssl_set_hs_ca_chain( mbedtls_ssl_context *ssl,
                                  mbedtls_x509_crt *ca_chain,
                                  mbedtls_x509_crl *ca_crl );

/**
 * \brief          Set authmode for the current handshake.
 *
 * \note           Same as \c mbedtls_ssl_conf_authmode() but for use within
 *                 the SNI callback.
 *
 * \param ssl      SSL context
 * \param authmode MBEDTLS_SSL_VERIFY_NONE, MBEDTLS_SSL_VERIFY_OPTIONAL or
 *                 MBEDTLS_SSL_VERIFY_REQUIRED
 */
void mbedtls_ssl_set_hs_authmode( mbedtls_ssl_context *ssl,
                                  int authmode );

/**
 * \brief          Set server side ServerName TLS extension callback
 *                 (optional, server-side only).
 *
 *                 If set, the ServerName callback is called whenever the
 *                 server receives a ServerName TLS extension from the client
 *                 during a handshake. The ServerName callback has the
 *                 following parameters: (void *parameter, mbedtls_ssl_context *ssl,
 *                 const unsigned char *hostname, size_t len). If a suitable
 *                 certificate is found, the callback must set the
 *                 certificate(s) and key(s) to use with \c
 *                 mbedtls_ssl_set_hs_own_cert() (can be called repeatedly),
 *                 and may optionally adjust the CA and associated CRL with \c
 *                 mbedtls_ssl_set_hs_ca_chain() as well as the client
 *                 authentication mode with \c mbedtls_ssl_set_hs_authmode(),
 *                 then must return 0. If no matching name is found, the
 *                 callback must either set a default cert, or
 *                 return non-zero to abort the handshake at this point.
 *
 * \param conf     SSL configuration
 * \param f_sni    verification function
 * \param p_sni    verification parameter
 */
void mbedtls_ssl_conf_sni( mbedtls_ssl_config *conf,
                  int (*f_sni)(void *, mbedtls_ssl_context *, const unsigned char *,
                               size_t),
                  void *p_sni );
#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */

#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
/**
 * \brief          Set the EC J-PAKE password for current handshake.
 *
 * \note           An internal copy is made, and destroyed as soon as the
 *                 handshake is completed, or when the SSL context is reset or
 *                 freed.
 *
 * \note           The SSL context needs to be already set up. The right place
 *                 to call this function is between \c mbedtls_ssl_setup() or
 *                 \c mbedtls_ssl_reset() and \c mbedtls_ssl_handshake().
 *
 * \param ssl      SSL context
 * \param pw       EC J-PAKE password (pre-shared secret)
 * \param pw_len   length of pw in bytes
 *
 * \return         0 on success, or a negative error code.
 */
int mbedtls_ssl_set_hs_ecjpake_password( mbedtls_ssl_context *ssl,
                                         const unsigned char *pw,
                                         size_t pw_len );
#endif /*MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */

#if defined(MBEDTLS_SSL_ALPN)
/**
 * \brief          Set the supported Application Layer Protocols.
 *
 * \param conf     SSL configuration
 * \param protos   Pointer to a NULL-terminated list of supported protocols,
 *                 in decreasing preference order. The pointer to the list is
 *                 recorded by the library for later reference as required, so
 *                 the lifetime of the table must be atleast as long as the
 *                 lifetime of the SSL configuration structure.
 *
 * \return         0 on success, or MBEDTLS_ERR_SSL_BAD_INPUT_DATA.
 */
int mbedtls_ssl_conf_alpn_protocols( mbedtls_ssl_config *conf, const char **protos );

/**
 * \brief          Get the name of the negotiated Application Layer Protocol.
 *                 This function should be called after the handshake is
 *                 completed.
 *
 * \param ssl      SSL context
 *
 * \return         Protcol name, or NULL if no protocol was negotiated.
 */
const char *mbedtls_ssl_get_alpn_protocol( const mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_SSL_ALPN */

#if defined(MBEDTLS_SSL_DTLS_SRTP)
#if defined(MBEDTLS_DEBUG_C)
static inline const char *mbedtls_ssl_get_srtp_profile_as_string( mbedtls_ssl_srtp_profile profile )
{
    switch( profile )
    {
        case MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_80:
            return( "MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_80" );
        case MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_32:
            return( "MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_32" );
        case MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_80:
            return( "MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_80" );
        case MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_32:
            return( "MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_32" );
        default: break;
    }
    return( "" );
}
#endif /* MBEDTLS_DEBUG_C */
/**
 * \brief                   Manage support for mki(master key id) value
 *                          in use_srtp extension.
 *                          MKI is an optional part of SRTP used for key management
 *                          and re-keying. See RFC3711 section 3.1 for details.
 *                          The default value is
 *                          #MBEDTLS_SSL_DTLS_SRTP_MKI_UNSUPPORTED.
 *
 * \param conf              The SSL configuration to manage mki support.
 * \param support_mki_value Enable or disable mki usage. Values are
 *                          #MBEDTLS_SSL_DTLS_SRTP_MKI_UNSUPPORTED
 *                          or #MBEDTLS_SSL_DTLS_SRTP_MKI_SUPPORTED.
 */
void mbedtls_ssl_conf_srtp_mki_value_supported( mbedtls_ssl_config *conf,
                                                int support_mki_value );

/**
 * \brief                   Set the supported DTLS-SRTP protection profiles.
 *
 * \param conf              SSL configuration
 * \param profiles          Pointer to a List of MBEDTLS_TLS_SRTP_UNSET terminated
 *                          supported protection profiles
 *                          in decreasing preference order.
 *                          The pointer to the list is recorded by the library
 *                          for later reference as required, so the lifetime
 *                          of the table must be at least as long as the lifetime
 *                          of the SSL configuration structure.
 *                          The list must not hold more than
 *                          MBEDTLS_TLS_SRTP_MAX_PROFILE_LIST_LENGTH elements
 *                          (excluding the terminating MBEDTLS_TLS_SRTP_UNSET).
 *
 * \return                  0 on success
 * \return                  #MBEDTLS_ERR_SSL_BAD_INPUT_DATA when the list of
 *                          protection profiles is incorrect.
 */
int mbedtls_ssl_conf_dtls_srtp_protection_profiles
                               ( mbedtls_ssl_config *conf,
                                 const mbedtls_ssl_srtp_profile *profiles );

/**
 * \brief                  Set the mki_value for the current DTLS-SRTP session.
 *
 * \param ssl              SSL context to use.
 * \param mki_value        The MKI value to set.
 * \param mki_len          The length of the MKI value.
 *
 * \note                   This function is relevant on client side only.
 *                         The server discovers the mki value during handshake.
 *                         A mki value set on server side using this function
 *                         is ignored.
 *
 * \return                 0 on success
 * \return                 #MBEDTLS_ERR_SSL_BAD_INPUT_DATA
 * \return                 #MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE
 */
int mbedtls_ssl_dtls_srtp_set_mki_value( mbedtls_ssl_context *ssl,
                                         unsigned char *mki_value,
                                         uint16_t mki_len );
/**
 * \brief                  Get the negotiated DTLS-SRTP informations:
 *                         Protection profile and MKI value.
 *
 * \warning                This function must be called after the handshake is
 *                         completed. The value returned by this function must
 *                         not be trusted or acted upon before the handshake completes.
 *
 * \param ssl              The SSL context to query.
 * \param dtls_srtp_info   The negotiated DTLS-SRTP informations:
 *                         - Protection profile in use.
 *                         A direct mapping of the iana defined value for protection
 *                         profile on an uint16_t.
                   http://www.iana.org/assignments/srtp-protection/srtp-protection.xhtml
 *                         #MBEDTLS_TLS_SRTP_UNSET if the use of SRTP was not negotiated
 *                         or peer's Hello packet was not parsed yet.
 *                         - mki size and value( if size is > 0 ).
 */
void mbedtls_ssl_get_dtls_srtp_negotiation_result( const mbedtls_ssl_context *ssl,
                                                   mbedtls_dtls_srtp_info *dtls_srtp_info );
#endif /* MBEDTLS_SSL_DTLS_SRTP */

/**
 * \brief          Set the maximum supported version sent from the client side
 *                 and/or accepted at the server side
 *                 (Default: MBEDTLS_SSL_MAX_MAJOR_VERSION, MBEDTLS_SSL_MAX_MINOR_VERSION)
 *
 * \note           This ignores ciphersuites from higher versions.
 *
 * \note           With DTLS, use MBEDTLS_SSL_MINOR_VERSION_2 for DTLS 1.0 and
 *                 MBEDTLS_SSL_MINOR_VERSION_3 for DTLS 1.2
 *
 * \param conf     SSL configuration
 * \param major    Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3 supported)
 * \param minor    Minor version number (MBEDTLS_SSL_MINOR_VERSION_0,
 *                 MBEDTLS_SSL_MINOR_VERSION_1 and MBEDTLS_SSL_MINOR_VERSION_2,
 *                 MBEDTLS_SSL_MINOR_VERSION_3 supported)
 */
void mbedtls_ssl_conf_max_version( mbedtls_ssl_config *conf, int major, int minor );

/**
 * \brief          Set the minimum accepted SSL/TLS protocol version
 *                 (Default: TLS 1.0)
 *
 * \note           Input outside of the SSL_MAX_XXXXX_VERSION and
 *                 SSL_MIN_XXXXX_VERSION range is ignored.
 *
 * \note           MBEDTLS_SSL_MINOR_VERSION_0 (SSL v3) should be avoided.
 *
 * \note           With DTLS, use MBEDTLS_SSL_MINOR_VERSION_2 for DTLS 1.0 and
 *                 MBEDTLS_SSL_MINOR_VERSION_3 for DTLS 1.2
 *
 * \param conf     SSL configuration
 * \param major    Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3 supported)
 * \param minor    Minor version number (MBEDTLS_SSL_MINOR_VERSION_0,
 *                 MBEDTLS_SSL_MINOR_VERSION_1 and MBEDTLS_SSL_MINOR_VERSION_2,
 *                 MBEDTLS_SSL_MINOR_VERSION_3 supported)
 */
void mbedtls_ssl_conf_min_version( mbedtls_ssl_config *conf, int major, int minor );

#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
/**
 * \brief          Set the fallback flag (client-side only).
 *                 (Default: MBEDTLS_SSL_IS_NOT_FALLBACK).
 *
 * \note           Set to MBEDTLS_SSL_IS_FALLBACK when preparing a fallback
 *                 connection, that is a connection with max_version set to a
 *                 lower value than the value you're willing to use. Such
 *                 fallback connections are not recommended but are sometimes
 *                 necessary to interoperate with buggy (version-intolerant)
 *                 servers.
 *
 * \warning        You should NOT set this to MBEDTLS_SSL_IS_FALLBACK for
 *                 non-fallback connections! This would appear to work for a
 *                 while, then cause failures when the server is upgraded to
 *                 support a newer TLS version.
 *
 * \param conf     SSL configuration
 * \param fallback MBEDTLS_SSL_IS_NOT_FALLBACK or MBEDTLS_SSL_IS_FALLBACK
 */
void mbedtls_ssl_conf_fallback( mbedtls_ssl_config *conf, char fallback );
#endif /* MBEDTLS_SSL_FALLBACK_SCSV && MBEDTLS_SSL_CLI_C */

#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
/**
 * \brief           Enable or disable Encrypt-then-MAC
 *                  (Default: MBEDTLS_SSL_ETM_ENABLED)
 *
 * \note            This should always be enabled, it is a security
 *                  improvement, and should not cause any interoperability
 *                  issue (used only if the peer supports it too).
 *
 * \param conf      SSL configuration
 * \param etm       MBEDTLS_SSL_ETM_ENABLED or MBEDTLS_SSL_ETM_DISABLED
 */
void mbedtls_ssl_conf_encrypt_then_mac( mbedtls_ssl_config *conf, char etm );
#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */

#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
/**
 * \brief           Enable or disable Extended Master Secret negotiation.
 *                  (Default: MBEDTLS_SSL_EXTENDED_MS_ENABLED)
 *
 * \note            This should always be enabled, it is a security fix to the
 *                  protocol, and should not cause any interoperability issue
 *                  (used only if the peer supports it too).
 *
 * \param conf      SSL configuration
 * \param ems       MBEDTLS_SSL_EXTENDED_MS_ENABLED or MBEDTLS_SSL_EXTENDED_MS_DISABLED
 */
void mbedtls_ssl_conf_extended_master_secret( mbedtls_ssl_config *conf, char ems );
#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */

#if defined(MBEDTLS_ARC4_C)
/**
 * \brief          Disable or enable support for RC4
 *                 (Default: MBEDTLS_SSL_ARC4_DISABLED)
 *
 * \warning        Use of RC4 in DTLS/TLS has been prohibited by RFC 7465
 *                 for security reasons. Use at your own risk.
 *
 * \note           This function is deprecated and will be removed in
 *                 a future version of the library.
 *                 RC4 is disabled by default at compile time and needs to be
 *                 actively enabled for use with legacy systems.
 *
 * \param conf     SSL configuration
 * \param arc4     MBEDTLS_SSL_ARC4_ENABLED or MBEDTLS_SSL_ARC4_DISABLED
 */
void mbedtls_ssl_conf_arc4_support( mbedtls_ssl_config *conf, char arc4 );
#endif /* MBEDTLS_ARC4_C */

#if defined(MBEDTLS_SSL_SRV_C)
/**
 * \brief          Whether to send a list of acceptable CAs in
 *                 CertificateRequest messages.
 *                 (Default: do send)
 *
 * \param conf     SSL configuration
 * \param cert_req_ca_list   MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED or
 *                          MBEDTLS_SSL_CERT_REQ_CA_LIST_DISABLED
 */
void mbedtls_ssl_conf_cert_req_ca_list( mbedtls_ssl_config *conf,
                                          char cert_req_ca_list );
#endif /* MBEDTLS_SSL_SRV_C */

#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
/**
 * \brief          Set the maximum fragment length to emit and/or negotiate.
 *                 (Typical: the smaller of #MBEDTLS_SSL_IN_CONTENT_LEN and
 *                 #MBEDTLS_SSL_OUT_CONTENT_LEN, usually `2^14` bytes)
 *                 (Server: set maximum fragment length to emit,
 *                 usually negotiated by the client during handshake)
 *                 (Client: set maximum fragment length to emit *and*
 *                 negotiate with the server during handshake)
 *                 (Default: #MBEDTLS_SSL_MAX_FRAG_LEN_NONE)
 *
 * \note           On the client side, the maximum fragment length extension
 *                 *will not* be used, unless the maximum fragment length has
 *                 been set via this function to a value different than
 *                 #MBEDTLS_SSL_MAX_FRAG_LEN_NONE.
 *
 * \note           With TLS, this currently only affects ApplicationData (sent
 *                 with \c mbedtls_ssl_read()), not handshake messages.
 *                 With DTLS, this affects both ApplicationData and handshake.
 *
 * \note           This sets the maximum length for a record's payload,
 *                 excluding record overhead that will be added to it, see
 *                 \c mbedtls_ssl_get_record_expansion().
 *
 * \note           For DTLS, it is also possible to set a limit for the total
 *                 size of daragrams passed to the transport layer, including
 *                 record overhead, see \c mbedtls_ssl_set_mtu().
 *
 * \param conf     SSL configuration
 * \param mfl_code Code for maximum fragment length (allowed values:
 *                 MBEDTLS_SSL_MAX_FRAG_LEN_512,  MBEDTLS_SSL_MAX_FRAG_LEN_1024,
 *                 MBEDTLS_SSL_MAX_FRAG_LEN_2048, MBEDTLS_SSL_MAX_FRAG_LEN_4096)
 *
 * \return         0 if successful or MBEDTLS_ERR_SSL_BAD_INPUT_DATA
 */
int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code );
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */

#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
/**
 * \brief          Activate negotiation of truncated HMAC
 *                 (Default: MBEDTLS_SSL_TRUNC_HMAC_DISABLED)
 *
 * \param conf     SSL configuration
 * \param truncate Enable or disable (MBEDTLS_SSL_TRUNC_HMAC_ENABLED or
 *                                    MBEDTLS_SSL_TRUNC_HMAC_DISABLED)
 */
void mbedtls_ssl_conf_truncated_hmac( mbedtls_ssl_config *conf, int truncate );
#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */

#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
/**
 * \brief          Enable / Disable 1/n-1 record splitting
 *                 (Default: MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED)
 *
 * \note           Only affects SSLv3 and TLS 1.0, not higher versions.
 *                 Does not affect non-CBC ciphersuites in any version.
 *
 * \param conf     SSL configuration
 * \param split    MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED or
 *                 MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED
 */
void mbedtls_ssl_conf_cbc_record_splitting( mbedtls_ssl_config *conf, char split );
#endif /* MBEDTLS_SSL_CBC_RECORD_SPLITTING */

#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
/**
 * \brief          Enable / Disable session tickets (client only).
 *                 (Default: MBEDTLS_SSL_SESSION_TICKETS_ENABLED.)
 *
 * \note           On server, use \c mbedtls_ssl_conf_session_tickets_cb().
 *
 * \param conf     SSL configuration
 * \param use_tickets   Enable or disable (MBEDTLS_SSL_SESSION_TICKETS_ENABLED or
 *                                         MBEDTLS_SSL_SESSION_TICKETS_DISABLED)
 */
void mbedtls_ssl_conf_session_tickets( mbedtls_ssl_config *conf, int use_tickets );
#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */

#if defined(MBEDTLS_SSL_RENEGOTIATION)
/**
 * \brief          Enable / Disable renegotiation support for connection when
 *                 initiated by peer
 *                 (Default: MBEDTLS_SSL_RENEGOTIATION_DISABLED)
 *
 * \warning        It is recommended to always disable renegotation unless you
 *                 know you need it and you know what you're doing. In the
 *                 past, there have been several issues associated with
 *                 renegotiation or a poor understanding of its properties.
 *
 * \note           Server-side, enabling renegotiation also makes the server
 *                 susceptible to a resource DoS by a malicious client.
 *
 * \param conf    SSL configuration
 * \param renegotiation     Enable or disable (MBEDTLS_SSL_RENEGOTIATION_ENABLED or
 *                                             MBEDTLS_SSL_RENEGOTIATION_DISABLED)
 */
void mbedtls_ssl_conf_renegotiation( mbedtls_ssl_config *conf, int renegotiation );
#endif /* MBEDTLS_SSL_RENEGOTIATION */

/**
 * \brief          Prevent or allow legacy renegotiation.
 *                 (Default: MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION)
 *
 *                 MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION allows connections to
 *                 be established even if the peer does not support
 *                 secure renegotiation, but does not allow renegotiation
 *                 to take place if not secure.
 *                 (Interoperable and secure option)
 *
 *                 MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION allows renegotiations
 *                 with non-upgraded peers. Allowing legacy renegotiation
 *                 makes the connection vulnerable to specific man in the
 *                 middle attacks. (See RFC 5746)
 *                 (Most interoperable and least secure option)
 *
 *                 MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE breaks off connections
 *                 if peer does not support secure renegotiation. Results
 *                 in interoperability issues with non-upgraded peers
 *                 that do not support renegotiation altogether.
 *                 (Most secure option, interoperability issues)
 *
 * \param conf     SSL configuration
 * \param allow_legacy  Prevent or allow (SSL_NO_LEGACY_RENEGOTIATION,
 *                                        SSL_ALLOW_LEGACY_RENEGOTIATION or
 *                                        MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE)
 */
void mbedtls_ssl_conf_legacy_renegotiation( mbedtls_ssl_config *conf, int allow_legacy );

#if defined(MBEDTLS_SSL_RENEGOTIATION)
/**
 * \brief          Enforce renegotiation requests.
 *                 (Default: enforced, max_records = 16)
 *
 *                 When we request a renegotiation, the peer can comply or
 *                 ignore the request. This function allows us to decide
 *                 whether to enforce our renegotiation requests by closing
 *                 the connection if the peer doesn't comply.
 *
 *                 However, records could already be in transit from the peer
 *                 when the request is emitted. In order to increase
 *                 reliability, we can accept a number of records before the
 *                 expected handshake records.
 *
 *                 The optimal value is highly dependent on the specific usage
 *                 scenario.
 *
 * \note           With DTLS and server-initiated renegotiation, the
 *                 HelloRequest is retransmited every time mbedtls_ssl_read() times
 *                 out or receives Application Data, until:
 *                 - max_records records have beens seen, if it is >= 0, or
 *                 - the number of retransmits that would happen during an
 *                 actual handshake has been reached.
 *                 Please remember the request might be lost a few times
 *                 if you consider setting max_records to a really low value.
 *
 * \warning        On client, the grace period can only happen during
 *                 mbedtls_ssl_read(), as opposed to mbedtls_ssl_write() and mbedtls_ssl_renegotiate()
 *                 which always behave as if max_record was 0. The reason is,
 *                 if we receive application data from the server, we need a
 *                 place to write it, which only happens during mbedtls_ssl_read().
 *
 * \param conf     SSL configuration
 * \param max_records Use MBEDTLS_SSL_RENEGOTIATION_NOT_ENFORCED if you don't want to
 *                 enforce renegotiation, or a non-negative value to enforce
 *                 it but allow for a grace period of max_records records.
 */
void mbedtls_ssl_conf_renegotiation_enforced( mbedtls_ssl_config *conf, int max_records );

/**
 * \brief          Set record counter threshold for periodic renegotiation.
 *                 (Default: 2^48 - 1)
 *
 *                 Renegotiation is automatically triggered when a record
 *                 counter (outgoing or incoming) crosses the defined
 *                 threshold. The default value is meant to prevent the
 *                 connection from being closed when the counter is about to
 *                 reached its maximal value (it is not allowed to wrap).
 *
 *                 Lower values can be used to enforce policies such as "keys
 *                 must be refreshed every N packets with cipher X".
 *
 *                 The renegotiation period can be disabled by setting
 *                 conf->disable_renegotiation to
 *                 MBEDTLS_SSL_RENEGOTIATION_DISABLED.
 *
 * \note           When the configured transport is
 *                 MBEDTLS_SSL_TRANSPORT_DATAGRAM the maximum renegotiation
 *                 period is 2^48 - 1, and for MBEDTLS_SSL_TRANSPORT_STREAM,
 *                 the maximum renegotiation period is 2^64 - 1.
 *
 * \param conf     SSL configuration
 * \param period   The threshold value: a big-endian 64-bit number.
 */
void mbedtls_ssl_conf_renegotiation_period( mbedtls_ssl_config *conf,
                                   const unsigned char period[8] );
#endif /* MBEDTLS_SSL_RENEGOTIATION */

/**
 * \brief          Check if there is data already read from the
 *                 underlying transport but not yet processed.
 *
 * \param ssl      SSL context
 *
 * \return         0 if nothing's pending, 1 otherwise.
 *
 * \note           This is different in purpose and behaviour from
 *                 \c mbedtls_ssl_get_bytes_avail in that it considers
 *                 any kind of unprocessed data, not only unread
 *                 application data. If \c mbedtls_ssl_get_bytes
 *                 returns a non-zero value, this function will
 *                 also signal pending data, but the converse does
 *                 not hold. For example, in DTLS there might be
 *                 further records waiting to be processed from
 *                 the current underlying transport's datagram.
 *
 * \note           If this function returns 1 (data pending), this
 *                 does not imply that a subsequent call to
 *                 \c mbedtls_ssl_read will provide any data;
 *                 e.g., the unprocessed data might turn out
 *                 to be an alert or a handshake message.
 *
 * \note           This function is useful in the following situation:
 *                 If the SSL/TLS module successfully returns from an
 *                 operation - e.g. a handshake or an application record
 *                 read - and you're awaiting incoming data next, you
 *                 must not immediately idle on the underlying transport
 *                 to have data ready, but you need to check the value
 *                 of this function first. The reason is that the desired
 *                 data might already be read but not yet processed.
 *                 If, in contrast, a previous call to the SSL/TLS module
 *                 returned MBEDTLS_ERR_SSL_WANT_READ, it is not necessary
 *                 to call this function, as the latter error code entails
 *                 that all internal data has been processed.
 *
 */
int mbedtls_ssl_check_pending( const mbedtls_ssl_context *ssl );

/**
 * \brief          Return the number of application data bytes
 *                 remaining to be read from the current record.
 *
 * \param ssl      SSL context
 *
 * \return         How many bytes are available in the application
 *                 data record read buffer.
 *
 * \note           When working over a datagram transport, this is
 *                 useful to detect the current datagram's boundary
 *                 in case \c mbedtls_ssl_read has written the maximal
 *                 amount of data fitting into the input buffer.
 *
 */
size_t mbedtls_ssl_get_bytes_avail( const mbedtls_ssl_context *ssl );

/**
 * \brief          Return the result of the certificate verification
 *
 * \param ssl      The SSL context to use.
 *
 * \return         \c 0 if the certificate verification was successful.
 * \return         \c -1u if the result is not available. This may happen
 *                 e.g. if the handshake aborts early, or a verification
 *                 callback returned a fatal error.
 * \return         A bitwise combination of \c MBEDTLS_X509_BADCERT_XXX
 *                 and \c MBEDTLS_X509_BADCRL_XXX failure flags; see x509.h.
 */
uint32_t mbedtls_ssl_get_verify_result( const mbedtls_ssl_context *ssl );

/**
 * \brief          Return the name of the current ciphersuite
 *
 * \param ssl      SSL context
 *
 * \return         a string containing the ciphersuite name
 */
const char *mbedtls_ssl_get_ciphersuite( const mbedtls_ssl_context *ssl );

/**
 * \brief          Return the current SSL version (SSLv3/TLSv1/etc)
 *
 * \param ssl      SSL context
 *
 * \return         a string containing the SSL version
 */
const char *mbedtls_ssl_get_version( const mbedtls_ssl_context *ssl );

/**
 * \brief          Return the (maximum) number of bytes added by the record
 *                 layer: header + encryption/MAC overhead (inc. padding)
 *
 * \note           This function is not available (always returns an error)
 *                 when record compression is enabled.
 *
 * \param ssl      SSL context
 *
 * \return         Current maximum record expansion in bytes, or
 *                 MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE if compression is
 *                 enabled, which makes expansion much less predictable
 */
int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl );

#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
/**
 * \brief          Return the maximum fragment length (payload, in bytes) for
 *                 the output buffer. For the client, this is the configured
 *                 value. For the server, it is the minimum of two - the
 *                 configured value and the negotiated one.
 *
 * \sa             mbedtls_ssl_conf_max_frag_len()
 * \sa             mbedtls_ssl_get_max_record_payload()
 *
 * \param ssl      SSL context
 *
 * \return         Current maximum fragment length for the output buffer.
 */
size_t mbedtls_ssl_get_output_max_frag_len( const mbedtls_ssl_context *ssl );

/**
 * \brief          Return the maximum fragment length (payload, in bytes) for
 *                 the input buffer. This is the negotiated maximum fragment
 *                 length, or, if there is none, MBEDTLS_SSL_MAX_CONTENT_LEN.
 *                 If it is not defined either, the value is 2^14. This function
 *                 works as its predecessor, \c mbedtls_ssl_get_max_frag_len().
 *
 * \sa             mbedtls_ssl_conf_max_frag_len()
 * \sa             mbedtls_ssl_get_max_record_payload()
 *
 * \param ssl      SSL context
 *
 * \return         Current maximum fragment length for the output buffer.
 */
size_t mbedtls_ssl_get_input_max_frag_len( const mbedtls_ssl_context *ssl );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)

#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif

/**
 * \brief          This function is a deprecated approach to getting the max
 *                 fragment length. Its an alias for
 *                 \c mbedtls_ssl_get_output_max_frag_len(), as the behaviour
 *                 is the same. See \c mbedtls_ssl_get_output_max_frag_len() for
 *                 more detail.
 *
 * \sa             mbedtls_ssl_get_input_max_frag_len()
 * \sa             mbedtls_ssl_get_output_max_frag_len()
 *
 * \param ssl      SSL context
 *
 * \return         Current maximum fragment length for the output buffer.
 */
MBEDTLS_DEPRECATED size_t mbedtls_ssl_get_max_frag_len(
                                        const mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */

/**
 * \brief          Return the current maximum outgoing record payload in bytes.
 *                 This takes into account the config.h setting \c
 *                 MBEDTLS_SSL_OUT_CONTENT_LEN, the configured and negotiated
 *                 max fragment length extension if used, and for DTLS the
 *                 path MTU as configured and current record expansion.
 *
 * \note           With DTLS, \c mbedtls_ssl_write() will return an error if
 *                 called with a larger length value.
 *                 With TLS, \c mbedtls_ssl_write() will fragment the input if
 *                 necessary and return the number of bytes written; it is up
 *                 to the caller to call \c mbedtls_ssl_write() again in
 *                 order to send the remaining bytes if any.
 *
 * \note           This function is not available (always returns an error)
 *                 when record compression is enabled.
 *
 * \sa             mbedtls_ssl_set_mtu()
 * \sa             mbedtls_ssl_get_output_max_frag_len()
 * \sa             mbedtls_ssl_get_input_max_frag_len()
 * \sa             mbedtls_ssl_get_record_expansion()
 *
 * \param ssl      SSL context
 *
 * \return         Current maximum payload for an outgoing record,
 *                 or a negative error code.
 */
int mbedtls_ssl_get_max_out_record_payload( const mbedtls_ssl_context *ssl );

#if defined(MBEDTLS_X509_CRT_PARSE_C)
/**
 * \brief          Return the peer certificate from the current connection.
 *
 * \param  ssl     The SSL context to use. This must be initialized and setup.
 *
 * \return         The current peer certificate, if available.
 *                 The returned certificate is owned by the SSL context and
 *                 is valid only until the next call to the SSL API.
 * \return         \c NULL if no peer certificate is available. This might
 *                 be because the chosen ciphersuite doesn't use CRTs
 *                 (PSK-based ciphersuites, for example), or because
 *                 #MBEDTLS_SSL_KEEP_PEER_CERTIFICATE has been disabled,
 *                 allowing the stack to free the peer's CRT to save memory.
 *
 * \note           For one-time inspection of the peer's certificate during
 *                 the handshake, consider registering an X.509 CRT verification
 *                 callback through mbedtls_ssl_conf_verify() instead of calling
 *                 this function. Using mbedtls_ssl_conf_verify() also comes at
 *                 the benefit of allowing you to influence the verification
 *                 process, for example by masking expected and tolerated
 *                 verification failures.
 *
 * \warning        You must not use the pointer returned by this function
 *                 after any further call to the SSL API, including
 *                 mbedtls_ssl_read() and mbedtls_ssl_write(); this is
 *                 because the pointer might change during renegotiation,
 *                 which happens transparently to the user.
 *                 If you want to use the certificate across API calls,
 *                 you must make a copy.
 */
const mbedtls_x509_crt *mbedtls_ssl_get_peer_cert( const mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_X509_CRT_PARSE_C */

#if defined(MBEDTLS_SSL_CLI_C)
/**
 * \brief          Save session in order to resume it later (client-side only)
 *                 Session data is copied to presented session structure.
 *
 *
 * \param ssl      SSL context
 * \param session  session context
 *
 * \return         0 if successful,
 *                 MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed,
 *                 MBEDTLS_ERR_SSL_BAD_INPUT_DATA if used server-side or
 *                 arguments are otherwise invalid.
 *
 * \note           Only the server certificate is copied, and not the full chain,
 *                 so you should not attempt to validate the certificate again
 *                 by calling \c mbedtls_x509_crt_verify() on it.
 *                 Instead, you should use the results from the verification
 *                 in the original handshake by calling \c mbedtls_ssl_get_verify_result()
 *                 after loading the session again into a new SSL context
 *                 using \c mbedtls_ssl_set_session().
 *
 * \note           Once the session object is not needed anymore, you should
 *                 free it by calling \c mbedtls_ssl_session_free().
 *
 * \sa             mbedtls_ssl_set_session()
 */
int mbedtls_ssl_get_session( const mbedtls_ssl_context *ssl, mbedtls_ssl_session *session );
#endif /* MBEDTLS_SSL_CLI_C */

/**
 * \brief          Perform the SSL handshake
 *
 * \param ssl      SSL context
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_SSL_WANT_READ or #MBEDTLS_ERR_SSL_WANT_WRITE
 *                 if the handshake is incomplete and waiting for data to
 *                 be available for reading from or writing to the underlying
 *                 transport - in this case you must call this function again
 *                 when the underlying transport is ready for the operation.
 * \return         #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS if an asynchronous
 *                 operation is in progress (see
 *                 mbedtls_ssl_conf_async_private_cb()) - in this case you
 *                 must call this function again when the operation is ready.
 * \return         #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS if a cryptographic
 *                 operation is in progress (see mbedtls_ecp_set_max_ops()) -
 *                 in this case you must call this function again to complete
 *                 the handshake when you're done attending other tasks.
 * \return         #MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED if DTLS is in use
 *                 and the client did not demonstrate reachability yet - in
 *                 this case you must stop using the context (see below).
 * \return         Another SSL error code - in this case you must stop using
 *                 the context (see below).
 *
 * \warning        If this function returns something other than
 *                 \c 0,
 *                 #MBEDTLS_ERR_SSL_WANT_READ,
 *                 #MBEDTLS_ERR_SSL_WANT_WRITE,
 *                 #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS or
 *                 #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS,
 *                 you must stop using the SSL context for reading or writing,
 *                 and either free it or call \c mbedtls_ssl_session_reset()
 *                 on it before re-using it for a new connection; the current
 *                 connection must be closed.
 *
 * \note           If DTLS is in use, then you may choose to handle
 *                 #MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED specially for logging
 *                 purposes, as it is an expected return value rather than an
 *                 actual error, but you still need to reset/free the context.
 *
 * \note           Remarks regarding event-driven DTLS:
 *                 If the function returns #MBEDTLS_ERR_SSL_WANT_READ, no datagram
 *                 from the underlying transport layer is currently being processed,
 *                 and it is safe to idle until the timer or the underlying transport
 *                 signal a new event. This is not true for a successful handshake,
 *                 in which case the datagram of the underlying transport that is
 *                 currently being processed might or might not contain further
 *                 DTLS records.
 */
int mbedtls_ssl_handshake( mbedtls_ssl_context *ssl );

/**
 * \brief          Perform a single step of the SSL handshake
 *
 * \note           The state of the context (ssl->state) will be at
 *                 the next state after this function returns \c 0. Do not
 *                 call this function if state is MBEDTLS_SSL_HANDSHAKE_OVER.
 *
 * \param ssl      SSL context
 *
 * \return         See mbedtls_ssl_handshake().
 *
 * \warning        If this function returns something other than \c 0,
 *                 #MBEDTLS_ERR_SSL_WANT_READ, #MBEDTLS_ERR_SSL_WANT_WRITE,
 *                 #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS or
 *                 #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS, you must stop using
 *                 the SSL context for reading or writing, and either free it
 *                 or call \c mbedtls_ssl_session_reset() on it before
 *                 re-using it for a new connection; the current connection
 *                 must be closed.
 */
int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl );

#if defined(MBEDTLS_SSL_RENEGOTIATION)
/**
 * \brief          Initiate an SSL renegotiation on the running connection.
 *                 Client: perform the renegotiation right now.
 *                 Server: request renegotiation, which will be performed
 *                 during the next call to mbedtls_ssl_read() if honored by
 *                 client.
 *
 * \param ssl      SSL context
 *
 * \return         0 if successful, or any mbedtls_ssl_handshake() return
 *                 value except #MBEDTLS_ERR_SSL_CLIENT_RECONNECT that can't
 *                 happen during a renegotiation.
 *
 * \warning        If this function returns something other than \c 0,
 *                 #MBEDTLS_ERR_SSL_WANT_READ, #MBEDTLS_ERR_SSL_WANT_WRITE,
 *                 #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS or
 *                 #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS, you must stop using
 *                 the SSL context for reading or writing, and either free it
 *                 or call \c mbedtls_ssl_session_reset() on it before
 *                 re-using it for a new connection; the current connection
 *                 must be closed.
 *
 */
int mbedtls_ssl_renegotiate( mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_SSL_RENEGOTIATION */

/**
 * \brief          Read at most 'len' application data bytes
 *
 * \param ssl      SSL context
 * \param buf      buffer that will hold the data
 * \param len      maximum number of bytes to read
 *
 * \return         The (positive) number of bytes read if successful.
 * \return         \c 0 if the read end of the underlying transport was closed
 *                 without sending a CloseNotify beforehand, which might happen
 *                 because of various reasons (internal error of an underlying
 *                 stack, non-conformant peer not sending a CloseNotify and
 *                 such) - in this case you must stop using the context
 *                 (see below).
 * \return         #MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY if the underlying
 *                 transport is still functional, but the peer has
 *                 acknowledged to not send anything anymore.
 * \return         #MBEDTLS_ERR_SSL_WANT_READ or #MBEDTLS_ERR_SSL_WANT_WRITE
 *                 if the handshake is incomplete and waiting for data to
 *                 be available for reading from or writing to the underlying
 *                 transport - in this case you must call this function again
 *                 when the underlying transport is ready for the operation.
 * \return         #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS if an asynchronous
 *                 operation is in progress (see
 *                 mbedtls_ssl_conf_async_private_cb()) - in this case you
 *                 must call this function again when the operation is ready.
 * \return         #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS if a cryptographic
 *                 operation is in progress (see mbedtls_ecp_set_max_ops()) -
 *                 in this case you must call this function again to complete
 *                 the handshake when you're done attending other tasks.
 * \return         #MBEDTLS_ERR_SSL_CLIENT_RECONNECT if we're at the server
 *                 side of a DTLS connection and the client is initiating a
 *                 new connection using the same source port. See below.
 * \return         Another SSL error code - in this case you must stop using
 *                 the context (see below).
 *
 * \warning        If this function returns something other than
 *                 a positive value,
 *                 #MBEDTLS_ERR_SSL_WANT_READ,
 *                 #MBEDTLS_ERR_SSL_WANT_WRITE,
 *                 #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS,
 *                 #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS or
 *                 #MBEDTLS_ERR_SSL_CLIENT_RECONNECT,
 *                 you must stop using the SSL context for reading or writing,
 *                 and either free it or call \c mbedtls_ssl_session_reset()
 *                 on it before re-using it for a new connection; the current
 *                 connection must be closed.
 *
 * \note           When this function returns #MBEDTLS_ERR_SSL_CLIENT_RECONNECT
 *                 (which can only happen server-side), it means that a client
 *                 is initiating a new connection using the same source port.
 *                 You can either treat that as a connection close and wait
 *                 for the client to resend a ClientHello, or directly
 *                 continue with \c mbedtls_ssl_handshake() with the same
 *                 context (as it has been reset internally). Either way, you
 *                 must make sure this is seen by the application as a new
 *                 connection: application state, if any, should be reset, and
 *                 most importantly the identity of the client must be checked
 *                 again. WARNING: not validating the identity of the client
 *                 again, or not transmitting the new identity to the
 *                 application layer, would allow authentication bypass!
 *
 * \note           Remarks regarding event-driven DTLS:
 *                 - If the function returns #MBEDTLS_ERR_SSL_WANT_READ, no datagram
 *                   from the underlying transport layer is currently being processed,
 *                   and it is safe to idle until the timer or the underlying transport
 *                   signal a new event.
 *                 - This function may return MBEDTLS_ERR_SSL_WANT_READ even if data was
 *                   initially available on the underlying transport, as this data may have
 *                   been only e.g. duplicated messages or a renegotiation request.
 *                   Therefore, you must be prepared to receive MBEDTLS_ERR_SSL_WANT_READ even
 *                   when reacting to an incoming-data event from the underlying transport.
 *                 - On success, the datagram of the underlying transport that is currently
 *                   being processed may contain further DTLS records. You should call
 *                   \c mbedtls_ssl_check_pending to check for remaining records.
 *
 */
int mbedtls_ssl_read( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len );

/**
 * \brief          Try to write exactly 'len' application data bytes
 *
 * \warning        This function will do partial writes in some cases. If the
 *                 return value is non-negative but less than length, the
 *                 function must be called again with updated arguments:
 *                 buf + ret, len - ret (if ret is the return value) until
 *                 it returns a value equal to the last 'len' argument.
 *
 * \param ssl      SSL context
 * \param buf      buffer holding the data
 * \param len      how many bytes must be written
 *
 * \return         The (non-negative) number of bytes actually written if
 *                 successful (may be less than \p len).
 * \return         #MBEDTLS_ERR_SSL_WANT_READ or #MBEDTLS_ERR_SSL_WANT_WRITE
 *                 if the handshake is incomplete and waiting for data to
 *                 be available for reading from or writing to the underlying
 *                 transport - in this case you must call this function again
 *                 when the underlying transport is ready for the operation.
 * \return         #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS if an asynchronous
 *                 operation is in progress (see
 *                 mbedtls_ssl_conf_async_private_cb()) - in this case you
 *                 must call this function again when the operation is ready.
 * \return         #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS if a cryptographic
 *                 operation is in progress (see mbedtls_ecp_set_max_ops()) -
 *                 in this case you must call this function again to complete
 *                 the handshake when you're done attending other tasks.
 * \return         Another SSL error code - in this case you must stop using
 *                 the context (see below).
 *
 * \warning        If this function returns something other than
 *                 a non-negative value,
 *                 #MBEDTLS_ERR_SSL_WANT_READ,
 *                 #MBEDTLS_ERR_SSL_WANT_WRITE,
 *                 #MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS or
 *                 #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS,
 *                 you must stop using the SSL context for reading or writing,
 *                 and either free it or call \c mbedtls_ssl_session_reset()
 *                 on it before re-using it for a new connection; the current
 *                 connection must be closed.
 *
 * \note           When this function returns #MBEDTLS_ERR_SSL_WANT_WRITE/READ,
 *                 it must be called later with the *same* arguments,
 *                 until it returns a value greater that or equal to 0. When
 *                 the function returns #MBEDTLS_ERR_SSL_WANT_WRITE there may be
 *                 some partial data in the output buffer, however this is not
 *                 yet sent.
 *
 * \note           If the requested length is greater than the maximum
 *                 fragment length (either the built-in limit or the one set
 *                 or negotiated with the peer), then:
 *                 - with TLS, less bytes than requested are written.
 *                 - with DTLS, MBEDTLS_ERR_SSL_BAD_INPUT_DATA is returned.
 *                 \c mbedtls_ssl_get_output_max_frag_len() may be used to
 *                 query the active maximum fragment length.
 *
 * \note           Attempting to write 0 bytes will result in an empty TLS
 *                 application record being sent.
 */
int mbedtls_ssl_write( mbedtls_ssl_context *ssl, const unsigned char *buf, size_t len );

/**
 * \brief           Send an alert message
 *
 * \param ssl       SSL context
 * \param level     The alert level of the message
 *                  (MBEDTLS_SSL_ALERT_LEVEL_WARNING or MBEDTLS_SSL_ALERT_LEVEL_FATAL)
 * \param message   The alert message (SSL_ALERT_MSG_*)
 *
 * \return          0 if successful, or a specific SSL error code.
 *
 * \note           If this function returns something other than 0 or
 *                 MBEDTLS_ERR_SSL_WANT_READ/WRITE, you must stop using
 *                 the SSL context for reading or writing, and either free it or
 *                 call \c mbedtls_ssl_session_reset() on it before re-using it
 *                 for a new connection; the current connection must be closed.
 */
int mbedtls_ssl_send_alert_message( mbedtls_ssl_context *ssl,
                            unsigned char level,
                            unsigned char message );
/**
 * \brief          Notify the peer that the connection is being closed
 *
 * \param ssl      SSL context
 *
 * \return          0 if successful, or a specific SSL error code.
 *
 * \note           If this function returns something other than 0 or
 *                 MBEDTLS_ERR_SSL_WANT_READ/WRITE, you must stop using
 *                 the SSL context for reading or writing, and either free it or
 *                 call \c mbedtls_ssl_session_reset() on it before re-using it
 *                 for a new connection; the current connection must be closed.
 */
int mbedtls_ssl_close_notify( mbedtls_ssl_context *ssl );

/**
 * \brief          Free referenced items in an SSL context and clear memory
 *
 * \param ssl      SSL context
 */
void mbedtls_ssl_free( mbedtls_ssl_context *ssl );

#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
/**
 * \brief          Save an active connection as serialized data in a buffer.
 *                 This allows the freeing or re-using of the SSL context
 *                 while still picking up the connection later in a way that
 *                 it entirely transparent to the peer.
 *
 * \see            mbedtls_ssl_context_load()
 *
 * \note           This feature is currently only available under certain
 *                 conditions, see the documentation of the return value
 *                 #MBEDTLS_ERR_SSL_BAD_INPUT_DATA for details.
 *
 * \note           When this function succeeds, it calls
 *                 mbedtls_ssl_session_reset() on \p ssl which as a result is
 *                 no longer associated with the connection that has been
 *                 serialized. This avoids creating copies of the connection
 *                 state. You're then free to either re-use the context
 *                 structure for a different connection, or call
 *                 mbedtls_ssl_free() on it. See the documentation of
 *                 mbedtls_ssl_session_reset() for more details.
 *
 * \param ssl      The SSL context to save. On success, it is no longer
 *                 associated with the connection that has been serialized.
 * \param buf      The buffer to write the serialized data to. It must be a
 *                 writeable buffer of at least \p buf_len bytes, or may be \c
 *                 NULL if \p buf_len is \c 0.
 * \param buf_len  The number of bytes available for writing in \p buf.
 * \param olen     The size in bytes of the data that has been or would have
 *                 been written. It must point to a valid \c size_t.
 *
 * \note           \p olen is updated to the correct value regardless of
 *                 whether \p buf_len was large enough. This makes it possible
 *                 to determine the necessary size by calling this function
 *                 with \p buf set to \c NULL and \p buf_len to \c 0. However,
 *                 the value of \p olen is only guaranteed to be correct when
 *                 the function returns #MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL or
 *                 \c 0. If the return value is different, then the value of
 *                 \p olen is undefined.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL if \p buf is too small.
 * \return         #MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed
 *                 while reseting the context.
 * \return         #MBEDTLS_ERR_SSL_BAD_INPUT_DATA if a handshake is in
 *                 progress, or there is pending data for reading or sending,
 *                 or the connection does not use DTLS 1.2 with an AEAD
 *                 ciphersuite, or renegotiation is enabled.
 */
int mbedtls_ssl_context_save( mbedtls_ssl_context *ssl,
                              unsigned char *buf,
                              size_t buf_len,
                              size_t *olen );

/**
 * \brief          Load serialized connection data to an SSL context.
 *
 * \see            mbedtls_ssl_context_save()
 *
 * \warning        The same serialized data must never be loaded into more
 *                 that one context. In order to ensure that, after
 *                 successfully loading serialized data to an SSL context, you
 *                 should immediately destroy or invalidate all copies of the
 *                 serialized data that was loaded. Loading the same data in
 *                 more than one context would cause severe security failures
 *                 including but not limited to loss of confidentiality.
 *
 * \note           Before calling this function, the SSL context must be
 *                 prepared in one of the two following ways. The first way is
 *                 to take a context freshly initialised with
 *                 mbedtls_ssl_init() and call mbedtls_ssl_setup() on it with
 *                 the same ::mbedtls_ssl_config structure that was used in
 *                 the original connection. The second way is to
 *                 call mbedtls_ssl_session_reset() on a context that was
 *                 previously prepared as above but used in the meantime.
 *                 Either way, you must not use the context to perform a
 *                 handshake between calling mbedtls_ssl_setup() or
 *                 mbedtls_ssl_session_reset() and calling this function. You
 *                 may however call other setter functions in that time frame
 *                 as indicated in the note below.
 *
 * \note           Before or after calling this function successfully, you
 *                 also need to configure some connection-specific callbacks
 *                 and settings before you can use the connection again
 *                 (unless they were already set before calling
 *                 mbedtls_ssl_session_reset() and the values are suitable for
 *                 the present connection). Specifically, you want to call
 *                 at least mbedtls_ssl_set_bio() and
 *                 mbedtls_ssl_set_timer_cb(). All other SSL setter functions
 *                 are not necessary to call, either because they're only used
 *                 in handshakes, or because the setting is already saved. You
 *                 might choose to call them anyway, for example in order to
 *                 share code between the cases of establishing a new
 *                 connection and the case of loading an already-established
 *                 connection.
 *
 * \note           If you have new information about the path MTU, you want to
 *                 call mbedtls_ssl_set_mtu() after calling this function, as
 *                 otherwise this function would overwrite your
 *                 newly-configured value with the value that was active when
 *                 the context was saved.
 *
 * \note           When this function returns an error code, it calls
 *                 mbedtls_ssl_free() on \p ssl. In this case, you need to
 *                 prepare the context with the usual sequence starting with a
 *                 call to mbedtls_ssl_init() if you want to use it again.
 *
 * \param ssl      The SSL context structure to be populated. It must have
 *                 been prepared as described in the note above.
 * \param buf      The buffer holding the serialized connection data. It must
 *                 be a readable buffer of at least \p len bytes.
 * \param len      The size of the serialized data in bytes.
 *
 * \return         \c 0 if successful.
 * \return         #MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed.
 * \return         #MBEDTLS_ERR_SSL_VERSION_MISMATCH if the serialized data
 *                 comes from a different Mbed TLS version or build.
 * \return         #MBEDTLS_ERR_SSL_BAD_INPUT_DATA if input data is invalid.
 */
int mbedtls_ssl_context_load( mbedtls_ssl_context *ssl,
                              const unsigned char *buf,
                              size_t len );
#endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */

/**
 * \brief          Initialize an SSL configuration context
 *                 Just makes the context ready for
 *                 mbedtls_ssl_config_defaults() or mbedtls_ssl_config_free().
 *
 * \note           You need to call mbedtls_ssl_config_defaults() unless you
 *                 manually set all of the relevant fields yourself.
 *
 * \param conf     SSL configuration context
 */
void mbedtls_ssl_config_init( mbedtls_ssl_config *conf );

/**
 * \brief          Load reasonnable default SSL configuration values.
 *                 (You need to call mbedtls_ssl_config_init() first.)
 *
 * \param conf     SSL configuration context
 * \param endpoint MBEDTLS_SSL_IS_CLIENT or MBEDTLS_SSL_IS_SERVER
 * \param transport MBEDTLS_SSL_TRANSPORT_STREAM for TLS, or
 *                  MBEDTLS_SSL_TRANSPORT_DATAGRAM for DTLS
 * \param preset   a MBEDTLS_SSL_PRESET_XXX value
 *
 * \note           See \c mbedtls_ssl_conf_transport() for notes on DTLS.
 *
 * \return         0 if successful, or
 *                 MBEDTLS_ERR_XXX_ALLOC_FAILED on memory allocation error.
 */
int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
                                 int endpoint, int transport, int preset );

/**
 * \brief          Free an SSL configuration context
 *
 * \param conf     SSL configuration context
 */
void mbedtls_ssl_config_free( mbedtls_ssl_config *conf );

/**
 * \brief          Initialize SSL session structure
 *
 * \param session  SSL session
 */
void mbedtls_ssl_session_init( mbedtls_ssl_session *session );

/**
 * \brief          Free referenced items in an SSL session including the
 *                 peer certificate and clear memory
 *
 * \note           A session object can be freed even if the SSL context
 *                 that was used to retrieve the session is still in use.
 *
 * \param session  SSL session
 */
void mbedtls_ssl_session_free( mbedtls_ssl_session *session );

/**
 * \brief          TLS-PRF function for key derivation.
 *
 * \param prf      The tls_prf type function type to be used.
 * \param secret   Secret for the key derivation function.
 * \param slen     Length of the secret.
 * \param label    String label for the key derivation function,
 *                 terminated with null character.
 * \param random   Random bytes.
 * \param rlen     Length of the random bytes buffer.
 * \param dstbuf   The buffer holding the derived key.
 * \param dlen     Length of the output buffer.
 *
 * \return         0 on success. An SSL specific error on failure.
 */
int  mbedtls_ssl_tls_prf( const mbedtls_tls_prf_types prf,
                          const unsigned char *secret, size_t slen,
                          const char *label,
                          const unsigned char *random, size_t rlen,
                          unsigned char *dstbuf, size_t dlen );

#ifdef __cplusplus
}
#endif

#endif /* ssl.h */


/********* Start of file include/mbedtls/ssl_cookie.h ************/

/**
 * \file ssl_cookie.h
 *
 * \brief DTLS cookie callbacks implementation
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SSL_COOKIE_H
#define MBEDTLS_SSL_COOKIE_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#if defined(MBEDTLS_THREADING_C)

#endif

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */
#ifndef MBEDTLS_SSL_COOKIE_TIMEOUT
#define MBEDTLS_SSL_COOKIE_TIMEOUT     60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
#endif

/* \} name SECTION: Module settings */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief          Context for the default cookie functions.
 */
typedef struct mbedtls_ssl_cookie_ctx
{
    mbedtls_md_context_t    hmac_ctx;   /*!< context for the HMAC portion   */
#if !defined(MBEDTLS_HAVE_TIME)
    unsigned long   serial;     /*!< serial number for expiration   */
#endif
    unsigned long   timeout;    /*!< timeout delay, in seconds if HAVE_TIME,
                                     or in number of tickets issued */

#if defined(MBEDTLS_THREADING_C)
    mbedtls_threading_mutex_t mutex;
#endif
} mbedtls_ssl_cookie_ctx;

/**
 * \brief          Initialize cookie context
 */
void mbedtls_ssl_cookie_init( mbedtls_ssl_cookie_ctx *ctx );

/**
 * \brief          Setup cookie context (generate keys)
 */
int mbedtls_ssl_cookie_setup( mbedtls_ssl_cookie_ctx *ctx,
                      int (*f_rng)(void *, unsigned char *, size_t),
                      void *p_rng );

/**
 * \brief          Set expiration delay for cookies
 *                 (Default MBEDTLS_SSL_COOKIE_TIMEOUT)
 *
 * \param ctx      Cookie contex
 * \param delay    Delay, in seconds if HAVE_TIME, or in number of cookies
 *                 issued in the meantime.
 *                 0 to disable expiration (NOT recommended)
 */
void mbedtls_ssl_cookie_set_timeout( mbedtls_ssl_cookie_ctx *ctx, unsigned long delay );

/**
 * \brief          Free cookie context
 */
void mbedtls_ssl_cookie_free( mbedtls_ssl_cookie_ctx *ctx );

/**
 * \brief          Generate cookie, see \c mbedtls_ssl_cookie_write_t
 */
mbedtls_ssl_cookie_write_t mbedtls_ssl_cookie_write;

/**
 * \brief          Verify cookie, see \c mbedtls_ssl_cookie_write_t
 */
mbedtls_ssl_cookie_check_t mbedtls_ssl_cookie_check;

#ifdef __cplusplus
}
#endif

#endif /* ssl_cookie.h */


/********* Start of file include/mbedtls/ssl_internal.h ************/

/**
 * \file ssl_internal.h
 *
 * \brief Internal functions shared by the SSL modules
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SSL_INTERNAL_H
#define MBEDTLS_SSL_INTERNAL_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif




#if defined(MBEDTLS_USE_PSA_CRYPTO)

#endif

#if defined(MBEDTLS_MD5_C)

#endif

#if defined(MBEDTLS_SHA1_C)

#endif

#if defined(MBEDTLS_SHA256_C)

#endif

#if defined(MBEDTLS_SHA512_C)

#endif

#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)

#endif

#if defined(MBEDTLS_USE_PSA_CRYPTO)


#endif /* MBEDTLS_USE_PSA_CRYPTO */

#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
    !defined(inline) && !defined(__cplusplus)
#define inline __inline
#endif

/* Determine minimum supported version */
#define MBEDTLS_SSL_MIN_MAJOR_VERSION           MBEDTLS_SSL_MAJOR_VERSION_3

#if defined(MBEDTLS_SSL_PROTO_SSL3)
#define MBEDTLS_SSL_MIN_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_0
#else
#if defined(MBEDTLS_SSL_PROTO_TLS1)
#define MBEDTLS_SSL_MIN_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_1
#else
#if defined(MBEDTLS_SSL_PROTO_TLS1_1)
#define MBEDTLS_SSL_MIN_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_2
#else
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#define MBEDTLS_SSL_MIN_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_3
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
#endif /* MBEDTLS_SSL_PROTO_TLS1_1 */
#endif /* MBEDTLS_SSL_PROTO_TLS1   */
#endif /* MBEDTLS_SSL_PROTO_SSL3   */

#define MBEDTLS_SSL_MIN_VALID_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_1
#define MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION MBEDTLS_SSL_MAJOR_VERSION_3

/* Determine maximum supported version */
#define MBEDTLS_SSL_MAX_MAJOR_VERSION           MBEDTLS_SSL_MAJOR_VERSION_3

#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#define MBEDTLS_SSL_MAX_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_3
#else
#if defined(MBEDTLS_SSL_PROTO_TLS1_1)
#define MBEDTLS_SSL_MAX_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_2
#else
#if defined(MBEDTLS_SSL_PROTO_TLS1)
#define MBEDTLS_SSL_MAX_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_1
#else
#if defined(MBEDTLS_SSL_PROTO_SSL3)
#define MBEDTLS_SSL_MAX_MINOR_VERSION           MBEDTLS_SSL_MINOR_VERSION_0
#endif /* MBEDTLS_SSL_PROTO_SSL3   */
#endif /* MBEDTLS_SSL_PROTO_TLS1   */
#endif /* MBEDTLS_SSL_PROTO_TLS1_1 */
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */

/* Shorthand for restartable ECC */
#if defined(MBEDTLS_ECP_RESTARTABLE) && \
    defined(MBEDTLS_SSL_CLI_C) && \
    defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
#define MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED
#endif

#define MBEDTLS_SSL_INITIAL_HANDSHAKE           0
#define MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS   1   /* In progress */
#define MBEDTLS_SSL_RENEGOTIATION_DONE          2   /* Done or aborted */
#define MBEDTLS_SSL_RENEGOTIATION_PENDING       3   /* Requested (server only) */

/*
 * DTLS retransmission states, see RFC 6347 4.2.4
 *
 * The SENDING state is merged in PREPARING for initial sends,
 * but is distinct for resends.
 *
 * Note: initial state is wrong for server, but is not used anyway.
 */
#define MBEDTLS_SSL_RETRANS_PREPARING       0
#define MBEDTLS_SSL_RETRANS_SENDING         1
#define MBEDTLS_SSL_RETRANS_WAITING         2
#define MBEDTLS_SSL_RETRANS_FINISHED        3

/*
 * Allow extra bytes for record, authentication and encryption overhead:
 * counter (8) + header (5) + IV(16) + MAC (16-48) + padding (0-256)
 * and allow for a maximum of 1024 of compression expansion if
 * enabled.
 */
#if defined(MBEDTLS_ZLIB_SUPPORT)
#define MBEDTLS_SSL_COMPRESSION_ADD          1024
#else
#define MBEDTLS_SSL_COMPRESSION_ADD             0
#endif

/* This macro determines whether CBC is supported. */
#if defined(MBEDTLS_CIPHER_MODE_CBC) &&                               \
    ( defined(MBEDTLS_AES_C)      ||                                  \
      defined(MBEDTLS_CAMELLIA_C) ||                                  \
      defined(MBEDTLS_ARIA_C)     ||                                  \
      defined(MBEDTLS_DES_C) )
#define MBEDTLS_SSL_SOME_SUITES_USE_CBC
#endif

/* This macro determines whether the CBC construct used in TLS 1.0-1.2 (as
 * opposed to the very different CBC construct used in SSLv3) is supported. */
#if defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC) && \
    ( defined(MBEDTLS_SSL_PROTO_TLS1) ||        \
      defined(MBEDTLS_SSL_PROTO_TLS1_1) ||      \
      defined(MBEDTLS_SSL_PROTO_TLS1_2) )
#define MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC
#endif

#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER) ||   \
    defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC)
#define MBEDTLS_SSL_SOME_MODES_USE_MAC
#endif

#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
/* Ciphersuites using HMAC */
#if defined(MBEDTLS_SHA512_C)
#define MBEDTLS_SSL_MAC_ADD                 48  /* SHA-384 used for HMAC */
#elif defined(MBEDTLS_SHA256_C)
#define MBEDTLS_SSL_MAC_ADD                 32  /* SHA-256 used for HMAC */
#else
#define MBEDTLS_SSL_MAC_ADD                 20  /* SHA-1   used for HMAC */
#endif
#else /* MBEDTLS_SSL_SOME_MODES_USE_MAC */
/* AEAD ciphersuites: GCM and CCM use a 128 bits tag */
#define MBEDTLS_SSL_MAC_ADD                 16
#endif

#if defined(MBEDTLS_CIPHER_MODE_CBC)
#define MBEDTLS_SSL_PADDING_ADD            256
#else
#define MBEDTLS_SSL_PADDING_ADD              0
#endif

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
#define MBEDTLS_SSL_MAX_CID_EXPANSION      MBEDTLS_SSL_CID_PADDING_GRANULARITY
#else
#define MBEDTLS_SSL_MAX_CID_EXPANSION        0
#endif

#define MBEDTLS_SSL_PAYLOAD_OVERHEAD ( MBEDTLS_SSL_COMPRESSION_ADD +    \
                                       MBEDTLS_MAX_IV_LENGTH +          \
                                       MBEDTLS_SSL_MAC_ADD +            \
                                       MBEDTLS_SSL_PADDING_ADD +        \
                                       MBEDTLS_SSL_MAX_CID_EXPANSION    \
                                       )

#define MBEDTLS_SSL_IN_PAYLOAD_LEN ( MBEDTLS_SSL_PAYLOAD_OVERHEAD + \
                                     ( MBEDTLS_SSL_IN_CONTENT_LEN ) )

#define MBEDTLS_SSL_OUT_PAYLOAD_LEN ( MBEDTLS_SSL_PAYLOAD_OVERHEAD + \
                                      ( MBEDTLS_SSL_OUT_CONTENT_LEN ) )

/* The maximum number of buffered handshake messages. */
#define MBEDTLS_SSL_MAX_BUFFERED_HS 4

/* Maximum length we can advertise as our max content length for
   RFC 6066 max_fragment_length extension negotiation purposes
   (the lesser of both sizes, if they are unequal.)
 */
#define MBEDTLS_TLS_EXT_ADV_CONTENT_LEN (                            \
        (MBEDTLS_SSL_IN_CONTENT_LEN > MBEDTLS_SSL_OUT_CONTENT_LEN)   \
        ? ( MBEDTLS_SSL_OUT_CONTENT_LEN )                            \
        : ( MBEDTLS_SSL_IN_CONTENT_LEN )                             \
        )

/* Maximum size in bytes of list in sig-hash algorithm ext., RFC 5246 */
#define MBEDTLS_SSL_MAX_SIG_HASH_ALG_LIST_LEN  65534

/* Maximum size in bytes of list in supported elliptic curve ext., RFC 4492 */
#define MBEDTLS_SSL_MAX_CURVE_LIST_LEN         65535

/*
 * Check that we obey the standard's message size bounds
 */

#if MBEDTLS_SSL_MAX_CONTENT_LEN > 16384
#error "Bad configuration - record content too large."
#endif

#if MBEDTLS_SSL_IN_CONTENT_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN
#error "Bad configuration - incoming record content should not be larger than MBEDTLS_SSL_MAX_CONTENT_LEN."
#endif

#if MBEDTLS_SSL_OUT_CONTENT_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN
#error "Bad configuration - outgoing record content should not be larger than MBEDTLS_SSL_MAX_CONTENT_LEN."
#endif

#if MBEDTLS_SSL_IN_PAYLOAD_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN + 2048
#error "Bad configuration - incoming protected record payload too large."
#endif

#if MBEDTLS_SSL_OUT_PAYLOAD_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN + 2048
#error "Bad configuration - outgoing protected record payload too large."
#endif

/* Calculate buffer sizes */

/* Note: Even though the TLS record header is only 5 bytes
   long, we're internally using 8 bytes to store the
   implicit sequence number. */
#define MBEDTLS_SSL_HEADER_LEN 13

#if !defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
#define MBEDTLS_SSL_IN_BUFFER_LEN  \
    ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_IN_PAYLOAD_LEN ) )
#else
#define MBEDTLS_SSL_IN_BUFFER_LEN  \
    ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_IN_PAYLOAD_LEN ) \
      + ( MBEDTLS_SSL_CID_IN_LEN_MAX ) )
#endif

#if !defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
#define MBEDTLS_SSL_OUT_BUFFER_LEN  \
    ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_OUT_PAYLOAD_LEN ) )
#else
#define MBEDTLS_SSL_OUT_BUFFER_LEN                               \
    ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_OUT_PAYLOAD_LEN )    \
      + ( MBEDTLS_SSL_CID_OUT_LEN_MAX ) )
#endif

#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
static inline size_t mbedtls_ssl_get_output_buflen( const mbedtls_ssl_context *ctx )
{
#if defined (MBEDTLS_SSL_DTLS_CONNECTION_ID)
    return mbedtls_ssl_get_output_max_frag_len( ctx )
               + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD
               + MBEDTLS_SSL_CID_OUT_LEN_MAX;
#else
    return mbedtls_ssl_get_output_max_frag_len( ctx )
               + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD;
#endif
}

static inline size_t mbedtls_ssl_get_input_buflen( const mbedtls_ssl_context *ctx )
{
#if defined (MBEDTLS_SSL_DTLS_CONNECTION_ID)
    return mbedtls_ssl_get_input_max_frag_len( ctx )
               + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD
               + MBEDTLS_SSL_CID_IN_LEN_MAX;
#else
    return mbedtls_ssl_get_input_max_frag_len( ctx )
               + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD;
#endif
}
#endif

#ifdef MBEDTLS_ZLIB_SUPPORT
/* Compression buffer holds both IN and OUT buffers, so should be size of the larger */
#define MBEDTLS_SSL_COMPRESS_BUFFER_LEN (                               \
        ( MBEDTLS_SSL_IN_BUFFER_LEN > MBEDTLS_SSL_OUT_BUFFER_LEN )      \
        ? MBEDTLS_SSL_IN_BUFFER_LEN                                     \
        : MBEDTLS_SSL_OUT_BUFFER_LEN                                    \
        )
#endif

/*
 * TLS extension flags (for extensions with outgoing ServerHello content
 * that need it (e.g. for RENEGOTIATION_INFO the server already knows because
 * of state of the renegotiation flag, so no indicator is required)
 */
#define MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS_PRESENT (1 << 0)
#define MBEDTLS_TLS_EXT_ECJPAKE_KKPP_OK                 (1 << 1)

/**
 * \brief        This function checks if the remaining size in a buffer is
 *               greater or equal than a needed space.
 *
 * \param cur    Pointer to the current position in the buffer.
 * \param end    Pointer to one past the end of the buffer.
 * \param need   Needed space in bytes.
 *
 * \return       Zero if the needed space is available in the buffer, non-zero
 *               otherwise.
 */
static inline int mbedtls_ssl_chk_buf_ptr( const uint8_t *cur,
                                           const uint8_t *end, size_t need )
{
    return( ( cur > end ) || ( need > (size_t)( end - cur ) ) );
}

/**
 * \brief        This macro checks if the remaining size in a buffer is
 *               greater or equal than a needed space. If it is not the case,
 *               it returns an SSL_BUFFER_TOO_SMALL error.
 *
 * \param cur    Pointer to the current position in the buffer.
 * \param end    Pointer to one past the end of the buffer.
 * \param need   Needed space in bytes.
 *
 */
#define MBEDTLS_SSL_CHK_BUF_PTR( cur, end, need )                        \
    do {                                                                 \
        if( mbedtls_ssl_chk_buf_ptr( ( cur ), ( end ), ( need ) ) != 0 ) \
        {                                                                \
            return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );                  \
        }                                                                \
    } while( 0 )

#ifdef __cplusplus
extern "C" {
#endif

#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
    defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
/*
 * Abstraction for a grid of allowed signature-hash-algorithm pairs.
 */
struct mbedtls_ssl_sig_hash_set_t
{
    /* At the moment, we only need to remember a single suitable
     * hash algorithm per signature algorithm. As long as that's
     * the case - and we don't need a general lookup function -
     * we can implement the sig-hash-set as a map from signatures
     * to hash algorithms. */
    mbedtls_md_type_t rsa;
    mbedtls_md_type_t ecdsa;
};
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
          MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */

typedef int  mbedtls_ssl_tls_prf_cb( const unsigned char *secret, size_t slen,
                                     const char *label,
                                     const unsigned char *random, size_t rlen,
                                     unsigned char *dstbuf, size_t dlen );

/* cipher.h exports the maximum IV, key and block length from
 * all ciphers enabled in the config, regardless of whether those
 * ciphers are actually usable in SSL/TLS. Notably, XTS is enabled
 * in the default configuration and uses 64 Byte keys, but it is
 * not used for record protection in SSL/TLS.
 *
 * In order to prevent unnecessary inflation of key structures,
 * we introduce SSL-specific variants of the max-{key,block,IV}
 * macros here which are meant to only take those ciphers into
 * account which can be negotiated in SSL/TLS.
 *
 * Since the current definitions of MBEDTLS_MAX_{KEY|BLOCK|IV}_LENGTH
 * in cipher.h are rough overapproximations of the real maxima, here
 * we content ourselves with replicating those overapproximations
 * for the maximum block and IV length, and excluding XTS from the
 * computation of the maximum key length. */
#define MBEDTLS_SSL_MAX_BLOCK_LENGTH 16
#define MBEDTLS_SSL_MAX_IV_LENGTH    16
#define MBEDTLS_SSL_MAX_KEY_LENGTH   32

/**
 * \brief   The data structure holding the cryptographic material (key and IV)
 *          used for record protection in TLS 1.3.
 */
struct mbedtls_ssl_key_set
{
    /*! The key for client->server records. */
    unsigned char client_write_key[ MBEDTLS_SSL_MAX_KEY_LENGTH ];
    /*! The key for server->client records. */
    unsigned char server_write_key[ MBEDTLS_SSL_MAX_KEY_LENGTH ];
    /*! The IV  for client->server records. */
    unsigned char client_write_iv[ MBEDTLS_SSL_MAX_IV_LENGTH ];
    /*! The IV  for server->client records. */
    unsigned char server_write_iv[ MBEDTLS_SSL_MAX_IV_LENGTH ];

    size_t key_len; /*!< The length of client_write_key and
                     *   server_write_key, in Bytes. */
    size_t iv_len;  /*!< The length of client_write_iv and
                     *   server_write_iv, in Bytes. */
};
typedef struct mbedtls_ssl_key_set mbedtls_ssl_key_set;

/*
 * This structure contains the parameters only needed during handshake.
 */
struct mbedtls_ssl_handshake_params
{
    /*
     * Handshake specific crypto variables
     */

    uint8_t max_major_ver;              /*!< max. major version client*/
    uint8_t max_minor_ver;              /*!< max. minor version client*/
    uint8_t resume;                     /*!<  session resume indicator*/
    uint8_t cli_exts;                   /*!< client extension presence*/

#if defined(MBEDTLS_X509_CRT_PARSE_C) &&        \
    defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
    uint8_t sni_authmode;               /*!< authmode from SNI callback     */
#endif

#if defined(MBEDTLS_SSL_SESSION_TICKETS)
    uint8_t new_session_ticket;         /*!< use NewSessionTicket?    */
#endif /* MBEDTLS_SSL_SESSION_TICKETS */

#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
    uint8_t extended_ms;                /*!< use Extended Master Secret? */
#endif

#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
    uint8_t async_in_progress;          /*!< an asynchronous operation is in progress */
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */

#if defined(MBEDTLS_SSL_PROTO_DTLS)
    unsigned char retransmit_state;     /*!<  Retransmission state           */
#endif

#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED)
    uint8_t ecrs_enabled;               /*!< Handshake supports EC restart? */
    enum { /* this complements ssl->state with info on intra-state operations */
        ssl_ecrs_none = 0,              /*!< nothing going on (yet)         */
        ssl_ecrs_crt_verify,            /*!< Certificate: crt_verify()      */
        ssl_ecrs_ske_start_processing,  /*!< ServerKeyExchange: pk_verify() */
        ssl_ecrs_cke_ecdh_calc_secret,  /*!< ClientKeyExchange: ECDH step 2 */
        ssl_ecrs_crt_vrfy_sign,         /*!< CertificateVerify: pk_sign()   */
    } ecrs_state;                       /*!< current (or last) operation    */
    mbedtls_x509_crt *ecrs_peer_cert;   /*!< The peer's CRT chain.          */
    size_t ecrs_n;                      /*!< place for saving a length      */
#endif

#if defined(MBEDTLS_SSL_PROTO_TLS1_2) &&                \
    defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
    mbedtls_ssl_sig_hash_set_t hash_algs;             /*!<  Set of suitable sig-hash pairs */
#endif

    size_t pmslen;                      /*!<  premaster length        */

    mbedtls_ssl_ciphersuite_t const *ciphersuite_info;

    void (*update_checksum)(mbedtls_ssl_context *, const unsigned char *, size_t);
    void (*calc_verify)(const mbedtls_ssl_context *, unsigned char *, size_t *);
    void (*calc_finished)(mbedtls_ssl_context *, unsigned char *, int);
    mbedtls_ssl_tls_prf_cb *tls_prf;

#if defined(MBEDTLS_DHM_C)
    mbedtls_dhm_context dhm_ctx;                /*!<  DHM key exchange        */
#endif

/* Adding guard for MBEDTLS_ECDSA_C to ensure no compile errors due
 * to guards also being in ssl_srv.c and ssl_cli.c. There is a gap
 * in functionality that access to ecdh_ctx structure is needed for
 * MBEDTLS_ECDSA_C which does not seem correct.
 */
#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
    mbedtls_ecdh_context ecdh_ctx;              /*!<  ECDH key exchange       */

#if defined(MBEDTLS_USE_PSA_CRYPTO)
    psa_key_type_t ecdh_psa_type;
    uint16_t ecdh_bits;
    psa_key_id_t ecdh_psa_privkey;
    unsigned char ecdh_psa_peerkey[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH];
    size_t ecdh_psa_peerkey_len;
#endif /* MBEDTLS_USE_PSA_CRYPTO */
#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C */

#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
    mbedtls_ecjpake_context ecjpake_ctx;        /*!< EC J-PAKE key exchange */
#if defined(MBEDTLS_SSL_CLI_C)
    unsigned char *ecjpake_cache;               /*!< Cache for ClientHello ext */
    size_t ecjpake_cache_len;                   /*!< Length of cached data */
#endif
#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */

#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) ||      \
    defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
    const mbedtls_ecp_curve_info **curves;      /*!<  Supported elliptic curves */
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
    psa_key_id_t psk_opaque;            /*!< Opaque PSK from the callback   */
#endif /* MBEDTLS_USE_PSA_CRYPTO */
    unsigned char *psk;                 /*!<  PSK from the callback         */
    size_t psk_len;                     /*!<  Length of PSK from callback   */
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */

#if defined(MBEDTLS_X509_CRT_PARSE_C)
    mbedtls_ssl_key_cert *key_cert;     /*!< chosen key/cert pair (server)  */
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
    mbedtls_ssl_key_cert *sni_key_cert; /*!< key/cert list from SNI         */
    mbedtls_x509_crt *sni_ca_chain;     /*!< trusted CAs from SNI callback  */
    mbedtls_x509_crl *sni_ca_crl;       /*!< trusted CAs CRLs from SNI      */
#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
#endif /* MBEDTLS_X509_CRT_PARSE_C */

#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED)
    mbedtls_x509_crt_restart_ctx ecrs_ctx;  /*!< restart context            */
#endif

#if defined(MBEDTLS_X509_CRT_PARSE_C) &&        \
    !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
    mbedtls_pk_context peer_pubkey;     /*!< The public key from the peer.  */
#endif /* MBEDTLS_X509_CRT_PARSE_C && !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */

#if defined(MBEDTLS_SSL_PROTO_DTLS)
    struct
    {
        size_t total_bytes_buffered; /*!< Cumulative size of heap allocated
                                      *   buffers used for message buffering. */

        uint8_t seen_ccs;               /*!< Indicates if a CCS message has
                                         *   been seen in the current flight. */

        struct mbedtls_ssl_hs_buffer
        {
            unsigned is_valid      : 1;
            unsigned is_fragmented : 1;
            unsigned is_complete   : 1;
            unsigned char *data;
            size_t data_len;
        } hs[MBEDTLS_SSL_MAX_BUFFERED_HS];

        struct
        {
            unsigned char *data;
            size_t len;
            unsigned epoch;
        } future_record;

    } buffering;

    unsigned int out_msg_seq;           /*!<  Outgoing handshake sequence number */
    unsigned int in_msg_seq;            /*!<  Incoming handshake sequence number */

    unsigned char *verify_cookie;       /*!<  Cli: HelloVerifyRequest cookie
                                              Srv: unused                    */
    unsigned char verify_cookie_len;    /*!<  Cli: cookie length
                                              Srv: flag for sending a cookie */

    uint32_t retransmit_timeout;        /*!<  Current value of timeout       */
    mbedtls_ssl_flight_item *flight;    /*!<  Current outgoing flight        */
    mbedtls_ssl_flight_item *cur_msg;   /*!<  Current message in flight      */
    unsigned char *cur_msg_p;           /*!<  Position in current message    */
    unsigned int in_flight_start_seq;   /*!<  Minimum message sequence in the
                                              flight being received          */
    mbedtls_ssl_transform *alt_transform_out;   /*!<  Alternative transform for
                                              resending messages             */
    unsigned char alt_out_ctr[8];       /*!<  Alternative record epoch/counter
                                              for resending messages         */

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
    /* The state of CID configuration in this handshake. */

    uint8_t cid_in_use; /*!< This indicates whether the use of the CID extension
                         *   has been negotiated. Possible values are
                         *   #MBEDTLS_SSL_CID_ENABLED and
                         *   #MBEDTLS_SSL_CID_DISABLED. */
    unsigned char peer_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ]; /*! The peer's CID */
    uint8_t peer_cid_len;                                  /*!< The length of
                                                            *   \c peer_cid.  */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */

    uint16_t mtu;                       /*!<  Handshake mtu, used to fragment outgoing messages */
#endif /* MBEDTLS_SSL_PROTO_DTLS */

    /*
     * Checksum contexts
     */
#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
    defined(MBEDTLS_SSL_PROTO_TLS1_1)
    mbedtls_md5_context fin_md5;
    mbedtls_sha1_context fin_sha1;
#endif
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#if defined(MBEDTLS_SHA256_C)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
    psa_hash_operation_t fin_sha256_psa;
#else
    mbedtls_sha256_context fin_sha256;
#endif
#endif
#if defined(MBEDTLS_SHA512_C)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
    psa_hash_operation_t fin_sha384_psa;
#else
    mbedtls_sha512_context fin_sha512;
#endif
#endif
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */

    unsigned char randbytes[64];        /*!<  random bytes            */
    unsigned char premaster[MBEDTLS_PREMASTER_SIZE];
                                        /*!<  premaster secret        */

#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
    /** Asynchronous operation context. This field is meant for use by the
     * asynchronous operation callbacks (mbedtls_ssl_config::f_async_sign_start,
     * mbedtls_ssl_config::f_async_decrypt_start,
     * mbedtls_ssl_config::f_async_resume, mbedtls_ssl_config::f_async_cancel).
     * The library does not use it internally. */
    void *user_async_ctx;
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
};

typedef struct mbedtls_ssl_hs_buffer mbedtls_ssl_hs_buffer;

/*
 * Representation of decryption/encryption transformations on records
 *
 * There are the following general types of record transformations:
 * - Stream transformations (TLS versions <= 1.2 only)
 *   Transformation adding a MAC and applying a stream-cipher
 *   to the authenticated message.
 * - CBC block cipher transformations ([D]TLS versions <= 1.2 only)
 *   In addition to the distinction of the order of encryption and
 *   authentication, there's a fundamental difference between the
 *   handling in SSL3 & TLS 1.0 and TLS 1.1 and TLS 1.2: For SSL3
 *   and TLS 1.0, the final IV after processing a record is used
 *   as the IV for the next record. No explicit IV is contained
 *   in an encrypted record. The IV for the first record is extracted
 *   at key extraction time. In contrast, for TLS 1.1 and 1.2, no
 *   IV is generated at key extraction time, but every encrypted
 *   record is explicitly prefixed by the IV with which it was encrypted.
 * - AEAD transformations ([D]TLS versions >= 1.2 only)
 *   These come in two fundamentally different versions, the first one
 *   used in TLS 1.2, excluding ChaChaPoly ciphersuites, and the second
 *   one used for ChaChaPoly ciphersuites in TLS 1.2 as well as for TLS 1.3.
 *   In the first transformation, the IV to be used for a record is obtained
 *   as the concatenation of an explicit, static 4-byte IV and the 8-byte
 *   record sequence number, and explicitly prepending this sequence number
 *   to the encrypted record. In contrast, in the second transformation
 *   the IV is obtained by XOR'ing a static IV obtained at key extraction
 *   time with the 8-byte record sequence number, without prepending the
 *   latter to the encrypted record.
 *
 * Additionally, DTLS 1.2 + CID as well as TLS 1.3 use an inner plaintext
 * which allows to add flexible length padding and to hide a record's true
 * content type.
 *
 * In addition to type and version, the following parameters are relevant:
 * - The symmetric cipher algorithm to be used.
 * - The (static) encryption/decryption keys for the cipher.
 * - For stream/CBC, the type of message digest to be used.
 * - For stream/CBC, (static) encryption/decryption keys for the digest.
 * - For AEAD transformations, the size (potentially 0) of an explicit,
 *   random initialization vector placed in encrypted records.
 * - For some transformations (currently AEAD and CBC in SSL3 and TLS 1.0)
 *   an implicit IV. It may be static (e.g. AEAD) or dynamic (e.g. CBC)
 *   and (if present) is combined with the explicit IV in a transformation-
 *   dependent way (e.g. appending in TLS 1.2 and XOR'ing in TLS 1.3).
 * - For stream/CBC, a flag determining the order of encryption and MAC.
 * - The details of the transformation depend on the SSL/TLS version.
 * - The length of the authentication tag.
 *
 * Note: Except for CBC in SSL3 and TLS 1.0, these parameters are
 *       constant across multiple encryption/decryption operations.
 *       For CBC, the implicit IV needs to be updated after each
 *       operation.
 *
 * The struct below refines this abstract view as follows:
 * - The cipher underlying the transformation is managed in
 *   cipher contexts cipher_ctx_{enc/dec}, which must have the
 *   same cipher type. The mode of these cipher contexts determines
 *   the type of the transformation in the sense above: e.g., if
 *   the type is MBEDTLS_CIPHER_AES_256_CBC resp. MBEDTLS_CIPHER_AES_192_GCM
 *   then the transformation has type CBC resp. AEAD.
 * - The cipher keys are never stored explicitly but
 *   are maintained within cipher_ctx_{enc/dec}.
 * - For stream/CBC transformations, the message digest contexts
 *   used for the MAC's are stored in md_ctx_{enc/dec}. These contexts
 *   are unused for AEAD transformations.
 * - For stream/CBC transformations and versions > SSL3, the
 *   MAC keys are not stored explicitly but maintained within
 *   md_ctx_{enc/dec}.
 * - For stream/CBC transformations and version SSL3, the MAC
 *   keys are stored explicitly in mac_enc, mac_dec and have
 *   a fixed size of 20 bytes. These fields are unused for
 *   AEAD transformations or transformations >= TLS 1.0.
 * - For transformations using an implicit IV maintained within
 *   the transformation context, its contents are stored within
 *   iv_{enc/dec}.
 * - The value of ivlen indicates the length of the IV.
 *   This is redundant in case of stream/CBC transformations
 *   which always use 0 resp. the cipher's block length as the
 *   IV length, but is needed for AEAD ciphers and may be
 *   different from the underlying cipher's block length
 *   in this case.
 * - The field fixed_ivlen is nonzero for AEAD transformations only
 *   and indicates the length of the static part of the IV which is
 *   constant throughout the communication, and which is stored in
 *   the first fixed_ivlen bytes of the iv_{enc/dec} arrays.
 *   Note: For CBC in SSL3 and TLS 1.0, the fields iv_{enc/dec}
 *   still store IV's for continued use across multiple transformations,
 *   so it is not true that fixed_ivlen == 0 means that iv_{enc/dec} are
 *   not being used!
 * - minor_ver denotes the SSL/TLS version
 * - For stream/CBC transformations, maclen denotes the length of the
 *   authentication tag, while taglen is unused and 0.
 * - For AEAD transformations, taglen denotes the length of the
 *   authentication tag, while maclen is unused and 0.
 * - For CBC transformations, encrypt_then_mac determines the
 *   order of encryption and authentication. This field is unused
 *   in other transformations.
 *
 */
struct mbedtls_ssl_transform
{
    /*
     * Session specific crypto layer
     */
    size_t minlen;                      /*!<  min. ciphertext length  */
    size_t ivlen;                       /*!<  IV length               */
    size_t fixed_ivlen;                 /*!<  Fixed part of IV (AEAD) */
    size_t maclen;                      /*!<  MAC(CBC) len            */
    size_t taglen;                      /*!<  TAG(AEAD) len           */

    unsigned char iv_enc[16];           /*!<  IV (encryption)         */
    unsigned char iv_dec[16];           /*!<  IV (decryption)         */

#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)

#if defined(MBEDTLS_SSL_PROTO_SSL3)
    /* Needed only for SSL v3.0 secret */
    unsigned char mac_enc[20];          /*!<  SSL v3.0 secret (enc)   */
    unsigned char mac_dec[20];          /*!<  SSL v3.0 secret (dec)   */
#endif /* MBEDTLS_SSL_PROTO_SSL3 */

    mbedtls_md_context_t md_ctx_enc;            /*!<  MAC (encryption)        */
    mbedtls_md_context_t md_ctx_dec;            /*!<  MAC (decryption)        */

#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
    int encrypt_then_mac;       /*!< flag for EtM activation                */
#endif

#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */

    mbedtls_cipher_context_t cipher_ctx_enc;    /*!<  encryption context      */
    mbedtls_cipher_context_t cipher_ctx_dec;    /*!<  decryption context      */
    int minor_ver;

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
    uint8_t in_cid_len;
    uint8_t out_cid_len;
    unsigned char in_cid [ MBEDTLS_SSL_CID_OUT_LEN_MAX ];
    unsigned char out_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ];
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */

    /*
     * Session specific compression layer
     */
#if defined(MBEDTLS_ZLIB_SUPPORT)
    z_stream ctx_deflate;               /*!<  compression context     */
    z_stream ctx_inflate;               /*!<  decompression context   */
#endif

#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
    /* We need the Hello random bytes in order to re-derive keys from the
     * Master Secret and other session info, see ssl_populate_transform() */
    unsigned char randbytes[64]; /*!< ServerHello.random+ClientHello.random */
#endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */
};

/*
 * Return 1 if the transform uses an AEAD cipher, 0 otherwise.
 * Equivalently, return 0 if a separate MAC is used, 1 otherwise.
 */
static inline int mbedtls_ssl_transform_uses_aead(
        const mbedtls_ssl_transform *transform )
{
#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
    return( transform->maclen == 0 && transform->taglen != 0 );
#else
    (void) transform;
    return( 1 );
#endif
}

/*
 * Internal representation of record frames
 *
 * Instances come in two flavors:
 * (1) Encrypted
 *     These always have data_offset = 0
 * (2) Unencrypted
 *     These have data_offset set to the amount of
 *     pre-expansion during record protection. Concretely,
 *     this is the length of the fixed part of the explicit IV
 *     used for encryption, or 0 if no explicit IV is used
 *     (e.g. for CBC in TLS 1.0, or stream ciphers).
 *
 * The reason for the data_offset in the unencrypted case
 * is to allow for in-place conversion of an unencrypted to
 * an encrypted record. If the offset wasn't included, the
 * encrypted content would need to be shifted afterwards to
 * make space for the fixed IV.
 *
 */
#if MBEDTLS_SSL_CID_OUT_LEN_MAX > MBEDTLS_SSL_CID_IN_LEN_MAX
#define MBEDTLS_SSL_CID_LEN_MAX MBEDTLS_SSL_CID_OUT_LEN_MAX
#else
#define MBEDTLS_SSL_CID_LEN_MAX MBEDTLS_SSL_CID_IN_LEN_MAX
#endif

typedef struct
{
    uint8_t ctr[8];         /* In TLS:  The implicit record sequence number.
                             * In DTLS: The 2-byte epoch followed by
                             *          the 6-byte sequence number.
                             * This is stored as a raw big endian byte array
                             * as opposed to a uint64_t because we rarely
                             * need to perform arithmetic on this, but do
                             * need it as a Byte array for the purpose of
                             * MAC computations.                             */
    uint8_t type;           /* The record content type.                      */
    uint8_t ver[2];         /* SSL/TLS version as present on the wire.
                             * Convert to internal presentation of versions
                             * using mbedtls_ssl_read_version() and
                             * mbedtls_ssl_write_version().
                             * Keep wire-format for MAC computations.        */

    unsigned char *buf;     /* Memory buffer enclosing the record content    */
    size_t buf_len;         /* Buffer length                                 */
    size_t data_offset;     /* Offset of record content                      */
    size_t data_len;        /* Length of record content                      */

#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
    uint8_t cid_len;        /* Length of the CID (0 if not present)          */
    unsigned char cid[ MBEDTLS_SSL_CID_LEN_MAX ]; /* The CID                 */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
} mbedtls_record;

#if defined(MBEDTLS_X509_CRT_PARSE_C)
/*
 * List of certificate + private key pairs
 */
struct mbedtls_ssl_key_cert
{
    mbedtls_x509_crt *cert;                 /*!< cert                       */
    mbedtls_pk_context *key;                /*!< private key                */
    mbedtls_ssl_key_cert *next;             /*!< next key/cert pair         */
};
#endif /* MBEDTLS_X509_CRT_PARSE_C */

#if defined(MBEDTLS_SSL_PROTO_DTLS)
/*
 * List of handshake messages kept around for resending
 */
struct mbedtls_ssl_flight_item
{
    unsigned char *p;       /*!< message, including handshake headers   */
    size_t len;             /*!< length of p                            */
    unsigned char type;     /*!< type of the message: handshake or CCS  */
    mbedtls_ssl_flight_item *next;  /*!< next handshake message(s)              */
};
#endif /* MBEDTLS_SSL_PROTO_DTLS */

#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
    defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)

/* Find an entry in a signature-hash set matching a given hash algorithm. */
mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set,
                                                 mbedtls_pk_type_t sig_alg );
/* Add a signature-hash-pair to a signature-hash set */
void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set,
                                   mbedtls_pk_type_t sig_alg,
                                   mbedtls_md_type_t md_alg );
/* Allow exactly one hash algorithm for each signature. */
void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set,
                                          mbedtls_md_type_t md_alg );

/* Setup an empty signature-hash set */
static inline void mbedtls_ssl_sig_hash_set_init( mbedtls_ssl_sig_hash_set_t *set )
{
    mbedtls_ssl_sig_hash_set_const_hash( set, MBEDTLS_MD_NONE );
}

#endif /* MBEDTLS_SSL_PROTO_TLS1_2) &&
          MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */

/**
 * \brief           Free referenced items in an SSL transform context and clear
 *                  memory
 *
 * \param transform SSL transform context
 */
void mbedtls_ssl_transform_free( mbedtls_ssl_transform *transform );

/**
 * \brief           Free referenced items in an SSL handshake context and clear
 *                  memory
 *
 * \param ssl       SSL context
 */
void mbedtls_ssl_handshake_free( mbedtls_ssl_context *ssl );

int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl );
int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl );
void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl );

int mbedtls_ssl_send_fatal_handshake_failure( mbedtls_ssl_context *ssl );

void mbedtls_ssl_reset_checksum( mbedtls_ssl_context *ssl );
int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl );

int mbedtls_ssl_handle_message_type( mbedtls_ssl_context *ssl );
int mbedtls_ssl_prepare_handshake_record( mbedtls_ssl_context *ssl );
void mbedtls_ssl_update_handshake_status( mbedtls_ssl_context *ssl );

/**
 * \brief       Update record layer
 *
 *              This function roughly separates the implementation
 *              of the logic of (D)TLS from the implementation
 *              of the secure transport.
 *
 * \param  ssl              The SSL context to use.
 * \param  update_hs_digest This indicates if the handshake digest
 *                          should be automatically updated in case
 *                          a handshake message is found.
 *
 * \return      0 or non-zero error code.
 *
 * \note        A clarification on what is called 'record layer' here
 *              is in order, as many sensible definitions are possible:
 *
 *              The record layer takes as input an untrusted underlying
 *              transport (stream or datagram) and transforms it into
 *              a serially multiplexed, secure transport, which
 *              conceptually provides the following:
 *
 *              (1) Three datagram based, content-agnostic transports
 *                  for handshake, alert and CCS messages.
 *              (2) One stream- or datagram-based transport
 *                  for application data.
 *              (3) Functionality for changing the underlying transform
 *                  securing the contents.
 *
 *              The interface to this functionality is given as follows:
 *
 *              a Updating
 *                [Currently implemented by mbedtls_ssl_read_record]
 *
 *                Check if and on which of the four 'ports' data is pending:
 *                Nothing, a controlling datagram of type (1), or application
 *                data (2). In any case data is present, internal buffers
 *                provide access to the data for the user to process it.
 *                Consumption of type (1) datagrams is done automatically
 *                on the next update, invalidating that the internal buffers
 *                for previous datagrams, while consumption of application
 *                data (2) is user-controlled.
 *
 *              b Reading of application data
 *                [Currently manual adaption of ssl->in_offt pointer]
 *
 *                As mentioned in the last paragraph, consumption of data
 *                is different from the automatic consumption of control
 *                datagrams (1) because application data is treated as a stream.
 *
 *              c Tracking availability of application data
 *                [Currently manually through decreasing ssl->in_msglen]
 *
 *                For efficiency and to retain datagram semantics for
 *                application data in case of DTLS, the record layer
 *                provides functionality for checking how much application
 *                data is still available in the internal buffer.
 *
 *              d Changing the transformation securing the communication.
 *
 *              Given an opaque implementation of the record layer in the
 *              above sense, it should be possible to implement the logic
 *              of (D)TLS on top of it without the need to know anything
 *              about the record layer's internals. This is done e.g.
 *              in all the handshake handling functions, and in the
 *              application data reading function mbedtls_ssl_read.
 *
 * \note        The above tries to give a conceptual picture of the
 *              record layer, but the current implementation deviates
 *              from it in some places. For example, our implementation of
 *              the update functionality through mbedtls_ssl_read_record
 *              discards datagrams depending on the current state, which
 *              wouldn't fall under the record layer's responsibility
 *              following the above definition.
 *
 */
int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl,
                             unsigned update_hs_digest );
int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want );

int mbedtls_ssl_write_handshake_msg( mbedtls_ssl_context *ssl );
int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl, uint8_t force_flush );
int mbedtls_ssl_flush_output( mbedtls_ssl_context *ssl );

int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl );
int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl );

int mbedtls_ssl_parse_change_cipher_spec( mbedtls_ssl_context *ssl );
int mbedtls_ssl_write_change_cipher_spec( mbedtls_ssl_context *ssl );

int mbedtls_ssl_parse_finished( mbedtls_ssl_context *ssl );
int mbedtls_ssl_write_finished( mbedtls_ssl_context *ssl );

void mbedtls_ssl_optimize_checksum( mbedtls_ssl_context *ssl,
                            const mbedtls_ssl_ciphersuite_t *ciphersuite_info );

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
int mbedtls_ssl_psk_derive_premaster( mbedtls_ssl_context *ssl, mbedtls_key_exchange_type_t key_ex );

/**
 * Get the first defined PSK by order of precedence:
 * 1. handshake PSK set by \c mbedtls_ssl_set_hs_psk() in the PSK callback
 * 2. static PSK configured by \c mbedtls_ssl_conf_psk()
 * Return a code and update the pair (PSK, PSK length) passed to this function
 */
static inline int mbedtls_ssl_get_psk( const mbedtls_ssl_context *ssl,
    const unsigned char **psk, size_t *psk_len )
{
    if( ssl->handshake->psk != NULL && ssl->handshake->psk_len > 0 )
    {
        *psk = ssl->handshake->psk;
        *psk_len = ssl->handshake->psk_len;
    }

    else if( ssl->conf->psk != NULL && ssl->conf->psk_len > 0 )
    {
        *psk = ssl->conf->psk;
        *psk_len = ssl->conf->psk_len;
    }

    else
    {
        *psk = NULL;
        *psk_len = 0;
        return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED );
    }

    return( 0 );
}

#if defined(MBEDTLS_USE_PSA_CRYPTO)
/**
 * Get the first defined opaque PSK by order of precedence:
 * 1. handshake PSK set by \c mbedtls_ssl_set_hs_psk_opaque() in the PSK
 *    callback
 * 2. static PSK configured by \c mbedtls_ssl_conf_psk_opaque()
 * Return an opaque PSK
 */
static inline psa_key_id_t mbedtls_ssl_get_opaque_psk(
    const mbedtls_ssl_context *ssl )
{
    if( ! mbedtls_svc_key_id_is_null( ssl->handshake->psk_opaque ) )
        return( ssl->handshake->psk_opaque );

    if( ! mbedtls_svc_key_id_is_null( ssl->conf->psk_opaque ) )
        return( ssl->conf->psk_opaque );

    return( MBEDTLS_SVC_KEY_ID_INIT );
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */

#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */

#if defined(MBEDTLS_PK_C)
unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context *pk );
unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t type );
mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig );
#endif

mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash );
unsigned char mbedtls_ssl_hash_from_md_alg( int md );
int mbedtls_ssl_set_calc_verify_md( mbedtls_ssl_context *ssl, int md );

#if defined(MBEDTLS_ECP_C)
int mbedtls_ssl_check_curve( const mbedtls_ssl_context *ssl, mbedtls_ecp_group_id grp_id );
#endif

#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
int mbedtls_ssl_check_sig_hash( const mbedtls_ssl_context *ssl,
                                mbedtls_md_type_t md );
#endif

#if defined(MBEDTLS_SSL_DTLS_SRTP)
static inline mbedtls_ssl_srtp_profile mbedtls_ssl_check_srtp_profile_value
                                                    ( const uint16_t srtp_profile_value )
{
    switch( srtp_profile_value )
    {
        case MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_80:
        case MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_32:
        case MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_80:
        case MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_32:
            return srtp_profile_value;
        default: break;
    }
    return( MBEDTLS_TLS_SRTP_UNSET );
}
#endif

#if defined(MBEDTLS_X509_CRT_PARSE_C)
static inline mbedtls_pk_context *mbedtls_ssl_own_key( mbedtls_ssl_context *ssl )
{
    mbedtls_ssl_key_cert *key_cert;

    if( ssl->handshake != NULL && ssl->handshake->key_cert != NULL )
        key_cert = ssl->handshake->key_cert;
    else
        key_cert = ssl->conf->key_cert;

    return( key_cert == NULL ? NULL : key_cert->key );
}

static inline mbedtls_x509_crt *mbedtls_ssl_own_cert( mbedtls_ssl_context *ssl )
{
    mbedtls_ssl_key_cert *key_cert;

    if( ssl->handshake != NULL && ssl->handshake->key_cert != NULL )
        key_cert = ssl->handshake->key_cert;
    else
        key_cert = ssl->conf->key_cert;

    return( key_cert == NULL ? NULL : key_cert->cert );
}

/*
 * Check usage of a certificate wrt extensions:
 * keyUsage, extendedKeyUsage (later), and nSCertType (later).
 *
 * Warning: cert_endpoint is the endpoint of the cert (ie, of our peer when we
 * check a cert we received from them)!
 *
 * Return 0 if everything is OK, -1 if not.
 */
int mbedtls_ssl_check_cert_usage( const mbedtls_x509_crt *cert,
                          const mbedtls_ssl_ciphersuite_t *ciphersuite,
                          int cert_endpoint,
                          uint32_t *flags );
#endif /* MBEDTLS_X509_CRT_PARSE_C */

void mbedtls_ssl_write_version( int major, int minor, int transport,
                        unsigned char ver[2] );
void mbedtls_ssl_read_version( int *major, int *minor, int transport,
                       const unsigned char ver[2] );

static inline size_t mbedtls_ssl_in_hdr_len( const mbedtls_ssl_context *ssl )
{
#if !defined(MBEDTLS_SSL_PROTO_DTLS)
    ((void) ssl);
#endif

#if defined(MBEDTLS_SSL_PROTO_DTLS)
    if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
    {
        return( 13 );
    }
    else
#endif /* MBEDTLS_SSL_PROTO_DTLS */
    {
        return( 5 );
    }
}

static inline size_t mbedtls_ssl_out_hdr_len( const mbedtls_ssl_context *ssl )
{
    return( (size_t) ( ssl->out_iv - ssl->out_hdr ) );
}

static inline size_t mbedtls_ssl_hs_hdr_len( const mbedtls_ssl_context *ssl )
{
#if defined(MBEDTLS_SSL_PROTO_DTLS)
    if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
        return( 12 );
#else
    ((void) ssl);
#endif
    return( 4 );
}

#if defined(MBEDTLS_SSL_PROTO_DTLS)
void mbedtls_ssl_send_flight_completed( mbedtls_ssl_context *ssl );
void mbedtls_ssl_recv_flight_completed( mbedtls_ssl_context *ssl );
int mbedtls_ssl_resend( mbedtls_ssl_context *ssl );
int mbedtls_ssl_flight_transmit( mbedtls_ssl_context *ssl );
#endif

/* Visible for testing purposes only */
#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
int mbedtls_ssl_dtls_replay_check( mbedtls_ssl_context const *ssl );
void mbedtls_ssl_dtls_replay_update( mbedtls_ssl_context *ssl );
#endif

int mbedtls_ssl_session_copy( mbedtls_ssl_session *dst,
                              const mbedtls_ssl_session *src );

#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
    defined(MBEDTLS_SSL_PROTO_TLS1_1)
int mbedtls_ssl_get_key_exchange_md_ssl_tls( mbedtls_ssl_context *ssl,
                                        unsigned char *output,
                                        unsigned char *data, size_t data_len );
#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \
          MBEDTLS_SSL_PROTO_TLS1_1 */

#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
    defined(MBEDTLS_SSL_PROTO_TLS1_2)
/* The hash buffer must have at least MBEDTLS_MD_MAX_SIZE bytes of length. */
int mbedtls_ssl_get_key_exchange_md_tls1_2( mbedtls_ssl_context *ssl,
                                            unsigned char *hash, size_t *hashlen,
                                            unsigned char *data, size_t data_len,
                                            mbedtls_md_type_t md_alg );
#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \
          MBEDTLS_SSL_PROTO_TLS1_2 */

#ifdef __cplusplus
}
#endif

void mbedtls_ssl_transform_init( mbedtls_ssl_transform *transform );
int mbedtls_ssl_encrypt_buf( mbedtls_ssl_context *ssl,
                             mbedtls_ssl_transform *transform,
                             mbedtls_record *rec,
                             int (*f_rng)(void *, unsigned char *, size_t),
                             void *p_rng );
int mbedtls_ssl_decrypt_buf( mbedtls_ssl_context const *ssl,
                             mbedtls_ssl_transform *transform,
                             mbedtls_record *rec );

/* Length of the "epoch" field in the record header */
static inline size_t mbedtls_ssl_ep_len( const mbedtls_ssl_context *ssl )
{
#if defined(MBEDTLS_SSL_PROTO_DTLS)
    if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
        return( 2 );
#else
    ((void) ssl);
#endif
    return( 0 );
}

#if defined(MBEDTLS_SSL_PROTO_DTLS)
int mbedtls_ssl_resend_hello_request( mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_SSL_PROTO_DTLS */

void mbedtls_ssl_set_timer( mbedtls_ssl_context *ssl, uint32_t millisecs );
int mbedtls_ssl_check_timer( mbedtls_ssl_context *ssl );

void mbedtls_ssl_reset_in_out_pointers( mbedtls_ssl_context *ssl );
void mbedtls_ssl_update_out_pointers( mbedtls_ssl_context *ssl,
                              mbedtls_ssl_transform *transform );
void mbedtls_ssl_update_in_pointers( mbedtls_ssl_context *ssl );

int mbedtls_ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial );

#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
void mbedtls_ssl_dtls_replay_reset( mbedtls_ssl_context *ssl );
#endif

void mbedtls_ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl );

#if defined(MBEDTLS_SSL_RENEGOTIATION)
int mbedtls_ssl_start_renegotiation( mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_SSL_RENEGOTIATION */

#if defined(MBEDTLS_SSL_PROTO_DTLS)
size_t mbedtls_ssl_get_current_mtu( const mbedtls_ssl_context *ssl );
void mbedtls_ssl_buffering_free( mbedtls_ssl_context *ssl );
void mbedtls_ssl_flight_free( mbedtls_ssl_flight_item *flight );
#endif /* MBEDTLS_SSL_PROTO_DTLS */

#endif /* ssl_internal.h */


/********* Start of file include/mbedtls/ssl_cache.h ************/

/**
 * \file ssl_cache.h
 *
 * \brief SSL session cache implementation
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SSL_CACHE_H
#define MBEDTLS_SSL_CACHE_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#if defined(MBEDTLS_THREADING_C)

#endif

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */

#if !defined(MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT)
#define MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT       86400   /*!< 1 day  */
#endif

#if !defined(MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES)
#define MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES      50   /*!< Maximum entries in cache */
#endif

/* \} name SECTION: Module settings */

#ifdef __cplusplus
extern "C" {
#endif

typedef struct mbedtls_ssl_cache_context mbedtls_ssl_cache_context;
typedef struct mbedtls_ssl_cache_entry mbedtls_ssl_cache_entry;

/**
 * \brief   This structure is used for storing cache entries
 */
struct mbedtls_ssl_cache_entry
{
#if defined(MBEDTLS_HAVE_TIME)
    mbedtls_time_t timestamp;           /*!< entry timestamp    */
#endif
    mbedtls_ssl_session session;        /*!< entry session      */
#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
    defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
    mbedtls_x509_buf peer_cert;         /*!< entry peer_cert    */
#endif
    mbedtls_ssl_cache_entry *next;      /*!< chain pointer      */
};

/**
 * \brief Cache context
 */
struct mbedtls_ssl_cache_context
{
    mbedtls_ssl_cache_entry *chain;     /*!< start of the chain     */
    int timeout;                /*!< cache entry timeout    */
    int max_entries;            /*!< maximum entries        */
#if defined(MBEDTLS_THREADING_C)
    mbedtls_threading_mutex_t mutex;    /*!< mutex                  */
#endif
};

/**
 * \brief          Initialize an SSL cache context
 *
 * \param cache    SSL cache context
 */
void mbedtls_ssl_cache_init( mbedtls_ssl_cache_context *cache );

/**
 * \brief          Cache get callback implementation
 *                 (Thread-safe if MBEDTLS_THREADING_C is enabled)
 *
 * \param data     SSL cache context
 * \param session  session to retrieve entry for
 */
int mbedtls_ssl_cache_get( void *data, mbedtls_ssl_session *session );

/**
 * \brief          Cache set callback implementation
 *                 (Thread-safe if MBEDTLS_THREADING_C is enabled)
 *
 * \param data     SSL cache context
 * \param session  session to store entry for
 */
int mbedtls_ssl_cache_set( void *data, const mbedtls_ssl_session *session );

#if defined(MBEDTLS_HAVE_TIME)
/**
 * \brief          Set the cache timeout
 *                 (Default: MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT (1 day))
 *
 *                 A timeout of 0 indicates no timeout.
 *
 * \param cache    SSL cache context
 * \param timeout  cache entry timeout in seconds
 */
void mbedtls_ssl_cache_set_timeout( mbedtls_ssl_cache_context *cache, int timeout );
#endif /* MBEDTLS_HAVE_TIME */

/**
 * \brief          Set the maximum number of cache entries
 *                 (Default: MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES (50))
 *
 * \param cache    SSL cache context
 * \param max      cache entry maximum
 */
void mbedtls_ssl_cache_set_max_entries( mbedtls_ssl_cache_context *cache, int max );

/**
 * \brief          Free referenced items in a cache context and clear memory
 *
 * \param cache    SSL cache context
 */
void mbedtls_ssl_cache_free( mbedtls_ssl_cache_context *cache );

#ifdef __cplusplus
}
#endif

#endif /* ssl_cache.h */


/********* Start of file include/mbedtls/ssl_ticket.h ************/

/**
 * \file ssl_ticket.h
 *
 * \brief TLS server ticket callbacks implementation
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_SSL_TICKET_H
#define MBEDTLS_SSL_TICKET_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

/*
 * This implementation of the session ticket callbacks includes key
 * management, rotating the keys periodically in order to preserve forward
 * secrecy, when MBEDTLS_HAVE_TIME is defined.
 */




#if defined(MBEDTLS_THREADING_C)

#endif

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief   Information for session ticket protection
 */
typedef struct mbedtls_ssl_ticket_key
{
    unsigned char name[4];          /*!< random key identifier              */
    uint32_t generation_time;       /*!< key generation timestamp (seconds) */
    mbedtls_cipher_context_t ctx;   /*!< context for auth enc/decryption    */
}
mbedtls_ssl_ticket_key;

/**
 * \brief   Context for session ticket handling functions
 */
typedef struct mbedtls_ssl_ticket_context
{
    mbedtls_ssl_ticket_key keys[2]; /*!< ticket protection keys             */
    unsigned char active;           /*!< index of the currently active key  */

    uint32_t ticket_lifetime;       /*!< lifetime of tickets in seconds     */

    /** Callback for getting (pseudo-)random numbers                        */
    int  (*f_rng)(void *, unsigned char *, size_t);
    void *p_rng;                    /*!< context for the RNG function       */

#if defined(MBEDTLS_THREADING_C)
    mbedtls_threading_mutex_t mutex;
#endif
}
mbedtls_ssl_ticket_context;

/**
 * \brief           Initialize a ticket context.
 *                  (Just make it ready for mbedtls_ssl_ticket_setup()
 *                  or mbedtls_ssl_ticket_free().)
 *
 * \param ctx       Context to be initialized
 */
void mbedtls_ssl_ticket_init( mbedtls_ssl_ticket_context *ctx );

/**
 * \brief           Prepare context to be actually used
 *
 * \param ctx       Context to be set up
 * \param f_rng     RNG callback function
 * \param p_rng     RNG callback context
 * \param cipher    AEAD cipher to use for ticket protection.
 *                  Recommended value: MBEDTLS_CIPHER_AES_256_GCM.
 * \param lifetime  Tickets lifetime in seconds
 *                  Recommended value: 86400 (one day).
 *
 * \note            It is highly recommended to select a cipher that is at
 *                  least as strong as the strongest ciphersuite
 *                  supported. Usually that means a 256-bit key.
 *
 * \note            The lifetime of the keys is twice the lifetime of tickets.
 *                  It is recommended to pick a reasonnable lifetime so as not
 *                  to negate the benefits of forward secrecy.
 *
 * \return          0 if successful,
 *                  or a specific MBEDTLS_ERR_XXX error code
 */
int mbedtls_ssl_ticket_setup( mbedtls_ssl_ticket_context *ctx,
    int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
    mbedtls_cipher_type_t cipher,
    uint32_t lifetime );

/**
 * \brief           Implementation of the ticket write callback
 *
 * \note            See \c mbedtls_ssl_ticket_write_t for description
 */
mbedtls_ssl_ticket_write_t mbedtls_ssl_ticket_write;

/**
 * \brief           Implementation of the ticket parse callback
 *
 * \note            See \c mbedtls_ssl_ticket_parse_t for description
 */
mbedtls_ssl_ticket_parse_t mbedtls_ssl_ticket_parse;

/**
 * \brief           Free a context's content and zeroize it.
 *
 * \param ctx       Context to be cleaned up
 */
void mbedtls_ssl_ticket_free( mbedtls_ssl_ticket_context *ctx );

#ifdef __cplusplus
}
#endif

#endif /* ssl_ticket.h */


/********* Start of file include/mbedtls/debug.h ************/

/**
 * \file debug.h
 *
 * \brief Functions for controlling and providing debug output from the library.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_DEBUG_H
#define MBEDTLS_DEBUG_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#if defined(MBEDTLS_ECP_C)

#endif

#if defined(MBEDTLS_DEBUG_C)

#define MBEDTLS_DEBUG_STRIP_PARENS( ... )   __VA_ARGS__

#define MBEDTLS_SSL_DEBUG_MSG( level, args )                    \
    mbedtls_debug_print_msg( ssl, level, __FILE__, __LINE__,    \
                             MBEDTLS_DEBUG_STRIP_PARENS args )

#define MBEDTLS_SSL_DEBUG_RET( level, text, ret )                \
    mbedtls_debug_print_ret( ssl, level, __FILE__, __LINE__, text, ret )

#define MBEDTLS_SSL_DEBUG_BUF( level, text, buf, len )           \
    mbedtls_debug_print_buf( ssl, level, __FILE__, __LINE__, text, buf, len )

#if defined(MBEDTLS_BIGNUM_C)
#define MBEDTLS_SSL_DEBUG_MPI( level, text, X )                  \
    mbedtls_debug_print_mpi( ssl, level, __FILE__, __LINE__, text, X )
#endif

#if defined(MBEDTLS_ECP_C)
#define MBEDTLS_SSL_DEBUG_ECP( level, text, X )                  \
    mbedtls_debug_print_ecp( ssl, level, __FILE__, __LINE__, text, X )
#endif

#if defined(MBEDTLS_X509_CRT_PARSE_C)
#define MBEDTLS_SSL_DEBUG_CRT( level, text, crt )                \
    mbedtls_debug_print_crt( ssl, level, __FILE__, __LINE__, text, crt )
#endif

#if defined(MBEDTLS_ECDH_C)
#define MBEDTLS_SSL_DEBUG_ECDH( level, ecdh, attr )               \
    mbedtls_debug_printf_ecdh( ssl, level, __FILE__, __LINE__, ecdh, attr )
#endif

#else /* MBEDTLS_DEBUG_C */

#define MBEDTLS_SSL_DEBUG_MSG( level, args )            do { } while( 0 )
#define MBEDTLS_SSL_DEBUG_RET( level, text, ret )       do { } while( 0 )
#define MBEDTLS_SSL_DEBUG_BUF( level, text, buf, len )  do { } while( 0 )
#define MBEDTLS_SSL_DEBUG_MPI( level, text, X )         do { } while( 0 )
#define MBEDTLS_SSL_DEBUG_ECP( level, text, X )         do { } while( 0 )
#define MBEDTLS_SSL_DEBUG_CRT( level, text, crt )       do { } while( 0 )
#define MBEDTLS_SSL_DEBUG_ECDH( level, ecdh, attr )     do { } while( 0 )

#endif /* MBEDTLS_DEBUG_C */

/**
 * \def MBEDTLS_PRINTF_ATTRIBUTE
 *
 * Mark a function as having printf attributes, and thus enable checking
 * via -wFormat and other flags. This does nothing on builds with compilers
 * that do not support the format attribute
 *
 * Module:  library/debug.c
 * Caller:
 *
 * This module provides debugging functions.
 */
#if defined(__has_attribute)
#if __has_attribute(format)
#if defined(__MINGW32__) && __USE_MINGW_ANSI_STDIO == 1
#define MBEDTLS_PRINTF_ATTRIBUTE(string_index, first_to_check)    \
    __attribute__((__format__ (gnu_printf, string_index, first_to_check)))
#else /* defined(__MINGW32__) && __USE_MINGW_ANSI_STDIO == 1 */
#define MBEDTLS_PRINTF_ATTRIBUTE(string_index, first_to_check)    \
    __attribute__((format(printf, string_index, first_to_check)))
#endif
#else /* __has_attribute(format) */
#define MBEDTLS_PRINTF_ATTRIBUTE(string_index, first_to_check)
#endif /* __has_attribute(format) */
#else /* defined(__has_attribute) */
#define MBEDTLS_PRINTF_ATTRIBUTE(string_index, first_to_check)
#endif

/**
 * \def MBEDTLS_PRINTF_SIZET
 *
 * MBEDTLS_PRINTF_xxx: Due to issues with older window compilers
 * and MinGW we need to define the printf specifier for size_t
 * and long long per platform.
 *
 * Module:  library/debug.c
 * Caller:
 *
 * This module provides debugging functions.
 */
#if (defined(__MINGW32__) && __USE_MINGW_ANSI_STDIO == 0) || (defined(_MSC_VER) && _MSC_VER < 1800)
   #include <inttypes.h>
   #define MBEDTLS_PRINTF_SIZET     PRIuPTR
   #define MBEDTLS_PRINTF_LONGLONG  "I64d"
#else /* (defined(__MINGW32__)  && __USE_MINGW_ANSI_STDIO == 0) || (defined(_MSC_VER) && _MSC_VER < 1800) */
   #define MBEDTLS_PRINTF_SIZET     "zu"
   #define MBEDTLS_PRINTF_LONGLONG  "lld"
#endif /* (defined(__MINGW32__)  && __USE_MINGW_ANSI_STDIO == 0) || (defined(_MSC_VER) && _MSC_VER < 1800) */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief   Set the threshold error level to handle globally all debug output.
 *          Debug messages that have a level over the threshold value are
 *          discarded.
 *          (Default value: 0 = No debug )
 *
 * \param threshold     theshold level of messages to filter on. Messages at a
 *                      higher level will be discarded.
 *                          - Debug levels
 *                              - 0 No debug
 *                              - 1 Error
 *                              - 2 State change
 *                              - 3 Informational
 *                              - 4 Verbose
 */
void mbedtls_debug_set_threshold( int threshold );

/**
 * \brief    Print a message to the debug output. This function is always used
 *          through the MBEDTLS_SSL_DEBUG_MSG() macro, which supplies the ssl
 *          context, file and line number parameters.
 *
 * \param ssl       SSL context
 * \param level     error level of the debug message
 * \param file      file the message has occurred in
 * \param line      line number the message has occurred at
 * \param format    format specifier, in printf format
 * \param ...       variables used by the format specifier
 *
 * \attention       This function is intended for INTERNAL usage within the
 *                  library only.
 */
void mbedtls_debug_print_msg( const mbedtls_ssl_context *ssl, int level,
                              const char *file, int line,
                              const char *format, ... ) MBEDTLS_PRINTF_ATTRIBUTE(5, 6);

/**
 * \brief   Print the return value of a function to the debug output. This
 *          function is always used through the MBEDTLS_SSL_DEBUG_RET() macro,
 *          which supplies the ssl context, file and line number parameters.
 *
 * \param ssl       SSL context
 * \param level     error level of the debug message
 * \param file      file the error has occurred in
 * \param line      line number the error has occurred in
 * \param text      the name of the function that returned the error
 * \param ret       the return code value
 *
 * \attention       This function is intended for INTERNAL usage within the
 *                  library only.
 */
void mbedtls_debug_print_ret( const mbedtls_ssl_context *ssl, int level,
                      const char *file, int line,
                      const char *text, int ret );

/**
 * \brief   Output a buffer of size len bytes to the debug output. This function
 *          is always used through the MBEDTLS_SSL_DEBUG_BUF() macro,
 *          which supplies the ssl context, file and line number parameters.
 *
 * \param ssl       SSL context
 * \param level     error level of the debug message
 * \param file      file the error has occurred in
 * \param line      line number the error has occurred in
 * \param text      a name or label for the buffer being dumped. Normally the
 *                  variable or buffer name
 * \param buf       the buffer to be outputted
 * \param len       length of the buffer
 *
 * \attention       This function is intended for INTERNAL usage within the
 *                  library only.
 */
void mbedtls_debug_print_buf( const mbedtls_ssl_context *ssl, int level,
                      const char *file, int line, const char *text,
                      const unsigned char *buf, size_t len );

#if defined(MBEDTLS_BIGNUM_C)
/**
 * \brief   Print a MPI variable to the debug output. This function is always
 *          used through the MBEDTLS_SSL_DEBUG_MPI() macro, which supplies the
 *          ssl context, file and line number parameters.
 *
 * \param ssl       SSL context
 * \param level     error level of the debug message
 * \param file      file the error has occurred in
 * \param line      line number the error has occurred in
 * \param text      a name or label for the MPI being output. Normally the
 *                  variable name
 * \param X         the MPI variable
 *
 * \attention       This function is intended for INTERNAL usage within the
 *                  library only.
 */
void mbedtls_debug_print_mpi( const mbedtls_ssl_context *ssl, int level,
                      const char *file, int line,
                      const char *text, const mbedtls_mpi *X );
#endif

#if defined(MBEDTLS_ECP_C)
/**
 * \brief   Print an ECP point to the debug output. This function is always
 *          used through the MBEDTLS_SSL_DEBUG_ECP() macro, which supplies the
 *          ssl context, file and line number parameters.
 *
 * \param ssl       SSL context
 * \param level     error level of the debug message
 * \param file      file the error has occurred in
 * \param line      line number the error has occurred in
 * \param text      a name or label for the ECP point being output. Normally the
 *                  variable name
 * \param X         the ECP point
 *
 * \attention       This function is intended for INTERNAL usage within the
 *                  library only.
 */
void mbedtls_debug_print_ecp( const mbedtls_ssl_context *ssl, int level,
                      const char *file, int line,
                      const char *text, const mbedtls_ecp_point *X );
#endif

#if defined(MBEDTLS_X509_CRT_PARSE_C)
/**
 * \brief   Print a X.509 certificate structure to the debug output. This
 *          function is always used through the MBEDTLS_SSL_DEBUG_CRT() macro,
 *          which supplies the ssl context, file and line number parameters.
 *
 * \param ssl       SSL context
 * \param level     error level of the debug message
 * \param file      file the error has occurred in
 * \param line      line number the error has occurred in
 * \param text      a name or label for the certificate being output
 * \param crt       X.509 certificate structure
 *
 * \attention       This function is intended for INTERNAL usage within the
 *                  library only.
 */
void mbedtls_debug_print_crt( const mbedtls_ssl_context *ssl, int level,
                      const char *file, int line,
                      const char *text, const mbedtls_x509_crt *crt );
#endif

#if defined(MBEDTLS_ECDH_C)
typedef enum
{
    MBEDTLS_DEBUG_ECDH_Q,
    MBEDTLS_DEBUG_ECDH_QP,
    MBEDTLS_DEBUG_ECDH_Z,
} mbedtls_debug_ecdh_attr;

/**
 * \brief   Print a field of the ECDH structure in the SSL context to the debug
 *          output. This function is always used through the
 *          MBEDTLS_SSL_DEBUG_ECDH() macro, which supplies the ssl context, file
 *          and line number parameters.
 *
 * \param ssl       SSL context
 * \param level     error level of the debug message
 * \param file      file the error has occurred in
 * \param line      line number the error has occurred in
 * \param ecdh      the ECDH context
 * \param attr      the identifier of the attribute being output
 *
 * \attention       This function is intended for INTERNAL usage within the
 *                  library only.
 */
void mbedtls_debug_printf_ecdh( const mbedtls_ssl_context *ssl, int level,
                                const char *file, int line,
                                const mbedtls_ecdh_context *ecdh,
                                mbedtls_debug_ecdh_attr attr );
#endif

#ifdef __cplusplus
}
#endif

#endif /* debug.h */


/********* Start of file include/mbedtls/blowfish.h ************/

/**
 * \file blowfish.h
 *
 * \brief Blowfish block cipher
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_BLOWFISH_H
#define MBEDTLS_BLOWFISH_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>



#define MBEDTLS_BLOWFISH_ENCRYPT     1
#define MBEDTLS_BLOWFISH_DECRYPT     0
#define MBEDTLS_BLOWFISH_MAX_KEY_BITS     448
#define MBEDTLS_BLOWFISH_MIN_KEY_BITS     32
#define MBEDTLS_BLOWFISH_ROUNDS      16         /**< Rounds to use. When increasing this value, make sure to extend the initialisation vectors */
#define MBEDTLS_BLOWFISH_BLOCKSIZE   8          /* Blowfish uses 64 bit blocks */

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#define MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH   MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( -0x0016 )
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
/** Bad input data. */
#define MBEDTLS_ERR_BLOWFISH_BAD_INPUT_DATA -0x0016

/** Invalid data input length. */
#define MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH -0x0018

/* MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED is deprecated and should not be used.
 */
/** Blowfish hardware accelerator failed. */
#define MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED                   -0x0017

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_BLOWFISH_ALT)
// Regular implementation
//

/**
 * \brief          Blowfish context structure
 */
typedef struct mbedtls_blowfish_context
{
    uint32_t P[MBEDTLS_BLOWFISH_ROUNDS + 2];    /*!<  Blowfish round keys    */
    uint32_t S[4][256];                 /*!<  key dependent S-boxes  */
}
mbedtls_blowfish_context;

#else  /* MBEDTLS_BLOWFISH_ALT */

#endif /* MBEDTLS_BLOWFISH_ALT */

/**
 * \brief          Initialize a Blowfish context.
 *
 * \param ctx      The Blowfish context to be initialized.
 *                 This must not be \c NULL.
 */
void mbedtls_blowfish_init( mbedtls_blowfish_context *ctx );

/**
 * \brief          Clear a Blowfish context.
 *
 * \param ctx      The Blowfish context to be cleared.
 *                 This may be \c NULL, in which case this function
 *                 returns immediately. If it is not \c NULL, it must
 *                 point to an initialized Blowfish context.
 */
void mbedtls_blowfish_free( mbedtls_blowfish_context *ctx );

/**
 * \brief          Perform a Blowfish key schedule operation.
 *
 * \param ctx      The Blowfish context to perform the key schedule on.
 * \param key      The encryption key. This must be a readable buffer of
 *                 length \p keybits Bits.
 * \param keybits  The length of \p key in Bits. This must be between
 *                 \c 32 and \c 448 and a multiple of \c 8.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_blowfish_setkey( mbedtls_blowfish_context *ctx, const unsigned char *key,
                     unsigned int keybits );

/**
 * \brief          Perform a Blowfish-ECB block encryption/decryption operation.
 *
 * \param ctx      The Blowfish context to use. This must be initialized
 *                 and bound to a key.
 * \param mode     The mode of operation. Possible values are
 *                 #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
 *                 #MBEDTLS_BLOWFISH_DECRYPT for decryption.
 * \param input    The input block. This must be a readable buffer
 *                 of size \c 8 Bytes.
 * \param output   The output block. This must be a writable buffer
 *                 of size \c 8 Bytes.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_blowfish_crypt_ecb( mbedtls_blowfish_context *ctx,
                        int mode,
                        const unsigned char input[MBEDTLS_BLOWFISH_BLOCKSIZE],
                        unsigned char output[MBEDTLS_BLOWFISH_BLOCKSIZE] );

#if defined(MBEDTLS_CIPHER_MODE_CBC)
/**
 * \brief          Perform a Blowfish-CBC buffer encryption/decryption operation.
 *
 * \note           Upon exit, the content of the IV is updated so that you can
 *                 call the function same function again on the following
 *                 block(s) of data and get the same result as if it was
 *                 encrypted in one call. This allows a "streaming" usage.
 *                 If on the other hand you need to retain the contents of the
 *                 IV, you should either save it manually or use the cipher
 *                 module instead.
 *
 * \param ctx      The Blowfish context to use. This must be initialized
 *                 and bound to a key.
 * \param mode     The mode of operation. Possible values are
 *                 #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
 *                 #MBEDTLS_BLOWFISH_DECRYPT for decryption.
 * \param length   The length of the input data in Bytes. This must be
 *                 multiple of \c 8.
 * \param iv       The initialization vector. This must be a read/write buffer
 *                 of length \c 8 Bytes. It is updated by this function.
 * \param input    The input data. This must be a readable buffer of length
 *                 \p length Bytes.
 * \param output   The output data. This must be a writable buffer of length
 *                 \p length Bytes.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_blowfish_crypt_cbc( mbedtls_blowfish_context *ctx,
                        int mode,
                        size_t length,
                        unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE],
                        const unsigned char *input,
                        unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CBC */

#if defined(MBEDTLS_CIPHER_MODE_CFB)
/**
 * \brief          Perform a Blowfish CFB buffer encryption/decryption operation.
 *
 * \note           Upon exit, the content of the IV is updated so that you can
 *                 call the function same function again on the following
 *                 block(s) of data and get the same result as if it was
 *                 encrypted in one call. This allows a "streaming" usage.
 *                 If on the other hand you need to retain the contents of the
 *                 IV, you should either save it manually or use the cipher
 *                 module instead.
 *
 * \param ctx      The Blowfish context to use. This must be initialized
 *                 and bound to a key.
 * \param mode     The mode of operation. Possible values are
 *                 #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
 *                 #MBEDTLS_BLOWFISH_DECRYPT for decryption.
 * \param length   The length of the input data in Bytes.
 * \param iv_off   The offset in the initialiation vector.
 *                 The value pointed to must be smaller than \c 8 Bytes.
 *                 It is updated by this function to support the aforementioned
 *                 streaming usage.
 * \param iv       The initialization vector. This must be a read/write buffer
 *                 of size \c 8 Bytes. It is updated after use.
 * \param input    The input data. This must be a readable buffer of length
 *                 \p length Bytes.
 * \param output   The output data. This must be a writable buffer of length
 *                 \p length Bytes.
 *
 * \return         \c 0 if successful.
 * \return         A negative error code on failure.
 */
int mbedtls_blowfish_crypt_cfb64( mbedtls_blowfish_context *ctx,
                          int mode,
                          size_t length,
                          size_t *iv_off,
                          unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE],
                          const unsigned char *input,
                          unsigned char *output );
#endif /*MBEDTLS_CIPHER_MODE_CFB */

#if defined(MBEDTLS_CIPHER_MODE_CTR)
/**
 * \brief      Perform a Blowfish-CTR buffer encryption/decryption operation.
 *
 * \warning    You must never reuse a nonce value with the same key. Doing so
 *             would void the encryption for the two messages encrypted with
 *             the same nonce and key.
 *
 *             There are two common strategies for managing nonces with CTR:
 *
 *             1. You can handle everything as a single message processed over
 *             successive calls to this function. In that case, you want to
 *             set \p nonce_counter and \p nc_off to 0 for the first call, and
 *             then preserve the values of \p nonce_counter, \p nc_off and \p
 *             stream_block across calls to this function as they will be
 *             updated by this function.
 *
 *             With this strategy, you must not encrypt more than 2**64
 *             blocks of data with the same key.
 *
 *             2. You can encrypt separate messages by dividing the \p
 *             nonce_counter buffer in two areas: the first one used for a
 *             per-message nonce, handled by yourself, and the second one
 *             updated by this function internally.
 *
 *             For example, you might reserve the first 4 bytes for the
 *             per-message nonce, and the last 4 bytes for internal use. In that
 *             case, before calling this function on a new message you need to
 *             set the first 4 bytes of \p nonce_counter to your chosen nonce
 *             value, the last 4 to 0, and \p nc_off to 0 (which will cause \p
 *             stream_block to be ignored). That way, you can encrypt at most
 *             2**32 messages of up to 2**32 blocks each with the same key.
 *
 *             The per-message nonce (or information sufficient to reconstruct
 *             it) needs to be communicated with the ciphertext and must be unique.
 *             The recommended way to ensure uniqueness is to use a message
 *             counter.
 *
 *             Note that for both stategies, sizes are measured in blocks and
 *             that a Blowfish block is 8 bytes.
 *
 * \warning    Upon return, \p stream_block contains sensitive data. Its
 *             content must not be written to insecure storage and should be
 *             securely discarded as soon as it's no longer needed.
 *
 * \param ctx           The Blowfish context to use. This must be initialized
 *                      and bound to a key.
 * \param length        The length of the input data in Bytes.
 * \param nc_off        The offset in the current stream_block (for resuming
 *                      within current cipher stream). The offset pointer
 *                      should be \c 0 at the start of a stream and must be
 *                      smaller than \c 8. It is updated by this function.
 * \param nonce_counter The 64-bit nonce and counter. This must point to a
 *                      read/write buffer of length \c 8 Bytes.
 * \param stream_block  The saved stream-block for resuming. This must point to
 *                      a read/write buffer of length \c 8 Bytes.
 * \param input         The input data. This must be a readable buffer of
 *                      length \p length Bytes.
 * \param output        The output data. This must be a writable buffer of
 *                      length \p length Bytes.
 *
 * \return              \c 0 if successful.
 * \return              A negative error code on failure.
 */
int mbedtls_blowfish_crypt_ctr( mbedtls_blowfish_context *ctx,
                        size_t length,
                        size_t *nc_off,
                        unsigned char nonce_counter[MBEDTLS_BLOWFISH_BLOCKSIZE],
                        unsigned char stream_block[MBEDTLS_BLOWFISH_BLOCKSIZE],
                        const unsigned char *input,
                        unsigned char *output );
#endif /* MBEDTLS_CIPHER_MODE_CTR */

#ifdef __cplusplus
}
#endif

#endif /* blowfish.h */


/********* Start of file include/mbedtls/ccm.h ************/

/**
 * \file ccm.h
 *
 * \brief This file provides an API for the CCM authenticated encryption
 *        mode for block ciphers.
 *
 * CCM combines Counter mode encryption with CBC-MAC authentication
 * for 128-bit block ciphers.
 *
 * Input to CCM includes the following elements:
 * <ul><li>Payload - data that is both authenticated and encrypted.</li>
 * <li>Associated data (Adata) - data that is authenticated but not
 * encrypted, For example, a header.</li>
 * <li>Nonce - A unique value that is assigned to the payload and the
 * associated data.</li></ul>
 *
 * Definition of CCM:
 * http://csrc.nist.gov/publications/nistpubs/800-38C/SP800-38C_updated-July20_2007.pdf
 * RFC 3610 "Counter with CBC-MAC (CCM)"
 *
 * Related:
 * RFC 5116 "An Interface and Algorithms for Authenticated Encryption"
 *
 * Definition of CCM*:
 * IEEE 802.15.4 - IEEE Standard for Local and metropolitan area networks
 * Integer representation is fixed most-significant-octet-first order and
 * the representation of octets is most-significant-bit-first order. This is
 * consistent with RFC 3610.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_CCM_H
#define MBEDTLS_CCM_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



/** Bad input parameters to the function. */
#define MBEDTLS_ERR_CCM_BAD_INPUT       -0x000D
/** Authenticated decryption failed. */
#define MBEDTLS_ERR_CCM_AUTH_FAILED     -0x000F

/* MBEDTLS_ERR_CCM_HW_ACCEL_FAILED is deprecated and should not be used. */
/** CCM hardware accelerator failed. */
#define MBEDTLS_ERR_CCM_HW_ACCEL_FAILED -0x0011

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_CCM_ALT)
// Regular implementation
//

/**
 * \brief    The CCM context-type definition. The CCM context is passed
 *           to the APIs called.
 */
typedef struct mbedtls_ccm_context
{
    mbedtls_cipher_context_t cipher_ctx;    /*!< The cipher context used. */
}
mbedtls_ccm_context;

#else  /* MBEDTLS_CCM_ALT */

#endif /* MBEDTLS_CCM_ALT */

/**
 * \brief           This function initializes the specified CCM context,
 *                  to make references valid, and prepare the context
 *                  for mbedtls_ccm_setkey() or mbedtls_ccm_free().
 *
 * \param ctx       The CCM context to initialize. This must not be \c NULL.
 */
void mbedtls_ccm_init( mbedtls_ccm_context *ctx );

/**
 * \brief           This function initializes the CCM context set in the
 *                  \p ctx parameter and sets the encryption key.
 *
 * \param ctx       The CCM context to initialize. This must be an initialized
 *                  context.
 * \param cipher    The 128-bit block cipher to use.
 * \param key       The encryption key. This must not be \c NULL.
 * \param keybits   The key size in bits. This must be acceptable by the cipher.
 *
 * \return          \c 0 on success.
 * \return          A CCM or cipher-specific error code on failure.
 */
int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
                        mbedtls_cipher_id_t cipher,
                        const unsigned char *key,
                        unsigned int keybits );

/**
 * \brief   This function releases and clears the specified CCM context
 *          and underlying cipher sub-context.
 *
 * \param ctx       The CCM context to clear. If this is \c NULL, the function
 *                  has no effect. Otherwise, this must be initialized.
 */
void mbedtls_ccm_free( mbedtls_ccm_context *ctx );

/**
 * \brief           This function encrypts a buffer using CCM.
 *
 * \note            The tag is written to a separate buffer. To concatenate
 *                  the \p tag with the \p output, as done in <em>RFC-3610:
 *                  Counter with CBC-MAC (CCM)</em>, use
 *                  \p tag = \p output + \p length, and make sure that the
 *                  output buffer is at least \p length + \p tag_len wide.
 *
 * \param ctx       The CCM context to use for encryption. This must be
 *                  initialized and bound to a key.
 * \param length    The length of the input data in Bytes.
 * \param iv        The initialization vector (nonce). This must be a readable
 *                  buffer of at least \p iv_len Bytes.
 * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
 *                  or 13. The length L of the message length field is
 *                  15 - \p iv_len.
 * \param add       The additional data field. If \p add_len is greater than
 *                  zero, \p add must be a readable buffer of at least that
 *                  length.
 * \param add_len   The length of additional data in Bytes.
 *                  This must be less than `2^16 - 2^8`.
 * \param input     The buffer holding the input data. If \p length is greater
 *                  than zero, \p input must be a readable buffer of at least
 *                  that length.
 * \param output    The buffer holding the output data. If \p length is greater
 *                  than zero, \p output must be a writable buffer of at least
 *                  that length.
 * \param tag       The buffer holding the authentication field. This must be a
 *                  writable buffer of at least \p tag_len Bytes.
 * \param tag_len   The length of the authentication field to generate in Bytes:
 *                  4, 6, 8, 10, 12, 14 or 16.
 *
 * \return          \c 0 on success.
 * \return          A CCM or cipher-specific error code on failure.
 */
int mbedtls_ccm_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
                         const unsigned char *iv, size_t iv_len,
                         const unsigned char *add, size_t add_len,
                         const unsigned char *input, unsigned char *output,
                         unsigned char *tag, size_t tag_len );

/**
 * \brief           This function encrypts a buffer using CCM*.
 *
 * \note            The tag is written to a separate buffer. To concatenate
 *                  the \p tag with the \p output, as done in <em>RFC-3610:
 *                  Counter with CBC-MAC (CCM)</em>, use
 *                  \p tag = \p output + \p length, and make sure that the
 *                  output buffer is at least \p length + \p tag_len wide.
 *
 * \note            When using this function in a variable tag length context,
 *                  the tag length has to be encoded into the \p iv passed to
 *                  this function.
 *
 * \param ctx       The CCM context to use for encryption. This must be
 *                  initialized and bound to a key.
 * \param length    The length of the input data in Bytes.
 * \param iv        The initialization vector (nonce). This must be a readable
 *                  buffer of at least \p iv_len Bytes.
 * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
 *                  or 13. The length L of the message length field is
 *                  15 - \p iv_len.
 * \param add       The additional data field. This must be a readable buffer of
 *                  at least \p add_len Bytes.
 * \param add_len   The length of additional data in Bytes.
 *                  This must be less than 2^16 - 2^8.
 * \param input     The buffer holding the input data. If \p length is greater
 *                  than zero, \p input must be a readable buffer of at least
 *                  that length.
 * \param output    The buffer holding the output data. If \p length is greater
 *                  than zero, \p output must be a writable buffer of at least
 *                  that length.
 * \param tag       The buffer holding the authentication field. This must be a
 *                  writable buffer of at least \p tag_len Bytes.
 * \param tag_len   The length of the authentication field to generate in Bytes:
 *                  0, 4, 6, 8, 10, 12, 14 or 16.
 *
 * \warning         Passing \c 0 as \p tag_len means that the message is no
 *                  longer authenticated.
 *
 * \return          \c 0 on success.
 * \return          A CCM or cipher-specific error code on failure.
 */
int mbedtls_ccm_star_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
                         const unsigned char *iv, size_t iv_len,
                         const unsigned char *add, size_t add_len,
                         const unsigned char *input, unsigned char *output,
                         unsigned char *tag, size_t tag_len );

/**
 * \brief           This function performs a CCM authenticated decryption of a
 *                  buffer.
 *
 * \param ctx       The CCM context to use for decryption. This must be
 *                  initialized and bound to a key.
 * \param length    The length of the input data in Bytes.
 * \param iv        The initialization vector (nonce). This must be a readable
 *                  buffer of at least \p iv_len Bytes.
 * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
 *                  or 13. The length L of the message length field is
 *                  15 - \p iv_len.
 * \param add       The additional data field. This must be a readable buffer
 *                  of at least that \p add_len Bytes..
 * \param add_len   The length of additional data in Bytes.
 *                  This must be less than 2^16 - 2^8.
 * \param input     The buffer holding the input data. If \p length is greater
 *                  than zero, \p input must be a readable buffer of at least
 *                  that length.
 * \param output    The buffer holding the output data. If \p length is greater
 *                  than zero, \p output must be a writable buffer of at least
 *                  that length.
 * \param tag       The buffer holding the authentication field. This must be a
 *                  readable buffer of at least \p tag_len Bytes.
 * \param tag_len   The length of the authentication field to generate in Bytes:
 *                  4, 6, 8, 10, 12, 14 or 16.
 *
 * \return          \c 0 on success. This indicates that the message is authentic.
 * \return          #MBEDTLS_ERR_CCM_AUTH_FAILED if the tag does not match.
 * \return          A cipher-specific error code on calculation failure.
 */
int mbedtls_ccm_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
                      const unsigned char *iv, size_t iv_len,
                      const unsigned char *add, size_t add_len,
                      const unsigned char *input, unsigned char *output,
                      const unsigned char *tag, size_t tag_len );

/**
 * \brief           This function performs a CCM* authenticated decryption of a
 *                  buffer.
 *
 * \note            When using this function in a variable tag length context,
 *                  the tag length has to be decoded from \p iv and passed to
 *                  this function as \p tag_len. (\p tag needs to be adjusted
 *                  accordingly.)
 *
 * \param ctx       The CCM context to use for decryption. This must be
 *                  initialized and bound to a key.
 * \param length    The length of the input data in Bytes.
 * \param iv        The initialization vector (nonce). This must be a readable
 *                  buffer of at least \p iv_len Bytes.
 * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
 *                  or 13. The length L of the message length field is
 *                  15 - \p iv_len.
 * \param add       The additional data field. This must be a readable buffer of
 *                  at least that \p add_len Bytes.
 * \param add_len   The length of additional data in Bytes.
 *                  This must be less than 2^16 - 2^8.
 * \param input     The buffer holding the input data. If \p length is greater
 *                  than zero, \p input must be a readable buffer of at least
 *                  that length.
 * \param output    The buffer holding the output data. If \p length is greater
 *                  than zero, \p output must be a writable buffer of at least
 *                  that length.
 * \param tag       The buffer holding the authentication field. This must be a
 *                  readable buffer of at least \p tag_len Bytes.
 * \param tag_len   The length of the authentication field in Bytes.
 *                  0, 4, 6, 8, 10, 12, 14 or 16.
 *
 * \warning         Passing \c 0 as \p tag_len means that the message is nos
 *                  longer authenticated.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_CCM_AUTH_FAILED if the tag does not match.
 * \return          A cipher-specific error code on calculation failure.
 */
int mbedtls_ccm_star_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
                      const unsigned char *iv, size_t iv_len,
                      const unsigned char *add, size_t add_len,
                      const unsigned char *input, unsigned char *output,
                      const unsigned char *tag, size_t tag_len );

#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
/**
 * \brief          The CCM checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
int mbedtls_ccm_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_CCM_H */


/********* Start of file include/mbedtls/gcm.h ************/

/**
 * \file gcm.h
 *
 * \brief This file contains GCM definitions and functions.
 *
 * The Galois/Counter Mode (GCM) for 128-bit block ciphers is defined
 * in <em>D. McGrew, J. Viega, The Galois/Counter Mode of Operation
 * (GCM), Natl. Inst. Stand. Technol.</em>
 *
 * For more information on GCM, see <em>NIST SP 800-38D: Recommendation for
 * Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC</em>.
 *
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef MBEDTLS_GCM_H
#define MBEDTLS_GCM_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#include <stdint.h>

#define MBEDTLS_GCM_ENCRYPT     1
#define MBEDTLS_GCM_DECRYPT     0

/** Authenticated decryption failed. */
#define MBEDTLS_ERR_GCM_AUTH_FAILED                       -0x0012

/* MBEDTLS_ERR_GCM_HW_ACCEL_FAILED is deprecated and should not be used. */
/** GCM hardware accelerator failed. */
#define MBEDTLS_ERR_GCM_HW_ACCEL_FAILED                   -0x0013

/** Bad input parameters to function. */
#define MBEDTLS_ERR_GCM_BAD_INPUT                         -0x0014

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_GCM_ALT)

/**
 * \brief          The GCM context structure.
 */
typedef struct mbedtls_gcm_context
{
    mbedtls_cipher_context_t cipher_ctx;  /*!< The cipher context used. */
    uint64_t HL[16];                      /*!< Precalculated HTable low. */
    uint64_t HH[16];                      /*!< Precalculated HTable high. */
    uint64_t len;                         /*!< The total length of the encrypted data. */
    uint64_t add_len;                     /*!< The total length of the additional data. */
    unsigned char base_ectr[16];          /*!< The first ECTR for tag. */
    unsigned char y[16];                  /*!< The Y working value. */
    unsigned char buf[16];                /*!< The buf working value. */
    int mode;                             /*!< The operation to perform:
                                               #MBEDTLS_GCM_ENCRYPT or
                                               #MBEDTLS_GCM_DECRYPT. */
}
mbedtls_gcm_context;

#else  /* !MBEDTLS_GCM_ALT */

#endif /* !MBEDTLS_GCM_ALT */

/**
 * \brief           This function initializes the specified GCM context,
 *                  to make references valid, and prepares the context
 *                  for mbedtls_gcm_setkey() or mbedtls_gcm_free().
 *
 *                  The function does not bind the GCM context to a particular
 *                  cipher, nor set the key. For this purpose, use
 *                  mbedtls_gcm_setkey().
 *
 * \param ctx       The GCM context to initialize. This must not be \c NULL.
 */
void mbedtls_gcm_init( mbedtls_gcm_context *ctx );

/**
 * \brief           This function associates a GCM context with a
 *                  cipher algorithm and a key.
 *
 * \param ctx       The GCM context. This must be initialized.
 * \param cipher    The 128-bit block cipher to use.
 * \param key       The encryption key. This must be a readable buffer of at
 *                  least \p keybits bits.
 * \param keybits   The key size in bits. Valid options are:
 *                  <ul><li>128 bits</li>
 *                  <li>192 bits</li>
 *                  <li>256 bits</li></ul>
 *
 * \return          \c 0 on success.
 * \return          A cipher-specific error code on failure.
 */
int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
                        mbedtls_cipher_id_t cipher,
                        const unsigned char *key,
                        unsigned int keybits );

/**
 * \brief           This function performs GCM encryption or decryption of a buffer.
 *
 * \note            For encryption, the output buffer can be the same as the
 *                  input buffer. For decryption, the output buffer cannot be
 *                  the same as input buffer. If the buffers overlap, the output
 *                  buffer must trail at least 8 Bytes behind the input buffer.
 *
 * \warning         When this function performs a decryption, it outputs the
 *                  authentication tag and does not verify that the data is
 *                  authentic. You should use this function to perform encryption
 *                  only. For decryption, use mbedtls_gcm_auth_decrypt() instead.
 *
 * \param ctx       The GCM context to use for encryption or decryption. This
 *                  must be initialized.
 * \param mode      The operation to perform:
 *                  - #MBEDTLS_GCM_ENCRYPT to perform authenticated encryption.
 *                    The ciphertext is written to \p output and the
 *                    authentication tag is written to \p tag.
 *                  - #MBEDTLS_GCM_DECRYPT to perform decryption.
 *                    The plaintext is written to \p output and the
 *                    authentication tag is written to \p tag.
 *                    Note that this mode is not recommended, because it does
 *                    not verify the authenticity of the data. For this reason,
 *                    you should use mbedtls_gcm_auth_decrypt() instead of
 *                    calling this function in decryption mode.
 * \param length    The length of the input data, which is equal to the length
 *                  of the output data.
 * \param iv        The initialization vector. This must be a readable buffer of
 *                  at least \p iv_len Bytes.
 * \param iv_len    The length of the IV.
 * \param add       The buffer holding the additional data. This must be of at
 *                  least that size in Bytes.
 * \param add_len   The length of the additional data.
 * \param input     The buffer holding the input data. If \p length is greater
 *                  than zero, this must be a readable buffer of at least that
 *                  size in Bytes.
 * \param output    The buffer for holding the output data. If \p length is greater
 *                  than zero, this must be a writable buffer of at least that
 *                  size in Bytes.
 * \param tag_len   The length of the tag to generate.
 * \param tag       The buffer for holding the tag. This must be a writable
 *                  buffer of at least \p tag_len Bytes.
 *
 * \return          \c 0 if the encryption or decryption was performed
 *                  successfully. Note that in #MBEDTLS_GCM_DECRYPT mode,
 *                  this does not indicate that the data is authentic.
 * \return          #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths or pointers are
 *                  not valid or a cipher-specific error code if the encryption
 *                  or decryption failed.
 */
int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
                       int mode,
                       size_t length,
                       const unsigned char *iv,
                       size_t iv_len,
                       const unsigned char *add,
                       size_t add_len,
                       const unsigned char *input,
                       unsigned char *output,
                       size_t tag_len,
                       unsigned char *tag );

/**
 * \brief           This function performs a GCM authenticated decryption of a
 *                  buffer.
 *
 * \note            For decryption, the output buffer cannot be the same as
 *                  input buffer. If the buffers overlap, the output buffer
 *                  must trail at least 8 Bytes behind the input buffer.
 *
 * \param ctx       The GCM context. This must be initialized.
 * \param length    The length of the ciphertext to decrypt, which is also
 *                  the length of the decrypted plaintext.
 * \param iv        The initialization vector. This must be a readable buffer
 *                  of at least \p iv_len Bytes.
 * \param iv_len    The length of the IV.
 * \param add       The buffer holding the additional data. This must be of at
 *                  least that size in Bytes.
 * \param add_len   The length of the additional data.
 * \param tag       The buffer holding the tag to verify. This must be a
 *                  readable buffer of at least \p tag_len Bytes.
 * \param tag_len   The length of the tag to verify.
 * \param input     The buffer holding the ciphertext. If \p length is greater
 *                  than zero, this must be a readable buffer of at least that
 *                  size.
 * \param output    The buffer for holding the decrypted plaintext. If \p length
 *                  is greater than zero, this must be a writable buffer of at
 *                  least that size.
 *
 * \return          \c 0 if successful and authenticated.
 * \return          #MBEDTLS_ERR_GCM_AUTH_FAILED if the tag does not match.
 * \return          #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths or pointers are
 *                  not valid or a cipher-specific error code if the decryption
 *                  failed.
 */
int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
                      size_t length,
                      const unsigned char *iv,
                      size_t iv_len,
                      const unsigned char *add,
                      size_t add_len,
                      const unsigned char *tag,
                      size_t tag_len,
                      const unsigned char *input,
                      unsigned char *output );

/**
 * \brief           This function starts a GCM encryption or decryption
 *                  operation.
 *
 * \param ctx       The GCM context. This must be initialized.
 * \param mode      The operation to perform: #MBEDTLS_GCM_ENCRYPT or
 *                  #MBEDTLS_GCM_DECRYPT.
 * \param iv        The initialization vector. This must be a readable buffer of
 *                  at least \p iv_len Bytes.
 * \param iv_len    The length of the IV.
 * \param add       The buffer holding the additional data, or \c NULL
 *                  if \p add_len is \c 0.
 * \param add_len   The length of the additional data. If \c 0,
 *                  \p add may be \c NULL.
 *
 * \return          \c 0 on success.
 */
int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
                int mode,
                const unsigned char *iv,
                size_t iv_len,
                const unsigned char *add,
                size_t add_len );

/**
 * \brief           This function feeds an input buffer into an ongoing GCM
 *                  encryption or decryption operation.
 *
 *    `             The function expects input to be a multiple of 16
 *                  Bytes. Only the last call before calling
 *                  mbedtls_gcm_finish() can be less than 16 Bytes.
 *
 * \note            For decryption, the output buffer cannot be the same as
 *                  input buffer. If the buffers overlap, the output buffer
 *                  must trail at least 8 Bytes behind the input buffer.
 *
 * \param ctx       The GCM context. This must be initialized.
 * \param length    The length of the input data. This must be a multiple of
 *                  16 except in the last call before mbedtls_gcm_finish().
 * \param input     The buffer holding the input data. If \p length is greater
 *                  than zero, this must be a readable buffer of at least that
 *                  size in Bytes.
 * \param output    The buffer for holding the output data. If \p length is
 *                  greater than zero, this must be a writable buffer of at
 *                  least that size in Bytes.
 *
 * \return         \c 0 on success.
 * \return         #MBEDTLS_ERR_GCM_BAD_INPUT on failure.
 */
int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
                size_t length,
                const unsigned char *input,
                unsigned char *output );

/**
 * \brief           This function finishes the GCM operation and generates
 *                  the authentication tag.
 *
 *                  It wraps up the GCM stream, and generates the
 *                  tag. The tag can have a maximum length of 16 Bytes.
 *
 * \param ctx       The GCM context. This must be initialized.
 * \param tag       The buffer for holding the tag. This must be a writable
 *                  buffer of at least \p tag_len Bytes.
 * \param tag_len   The length of the tag to generate. This must be at least
 *                  four.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_GCM_BAD_INPUT on failure.
 */
int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
                unsigned char *tag,
                size_t tag_len );

/**
 * \brief           This function clears a GCM context and the underlying
 *                  cipher sub-context.
 *
 * \param ctx       The GCM context to clear. If this is \c NULL, the call has
 *                  no effect. Otherwise, this must be initialized.
 */
void mbedtls_gcm_free( mbedtls_gcm_context *ctx );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          The GCM checkup routine.
 *
 * \return         \c 0 on success.
 * \return         \c 1 on failure.
 */
int mbedtls_gcm_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif


#endif /* gcm.h */


/********* Start of file include/mbedtls/pem.h ************/

/**
 * \file pem.h
 *
 * \brief Privacy Enhanced Mail (PEM) decoding
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_PEM_H
#define MBEDTLS_PEM_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>

/**
 * \name PEM Error codes
 * These error codes are returned in case of errors reading the
 * PEM data.
 * \{
 */
/** No PEM header or footer found. */
#define MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT          -0x1080
/** PEM string is not as expected. */
#define MBEDTLS_ERR_PEM_INVALID_DATA                      -0x1100
/** Failed to allocate memory. */
#define MBEDTLS_ERR_PEM_ALLOC_FAILED                      -0x1180
/** RSA IV is not in hex-format. */
#define MBEDTLS_ERR_PEM_INVALID_ENC_IV                    -0x1200
/** Unsupported key encryption algorithm. */
#define MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG                   -0x1280
/** Private key password can't be empty. */
#define MBEDTLS_ERR_PEM_PASSWORD_REQUIRED                 -0x1300
/** Given private key password does not allow for correct decryption. */
#define MBEDTLS_ERR_PEM_PASSWORD_MISMATCH                 -0x1380
/** Unavailable feature, e.g. hashing/encryption combination. */
#define MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE               -0x1400
/** Bad input parameters to function. */
#define MBEDTLS_ERR_PEM_BAD_INPUT_DATA                    -0x1480
/* \} name */

#ifdef __cplusplus
extern "C" {
#endif

#if defined(MBEDTLS_PEM_PARSE_C)
/**
 * \brief       PEM context structure
 */
typedef struct mbedtls_pem_context
{
    unsigned char *buf;     /*!< buffer for decoded data             */
    size_t buflen;          /*!< length of the buffer                */
    unsigned char *info;    /*!< buffer for extra header information */
}
mbedtls_pem_context;

/**
 * \brief       PEM context setup
 *
 * \param ctx   context to be initialized
 */
void mbedtls_pem_init( mbedtls_pem_context *ctx );

/**
 * \brief       Read a buffer for PEM information and store the resulting
 *              data into the specified context buffers.
 *
 * \param ctx       context to use
 * \param header    header string to seek and expect
 * \param footer    footer string to seek and expect
 * \param data      source data to look in (must be nul-terminated)
 * \param pwd       password for decryption (can be NULL)
 * \param pwdlen    length of password
 * \param use_len   destination for total length used (set after header is
 *                  correctly read, so unless you get
 *                  MBEDTLS_ERR_PEM_BAD_INPUT_DATA or
 *                  MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT, use_len is
 *                  the length to skip)
 *
 * \note            Attempts to check password correctness by verifying if
 *                  the decrypted text starts with an ASN.1 sequence of
 *                  appropriate length
 *
 * \return          0 on success, or a specific PEM error code
 */
int mbedtls_pem_read_buffer( mbedtls_pem_context *ctx, const char *header, const char *footer,
                     const unsigned char *data,
                     const unsigned char *pwd,
                     size_t pwdlen, size_t *use_len );

/**
 * \brief       PEM context memory freeing
 *
 * \param ctx   context to be freed
 */
void mbedtls_pem_free( mbedtls_pem_context *ctx );
#endif /* MBEDTLS_PEM_PARSE_C */

#if defined(MBEDTLS_PEM_WRITE_C)
/**
 * \brief           Write a buffer of PEM information from a DER encoded
 *                  buffer.
 *
 * \param header    The header string to write.
 * \param footer    The footer string to write.
 * \param der_data  The DER data to encode.
 * \param der_len   The length of the DER data \p der_data in Bytes.
 * \param buf       The buffer to write to.
 * \param buf_len   The length of the output buffer \p buf in Bytes.
 * \param olen      The address at which to store the total length written
 *                  or required (if \p buf_len is not enough).
 *
 * \note            You may pass \c NULL for \p buf and \c 0 for \p buf_len
 *                  to request the length of the resulting PEM buffer in
 *                  `*olen`.
 *
 * \note            This function may be called with overlapping \p der_data
 *                  and \p buf buffers.
 *
 * \return          \c 0 on success.
 * \return          #MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL if \p buf isn't large
 *                  enough to hold the PEM buffer. In  this case, `*olen` holds
 *                  the required minimum size of \p buf.
 * \return          Another PEM or BASE64 error code on other kinds of failure.
 */
int mbedtls_pem_write_buffer( const char *header, const char *footer,
                      const unsigned char *der_data, size_t der_len,
                      unsigned char *buf, size_t buf_len, size_t *olen );
#endif /* MBEDTLS_PEM_WRITE_C */

#ifdef __cplusplus
}
#endif

#endif /* pem.h */


/********* Start of file include/mbedtls/asn1write.h ************/

/**
 * \file asn1write.h
 *
 * \brief ASN.1 buffer writing functionality
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_ASN1_WRITE_H
#define MBEDTLS_ASN1_WRITE_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#define MBEDTLS_ASN1_CHK_ADD(g, f)                      \
    do                                                  \
    {                                                   \
        if( ( ret = (f) ) < 0 )                         \
            return( ret );                              \
        else                                            \
            (g) += ret;                                 \
    } while( 0 )

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief           Write a length field in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param len       The length value to write.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_len( unsigned char **p, unsigned char *start,
                            size_t len );
/**
 * \brief           Write an ASN.1 tag in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param tag       The tag to write.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_tag( unsigned char **p, unsigned char *start,
                            unsigned char tag );

/**
 * \brief           Write raw buffer data.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param buf       The data buffer to write.
 * \param size      The length of the data buffer.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_raw_buffer( unsigned char **p, unsigned char *start,
                                   const unsigned char *buf, size_t size );

#if defined(MBEDTLS_BIGNUM_C)
/**
 * \brief           Write a arbitrary-precision number (#MBEDTLS_ASN1_INTEGER)
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param X         The MPI to write.
 *                  It must be non-negative.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_mpi( unsigned char **p, unsigned char *start,
                            const mbedtls_mpi *X );
#endif /* MBEDTLS_BIGNUM_C */

/**
 * \brief           Write a NULL tag (#MBEDTLS_ASN1_NULL) with zero data
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_null( unsigned char **p, unsigned char *start );

/**
 * \brief           Write an OID tag (#MBEDTLS_ASN1_OID) and data
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param oid       The OID to write.
 * \param oid_len   The length of the OID.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_oid( unsigned char **p, unsigned char *start,
                            const char *oid, size_t oid_len );

/**
 * \brief           Write an AlgorithmIdentifier sequence in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param oid       The OID of the algorithm to write.
 * \param oid_len   The length of the algorithm's OID.
 * \param par_len   The length of the parameters, which must be already written.
 *                  If 0, NULL parameters are added
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_algorithm_identifier( unsigned char **p,
                                             unsigned char *start,
                                             const char *oid, size_t oid_len,
                                             size_t par_len );

/**
 * \brief           Write a boolean tag (#MBEDTLS_ASN1_BOOLEAN) and value
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param boolean   The boolean value to write, either \c 0 or \c 1.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_bool( unsigned char **p, unsigned char *start,
                             int boolean );

/**
 * \brief           Write an int tag (#MBEDTLS_ASN1_INTEGER) and value
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param val       The integer value to write.
 *                  It must be non-negative.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_int( unsigned char **p, unsigned char *start, int val );

/**
 * \brief           Write an enum tag (#MBEDTLS_ASN1_ENUMERATED) and value
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param val       The integer value to write.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */
int mbedtls_asn1_write_enum( unsigned char **p, unsigned char *start, int val );

/**
 * \brief           Write a string in ASN.1 format using a specific
 *                  string encoding tag.

 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param tag       The string encoding tag to write, e.g.
 *                  #MBEDTLS_ASN1_UTF8_STRING.
 * \param text      The string to write.
 * \param text_len  The length of \p text in bytes (which might
 *                  be strictly larger than the number of characters).
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */
int mbedtls_asn1_write_tagged_string( unsigned char **p, unsigned char *start,
                                      int tag, const char *text,
                                      size_t text_len );

/**
 * \brief           Write a string in ASN.1 format using the PrintableString
 *                  string encoding tag (#MBEDTLS_ASN1_PRINTABLE_STRING).
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param text      The string to write.
 * \param text_len  The length of \p text in bytes (which might
 *                  be strictly larger than the number of characters).
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */
int mbedtls_asn1_write_printable_string( unsigned char **p,
                                         unsigned char *start,
                                         const char *text, size_t text_len );

/**
 * \brief           Write a UTF8 string in ASN.1 format using the UTF8String
 *                  string encoding tag (#MBEDTLS_ASN1_UTF8_STRING).
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param text      The string to write.
 * \param text_len  The length of \p text in bytes (which might
 *                  be strictly larger than the number of characters).
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */
int mbedtls_asn1_write_utf8_string( unsigned char **p, unsigned char *start,
                                    const char *text, size_t text_len );

/**
 * \brief           Write a string in ASN.1 format using the IA5String
 *                  string encoding tag (#MBEDTLS_ASN1_IA5_STRING).
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param text      The string to write.
 * \param text_len  The length of \p text in bytes (which might
 *                  be strictly larger than the number of characters).
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */
int mbedtls_asn1_write_ia5_string( unsigned char **p, unsigned char *start,
                                   const char *text, size_t text_len );

/**
 * \brief           Write a bitstring tag (#MBEDTLS_ASN1_BIT_STRING) and
 *                  value in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param buf       The bitstring to write.
 * \param bits      The total number of bits in the bitstring.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */
int mbedtls_asn1_write_bitstring( unsigned char **p, unsigned char *start,
                                  const unsigned char *buf, size_t bits );

/**
 * \brief           This function writes a named bitstring tag
 *                  (#MBEDTLS_ASN1_BIT_STRING) and value in ASN.1 format.
 *
 *                  As stated in RFC 5280 Appendix B, trailing zeroes are
 *                  omitted when encoding named bitstrings in DER.
 *
 * \note            This function works backwards within the data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer which is used for bounds-checking.
 * \param buf       The bitstring to write.
 * \param bits      The total number of bits in the bitstring.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */
int mbedtls_asn1_write_named_bitstring( unsigned char **p,
                                        unsigned char *start,
                                        const unsigned char *buf,
                                        size_t bits );

/**
 * \brief           Write an octet string tag (#MBEDTLS_ASN1_OCTET_STRING)
 *                  and value in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param buf       The buffer holding the data to write.
 * \param size      The length of the data buffer \p buf.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */
int mbedtls_asn1_write_octet_string( unsigned char **p, unsigned char *start,
                                     const unsigned char *buf, size_t size );

/**
 * \brief           Create or find a specific named_data entry for writing in a
 *                  sequence or list based on the OID. If not already in there,
 *                  a new entry is added to the head of the list.
 *                  Warning: Destructive behaviour for the val data!
 *
 * \param list      The pointer to the location of the head of the list to seek
 *                  through (will be updated in case of a new entry).
 * \param oid       The OID to look for.
 * \param oid_len   The size of the OID.
 * \param val       The associated data to store. If this is \c NULL,
 *                  no data is copied to the new or existing buffer.
 * \param val_len   The minimum length of the data buffer needed.
 *                  If this is 0, do not allocate a buffer for the associated
 *                  data.
 *                  If the OID was already present, enlarge, shrink or free
 *                  the existing buffer to fit \p val_len.
 *
 * \return          A pointer to the new / existing entry on success.
 * \return          \c NULL if if there was a memory allocation error.
 */
mbedtls_asn1_named_data *mbedtls_asn1_store_named_data( mbedtls_asn1_named_data **list,
                                        const char *oid, size_t oid_len,
                                        const unsigned char *val,
                                        size_t val_len );

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_ASN1_WRITE_H */


/********* Start of file include/mbedtls/hmac_drbg.h ************/

/**
 * \file hmac_drbg.h
 *
 * \brief The HMAC_DRBG pseudorandom generator.
 *
 * This module implements the HMAC_DRBG pseudorandom generator described
 * in <em>NIST SP 800-90A: Recommendation for Random Number Generation Using
 * Deterministic Random Bit Generators</em>.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_HMAC_DRBG_H
#define MBEDTLS_HMAC_DRBG_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



#if defined(MBEDTLS_THREADING_C)

#endif

/*
 * Error codes
 */
/** Too many random requested in single call. */
#define MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG              -0x0003
/** Input too large (Entropy + additional). */
#define MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG                -0x0005
/** Read/write error in file. */
#define MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR                -0x0007
/** The entropy source failed. */
#define MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED        -0x0009

/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */

#if !defined(MBEDTLS_HMAC_DRBG_RESEED_INTERVAL)
#define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL   10000   /**< Interval before reseed is performed by default */
#endif

#if !defined(MBEDTLS_HMAC_DRBG_MAX_INPUT)
#define MBEDTLS_HMAC_DRBG_MAX_INPUT         256     /**< Maximum number of additional input bytes */
#endif

#if !defined(MBEDTLS_HMAC_DRBG_MAX_REQUEST)
#define MBEDTLS_HMAC_DRBG_MAX_REQUEST       1024    /**< Maximum number of requested bytes per call */
#endif

#if !defined(MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT)
#define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT    384     /**< Maximum size of (re)seed buffer */
#endif

/* \} name SECTION: Module settings */

#define MBEDTLS_HMAC_DRBG_PR_OFF   0   /**< No prediction resistance       */
#define MBEDTLS_HMAC_DRBG_PR_ON    1   /**< Prediction resistance enabled  */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * HMAC_DRBG context.
 */
typedef struct mbedtls_hmac_drbg_context
{
    /* Working state: the key K is not stored explicitly,
     * but is implied by the HMAC context */
    mbedtls_md_context_t md_ctx;                    /*!< HMAC context (inc. K)  */
    unsigned char V[MBEDTLS_MD_MAX_SIZE];  /*!< V in the spec          */
    int reseed_counter;                     /*!< reseed counter         */

    /* Administrative state */
    size_t entropy_len;         /*!< entropy bytes grabbed on each (re)seed */
    int prediction_resistance;  /*!< enable prediction resistance (Automatic
                                     reseed before every random generation) */
    int reseed_interval;        /*!< reseed interval   */

    /* Callbacks */
    int (*f_entropy)(void *, unsigned char *, size_t); /*!< entropy function */
    void *p_entropy;            /*!< context for the entropy function        */

#if defined(MBEDTLS_THREADING_C)
    /* Invariant: the mutex is initialized if and only if
     * md_ctx->md_info != NULL. This means that the mutex is initialized
     * during the initial seeding in mbedtls_hmac_drbg_seed() or
     * mbedtls_hmac_drbg_seed_buf() and freed in mbedtls_ctr_drbg_free().
     *
     * Note that this invariant may change without notice. Do not rely on it
     * and do not access the mutex directly in application code.
     */
    mbedtls_threading_mutex_t mutex;
#endif
} mbedtls_hmac_drbg_context;

/**
 * \brief               HMAC_DRBG context initialization.
 *
 * This function makes the context ready for mbedtls_hmac_drbg_seed(),
 * mbedtls_hmac_drbg_seed_buf() or mbedtls_hmac_drbg_free().
 *
 * \note                The reseed interval is #MBEDTLS_HMAC_DRBG_RESEED_INTERVAL
 *                      by default. Override this value by calling
 *                      mbedtls_hmac_drbg_set_reseed_interval().
 *
 * \param ctx           HMAC_DRBG context to be initialized.
 */
void mbedtls_hmac_drbg_init( mbedtls_hmac_drbg_context *ctx );

/**
 * \brief               HMAC_DRBG initial seeding.
 *
 * Set the initial seed and set up the entropy source for future reseeds.
 *
 * A typical choice for the \p f_entropy and \p p_entropy parameters is
 * to use the entropy module:
 * - \p f_entropy is mbedtls_entropy_func();
 * - \p p_entropy is an instance of ::mbedtls_entropy_context initialized
 *   with mbedtls_entropy_init() (which registers the platform's default
 *   entropy sources).
 *
 * You can provide a personalization string in addition to the
 * entropy source, to make this instantiation as unique as possible.
 *
 * \note                By default, the security strength as defined by NIST is:
 *                      - 128 bits if \p md_info is SHA-1;
 *                      - 192 bits if \p md_info is SHA-224;
 *                      - 256 bits if \p md_info is SHA-256, SHA-384 or SHA-512.
 *                      Note that SHA-256 is just as efficient as SHA-224.
 *                      The security strength can be reduced if a smaller
 *                      entropy length is set with
 *                      mbedtls_hmac_drbg_set_entropy_len().
 *
 * \note                The default entropy length is the security strength
 *                      (converted from bits to bytes). You can override
 *                      it by calling mbedtls_hmac_drbg_set_entropy_len().
 *
 * \note                During the initial seeding, this function calls
 *                      the entropy source to obtain a nonce
 *                      whose length is half the entropy length.
 */
#if defined(MBEDTLS_THREADING_C)
/**
 * \note                When Mbed TLS is built with threading support,
 *                      after this function returns successfully,
 *                      it is safe to call mbedtls_hmac_drbg_random()
 *                      from multiple threads. Other operations, including
 *                      reseeding, are not thread-safe.
 */
#endif /* MBEDTLS_THREADING_C */
/**
 * \param ctx           HMAC_DRBG context to be seeded.
 * \param md_info       MD algorithm to use for HMAC_DRBG.
 * \param f_entropy     The entropy callback, taking as arguments the
 *                      \p p_entropy context, the buffer to fill, and the
 *                      length of the buffer.
 *                      \p f_entropy is always called with a length that is
 *                      less than or equal to the entropy length.
 * \param p_entropy     The entropy context to pass to \p f_entropy.
 * \param custom        The personalization string.
 *                      This can be \c NULL, in which case the personalization
 *                      string is empty regardless of the value of \p len.
 * \param len           The length of the personalization string.
 *                      This must be at most #MBEDTLS_HMAC_DRBG_MAX_INPUT
 *                      and also at most
 *                      #MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT - \p entropy_len * 3 / 2
 *                      where \p entropy_len is the entropy length
 *                      described above.
 *
 * \return              \c 0 if successful.
 * \return              #MBEDTLS_ERR_MD_BAD_INPUT_DATA if \p md_info is
 *                      invalid.
 * \return              #MBEDTLS_ERR_MD_ALLOC_FAILED if there was not enough
 *                      memory to allocate context data.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED
 *                      if the call to \p f_entropy failed.
 */
int mbedtls_hmac_drbg_seed( mbedtls_hmac_drbg_context *ctx,
                    const mbedtls_md_info_t * md_info,
                    int (*f_entropy)(void *, unsigned char *, size_t),
                    void *p_entropy,
                    const unsigned char *custom,
                    size_t len );

/**
 * \brief               Initilisation of simpified HMAC_DRBG (never reseeds).
 *
 * This function is meant for use in algorithms that need a pseudorandom
 * input such as deterministic ECDSA.
 */
#if defined(MBEDTLS_THREADING_C)
/**
 * \note                When Mbed TLS is built with threading support,
 *                      after this function returns successfully,
 *                      it is safe to call mbedtls_hmac_drbg_random()
 *                      from multiple threads. Other operations, including
 *                      reseeding, are not thread-safe.
 */
#endif /* MBEDTLS_THREADING_C */
/**
 * \param ctx           HMAC_DRBG context to be initialised.
 * \param md_info       MD algorithm to use for HMAC_DRBG.
 * \param data          Concatenation of the initial entropy string and
 *                      the additional data.
 * \param data_len      Length of \p data in bytes.
 *
 * \return              \c 0 if successful. or
 * \return              #MBEDTLS_ERR_MD_BAD_INPUT_DATA if \p md_info is
 *                      invalid.
 * \return              #MBEDTLS_ERR_MD_ALLOC_FAILED if there was not enough
 *                      memory to allocate context data.
 */
int mbedtls_hmac_drbg_seed_buf( mbedtls_hmac_drbg_context *ctx,
                        const mbedtls_md_info_t * md_info,
                        const unsigned char *data, size_t data_len );

/**
 * \brief               This function turns prediction resistance on or off.
 *                      The default value is off.
 *
 * \note                If enabled, entropy is gathered at the beginning of
 *                      every call to mbedtls_hmac_drbg_random_with_add()
 *                      or mbedtls_hmac_drbg_random().
 *                      Only use this if your entropy source has sufficient
 *                      throughput.
 *
 * \param ctx           The HMAC_DRBG context.
 * \param resistance    #MBEDTLS_HMAC_DRBG_PR_ON or #MBEDTLS_HMAC_DRBG_PR_OFF.
 */
void mbedtls_hmac_drbg_set_prediction_resistance( mbedtls_hmac_drbg_context *ctx,
                                          int resistance );

/**
 * \brief               This function sets the amount of entropy grabbed on each
 *                      seed or reseed.
 *
 * See the documentation of mbedtls_hmac_drbg_seed() for the default value.
 *
 * \param ctx           The HMAC_DRBG context.
 * \param len           The amount of entropy to grab, in bytes.
 */
void mbedtls_hmac_drbg_set_entropy_len( mbedtls_hmac_drbg_context *ctx,
                                size_t len );

/**
 * \brief               Set the reseed interval.
 *
 * The reseed interval is the number of calls to mbedtls_hmac_drbg_random()
 * or mbedtls_hmac_drbg_random_with_add() after which the entropy function
 * is called again.
 *
 * The default value is #MBEDTLS_HMAC_DRBG_RESEED_INTERVAL.
 *
 * \param ctx           The HMAC_DRBG context.
 * \param interval      The reseed interval.
 */
void mbedtls_hmac_drbg_set_reseed_interval( mbedtls_hmac_drbg_context *ctx,
                                    int interval );

/**
 * \brief               This function updates the state of the HMAC_DRBG context.
 *
 * \note                This function is not thread-safe. It is not safe
 *                      to call this function if another thread might be
 *                      concurrently obtaining random numbers from the same
 *                      context or updating or reseeding the same context.
 *
 * \param ctx           The HMAC_DRBG context.
 * \param additional    The data to update the state with.
 *                      If this is \c NULL, there is no additional data.
 * \param add_len       Length of \p additional in bytes.
 *                      Unused if \p additional is \c NULL.
 *
 * \return              \c 0 on success, or an error from the underlying
 *                      hash calculation.
 */
int mbedtls_hmac_drbg_update_ret( mbedtls_hmac_drbg_context *ctx,
                       const unsigned char *additional, size_t add_len );

/**
 * \brief               This function reseeds the HMAC_DRBG context, that is
 *                      extracts data from the entropy source.
 *
 * \note                This function is not thread-safe. It is not safe
 *                      to call this function if another thread might be
 *                      concurrently obtaining random numbers from the same
 *                      context or updating or reseeding the same context.
 *
 * \param ctx           The HMAC_DRBG context.
 * \param additional    Additional data to add to the state.
 *                      If this is \c NULL, there is no additional data
 *                      and \p len should be \c 0.
 * \param len           The length of the additional data.
 *                      This must be at most #MBEDTLS_HMAC_DRBG_MAX_INPUT
 *                      and also at most
 *                      #MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT - \p entropy_len
 *                      where \p entropy_len is the entropy length
 *                      (see mbedtls_hmac_drbg_set_entropy_len()).
 *
 * \return              \c 0 if successful.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED
 *                      if a call to the entropy function failed.
 */
int mbedtls_hmac_drbg_reseed( mbedtls_hmac_drbg_context *ctx,
                      const unsigned char *additional, size_t len );

/**
 * \brief   This function updates an HMAC_DRBG instance with additional
 *          data and uses it to generate random data.
 *
 * This function automatically reseeds if the reseed counter is exceeded
 * or prediction resistance is enabled.
 *
 * \note                This function is not thread-safe. It is not safe
 *                      to call this function if another thread might be
 *                      concurrently obtaining random numbers from the same
 *                      context or updating or reseeding the same context.
 *
 * \param p_rng         The HMAC_DRBG context. This must be a pointer to a
 *                      #mbedtls_hmac_drbg_context structure.
 * \param output        The buffer to fill.
 * \param output_len    The length of the buffer in bytes.
 *                      This must be at most #MBEDTLS_HMAC_DRBG_MAX_REQUEST.
 * \param additional    Additional data to update with.
 *                      If this is \c NULL, there is no additional data
 *                      and \p add_len should be \c 0.
 * \param add_len       The length of the additional data.
 *                      This must be at most #MBEDTLS_HMAC_DRBG_MAX_INPUT.
 *
 * \return              \c 0 if successful.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED
 *                      if a call to the entropy source failed.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG if
 *                      \p output_len > #MBEDTLS_HMAC_DRBG_MAX_REQUEST.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG if
 *                      \p add_len > #MBEDTLS_HMAC_DRBG_MAX_INPUT.
 */
int mbedtls_hmac_drbg_random_with_add( void *p_rng,
                               unsigned char *output, size_t output_len,
                               const unsigned char *additional,
                               size_t add_len );

/**
 * \brief   This function uses HMAC_DRBG to generate random data.
 *
 * This function automatically reseeds if the reseed counter is exceeded
 * or prediction resistance is enabled.
 */
#if defined(MBEDTLS_THREADING_C)
/**
 * \note                When Mbed TLS is built with threading support,
 *                      it is safe to call mbedtls_ctr_drbg_random()
 *                      from multiple threads. Other operations, including
 *                      reseeding, are not thread-safe.
 */
#endif /* MBEDTLS_THREADING_C */
/**
 * \param p_rng         The HMAC_DRBG context. This must be a pointer to a
 *                      #mbedtls_hmac_drbg_context structure.
 * \param output        The buffer to fill.
 * \param out_len       The length of the buffer in bytes.
 *                      This must be at most #MBEDTLS_HMAC_DRBG_MAX_REQUEST.
 *
 * \return              \c 0 if successful.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED
 *                      if a call to the entropy source failed.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG if
 *                      \p out_len > #MBEDTLS_HMAC_DRBG_MAX_REQUEST.
 */
int mbedtls_hmac_drbg_random( void *p_rng, unsigned char *output, size_t out_len );

/**
 * \brief               This function resets HMAC_DRBG context to the state immediately
 *                      after initial call of mbedtls_hmac_drbg_init().
 *
 * \param ctx           The HMAC_DRBG context to free.
 */
void mbedtls_hmac_drbg_free( mbedtls_hmac_drbg_context *ctx );

#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief               This function updates the state of the HMAC_DRBG context.
 *
 * \deprecated          Superseded by mbedtls_hmac_drbg_update_ret()
 *                      in 2.16.0.
 *
 * \param ctx           The HMAC_DRBG context.
 * \param additional    The data to update the state with.
 *                      If this is \c NULL, there is no additional data.
 * \param add_len       Length of \p additional in bytes.
 *                      Unused if \p additional is \c NULL.
 */
MBEDTLS_DEPRECATED void mbedtls_hmac_drbg_update(
    mbedtls_hmac_drbg_context *ctx,
    const unsigned char *additional, size_t add_len );
#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_FS_IO)
/**
 * \brief               This function writes a seed file.
 *
 * \param ctx           The HMAC_DRBG context.
 * \param path          The name of the file.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR on file error.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED on reseed
 *                      failure.
 */
int mbedtls_hmac_drbg_write_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path );

/**
 * \brief               This function reads and updates a seed file. The seed
 *                      is added to this instance.
 *
 * \param ctx           The HMAC_DRBG context.
 * \param path          The name of the file.
 *
 * \return              \c 0 on success.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR on file error.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED on
 *                      reseed failure.
 * \return              #MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG if the existing
 *                      seed file is too large.
 */
int mbedtls_hmac_drbg_update_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path );
#endif /* MBEDTLS_FS_IO */


#if defined(MBEDTLS_SELF_TEST)
/**
 * \brief               The HMAC_DRBG Checkup routine.
 *
 * \return              \c 0 if successful.
 * \return              \c 1 if the test failed.
 */
int mbedtls_hmac_drbg_self_test( int verbose );
#endif

#ifdef __cplusplus
}
#endif

#endif /* hmac_drbg.h */


/********* Start of file include/mbedtls/pkcs12.h ************/

/**
 * \file pkcs12.h
 *
 * \brief PKCS#12 Personal Information Exchange Syntax
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_PKCS12_H
#define MBEDTLS_PKCS12_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif





#include <stddef.h>

/** Bad input parameters to function. */
#define MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA                 -0x1F80
/** Feature not available, e.g. unsupported encryption scheme. */
#define MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE            -0x1F00
/** PBE ASN.1 data not as expected. */
#define MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT             -0x1E80
/** Given private key password does not allow for correct decryption. */
#define MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH              -0x1E00

#define MBEDTLS_PKCS12_DERIVE_KEY       1   /**< encryption/decryption key */
#define MBEDTLS_PKCS12_DERIVE_IV        2   /**< initialization vector     */
#define MBEDTLS_PKCS12_DERIVE_MAC_KEY   3   /**< integrity / MAC key       */

#define MBEDTLS_PKCS12_PBE_DECRYPT      0
#define MBEDTLS_PKCS12_PBE_ENCRYPT      1

#ifdef __cplusplus
extern "C" {
#endif

#if defined(MBEDTLS_ASN1_PARSE_C)

/**
 * \brief            PKCS12 Password Based function (encryption / decryption)
 *                   for pbeWithSHAAnd128BitRC4
 *
 * \param pbe_params an ASN1 buffer containing the pkcs-12PbeParams structure
 * \param mode       either MBEDTLS_PKCS12_PBE_ENCRYPT or MBEDTLS_PKCS12_PBE_DECRYPT
 * \param pwd        the password used (may be NULL if no password is used)
 * \param pwdlen     length of the password (may be 0)
 * \param input      the input data
 * \param len        data length
 * \param output     the output buffer
 *
 * \return           0 if successful, or a MBEDTLS_ERR_XXX code
 */
int mbedtls_pkcs12_pbe_sha1_rc4_128( mbedtls_asn1_buf *pbe_params, int mode,
                             const unsigned char *pwd,  size_t pwdlen,
                             const unsigned char *input, size_t len,
                             unsigned char *output );

/**
 * \brief            PKCS12 Password Based function (encryption / decryption)
 *                   for cipher-based and mbedtls_md-based PBE's
 *
 * \param pbe_params an ASN1 buffer containing the pkcs-12 PbeParams structure
 * \param mode       either #MBEDTLS_PKCS12_PBE_ENCRYPT or
 *                   #MBEDTLS_PKCS12_PBE_DECRYPT
 * \param cipher_type the cipher used
 * \param md_type    the mbedtls_md used
 * \param pwd        Latin1-encoded password used. This may only be \c NULL when
 *                   \p pwdlen is 0. No null terminator should be used.
 * \param pwdlen     length of the password (may be 0)
 * \param input      the input data
 * \param len        data length
 * \param output     the output buffer
 *
 * \return           0 if successful, or a MBEDTLS_ERR_XXX code
 */
int mbedtls_pkcs12_pbe( mbedtls_asn1_buf *pbe_params, int mode,
                mbedtls_cipher_type_t cipher_type, mbedtls_md_type_t md_type,
                const unsigned char *pwd,  size_t pwdlen,
                const unsigned char *input, size_t len,
                unsigned char *output );

#endif /* MBEDTLS_ASN1_PARSE_C */

/**
 * \brief            The PKCS#12 derivation function uses a password and a salt
 *                   to produce pseudo-random bits for a particular "purpose".
 *
 *                   Depending on the given id, this function can produce an
 *                   encryption/decryption key, an initialization vector or an
 *                   integrity key.
 *
 * \param data       buffer to store the derived data in
 * \param datalen    length of buffer to fill
 * \param pwd        The password to use. For compliance with PKCS#12 §B.1, this
 *                   should be a BMPString, i.e. a Unicode string where each
 *                   character is encoded as 2 bytes in big-endian order, with
 *                   no byte order mark and with a null terminator (i.e. the
 *                   last two bytes should be 0x00 0x00).
 * \param pwdlen     length of the password (may be 0).
 * \param salt       Salt buffer to use This may only be \c NULL when
 *                   \p saltlen is 0.
 * \param saltlen    length of the salt (may be zero)
 * \param mbedtls_md mbedtls_md type to use during the derivation
 * \param id         id that describes the purpose (can be
 *                   #MBEDTLS_PKCS12_DERIVE_KEY, #MBEDTLS_PKCS12_DERIVE_IV or
 *                   #MBEDTLS_PKCS12_DERIVE_MAC_KEY)
 * \param iterations number of iterations
 *
 * \return          0 if successful, or a MD, BIGNUM type error.
 */
int mbedtls_pkcs12_derivation( unsigned char *data, size_t datalen,
                       const unsigned char *pwd, size_t pwdlen,
                       const unsigned char *salt, size_t saltlen,
                       mbedtls_md_type_t mbedtls_md, int id, int iterations );

#ifdef __cplusplus
}
#endif

#endif /* pkcs12.h */


/********* Start of file include/mbedtls/pkcs11.h ************/

/**
 * \file pkcs11.h
 *
 * \brief Wrapper for PKCS#11 library libpkcs11-helper
 *
 * \author Adriaan de Jong <dejong@fox-it.com>
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_PKCS11_H
#define MBEDTLS_PKCS11_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#if defined(MBEDTLS_PKCS11_C)



#include <pkcs11-helper-1.0/pkcs11h-certificate.h>

#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
    !defined(inline) && !defined(__cplusplus)
#define inline __inline
#endif

#ifdef __cplusplus
extern "C" {
#endif

#if defined(MBEDTLS_DEPRECATED_REMOVED)

/**
 * Context for PKCS #11 private keys.
 */
typedef struct mbedtls_pkcs11_context
{
        pkcs11h_certificate_t pkcs11h_cert;
        int len;
} mbedtls_pkcs11_context;

#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif

/**
 * Initialize a mbedtls_pkcs11_context.
 * (Just making memory references valid.)
 *
 * \deprecated          This function is deprecated and will be removed in a
 *                      future version of the library.
 */
MBEDTLS_DEPRECATED void mbedtls_pkcs11_init( mbedtls_pkcs11_context *ctx );

/**
 * Fill in a mbed TLS certificate, based on the given PKCS11 helper certificate.
 *
 * \deprecated          This function is deprecated and will be removed in a
 *                      future version of the library.
 *
 * \param cert          X.509 certificate to fill
 * \param pkcs11h_cert  PKCS #11 helper certificate
 *
 * \return              0 on success.
 */
MBEDTLS_DEPRECATED int mbedtls_pkcs11_x509_cert_bind( mbedtls_x509_crt *cert,
                                        pkcs11h_certificate_t pkcs11h_cert );

/**
 * Set up a mbedtls_pkcs11_context storing the given certificate. Note that the
 * mbedtls_pkcs11_context will take over control of the certificate, freeing it when
 * done.
 *
 * \deprecated          This function is deprecated and will be removed in a
 *                      future version of the library.
 *
 * \param priv_key      Private key structure to fill.
 * \param pkcs11_cert   PKCS #11 helper certificate
 *
 * \return              0 on success
 */
MBEDTLS_DEPRECATED int mbedtls_pkcs11_priv_key_bind(
                                        mbedtls_pkcs11_context *priv_key,
                                        pkcs11h_certificate_t pkcs11_cert );

/**
 * Free the contents of the given private key context. Note that the structure
 * itself is not freed.
 *
 * \deprecated          This function is deprecated and will be removed in a
 *                      future version of the library.
 *
 * \param priv_key      Private key structure to cleanup
 */
MBEDTLS_DEPRECATED void mbedtls_pkcs11_priv_key_free(
                                            mbedtls_pkcs11_context *priv_key );

/**
 * \brief          Do an RSA private key decrypt, then remove the message
 *                 padding
 *
 * \deprecated     This function is deprecated and will be removed in a future
 *                 version of the library.
 *
 * \param ctx      PKCS #11 context
 * \param mode     must be MBEDTLS_RSA_PRIVATE, for compatibility with rsa.c's signature
 * \param input    buffer holding the encrypted data
 * \param output   buffer that will hold the plaintext
 * \param olen     will contain the plaintext length
 * \param output_max_len    maximum length of the output buffer
 *
 * \return         0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
 *
 * \note           The output buffer must be as large as the size
 *                 of ctx->N (eg. 128 bytes if RSA-1024 is used) otherwise
 *                 an error is thrown.
 */
MBEDTLS_DEPRECATED int mbedtls_pkcs11_decrypt( mbedtls_pkcs11_context *ctx,
                                               int mode, size_t *olen,
                                               const unsigned char *input,
                                               unsigned char *output,
                                               size_t output_max_len );

/**
 * \brief          Do a private RSA to sign a message digest
 *
 * \deprecated     This function is deprecated and will be removed in a future
 *                 version of the library.
 *
 * \param ctx      PKCS #11 context
 * \param mode     must be MBEDTLS_RSA_PRIVATE, for compatibility with rsa.c's signature
 * \param md_alg   a MBEDTLS_MD_XXX (use MBEDTLS_MD_NONE for signing raw data)
 * \param hashlen  message digest length (for MBEDTLS_MD_NONE only)
 * \param hash     buffer holding the message digest
 * \param sig      buffer that will hold the ciphertext
 *
 * \return         0 if the signing operation was successful,
 *                 or an MBEDTLS_ERR_RSA_XXX error code
 *
 * \note           The "sig" buffer must be as large as the size
 *                 of ctx->N (eg. 128 bytes if RSA-1024 is used).
 */
MBEDTLS_DEPRECATED int mbedtls_pkcs11_sign( mbedtls_pkcs11_context *ctx,
                                            int mode,
                                            mbedtls_md_type_t md_alg,
                                            unsigned int hashlen,
                                            const unsigned char *hash,
                                            unsigned char *sig );

/**
 * SSL/TLS wrappers for PKCS#11 functions
 *
 * \deprecated     This function is deprecated and will be removed in a future
 *                 version of the library.
 */
MBEDTLS_DEPRECATED static inline int mbedtls_ssl_pkcs11_decrypt( void *ctx,
                            int mode, size_t *olen,
                            const unsigned char *input, unsigned char *output,
                            size_t output_max_len )
{
    return mbedtls_pkcs11_decrypt( (mbedtls_pkcs11_context *) ctx, mode, olen, input, output,
                           output_max_len );
}

/**
 * \brief          This function signs a message digest using RSA.
 *
 * \deprecated     This function is deprecated and will be removed in a future
 *                 version of the library.
 *
 * \param ctx      The PKCS #11 context.
 * \param f_rng    The RNG function. This parameter is unused.
 * \param p_rng    The RNG context. This parameter is unused.
 * \param mode     The operation to run. This must be set to
 *                 MBEDTLS_RSA_PRIVATE, for compatibility with rsa.c's
 *                 signature.
 * \param md_alg   The message digest algorithm. One of the MBEDTLS_MD_XXX
 *                 must be passed to this function and MBEDTLS_MD_NONE can be
 *                 used for signing raw data.
 * \param hashlen  The message digest length (for MBEDTLS_MD_NONE only).
 * \param hash     The buffer holding the message digest.
 * \param sig      The buffer that will hold the ciphertext.
 *
 * \return         \c 0 if the signing operation was successful.
 * \return         A non-zero error code on failure.
 *
 * \note           The \p sig buffer must be as large as the size of
 *                 <code>ctx->N</code>. For example, 128 bytes if RSA-1024 is
 *                 used.
 */
MBEDTLS_DEPRECATED static inline int mbedtls_ssl_pkcs11_sign( void *ctx,
                    int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
                    int mode, mbedtls_md_type_t md_alg, unsigned int hashlen,
                    const unsigned char *hash, unsigned char *sig )
{
    ((void) f_rng);
    ((void) p_rng);
    return mbedtls_pkcs11_sign( (mbedtls_pkcs11_context *) ctx, mode, md_alg,
                        hashlen, hash, sig );
}

/**
 * This function gets the length of the private key.
 *
 * \deprecated     This function is deprecated and will be removed in a future
 *                 version of the library.
 *
 * \param ctx      The PKCS #11 context.
 *
 * \return         The length of the private key.
 */
MBEDTLS_DEPRECATED static inline size_t mbedtls_ssl_pkcs11_key_len( void *ctx )
{
    return ( (mbedtls_pkcs11_context *) ctx )->len;
}

#undef MBEDTLS_DEPRECATED

#endif /* MBEDTLS_DEPRECATED_REMOVED */

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_PKCS11_C */

#endif /* MBEDTLS_PKCS11_H */


/********* Start of file include/mbedtls/pkcs5.h ************/

/**
 * \file pkcs5.h
 *
 * \brief PKCS#5 functions
 *
 * \author Mathias Olsson <mathias@kompetensum.com>
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_PKCS5_H
#define MBEDTLS_PKCS5_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif




#include <stddef.h>
#include <stdint.h>

/** Bad input parameters to function. */
#define MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA                  -0x2f80
/** Unexpected ASN.1 data. */
#define MBEDTLS_ERR_PKCS5_INVALID_FORMAT                  -0x2f00
/** Requested encryption or digest alg not available. */
#define MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE             -0x2e80
/** Given private key password does not allow for correct decryption. */
#define MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH               -0x2e00

#define MBEDTLS_PKCS5_DECRYPT      0
#define MBEDTLS_PKCS5_ENCRYPT      1

#ifdef __cplusplus
extern "C" {
#endif

#if defined(MBEDTLS_ASN1_PARSE_C)

/**
 * \brief          PKCS#5 PBES2 function
 *
 * \param pbe_params the ASN.1 algorithm parameters
 * \param mode       either MBEDTLS_PKCS5_DECRYPT or MBEDTLS_PKCS5_ENCRYPT
 * \param pwd        password to use when generating key
 * \param pwdlen     length of password
 * \param data       data to process
 * \param datalen    length of data
 * \param output     output buffer
 *
 * \returns        0 on success, or a MBEDTLS_ERR_XXX code if verification fails.
 */
int mbedtls_pkcs5_pbes2( const mbedtls_asn1_buf *pbe_params, int mode,
                 const unsigned char *pwd,  size_t pwdlen,
                 const unsigned char *data, size_t datalen,
                 unsigned char *output );

#endif /* MBEDTLS_ASN1_PARSE_C */

/**
 * \brief          PKCS#5 PBKDF2 using HMAC
 *
 * \param ctx      Generic HMAC context
 * \param password Password to use when generating key
 * \param plen     Length of password
 * \param salt     Salt to use when generating key
 * \param slen     Length of salt
 * \param iteration_count       Iteration count
 * \param key_length            Length of generated key in bytes
 * \param output   Generated key. Must be at least as big as key_length
 *
 * \returns        0 on success, or a MBEDTLS_ERR_XXX code if verification fails.
 */
int mbedtls_pkcs5_pbkdf2_hmac( mbedtls_md_context_t *ctx, const unsigned char *password,
                       size_t plen, const unsigned char *salt, size_t slen,
                       unsigned int iteration_count,
                       uint32_t key_length, unsigned char *output );

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int mbedtls_pkcs5_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* pkcs5.h */


/********* Start of file include/mbedtls/oid.h ************/

/**
 * \file oid.h
 *
 * \brief Object Identifier (OID) database
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_OID_H
#define MBEDTLS_OID_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif




#include <stddef.h>

#if defined(MBEDTLS_CIPHER_C)

#endif

#if defined(MBEDTLS_MD_C)

#endif

/** OID is not found. */
#define MBEDTLS_ERR_OID_NOT_FOUND                         -0x002E
/** output buffer is too small */
#define MBEDTLS_ERR_OID_BUF_TOO_SMALL                     -0x000B

/* This is for the benefit of X.509, but defined here in order to avoid
 * having a "backwards" include of x.509.h here */
/*
 * X.509 extension types (internal, arbitrary values for bitsets)
 */
#define MBEDTLS_OID_X509_EXT_AUTHORITY_KEY_IDENTIFIER    (1 << 0)
#define MBEDTLS_OID_X509_EXT_SUBJECT_KEY_IDENTIFIER      (1 << 1)
#define MBEDTLS_OID_X509_EXT_KEY_USAGE                   (1 << 2)
#define MBEDTLS_OID_X509_EXT_CERTIFICATE_POLICIES        (1 << 3)
#define MBEDTLS_OID_X509_EXT_POLICY_MAPPINGS             (1 << 4)
#define MBEDTLS_OID_X509_EXT_SUBJECT_ALT_NAME            (1 << 5)
#define MBEDTLS_OID_X509_EXT_ISSUER_ALT_NAME             (1 << 6)
#define MBEDTLS_OID_X509_EXT_SUBJECT_DIRECTORY_ATTRS     (1 << 7)
#define MBEDTLS_OID_X509_EXT_BASIC_CONSTRAINTS           (1 << 8)
#define MBEDTLS_OID_X509_EXT_NAME_CONSTRAINTS            (1 << 9)
#define MBEDTLS_OID_X509_EXT_POLICY_CONSTRAINTS          (1 << 10)
#define MBEDTLS_OID_X509_EXT_EXTENDED_KEY_USAGE          (1 << 11)
#define MBEDTLS_OID_X509_EXT_CRL_DISTRIBUTION_POINTS     (1 << 12)
#define MBEDTLS_OID_X509_EXT_INIHIBIT_ANYPOLICY          (1 << 13)
#define MBEDTLS_OID_X509_EXT_FRESHEST_CRL                (1 << 14)
#define MBEDTLS_OID_X509_EXT_NS_CERT_TYPE                (1 << 16)

/*
 * Top level OID tuples
 */
#define MBEDTLS_OID_ISO_MEMBER_BODIES           "\x2a"          /* {iso(1) member-body(2)} */
#define MBEDTLS_OID_ISO_IDENTIFIED_ORG          "\x2b"          /* {iso(1) identified-organization(3)} */
#define MBEDTLS_OID_ISO_CCITT_DS                "\x55"          /* {joint-iso-ccitt(2) ds(5)} */
#define MBEDTLS_OID_ISO_ITU_COUNTRY             "\x60"          /* {joint-iso-itu-t(2) country(16)} */

/*
 * ISO Member bodies OID parts
 */
#define MBEDTLS_OID_COUNTRY_US                  "\x86\x48"      /* {us(840)} */
#define MBEDTLS_OID_ORG_RSA_DATA_SECURITY       "\x86\xf7\x0d"  /* {rsadsi(113549)} */
#define MBEDTLS_OID_RSA_COMPANY                 MBEDTLS_OID_ISO_MEMBER_BODIES MBEDTLS_OID_COUNTRY_US \
                                        MBEDTLS_OID_ORG_RSA_DATA_SECURITY /* {iso(1) member-body(2) us(840) rsadsi(113549)} */
#define MBEDTLS_OID_ORG_ANSI_X9_62              "\xce\x3d" /* ansi-X9-62(10045) */
#define MBEDTLS_OID_ANSI_X9_62                  MBEDTLS_OID_ISO_MEMBER_BODIES MBEDTLS_OID_COUNTRY_US \
                                        MBEDTLS_OID_ORG_ANSI_X9_62

/*
 * ISO Identified organization OID parts
 */
#define MBEDTLS_OID_ORG_DOD                     "\x06"          /* {dod(6)} */
#define MBEDTLS_OID_ORG_OIW                     "\x0e"
#define MBEDTLS_OID_OIW_SECSIG                  MBEDTLS_OID_ORG_OIW "\x03"
#define MBEDTLS_OID_OIW_SECSIG_ALG              MBEDTLS_OID_OIW_SECSIG "\x02"
#define MBEDTLS_OID_OIW_SECSIG_SHA1             MBEDTLS_OID_OIW_SECSIG_ALG "\x1a"
#define MBEDTLS_OID_ORG_CERTICOM                "\x81\x04"  /* certicom(132) */
#define MBEDTLS_OID_CERTICOM                    MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_ORG_CERTICOM
#define MBEDTLS_OID_ORG_TELETRUST               "\x24" /* teletrust(36) */
#define MBEDTLS_OID_TELETRUST                   MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_ORG_TELETRUST

/*
 * ISO ITU OID parts
 */
#define MBEDTLS_OID_ORGANIZATION                "\x01"          /* {organization(1)} */
#define MBEDTLS_OID_ISO_ITU_US_ORG              MBEDTLS_OID_ISO_ITU_COUNTRY MBEDTLS_OID_COUNTRY_US MBEDTLS_OID_ORGANIZATION /* {joint-iso-itu-t(2) country(16) us(840) organization(1)} */

#define MBEDTLS_OID_ORG_GOV                     "\x65"          /* {gov(101)} */
#define MBEDTLS_OID_GOV                         MBEDTLS_OID_ISO_ITU_US_ORG MBEDTLS_OID_ORG_GOV /* {joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101)} */

#define MBEDTLS_OID_ORG_NETSCAPE                "\x86\xF8\x42"  /* {netscape(113730)} */
#define MBEDTLS_OID_NETSCAPE                    MBEDTLS_OID_ISO_ITU_US_ORG MBEDTLS_OID_ORG_NETSCAPE /* Netscape OID {joint-iso-itu-t(2) country(16) us(840) organization(1) netscape(113730)} */

/* ISO arc for standard certificate and CRL extensions */
#define MBEDTLS_OID_ID_CE                       MBEDTLS_OID_ISO_CCITT_DS "\x1D" /**< id-ce OBJECT IDENTIFIER  ::=  {joint-iso-ccitt(2) ds(5) 29} */

#define MBEDTLS_OID_NIST_ALG                    MBEDTLS_OID_GOV "\x03\x04" /** { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistAlgorithm(4) */

/**
 * Private Internet Extensions
 * { iso(1) identified-organization(3) dod(6) internet(1)
 *                      security(5) mechanisms(5) pkix(7) }
 */
#define MBEDTLS_OID_INTERNET                    MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_ORG_DOD "\x01"
#define MBEDTLS_OID_PKIX                        MBEDTLS_OID_INTERNET "\x05\x05\x07"

/*
 * Arc for standard naming attributes
 */
#define MBEDTLS_OID_AT                          MBEDTLS_OID_ISO_CCITT_DS "\x04" /**< id-at OBJECT IDENTIFIER ::= {joint-iso-ccitt(2) ds(5) 4} */
#define MBEDTLS_OID_AT_CN                       MBEDTLS_OID_AT "\x03" /**< id-at-commonName AttributeType:= {id-at 3} */
#define MBEDTLS_OID_AT_SUR_NAME                 MBEDTLS_OID_AT "\x04" /**< id-at-surName AttributeType:= {id-at 4} */
#define MBEDTLS_OID_AT_SERIAL_NUMBER            MBEDTLS_OID_AT "\x05" /**< id-at-serialNumber AttributeType:= {id-at 5} */
#define MBEDTLS_OID_AT_COUNTRY                  MBEDTLS_OID_AT "\x06" /**< id-at-countryName AttributeType:= {id-at 6} */
#define MBEDTLS_OID_AT_LOCALITY                 MBEDTLS_OID_AT "\x07" /**< id-at-locality AttributeType:= {id-at 7} */
#define MBEDTLS_OID_AT_STATE                    MBEDTLS_OID_AT "\x08" /**< id-at-state AttributeType:= {id-at 8} */
#define MBEDTLS_OID_AT_ORGANIZATION             MBEDTLS_OID_AT "\x0A" /**< id-at-organizationName AttributeType:= {id-at 10} */
#define MBEDTLS_OID_AT_ORG_UNIT                 MBEDTLS_OID_AT "\x0B" /**< id-at-organizationalUnitName AttributeType:= {id-at 11} */
#define MBEDTLS_OID_AT_TITLE                    MBEDTLS_OID_AT "\x0C" /**< id-at-title AttributeType:= {id-at 12} */
#define MBEDTLS_OID_AT_POSTAL_ADDRESS           MBEDTLS_OID_AT "\x10" /**< id-at-postalAddress AttributeType:= {id-at 16} */
#define MBEDTLS_OID_AT_POSTAL_CODE              MBEDTLS_OID_AT "\x11" /**< id-at-postalCode AttributeType:= {id-at 17} */
#define MBEDTLS_OID_AT_GIVEN_NAME               MBEDTLS_OID_AT "\x2A" /**< id-at-givenName AttributeType:= {id-at 42} */
#define MBEDTLS_OID_AT_INITIALS                 MBEDTLS_OID_AT "\x2B" /**< id-at-initials AttributeType:= {id-at 43} */
#define MBEDTLS_OID_AT_GENERATION_QUALIFIER     MBEDTLS_OID_AT "\x2C" /**< id-at-generationQualifier AttributeType:= {id-at 44} */
#define MBEDTLS_OID_AT_UNIQUE_IDENTIFIER        MBEDTLS_OID_AT "\x2D" /**< id-at-uniqueIdentifier AttributType:= {id-at 45} */
#define MBEDTLS_OID_AT_DN_QUALIFIER             MBEDTLS_OID_AT "\x2E" /**< id-at-dnQualifier AttributeType:= {id-at 46} */
#define MBEDTLS_OID_AT_PSEUDONYM                MBEDTLS_OID_AT "\x41" /**< id-at-pseudonym AttributeType:= {id-at 65} */

#define MBEDTLS_OID_DOMAIN_COMPONENT            "\x09\x92\x26\x89\x93\xF2\x2C\x64\x01\x19" /** id-domainComponent AttributeType:= {itu-t(0) data(9) pss(2342) ucl(19200300) pilot(100) pilotAttributeType(1) domainComponent(25)} */

/*
 * OIDs for standard certificate extensions
 */
#define MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER    MBEDTLS_OID_ID_CE "\x23" /**< id-ce-authorityKeyIdentifier OBJECT IDENTIFIER ::=  { id-ce 35 } */
#define MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER      MBEDTLS_OID_ID_CE "\x0E" /**< id-ce-subjectKeyIdentifier OBJECT IDENTIFIER ::=  { id-ce 14 } */
#define MBEDTLS_OID_KEY_USAGE                   MBEDTLS_OID_ID_CE "\x0F" /**< id-ce-keyUsage OBJECT IDENTIFIER ::=  { id-ce 15 } */
#define MBEDTLS_OID_CERTIFICATE_POLICIES        MBEDTLS_OID_ID_CE "\x20" /**< id-ce-certificatePolicies OBJECT IDENTIFIER ::=  { id-ce 32 } */
#define MBEDTLS_OID_POLICY_MAPPINGS             MBEDTLS_OID_ID_CE "\x21" /**< id-ce-policyMappings OBJECT IDENTIFIER ::=  { id-ce 33 } */
#define MBEDTLS_OID_SUBJECT_ALT_NAME            MBEDTLS_OID_ID_CE "\x11" /**< id-ce-subjectAltName OBJECT IDENTIFIER ::=  { id-ce 17 } */
#define MBEDTLS_OID_ISSUER_ALT_NAME             MBEDTLS_OID_ID_CE "\x12" /**< id-ce-issuerAltName OBJECT IDENTIFIER ::=  { id-ce 18 } */
#define MBEDTLS_OID_SUBJECT_DIRECTORY_ATTRS     MBEDTLS_OID_ID_CE "\x09" /**< id-ce-subjectDirectoryAttributes OBJECT IDENTIFIER ::=  { id-ce 9 } */
#define MBEDTLS_OID_BASIC_CONSTRAINTS           MBEDTLS_OID_ID_CE "\x13" /**< id-ce-basicConstraints OBJECT IDENTIFIER ::=  { id-ce 19 } */
#define MBEDTLS_OID_NAME_CONSTRAINTS            MBEDTLS_OID_ID_CE "\x1E" /**< id-ce-nameConstraints OBJECT IDENTIFIER ::=  { id-ce 30 } */
#define MBEDTLS_OID_POLICY_CONSTRAINTS          MBEDTLS_OID_ID_CE "\x24" /**< id-ce-policyConstraints OBJECT IDENTIFIER ::=  { id-ce 36 } */
#define MBEDTLS_OID_EXTENDED_KEY_USAGE          MBEDTLS_OID_ID_CE "\x25" /**< id-ce-extKeyUsage OBJECT IDENTIFIER ::= { id-ce 37 } */
#define MBEDTLS_OID_CRL_DISTRIBUTION_POINTS     MBEDTLS_OID_ID_CE "\x1F" /**< id-ce-cRLDistributionPoints OBJECT IDENTIFIER ::=  { id-ce 31 } */
#define MBEDTLS_OID_INIHIBIT_ANYPOLICY          MBEDTLS_OID_ID_CE "\x36" /**< id-ce-inhibitAnyPolicy OBJECT IDENTIFIER ::=  { id-ce 54 } */
#define MBEDTLS_OID_FRESHEST_CRL                MBEDTLS_OID_ID_CE "\x2E" /**< id-ce-freshestCRL OBJECT IDENTIFIER ::=  { id-ce 46 } */

/*
 * Certificate policies
 */
#define MBEDTLS_OID_ANY_POLICY              MBEDTLS_OID_CERTIFICATE_POLICIES "\x00" /**< anyPolicy OBJECT IDENTIFIER ::= { id-ce-certificatePolicies 0 } */

/*
 * Netscape certificate extensions
 */
#define MBEDTLS_OID_NS_CERT                 MBEDTLS_OID_NETSCAPE "\x01"
#define MBEDTLS_OID_NS_CERT_TYPE            MBEDTLS_OID_NS_CERT  "\x01"
#define MBEDTLS_OID_NS_BASE_URL             MBEDTLS_OID_NS_CERT  "\x02"
#define MBEDTLS_OID_NS_REVOCATION_URL       MBEDTLS_OID_NS_CERT  "\x03"
#define MBEDTLS_OID_NS_CA_REVOCATION_URL    MBEDTLS_OID_NS_CERT  "\x04"
#define MBEDTLS_OID_NS_RENEWAL_URL          MBEDTLS_OID_NS_CERT  "\x07"
#define MBEDTLS_OID_NS_CA_POLICY_URL        MBEDTLS_OID_NS_CERT  "\x08"
#define MBEDTLS_OID_NS_SSL_SERVER_NAME      MBEDTLS_OID_NS_CERT  "\x0C"
#define MBEDTLS_OID_NS_COMMENT              MBEDTLS_OID_NS_CERT  "\x0D"
#define MBEDTLS_OID_NS_DATA_TYPE            MBEDTLS_OID_NETSCAPE "\x02"
#define MBEDTLS_OID_NS_CERT_SEQUENCE        MBEDTLS_OID_NS_DATA_TYPE "\x05"

/*
 * OIDs for CRL extensions
 */
#define MBEDTLS_OID_PRIVATE_KEY_USAGE_PERIOD    MBEDTLS_OID_ID_CE "\x10"
#define MBEDTLS_OID_CRL_NUMBER                  MBEDTLS_OID_ID_CE "\x14" /**< id-ce-cRLNumber OBJECT IDENTIFIER ::= { id-ce 20 } */

/*
 * X.509 v3 Extended key usage OIDs
 */
#define MBEDTLS_OID_ANY_EXTENDED_KEY_USAGE      MBEDTLS_OID_EXTENDED_KEY_USAGE "\x00" /**< anyExtendedKeyUsage OBJECT IDENTIFIER ::= { id-ce-extKeyUsage 0 } */

#define MBEDTLS_OID_KP                          MBEDTLS_OID_PKIX "\x03" /**< id-kp OBJECT IDENTIFIER ::= { id-pkix 3 } */
#define MBEDTLS_OID_SERVER_AUTH                 MBEDTLS_OID_KP "\x01" /**< id-kp-serverAuth OBJECT IDENTIFIER ::= { id-kp 1 } */
#define MBEDTLS_OID_CLIENT_AUTH                 MBEDTLS_OID_KP "\x02" /**< id-kp-clientAuth OBJECT IDENTIFIER ::= { id-kp 2 } */
#define MBEDTLS_OID_CODE_SIGNING                MBEDTLS_OID_KP "\x03" /**< id-kp-codeSigning OBJECT IDENTIFIER ::= { id-kp 3 } */
#define MBEDTLS_OID_EMAIL_PROTECTION            MBEDTLS_OID_KP "\x04" /**< id-kp-emailProtection OBJECT IDENTIFIER ::= { id-kp 4 } */
#define MBEDTLS_OID_TIME_STAMPING               MBEDTLS_OID_KP "\x08" /**< id-kp-timeStamping OBJECT IDENTIFIER ::= { id-kp 8 } */
#define MBEDTLS_OID_OCSP_SIGNING                MBEDTLS_OID_KP "\x09" /**< id-kp-OCSPSigning OBJECT IDENTIFIER ::= { id-kp 9 } */

/**
 * Wi-SUN Alliance Field Area Network
 * { iso(1) identified-organization(3) dod(6) internet(1)
 *                      private(4) enterprise(1) WiSUN(45605) FieldAreaNetwork(1) }
 */
#define MBEDTLS_OID_WISUN_FAN                   MBEDTLS_OID_INTERNET "\x04\x01\x82\xe4\x25\x01"

#define MBEDTLS_OID_ON                          MBEDTLS_OID_PKIX "\x08" /**< id-on OBJECT IDENTIFIER ::= { id-pkix 8 } */
#define MBEDTLS_OID_ON_HW_MODULE_NAME           MBEDTLS_OID_ON "\x04" /**< id-on-hardwareModuleName OBJECT IDENTIFIER ::= { id-on 4 } */

/*
 * PKCS definition OIDs
 */

#define MBEDTLS_OID_PKCS                MBEDTLS_OID_RSA_COMPANY "\x01" /**< pkcs OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) 1 } */
#define MBEDTLS_OID_PKCS1               MBEDTLS_OID_PKCS "\x01" /**< pkcs-1 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 1 } */
#define MBEDTLS_OID_PKCS5               MBEDTLS_OID_PKCS "\x05" /**< pkcs-5 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 5 } */
#define MBEDTLS_OID_PKCS9               MBEDTLS_OID_PKCS "\x09" /**< pkcs-9 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 9 } */
#define MBEDTLS_OID_PKCS12              MBEDTLS_OID_PKCS "\x0c" /**< pkcs-12 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 12 } */

/*
 * PKCS#1 OIDs
 */
#define MBEDTLS_OID_PKCS1_RSA           MBEDTLS_OID_PKCS1 "\x01" /**< rsaEncryption OBJECT IDENTIFIER ::= { pkcs-1 1 } */
#define MBEDTLS_OID_PKCS1_MD2           MBEDTLS_OID_PKCS1 "\x02" /**< md2WithRSAEncryption ::= { pkcs-1 2 } */
#define MBEDTLS_OID_PKCS1_MD4           MBEDTLS_OID_PKCS1 "\x03" /**< md4WithRSAEncryption ::= { pkcs-1 3 } */
#define MBEDTLS_OID_PKCS1_MD5           MBEDTLS_OID_PKCS1 "\x04" /**< md5WithRSAEncryption ::= { pkcs-1 4 } */
#define MBEDTLS_OID_PKCS1_SHA1          MBEDTLS_OID_PKCS1 "\x05" /**< sha1WithRSAEncryption ::= { pkcs-1 5 } */
#define MBEDTLS_OID_PKCS1_SHA224        MBEDTLS_OID_PKCS1 "\x0e" /**< sha224WithRSAEncryption ::= { pkcs-1 14 } */
#define MBEDTLS_OID_PKCS1_SHA256        MBEDTLS_OID_PKCS1 "\x0b" /**< sha256WithRSAEncryption ::= { pkcs-1 11 } */
#define MBEDTLS_OID_PKCS1_SHA384        MBEDTLS_OID_PKCS1 "\x0c" /**< sha384WithRSAEncryption ::= { pkcs-1 12 } */
#define MBEDTLS_OID_PKCS1_SHA512        MBEDTLS_OID_PKCS1 "\x0d" /**< sha512WithRSAEncryption ::= { pkcs-1 13 } */

#define MBEDTLS_OID_RSA_SHA_OBS         "\x2B\x0E\x03\x02\x1D"

#define MBEDTLS_OID_PKCS9_EMAIL         MBEDTLS_OID_PKCS9 "\x01" /**< emailAddress AttributeType ::= { pkcs-9 1 } */

/* RFC 4055 */
#define MBEDTLS_OID_RSASSA_PSS          MBEDTLS_OID_PKCS1 "\x0a" /**< id-RSASSA-PSS ::= { pkcs-1 10 } */
#define MBEDTLS_OID_MGF1                MBEDTLS_OID_PKCS1 "\x08" /**< id-mgf1 ::= { pkcs-1 8 } */

/*
 * Digest algorithms
 */
#define MBEDTLS_OID_DIGEST_ALG_MD2              MBEDTLS_OID_RSA_COMPANY "\x02\x02" /**< id-mbedtls_md2 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 2 } */
#define MBEDTLS_OID_DIGEST_ALG_MD4              MBEDTLS_OID_RSA_COMPANY "\x02\x04" /**< id-mbedtls_md4 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 4 } */
#define MBEDTLS_OID_DIGEST_ALG_MD5              MBEDTLS_OID_RSA_COMPANY "\x02\x05" /**< id-mbedtls_md5 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 5 } */
#define MBEDTLS_OID_DIGEST_ALG_SHA1             MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_OIW_SECSIG_SHA1 /**< id-mbedtls_sha1 OBJECT IDENTIFIER ::= { iso(1) identified-organization(3) oiw(14) secsig(3) algorithms(2) 26 } */
#define MBEDTLS_OID_DIGEST_ALG_SHA224           MBEDTLS_OID_NIST_ALG "\x02\x04" /**< id-sha224 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 4 } */
#define MBEDTLS_OID_DIGEST_ALG_SHA256           MBEDTLS_OID_NIST_ALG "\x02\x01" /**< id-mbedtls_sha256 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 1 } */

#define MBEDTLS_OID_DIGEST_ALG_SHA384           MBEDTLS_OID_NIST_ALG "\x02\x02" /**< id-sha384 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 2 } */

#define MBEDTLS_OID_DIGEST_ALG_SHA512           MBEDTLS_OID_NIST_ALG "\x02\x03" /**< id-mbedtls_sha512 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 3 } */

#define MBEDTLS_OID_DIGEST_ALG_RIPEMD160        MBEDTLS_OID_TELETRUST "\x03\x02\x01" /**< id-ripemd160 OBJECT IDENTIFIER :: { iso(1) identified-organization(3) teletrust(36) algorithm(3) hashAlgorithm(2) ripemd160(1) } */

#define MBEDTLS_OID_HMAC_SHA1                   MBEDTLS_OID_RSA_COMPANY "\x02\x07" /**< id-hmacWithSHA1 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 7 } */

#define MBEDTLS_OID_HMAC_SHA224                 MBEDTLS_OID_RSA_COMPANY "\x02\x08" /**< id-hmacWithSHA224 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 8 } */

#define MBEDTLS_OID_HMAC_SHA256                 MBEDTLS_OID_RSA_COMPANY "\x02\x09" /**< id-hmacWithSHA256 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 9 } */

#define MBEDTLS_OID_HMAC_SHA384                 MBEDTLS_OID_RSA_COMPANY "\x02\x0A" /**< id-hmacWithSHA384 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 10 } */

#define MBEDTLS_OID_HMAC_SHA512                 MBEDTLS_OID_RSA_COMPANY "\x02\x0B" /**< id-hmacWithSHA512 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 11 } */

/*
 * Encryption algorithms
 */
#define MBEDTLS_OID_DES_CBC                     MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_OIW_SECSIG_ALG "\x07" /**< desCBC OBJECT IDENTIFIER ::= { iso(1) identified-organization(3) oiw(14) secsig(3) algorithms(2) 7 } */
#define MBEDTLS_OID_DES_EDE3_CBC                MBEDTLS_OID_RSA_COMPANY "\x03\x07" /**< des-ede3-cbc OBJECT IDENTIFIER ::= { iso(1) member-body(2) -- us(840) rsadsi(113549) encryptionAlgorithm(3) 7 } */
#define MBEDTLS_OID_AES                         MBEDTLS_OID_NIST_ALG "\x01" /** aes OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistAlgorithm(4) 1 } */

/*
 * Key Wrapping algorithms
 */
/*
 * RFC 5649
 */
#define MBEDTLS_OID_AES128_KW                   MBEDTLS_OID_AES "\x05" /** id-aes128-wrap     OBJECT IDENTIFIER ::= { aes 5 } */
#define MBEDTLS_OID_AES128_KWP                  MBEDTLS_OID_AES "\x08" /** id-aes128-wrap-pad OBJECT IDENTIFIER ::= { aes 8 } */
#define MBEDTLS_OID_AES192_KW                   MBEDTLS_OID_AES "\x19" /** id-aes192-wrap     OBJECT IDENTIFIER ::= { aes 25 } */
#define MBEDTLS_OID_AES192_KWP                  MBEDTLS_OID_AES "\x1c" /** id-aes192-wrap-pad OBJECT IDENTIFIER ::= { aes 28 } */
#define MBEDTLS_OID_AES256_KW                   MBEDTLS_OID_AES "\x2d" /** id-aes256-wrap     OBJECT IDENTIFIER ::= { aes 45 } */
#define MBEDTLS_OID_AES256_KWP                  MBEDTLS_OID_AES "\x30" /** id-aes256-wrap-pad OBJECT IDENTIFIER ::= { aes 48 } */
/*
 * PKCS#5 OIDs
 */
#define MBEDTLS_OID_PKCS5_PBKDF2                MBEDTLS_OID_PKCS5 "\x0c" /**< id-PBKDF2 OBJECT IDENTIFIER ::= {pkcs-5 12} */
#define MBEDTLS_OID_PKCS5_PBES2                 MBEDTLS_OID_PKCS5 "\x0d" /**< id-PBES2 OBJECT IDENTIFIER ::= {pkcs-5 13} */
#define MBEDTLS_OID_PKCS5_PBMAC1                MBEDTLS_OID_PKCS5 "\x0e" /**< id-PBMAC1 OBJECT IDENTIFIER ::= {pkcs-5 14} */

/*
 * PKCS#5 PBES1 algorithms
 */
#define MBEDTLS_OID_PKCS5_PBE_MD2_DES_CBC       MBEDTLS_OID_PKCS5 "\x01" /**< pbeWithMD2AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 1} */
#define MBEDTLS_OID_PKCS5_PBE_MD2_RC2_CBC       MBEDTLS_OID_PKCS5 "\x04" /**< pbeWithMD2AndRC2-CBC OBJECT IDENTIFIER ::= {pkcs-5 4} */
#define MBEDTLS_OID_PKCS5_PBE_MD5_DES_CBC       MBEDTLS_OID_PKCS5 "\x03" /**< pbeWithMD5AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 3} */
#define MBEDTLS_OID_PKCS5_PBE_MD5_RC2_CBC       MBEDTLS_OID_PKCS5 "\x06" /**< pbeWithMD5AndRC2-CBC OBJECT IDENTIFIER ::= {pkcs-5 6} */
#define MBEDTLS_OID_PKCS5_PBE_SHA1_DES_CBC      MBEDTLS_OID_PKCS5 "\x0a" /**< pbeWithSHA1AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 10} */
#define MBEDTLS_OID_PKCS5_PBE_SHA1_RC2_CBC      MBEDTLS_OID_PKCS5 "\x0b" /**< pbeWithSHA1AndRC2-CBC OBJECT IDENTIFIER ::= {pkcs-5 11} */

/*
 * PKCS#8 OIDs
 */
#define MBEDTLS_OID_PKCS9_CSR_EXT_REQ           MBEDTLS_OID_PKCS9 "\x0e" /**< extensionRequest OBJECT IDENTIFIER ::= {pkcs-9 14} */

/*
 * PKCS#12 PBE OIDs
 */
#define MBEDTLS_OID_PKCS12_PBE                      MBEDTLS_OID_PKCS12 "\x01" /**< pkcs-12PbeIds OBJECT IDENTIFIER ::= {pkcs-12 1} */

#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_128         MBEDTLS_OID_PKCS12_PBE "\x01" /**< pbeWithSHAAnd128BitRC4 OBJECT IDENTIFIER ::= {pkcs-12PbeIds 1} */
#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_40          MBEDTLS_OID_PKCS12_PBE "\x02" /**< pbeWithSHAAnd40BitRC4 OBJECT IDENTIFIER ::= {pkcs-12PbeIds 2} */
#define MBEDTLS_OID_PKCS12_PBE_SHA1_DES3_EDE_CBC    MBEDTLS_OID_PKCS12_PBE "\x03" /**< pbeWithSHAAnd3-KeyTripleDES-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 3} */
#define MBEDTLS_OID_PKCS12_PBE_SHA1_DES2_EDE_CBC    MBEDTLS_OID_PKCS12_PBE "\x04" /**< pbeWithSHAAnd2-KeyTripleDES-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 4} */
#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC2_128_CBC     MBEDTLS_OID_PKCS12_PBE "\x05" /**< pbeWithSHAAnd128BitRC2-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 5} */
#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC2_40_CBC      MBEDTLS_OID_PKCS12_PBE "\x06" /**< pbeWithSHAAnd40BitRC2-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 6} */

/*
 * EC key algorithms from RFC 5480
 */

/* id-ecPublicKey OBJECT IDENTIFIER ::= {
 *       iso(1) member-body(2) us(840) ansi-X9-62(10045) keyType(2) 1 } */
#define MBEDTLS_OID_EC_ALG_UNRESTRICTED         MBEDTLS_OID_ANSI_X9_62 "\x02\01"

/*   id-ecDH OBJECT IDENTIFIER ::= {
 *     iso(1) identified-organization(3) certicom(132)
 *     schemes(1) ecdh(12) } */
#define MBEDTLS_OID_EC_ALG_ECDH                 MBEDTLS_OID_CERTICOM "\x01\x0c"

/*
 * ECParameters namedCurve identifiers, from RFC 5480, RFC 5639, and SEC2
 */

/* secp192r1 OBJECT IDENTIFIER ::= {
 *   iso(1) member-body(2) us(840) ansi-X9-62(10045) curves(3) prime(1) 1 } */
#define MBEDTLS_OID_EC_GRP_SECP192R1        MBEDTLS_OID_ANSI_X9_62 "\x03\x01\x01"

/* secp224r1 OBJECT IDENTIFIER ::= {
 *   iso(1) identified-organization(3) certicom(132) curve(0) 33 } */
#define MBEDTLS_OID_EC_GRP_SECP224R1        MBEDTLS_OID_CERTICOM "\x00\x21"

/* secp256r1 OBJECT IDENTIFIER ::= {
 *   iso(1) member-body(2) us(840) ansi-X9-62(10045) curves(3) prime(1) 7 } */
#define MBEDTLS_OID_EC_GRP_SECP256R1        MBEDTLS_OID_ANSI_X9_62 "\x03\x01\x07"

/* secp384r1 OBJECT IDENTIFIER ::= {
 *   iso(1) identified-organization(3) certicom(132) curve(0) 34 } */
#define MBEDTLS_OID_EC_GRP_SECP384R1        MBEDTLS_OID_CERTICOM "\x00\x22"

/* secp521r1 OBJECT IDENTIFIER ::= {
 *   iso(1) identified-organization(3) certicom(132) curve(0) 35 } */
#define MBEDTLS_OID_EC_GRP_SECP521R1        MBEDTLS_OID_CERTICOM "\x00\x23"

/* secp192k1 OBJECT IDENTIFIER ::= {
 *   iso(1) identified-organization(3) certicom(132) curve(0) 31 } */
#define MBEDTLS_OID_EC_GRP_SECP192K1        MBEDTLS_OID_CERTICOM "\x00\x1f"

/* secp224k1 OBJECT IDENTIFIER ::= {
 *   iso(1) identified-organization(3) certicom(132) curve(0) 32 } */
#define MBEDTLS_OID_EC_GRP_SECP224K1        MBEDTLS_OID_CERTICOM "\x00\x20"

/* secp256k1 OBJECT IDENTIFIER ::= {
 *   iso(1) identified-organization(3) certicom(132) curve(0) 10 } */
#define MBEDTLS_OID_EC_GRP_SECP256K1        MBEDTLS_OID_CERTICOM "\x00\x0a"

/* RFC 5639 4.1
 * ecStdCurvesAndGeneration OBJECT IDENTIFIER::= {iso(1)
 * identified-organization(3) teletrust(36) algorithm(3) signature-
 * algorithm(3) ecSign(2) 8}
 * ellipticCurve OBJECT IDENTIFIER ::= {ecStdCurvesAndGeneration 1}
 * versionOne OBJECT IDENTIFIER ::= {ellipticCurve 1} */
#define MBEDTLS_OID_EC_BRAINPOOL_V1         MBEDTLS_OID_TELETRUST "\x03\x03\x02\x08\x01\x01"

/* brainpoolP256r1 OBJECT IDENTIFIER ::= {versionOne 7} */
#define MBEDTLS_OID_EC_GRP_BP256R1          MBEDTLS_OID_EC_BRAINPOOL_V1 "\x07"

/* brainpoolP384r1 OBJECT IDENTIFIER ::= {versionOne 11} */
#define MBEDTLS_OID_EC_GRP_BP384R1          MBEDTLS_OID_EC_BRAINPOOL_V1 "\x0B"

/* brainpoolP512r1 OBJECT IDENTIFIER ::= {versionOne 13} */
#define MBEDTLS_OID_EC_GRP_BP512R1          MBEDTLS_OID_EC_BRAINPOOL_V1 "\x0D"

/*
 * SEC1 C.1
 *
 * prime-field OBJECT IDENTIFIER ::= { id-fieldType 1 }
 * id-fieldType OBJECT IDENTIFIER ::= { ansi-X9-62 fieldType(1)}
 */
#define MBEDTLS_OID_ANSI_X9_62_FIELD_TYPE   MBEDTLS_OID_ANSI_X9_62 "\x01"
#define MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD  MBEDTLS_OID_ANSI_X9_62_FIELD_TYPE "\x01"

/*
 * ECDSA signature identifiers, from RFC 5480
 */
#define MBEDTLS_OID_ANSI_X9_62_SIG          MBEDTLS_OID_ANSI_X9_62 "\x04" /* signatures(4) */
#define MBEDTLS_OID_ANSI_X9_62_SIG_SHA2     MBEDTLS_OID_ANSI_X9_62_SIG "\x03" /* ecdsa-with-SHA2(3) */

/* ecdsa-with-SHA1 OBJECT IDENTIFIER ::= {
 *   iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4) 1 } */
#define MBEDTLS_OID_ECDSA_SHA1              MBEDTLS_OID_ANSI_X9_62_SIG "\x01"

/* ecdsa-with-SHA224 OBJECT IDENTIFIER ::= {
 *   iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4)
 *   ecdsa-with-SHA2(3) 1 } */
#define MBEDTLS_OID_ECDSA_SHA224            MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 "\x01"

/* ecdsa-with-SHA256 OBJECT IDENTIFIER ::= {
 *   iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4)
 *   ecdsa-with-SHA2(3) 2 } */
#define MBEDTLS_OID_ECDSA_SHA256            MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 "\x02"

/* ecdsa-with-SHA384 OBJECT IDENTIFIER ::= {
 *   iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4)
 *   ecdsa-with-SHA2(3) 3 } */
#define MBEDTLS_OID_ECDSA_SHA384            MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 "\x03"

/* ecdsa-with-SHA512 OBJECT IDENTIFIER ::= {
 *   iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4)
 *   ecdsa-with-SHA2(3) 4 } */
#define MBEDTLS_OID_ECDSA_SHA512            MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 "\x04"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief Base OID descriptor structure
 */
typedef struct mbedtls_oid_descriptor_t
{
    const char *asn1;               /*!< OID ASN.1 representation       */
    size_t asn1_len;                /*!< length of asn1                 */
    const char *name;               /*!< official name (e.g. from RFC)  */
    const char *description;        /*!< human friendly description     */
} mbedtls_oid_descriptor_t;

/**
 * \brief           Translate an ASN.1 OID into its numeric representation
 *                  (e.g. "\x2A\x86\x48\x86\xF7\x0D" into "1.2.840.113549")
 *
 * \param buf       buffer to put representation in
 * \param size      size of the buffer
 * \param oid       OID to translate
 *
 * \return          Length of the string written (excluding final NULL) or
 *                  MBEDTLS_ERR_OID_BUF_TOO_SMALL in case of error
 */
int mbedtls_oid_get_numeric_string( char *buf, size_t size, const mbedtls_asn1_buf *oid );

/**
 * \brief          Translate an X.509 extension OID into local values
 *
 * \param oid      OID to use
 * \param ext_type place to store the extension type
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_x509_ext_type( const mbedtls_asn1_buf *oid, int *ext_type );

/**
 * \brief          Translate an X.509 attribute type OID into the short name
 *                 (e.g. the OID for an X520 Common Name into "CN")
 *
 * \param oid      OID to use
 * \param short_name    place to store the string pointer
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_attr_short_name( const mbedtls_asn1_buf *oid, const char **short_name );

/**
 * \brief          Translate PublicKeyAlgorithm OID into pk_type
 *
 * \param oid      OID to use
 * \param pk_alg   place to store public key algorithm
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_pk_alg( const mbedtls_asn1_buf *oid, mbedtls_pk_type_t *pk_alg );

/**
 * \brief          Translate pk_type into PublicKeyAlgorithm OID
 *
 * \param pk_alg   Public key type to look for
 * \param oid      place to store ASN.1 OID string pointer
 * \param olen     length of the OID
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_oid_by_pk_alg( mbedtls_pk_type_t pk_alg,
                           const char **oid, size_t *olen );

#if defined(MBEDTLS_ECP_C)
/**
 * \brief          Translate NamedCurve OID into an EC group identifier
 *
 * \param oid      OID to use
 * \param grp_id   place to store group id
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_ec_grp( const mbedtls_asn1_buf *oid, mbedtls_ecp_group_id *grp_id );

/**
 * \brief          Translate EC group identifier into NamedCurve OID
 *
 * \param grp_id   EC group identifier
 * \param oid      place to store ASN.1 OID string pointer
 * \param olen     length of the OID
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_oid_by_ec_grp( mbedtls_ecp_group_id grp_id,
                           const char **oid, size_t *olen );
#endif /* MBEDTLS_ECP_C */

#if defined(MBEDTLS_MD_C)
/**
 * \brief          Translate SignatureAlgorithm OID into md_type and pk_type
 *
 * \param oid      OID to use
 * \param md_alg   place to store message digest algorithm
 * \param pk_alg   place to store public key algorithm
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_sig_alg( const mbedtls_asn1_buf *oid,
                     mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg );

/**
 * \brief          Translate SignatureAlgorithm OID into description
 *
 * \param oid      OID to use
 * \param desc     place to store string pointer
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_sig_alg_desc( const mbedtls_asn1_buf *oid, const char **desc );

/**
 * \brief          Translate md_type and pk_type into SignatureAlgorithm OID
 *
 * \param md_alg   message digest algorithm
 * \param pk_alg   public key algorithm
 * \param oid      place to store ASN.1 OID string pointer
 * \param olen     length of the OID
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_oid_by_sig_alg( mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
                            const char **oid, size_t *olen );

/**
 * \brief          Translate hash algorithm OID into md_type
 *
 * \param oid      OID to use
 * \param md_alg   place to store message digest algorithm
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_md_alg( const mbedtls_asn1_buf *oid, mbedtls_md_type_t *md_alg );

/**
 * \brief          Translate hmac algorithm OID into md_type
 *
 * \param oid      OID to use
 * \param md_hmac  place to store message hmac algorithm
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_md_hmac( const mbedtls_asn1_buf *oid, mbedtls_md_type_t *md_hmac );
#endif /* MBEDTLS_MD_C */

/**
 * \brief          Translate Extended Key Usage OID into description
 *
 * \param oid      OID to use
 * \param desc     place to store string pointer
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_extended_key_usage( const mbedtls_asn1_buf *oid, const char **desc );

/**
 * \brief          Translate certificate policies OID into description
 *
 * \param oid      OID to use
 * \param desc     place to store string pointer
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_certificate_policies( const mbedtls_asn1_buf *oid, const char **desc );

/**
 * \brief          Translate md_type into hash algorithm OID
 *
 * \param md_alg   message digest algorithm
 * \param oid      place to store ASN.1 OID string pointer
 * \param olen     length of the OID
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_oid_by_md( mbedtls_md_type_t md_alg, const char **oid, size_t *olen );

#if defined(MBEDTLS_CIPHER_C)
/**
 * \brief          Translate encryption algorithm OID into cipher_type
 *
 * \param oid           OID to use
 * \param cipher_alg    place to store cipher algorithm
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_cipher_alg( const mbedtls_asn1_buf *oid, mbedtls_cipher_type_t *cipher_alg );
#endif /* MBEDTLS_CIPHER_C */

#if defined(MBEDTLS_PKCS12_C)
/**
 * \brief          Translate PKCS#12 PBE algorithm OID into md_type and
 *                 cipher_type
 *
 * \param oid           OID to use
 * \param md_alg        place to store message digest algorithm
 * \param cipher_alg    place to store cipher algorithm
 *
 * \return         0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
 */
int mbedtls_oid_get_pkcs12_pbe_alg( const mbedtls_asn1_buf *oid, mbedtls_md_type_t *md_alg,
                            mbedtls_cipher_type_t *cipher_alg );
#endif /* MBEDTLS_PKCS12_C */

#ifdef __cplusplus
}
#endif

#endif /* oid.h */


/********* Start of file include/mbedtls/ripemd160.h ************/

/**
 * \file ripemd160.h
 *
 * \brief RIPE MD-160 message digest
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_RIPEMD160_H
#define MBEDTLS_RIPEMD160_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

#include <stddef.h>
#include <stdint.h>

/* MBEDTLS_ERR_RIPEMD160_HW_ACCEL_FAILED is deprecated and should not be used.
 */
/** RIPEMD160 hardware accelerator failed */
#define MBEDTLS_ERR_RIPEMD160_HW_ACCEL_FAILED             -0x0031

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_RIPEMD160_ALT)
// Regular implementation
//

/**
 * \brief          RIPEMD-160 context structure
 */
typedef struct mbedtls_ripemd160_context
{
    uint32_t total[2];          /*!< number of bytes processed  */
    uint32_t state[5];          /*!< intermediate digest state  */
    unsigned char buffer[64];   /*!< data block being processed */
}
mbedtls_ripemd160_context;

#else  /* MBEDTLS_RIPEMD160_ALT */

#endif /* MBEDTLS_RIPEMD160_ALT */

/**
 * \brief          Initialize RIPEMD-160 context
 *
 * \param ctx      RIPEMD-160 context to be initialized
 */
void mbedtls_ripemd160_init( mbedtls_ripemd160_context *ctx );

/**
 * \brief          Clear RIPEMD-160 context
 *
 * \param ctx      RIPEMD-160 context to be cleared
 */
void mbedtls_ripemd160_free( mbedtls_ripemd160_context *ctx );

/**
 * \brief          Clone (the state of) an RIPEMD-160 context
 *
 * \param dst      The destination context
 * \param src      The context to be cloned
 */
void mbedtls_ripemd160_clone( mbedtls_ripemd160_context *dst,
                        const mbedtls_ripemd160_context *src );

/**
 * \brief          RIPEMD-160 context setup
 *
 * \param ctx      context to be initialized
 *
 * \return         0 if successful
 */
int mbedtls_ripemd160_starts_ret( mbedtls_ripemd160_context *ctx );

/**
 * \brief          RIPEMD-160 process buffer
 *
 * \param ctx      RIPEMD-160 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 *
 * \return         0 if successful
 */
int mbedtls_ripemd160_update_ret( mbedtls_ripemd160_context *ctx,
                                  const unsigned char *input,
                                  size_t ilen );

/**
 * \brief          RIPEMD-160 final digest
 *
 * \param ctx      RIPEMD-160 context
 * \param output   RIPEMD-160 checksum result
 *
 * \return         0 if successful
 */
int mbedtls_ripemd160_finish_ret( mbedtls_ripemd160_context *ctx,
                                  unsigned char output[20] );

/**
 * \brief          RIPEMD-160 process data block (internal use only)
 *
 * \param ctx      RIPEMD-160 context
 * \param data     buffer holding one block of data
 *
 * \return         0 if successful
 */
int mbedtls_internal_ripemd160_process( mbedtls_ripemd160_context *ctx,
                                        const unsigned char data[64] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          RIPEMD-160 context setup
 *
 * \deprecated     Superseded by mbedtls_ripemd160_starts_ret() in 2.7.0
 *
 * \param ctx      context to be initialized
 */
MBEDTLS_DEPRECATED void mbedtls_ripemd160_starts(
                                            mbedtls_ripemd160_context *ctx );

/**
 * \brief          RIPEMD-160 process buffer
 *
 * \deprecated     Superseded by mbedtls_ripemd160_update_ret() in 2.7.0
 *
 * \param ctx      RIPEMD-160 context
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 */
MBEDTLS_DEPRECATED void mbedtls_ripemd160_update(
                                                mbedtls_ripemd160_context *ctx,
                                                const unsigned char *input,
                                                size_t ilen );

/**
 * \brief          RIPEMD-160 final digest
 *
 * \deprecated     Superseded by mbedtls_ripemd160_finish_ret() in 2.7.0
 *
 * \param ctx      RIPEMD-160 context
 * \param output   RIPEMD-160 checksum result
 */
MBEDTLS_DEPRECATED void mbedtls_ripemd160_finish(
                                                mbedtls_ripemd160_context *ctx,
                                                unsigned char output[20] );

/**
 * \brief          RIPEMD-160 process data block (internal use only)
 *
 * \deprecated     Superseded by mbedtls_internal_ripemd160_process() in 2.7.0
 *
 * \param ctx      RIPEMD-160 context
 * \param data     buffer holding one block of data
 */
MBEDTLS_DEPRECATED void mbedtls_ripemd160_process(
                                            mbedtls_ripemd160_context *ctx,
                                            const unsigned char data[64] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

/**
 * \brief          Output = RIPEMD-160( input buffer )
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   RIPEMD-160 checksum result
 *
 * \return         0 if successful
 */
int mbedtls_ripemd160_ret( const unsigned char *input,
                           size_t ilen,
                           unsigned char output[20] );

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
 * \brief          Output = RIPEMD-160( input buffer )
 *
 * \deprecated     Superseded by mbedtls_ripemd160_ret() in 2.7.0
 *
 * \param input    buffer holding the data
 * \param ilen     length of the input data
 * \param output   RIPEMD-160 checksum result
 */
MBEDTLS_DEPRECATED void mbedtls_ripemd160( const unsigned char *input,
                                           size_t ilen,
                                           unsigned char output[20] );

#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */

#if defined(MBEDTLS_SELF_TEST)

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int mbedtls_ripemd160_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_ripemd160.h */


/********* Start of file include/mbedtls/hkdf.h ************/

/**
 * \file hkdf.h
 *
 * \brief   This file contains the HKDF interface.
 *
 *          The HMAC-based Extract-and-Expand Key Derivation Function (HKDF) is
 *          specified by RFC 5869.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
#ifndef MBEDTLS_HKDF_H
#define MBEDTLS_HKDF_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif



/**
 *  \name HKDF Error codes
 *  \{
 */
/** Bad input parameters to function. */
#define MBEDTLS_ERR_HKDF_BAD_INPUT_DATA  -0x5F80
/* \} name */

#ifdef __cplusplus
extern "C" {
#endif

/**
 *  \brief  This is the HMAC-based Extract-and-Expand Key Derivation Function
 *          (HKDF).
 *
 *  \param  md        A hash function; md.size denotes the length of the hash
 *                    function output in bytes.
 *  \param  salt      An optional salt value (a non-secret random value);
 *                    if the salt is not provided, a string of all zeros of
 *                    md.size length is used as the salt.
 *  \param  salt_len  The length in bytes of the optional \p salt.
 *  \param  ikm       The input keying material.
 *  \param  ikm_len   The length in bytes of \p ikm.
 *  \param  info      An optional context and application specific information
 *                    string. This can be a zero-length string.
 *  \param  info_len  The length of \p info in bytes.
 *  \param  okm       The output keying material of \p okm_len bytes.
 *  \param  okm_len   The length of the output keying material in bytes. This
 *                    must be less than or equal to 255 * md.size bytes.
 *
 *  \return 0 on success.
 *  \return #MBEDTLS_ERR_HKDF_BAD_INPUT_DATA when the parameters are invalid.
 *  \return An MBEDTLS_ERR_MD_* error for errors returned from the underlying
 *          MD layer.
 */
int mbedtls_hkdf( const mbedtls_md_info_t *md, const unsigned char *salt,
                  size_t salt_len, const unsigned char *ikm, size_t ikm_len,
                  const unsigned char *info, size_t info_len,
                  unsigned char *okm, size_t okm_len );

/**
 *  \brief  Take the input keying material \p ikm and extract from it a
 *          fixed-length pseudorandom key \p prk.
 *
 *  \warning    This function should only be used if the security of it has been
 *              studied and established in that particular context (eg. TLS 1.3
 *              key schedule). For standard HKDF security guarantees use
 *              \c mbedtls_hkdf instead.
 *
 *  \param       md        A hash function; md.size denotes the length of the
 *                         hash function output in bytes.
 *  \param       salt      An optional salt value (a non-secret random value);
 *                         if the salt is not provided, a string of all zeros
 *                         of md.size length is used as the salt.
 *  \param       salt_len  The length in bytes of the optional \p salt.
 *  \param       ikm       The input keying material.
 *  \param       ikm_len   The length in bytes of \p ikm.
 *  \param[out]  prk       A pseudorandom key of at least md.size bytes.
 *
 *  \return 0 on success.
 *  \return #MBEDTLS_ERR_HKDF_BAD_INPUT_DATA when the parameters are invalid.
 *  \return An MBEDTLS_ERR_MD_* error for errors returned from the underlying
 *          MD layer.
 */
int mbedtls_hkdf_extract( const mbedtls_md_info_t *md,
                          const unsigned char *salt, size_t salt_len,
                          const unsigned char *ikm, size_t ikm_len,
                          unsigned char *prk );

/**
 *  \brief  Expand the supplied \p prk into several additional pseudorandom
 *          keys, which is the output of the HKDF.
 *
 *  \warning    This function should only be used if the security of it has been
 *              studied and established in that particular context (eg. TLS 1.3
 *              key schedule). For standard HKDF security guarantees use
 *              \c mbedtls_hkdf instead.
 *
 *  \param  md        A hash function; md.size denotes the length of the hash
 *                    function output in bytes.
 *  \param  prk       A pseudorandom key of at least md.size bytes. \p prk is
 *                    usually the output from the HKDF extract step.
 *  \param  prk_len   The length in bytes of \p prk.
 *  \param  info      An optional context and application specific information
 *                    string. This can be a zero-length string.
 *  \param  info_len  The length of \p info in bytes.
 *  \param  okm       The output keying material of \p okm_len bytes.
 *  \param  okm_len   The length of the output keying material in bytes. This
 *                    must be less than or equal to 255 * md.size bytes.
 *
 *  \return 0 on success.
 *  \return #MBEDTLS_ERR_HKDF_BAD_INPUT_DATA when the parameters are invalid.
 *  \return An MBEDTLS_ERR_MD_* error for errors returned from the underlying
 *          MD layer.
 */
int mbedtls_hkdf_expand( const mbedtls_md_info_t *md, const unsigned char *prk,
                         size_t prk_len, const unsigned char *info,
                         size_t info_len, unsigned char *okm, size_t okm_len );

#ifdef __cplusplus
}
#endif

#endif /* hkdf.h */


/********* Start of file include/mbedtls/version.h ************/

/**
 * \file version.h
 *
 * \brief Run-time version information
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
/*
 * This set of compile-time defines and run-time variables can be used to
 * determine the version number of the mbed TLS library used.
 */
#ifndef MBEDTLS_VERSION_H
#define MBEDTLS_VERSION_H

#if !defined(MBEDTLS_CONFIG_FILE)

#else

#endif

/**
 * The version number x.y.z is split into three parts.
 * Major, Minor, Patchlevel
 */
#define MBEDTLS_VERSION_MAJOR  2
#define MBEDTLS_VERSION_MINOR  28
#define MBEDTLS_VERSION_PATCH  0

/**
 * The single version number has the following structure:
 *    MMNNPP00
 *    Major version | Minor version | Patch version
 */
#define MBEDTLS_VERSION_NUMBER         0x021C0000
#define MBEDTLS_VERSION_STRING         "2.28.0"
#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.28.0"

#if defined(MBEDTLS_VERSION_C)

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Get the version number.
 *
 * \return          The constructed version number in the format
 *                  MMNNPP00 (Major, Minor, Patch).
 */
unsigned int mbedtls_version_get_number( void );

/**
 * Get the version string ("x.y.z").
 *
 * \param string    The string that will receive the value.
 *                  (Should be at least 9 bytes in size)
 */
void mbedtls_version_get_string( char *string );

/**
 * Get the full version string ("mbed TLS x.y.z").
 *
 * \param string    The string that will receive the value. The mbed TLS version
 *                  string will use 18 bytes AT MOST including a terminating
 *                  null byte.
 *                  (So the buffer should be at least 18 bytes to receive this
 *                  version string).
 */
void mbedtls_version_get_string_full( char *string );

/**
 * \brief           Check if support for a feature was compiled into this
 *                  mbed TLS binary. This allows you to see at runtime if the
 *                  library was for instance compiled with or without
 *                  Multi-threading support.
 *
 * \note            only checks against defines in the sections "System
 *                  support", "mbed TLS modules" and "mbed TLS feature
 *                  support" in config.h
 *
 * \param feature   The string for the define to check (e.g. "MBEDTLS_AES_C")
 *
 * \return          0 if the feature is present,
 *                  -1 if the feature is not present and
 *                  -2 if support for feature checking as a whole was not
 *                  compiled in.
 */
int mbedtls_version_check_feature( const char *feature );

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_VERSION_C */

#endif /* version.h */

#endif /* ME_COM_MBEDTLS */