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 (on some platforms)
 *      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.
 *
 * \note If MBEDTLS_TIMING_C is set - to enable the semi-portable timing
 *       interface - timing.c will include time.h on suitable platforms
 *       regardless of the setting of MBEDTLS_HAVE_TIME, unless
 *       MBEDTLS_TIMING_ALT is used. See timing.c for more information.
 */
#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, please 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.
 *
 * This option:
 * - Adds xxx_restartable() variants of existing operations in the
 *   following modules, with corresponding restart context types:
 *   - ECP (for Short Weierstrass curves only): scalar multiplication (mul),
 *     linear combination (muladd);
 *   - ECDSA: signature generation & verification;
 *   - PK: signature generation & verification;
 *   - X509: certificate chain verification.
 * - Adds mbedtls_ecdh_enable_restart() in the ECDH module.
 * - Changes the behaviour of TLS 1.2 clients (not servers) when using the
 *   ECDHE-ECDSA key exchange (not other key exchanges) to make all ECC
 *   computations restartable:
 *   - ECDH operations from the key exchange, only for Short Weierstrass
 *     curves;
 *   - verification of the server's key exchange signature;
 *   - verification of the server's certificate chain;
 *   - generation of the client's signature if client authentication is used,
 *     with an ECC key/certificate.
 *
 * \note  In the cases above, the usual SSL/TLS functions, such as
 *        mbedtls_ssl_handshake(), can now return
 *        MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS.
 *
 * \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,
 *        MBEDTLS_ECDH_LEGACY_CONTEXT, and MBEDTLS_USE_PSA_CRYPTO.
 *
 * Requires: MBEDTLS_ECP_C
 *
 * Uncomment this macro to enable restartable ECC computations.
 */
//#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() and 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 reasonable 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.
 *
 * Requires: MBEDTLS_GCM_C or MBEDTLS_CCM_C or MBEDTLS_CHACHAPOLY_C
 *
 * 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 family 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 example 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 be 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.
 *
 * When this option is disabled, the PSA API exposes the cryptographic
 * mechanisms that can be implemented on top of the `mbedtls_xxx` API
 * configured with `MBEDTLS_XXX` symbols.
 *
 * When this option is enabled, the PSA API exposes the cryptographic
 * mechanisms requested by the `PSA_WANT_XXX` symbols defined in
 * include/psa/crypto_config.h. The corresponding `MBEDTLS_XXX` settings are
 * automatically enabled if required (i.e. if no PSA driver provides the
 * mechanism). You may still freely enable additional `MBEDTLS_XXX` symbols
 * in config.h.
 *
 * If the symbol #MBEDTLS_PSA_CRYPTO_CONFIG_FILE is defined, it specifies
 * an alternative header to include instead of 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 or x86-32.
 *
 * \note AESNI is only supported with certain compilers and target options:
 * - Visual Studio 2013: supported.
 * - GCC, x86-64, target not explicitly supporting AESNI:
 *   requires MBEDTLS_HAVE_ASM.
 * - GCC, x86-32, target not explicitly supporting AESNI:
 *   not supported.
 * - GCC, x86-64 or x86-32, target supporting AESNI: supported.
 *   For this assembly-less implementation, you must currently compile
 *   `library/aesni.c` and `library/aes.c` with machine options to enable
 *   SSE2 and AESNI instructions: `gcc -msse2 -maes -mpclmul` or
 *   `clang -maes -mpclmul`.
 * - Non-x86 targets: this option is silently ignored.
 * - Other compilers: this option is silently ignored.
 *
 * \note
 * Above, "GCC" includes compatible compilers such as Clang.
 * The limitations on target support are likely to be relaxed in the future.
 *
 * Module:  library/aesni.c
 * Caller:  library/aes.c
 *
 * Requires: MBEDTLS_HAVE_ASM (on some platforms, see note)
 *
 * This modules adds support for the AES-NI instructions on x86.
 */
#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 avoiding 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/3DES are considered weak ciphers and their 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 generator.
 */
#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://mbed-tls.readthedocs.io/en/latest/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 (asymmetric) 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 (asymmetric) 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 (asymmetric) 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 &&
 *           ( MBEDTLS_GCM_C || MBEDTLS_CCM_C || MBEDTLS_CHACHAPOLY_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://mbed-tls.readthedocs.io/en/latest/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 The timing module will include time.h on suitable platforms
 *       regardless of the setting of MBEDTLS_HAVE_TIME, unless
 *       MBEDTLS_TIMING_ALT is used. See timing.c for more information.
 *
 * \note See also our Knowledge Base article about porting to a new
 * environment:
 * https://mbed-tls.readthedocs.io/en/latest/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: General configuration options
 *
 * This section contains Mbed TLS build settings that are not associated
 * with a particular module.
 *
 * \{
 */

/**
 * \def MBEDTLS_CONFIG_FILE
 *
 * If defined, this is a header which will be included instead of
 * `"mbedtls/config.h"`.
 * This header file specifies the compile-time configuration of Mbed TLS.
 * Unlike other configuration options, this one must be defined on the
 * compiler command line: a definition in `config.h` would have no effect.
 *
 * This macro is expanded after an <tt>\#include</tt> directive. This is a popular but
 * non-standard feature of the C language, so this feature is only available
 * with compilers that perform macro expansion on an <tt>\#include</tt> line.
 *
 * The value of this symbol is typically a path in double quotes, either
 * absolute or relative to a directory on the include search path.
 */
//#define MBEDTLS_CONFIG_FILE "mbedtls/config.h"

/**
 * \def MBEDTLS_USER_CONFIG_FILE
 *
 * If defined, this is a header which will be included after
 * `"mbedtls/config.h"` or #MBEDTLS_CONFIG_FILE.
 * This allows you to modify the default configuration, including the ability
 * to undefine options that are enabled by default.
 *
 * This macro is expanded after an <tt>\#include</tt> directive. This is a popular but
 * non-standard feature of the C language, so this feature is only available
 * with compilers that perform macro expansion on an <tt>\#include</tt> line.
 *
 * The value of this symbol is typically a path in double quotes, either
 * absolute or relative to a directory on the include search path.
 */
//#define MBEDTLS_USER_CONFIG_FILE "/dev/null"

/**
 * \def MBEDTLS_PSA_CRYPTO_CONFIG_FILE
 *
 * If defined, this is a header which will be included instead of
 * `"psa/crypto_config.h"`.
 * This header file specifies which cryptographic mechanisms are available
 * through the PSA API when #MBEDTLS_PSA_CRYPTO_CONFIG is enabled, and
 * is not used when #MBEDTLS_PSA_CRYPTO_CONFIG is disabled.
 *
 * This macro is expanded after an <tt>\#include</tt> directive. This is a popular but
 * non-standard feature of the C language, so this feature is only available
 * with compilers that perform macro expansion on an <tt>\#include</tt> line.
 *
 * The value of this symbol is typically a path in double quotes, either
 * absolute or relative to a directory on the include search path.
 */
//#define MBEDTLS_PSA_CRYPTO_CONFIG_FILE "psa/crypto_config.h"

/**
 * \def MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE
 *
 * If defined, this is a header which will be included after
 * `"psa/crypto_config.h"` or #MBEDTLS_PSA_CRYPTO_CONFIG_FILE.
 * This allows you to modify the default configuration, including the ability
 * to undefine options that are enabled by default.
 *
 * This macro is expanded after an <tt>\#include</tt> directive. This is a popular but
 * non-standard feature of the C language, so this feature is only available
 * with compilers that perform macro expansion on an <tt>\#include</tt> line.
 *
 * The value of this symbol is typically a path in double quotes, either
 * absolute or relative to a directory on the include search path.
 */
//#define MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE "/dev/null"

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

/**
 * \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.
 * \{
 */
/* The Doxygen documentation here is used when a user comments out a
 * setting and runs doxygen themselves. On the other hand, when we typeset
 * the full documentation including disabled settings, the documentation
 * in specific modules' header files is used if present. When editing this
 * file, make sure that each option is documented in exactly one place,
 * plus optionally a same-line Doxygen comment here if there is a Doxygen
 * comment in the specific module. */

/* MPI / BIGNUM options */
//#define MBEDTLS_MPI_WINDOW_SIZE            2 /**< 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. */

/* An overview of how the value of mbedtls_calloc is determined:
 *
 * if !MBEDTLS_PLATFORM_MEMORY
 *     mbedtls_calloc = calloc
 * if MBEDTLS_PLATFORM_MEMORY
 *     if (MBEDTLS_PLATFORM_CALLOC_MACRO && MBEDTLS_PLATFORM_FREE_MACRO):
 *         mbedtls_calloc = MBEDTLS_PLATFORM_CALLOC_MACRO
 *     if !(MBEDTLS_PLATFORM_CALLOC_MACRO && MBEDTLS_PLATFORM_FREE_MACRO):
 *         Dynamic setup via mbedtls_platform_set_calloc_free is now possible with a default value MBEDTLS_PLATFORM_STD_CALLOC.
 *         How is MBEDTLS_PLATFORM_STD_CALLOC handled?
 *         if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS:
 *             MBEDTLS_PLATFORM_STD_CALLOC is not set to anything;
 *             MBEDTLS_PLATFORM_STD_MEM_HDR can be included if present;
 *         if !MBEDTLS_PLATFORM_NO_STD_FUNCTIONS:
 *             if MBEDTLS_PLATFORM_STD_CALLOC is present:
 *                 User-defined MBEDTLS_PLATFORM_STD_CALLOC is respected;
 *             if !MBEDTLS_PLATFORM_STD_CALLOC:
 *                 MBEDTLS_PLATFORM_STD_CALLOC = calloc
 *
 *         At this point the presence of MBEDTLS_PLATFORM_STD_CALLOC is checked.
 *         if !MBEDTLS_PLATFORM_STD_CALLOC
 *             MBEDTLS_PLATFORM_STD_CALLOC = uninitialized_calloc
 *
 *         mbedtls_calloc = MBEDTLS_PLATFORM_STD_CALLOC.
 *
 * Defining MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_STD_CALLOC at the same time is not possible.
 * MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO must both be defined or undefined at the same time.
 * MBEDTLS_PLATFORM_STD_CALLOC and MBEDTLS_PLATFORM_STD_FREE do not have to be defined at the same time, as, if they are used, dynamic setup of these functions is possible. See the tree above to see how are they handled in all cases.
 */
/** \def MBEDTLS_PLATFORM_STD_CALLOC
 *
 * Default allocator to use, can be undefined. See the description above for details.
 * It must initialize the allocated buffer memory to zeroes.
 * The size of the buffer is the product of the two parameters.
 * The calloc function returns either a null pointer or a pointer to the allocated space.
 * If the product is 0, the function may either return NULL or a valid pointer to an array of size 0 which is a valid input to the deallocation function.
 * The corresponding deallocation function is #MBEDTLS_PLATFORM_STD_FREE.
 */
//#define MBEDTLS_PLATFORM_STD_CALLOC        calloc
/** \def MBEDTLS_PLATFORM_STD_FREE
 *
 * Default free to use, can be undefined.
 * NULL is a valid parameter, and the function must do nothing.
 * A non-null parameter will always be a pointer previously returned by #MBEDTLS_PLATFORM_STD_CALLOC and not yet freed.
 */
//#define MBEDTLS_PLATFORM_STD_FREE            free
//#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 the following 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. See MBEDTLS_PLATFORM_STD_CALLOC for requirements. */
//#define MBEDTLS_PLATFORM_FREE_MACRO            free /**< Default free macro to use, can be undefined. See MBEDTLS_PLATFORM_STD_FREE for requirements. */
//#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: Module 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)
#include "mbedtls/config_psa.h"
#endif

#include "mbedtls/check_config.h"

#endif /* MBEDTLS_CONFIG_H */