text: /**
   * \file config.h
   *
   * \brief Configuration options (set of defines)
   *
   *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
   *  SPDX-License-Identifier: Apache-2.0
   *
   *  Licensed under the Apache License, Version 2.0 (the "License"); you may
   *  not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   *
   *  This file is part of mbed TLS (https://tls.mbed.org)
   */
  
  /*
   * This set of compile-time options may be used to enable
   * or disable features selectively, and reduce the global
   * memory footprint.
   */
  #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/timing.c
   *      library/padlock.c
   *      include/mbedtls/bn_mul.h
   *
   * Comment to disable the use of assembly code.
   */
  // disable ASM on generic armeabi builds
  #if !defined(__arm__) || defined(__ARM_ARCH_7A__)
  #   define MBEDTLS_HAVE_ASM
  #endif
  
  /**
   * \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
   *
   * Comment if your system does not support time functions
   */
  #define MBEDTLS_HAVE_TIME
  
  /**
   * \def MBEDTLS_HAVE_TIME_DATE
   *
   * System has time.h and time(), gmtime() and the clock is correct.
   * The time needs to be correct (not necesarily 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.
   */
  #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_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!
   *
   * Uncomment a macro to enable alternate implementation of specific base
   * platform function
   */
  //#define MBEDTLS_PLATFORM_EXIT_ALT
  //#define MBEDTLS_PLATFORM_FPRINTF_ALT
  //#define MBEDTLS_PLATFORM_PRINTF_ALT
  //#define MBEDTLS_PLATFORM_SNPRINTF_ALT
  
  /**
   * \def MBEDTLS_DEPRECATED_WARNING
   *
   * Mark deprecated functions so that they generate a warning if used.
   * Functions 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 these functions.
   *
   * 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.
   */
  //#define MBEDTLS_DEPRECATED_WARNING
  
  /**
   * \def MBEDTLS_DEPRECATED_REMOVED
   *
   * Remove deprecated functions so that they generate an error if used.
   * Functions 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 these functions.
   *
   * Uncomment to get errors on using deprecated functions.
   */
  //#define MBEDTLS_DEPRECATED_REMOVED
  
  /* \} 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__MODULE_NAME__ALT
   *
   * Uncomment a macro to let mbed TLS use your alternate core implementation of
   * a symmetric crypto 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.
   */
  //#define MBEDTLS_AES_ALT
  //#define MBEDTLS_ARC4_ALT
  //#define MBEDTLS_BLOWFISH_ALT
  //#define MBEDTLS_CAMELLIA_ALT
  //#define MBEDTLS_DES_ALT
  //#define MBEDTLS_XTEA_ALT
  //#define MBEDTLS_MD2_ALT
  //#define MBEDTLS_MD4_ALT
  //#define MBEDTLS_MD5_ALT
  //#define MBEDTLS_RIPEMD160_ALT
  //#define MBEDTLS_SHA1_ALT
  //#define MBEDTLS_SHA256_ALT
  //#define MBEDTLS_SHA512_ALT
  
  /**
   * \def 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: if you use the AES_xxx_ALT macros, then is 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.
   */
  //#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
  
  /**
   * \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
   *
   * Store the AES tables in ROM.
   *
   * Uncomment this macro to store the AES tables in ROM.
   */
  //#define MBEDTLS_AES_ROM_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_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_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_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_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
   */
  //#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_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
   */
  #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
  #define MBEDTLS_ECP_DP_CURVE25519_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_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
   *
   * 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
   */
  #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
   */
  #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_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_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_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
  
  #if defined(IW_SDK) || defined(NN_NINTENDO_SDK)
  #	define MBEDTLS_NO_PLATFORM_ENTROPY 1
  #endif
  
  //#if (defined(_MSC_VER) && defined(WINAPI_FAMILY)) || defined(__cplusplus_winrt)
  #	if (defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0603)) || defined(__cplusplus_winrt)
  #   include <winapifamily.h>
  #   if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  #       define MBEDTLS_NO_PLATFORM_ENTROPY 1
  #   endif
  #endif
  
  /**
   * \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_MEMORY_DEBUG
   *
   * Enable debugging of buffer allocator memory issues. Automatically prints
   * (to stderr) all (fatal) messages on memory allocation issues. Enables
   * function for 'debug output' of allocated memory.
   *
   * Requires: MBEDTLS_MEMORY_BUFFER_ALLOC_C
   *
   * Uncomment this macro to let the buffer allocator print out error messages.
   */
  //#define MBEDTLS_MEMORY_DEBUG
  
  /**
   * \def MBEDTLS_MEMORY_BACKTRACE
   *
   * Include backtrace information with each allocated block.
   *
   * Requires: MBEDTLS_MEMORY_BUFFER_ALLOC_C
   *           GLIBC-compatible backtrace() an backtrace_symbols() support
   *
   * Uncomment this macro to include backtrace information
   */
  //#define MBEDTLS_MEMORY_BACKTRACE
  
  /**
   * \def MBEDTLS_PK_RSA_ALT_SUPPORT
   *
   * Support external private RSA keys (eg from a HSM) in the PK layer.
   *
   * Comment this macro to disable support for external private RSA keys.
   */
  #define MBEDTLS_PK_RSA_ALT_SUPPORT
  
  /**
   * \def MBEDTLS_PKCS1_V15
   *
   * Enable support for PKCS#1 v1.5 encoding.
   *
   * Requires: MBEDTLS_RSA_C
   *
   * This enables support for PKCS#1 v1.5 operations.
   */
  #define MBEDTLS_PKCS1_V15
  
  /**
   * \def MBEDTLS_PKCS1_V21
   *
   * Enable support for PKCS#1 v2.1 encoding.
   *
   * Requires: MBEDTLS_MD_C, MBEDTLS_RSA_C
   *
   * This enables support for RSAES-OAEP and RSASSA-PSS operations.
   */
  #define MBEDTLS_PKCS1_V21
  
  /**
   * \def MBEDTLS_RSA_NO_CRT
   *
   * Do not use the Chinese Remainder Theorem for the RSA private operation.
   *
   * Uncomment this macro to disable the use of CRT in RSA.
   *
   */
  //#define MBEDTLS_RSA_NO_CRT
  
  /**
   * \def MBEDTLS_SELF_TEST
   *
   * Enable the checkup functions (*_self_test).
   */
  //#define MBEDTLS_SELF_TEST
  
  /**
   * \def MBEDTLS_SHA256_SMALLER
   *
   * Enable an implementation of SHA-256 that has lower ROM footprint but also
   * lower performance.
   *
   * The default implementation is meant to be a reasonnable compromise between
   * performance and size. This version optimizes more aggressively for size at
   * the expense of performance. Eg on Cortex-M4 it reduces the size of
   * mbedtls_sha256_process() from ~2KB to ~0.5KB for a performance hit of about
   * 30%.
   *
   * Uncomment to enable the smaller implementation of SHA256.
   */
  //#define MBEDTLS_SHA256_SMALLER
  
  /**
   * \def MBEDTLS_SSL_AEAD_RANDOM_IV
   *
   * Generate a random IV rather than using the record sequence number as a
   * nonce for ciphersuites using and AEAD algorithm (GCM or CCM).
   *
   * Using the sequence number is generally recommended.
   *
   * Uncomment this macro to always use random IVs with AEAD ciphersuites.
   */
  //#define MBEDTLS_SSL_AEAD_RANDOM_IV
  
  /**
   * \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_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 Extended Master Secret, aka Session Hash
   * (draft-ietf-tls-session-hash-02).
   *
   * This was introduced as "the proper fix" to the Triple Handshake familiy of
   * attacks, but it is recommended to always use it (even if you disable
   * renegotiation), since it actually fixes a more fundamental issue in the
   * original SSL/TLS design, and has implications beyond Triple Handshake.
   *
   * Requires: MBEDTLS_SSL_PROTO_TLS1    or
   *           MBEDTLS_SSL_PROTO_TLS1_1  or
   *           MBEDTLS_SSL_PROTO_TLS1_2
   *
   * Comment this macro to disable support for Extended Master Secret.
   */
  #define MBEDTLS_SSL_EXTENDED_MASTER_SECRET
  
  /**
   * \def MBEDTLS_SSL_FALLBACK_SCSV
   *
   * Enable support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv-00).
   *
   * 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_HW_RECORD_ACCEL
   *
   * Enable hooking functions in SSL module for hardware acceleration of
   * individual records.
   *
   * 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
   *
   * Disable 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.
   */
  #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).
   *
   * 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
   *
   * 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_DTLS
   *
   * Enable support for DTLS (all available versions).
   *
   * Enable this and MBEDTLS_SSL_PROTO_TLS1_1 to enable DTLS 1.0,
   * and/or this and MBEDTLS_SSL_PROTO_TLS1_2 to enable DTLS 1.2.
   *
   * Requires: MBEDTLS_SSL_PROTO_TLS1_1
   *        or MBEDTLS_SSL_PROTO_TLS1_2
   *
   * Comment this macro to disable support for DTLS
   */
  #define MBEDTLS_SSL_PROTO_DTLS
  
  /**
   * \def MBEDTLS_SSL_ALPN
   *
   * Enable support for RFC 7301 Application Layer Protocol Negotiation.
   *
   * Comment this macro to disable support for ALPN.
   */
  #define MBEDTLS_SSL_ALPN
  
  /**
   * \def MBEDTLS_SSL_DTLS_ANTI_REPLAY
   *
   * Enable support for the anti-replay mechanism in DTLS.
   *
   * Requires: MBEDTLS_SSL_TLS_C
   *           MBEDTLS_SSL_PROTO_DTLS
   *
   * \warning Disabling this is often a security risk!
   * See mbedtls_ssl_conf_dtls_anti_replay() for details.
   *
   * Comment this to disable anti-replay in DTLS.
   */
  #define MBEDTLS_SSL_DTLS_ANTI_REPLAY
  
  /**
   * \def MBEDTLS_SSL_DTLS_HELLO_VERIFY
   *
   * Enable support for HelloVerifyRequest on DTLS servers.
   *
   * This feature is highly recommended to prevent DTLS servers being used as
   * amplifiers in DoS attacks against other hosts. It should always be enabled
   * unless you know for sure amplification cannot be a problem in the
   * environment in which your server operates.
   *
   * \warning Disabling this can ba a security risk! (see above)
   *
   * Requires: MBEDTLS_SSL_PROTO_DTLS
   *
   * Comment this to disable support for HelloVerifyRequest.
   */
  #define MBEDTLS_SSL_DTLS_HELLO_VERIFY
  
  /**
   * \def MBEDTLS_SSL_DTLS_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 (maintainance 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_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_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_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.
   *
   * Uncomment to prevent an error.
   */
  //#define MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
  
  /**
   * \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 a applicable to your use case.
   *
   * \note Currently compression can't be used with DTLS.
   *
   * Used in: library/ssl_tls.c
   *          library/ssl_cli.c
   *          library/ssl_srv.c
   *
   * This feature requires zlib library and headers to be present.
   *
   * Uncomment to enable use of ZLIB
   */
  //#define MBEDTLS_ZLIB_SUPPORT
  /* \} name SECTION: mbed TLS feature support */
  
  /**
   * \name SECTION: mbed TLS modules
   *
   * This section enables or disables entire modules in mbed TLS
   * \{
   */
  
  /**
   * \def MBEDTLS_AESNI_C
   *
   * Enable AES-NI support on x86-64.
   *
   * Module:  library/aesni.c
   * Caller:  library/aes.c
   *
   * Requires: MBEDTLS_HAVE_ASM
   *
   * This modules adds support for the AES-NI instructions on x86-64
   */
  #if defined(MBEDTLS_HAVE_ASM)
  #   define MBEDTLS_AESNI_C
  #endif
  
  /**
   * \def MBEDTLS_AES_C
   *
   * Enable the AES block cipher.
   *
   * Module:  library/aes.c
   * Caller:  library/ssl_tls.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/ssl_tls.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
   */
  #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/mbedtls_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/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/ssl_tls.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_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_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_CTR_DRBG_C
   *
   * Enable the CTR_DRBG AES-256-based random generator.
   *
   * Module:  library/ctr_drbg.c
   * Caller:
   *
   * Requires: MBEDTLS_AES_C
   *
   * This module provides the CTR_DRBG AES-256 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/ssl_tls.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.
   */
  #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
   */
  #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
   */
  #define MBEDTLS_ECDSA_C
  
  /**
   * \def MBEDTLS_ECP_C
   *
   * Enable the elliptic curve over GF(p) library.
   *
   * Module:  library/ecp.c
   * Caller:  library/ecdh.c
   *          library/ecdsa.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) for AES.
   *
   * Module:  library/gcm.c
   *
   * Requires: MBEDTLS_AES_C or MBEDTLS_CAMELLIA_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_HMAC_DRBG_C
   *
   * Enable the HMAC_DRBG random generator.
   *
   * Module:  library/hmac_drbg.c
   * Caller:
   *
   * Requires: MBEDTLS_MD_C
   *
   * Uncomment to enable the HMAC_DRBG random number geerator.
   */
  #define MBEDTLS_HMAC_DRBG_C
  
  /**
   * \def MBEDTLS_MD_C
   *
   * Enable the generic message digest layer.
   *
   * Module:  library/mbedtls_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/mbedtls_md2.c
   * Caller:
   *
   * Uncomment to enable support for (rare) MD2-signed X.509 certs.
   */
  //#define MBEDTLS_MD2_C
  
  /**
   * \def MBEDTLS_MD4_C
   *
   * Enable the MD4 hash algorithm.
   *
   * Module:  library/mbedtls_md4.c
   * Caller:
   *
   * Uncomment to enable support for (rare) MD4-signed X.509 certs.
   */
  //#define MBEDTLS_MD4_C
  
  /**
   * \def MBEDTLS_MD5_C
   *
   * Enable the MD5 hash algorithm.
   *
   * Module:  library/mbedtls_md5.c
   * Caller:  library/mbedtls_md.c
   *          library/pem.c
   *          library/ssl_tls.c
   *
   * This module is required for SSL/TLS and X.509.
   * PEM_PARSE uses MD5 for decrypting encrypted keys.
   */
  #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/IP networking routines.
   *
   * Module:  library/net.c
   *
   * This module provides TCP/IP 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/mbedtls_x509_crl.c
   *          library/mbedtls_x509_crt.c
   *          library/mbedtls_x509_csr.c
   *          library/x509write_crt.c
   *          library/mbedtls_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.
   */
  #if defined(MBEDTLS_HAVE_ASM)
  #   define MBEDTLS_PADLOCK_C
  #endif
  
  /**
   * \def MBEDTLS_PEM_PARSE_C
   *
   * Enable PEM decoding / parsing.
   *
   * Module:  library/pem.c
   * Caller:  library/dhm.c
   *          library/pkparse.c
   *          library/mbedtls_x509_crl.c
   *          library/mbedtls_x509_crt.c
   *          library/mbedtls_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/mbedtls_x509write_csr.c
   *
   * Requires: MBEDTLS_BASE64_C
   *
   * This modules adds support for encoding / writing PEM files.
   */
  #define MBEDTLS_PEM_WRITE_C
  
  /**
   * \def MBEDTLS_PK_C
   *
   * Enable the generic public (asymetric) key layer.
   *
   * Module:  library/pk.c
   * Caller:  library/ssl_tls.c
   *          library/ssl_cli.c
   *          library/ssl_srv.c
   *
   * Requires: MBEDTLS_RSA_C or MBEDTLS_ECP_C
   *
   * Uncomment to enable generic public key wrappers.
   */
  #define MBEDTLS_PK_C
  
  /**
   * \def MBEDTLS_PK_PARSE_C
   *
   * Enable the generic public (asymetric) key parser.
   *
   * Module:  library/pkparse.c
   * Caller:  library/mbedtls_x509_crt.c
   *          library/mbedtls_x509_csr.c
   *
   * Requires: MBEDTLS_PK_C
   *
   * Uncomment to enable generic public key parse functions.
   */
  #define MBEDTLS_PK_PARSE_C
  
  /**
   * \def MBEDTLS_PK_WRITE_C
   *
   * Enable the generic public (asymetric) key writer.
   *
   * Module:  library/pkwrite.c
   * Caller:  library/x509write.c
   *
   * Requires: MBEDTLS_PK_C
   *
   * Uncomment to enable generic public key write functions.
   */
  #define MBEDTLS_PK_WRITE_C
  
  /**
   * \def MBEDTLS_PKCS5_C
   *
   * Enable PKCS#5 functions.
   *
   * Module:  library/pkcs5.c
   *
   * Requires: MBEDTLS_MD_C
   *
   * This module adds support for the PKCS#5 functions.
   */
  #define MBEDTLS_PKCS5_C
  
  /**
   * \def MBEDTLS_PKCS11_C
   *
   * Enable wrapper for PKCS#11 smartcard support.
   *
   * 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_RIPEMD160_C
   *
   * Enable the RIPEMD-160 hash algorithm.
   *
   * Module:  library/mbedtls_ripemd160.c
   * Caller:  library/mbedtls_md.c
   *
   */
  #define MBEDTLS_RIPEMD160_C
  
  /**
   * \def MBEDTLS_RSA_C
   *
   * Enable the RSA public-key cryptosystem.
   *
   * Module:  library/rsa.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/mbedtls_sha1.c
   * Caller:  library/mbedtls_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 and SHA1-signed certificates.
   */
  #define MBEDTLS_SHA1_C
  
  /**
   * \def MBEDTLS_SHA256_C
   *
   * Enable the SHA-224 and SHA-256 cryptographic hash algorithms.
   *
   * Module:  library/mbedtls_sha256.c
   * Caller:  library/entropy.c
   *          library/mbedtls_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/mbedtls_sha512.c
   * Caller:  library/entropy.c
   *          library/mbedtls_md.c
   *          library/ssl_cli.c
   *          library/ssl_srv.c
   *
   * This module adds support for SHA-384 and SHA-512.
   */
  #define MBEDTLS_SHA512_C
  
  /**
   * \def MBEDTLS_SSL_CACHE_C
   *
   * Enable simple SSL cache implementation.
   *
   * Module:  library/ssl_cache.c
   * Caller:
   *
   * Requires: MBEDTLS_SSL_CACHE_C
   */
  #define MBEDTLS_SSL_CACHE_C
  
  /**
   * \def MBEDTLS_SSL_COOKIE_C
   *
   * Enable basic implementation of DTLS cookies for hello verification.
   *
   * Module:  library/ssl_cookie.c
   * Caller:
   */
  #define MBEDTLS_SSL_COOKIE_C
  
  /**
   * \def MBEDTLS_SSL_TICKET_C
   *
   * Enable an implementation of TLS server-side callbacks for session tickets.
   *
   * Module:  library/ssl_ticket.c
   * Caller:
   *
   * Requires: MBEDTLS_CIPHER_C
   */
  #define MBEDTLS_SSL_TICKET_C
  
  /**
   * \def MBEDTLS_SSL_CLI_C
   *
   * Enable the SSL/TLS client code.
   *
   * Module:  library/ssl_cli.c
   * Caller:
   *
   * Requires: MBEDTLS_SSL_TLS_C
   *
   * This module is required for SSL/TLS client support.
   */
  #define MBEDTLS_SSL_CLI_C
  
  /**
   * \def MBEDTLS_SSL_SRV_C
   *
   * Enable the SSL/TLS server code.
   *
   * Module:  library/ssl_srv.c
   * Caller:
   *
   * Requires: MBEDTLS_SSL_TLS_C
   *
   * This module is required for SSL/TLS server support.
   */
  // #define MBEDTLS_SSL_SRV_C
  
  /**
   * \def MBEDTLS_SSL_TLS_C
   *
   * Enable the generic SSL/TLS code.
   *
   * Module:  library/ssl_tls.c
   * Caller:  library/ssl_cli.c
   *          library/ssl_srv.c
   *
   * Requires: MBEDTLS_CIPHER_C, MBEDTLS_MD_C
   *           and at least one of the MBEDTLS_SSL_PROTO_XXX defines
   *
   * This module is required for SSL/TLS.
   */
  #define MBEDTLS_SSL_TLS_C
  
  /**
   * \def MBEDTLS_THREADING_C
   *
   * Enable the threading abstraction layer.
   * By default mbed TLS assumes it is used in a non-threaded environment or that
   * contexts are not shared between threads. If you do intend to use contexts
   * between threads, you will need to enable this layer to prevent race
   * conditions.
   *
   * 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 portable timing interface.
   *
   * 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/mbedtls_x509_crl.c
   *          library/mbedtls_x509_crt.c
   *          library/mbedtls_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/mbedtls_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/mbedtls_x509_crl.c
   * Caller:  library/mbedtls_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/mbedtls_x509_csr.c
   * Caller:  library/x509_crt_write.c
   *
   * Requires: MBEDTLS_X509_USE_C
   *
   * This module is used for reading X.509 certificate request.
   */
  #define MBEDTLS_X509_CSR_PARSE_C
  
  /**
   * \def MBEDTLS_X509_CREATE_C
   *
   * Enable X.509 core for creating certificates.
   *
   * Module:  library/x509_create.c
   *
   * Requires: MBEDTLS_BIGNUM_C, MBEDTLS_OID_C, MBEDTLS_PK_WRITE_C
   *
   * This module is the basis for creating X.509 certificates and CSRs.
   */
  #define MBEDTLS_X509_CREATE_C
  
  /**
   * \def MBEDTLS_X509_CRT_WRITE_C
   *
   * Enable creating X.509 certificates.
   *
   * Module:  library/x509_crt_write.c
   *
   * Requires: MBEDTLS_X509_CREATE_C
   *
   * This module is required for X.509 certificate creation.
   */
  #define MBEDTLS_X509_CRT_WRITE_C
  
  /**
   * \def MBEDTLS_X509_CSR_WRITE_C
   *
   * Enable creating X.509 Certificate Signing Requests (CSR).
   *
   * Module:  library/x509_csr_write.c
   *
   * Requires: MBEDTLS_X509_CREATE_C
   *
   * This module is required for X.509 certificate request writing.
   */
  #define MBEDTLS_X509_CSR_WRITE_C
  
  /**
   * \def MBEDTLS_XTEA_C
   *
   * Enable the XTEA block cipher.
   *
   * Module:  library/xtea.c
   * Caller:
   */
  #define MBEDTLS_XTEA_C
  
  /* \} name SECTION: mbed TLS modules */
  
  /**
   * \name SECTION: Module configuration options
   *
   * This section allows for the setting of module specific sizes and
   * configuration options. The default values are already present in the
   * relevant header files and should suffice for the regular use cases.
   *
   * Our advice is to enable options and change their values here
   * only if you have a good reason and know the consequences.
   *
   * Please check the respective header file for documentation on these
   * parameters (to prevent duplicate documentation).
   * \{
   */
  
  /* MPI / BIGNUM options */
  //#define MBEDTLS_MPI_WINDOW_SIZE            6 /**< Maximum windows 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 */
  //#define MBEDTLS_ECP_WINDOW_SIZE            6 /**< 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 */
  
  /* Memory buffer allocator options */
  //#define MBEDTLS_MEMORY_ALIGN_MULTIPLE      4 /**< Align on multiples of this value */
  
  /* Platform options */
  //#define MBEDTLS_PLATFORM_STD_MEM_HDR   <stdlib.h> /**< Header to include if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS is defined. Don't define if no header is needed. */
  //#define MBEDTLS_PLATFORM_STD_CALLOC        calloc /**< Default allocator to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_FREE            free /**< Default free to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_EXIT            exit /**< Default exit to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_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 correclty zero-terminate the buffer! */
  //#define MBEDTLS_PLATFORM_STD_SNPRINTF    snprintf /**< Default snprintf to use, can be undefined */
  
  /* To Use Function Macros MBEDTLS_PLATFORM_C must be enabled */
  /* MBEDTLS_PLATFORM_XXX_MACRO and MBEDTLS_PLATFORM_XXX_ALT cannot both be defined */
  //#define MBEDTLS_PLATFORM_CALLOC_MACRO        calloc /**< Default allocator macro to use, can be undefined */
  //#define MBEDTLS_PLATFORM_FREE_MACRO            free /**< Default free macro to use, can be undefined */
  //#define MBEDTLS_PLATFORM_EXIT_MACRO            exit /**< Default exit macro to use, can be undefined */
  //#define MBEDTLS_PLATFORM_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 correclty zero-terminate the buffer! */
  //#define MBEDTLS_PLATFORM_SNPRINTF_MACRO    snprintf /**< Default snprintf macro to use, can be undefined */
  
  /* 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 */
  //#define MBEDTLS_SSL_MAX_CONTENT_LEN             16384 /**< Maxium fragment length in bytes, determines the size of each of the two internal I/O buffers */
  //#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 */
  
  /**
   * 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. */
  
  /* \} name SECTION: Module configuration options */
  
  #if defined(TARGET_LIKE_MBED)
  #include "mbedtls/target_config.h"
  #endif
  
  /*
   * Allow user to override any previous default.
   *
   * Use two macro names for that, as:
   * - with yotta the prefix YOTTA_CFG_ is forced
   * - without yotta is looks weird to have a YOTTA prefix.
   */
  #if defined(YOTTA_CFG_MBEDTLS_USER_CONFIG_FILE)
  #include YOTTA_CFG_MBEDTLS_USER_CONFIG_FILE
  #elif defined(MBEDTLS_USER_CONFIG_FILE)
  #include MBEDTLS_USER_CONFIG_FILE
  #endif
  
  #include "check_config.h"
  
  #endif /* MBEDTLS_CONFIG_H */
  