text: /**
   * \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.
   */
  
  #ifndef MBEDTLS_CONFIG_H
  #define MBEDTLS_CONFIG_H
  
  #if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
  #define _CRT_SECURE_NO_DEPRECATE 1
  #endif
  
  /* ======================== System support ======================== */
  
  #define MBEDTLS_HAVE_ASM
  //#define MBEDTLS_NO_UDBL_DIVISION
  //#define MBEDTLS_NO_64BIT_MULTIPLICATION
  //#define MBEDTLS_HAVE_SSE2
  #define MBEDTLS_HAVE_TIME
  #define MBEDTLS_HAVE_TIME_DATE
  //#define MBEDTLS_PLATFORM_MEMORY
  //#define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
  //#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_NV_SEED_ALT
  //#define MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT
  //#define MBEDTLS_DEPRECATED_WARNING
  //#define MBEDTLS_DEPRECATED_REMOVED
  //#define MBEDTLS_CHECK_PARAMS
  
  /* ==================== mbed TLS feature support ==================== */
  
  //#define MBEDTLS_TIMING_ALT
  //#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
  //#define MBEDTLS_ECP_ALT
  //#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
  //#define MBEDTLS_ECP_INTERNAL_ALT
  //#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
  //#define MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT
  //#define MBEDTLS_ECP_RANDOMIZE_MXZ_ALT
  //#define MBEDTLS_ECP_NORMALIZE_MXZ_ALT
  //#define MBEDTLS_TEST_NULL_ENTROPY
  //#define MBEDTLS_ENTROPY_HARDWARE_ALT
  //#define MBEDTLS_AES_ROM_TABLES
  //#define MBEDTLS_AES_FEWER_TABLES
  //#define MBEDTLS_CAMELLIA_SMALL_MEMORY
  #define MBEDTLS_CIPHER_MODE_CBC
  #define MBEDTLS_CIPHER_MODE_CFB
  #define MBEDTLS_CIPHER_MODE_CTR
  #define MBEDTLS_CIPHER_MODE_OFB
  #define MBEDTLS_CIPHER_MODE_XTS
  //#define MBEDTLS_CIPHER_NULL_CIPHER
  #define MBEDTLS_CIPHER_PADDING_PKCS7
  #define MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS
  #define MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN
  #define MBEDTLS_CIPHER_PADDING_ZEROS
  //#define MBEDTLS_ENABLE_WEAK_CIPHERSUITES
  #define MBEDTLS_REMOVE_ARC4_CIPHERSUITES
  #define MBEDTLS_REMOVE_3DES_CIPHERSUITES
  #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
  #define MBEDTLS_ECP_DP_CURVE448_ENABLED
  #define MBEDTLS_ECP_NIST_OPTIM
  //#define MBEDTLS_ECP_RESTARTABLE
  #define MBEDTLS_ECDSA_DETERMINISTIC
  #define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_RSA_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED
  #define MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED
  //#define MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED
  #define MBEDTLS_PK_PARSE_EC_EXTENDED
  #define MBEDTLS_ERROR_STRERROR_DUMMY
  #define MBEDTLS_GENPRIME
  #define MBEDTLS_FS_IO
  //#define MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
  //#define MBEDTLS_NO_PLATFORM_ENTROPY
  //#define MBEDTLS_ENTROPY_FORCE_SHA256
  //#define MBEDTLS_ENTROPY_NV_SEED
  //#define MBEDTLS_MEMORY_DEBUG
  //#define MBEDTLS_MEMORY_BACKTRACE
  #define MBEDTLS_PK_RSA_ALT_SUPPORT
  #define MBEDTLS_PKCS1_V15
  #define MBEDTLS_PKCS1_V21
  //#define MBEDTLS_RSA_NO_CRT
  #define MBEDTLS_SELF_TEST
  //#define MBEDTLS_SHA256_SMALLER
  #define MBEDTLS_SSL_ALL_ALERT_MESSAGES
  //#define MBEDTLS_SSL_ASYNC_PRIVATE
  //#define MBEDTLS_SSL_DEBUG_ALL
  #define MBEDTLS_SSL_ENCRYPT_THEN_MAC
  #define MBEDTLS_SSL_EXTENDED_MASTER_SECRET
  #define MBEDTLS_SSL_FALLBACK_SCSV
  //#define MBEDTLS_SSL_HW_RECORD_ACCEL
  #define MBEDTLS_SSL_CBC_RECORD_SPLITTING
  #define MBEDTLS_SSL_RENEGOTIATION
  //#define MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO
  //#define MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE
  #define MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
  //#define MBEDTLS_SSL_PROTO_SSL3
  #define MBEDTLS_SSL_PROTO_TLS1
  #define MBEDTLS_SSL_PROTO_TLS1_1
  #define MBEDTLS_SSL_PROTO_TLS1_2
  #define MBEDTLS_SSL_PROTO_DTLS
  #define MBEDTLS_SSL_ALPN
  #define MBEDTLS_SSL_DTLS_ANTI_REPLAY
  #define MBEDTLS_SSL_DTLS_HELLO_VERIFY
  #define MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE
  #define MBEDTLS_SSL_DTLS_BADMAC_LIMIT
  #define MBEDTLS_SSL_SESSION_TICKETS
  #define MBEDTLS_SSL_EXPORT_KEYS
  #define MBEDTLS_SSL_SERVER_NAME_INDICATION
  #define MBEDTLS_SSL_TRUNCATED_HMAC
  //#define MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT
  //#define MBEDTLS_THREADING_ALT
  #define MBEDTLS_THREADING_PTHREAD
  #define MBEDTLS_VERSION_FEATURES
  //#define MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3
  //#define MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
  #define MBEDTLS_X509_CHECK_KEY_USAGE
  #define MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
  #define MBEDTLS_X509_RSASSA_PSS_SUPPORT
  //#define MBEDTLS_ZLIB_SUPPORT
  
  /* ==================== mbed TLS modules ==================== */
  
  #define MBEDTLS_AESNI_C
  #define MBEDTLS_AES_C
  #define MBEDTLS_ARC4_C
  #define MBEDTLS_ASN1_PARSE_C
  #define MBEDTLS_ASN1_WRITE_C
  #define MBEDTLS_BASE64_C
  #define MBEDTLS_BIGNUM_C
  #define MBEDTLS_BLOWFISH_C
  #define MBEDTLS_CAMELLIA_C
  //#define MBEDTLS_ARIA_C
  #define MBEDTLS_CCM_C
  #define MBEDTLS_CERTS_C
  #define MBEDTLS_CHACHA20_C
  #define MBEDTLS_CHACHAPOLY_C
  #define MBEDTLS_CIPHER_C
  //#define MBEDTLS_CMAC_C
  #define MBEDTLS_CTR_DRBG_C
  #define MBEDTLS_DEBUG_C
  #define MBEDTLS_DES_C
  #define MBEDTLS_DHM_C
  #define MBEDTLS_ECDH_C
  #define MBEDTLS_ECDSA_C
  //#define MBEDTLS_ECJPAKE_C
  #define MBEDTLS_ECP_C
  #define MBEDTLS_ENTROPY_C
  #define MBEDTLS_ERROR_C
  #define MBEDTLS_GCM_C
  //#define MBEDTLS_HAVEGE_C
  #define MBEDTLS_HKDF_C
  #define MBEDTLS_HMAC_DRBG_C
  //#define MBEDTLS_NIST_KW_C
  #define MBEDTLS_MD_C
  //#define MBEDTLS_MD2_C
  //#define MBEDTLS_MD4_C
  #define MBEDTLS_MD5_C
  //#define MBEDTLS_MEMORY_BUFFER_ALLOC_C
  #define MBEDTLS_NET_C
  #define MBEDTLS_OID_C
  #define MBEDTLS_PADLOCK_C
  #define MBEDTLS_PEM_PARSE_C
  #define MBEDTLS_PEM_WRITE_C
  #define MBEDTLS_PK_C
  #define MBEDTLS_PK_PARSE_C
  #define MBEDTLS_PK_WRITE_C
  #define MBEDTLS_PKCS5_C
  //#define MBEDTLS_PKCS11_C
  #define MBEDTLS_PKCS12_C
  #define MBEDTLS_PLATFORM_C
  #define MBEDTLS_POLY1305_C
  #define MBEDTLS_RIPEMD160_C
  #define MBEDTLS_RSA_C
  #define MBEDTLS_SHA1_C
  #define MBEDTLS_SHA256_C
  #define MBEDTLS_SHA512_C
  #define MBEDTLS_SSL_CACHE_C
  #define MBEDTLS_SSL_COOKIE_C
  #define MBEDTLS_SSL_TICKET_C
  #define MBEDTLS_SSL_CLI_C
  #define MBEDTLS_SSL_SRV_C
  #define MBEDTLS_SSL_TLS_C
  #define MBEDTLS_THREADING_C
  #define MBEDTLS_TIMING_C
  #define MBEDTLS_VERSION_C
  #define MBEDTLS_X509_USE_C
  #define MBEDTLS_X509_CRT_PARSE_C
  #define MBEDTLS_X509_CRL_PARSE_C
  #define MBEDTLS_X509_CSR_PARSE_C
  #define MBEDTLS_X509_CREATE_C
  #define MBEDTLS_X509_CRT_WRITE_C
  #define MBEDTLS_X509_CSR_WRITE_C
  #define MBEDTLS_XTEA_C
  
  /* ==================== Module configuration options ==================== */
  
  /* 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 */
  //#define MBEDTLS_CTR_DRBG_USE_128_BIT_KEY              /**< Use 128-bit key for CTR_DRBG - may reduce security (see ctr_drbg.h) */
  
  /* 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 */
  //#define MBEDTLS_ENTROPY_MIN_HARDWARE               32 /**< Default minimum number of bytes required for the hardware entropy source mbedtls_hardware_poll() before entropy is released */
  
  /* Memory buffer allocator options */
  //#define MBEDTLS_MEMORY_ALIGN_MULTIPLE      4 /**< Align on multiples of this value */
  
  /* Platform options */
  //#define MBEDTLS_PLATFORM_STD_MEM_HDR   <stdlib.h> /**< Header to include if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS is defined. Don't define if no header is needed. */
  //#define MBEDTLS_PLATFORM_STD_CALLOC        calloc /**< Default allocator to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_FREE            free /**< Default free to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_EXIT            exit /**< Default exit to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_TIME            time /**< Default time to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
  //#define MBEDTLS_PLATFORM_STD_FPRINTF      fprintf /**< Default fprintf to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_PRINTF        printf /**< Default printf to use, can be undefined */
  /* Note: your snprintf must correclty zero-terminate the buffer! */
  //#define MBEDTLS_PLATFORM_STD_SNPRINTF    snprintf /**< Default snprintf to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_EXIT_SUCCESS       0 /**< Default exit value to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_EXIT_FAILURE       1 /**< Default exit value to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_NV_SEED_READ   mbedtls_platform_std_nv_seed_read /**< Default nv_seed_read function to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE  mbedtls_platform_std_nv_seed_write /**< Default nv_seed_write function to use, can be undefined */
  //#define MBEDTLS_PLATFORM_STD_NV_SEED_FILE  "seedfile" /**< Seed file to read/write with default implementation */
  
  /* To Use Function Macros MBEDTLS_PLATFORM_C must be enabled */
  /* MBEDTLS_PLATFORM_XXX_MACRO and MBEDTLS_PLATFORM_XXX_ALT cannot both be defined */
  //#define MBEDTLS_PLATFORM_CALLOC_MACRO        calloc /**< Default allocator macro to use, can be undefined */
  //#define MBEDTLS_PLATFORM_FREE_MACRO            free /**< Default free macro to use, can be undefined */
  //#define MBEDTLS_PLATFORM_EXIT_MACRO            exit /**< Default exit macro to use, can be undefined */
  //#define MBEDTLS_PLATFORM_TIME_MACRO            time /**< Default time macro to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
  //#define MBEDTLS_PLATFORM_TIME_TYPE_MACRO       time_t /**< Default time macro to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
  //#define MBEDTLS_PLATFORM_FPRINTF_MACRO      fprintf /**< Default fprintf macro to use, can be undefined */
  //#define MBEDTLS_PLATFORM_PRINTF_MACRO        printf /**< Default printf macro to use, can be undefined */
  /* Note: your snprintf must correclty zero-terminate the buffer! */
  //#define MBEDTLS_PLATFORM_SNPRINTF_MACRO    snprintf /**< Default snprintf 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 */
  
  
  //#define MBEDTLS_PARAM_FAILED( cond )               assert( cond )
  
  /* 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
  //#define MBEDTLS_SSL_IN_CONTENT_LEN              16384
  //#define MBEDTLS_SSL_OUT_CONTENT_LEN             16384
  //#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 */
  //#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'). */
  //#define MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
  #define MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE
  //#define MBEDTLS_PLATFORM_ZEROIZE_ALT
  //#define MBEDTLS_PLATFORM_GMTIME_R_ALT
  
  #if defined(MBEDTLS_USER_CONFIG_FILE)
  #include MBEDTLS_USER_CONFIG_FILE
  #endif
  
  #include "mbedtls/check_config.h"
  
  #endif /* MBEDTLS_CONFIG_H */
  