dll/3rdparty/mbedtls/error.c

   1 /*
   2  *  Error message information
   3  *
   4  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
   5  *  SPDX-License-Identifier: GPL-2.0
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License along
  18  *  with this program; if not, write to the Free Software Foundation, Inc.,
  19  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  *  This file is part of mbed TLS (https://tls.mbed.org)
  22  */
  23
  24 #if !defined(MBEDTLS_CONFIG_FILE)
  25 #include "mbedtls/config.h"
  26 #else
  27 #include MBEDTLS_CONFIG_FILE
  28 #endif
  29
  30 #if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
  31 #include "mbedtls/error.h"
  32 #include <string.h>
  33 #endif
  34
  35 #if defined(MBEDTLS_PLATFORM_C)
  36 #include "mbedtls/platform.h"
  37 #else
  38 #define mbedtls_snprintf snprintf
  39 #define mbedtls_time_t   time_t
  40 #endif
  41
  42 #if defined(MBEDTLS_ERROR_C)
  43
  44 #include <stdio.h>
  45
  46 #if defined(MBEDTLS_AES_C)
  47 #include "mbedtls/aes.h"
  48 #endif
  49
  50 #if defined(MBEDTLS_ARC4_C)
  51 #include "mbedtls/arc4.h"
  52 #endif
  53
  54 #if defined(MBEDTLS_BASE64_C)
  55 #include "mbedtls/base64.h"
  56 #endif
  57
  58 #if defined(MBEDTLS_BIGNUM_C)
  59 #include "mbedtls/bignum.h"
  60 #endif
  61
  62 #if defined(MBEDTLS_BLOWFISH_C)
  63 #include "mbedtls/blowfish.h"
  64 #endif
  65
  66 #if defined(MBEDTLS_CAMELLIA_C)
  67 #include "mbedtls/camellia.h"
  68 #endif
  69
  70 #if defined(MBEDTLS_CCM_C)
  71 #include "mbedtls/ccm.h"
  72 #endif
  73
  74 #if defined(MBEDTLS_CIPHER_C)
  75 #include "mbedtls/cipher.h"
  76 #endif
  77
  78 #if defined(MBEDTLS_CMAC_C)
  79 #include "mbedtls/cmac.h"
  80 #endif
  81
  82 #if defined(MBEDTLS_CTR_DRBG_C)
  83 #include "mbedtls/ctr_drbg.h"
  84 #endif
  85
  86 #if defined(MBEDTLS_DES_C)
  87 #include "mbedtls/des.h"
  88 #endif
  89
  90 #if defined(MBEDTLS_DHM_C)
  91 #include "mbedtls/dhm.h"
  92 #endif
  93
  94 #if defined(MBEDTLS_ECP_C)
  95 #include "mbedtls/ecp.h"
  96 #endif
  97
  98 #if defined(MBEDTLS_ENTROPY_C)
  99 #include "mbedtls/entropy.h"
 100 #endif
 101
 102 #if defined(MBEDTLS_GCM_C)
 103 #include "mbedtls/gcm.h"
 104 #endif
 105
 106 #if defined(MBEDTLS_HMAC_DRBG_C)
 107 #include "mbedtls/hmac_drbg.h"
 108 #endif
 109
 110 #if defined(MBEDTLS_MD_C)
 111 #include "mbedtls/md.h"
 112 #endif
 113
 114 #if defined(MBEDTLS_MD2_C)
 115 #include "mbedtls/md2.h"
 116 #endif
 117
 118 #if defined(MBEDTLS_MD4_C)
 119 #include "mbedtls/md4.h"
 120 #endif
 121
 122 #if defined(MBEDTLS_MD5_C)
 123 #include "mbedtls/md5.h"
 124 #endif
 125
 126 #if defined(MBEDTLS_NET_C)
 127 #include "mbedtls/net_sockets.h"
 128 #endif
 129
 130 #if defined(MBEDTLS_OID_C)
 131 #include "mbedtls/oid.h"
 132 #endif
 133
 134 #if defined(MBEDTLS_PADLOCK_C)
 135 #include "mbedtls/padlock.h"
 136 #endif
 137
 138 #if defined(MBEDTLS_PEM_PARSE_C) || defined(MBEDTLS_PEM_WRITE_C)
 139 #include "mbedtls/pem.h"
 140 #endif
 141
 142 #if defined(MBEDTLS_PK_C)
 143 #include "mbedtls/pk.h"
 144 #endif
 145
 146 #if defined(MBEDTLS_PKCS12_C)
 147 #include "mbedtls/pkcs12.h"
 148 #endif
 149
 150 #if defined(MBEDTLS_PKCS5_C)
 151 #include "mbedtls/pkcs5.h"
 152 #endif
 153
 154 #if defined(MBEDTLS_RIPEMD160_C)
 155 #include "mbedtls/ripemd160.h"
 156 #endif
 157
 158 #if defined(MBEDTLS_RSA_C)
 159 #include "mbedtls/rsa.h"
 160 #endif
 161
 162 #if defined(MBEDTLS_SHA1_C)
 163 #include "mbedtls/sha1.h"
 164 #endif
 165
 166 #if defined(MBEDTLS_SHA256_C)
 167 #include "mbedtls/sha256.h"
 168 #endif
 169
 170 #if defined(MBEDTLS_SHA512_C)
 171 #include "mbedtls/sha512.h"
 172 #endif
 173
 174 #if defined(MBEDTLS_SSL_TLS_C)
 175 #include "mbedtls/ssl.h"
 176 #endif
 177
 178 #if defined(MBEDTLS_THREADING_C)
 179 #include "mbedtls/threading.h"
 180 #endif
 181
 182 #if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)
 183 #include "mbedtls/x509.h"
 184 #endif
 185
 186 #if defined(MBEDTLS_XTEA_C)
 187 #include "mbedtls/xtea.h"
 188 #endif
 189
 190
 191 void mbedtls_strerror( int ret, char *buf, size_t buflen )
 192 {
 193     size_t len;
 194     int use_ret;
 195
 196     if( buflen == 0 )
 197         return;
 198
 199     memset( buf, 0x00, buflen );
 200
 201     if( ret < 0 )
 202         ret = -ret;
 203
 204     if( ret & 0xFF80 )
 205     {
 206         use_ret = ret & 0xFF80;
 207
 208         // High level error codes
 209         //
 210         // BEGIN generated code
 211 #if defined(MBEDTLS_CIPHER_C)
 212         if( use_ret == -(MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE) )
 213             mbedtls_snprintf( buf, buflen, "CIPHER - The selected feature is not available" );
 214         if( use_ret == -(MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA) )
 215             mbedtls_snprintf( buf, buflen, "CIPHER - Bad input parameters" );
 216         if( use_ret == -(MBEDTLS_ERR_CIPHER_ALLOC_FAILED) )
 217             mbedtls_snprintf( buf, buflen, "CIPHER - Failed to allocate memory" );
 218         if( use_ret == -(MBEDTLS_ERR_CIPHER_INVALID_PADDING) )
 219             mbedtls_snprintf( buf, buflen, "CIPHER - Input data contains invalid padding and is rejected" );
 220         if( use_ret == -(MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED) )
 221             mbedtls_snprintf( buf, buflen, "CIPHER - Decryption of block requires a full block" );
 222         if( use_ret == -(MBEDTLS_ERR_CIPHER_AUTH_FAILED) )
 223             mbedtls_snprintf( buf, buflen, "CIPHER - Authentication failed (for AEAD modes)" );
 224         if( use_ret == -(MBEDTLS_ERR_CIPHER_INVALID_CONTEXT) )
 225             mbedtls_snprintf( buf, buflen, "CIPHER - The context is invalid. For example, because it was freed" );
 226         if( use_ret == -(MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED) )
 227             mbedtls_snprintf( buf, buflen, "CIPHER - Cipher hardware accelerator failed" );
 228 #endif /* MBEDTLS_CIPHER_C */
 229
 230 #if defined(MBEDTLS_DHM_C)
 231         if( use_ret == -(MBEDTLS_ERR_DHM_BAD_INPUT_DATA) )
 232             mbedtls_snprintf( buf, buflen, "DHM - Bad input parameters" );
 233         if( use_ret == -(MBEDTLS_ERR_DHM_READ_PARAMS_FAILED) )
 234             mbedtls_snprintf( buf, buflen, "DHM - Reading of the DHM parameters failed" );
 235         if( use_ret == -(MBEDTLS_ERR_DHM_MAKE_PARAMS_FAILED) )
 236             mbedtls_snprintf( buf, buflen, "DHM - Making of the DHM parameters failed" );
 237         if( use_ret == -(MBEDTLS_ERR_DHM_READ_PUBLIC_FAILED) )
 238             mbedtls_snprintf( buf, buflen, "DHM - Reading of the public values failed" );
 239         if( use_ret == -(MBEDTLS_ERR_DHM_MAKE_PUBLIC_FAILED) )
 240             mbedtls_snprintf( buf, buflen, "DHM - Making of the public value failed" );
 241         if( use_ret == -(MBEDTLS_ERR_DHM_CALC_SECRET_FAILED) )
 242             mbedtls_snprintf( buf, buflen, "DHM - Calculation of the DHM secret failed" );
 243         if( use_ret == -(MBEDTLS_ERR_DHM_INVALID_FORMAT) )
 244             mbedtls_snprintf( buf, buflen, "DHM - The ASN.1 data is not formatted correctly" );
 245         if( use_ret == -(MBEDTLS_ERR_DHM_ALLOC_FAILED) )
 246             mbedtls_snprintf( buf, buflen, "DHM - Allocation of memory failed" );
 247         if( use_ret == -(MBEDTLS_ERR_DHM_FILE_IO_ERROR) )
 248             mbedtls_snprintf( buf, buflen, "DHM - Read or write of file failed" );
 249         if( use_ret == -(MBEDTLS_ERR_DHM_HW_ACCEL_FAILED) )
 250             mbedtls_snprintf( buf, buflen, "DHM - DHM hardware accelerator failed" );
 251         if( use_ret == -(MBEDTLS_ERR_DHM_SET_GROUP_FAILED) )
 252             mbedtls_snprintf( buf, buflen, "DHM - Setting the modulus and generator failed" );
 253 #endif /* MBEDTLS_DHM_C */
 254
 255 #if defined(MBEDTLS_ECP_C)
 256         if( use_ret == -(MBEDTLS_ERR_ECP_BAD_INPUT_DATA) )
 257             mbedtls_snprintf( buf, buflen, "ECP - Bad input parameters to function" );
 258         if( use_ret == -(MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL) )
 259             mbedtls_snprintf( buf, buflen, "ECP - The buffer is too small to write to" );
 260         if( use_ret == -(MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE) )
 261             mbedtls_snprintf( buf, buflen, "ECP - Requested curve not available" );
 262         if( use_ret == -(MBEDTLS_ERR_ECP_VERIFY_FAILED) )
 263             mbedtls_snprintf( buf, buflen, "ECP - The signature is not valid" );
 264         if( use_ret == -(MBEDTLS_ERR_ECP_ALLOC_FAILED) )
 265             mbedtls_snprintf( buf, buflen, "ECP - Memory allocation failed" );
 266         if( use_ret == -(MBEDTLS_ERR_ECP_RANDOM_FAILED) )
 267             mbedtls_snprintf( buf, buflen, "ECP - Generation of random value, such as (ephemeral) key, failed" );
 268         if( use_ret == -(MBEDTLS_ERR_ECP_INVALID_KEY) )
 269             mbedtls_snprintf( buf, buflen, "ECP - Invalid private or public key" );
 270         if( use_ret == -(MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) )
 271             mbedtls_snprintf( buf, buflen, "ECP - The buffer contains a valid signature followed by more data" );
 272         if( use_ret == -(MBEDTLS_ERR_ECP_HW_ACCEL_FAILED) )
 273             mbedtls_snprintf( buf, buflen, "ECP - ECP hardware accelerator failed" );
 274 #endif /* MBEDTLS_ECP_C */
 275
 276 #if defined(MBEDTLS_MD_C)
 277         if( use_ret == -(MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE) )
 278             mbedtls_snprintf( buf, buflen, "MD - The selected feature is not available" );
 279         if( use_ret == -(MBEDTLS_ERR_MD_BAD_INPUT_DATA) )
 280             mbedtls_snprintf( buf, buflen, "MD - Bad input parameters to function" );
 281         if( use_ret == -(MBEDTLS_ERR_MD_ALLOC_FAILED) )
 282             mbedtls_snprintf( buf, buflen, "MD - Failed to allocate memory" );
 283         if( use_ret == -(MBEDTLS_ERR_MD_FILE_IO_ERROR) )
 284             mbedtls_snprintf( buf, buflen, "MD - Opening or reading of file failed" );
 285         if( use_ret == -(MBEDTLS_ERR_MD_HW_ACCEL_FAILED) )
 286             mbedtls_snprintf( buf, buflen, "MD - MD hardware accelerator failed" );
 287 #endif /* MBEDTLS_MD_C */
 288
 289 #if defined(MBEDTLS_PEM_PARSE_C) || defined(MBEDTLS_PEM_WRITE_C)
 290         if( use_ret == -(MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) )
 291             mbedtls_snprintf( buf, buflen, "PEM - No PEM header or footer found" );
 292         if( use_ret == -(MBEDTLS_ERR_PEM_INVALID_DATA) )
 293             mbedtls_snprintf( buf, buflen, "PEM - PEM string is not as expected" );
 294         if( use_ret == -(MBEDTLS_ERR_PEM_ALLOC_FAILED) )
 295             mbedtls_snprintf( buf, buflen, "PEM - Failed to allocate memory" );
 296         if( use_ret == -(MBEDTLS_ERR_PEM_INVALID_ENC_IV) )
 297             mbedtls_snprintf( buf, buflen, "PEM - RSA IV is not in hex-format" );
 298         if( use_ret == -(MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG) )
 299             mbedtls_snprintf( buf, buflen, "PEM - Unsupported key encryption algorithm" );
 300         if( use_ret == -(MBEDTLS_ERR_PEM_PASSWORD_REQUIRED) )
 301             mbedtls_snprintf( buf, buflen, "PEM - Private key password can't be empty" );
 302         if( use_ret == -(MBEDTLS_ERR_PEM_PASSWORD_MISMATCH) )
 303             mbedtls_snprintf( buf, buflen, "PEM - Given private key password does not allow for correct decryption" );
 304         if( use_ret == -(MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE) )
 305             mbedtls_snprintf( buf, buflen, "PEM - Unavailable feature, e.g. hashing/encryption combination" );
 306         if( use_ret == -(MBEDTLS_ERR_PEM_BAD_INPUT_DATA) )
 307             mbedtls_snprintf( buf, buflen, "PEM - Bad input parameters to function" );
 308 #endif /* MBEDTLS_PEM_PARSE_C || MBEDTLS_PEM_WRITE_C */
 309
 310 #if defined(MBEDTLS_PK_C)
 311         if( use_ret == -(MBEDTLS_ERR_PK_ALLOC_FAILED) )
 312             mbedtls_snprintf( buf, buflen, "PK - Memory allocation failed" );
 313         if( use_ret == -(MBEDTLS_ERR_PK_TYPE_MISMATCH) )
 314             mbedtls_snprintf( buf, buflen, "PK - Type mismatch, eg attempt to encrypt with an ECDSA key" );
 315         if( use_ret == -(MBEDTLS_ERR_PK_BAD_INPUT_DATA) )
 316             mbedtls_snprintf( buf, buflen, "PK - Bad input parameters to function" );
 317         if( use_ret == -(MBEDTLS_ERR_PK_FILE_IO_ERROR) )
 318             mbedtls_snprintf( buf, buflen, "PK - Read/write of file failed" );
 319         if( use_ret == -(MBEDTLS_ERR_PK_KEY_INVALID_VERSION) )
 320             mbedtls_snprintf( buf, buflen, "PK - Unsupported key version" );
 321         if( use_ret == -(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT) )
 322             mbedtls_snprintf( buf, buflen, "PK - Invalid key tag or value" );
 323         if( use_ret == -(MBEDTLS_ERR_PK_UNKNOWN_PK_ALG) )
 324             mbedtls_snprintf( buf, buflen, "PK - Key algorithm is unsupported (only RSA and EC are supported)" );
 325         if( use_ret == -(MBEDTLS_ERR_PK_PASSWORD_REQUIRED) )
 326             mbedtls_snprintf( buf, buflen, "PK - Private key password can't be empty" );
 327         if( use_ret == -(MBEDTLS_ERR_PK_PASSWORD_MISMATCH) )
 328             mbedtls_snprintf( buf, buflen, "PK - Given private key password does not allow for correct decryption" );
 329         if( use_ret == -(MBEDTLS_ERR_PK_INVALID_PUBKEY) )
 330             mbedtls_snprintf( buf, buflen, "PK - The pubkey tag or value is invalid (only RSA and EC are supported)" );
 331         if( use_ret == -(MBEDTLS_ERR_PK_INVALID_ALG) )
 332             mbedtls_snprintf( buf, buflen, "PK - The algorithm tag or value is invalid" );
 333         if( use_ret == -(MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE) )
 334             mbedtls_snprintf( buf, buflen, "PK - Elliptic curve is unsupported (only NIST curves are supported)" );
 335         if( use_ret == -(MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE) )
 336             mbedtls_snprintf( buf, buflen, "PK - Unavailable feature, e.g. RSA disabled for RSA key" );
 337         if( use_ret == -(MBEDTLS_ERR_PK_SIG_LEN_MISMATCH) )
 338             mbedtls_snprintf( buf, buflen, "PK - The buffer contains a valid signature followed by more data" );
 339         if( use_ret == -(MBEDTLS_ERR_PK_HW_ACCEL_FAILED) )
 340             mbedtls_snprintf( buf, buflen, "PK - PK hardware accelerator failed" );
 341 #endif /* MBEDTLS_PK_C */
 342
 343 #if defined(MBEDTLS_PKCS12_C)
 344         if( use_ret == -(MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA) )
 345             mbedtls_snprintf( buf, buflen, "PKCS12 - Bad input parameters to function" );
 346         if( use_ret == -(MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE) )
 347             mbedtls_snprintf( buf, buflen, "PKCS12 - Feature not available, e.g. unsupported encryption scheme" );
 348         if( use_ret == -(MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT) )
 349             mbedtls_snprintf( buf, buflen, "PKCS12 - PBE ASN.1 data not as expected" );
 350         if( use_ret == -(MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH) )
 351             mbedtls_snprintf( buf, buflen, "PKCS12 - Given private key password does not allow for correct decryption" );
 352 #endif /* MBEDTLS_PKCS12_C */
 353
 354 #if defined(MBEDTLS_PKCS5_C)
 355         if( use_ret == -(MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA) )
 356             mbedtls_snprintf( buf, buflen, "PKCS5 - Bad input parameters to function" );
 357         if( use_ret == -(MBEDTLS_ERR_PKCS5_INVALID_FORMAT) )
 358             mbedtls_snprintf( buf, buflen, "PKCS5 - Unexpected ASN.1 data" );
 359         if( use_ret == -(MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE) )
 360             mbedtls_snprintf( buf, buflen, "PKCS5 - Requested encryption or digest alg not available" );
 361         if( use_ret == -(MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH) )
 362             mbedtls_snprintf( buf, buflen, "PKCS5 - Given private key password does not allow for correct decryption" );
 363 #endif /* MBEDTLS_PKCS5_C */
 364
 365 #if defined(MBEDTLS_RSA_C)
 366         if( use_ret == -(MBEDTLS_ERR_RSA_BAD_INPUT_DATA) )
 367             mbedtls_snprintf( buf, buflen, "RSA - Bad input parameters to function" );
 368         if( use_ret == -(MBEDTLS_ERR_RSA_INVALID_PADDING) )
 369             mbedtls_snprintf( buf, buflen, "RSA - Input data contains invalid padding and is rejected" );
 370         if( use_ret == -(MBEDTLS_ERR_RSA_KEY_GEN_FAILED) )
 371             mbedtls_snprintf( buf, buflen, "RSA - Something failed during generation of a key" );
 372         if( use_ret == -(MBEDTLS_ERR_RSA_KEY_CHECK_FAILED) )
 373             mbedtls_snprintf( buf, buflen, "RSA - Key failed to pass the validity check of the library" );
 374         if( use_ret == -(MBEDTLS_ERR_RSA_PUBLIC_FAILED) )
 375             mbedtls_snprintf( buf, buflen, "RSA - The public key operation failed" );
 376         if( use_ret == -(MBEDTLS_ERR_RSA_PRIVATE_FAILED) )
 377             mbedtls_snprintf( buf, buflen, "RSA - The private key operation failed" );
 378         if( use_ret == -(MBEDTLS_ERR_RSA_VERIFY_FAILED) )
 379             mbedtls_snprintf( buf, buflen, "RSA - The PKCS#1 verification failed" );
 380         if( use_ret == -(MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE) )
 381             mbedtls_snprintf( buf, buflen, "RSA - The output buffer for decryption is not large enough" );
 382         if( use_ret == -(MBEDTLS_ERR_RSA_RNG_FAILED) )
 383             mbedtls_snprintf( buf, buflen, "RSA - The random generator failed to generate non-zeros" );
 384         if( use_ret == -(MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION) )
 385             mbedtls_snprintf( buf, buflen, "RSA - The implementation does not offer the requested operation, for example, because of security violations or lack of functionality" );
 386         if( use_ret == -(MBEDTLS_ERR_RSA_HW_ACCEL_FAILED) )
 387             mbedtls_snprintf( buf, buflen, "RSA - RSA hardware accelerator failed" );
 388 #endif /* MBEDTLS_RSA_C */
 389
 390 #if defined(MBEDTLS_SSL_TLS_C)
 391         if( use_ret == -(MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE) )
 392             mbedtls_snprintf( buf, buflen, "SSL - The requested feature is not available" );
 393         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_INPUT_DATA) )
 394             mbedtls_snprintf( buf, buflen, "SSL - Bad input parameters to function" );
 395         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_MAC) )
 396             mbedtls_snprintf( buf, buflen, "SSL - Verification of the message MAC failed" );
 397         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_RECORD) )
 398             mbedtls_snprintf( buf, buflen, "SSL - An invalid SSL record was received" );
 399         if( use_ret == -(MBEDTLS_ERR_SSL_CONN_EOF) )
 400             mbedtls_snprintf( buf, buflen, "SSL - The connection indicated an EOF" );
 401         if( use_ret == -(MBEDTLS_ERR_SSL_UNKNOWN_CIPHER) )
 402             mbedtls_snprintf( buf, buflen, "SSL - An unknown cipher was received" );
 403         if( use_ret == -(MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN) )
 404             mbedtls_snprintf( buf, buflen, "SSL - The server has no ciphersuites in common with the client" );
 405         if( use_ret == -(MBEDTLS_ERR_SSL_NO_RNG) )
 406             mbedtls_snprintf( buf, buflen, "SSL - No RNG was provided to the SSL module" );
 407         if( use_ret == -(MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE) )
 408             mbedtls_snprintf( buf, buflen, "SSL - No client certification received from the client, but required by the authentication mode" );
 409         if( use_ret == -(MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE) )
 410             mbedtls_snprintf( buf, buflen, "SSL - Our own certificate(s) is/are too large to send in an SSL message" );
 411         if( use_ret == -(MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED) )
 412             mbedtls_snprintf( buf, buflen, "SSL - The own certificate is not set, but needed by the server" );
 413         if( use_ret == -(MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED) )
 414             mbedtls_snprintf( buf, buflen, "SSL - The own private key or pre-shared key is not set, but needed" );
 415         if( use_ret == -(MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED) )
 416             mbedtls_snprintf( buf, buflen, "SSL - No CA Chain is set, but required to operate" );
 417         if( use_ret == -(MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE) )
 418             mbedtls_snprintf( buf, buflen, "SSL - An unexpected message was received from our peer" );
 419         if( use_ret == -(MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE) )
 420         {
 421             mbedtls_snprintf( buf, buflen, "SSL - A fatal alert message was received from our peer" );
 422             return;
 423         }
 424         if( use_ret == -(MBEDTLS_ERR_SSL_PEER_VERIFY_FAILED) )
 425             mbedtls_snprintf( buf, buflen, "SSL - Verification of our peer failed" );
 426         if( use_ret == -(MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) )
 427             mbedtls_snprintf( buf, buflen, "SSL - The peer notified us that the connection is going to be closed" );
 428         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO) )
 429             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientHello handshake message failed" );
 430         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO) )
 431             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerHello handshake message failed" );
 432         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE) )
 433             mbedtls_snprintf( buf, buflen, "SSL - Processing of the Certificate handshake message failed" );
 434         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST) )
 435             mbedtls_snprintf( buf, buflen, "SSL - Processing of the CertificateRequest handshake message failed" );
 436         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE) )
 437             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerKeyExchange handshake message failed" );
 438         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE) )
 439             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerHelloDone handshake message failed" );
 440         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE) )
 441             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed" );
 442         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP) )
 443             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Read Public" );
 444         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS) )
 445             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Calculate Secret" );
 446         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY) )
 447             mbedtls_snprintf( buf, buflen, "SSL - Processing of the CertificateVerify handshake message failed" );
 448         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC) )
 449             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ChangeCipherSpec handshake message failed" );
 450         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_FINISHED) )
 451             mbedtls_snprintf( buf, buflen, "SSL - Processing of the Finished handshake message failed" );
 452         if( use_ret == -(MBEDTLS_ERR_SSL_ALLOC_FAILED) )
 453             mbedtls_snprintf( buf, buflen, "SSL - Memory allocation failed" );
 454         if( use_ret == -(MBEDTLS_ERR_SSL_HW_ACCEL_FAILED) )
 455             mbedtls_snprintf( buf, buflen, "SSL - Hardware acceleration function returned with error" );
 456         if( use_ret == -(MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH) )
 457             mbedtls_snprintf( buf, buflen, "SSL - Hardware acceleration function skipped / left alone data" );
 458         if( use_ret == -(MBEDTLS_ERR_SSL_COMPRESSION_FAILED) )
 459             mbedtls_snprintf( buf, buflen, "SSL - Processing of the compression / decompression failed" );
 460         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION) )
 461             mbedtls_snprintf( buf, buflen, "SSL - Handshake protocol not within min/max boundaries" );
 462         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET) )
 463             mbedtls_snprintf( buf, buflen, "SSL - Processing of the NewSessionTicket handshake message failed" );
 464         if( use_ret == -(MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED) )
 465             mbedtls_snprintf( buf, buflen, "SSL - Session ticket has expired" );
 466         if( use_ret == -(MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH) )
 467             mbedtls_snprintf( buf, buflen, "SSL - Public key type mismatch (eg, asked for RSA key exchange and presented EC key)" );
 468         if( use_ret == -(MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY) )
 469             mbedtls_snprintf( buf, buflen, "SSL - Unknown identity received (eg, PSK identity)" );
 470         if( use_ret == -(MBEDTLS_ERR_SSL_INTERNAL_ERROR) )
 471             mbedtls_snprintf( buf, buflen, "SSL - Internal error (eg, unexpected failure in lower-level module)" );
 472         if( use_ret == -(MBEDTLS_ERR_SSL_COUNTER_WRAPPING) )
 473             mbedtls_snprintf( buf, buflen, "SSL - A counter would wrap (eg, too many messages exchanged)" );
 474         if( use_ret == -(MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO) )
 475             mbedtls_snprintf( buf, buflen, "SSL - Unexpected message at ServerHello in renegotiation" );
 476         if( use_ret == -(MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED) )
 477             mbedtls_snprintf( buf, buflen, "SSL - DTLS client must retry for hello verification" );
 478         if( use_ret == -(MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL) )
 479             mbedtls_snprintf( buf, buflen, "SSL - A buffer is too small to receive or write a message" );
 480         if( use_ret == -(MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE) )
 481             mbedtls_snprintf( buf, buflen, "SSL - None of the common ciphersuites is usable (eg, no suitable certificate, see debug messages)" );
 482         if( use_ret == -(MBEDTLS_ERR_SSL_WANT_READ) )
 483             mbedtls_snprintf( buf, buflen, "SSL - Connection requires a read call" );
 484         if( use_ret == -(MBEDTLS_ERR_SSL_WANT_WRITE) )
 485             mbedtls_snprintf( buf, buflen, "SSL - Connection requires a write call" );
 486         if( use_ret == -(MBEDTLS_ERR_SSL_TIMEOUT) )
 487             mbedtls_snprintf( buf, buflen, "SSL - The operation timed out" );
 488         if( use_ret == -(MBEDTLS_ERR_SSL_CLIENT_RECONNECT) )
 489             mbedtls_snprintf( buf, buflen, "SSL - The client initiated a reconnect from the same port" );
 490         if( use_ret == -(MBEDTLS_ERR_SSL_UNEXPECTED_RECORD) )
 491             mbedtls_snprintf( buf, buflen, "SSL - Record header looks valid but is not expected" );
 492         if( use_ret == -(MBEDTLS_ERR_SSL_NON_FATAL) )
 493             mbedtls_snprintf( buf, buflen, "SSL - The alert message received indicates a non-fatal error" );
 494         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH) )
 495             mbedtls_snprintf( buf, buflen, "SSL - Couldn't set the hash for verifying CertificateVerify" );
 496 #endif /* MBEDTLS_SSL_TLS_C */
 497
 498 #if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)
 499         if( use_ret == -(MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE) )
 500             mbedtls_snprintf( buf, buflen, "X509 - Unavailable feature, e.g. RSA hashing/encryption combination" );
 501         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_OID) )
 502             mbedtls_snprintf( buf, buflen, "X509 - Requested OID is unknown" );
 503         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_FORMAT) )
 504             mbedtls_snprintf( buf, buflen, "X509 - The CRT/CRL/CSR format is invalid, e.g. different type expected" );
 505         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_VERSION) )
 506             mbedtls_snprintf( buf, buflen, "X509 - The CRT/CRL/CSR version element is invalid" );
 507         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_SERIAL) )
 508             mbedtls_snprintf( buf, buflen, "X509 - The serial tag or value is invalid" );
 509         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_ALG) )
 510             mbedtls_snprintf( buf, buflen, "X509 - The algorithm tag or value is invalid" );
 511         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_NAME) )
 512             mbedtls_snprintf( buf, buflen, "X509 - The name tag or value is invalid" );
 513         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_DATE) )
 514             mbedtls_snprintf( buf, buflen, "X509 - The date tag or value is invalid" );
 515         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_SIGNATURE) )
 516             mbedtls_snprintf( buf, buflen, "X509 - The signature tag or value invalid" );
 517         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_EXTENSIONS) )
 518             mbedtls_snprintf( buf, buflen, "X509 - The extension tag or value is invalid" );
 519         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_VERSION) )
 520             mbedtls_snprintf( buf, buflen, "X509 - CRT/CRL/CSR has an unsupported version number" );
 521         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG) )
 522             mbedtls_snprintf( buf, buflen, "X509 - Signature algorithm (oid) is unsupported" );
 523         if( use_ret == -(MBEDTLS_ERR_X509_SIG_MISMATCH) )
 524             mbedtls_snprintf( buf, buflen, "X509 - Signature algorithms do not match. (see \\c ::mbedtls_x509_crt sig_oid)" );
 525         if( use_ret == -(MBEDTLS_ERR_X509_CERT_VERIFY_FAILED) )
 526             mbedtls_snprintf( buf, buflen, "X509 - Certificate verification failed, e.g. CRL, CA or signature check failed" );
 527         if( use_ret == -(MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT) )
 528             mbedtls_snprintf( buf, buflen, "X509 - Format not recognized as DER or PEM" );
 529         if( use_ret == -(MBEDTLS_ERR_X509_BAD_INPUT_DATA) )
 530             mbedtls_snprintf( buf, buflen, "X509 - Input invalid" );
 531         if( use_ret == -(MBEDTLS_ERR_X509_ALLOC_FAILED) )
 532             mbedtls_snprintf( buf, buflen, "X509 - Allocation of memory failed" );
 533         if( use_ret == -(MBEDTLS_ERR_X509_FILE_IO_ERROR) )
 534             mbedtls_snprintf( buf, buflen, "X509 - Read/write of file failed" );
 535         if( use_ret == -(MBEDTLS_ERR_X509_BUFFER_TOO_SMALL) )
 536             mbedtls_snprintf( buf, buflen, "X509 - Destination buffer is too small" );
 537         if( use_ret == -(MBEDTLS_ERR_X509_FATAL_ERROR) )
 538             mbedtls_snprintf( buf, buflen, "X509 - A fatal error occured, eg the chain is too long or the vrfy callback failed" );
 539 #endif /* MBEDTLS_X509_USE_C || MBEDTLS_X509_CREATE_C */
 540         // END generated code
 541
 542         if( strlen( buf ) == 0 )
 543             mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
 544     }
 545
 546     use_ret = ret & ~0xFF80;
 547
 548     if( use_ret == 0 )
 549         return;
 550
 551     // If high level code is present, make a concatenation between both
 552     // error strings.
 553     //
 554     len = strlen( buf );
 555
 556     if( len > 0 )
 557     {
 558         if( buflen - len < 5 )
 559             return;
 560
 561         mbedtls_snprintf( buf + len, buflen - len, " : " );
 562
 563         buf += len + 3;
 564         buflen -= len + 3;
 565     }
 566
 567     // Low level error codes
 568     //
 569     // BEGIN generated code
 570 #if defined(MBEDTLS_AES_C)
 571     if( use_ret == -(MBEDTLS_ERR_AES_INVALID_KEY_LENGTH) )
 572         mbedtls_snprintf( buf, buflen, "AES - Invalid key length" );
 573     if( use_ret == -(MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH) )
 574         mbedtls_snprintf( buf, buflen, "AES - Invalid data input length" );
 575     if( use_ret == -(MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE) )
 576         mbedtls_snprintf( buf, buflen, "AES - Feature not available. For example, an unsupported AES key size" );
 577     if( use_ret == -(MBEDTLS_ERR_AES_HW_ACCEL_FAILED) )
 578         mbedtls_snprintf( buf, buflen, "AES - AES hardware accelerator failed" );
 579 #endif /* MBEDTLS_AES_C */
 580
 581 #if defined(MBEDTLS_ARC4_C)
 582     if( use_ret == -(MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED) )
 583         mbedtls_snprintf( buf, buflen, "ARC4 - ARC4 hardware accelerator failed" );
 584 #endif /* MBEDTLS_ARC4_C */
 585
 586 #if defined(MBEDTLS_ASN1_PARSE_C)
 587     if( use_ret == -(MBEDTLS_ERR_ASN1_OUT_OF_DATA) )
 588         mbedtls_snprintf( buf, buflen, "ASN1 - Out of data when parsing an ASN1 data structure" );
 589     if( use_ret == -(MBEDTLS_ERR_ASN1_UNEXPECTED_TAG) )
 590         mbedtls_snprintf( buf, buflen, "ASN1 - ASN1 tag was of an unexpected value" );
 591     if( use_ret == -(MBEDTLS_ERR_ASN1_INVALID_LENGTH) )
 592         mbedtls_snprintf( buf, buflen, "ASN1 - Error when trying to determine the length or invalid length" );
 593     if( use_ret == -(MBEDTLS_ERR_ASN1_LENGTH_MISMATCH) )
 594         mbedtls_snprintf( buf, buflen, "ASN1 - Actual length differs from expected length" );
 595     if( use_ret == -(MBEDTLS_ERR_ASN1_INVALID_DATA) )
 596         mbedtls_snprintf( buf, buflen, "ASN1 - Data is invalid. (not used)" );
 597     if( use_ret == -(MBEDTLS_ERR_ASN1_ALLOC_FAILED) )
 598         mbedtls_snprintf( buf, buflen, "ASN1 - Memory allocation failed" );
 599     if( use_ret == -(MBEDTLS_ERR_ASN1_BUF_TOO_SMALL) )
 600         mbedtls_snprintf( buf, buflen, "ASN1 - Buffer too small when writing ASN.1 data structure" );
 601 #endif /* MBEDTLS_ASN1_PARSE_C */
 602
 603 #if defined(MBEDTLS_BASE64_C)
 604     if( use_ret == -(MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL) )
 605         mbedtls_snprintf( buf, buflen, "BASE64 - Output buffer too small" );
 606     if( use_ret == -(MBEDTLS_ERR_BASE64_INVALID_CHARACTER) )
 607         mbedtls_snprintf( buf, buflen, "BASE64 - Invalid character in input" );
 608 #endif /* MBEDTLS_BASE64_C */
 609
 610 #if defined(MBEDTLS_BIGNUM_C)
 611     if( use_ret == -(MBEDTLS_ERR_MPI_FILE_IO_ERROR) )
 612         mbedtls_snprintf( buf, buflen, "BIGNUM - An error occurred while reading from or writing to a file" );
 613     if( use_ret == -(MBEDTLS_ERR_MPI_BAD_INPUT_DATA) )
 614         mbedtls_snprintf( buf, buflen, "BIGNUM - Bad input parameters to function" );
 615     if( use_ret == -(MBEDTLS_ERR_MPI_INVALID_CHARACTER) )
 616         mbedtls_snprintf( buf, buflen, "BIGNUM - There is an invalid character in the digit string" );
 617     if( use_ret == -(MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL) )
 618         mbedtls_snprintf( buf, buflen, "BIGNUM - The buffer is too small to write to" );
 619     if( use_ret == -(MBEDTLS_ERR_MPI_NEGATIVE_VALUE) )
 620         mbedtls_snprintf( buf, buflen, "BIGNUM - The input arguments are negative or result in illegal output" );
 621     if( use_ret == -(MBEDTLS_ERR_MPI_DIVISION_BY_ZERO) )
 622         mbedtls_snprintf( buf, buflen, "BIGNUM - The input argument for division is zero, which is not allowed" );
 623     if( use_ret == -(MBEDTLS_ERR_MPI_NOT_ACCEPTABLE) )
 624         mbedtls_snprintf( buf, buflen, "BIGNUM - The input arguments are not acceptable" );
 625     if( use_ret == -(MBEDTLS_ERR_MPI_ALLOC_FAILED) )
 626         mbedtls_snprintf( buf, buflen, "BIGNUM - Memory allocation failed" );
 627 #endif /* MBEDTLS_BIGNUM_C */
 628
 629 #if defined(MBEDTLS_BLOWFISH_C)
 630     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH) )
 631         mbedtls_snprintf( buf, buflen, "BLOWFISH - Invalid key length" );
 632     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED) )
 633         mbedtls_snprintf( buf, buflen, "BLOWFISH - Blowfish hardware accelerator failed" );
 634     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH) )
 635         mbedtls_snprintf( buf, buflen, "BLOWFISH - Invalid data input length" );
 636 #endif /* MBEDTLS_BLOWFISH_C */
 637
 638 #if defined(MBEDTLS_CAMELLIA_C)
 639     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH) )
 640         mbedtls_snprintf( buf, buflen, "CAMELLIA - Invalid key length" );
 641     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH) )
 642         mbedtls_snprintf( buf, buflen, "CAMELLIA - Invalid data input length" );
 643     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_HW_ACCEL_FAILED) )
 644         mbedtls_snprintf( buf, buflen, "CAMELLIA - Camellia hardware accelerator failed" );
 645 #endif /* MBEDTLS_CAMELLIA_C */
 646
 647 #if defined(MBEDTLS_CCM_C)
 648     if( use_ret == -(MBEDTLS_ERR_CCM_BAD_INPUT) )
 649         mbedtls_snprintf( buf, buflen, "CCM - Bad input parameters to the function" );
 650     if( use_ret == -(MBEDTLS_ERR_CCM_AUTH_FAILED) )
 651         mbedtls_snprintf( buf, buflen, "CCM - Authenticated decryption failed" );
 652     if( use_ret == -(MBEDTLS_ERR_CCM_HW_ACCEL_FAILED) )
 653         mbedtls_snprintf( buf, buflen, "CCM - CCM hardware accelerator failed" );
 654 #endif /* MBEDTLS_CCM_C */
 655
 656 #if defined(MBEDTLS_CMAC_C)
 657     if( use_ret == -(MBEDTLS_ERR_CMAC_HW_ACCEL_FAILED) )
 658         mbedtls_snprintf( buf, buflen, "CMAC - CMAC hardware accelerator failed" );
 659 #endif /* MBEDTLS_CMAC_C */
 660
 661 #if defined(MBEDTLS_CTR_DRBG_C)
 662     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED) )
 663         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The entropy source failed" );
 664     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG) )
 665         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The requested random buffer length is too big" );
 666     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG) )
 667         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The input (entropy + additional data) is too large" );
 668     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR) )
 669         mbedtls_snprintf( buf, buflen, "CTR_DRBG - Read or write error in file" );
 670 #endif /* MBEDTLS_CTR_DRBG_C */
 671
 672 #if defined(MBEDTLS_DES_C)
 673     if( use_ret == -(MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH) )
 674         mbedtls_snprintf( buf, buflen, "DES - The data input has an invalid length" );
 675     if( use_ret == -(MBEDTLS_ERR_DES_HW_ACCEL_FAILED) )
 676         mbedtls_snprintf( buf, buflen, "DES - DES hardware accelerator failed" );
 677 #endif /* MBEDTLS_DES_C */
 678
 679 #if defined(MBEDTLS_ENTROPY_C)
 680     if( use_ret == -(MBEDTLS_ERR_ENTROPY_SOURCE_FAILED) )
 681         mbedtls_snprintf( buf, buflen, "ENTROPY - Critical entropy source failure" );
 682     if( use_ret == -(MBEDTLS_ERR_ENTROPY_MAX_SOURCES) )
 683         mbedtls_snprintf( buf, buflen, "ENTROPY - No more sources can be added" );
 684     if( use_ret == -(MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED) )
 685         mbedtls_snprintf( buf, buflen, "ENTROPY - No sources have been added to poll" );
 686     if( use_ret == -(MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE) )
 687         mbedtls_snprintf( buf, buflen, "ENTROPY - No strong sources have been added to poll" );
 688     if( use_ret == -(MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR) )
 689         mbedtls_snprintf( buf, buflen, "ENTROPY - Read/write error in file" );
 690 #endif /* MBEDTLS_ENTROPY_C */
 691
 692 #if defined(MBEDTLS_GCM_C)
 693     if( use_ret == -(MBEDTLS_ERR_GCM_AUTH_FAILED) )
 694         mbedtls_snprintf( buf, buflen, "GCM - Authenticated decryption failed" );
 695     if( use_ret == -(MBEDTLS_ERR_GCM_HW_ACCEL_FAILED) )
 696         mbedtls_snprintf( buf, buflen, "GCM - GCM hardware accelerator failed" );
 697     if( use_ret == -(MBEDTLS_ERR_GCM_BAD_INPUT) )
 698         mbedtls_snprintf( buf, buflen, "GCM - Bad input parameters to function" );
 699 #endif /* MBEDTLS_GCM_C */
 700
 701 #if defined(MBEDTLS_HMAC_DRBG_C)
 702     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG) )
 703         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Too many random requested in single call" );
 704     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG) )
 705         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Input too large (Entropy + additional)" );
 706     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR) )
 707         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Read/write error in file" );
 708     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED) )
 709         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - The entropy source failed" );
 710 #endif /* MBEDTLS_HMAC_DRBG_C */
 711
 712 #if defined(MBEDTLS_MD2_C)
 713     if( use_ret == -(MBEDTLS_ERR_MD2_HW_ACCEL_FAILED) )
 714         mbedtls_snprintf( buf, buflen, "MD2 - MD2 hardware accelerator failed" );
 715 #endif /* MBEDTLS_MD2_C */
 716
 717 #if defined(MBEDTLS_MD4_C)
 718     if( use_ret == -(MBEDTLS_ERR_MD4_HW_ACCEL_FAILED) )
 719         mbedtls_snprintf( buf, buflen, "MD4 - MD4 hardware accelerator failed" );
 720 #endif /* MBEDTLS_MD4_C */
 721
 722 #if defined(MBEDTLS_MD5_C)
 723     if( use_ret == -(MBEDTLS_ERR_MD5_HW_ACCEL_FAILED) )
 724         mbedtls_snprintf( buf, buflen, "MD5 - MD5 hardware accelerator failed" );
 725 #endif /* MBEDTLS_MD5_C */
 726
 727 #if defined(MBEDTLS_NET_C)
 728     if( use_ret == -(MBEDTLS_ERR_NET_SOCKET_FAILED) )
 729         mbedtls_snprintf( buf, buflen, "NET - Failed to open a socket" );
 730     if( use_ret == -(MBEDTLS_ERR_NET_CONNECT_FAILED) )
 731         mbedtls_snprintf( buf, buflen, "NET - The connection to the given server / port failed" );
 732     if( use_ret == -(MBEDTLS_ERR_NET_BIND_FAILED) )
 733         mbedtls_snprintf( buf, buflen, "NET - Binding of the socket failed" );
 734     if( use_ret == -(MBEDTLS_ERR_NET_LISTEN_FAILED) )
 735         mbedtls_snprintf( buf, buflen, "NET - Could not listen on the socket" );
 736     if( use_ret == -(MBEDTLS_ERR_NET_ACCEPT_FAILED) )
 737         mbedtls_snprintf( buf, buflen, "NET - Could not accept the incoming connection" );
 738     if( use_ret == -(MBEDTLS_ERR_NET_RECV_FAILED) )
 739         mbedtls_snprintf( buf, buflen, "NET - Reading information from the socket failed" );
 740     if( use_ret == -(MBEDTLS_ERR_NET_SEND_FAILED) )
 741         mbedtls_snprintf( buf, buflen, "NET - Sending information through the socket failed" );
 742     if( use_ret == -(MBEDTLS_ERR_NET_CONN_RESET) )
 743         mbedtls_snprintf( buf, buflen, "NET - Connection was reset by peer" );
 744     if( use_ret == -(MBEDTLS_ERR_NET_UNKNOWN_HOST) )
 745         mbedtls_snprintf( buf, buflen, "NET - Failed to get an IP address for the given hostname" );
 746     if( use_ret == -(MBEDTLS_ERR_NET_BUFFER_TOO_SMALL) )
 747         mbedtls_snprintf( buf, buflen, "NET - Buffer is too small to hold the data" );
 748     if( use_ret == -(MBEDTLS_ERR_NET_INVALID_CONTEXT) )
 749         mbedtls_snprintf( buf, buflen, "NET - The context is invalid, eg because it was free()ed" );
 750 #endif /* MBEDTLS_NET_C */
 751
 752 #if defined(MBEDTLS_OID_C)
 753     if( use_ret == -(MBEDTLS_ERR_OID_NOT_FOUND) )
 754         mbedtls_snprintf( buf, buflen, "OID - OID is not found" );
 755     if( use_ret == -(MBEDTLS_ERR_OID_BUF_TOO_SMALL) )
 756         mbedtls_snprintf( buf, buflen, "OID - output buffer is too small" );
 757 #endif /* MBEDTLS_OID_C */
 758
 759 #if defined(MBEDTLS_PADLOCK_C)
 760     if( use_ret == -(MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED) )
 761         mbedtls_snprintf( buf, buflen, "PADLOCK - Input data should be aligned" );
 762 #endif /* MBEDTLS_PADLOCK_C */
 763
 764 #if defined(MBEDTLS_RIPEMD160_C)
 765     if( use_ret == -(MBEDTLS_ERR_RIPEMD160_HW_ACCEL_FAILED) )
 766         mbedtls_snprintf( buf, buflen, "RIPEMD160 - RIPEMD160 hardware accelerator failed" );
 767 #endif /* MBEDTLS_RIPEMD160_C */
 768
 769 #if defined(MBEDTLS_SHA1_C)
 770     if( use_ret == -(MBEDTLS_ERR_SHA1_HW_ACCEL_FAILED) )
 771         mbedtls_snprintf( buf, buflen, "SHA1 - SHA-1 hardware accelerator failed" );
 772 #endif /* MBEDTLS_SHA1_C */
 773
 774 #if defined(MBEDTLS_SHA256_C)
 775     if( use_ret == -(MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED) )
 776         mbedtls_snprintf( buf, buflen, "SHA256 - SHA-256 hardware accelerator failed" );
 777 #endif /* MBEDTLS_SHA256_C */
 778
 779 #if defined(MBEDTLS_SHA512_C)
 780     if( use_ret == -(MBEDTLS_ERR_SHA512_HW_ACCEL_FAILED) )
 781         mbedtls_snprintf( buf, buflen, "SHA512 - SHA-512 hardware accelerator failed" );
 782 #endif /* MBEDTLS_SHA512_C */
 783
 784 #if defined(MBEDTLS_THREADING_C)
 785     if( use_ret == -(MBEDTLS_ERR_THREADING_FEATURE_UNAVAILABLE) )
 786         mbedtls_snprintf( buf, buflen, "THREADING - The selected feature is not available" );
 787     if( use_ret == -(MBEDTLS_ERR_THREADING_BAD_INPUT_DATA) )
 788         mbedtls_snprintf( buf, buflen, "THREADING - Bad input parameters to function" );
 789     if( use_ret == -(MBEDTLS_ERR_THREADING_MUTEX_ERROR) )
 790         mbedtls_snprintf( buf, buflen, "THREADING - Locking / unlocking / free failed with error code" );
 791 #endif /* MBEDTLS_THREADING_C */
 792
 793 #if defined(MBEDTLS_XTEA_C)
 794     if( use_ret == -(MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH) )
 795         mbedtls_snprintf( buf, buflen, "XTEA - The data input has an invalid length" );
 796     if( use_ret == -(MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED) )
 797         mbedtls_snprintf( buf, buflen, "XTEA - XTEA hardware accelerator failed" );
 798 #endif /* MBEDTLS_XTEA_C */
 799     // END generated code
 800
 801     if( strlen( buf ) != 0 )
 802         return;
 803
 804     mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
 805 }
 806
 807 #else /* MBEDTLS_ERROR_C */
 808
 809 #if defined(MBEDTLS_ERROR_STRERROR_DUMMY)
 810
 811 /*
 812  * Provide an non-function in case MBEDTLS_ERROR_C is not defined
 813  */
 814 void mbedtls_strerror( int ret, char *buf, size_t buflen )
 815 {
 816     ((void) ret);
 817
 818     if( buflen > 0 )
 819         buf[0] = '\0';
 820 }
 821
 822 #endif /* MBEDTLS_ERROR_STRERROR_DUMMY */
 823
 824 #endif /* MBEDTLS_ERROR_C */