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  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_ARIA_C)
  55. #include "mbedtls/aria.h"
  56. #endif
  57.  
  58. #if defined(MBEDTLS_BASE64_C)
  59. #include "mbedtls/base64.h"
  60. #endif
  61.  
  62. #if defined(MBEDTLS_BIGNUM_C)
  63. #include "mbedtls/bignum.h"
  64. #endif
  65.  
  66. #if defined(MBEDTLS_BLOWFISH_C)
  67. #include "mbedtls/blowfish.h"
  68. #endif
  69.  
  70. #if defined(MBEDTLS_CAMELLIA_C)
  71. #include "mbedtls/camellia.h"
  72. #endif
  73.  
  74. #if defined(MBEDTLS_CCM_C)
  75. #include "mbedtls/ccm.h"
  76. #endif
  77.  
  78. #if defined(MBEDTLS_CHACHA20_C)
  79. #include "mbedtls/chacha20.h"
  80. #endif
  81.  
  82. #if defined(MBEDTLS_CHACHAPOLY_C)
  83. #include "mbedtls/chachapoly.h"
  84. #endif
  85.  
  86. #if defined(MBEDTLS_CIPHER_C)
  87. #include "mbedtls/cipher.h"
  88. #endif
  89.  
  90. #if defined(MBEDTLS_CMAC_C)
  91. #include "mbedtls/cmac.h"
  92. #endif
  93.  
  94. #if defined(MBEDTLS_CTR_DRBG_C)
  95. #include "mbedtls/ctr_drbg.h"
  96. #endif
  97.  
  98. #if defined(MBEDTLS_DES_C)
  99. #include "mbedtls/des.h"
  100. #endif
  101.  
  102. #if defined(MBEDTLS_DHM_C)
  103. #include "mbedtls/dhm.h"
  104. #endif
  105.  
  106. #if defined(MBEDTLS_ECP_C)
  107. #include "mbedtls/ecp.h"
  108. #endif
  109.  
  110. #if defined(MBEDTLS_ENTROPY_C)
  111. #include "mbedtls/entropy.h"
  112. #endif
  113.  
  114. #if defined(MBEDTLS_GCM_C)
  115. #include "mbedtls/gcm.h"
  116. #endif
  117.  
  118. #if defined(MBEDTLS_HKDF_C)
  119. #include "mbedtls/hkdf.h"
  120. #endif
  121.  
  122. #if defined(MBEDTLS_HMAC_DRBG_C)
  123. #include "mbedtls/hmac_drbg.h"
  124. #endif
  125.  
  126. #if defined(MBEDTLS_MD_C)
  127. #include "mbedtls/md.h"
  128. #endif
  129.  
  130. #if defined(MBEDTLS_MD2_C)
  131. #include "mbedtls/md2.h"
  132. #endif
  133.  
  134. #if defined(MBEDTLS_MD4_C)
  135. #include "mbedtls/md4.h"
  136. #endif
  137.  
  138. #if defined(MBEDTLS_MD5_C)
  139. #include "mbedtls/md5.h"
  140. #endif
  141.  
  142. #if defined(MBEDTLS_NET_C)
  143. #include "mbedtls/net_sockets.h"
  144. #endif
  145.  
  146. #if defined(MBEDTLS_OID_C)
  147. #include "mbedtls/oid.h"
  148. #endif
  149.  
  150. #if defined(MBEDTLS_PADLOCK_C)
  151. #include "mbedtls/padlock.h"
  152. #endif
  153.  
  154. #if defined(MBEDTLS_PEM_PARSE_C) || defined(MBEDTLS_PEM_WRITE_C)
  155. #include "mbedtls/pem.h"
  156. #endif
  157.  
  158. #if defined(MBEDTLS_PK_C)
  159. #include "mbedtls/pk.h"
  160. #endif
  161.  
  162. #if defined(MBEDTLS_PKCS12_C)
  163. #include "mbedtls/pkcs12.h"
  164. #endif
  165.  
  166. #if defined(MBEDTLS_PKCS5_C)
  167. #include "mbedtls/pkcs5.h"
  168. #endif
  169.  
  170. #if defined(MBEDTLS_PLATFORM_C)
  171. #include "mbedtls/platform.h"
  172. #endif
  173.  
  174. #if defined(MBEDTLS_POLY1305_C)
  175. #include "mbedtls/poly1305.h"
  176. #endif
  177.  
  178. #if defined(MBEDTLS_RIPEMD160_C)
  179. #include "mbedtls/ripemd160.h"
  180. #endif
  181.  
  182. #if defined(MBEDTLS_RSA_C)
  183. #include "mbedtls/rsa.h"
  184. #endif
  185.  
  186. #if defined(MBEDTLS_SHA1_C)
  187. #include "mbedtls/sha1.h"
  188. #endif
  189.  
  190. #if defined(MBEDTLS_SHA256_C)
  191. #include "mbedtls/sha256.h"
  192. #endif
  193.  
  194. #if defined(MBEDTLS_SHA512_C)
  195. #include "mbedtls/sha512.h"
  196. #endif
  197.  
  198. #if defined(MBEDTLS_SSL_TLS_C)
  199. #include "mbedtls/ssl.h"
  200. #endif
  201.  
  202. #if defined(MBEDTLS_THREADING_C)
  203. #include "mbedtls/threading.h"
  204. #endif
  205.  
  206. #if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)
  207. #include "mbedtls/x509.h"
  208. #endif
  209.  
  210. #if defined(MBEDTLS_XTEA_C)
  211. #include "mbedtls/xtea.h"
  212. #endif
  213.  
  214.  
  215. void mbedtls_strerror( int ret, char *buf, size_t buflen )
  216. {
  217.     size_t len;
  218.     int use_ret;
  219.  
  220.     if( buflen == 0 )
  221.         return;
  222.  
  223.     memset( buf, 0x00, buflen );
  224.  
  225.     if( ret < 0 )
  226.         ret = -ret;
  227.  
  228.     if( ret & 0xFF80 )
  229.     {
  230.         use_ret = ret & 0xFF80;
  231.  
  232.         // High level error codes
  233.         //
  234.         // BEGIN generated code
  235. #if defined(MBEDTLS_CIPHER_C)
  236.         if( use_ret == -(MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE) )
  237.             mbedtls_snprintf( buf, buflen, "CIPHER - The selected feature is not available" );
  238.         if( use_ret == -(MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA) )
  239.             mbedtls_snprintf( buf, buflen, "CIPHER - Bad input parameters" );
  240.         if( use_ret == -(MBEDTLS_ERR_CIPHER_ALLOC_FAILED) )
  241.             mbedtls_snprintf( buf, buflen, "CIPHER - Failed to allocate memory" );
  242.         if( use_ret == -(MBEDTLS_ERR_CIPHER_INVALID_PADDING) )
  243.             mbedtls_snprintf( buf, buflen, "CIPHER - Input data contains invalid padding and is rejected" );
  244.         if( use_ret == -(MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED) )
  245.             mbedtls_snprintf( buf, buflen, "CIPHER - Decryption of block requires a full block" );
  246.         if( use_ret == -(MBEDTLS_ERR_CIPHER_AUTH_FAILED) )
  247.             mbedtls_snprintf( buf, buflen, "CIPHER - Authentication failed (for AEAD modes)" );
  248.         if( use_ret == -(MBEDTLS_ERR_CIPHER_INVALID_CONTEXT) )
  249.             mbedtls_snprintf( buf, buflen, "CIPHER - The context is invalid. For example, because it was freed" );
  250.         if( use_ret == -(MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED) )
  251.             mbedtls_snprintf( buf, buflen, "CIPHER - Cipher hardware accelerator failed" );
  252. #endif /* MBEDTLS_CIPHER_C */
  253.  
  254. #if defined(MBEDTLS_DHM_C)
  255.         if( use_ret == -(MBEDTLS_ERR_DHM_BAD_INPUT_DATA) )
  256.             mbedtls_snprintf( buf, buflen, "DHM - Bad input parameters" );
  257.         if( use_ret == -(MBEDTLS_ERR_DHM_READ_PARAMS_FAILED) )
  258.             mbedtls_snprintf( buf, buflen, "DHM - Reading of the DHM parameters failed" );
  259.         if( use_ret == -(MBEDTLS_ERR_DHM_MAKE_PARAMS_FAILED) )
  260.             mbedtls_snprintf( buf, buflen, "DHM - Making of the DHM parameters failed" );
  261.         if( use_ret == -(MBEDTLS_ERR_DHM_READ_PUBLIC_FAILED) )
  262.             mbedtls_snprintf( buf, buflen, "DHM - Reading of the public values failed" );
  263.         if( use_ret == -(MBEDTLS_ERR_DHM_MAKE_PUBLIC_FAILED) )
  264.             mbedtls_snprintf( buf, buflen, "DHM - Making of the public value failed" );
  265.         if( use_ret == -(MBEDTLS_ERR_DHM_CALC_SECRET_FAILED) )
  266.             mbedtls_snprintf( buf, buflen, "DHM - Calculation of the DHM secret failed" );
  267.         if( use_ret == -(MBEDTLS_ERR_DHM_INVALID_FORMAT) )
  268.             mbedtls_snprintf( buf, buflen, "DHM - The ASN.1 data is not formatted correctly" );
  269.         if( use_ret == -(MBEDTLS_ERR_DHM_ALLOC_FAILED) )
  270.             mbedtls_snprintf( buf, buflen, "DHM - Allocation of memory failed" );
  271.         if( use_ret == -(MBEDTLS_ERR_DHM_FILE_IO_ERROR) )
  272.             mbedtls_snprintf( buf, buflen, "DHM - Read or write of file failed" );
  273.         if( use_ret == -(MBEDTLS_ERR_DHM_HW_ACCEL_FAILED) )
  274.             mbedtls_snprintf( buf, buflen, "DHM - DHM hardware accelerator failed" );
  275.         if( use_ret == -(MBEDTLS_ERR_DHM_SET_GROUP_FAILED) )
  276.             mbedtls_snprintf( buf, buflen, "DHM - Setting the modulus and generator failed" );
  277. #endif /* MBEDTLS_DHM_C */
  278.  
  279. #if defined(MBEDTLS_ECP_C)
  280.         if( use_ret == -(MBEDTLS_ERR_ECP_BAD_INPUT_DATA) )
  281.             mbedtls_snprintf( buf, buflen, "ECP - Bad input parameters to function" );
  282.         if( use_ret == -(MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL) )
  283.             mbedtls_snprintf( buf, buflen, "ECP - The buffer is too small to write to" );
  284.         if( use_ret == -(MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE) )
  285.             mbedtls_snprintf( buf, buflen, "ECP - The requested feature is not available, for example, the requested curve is not supported" );
  286.         if( use_ret == -(MBEDTLS_ERR_ECP_VERIFY_FAILED) )
  287.             mbedtls_snprintf( buf, buflen, "ECP - The signature is not valid" );
  288.         if( use_ret == -(MBEDTLS_ERR_ECP_ALLOC_FAILED) )
  289.             mbedtls_snprintf( buf, buflen, "ECP - Memory allocation failed" );
  290.         if( use_ret == -(MBEDTLS_ERR_ECP_RANDOM_FAILED) )
  291.             mbedtls_snprintf( buf, buflen, "ECP - Generation of random value, such as ephemeral key, failed" );
  292.         if( use_ret == -(MBEDTLS_ERR_ECP_INVALID_KEY) )
  293.             mbedtls_snprintf( buf, buflen, "ECP - Invalid private or public key" );
  294.         if( use_ret == -(MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) )
  295.             mbedtls_snprintf( buf, buflen, "ECP - The buffer contains a valid signature followed by more data" );
  296.         if( use_ret == -(MBEDTLS_ERR_ECP_HW_ACCEL_FAILED) )
  297.             mbedtls_snprintf( buf, buflen, "ECP - The ECP hardware accelerator failed" );
  298.         if( use_ret == -(MBEDTLS_ERR_ECP_IN_PROGRESS) )
  299.             mbedtls_snprintf( buf, buflen, "ECP - Operation in progress, call again with the same parameters to continue" );
  300. #endif /* MBEDTLS_ECP_C */
  301.  
  302. #if defined(MBEDTLS_MD_C)
  303.         if( use_ret == -(MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE) )
  304.             mbedtls_snprintf( buf, buflen, "MD - The selected feature is not available" );
  305.         if( use_ret == -(MBEDTLS_ERR_MD_BAD_INPUT_DATA) )
  306.             mbedtls_snprintf( buf, buflen, "MD - Bad input parameters to function" );
  307.         if( use_ret == -(MBEDTLS_ERR_MD_ALLOC_FAILED) )
  308.             mbedtls_snprintf( buf, buflen, "MD - Failed to allocate memory" );
  309.         if( use_ret == -(MBEDTLS_ERR_MD_FILE_IO_ERROR) )
  310.             mbedtls_snprintf( buf, buflen, "MD - Opening or reading of file failed" );
  311.         if( use_ret == -(MBEDTLS_ERR_MD_HW_ACCEL_FAILED) )
  312.             mbedtls_snprintf( buf, buflen, "MD - MD hardware accelerator failed" );
  313. #endif /* MBEDTLS_MD_C */
  314.  
  315. #if defined(MBEDTLS_PEM_PARSE_C) || defined(MBEDTLS_PEM_WRITE_C)
  316.         if( use_ret == -(MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) )
  317.             mbedtls_snprintf( buf, buflen, "PEM - No PEM header or footer found" );
  318.         if( use_ret == -(MBEDTLS_ERR_PEM_INVALID_DATA) )
  319.             mbedtls_snprintf( buf, buflen, "PEM - PEM string is not as expected" );
  320.         if( use_ret == -(MBEDTLS_ERR_PEM_ALLOC_FAILED) )
  321.             mbedtls_snprintf( buf, buflen, "PEM - Failed to allocate memory" );
  322.         if( use_ret == -(MBEDTLS_ERR_PEM_INVALID_ENC_IV) )
  323.             mbedtls_snprintf( buf, buflen, "PEM - RSA IV is not in hex-format" );
  324.         if( use_ret == -(MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG) )
  325.             mbedtls_snprintf( buf, buflen, "PEM - Unsupported key encryption algorithm" );
  326.         if( use_ret == -(MBEDTLS_ERR_PEM_PASSWORD_REQUIRED) )
  327.             mbedtls_snprintf( buf, buflen, "PEM - Private key password can't be empty" );
  328.         if( use_ret == -(MBEDTLS_ERR_PEM_PASSWORD_MISMATCH) )
  329.             mbedtls_snprintf( buf, buflen, "PEM - Given private key password does not allow for correct decryption" );
  330.         if( use_ret == -(MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE) )
  331.             mbedtls_snprintf( buf, buflen, "PEM - Unavailable feature, e.g. hashing/encryption combination" );
  332.         if( use_ret == -(MBEDTLS_ERR_PEM_BAD_INPUT_DATA) )
  333.             mbedtls_snprintf( buf, buflen, "PEM - Bad input parameters to function" );
  334. #endif /* MBEDTLS_PEM_PARSE_C || MBEDTLS_PEM_WRITE_C */
  335.  
  336. #if defined(MBEDTLS_PK_C)
  337.         if( use_ret == -(MBEDTLS_ERR_PK_ALLOC_FAILED) )
  338.             mbedtls_snprintf( buf, buflen, "PK - Memory allocation failed" );
  339.         if( use_ret == -(MBEDTLS_ERR_PK_TYPE_MISMATCH) )
  340.             mbedtls_snprintf( buf, buflen, "PK - Type mismatch, eg attempt to encrypt with an ECDSA key" );
  341.         if( use_ret == -(MBEDTLS_ERR_PK_BAD_INPUT_DATA) )
  342.             mbedtls_snprintf( buf, buflen, "PK - Bad input parameters to function" );
  343.         if( use_ret == -(MBEDTLS_ERR_PK_FILE_IO_ERROR) )
  344.             mbedtls_snprintf( buf, buflen, "PK - Read/write of file failed" );
  345.         if( use_ret == -(MBEDTLS_ERR_PK_KEY_INVALID_VERSION) )
  346.             mbedtls_snprintf( buf, buflen, "PK - Unsupported key version" );
  347.         if( use_ret == -(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT) )
  348.             mbedtls_snprintf( buf, buflen, "PK - Invalid key tag or value" );
  349.         if( use_ret == -(MBEDTLS_ERR_PK_UNKNOWN_PK_ALG) )
  350.             mbedtls_snprintf( buf, buflen, "PK - Key algorithm is unsupported (only RSA and EC are supported)" );
  351.         if( use_ret == -(MBEDTLS_ERR_PK_PASSWORD_REQUIRED) )
  352.             mbedtls_snprintf( buf, buflen, "PK - Private key password can't be empty" );
  353.         if( use_ret == -(MBEDTLS_ERR_PK_PASSWORD_MISMATCH) )
  354.             mbedtls_snprintf( buf, buflen, "PK - Given private key password does not allow for correct decryption" );
  355.         if( use_ret == -(MBEDTLS_ERR_PK_INVALID_PUBKEY) )
  356.             mbedtls_snprintf( buf, buflen, "PK - The pubkey tag or value is invalid (only RSA and EC are supported)" );
  357.         if( use_ret == -(MBEDTLS_ERR_PK_INVALID_ALG) )
  358.             mbedtls_snprintf( buf, buflen, "PK - The algorithm tag or value is invalid" );
  359.         if( use_ret == -(MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE) )
  360.             mbedtls_snprintf( buf, buflen, "PK - Elliptic curve is unsupported (only NIST curves are supported)" );
  361.         if( use_ret == -(MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE) )
  362.             mbedtls_snprintf( buf, buflen, "PK - Unavailable feature, e.g. RSA disabled for RSA key" );
  363.         if( use_ret == -(MBEDTLS_ERR_PK_SIG_LEN_MISMATCH) )
  364.             mbedtls_snprintf( buf, buflen, "PK - The buffer contains a valid signature followed by more data" );
  365.         if( use_ret == -(MBEDTLS_ERR_PK_HW_ACCEL_FAILED) )
  366.             mbedtls_snprintf( buf, buflen, "PK - PK hardware accelerator failed" );
  367. #endif /* MBEDTLS_PK_C */
  368.  
  369. #if defined(MBEDTLS_PKCS12_C)
  370.         if( use_ret == -(MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA) )
  371.             mbedtls_snprintf( buf, buflen, "PKCS12 - Bad input parameters to function" );
  372.         if( use_ret == -(MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE) )
  373.             mbedtls_snprintf( buf, buflen, "PKCS12 - Feature not available, e.g. unsupported encryption scheme" );
  374.         if( use_ret == -(MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT) )
  375.             mbedtls_snprintf( buf, buflen, "PKCS12 - PBE ASN.1 data not as expected" );
  376.         if( use_ret == -(MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH) )
  377.             mbedtls_snprintf( buf, buflen, "PKCS12 - Given private key password does not allow for correct decryption" );
  378. #endif /* MBEDTLS_PKCS12_C */
  379.  
  380. #if defined(MBEDTLS_PKCS5_C)
  381.         if( use_ret == -(MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA) )
  382.             mbedtls_snprintf( buf, buflen, "PKCS5 - Bad input parameters to function" );
  383.         if( use_ret == -(MBEDTLS_ERR_PKCS5_INVALID_FORMAT) )
  384.             mbedtls_snprintf( buf, buflen, "PKCS5 - Unexpected ASN.1 data" );
  385.         if( use_ret == -(MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE) )
  386.             mbedtls_snprintf( buf, buflen, "PKCS5 - Requested encryption or digest alg not available" );
  387.         if( use_ret == -(MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH) )
  388.             mbedtls_snprintf( buf, buflen, "PKCS5 - Given private key password does not allow for correct decryption" );
  389. #endif /* MBEDTLS_PKCS5_C */
  390.  
  391. #if defined(MBEDTLS_RSA_C)
  392.         if( use_ret == -(MBEDTLS_ERR_RSA_BAD_INPUT_DATA) )
  393.             mbedtls_snprintf( buf, buflen, "RSA - Bad input parameters to function" );
  394.         if( use_ret == -(MBEDTLS_ERR_RSA_INVALID_PADDING) )
  395.             mbedtls_snprintf( buf, buflen, "RSA - Input data contains invalid padding and is rejected" );
  396.         if( use_ret == -(MBEDTLS_ERR_RSA_KEY_GEN_FAILED) )
  397.             mbedtls_snprintf( buf, buflen, "RSA - Something failed during generation of a key" );
  398.         if( use_ret == -(MBEDTLS_ERR_RSA_KEY_CHECK_FAILED) )
  399.             mbedtls_snprintf( buf, buflen, "RSA - Key failed to pass the validity check of the library" );
  400.         if( use_ret == -(MBEDTLS_ERR_RSA_PUBLIC_FAILED) )
  401.             mbedtls_snprintf( buf, buflen, "RSA - The public key operation failed" );
  402.         if( use_ret == -(MBEDTLS_ERR_RSA_PRIVATE_FAILED) )
  403.             mbedtls_snprintf( buf, buflen, "RSA - The private key operation failed" );
  404.         if( use_ret == -(MBEDTLS_ERR_RSA_VERIFY_FAILED) )
  405.             mbedtls_snprintf( buf, buflen, "RSA - The PKCS#1 verification failed" );
  406.         if( use_ret == -(MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE) )
  407.             mbedtls_snprintf( buf, buflen, "RSA - The output buffer for decryption is not large enough" );
  408.         if( use_ret == -(MBEDTLS_ERR_RSA_RNG_FAILED) )
  409.             mbedtls_snprintf( buf, buflen, "RSA - The random generator failed to generate non-zeros" );
  410.         if( use_ret == -(MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION) )
  411.             mbedtls_snprintf( buf, buflen, "RSA - The implementation does not offer the requested operation, for example, because of security violations or lack of functionality" );
  412.         if( use_ret == -(MBEDTLS_ERR_RSA_HW_ACCEL_FAILED) )
  413.             mbedtls_snprintf( buf, buflen, "RSA - RSA hardware accelerator failed" );
  414. #endif /* MBEDTLS_RSA_C */
  415.  
  416. #if defined(MBEDTLS_SSL_TLS_C)
  417.         if( use_ret == -(MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE) )
  418.             mbedtls_snprintf( buf, buflen, "SSL - The requested feature is not available" );
  419.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_INPUT_DATA) )
  420.             mbedtls_snprintf( buf, buflen, "SSL - Bad input parameters to function" );
  421.         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_MAC) )
  422.             mbedtls_snprintf( buf, buflen, "SSL - Verification of the message MAC failed" );
  423.         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_RECORD) )
  424.             mbedtls_snprintf( buf, buflen, "SSL - An invalid SSL record was received" );
  425.         if( use_ret == -(MBEDTLS_ERR_SSL_CONN_EOF) )
  426.             mbedtls_snprintf( buf, buflen, "SSL - The connection indicated an EOF" );
  427.         if( use_ret == -(MBEDTLS_ERR_SSL_UNKNOWN_CIPHER) )
  428.             mbedtls_snprintf( buf, buflen, "SSL - An unknown cipher was received" );
  429.         if( use_ret == -(MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN) )
  430.             mbedtls_snprintf( buf, buflen, "SSL - The server has no ciphersuites in common with the client" );
  431.         if( use_ret == -(MBEDTLS_ERR_SSL_NO_RNG) )
  432.             mbedtls_snprintf( buf, buflen, "SSL - No RNG was provided to the SSL module" );
  433.         if( use_ret == -(MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE) )
  434.             mbedtls_snprintf( buf, buflen, "SSL - No client certification received from the client, but required by the authentication mode" );
  435.         if( use_ret == -(MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE) )
  436.             mbedtls_snprintf( buf, buflen, "SSL - Our own certificate(s) is/are too large to send in an SSL message" );
  437.         if( use_ret == -(MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED) )
  438.             mbedtls_snprintf( buf, buflen, "SSL - The own certificate is not set, but needed by the server" );
  439.         if( use_ret == -(MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED) )
  440.             mbedtls_snprintf( buf, buflen, "SSL - The own private key or pre-shared key is not set, but needed" );
  441.         if( use_ret == -(MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED) )
  442.             mbedtls_snprintf( buf, buflen, "SSL - No CA Chain is set, but required to operate" );
  443.         if( use_ret == -(MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE) )
  444.             mbedtls_snprintf( buf, buflen, "SSL - An unexpected message was received from our peer" );
  445.         if( use_ret == -(MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE) )
  446.         {
  447.             mbedtls_snprintf( buf, buflen, "SSL - A fatal alert message was received from our peer" );
  448.             return;
  449.         }
  450.         if( use_ret == -(MBEDTLS_ERR_SSL_PEER_VERIFY_FAILED) )
  451.             mbedtls_snprintf( buf, buflen, "SSL - Verification of our peer failed" );
  452.         if( use_ret == -(MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) )
  453.             mbedtls_snprintf( buf, buflen, "SSL - The peer notified us that the connection is going to be closed" );
  454.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO) )
  455.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientHello handshake message failed" );
  456.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO) )
  457.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerHello handshake message failed" );
  458.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE) )
  459.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the Certificate handshake message failed" );
  460.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST) )
  461.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the CertificateRequest handshake message failed" );
  462.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE) )
  463.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerKeyExchange handshake message failed" );
  464.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE) )
  465.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerHelloDone handshake message failed" );
  466.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE) )
  467.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed" );
  468.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP) )
  469.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Read Public" );
  470.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS) )
  471.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Calculate Secret" );
  472.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY) )
  473.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the CertificateVerify handshake message failed" );
  474.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC) )
  475.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ChangeCipherSpec handshake message failed" );
  476.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_FINISHED) )
  477.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the Finished handshake message failed" );
  478.         if( use_ret == -(MBEDTLS_ERR_SSL_ALLOC_FAILED) )
  479.             mbedtls_snprintf( buf, buflen, "SSL - Memory allocation failed" );
  480.         if( use_ret == -(MBEDTLS_ERR_SSL_HW_ACCEL_FAILED) )
  481.             mbedtls_snprintf( buf, buflen, "SSL - Hardware acceleration function returned with error" );
  482.         if( use_ret == -(MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH) )
  483.             mbedtls_snprintf( buf, buflen, "SSL - Hardware acceleration function skipped / left alone data" );
  484.         if( use_ret == -(MBEDTLS_ERR_SSL_COMPRESSION_FAILED) )
  485.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the compression / decompression failed" );
  486.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION) )
  487.             mbedtls_snprintf( buf, buflen, "SSL - Handshake protocol not within min/max boundaries" );
  488.         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET) )
  489.             mbedtls_snprintf( buf, buflen, "SSL - Processing of the NewSessionTicket handshake message failed" );
  490.         if( use_ret == -(MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED) )
  491.             mbedtls_snprintf( buf, buflen, "SSL - Session ticket has expired" );
  492.         if( use_ret == -(MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH) )
  493.             mbedtls_snprintf( buf, buflen, "SSL - Public key type mismatch (eg, asked for RSA key exchange and presented EC key)" );
  494.         if( use_ret == -(MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY) )
  495.             mbedtls_snprintf( buf, buflen, "SSL - Unknown identity received (eg, PSK identity)" );
  496.         if( use_ret == -(MBEDTLS_ERR_SSL_INTERNAL_ERROR) )
  497.             mbedtls_snprintf( buf, buflen, "SSL - Internal error (eg, unexpected failure in lower-level module)" );
  498.         if( use_ret == -(MBEDTLS_ERR_SSL_COUNTER_WRAPPING) )
  499.             mbedtls_snprintf( buf, buflen, "SSL - A counter would wrap (eg, too many messages exchanged)" );
  500.         if( use_ret == -(MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO) )
  501.             mbedtls_snprintf( buf, buflen, "SSL - Unexpected message at ServerHello in renegotiation" );
  502.         if( use_ret == -(MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED) )
  503.             mbedtls_snprintf( buf, buflen, "SSL - DTLS client must retry for hello verification" );
  504.         if( use_ret == -(MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL) )
  505.             mbedtls_snprintf( buf, buflen, "SSL - A buffer is too small to receive or write a message" );
  506.         if( use_ret == -(MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE) )
  507.             mbedtls_snprintf( buf, buflen, "SSL - None of the common ciphersuites is usable (eg, no suitable certificate, see debug messages)" );
  508.         if( use_ret == -(MBEDTLS_ERR_SSL_WANT_READ) )
  509.             mbedtls_snprintf( buf, buflen, "SSL - No data of requested type currently available on underlying transport" );
  510.         if( use_ret == -(MBEDTLS_ERR_SSL_WANT_WRITE) )
  511.             mbedtls_snprintf( buf, buflen, "SSL - Connection requires a write call" );
  512.         if( use_ret == -(MBEDTLS_ERR_SSL_TIMEOUT) )
  513.             mbedtls_snprintf( buf, buflen, "SSL - The operation timed out" );
  514.         if( use_ret == -(MBEDTLS_ERR_SSL_CLIENT_RECONNECT) )
  515.             mbedtls_snprintf( buf, buflen, "SSL - The client initiated a reconnect from the same port" );
  516.         if( use_ret == -(MBEDTLS_ERR_SSL_UNEXPECTED_RECORD) )
  517.             mbedtls_snprintf( buf, buflen, "SSL - Record header looks valid but is not expected" );
  518.         if( use_ret == -(MBEDTLS_ERR_SSL_NON_FATAL) )
  519.             mbedtls_snprintf( buf, buflen, "SSL - The alert message received indicates a non-fatal error" );
  520.         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH) )
  521.             mbedtls_snprintf( buf, buflen, "SSL - Couldn't set the hash for verifying CertificateVerify" );
  522.         if( use_ret == -(MBEDTLS_ERR_SSL_CONTINUE_PROCESSING) )
  523.             mbedtls_snprintf( buf, buflen, "SSL - Internal-only message signaling that further message-processing should be done" );
  524.         if( use_ret == -(MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS) )
  525.             mbedtls_snprintf( buf, buflen, "SSL - The asynchronous operation is not completed yet" );
  526.         if( use_ret == -(MBEDTLS_ERR_SSL_EARLY_MESSAGE) )
  527.             mbedtls_snprintf( buf, buflen, "SSL - Internal-only message signaling that a message arrived early" );
  528.         if( use_ret == -(MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) )
  529.             mbedtls_snprintf( buf, buflen, "SSL - A cryptographic operation is in progress. Try again later" );
  530. #endif /* MBEDTLS_SSL_TLS_C */
  531.  
  532. #if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)
  533.         if( use_ret == -(MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE) )
  534.             mbedtls_snprintf( buf, buflen, "X509 - Unavailable feature, e.g. RSA hashing/encryption combination" );
  535.         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_OID) )
  536.             mbedtls_snprintf( buf, buflen, "X509 - Requested OID is unknown" );
  537.         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_FORMAT) )
  538.             mbedtls_snprintf( buf, buflen, "X509 - The CRT/CRL/CSR format is invalid, e.g. different type expected" );
  539.         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_VERSION) )
  540.             mbedtls_snprintf( buf, buflen, "X509 - The CRT/CRL/CSR version element is invalid" );
  541.         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_SERIAL) )
  542.             mbedtls_snprintf( buf, buflen, "X509 - The serial tag or value is invalid" );
  543.         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_ALG) )
  544.             mbedtls_snprintf( buf, buflen, "X509 - The algorithm tag or value is invalid" );
  545.         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_NAME) )
  546.             mbedtls_snprintf( buf, buflen, "X509 - The name tag or value is invalid" );
  547.         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_DATE) )
  548.             mbedtls_snprintf( buf, buflen, "X509 - The date tag or value is invalid" );
  549.         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_SIGNATURE) )
  550.             mbedtls_snprintf( buf, buflen, "X509 - The signature tag or value invalid" );
  551.         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_EXTENSIONS) )
  552.             mbedtls_snprintf( buf, buflen, "X509 - The extension tag or value is invalid" );
  553.         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_VERSION) )
  554.             mbedtls_snprintf( buf, buflen, "X509 - CRT/CRL/CSR has an unsupported version number" );
  555.         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG) )
  556.             mbedtls_snprintf( buf, buflen, "X509 - Signature algorithm (oid) is unsupported" );
  557.         if( use_ret == -(MBEDTLS_ERR_X509_SIG_MISMATCH) )
  558.             mbedtls_snprintf( buf, buflen, "X509 - Signature algorithms do not match. (see \\c ::mbedtls_x509_crt sig_oid)" );
  559.         if( use_ret == -(MBEDTLS_ERR_X509_CERT_VERIFY_FAILED) )
  560.             mbedtls_snprintf( buf, buflen, "X509 - Certificate verification failed, e.g. CRL, CA or signature check failed" );
  561.         if( use_ret == -(MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT) )
  562.             mbedtls_snprintf( buf, buflen, "X509 - Format not recognized as DER or PEM" );
  563.         if( use_ret == -(MBEDTLS_ERR_X509_BAD_INPUT_DATA) )
  564.             mbedtls_snprintf( buf, buflen, "X509 - Input invalid" );
  565.         if( use_ret == -(MBEDTLS_ERR_X509_ALLOC_FAILED) )
  566.             mbedtls_snprintf( buf, buflen, "X509 - Allocation of memory failed" );
  567.         if( use_ret == -(MBEDTLS_ERR_X509_FILE_IO_ERROR) )
  568.             mbedtls_snprintf( buf, buflen, "X509 - Read/write of file failed" );
  569.         if( use_ret == -(MBEDTLS_ERR_X509_BUFFER_TOO_SMALL) )
  570.             mbedtls_snprintf( buf, buflen, "X509 - Destination buffer is too small" );
  571.         if( use_ret == -(MBEDTLS_ERR_X509_FATAL_ERROR) )
  572.             mbedtls_snprintf( buf, buflen, "X509 - A fatal error occurred, eg the chain is too long or the vrfy callback failed" );
  573. #endif /* MBEDTLS_X509_USE_C || MBEDTLS_X509_CREATE_C */
  574.         // END generated code
  575.  
  576.         if( strlen( buf ) == 0 )
  577.             mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
  578.     }
  579.  
  580.     use_ret = ret & ~0xFF80;
  581.  
  582.     if( use_ret == 0 )
  583.         return;
  584.  
  585.     // If high level code is present, make a concatenation between both
  586.     // error strings.
  587.     //
  588.     len = strlen( buf );
  589.  
  590.     if( len > 0 )
  591.     {
  592.         if( buflen - len < 5 )
  593.             return;
  594.  
  595.         mbedtls_snprintf( buf + len, buflen - len, " : " );
  596.  
  597.         buf += len + 3;
  598.         buflen -= len + 3;
  599.     }
  600.  
  601.     // Low level error codes
  602.     //
  603.     // BEGIN generated code
  604. #if defined(MBEDTLS_AES_C)
  605.     if( use_ret == -(MBEDTLS_ERR_AES_INVALID_KEY_LENGTH) )
  606.         mbedtls_snprintf( buf, buflen, "AES - Invalid key length" );
  607.     if( use_ret == -(MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH) )
  608.         mbedtls_snprintf( buf, buflen, "AES - Invalid data input length" );
  609.     if( use_ret == -(MBEDTLS_ERR_AES_BAD_INPUT_DATA) )
  610.         mbedtls_snprintf( buf, buflen, "AES - Invalid input data" );
  611.     if( use_ret == -(MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE) )
  612.         mbedtls_snprintf( buf, buflen, "AES - Feature not available. For example, an unsupported AES key size" );
  613.     if( use_ret == -(MBEDTLS_ERR_AES_HW_ACCEL_FAILED) )
  614.         mbedtls_snprintf( buf, buflen, "AES - AES hardware accelerator failed" );
  615. #endif /* MBEDTLS_AES_C */
  616.  
  617. #if defined(MBEDTLS_ARC4_C)
  618.     if( use_ret == -(MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED) )
  619.         mbedtls_snprintf( buf, buflen, "ARC4 - ARC4 hardware accelerator failed" );
  620. #endif /* MBEDTLS_ARC4_C */
  621.  
  622. #if defined(MBEDTLS_ARIA_C)
  623.     if( use_ret == -(MBEDTLS_ERR_ARIA_BAD_INPUT_DATA) )
  624.         mbedtls_snprintf( buf, buflen, "ARIA - Bad input data" );
  625.     if( use_ret == -(MBEDTLS_ERR_ARIA_INVALID_INPUT_LENGTH) )
  626.         mbedtls_snprintf( buf, buflen, "ARIA - Invalid data input length" );
  627.     if( use_ret == -(MBEDTLS_ERR_ARIA_FEATURE_UNAVAILABLE) )
  628.         mbedtls_snprintf( buf, buflen, "ARIA - Feature not available. For example, an unsupported ARIA key size" );
  629.     if( use_ret == -(MBEDTLS_ERR_ARIA_HW_ACCEL_FAILED) )
  630.         mbedtls_snprintf( buf, buflen, "ARIA - ARIA hardware accelerator failed" );
  631. #endif /* MBEDTLS_ARIA_C */
  632.  
  633. #if defined(MBEDTLS_ASN1_PARSE_C)
  634.     if( use_ret == -(MBEDTLS_ERR_ASN1_OUT_OF_DATA) )
  635.         mbedtls_snprintf( buf, buflen, "ASN1 - Out of data when parsing an ASN1 data structure" );
  636.     if( use_ret == -(MBEDTLS_ERR_ASN1_UNEXPECTED_TAG) )
  637.         mbedtls_snprintf( buf, buflen, "ASN1 - ASN1 tag was of an unexpected value" );
  638.     if( use_ret == -(MBEDTLS_ERR_ASN1_INVALID_LENGTH) )
  639.         mbedtls_snprintf( buf, buflen, "ASN1 - Error when trying to determine the length or invalid length" );
  640.     if( use_ret == -(MBEDTLS_ERR_ASN1_LENGTH_MISMATCH) )
  641.         mbedtls_snprintf( buf, buflen, "ASN1 - Actual length differs from expected length" );
  642.     if( use_ret == -(MBEDTLS_ERR_ASN1_INVALID_DATA) )
  643.         mbedtls_snprintf( buf, buflen, "ASN1 - Data is invalid. (not used)" );
  644.     if( use_ret == -(MBEDTLS_ERR_ASN1_ALLOC_FAILED) )
  645.         mbedtls_snprintf( buf, buflen, "ASN1 - Memory allocation failed" );
  646.     if( use_ret == -(MBEDTLS_ERR_ASN1_BUF_TOO_SMALL) )
  647.         mbedtls_snprintf( buf, buflen, "ASN1 - Buffer too small when writing ASN.1 data structure" );
  648. #endif /* MBEDTLS_ASN1_PARSE_C */
  649.  
  650. #if defined(MBEDTLS_BASE64_C)
  651.     if( use_ret == -(MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL) )
  652.         mbedtls_snprintf( buf, buflen, "BASE64 - Output buffer too small" );
  653.     if( use_ret == -(MBEDTLS_ERR_BASE64_INVALID_CHARACTER) )
  654.         mbedtls_snprintf( buf, buflen, "BASE64 - Invalid character in input" );
  655. #endif /* MBEDTLS_BASE64_C */
  656.  
  657. #if defined(MBEDTLS_BIGNUM_C)
  658.     if( use_ret == -(MBEDTLS_ERR_MPI_FILE_IO_ERROR) )
  659.         mbedtls_snprintf( buf, buflen, "BIGNUM - An error occurred while reading from or writing to a file" );
  660.     if( use_ret == -(MBEDTLS_ERR_MPI_BAD_INPUT_DATA) )
  661.         mbedtls_snprintf( buf, buflen, "BIGNUM - Bad input parameters to function" );
  662.     if( use_ret == -(MBEDTLS_ERR_MPI_INVALID_CHARACTER) )
  663.         mbedtls_snprintf( buf, buflen, "BIGNUM - There is an invalid character in the digit string" );
  664.     if( use_ret == -(MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL) )
  665.         mbedtls_snprintf( buf, buflen, "BIGNUM - The buffer is too small to write to" );
  666.     if( use_ret == -(MBEDTLS_ERR_MPI_NEGATIVE_VALUE) )
  667.         mbedtls_snprintf( buf, buflen, "BIGNUM - The input arguments are negative or result in illegal output" );
  668.     if( use_ret == -(MBEDTLS_ERR_MPI_DIVISION_BY_ZERO) )
  669.         mbedtls_snprintf( buf, buflen, "BIGNUM - The input argument for division is zero, which is not allowed" );
  670.     if( use_ret == -(MBEDTLS_ERR_MPI_NOT_ACCEPTABLE) )
  671.         mbedtls_snprintf( buf, buflen, "BIGNUM - The input arguments are not acceptable" );
  672.     if( use_ret == -(MBEDTLS_ERR_MPI_ALLOC_FAILED) )
  673.         mbedtls_snprintf( buf, buflen, "BIGNUM - Memory allocation failed" );
  674. #endif /* MBEDTLS_BIGNUM_C */
  675.  
  676. #if defined(MBEDTLS_BLOWFISH_C)
  677.     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_BAD_INPUT_DATA) )
  678.         mbedtls_snprintf( buf, buflen, "BLOWFISH - Bad input data" );
  679.     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH) )
  680.         mbedtls_snprintf( buf, buflen, "BLOWFISH - Invalid data input length" );
  681.     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED) )
  682.         mbedtls_snprintf( buf, buflen, "BLOWFISH - Blowfish hardware accelerator failed" );
  683. #endif /* MBEDTLS_BLOWFISH_C */
  684.  
  685. #if defined(MBEDTLS_CAMELLIA_C)
  686.     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA) )
  687.         mbedtls_snprintf( buf, buflen, "CAMELLIA - Bad input data" );
  688.     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH) )
  689.         mbedtls_snprintf( buf, buflen, "CAMELLIA - Invalid data input length" );
  690.     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_HW_ACCEL_FAILED) )
  691.         mbedtls_snprintf( buf, buflen, "CAMELLIA - Camellia hardware accelerator failed" );
  692. #endif /* MBEDTLS_CAMELLIA_C */
  693.  
  694. #if defined(MBEDTLS_CCM_C)
  695.     if( use_ret == -(MBEDTLS_ERR_CCM_BAD_INPUT) )
  696.         mbedtls_snprintf( buf, buflen, "CCM - Bad input parameters to the function" );
  697.     if( use_ret == -(MBEDTLS_ERR_CCM_AUTH_FAILED) )
  698.         mbedtls_snprintf( buf, buflen, "CCM - Authenticated decryption failed" );
  699.     if( use_ret == -(MBEDTLS_ERR_CCM_HW_ACCEL_FAILED) )
  700.         mbedtls_snprintf( buf, buflen, "CCM - CCM hardware accelerator failed" );
  701. #endif /* MBEDTLS_CCM_C */
  702.  
  703. #if defined(MBEDTLS_CHACHA20_C)
  704.     if( use_ret == -(MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA) )
  705.         mbedtls_snprintf( buf, buflen, "CHACHA20 - Invalid input parameter(s)" );
  706.     if( use_ret == -(MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE) )
  707.         mbedtls_snprintf( buf, buflen, "CHACHA20 - Feature not available. For example, s part of the API is not implemented" );
  708.     if( use_ret == -(MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED) )
  709.         mbedtls_snprintf( buf, buflen, "CHACHA20 - Chacha20 hardware accelerator failed" );
  710. #endif /* MBEDTLS_CHACHA20_C */
  711.  
  712. #if defined(MBEDTLS_CHACHAPOLY_C)
  713.     if( use_ret == -(MBEDTLS_ERR_CHACHAPOLY_BAD_STATE) )
  714.         mbedtls_snprintf( buf, buflen, "CHACHAPOLY - The requested operation is not permitted in the current state" );
  715.     if( use_ret == -(MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED) )
  716.         mbedtls_snprintf( buf, buflen, "CHACHAPOLY - Authenticated decryption failed: data was not authentic" );
  717. #endif /* MBEDTLS_CHACHAPOLY_C */
  718.  
  719. #if defined(MBEDTLS_CMAC_C)
  720.     if( use_ret == -(MBEDTLS_ERR_CMAC_HW_ACCEL_FAILED) )
  721.         mbedtls_snprintf( buf, buflen, "CMAC - CMAC hardware accelerator failed" );
  722. #endif /* MBEDTLS_CMAC_C */
  723.  
  724. #if defined(MBEDTLS_CTR_DRBG_C)
  725.     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED) )
  726.         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The entropy source failed" );
  727.     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG) )
  728.         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The requested random buffer length is too big" );
  729.     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG) )
  730.         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The input (entropy + additional data) is too large" );
  731.     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR) )
  732.         mbedtls_snprintf( buf, buflen, "CTR_DRBG - Read or write error in file" );
  733. #endif /* MBEDTLS_CTR_DRBG_C */
  734.  
  735. #if defined(MBEDTLS_DES_C)
  736.     if( use_ret == -(MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH) )
  737.         mbedtls_snprintf( buf, buflen, "DES - The data input has an invalid length" );
  738.     if( use_ret == -(MBEDTLS_ERR_DES_HW_ACCEL_FAILED) )
  739.         mbedtls_snprintf( buf, buflen, "DES - DES hardware accelerator failed" );
  740. #endif /* MBEDTLS_DES_C */
  741.  
  742. #if defined(MBEDTLS_ENTROPY_C)
  743.     if( use_ret == -(MBEDTLS_ERR_ENTROPY_SOURCE_FAILED) )
  744.         mbedtls_snprintf( buf, buflen, "ENTROPY - Critical entropy source failure" );
  745.     if( use_ret == -(MBEDTLS_ERR_ENTROPY_MAX_SOURCES) )
  746.         mbedtls_snprintf( buf, buflen, "ENTROPY - No more sources can be added" );
  747.     if( use_ret == -(MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED) )
  748.         mbedtls_snprintf( buf, buflen, "ENTROPY - No sources have been added to poll" );
  749.     if( use_ret == -(MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE) )
  750.         mbedtls_snprintf( buf, buflen, "ENTROPY - No strong sources have been added to poll" );
  751.     if( use_ret == -(MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR) )
  752.         mbedtls_snprintf( buf, buflen, "ENTROPY - Read/write error in file" );
  753. #endif /* MBEDTLS_ENTROPY_C */
  754.  
  755. #if defined(MBEDTLS_GCM_C)
  756.     if( use_ret == -(MBEDTLS_ERR_GCM_AUTH_FAILED) )
  757.         mbedtls_snprintf( buf, buflen, "GCM - Authenticated decryption failed" );
  758.     if( use_ret == -(MBEDTLS_ERR_GCM_HW_ACCEL_FAILED) )
  759.         mbedtls_snprintf( buf, buflen, "GCM - GCM hardware accelerator failed" );
  760.     if( use_ret == -(MBEDTLS_ERR_GCM_BAD_INPUT) )
  761.         mbedtls_snprintf( buf, buflen, "GCM - Bad input parameters to function" );
  762. #endif /* MBEDTLS_GCM_C */
  763.  
  764. #if defined(MBEDTLS_HKDF_C)
  765.     if( use_ret == -(MBEDTLS_ERR_HKDF_BAD_INPUT_DATA) )
  766.         mbedtls_snprintf( buf, buflen, "HKDF - Bad input parameters to function" );
  767. #endif /* MBEDTLS_HKDF_C */
  768.  
  769. #if defined(MBEDTLS_HMAC_DRBG_C)
  770.     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG) )
  771.         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Too many random requested in single call" );
  772.     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG) )
  773.         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Input too large (Entropy + additional)" );
  774.     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR) )
  775.         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Read/write error in file" );
  776.     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED) )
  777.         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - The entropy source failed" );
  778. #endif /* MBEDTLS_HMAC_DRBG_C */
  779.  
  780. #if defined(MBEDTLS_MD2_C)
  781.     if( use_ret == -(MBEDTLS_ERR_MD2_HW_ACCEL_FAILED) )
  782.         mbedtls_snprintf( buf, buflen, "MD2 - MD2 hardware accelerator failed" );
  783. #endif /* MBEDTLS_MD2_C */
  784.  
  785. #if defined(MBEDTLS_MD4_C)
  786.     if( use_ret == -(MBEDTLS_ERR_MD4_HW_ACCEL_FAILED) )
  787.         mbedtls_snprintf( buf, buflen, "MD4 - MD4 hardware accelerator failed" );
  788. #endif /* MBEDTLS_MD4_C */
  789.  
  790. #if defined(MBEDTLS_MD5_C)
  791.     if( use_ret == -(MBEDTLS_ERR_MD5_HW_ACCEL_FAILED) )
  792.         mbedtls_snprintf( buf, buflen, "MD5 - MD5 hardware accelerator failed" );
  793. #endif /* MBEDTLS_MD5_C */
  794.  
  795. #if defined(MBEDTLS_NET_C)
  796.     if( use_ret == -(MBEDTLS_ERR_NET_SOCKET_FAILED) )
  797.         mbedtls_snprintf( buf, buflen, "NET - Failed to open a socket" );
  798.     if( use_ret == -(MBEDTLS_ERR_NET_CONNECT_FAILED) )
  799.         mbedtls_snprintf( buf, buflen, "NET - The connection to the given server / port failed" );
  800.     if( use_ret == -(MBEDTLS_ERR_NET_BIND_FAILED) )
  801.         mbedtls_snprintf( buf, buflen, "NET - Binding of the socket failed" );
  802.     if( use_ret == -(MBEDTLS_ERR_NET_LISTEN_FAILED) )
  803.         mbedtls_snprintf( buf, buflen, "NET - Could not listen on the socket" );
  804.     if( use_ret == -(MBEDTLS_ERR_NET_ACCEPT_FAILED) )
  805.         mbedtls_snprintf( buf, buflen, "NET - Could not accept the incoming connection" );
  806.     if( use_ret == -(MBEDTLS_ERR_NET_RECV_FAILED) )
  807.         mbedtls_snprintf( buf, buflen, "NET - Reading information from the socket failed" );
  808.     if( use_ret == -(MBEDTLS_ERR_NET_SEND_FAILED) )
  809.         mbedtls_snprintf( buf, buflen, "NET - Sending information through the socket failed" );
  810.     if( use_ret == -(MBEDTLS_ERR_NET_CONN_RESET) )
  811.         mbedtls_snprintf( buf, buflen, "NET - Connection was reset by peer" );
  812.     if( use_ret == -(MBEDTLS_ERR_NET_UNKNOWN_HOST) )
  813.         mbedtls_snprintf( buf, buflen, "NET - Failed to get an IP address for the given hostname" );
  814.     if( use_ret == -(MBEDTLS_ERR_NET_BUFFER_TOO_SMALL) )
  815.         mbedtls_snprintf( buf, buflen, "NET - Buffer is too small to hold the data" );
  816.     if( use_ret == -(MBEDTLS_ERR_NET_INVALID_CONTEXT) )
  817.         mbedtls_snprintf( buf, buflen, "NET - The context is invalid, eg because it was free()ed" );
  818.     if( use_ret == -(MBEDTLS_ERR_NET_POLL_FAILED) )
  819.         mbedtls_snprintf( buf, buflen, "NET - Polling the net context failed" );
  820.     if( use_ret == -(MBEDTLS_ERR_NET_BAD_INPUT_DATA) )
  821.         mbedtls_snprintf( buf, buflen, "NET - Input invalid" );
  822. #endif /* MBEDTLS_NET_C */
  823.  
  824. #if defined(MBEDTLS_OID_C)
  825.     if( use_ret == -(MBEDTLS_ERR_OID_NOT_FOUND) )
  826.         mbedtls_snprintf( buf, buflen, "OID - OID is not found" );
  827.     if( use_ret == -(MBEDTLS_ERR_OID_BUF_TOO_SMALL) )
  828.         mbedtls_snprintf( buf, buflen, "OID - output buffer is too small" );
  829. #endif /* MBEDTLS_OID_C */
  830.  
  831. #if defined(MBEDTLS_PADLOCK_C)
  832.     if( use_ret == -(MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED) )
  833.         mbedtls_snprintf( buf, buflen, "PADLOCK - Input data should be aligned" );
  834. #endif /* MBEDTLS_PADLOCK_C */
  835.  
  836. #if defined(MBEDTLS_PLATFORM_C)
  837.     if( use_ret == -(MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED) )
  838.         mbedtls_snprintf( buf, buflen, "PLATFORM - Hardware accelerator failed" );
  839.     if( use_ret == -(MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED) )
  840.         mbedtls_snprintf( buf, buflen, "PLATFORM - The requested feature is not supported by the platform" );
  841. #endif /* MBEDTLS_PLATFORM_C */
  842.  
  843. #if defined(MBEDTLS_POLY1305_C)
  844.     if( use_ret == -(MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA) )
  845.         mbedtls_snprintf( buf, buflen, "POLY1305 - Invalid input parameter(s)" );
  846.     if( use_ret == -(MBEDTLS_ERR_POLY1305_FEATURE_UNAVAILABLE) )
  847.         mbedtls_snprintf( buf, buflen, "POLY1305 - Feature not available. For example, s part of the API is not implemented" );
  848.     if( use_ret == -(MBEDTLS_ERR_POLY1305_HW_ACCEL_FAILED) )
  849.         mbedtls_snprintf( buf, buflen, "POLY1305 - Poly1305 hardware accelerator failed" );
  850. #endif /* MBEDTLS_POLY1305_C */
  851.  
  852. #if defined(MBEDTLS_RIPEMD160_C)
  853.     if( use_ret == -(MBEDTLS_ERR_RIPEMD160_HW_ACCEL_FAILED) )
  854.         mbedtls_snprintf( buf, buflen, "RIPEMD160 - RIPEMD160 hardware accelerator failed" );
  855. #endif /* MBEDTLS_RIPEMD160_C */
  856.  
  857. #if defined(MBEDTLS_SHA1_C)
  858.     if( use_ret == -(MBEDTLS_ERR_SHA1_HW_ACCEL_FAILED) )
  859.         mbedtls_snprintf( buf, buflen, "SHA1 - SHA-1 hardware accelerator failed" );
  860.     if( use_ret == -(MBEDTLS_ERR_SHA1_BAD_INPUT_DATA) )
  861.         mbedtls_snprintf( buf, buflen, "SHA1 - SHA-1 input data was malformed" );
  862. #endif /* MBEDTLS_SHA1_C */
  863.  
  864. #if defined(MBEDTLS_SHA256_C)
  865.     if( use_ret == -(MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED) )
  866.         mbedtls_snprintf( buf, buflen, "SHA256 - SHA-256 hardware accelerator failed" );
  867.     if( use_ret == -(MBEDTLS_ERR_SHA256_BAD_INPUT_DATA) )
  868.         mbedtls_snprintf( buf, buflen, "SHA256 - SHA-256 input data was malformed" );
  869. #endif /* MBEDTLS_SHA256_C */
  870.  
  871. #if defined(MBEDTLS_SHA512_C)
  872.     if( use_ret == -(MBEDTLS_ERR_SHA512_HW_ACCEL_FAILED) )
  873.         mbedtls_snprintf( buf, buflen, "SHA512 - SHA-512 hardware accelerator failed" );
  874.     if( use_ret == -(MBEDTLS_ERR_SHA512_BAD_INPUT_DATA) )
  875.         mbedtls_snprintf( buf, buflen, "SHA512 - SHA-512 input data was malformed" );
  876. #endif /* MBEDTLS_SHA512_C */
  877.  
  878. #if defined(MBEDTLS_THREADING_C)
  879.     if( use_ret == -(MBEDTLS_ERR_THREADING_FEATURE_UNAVAILABLE) )
  880.         mbedtls_snprintf( buf, buflen, "THREADING - The selected feature is not available" );
  881.     if( use_ret == -(MBEDTLS_ERR_THREADING_BAD_INPUT_DATA) )
  882.         mbedtls_snprintf( buf, buflen, "THREADING - Bad input parameters to function" );
  883.     if( use_ret == -(MBEDTLS_ERR_THREADING_MUTEX_ERROR) )
  884.         mbedtls_snprintf( buf, buflen, "THREADING - Locking / unlocking / free failed with error code" );
  885. #endif /* MBEDTLS_THREADING_C */
  886.  
  887. #if defined(MBEDTLS_XTEA_C)
  888.     if( use_ret == -(MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH) )
  889.         mbedtls_snprintf( buf, buflen, "XTEA - The data input has an invalid length" );
  890.     if( use_ret == -(MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED) )
  891.         mbedtls_snprintf( buf, buflen, "XTEA - XTEA hardware accelerator failed" );
  892. #endif /* MBEDTLS_XTEA_C */
  893.     // END generated code
  894.  
  895.     if( strlen( buf ) != 0 )
  896.         return;
  897.  
  898.     mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
  899. }
  900.  
  901. #else /* MBEDTLS_ERROR_C */
  902.  
  903. #if defined(MBEDTLS_ERROR_STRERROR_DUMMY)
  904.  
  905. /*
  906.  * Provide an non-function in case MBEDTLS_ERROR_C is not defined
  907.  */
  908. void mbedtls_strerror( int ret, char *buf, size_t buflen )
  909. {
  910.     ((void) ret);
  911.  
  912.     if( buflen > 0 )
  913.         buf[0] = '\0';
  914. }
  915.  
  916. #endif /* MBEDTLS_ERROR_STRERROR_DUMMY */
  917.  
  918. #endif /* MBEDTLS_ERROR_C */
  919.