error.c

00001 /*
00002  *  Error message information
00003  *
00004  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
00005  *  SPDX-License-Identifier: Apache-2.0
00006  *
00007  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
00008  *  not use this file except in compliance with the License.
00009  *  You may obtain a copy of the License at
00010  *
00011  *  http://www.apache.org/licenses/LICENSE-2.0
00012  *
00013  *  Unless required by applicable law or agreed to in writing, software
00014  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00015  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00016  *  See the License for the specific language governing permissions and
00017  *  limitations under the License.
00018  *
00019  *  This file is part of mbed TLS (https://tls.mbed.org)
00020  */
00021 
00022 #if !defined(MBEDTLS_CONFIG_FILE)
00023 #include "mbedtls/config.h"
00024 #else
00025 #include MBEDTLS_CONFIG_FILE
00026 #endif
00027 
00028 #if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
00029 #include "mbedtls/error.h"
00030 #include <string.h>
00031 #endif
00032 
00033 #if defined(MBEDTLS_PLATFORM_C)
00034 #include "mbedtls/platform.h"
00035 #else
00036 #define mbedtls_snprintf snprintf
00037 #define mbedtls_time_t   time_t
00038 #endif
00039 
00040 #if defined(MBEDTLS_ERROR_C)
00041 
00042 #include <stdio.h>
00043 
00044 #if defined(MBEDTLS_AES_C)
00045 #include "mbedtls/aes.h"
00046 #endif
00047 
00048 #if defined(MBEDTLS_BASE64_C)
00049 #include "mbedtls/base64.h"
00050 #endif
00051 
00052 #if defined(MBEDTLS_BIGNUM_C)
00053 #include "mbedtls/bignum.h"
00054 #endif
00055 
00056 #if defined(MBEDTLS_BLOWFISH_C)
00057 #include "mbedtls/blowfish.h"
00058 #endif
00059 
00060 #if defined(MBEDTLS_CAMELLIA_C)
00061 #include "mbedtls/camellia.h"
00062 #endif
00063 
00064 #if defined(MBEDTLS_CCM_C)
00065 #include "mbedtls/ccm.h"
00066 #endif
00067 
00068 #if defined(MBEDTLS_CIPHER_C)
00069 #include "mbedtls/cipher.h"
00070 #endif
00071 
00072 #if defined(MBEDTLS_CTR_DRBG_C)
00073 #include "mbedtls/ctr_drbg.h"
00074 #endif
00075 
00076 #if defined(MBEDTLS_DES_C)
00077 #include "mbedtls/des.h"
00078 #endif
00079 
00080 #if defined(MBEDTLS_DHM_C)
00081 #include "mbedtls/dhm.h"
00082 #endif
00083 
00084 #if defined(MBEDTLS_ECP_C)
00085 #include "mbedtls/ecp.h"
00086 #endif
00087 
00088 #if defined(MBEDTLS_ENTROPY_C)
00089 #include "mbedtls/entropy.h"
00090 #endif
00091 
00092 #if defined(MBEDTLS_GCM_C)
00093 #include "mbedtls/gcm.h"
00094 #endif
00095 
00096 #if defined(MBEDTLS_HMAC_DRBG_C)
00097 #include "mbedtls/hmac_drbg.h"
00098 #endif
00099 
00100 #if defined(MBEDTLS_MD_C)
00101 #include "mbedtls/md.h"
00102 #endif
00103 
00104 #if defined(MBEDTLS_NET_C)
00105 #include "mbedtls/net_sockets.h"
00106 #endif
00107 
00108 #if defined(MBEDTLS_OID_C)
00109 #include "mbedtls/oid.h"
00110 #endif
00111 
00112 #if defined(MBEDTLS_PADLOCK_C)
00113 #include "mbedtls/padlock.h"
00114 #endif
00115 
00116 #if defined(MBEDTLS_PEM_PARSE_C) || defined(MBEDTLS_PEM_WRITE_C)
00117 #include "mbedtls/pem.h"
00118 #endif
00119 
00120 #if defined(MBEDTLS_PK_C)
00121 #include "mbedtls/pk.h"
00122 #endif
00123 
00124 #if defined(MBEDTLS_PKCS12_C)
00125 #include "mbedtls/pkcs12.h"
00126 #endif
00127 
00128 #if defined(MBEDTLS_PKCS5_C)
00129 #include "mbedtls/pkcs5.h"
00130 #endif
00131 
00132 #if defined(MBEDTLS_RSA_C)
00133 #include "mbedtls/rsa.h"
00134 #endif
00135 
00136 #if defined(MBEDTLS_SSL_TLS_C)
00137 #include "mbedtls/ssl.h"
00138 #endif
00139 
00140 #if defined(MBEDTLS_THREADING_C)
00141 #include "mbedtls/threading.h"
00142 #endif
00143 
00144 #if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)
00145 #include "mbedtls/x509.h"
00146 #endif
00147 
00148 #if defined(MBEDTLS_XTEA_C)
00149 #include "mbedtls/xtea.h"
00150 #endif
00151 
00152 
00153 void mbedtls_strerror( int ret, char *buf, size_t buflen )
00154 {
00155     size_t len;
00156     int use_ret;
00157 
00158     if( buflen == 0 )
00159         return;
00160 
00161     memset( buf, 0x00, buflen );
00162 
00163     if( ret < 0 )
00164         ret = -ret;
00165 
00166     if( ret & 0xFF80 )
00167     {
00168         use_ret = ret & 0xFF80;
00169 
00170         // High level error codes
00171         //
00172         // BEGIN generated code
00173 #if defined(MBEDTLS_CIPHER_C)
00174         if( use_ret == -(MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE) )
00175             mbedtls_snprintf( buf, buflen, "CIPHER - The selected feature is not available" );
00176         if( use_ret == -(MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA) )
00177             mbedtls_snprintf( buf, buflen, "CIPHER - Bad input parameters to function" );
00178         if( use_ret == -(MBEDTLS_ERR_CIPHER_ALLOC_FAILED) )
00179             mbedtls_snprintf( buf, buflen, "CIPHER - Failed to allocate memory" );
00180         if( use_ret == -(MBEDTLS_ERR_CIPHER_INVALID_PADDING) )
00181             mbedtls_snprintf( buf, buflen, "CIPHER - Input data contains invalid padding and is rejected" );
00182         if( use_ret == -(MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED) )
00183             mbedtls_snprintf( buf, buflen, "CIPHER - Decryption of block requires a full block" );
00184         if( use_ret == -(MBEDTLS_ERR_CIPHER_AUTH_FAILED) )
00185             mbedtls_snprintf( buf, buflen, "CIPHER - Authentication failed (for AEAD modes)" );
00186         if( use_ret == -(MBEDTLS_ERR_CIPHER_INVALID_CONTEXT) )
00187             mbedtls_snprintf( buf, buflen, "CIPHER - The context is invalid, eg because it was free()ed" );
00188 #endif /* MBEDTLS_CIPHER_C */
00189 
00190 #if defined(MBEDTLS_DHM_C)
00191         if( use_ret == -(MBEDTLS_ERR_DHM_BAD_INPUT_DATA) )
00192             mbedtls_snprintf( buf, buflen, "DHM - Bad input parameters to function" );
00193         if( use_ret == -(MBEDTLS_ERR_DHM_READ_PARAMS_FAILED) )
00194             mbedtls_snprintf( buf, buflen, "DHM - Reading of the DHM parameters failed" );
00195         if( use_ret == -(MBEDTLS_ERR_DHM_MAKE_PARAMS_FAILED) )
00196             mbedtls_snprintf( buf, buflen, "DHM - Making of the DHM parameters failed" );
00197         if( use_ret == -(MBEDTLS_ERR_DHM_READ_PUBLIC_FAILED) )
00198             mbedtls_snprintf( buf, buflen, "DHM - Reading of the public values failed" );
00199         if( use_ret == -(MBEDTLS_ERR_DHM_MAKE_PUBLIC_FAILED) )
00200             mbedtls_snprintf( buf, buflen, "DHM - Making of the public value failed" );
00201         if( use_ret == -(MBEDTLS_ERR_DHM_CALC_SECRET_FAILED) )
00202             mbedtls_snprintf( buf, buflen, "DHM - Calculation of the DHM secret failed" );
00203         if( use_ret == -(MBEDTLS_ERR_DHM_INVALID_FORMAT) )
00204             mbedtls_snprintf( buf, buflen, "DHM - The ASN.1 data is not formatted correctly" );
00205         if( use_ret == -(MBEDTLS_ERR_DHM_ALLOC_FAILED) )
00206             mbedtls_snprintf( buf, buflen, "DHM - Allocation of memory failed" );
00207         if( use_ret == -(MBEDTLS_ERR_DHM_FILE_IO_ERROR) )
00208             mbedtls_snprintf( buf, buflen, "DHM - Read/write of file failed" );
00209 #endif /* MBEDTLS_DHM_C */
00210 
00211 #if defined(MBEDTLS_ECP_C)
00212         if( use_ret == -(MBEDTLS_ERR_ECP_BAD_INPUT_DATA) )
00213             mbedtls_snprintf( buf, buflen, "ECP - Bad input parameters to function" );
00214         if( use_ret == -(MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL) )
00215             mbedtls_snprintf( buf, buflen, "ECP - The buffer is too small to write to" );
00216         if( use_ret == -(MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE) )
00217             mbedtls_snprintf( buf, buflen, "ECP - Requested curve not available" );
00218         if( use_ret == -(MBEDTLS_ERR_ECP_VERIFY_FAILED) )
00219             mbedtls_snprintf( buf, buflen, "ECP - The signature is not valid" );
00220         if( use_ret == -(MBEDTLS_ERR_ECP_ALLOC_FAILED) )
00221             mbedtls_snprintf( buf, buflen, "ECP - Memory allocation failed" );
00222         if( use_ret == -(MBEDTLS_ERR_ECP_RANDOM_FAILED) )
00223             mbedtls_snprintf( buf, buflen, "ECP - Generation of random value, such as (ephemeral) key, failed" );
00224         if( use_ret == -(MBEDTLS_ERR_ECP_INVALID_KEY) )
00225             mbedtls_snprintf( buf, buflen, "ECP - Invalid private or public key" );
00226         if( use_ret == -(MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) )
00227             mbedtls_snprintf( buf, buflen, "ECP - Signature is valid but shorter than the user-supplied length" );
00228 #endif /* MBEDTLS_ECP_C */
00229 
00230 #if defined(MBEDTLS_MD_C)
00231         if( use_ret == -(MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE) )
00232             mbedtls_snprintf( buf, buflen, "MD - The selected feature is not available" );
00233         if( use_ret == -(MBEDTLS_ERR_MD_BAD_INPUT_DATA) )
00234             mbedtls_snprintf( buf, buflen, "MD - Bad input parameters to function" );
00235         if( use_ret == -(MBEDTLS_ERR_MD_ALLOC_FAILED) )
00236             mbedtls_snprintf( buf, buflen, "MD - Failed to allocate memory" );
00237         if( use_ret == -(MBEDTLS_ERR_MD_FILE_IO_ERROR) )
00238             mbedtls_snprintf( buf, buflen, "MD - Opening or reading of file failed" );
00239 #endif /* MBEDTLS_MD_C */
00240 
00241 #if defined(MBEDTLS_PEM_PARSE_C) || defined(MBEDTLS_PEM_WRITE_C)
00242         if( use_ret == -(MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) )
00243             mbedtls_snprintf( buf, buflen, "PEM - No PEM header or footer found" );
00244         if( use_ret == -(MBEDTLS_ERR_PEM_INVALID_DATA) )
00245             mbedtls_snprintf( buf, buflen, "PEM - PEM string is not as expected" );
00246         if( use_ret == -(MBEDTLS_ERR_PEM_ALLOC_FAILED) )
00247             mbedtls_snprintf( buf, buflen, "PEM - Failed to allocate memory" );
00248         if( use_ret == -(MBEDTLS_ERR_PEM_INVALID_ENC_IV) )
00249             mbedtls_snprintf( buf, buflen, "PEM - RSA IV is not in hex-format" );
00250         if( use_ret == -(MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG) )
00251             mbedtls_snprintf( buf, buflen, "PEM - Unsupported key encryption algorithm" );
00252         if( use_ret == -(MBEDTLS_ERR_PEM_PASSWORD_REQUIRED) )
00253             mbedtls_snprintf( buf, buflen, "PEM - Private key password can't be empty" );
00254         if( use_ret == -(MBEDTLS_ERR_PEM_PASSWORD_MISMATCH) )
00255             mbedtls_snprintf( buf, buflen, "PEM - Given private key password does not allow for correct decryption" );
00256         if( use_ret == -(MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE) )
00257             mbedtls_snprintf( buf, buflen, "PEM - Unavailable feature, e.g. hashing/encryption combination" );
00258         if( use_ret == -(MBEDTLS_ERR_PEM_BAD_INPUT_DATA) )
00259             mbedtls_snprintf( buf, buflen, "PEM - Bad input parameters to function" );
00260 #endif /* MBEDTLS_PEM_PARSE_C || MBEDTLS_PEM_WRITE_C */
00261 
00262 #if defined(MBEDTLS_PK_C)
00263         if( use_ret == -(MBEDTLS_ERR_PK_ALLOC_FAILED) )
00264             mbedtls_snprintf( buf, buflen, "PK - Memory allocation failed" );
00265         if( use_ret == -(MBEDTLS_ERR_PK_TYPE_MISMATCH) )
00266             mbedtls_snprintf( buf, buflen, "PK - Type mismatch, eg attempt to encrypt with an ECDSA key" );
00267         if( use_ret == -(MBEDTLS_ERR_PK_BAD_INPUT_DATA) )
00268             mbedtls_snprintf( buf, buflen, "PK - Bad input parameters to function" );
00269         if( use_ret == -(MBEDTLS_ERR_PK_FILE_IO_ERROR) )
00270             mbedtls_snprintf( buf, buflen, "PK - Read/write of file failed" );
00271         if( use_ret == -(MBEDTLS_ERR_PK_KEY_INVALID_VERSION) )
00272             mbedtls_snprintf( buf, buflen, "PK - Unsupported key version" );
00273         if( use_ret == -(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT) )
00274             mbedtls_snprintf( buf, buflen, "PK - Invalid key tag or value" );
00275         if( use_ret == -(MBEDTLS_ERR_PK_UNKNOWN_PK_ALG) )
00276             mbedtls_snprintf( buf, buflen, "PK - Key algorithm is unsupported (only RSA and EC are supported)" );
00277         if( use_ret == -(MBEDTLS_ERR_PK_PASSWORD_REQUIRED) )
00278             mbedtls_snprintf( buf, buflen, "PK - Private key password can't be empty" );
00279         if( use_ret == -(MBEDTLS_ERR_PK_PASSWORD_MISMATCH) )
00280             mbedtls_snprintf( buf, buflen, "PK - Given private key password does not allow for correct decryption" );
00281         if( use_ret == -(MBEDTLS_ERR_PK_INVALID_PUBKEY) )
00282             mbedtls_snprintf( buf, buflen, "PK - The pubkey tag or value is invalid (only RSA and EC are supported)" );
00283         if( use_ret == -(MBEDTLS_ERR_PK_INVALID_ALG) )
00284             mbedtls_snprintf( buf, buflen, "PK - The algorithm tag or value is invalid" );
00285         if( use_ret == -(MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE) )
00286             mbedtls_snprintf( buf, buflen, "PK - Elliptic curve is unsupported (only NIST curves are supported)" );
00287         if( use_ret == -(MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE) )
00288             mbedtls_snprintf( buf, buflen, "PK - Unavailable feature, e.g. RSA disabled for RSA key" );
00289         if( use_ret == -(MBEDTLS_ERR_PK_SIG_LEN_MISMATCH) )
00290             mbedtls_snprintf( buf, buflen, "PK - The signature is valid but its length is less than expected" );
00291 #endif /* MBEDTLS_PK_C */
00292 
00293 #if defined(MBEDTLS_PKCS12_C)
00294         if( use_ret == -(MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA) )
00295             mbedtls_snprintf( buf, buflen, "PKCS12 - Bad input parameters to function" );
00296         if( use_ret == -(MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE) )
00297             mbedtls_snprintf( buf, buflen, "PKCS12 - Feature not available, e.g. unsupported encryption scheme" );
00298         if( use_ret == -(MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT) )
00299             mbedtls_snprintf( buf, buflen, "PKCS12 - PBE ASN.1 data not as expected" );
00300         if( use_ret == -(MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH) )
00301             mbedtls_snprintf( buf, buflen, "PKCS12 - Given private key password does not allow for correct decryption" );
00302 #endif /* MBEDTLS_PKCS12_C */
00303 
00304 #if defined(MBEDTLS_PKCS5_C)
00305         if( use_ret == -(MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA) )
00306             mbedtls_snprintf( buf, buflen, "PKCS5 - Bad input parameters to function" );
00307         if( use_ret == -(MBEDTLS_ERR_PKCS5_INVALID_FORMAT) )
00308             mbedtls_snprintf( buf, buflen, "PKCS5 - Unexpected ASN.1 data" );
00309         if( use_ret == -(MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE) )
00310             mbedtls_snprintf( buf, buflen, "PKCS5 - Requested encryption or digest alg not available" );
00311         if( use_ret == -(MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH) )
00312             mbedtls_snprintf( buf, buflen, "PKCS5 - Given private key password does not allow for correct decryption" );
00313 #endif /* MBEDTLS_PKCS5_C */
00314 
00315 #if defined(MBEDTLS_RSA_C)
00316         if( use_ret == -(MBEDTLS_ERR_RSA_BAD_INPUT_DATA) )
00317             mbedtls_snprintf( buf, buflen, "RSA - Bad input parameters to function" );
00318         if( use_ret == -(MBEDTLS_ERR_RSA_INVALID_PADDING) )
00319             mbedtls_snprintf( buf, buflen, "RSA - Input data contains invalid padding and is rejected" );
00320         if( use_ret == -(MBEDTLS_ERR_RSA_KEY_GEN_FAILED) )
00321             mbedtls_snprintf( buf, buflen, "RSA - Something failed during generation of a key" );
00322         if( use_ret == -(MBEDTLS_ERR_RSA_KEY_CHECK_FAILED) )
00323             mbedtls_snprintf( buf, buflen, "RSA - Key failed to pass the library's validity check" );
00324         if( use_ret == -(MBEDTLS_ERR_RSA_PUBLIC_FAILED) )
00325             mbedtls_snprintf( buf, buflen, "RSA - The public key operation failed" );
00326         if( use_ret == -(MBEDTLS_ERR_RSA_PRIVATE_FAILED) )
00327             mbedtls_snprintf( buf, buflen, "RSA - The private key operation failed" );
00328         if( use_ret == -(MBEDTLS_ERR_RSA_VERIFY_FAILED) )
00329             mbedtls_snprintf( buf, buflen, "RSA - The PKCS#1 verification failed" );
00330         if( use_ret == -(MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE) )
00331             mbedtls_snprintf( buf, buflen, "RSA - The output buffer for decryption is not large enough" );
00332         if( use_ret == -(MBEDTLS_ERR_RSA_RNG_FAILED) )
00333             mbedtls_snprintf( buf, buflen, "RSA - The random generator failed to generate non-zeros" );
00334 #endif /* MBEDTLS_RSA_C */
00335 
00336 #if defined(MBEDTLS_SSL_TLS_C)
00337         if( use_ret == -(MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE) )
00338             mbedtls_snprintf( buf, buflen, "SSL - The requested feature is not available" );
00339         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_INPUT_DATA) )
00340             mbedtls_snprintf( buf, buflen, "SSL - Bad input parameters to function" );
00341         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_MAC) )
00342             mbedtls_snprintf( buf, buflen, "SSL - Verification of the message MAC failed" );
00343         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_RECORD) )
00344             mbedtls_snprintf( buf, buflen, "SSL - An invalid SSL record was received" );
00345         if( use_ret == -(MBEDTLS_ERR_SSL_CONN_EOF) )
00346             mbedtls_snprintf( buf, buflen, "SSL - The connection indicated an EOF" );
00347         if( use_ret == -(MBEDTLS_ERR_SSL_UNKNOWN_CIPHER) )
00348             mbedtls_snprintf( buf, buflen, "SSL - An unknown cipher was received" );
00349         if( use_ret == -(MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN) )
00350             mbedtls_snprintf( buf, buflen, "SSL - The server has no ciphersuites in common with the client" );
00351         if( use_ret == -(MBEDTLS_ERR_SSL_NO_RNG) )
00352             mbedtls_snprintf( buf, buflen, "SSL - No RNG was provided to the SSL module" );
00353         if( use_ret == -(MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE) )
00354             mbedtls_snprintf( buf, buflen, "SSL - No client certification received from the client, but required by the authentication mode" );
00355         if( use_ret == -(MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE) )
00356             mbedtls_snprintf( buf, buflen, "SSL - Our own certificate(s) is/are too large to send in an SSL message" );
00357         if( use_ret == -(MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED) )
00358             mbedtls_snprintf( buf, buflen, "SSL - The own certificate is not set, but needed by the server" );
00359         if( use_ret == -(MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED) )
00360             mbedtls_snprintf( buf, buflen, "SSL - The own private key or pre-shared key is not set, but needed" );
00361         if( use_ret == -(MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED) )
00362             mbedtls_snprintf( buf, buflen, "SSL - No CA Chain is set, but required to operate" );
00363         if( use_ret == -(MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE) )
00364             mbedtls_snprintf( buf, buflen, "SSL - An unexpected message was received from our peer" );
00365         if( use_ret == -(MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE) )
00366         {
00367             mbedtls_snprintf( buf, buflen, "SSL - A fatal alert message was received from our peer" );
00368             return;
00369         }
00370         if( use_ret == -(MBEDTLS_ERR_SSL_PEER_VERIFY_FAILED) )
00371             mbedtls_snprintf( buf, buflen, "SSL - Verification of our peer failed" );
00372         if( use_ret == -(MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) )
00373             mbedtls_snprintf( buf, buflen, "SSL - The peer notified us that the connection is going to be closed" );
00374         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO) )
00375             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientHello handshake message failed" );
00376         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO) )
00377             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerHello handshake message failed" );
00378         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE) )
00379             mbedtls_snprintf( buf, buflen, "SSL - Processing of the Certificate handshake message failed" );
00380         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST) )
00381             mbedtls_snprintf( buf, buflen, "SSL - Processing of the CertificateRequest handshake message failed" );
00382         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE) )
00383             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerKeyExchange handshake message failed" );
00384         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE) )
00385             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ServerHelloDone handshake message failed" );
00386         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE) )
00387             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed" );
00388         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP) )
00389             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Read Public" );
00390         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS) )
00391             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Calculate Secret" );
00392         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY) )
00393             mbedtls_snprintf( buf, buflen, "SSL - Processing of the CertificateVerify handshake message failed" );
00394         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC) )
00395             mbedtls_snprintf( buf, buflen, "SSL - Processing of the ChangeCipherSpec handshake message failed" );
00396         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_FINISHED) )
00397             mbedtls_snprintf( buf, buflen, "SSL - Processing of the Finished handshake message failed" );
00398         if( use_ret == -(MBEDTLS_ERR_SSL_ALLOC_FAILED) )
00399             mbedtls_snprintf( buf, buflen, "SSL - Memory allocation failed" );
00400         if( use_ret == -(MBEDTLS_ERR_SSL_HW_ACCEL_FAILED) )
00401             mbedtls_snprintf( buf, buflen, "SSL - Hardware acceleration function returned with error" );
00402         if( use_ret == -(MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH) )
00403             mbedtls_snprintf( buf, buflen, "SSL - Hardware acceleration function skipped / left alone data" );
00404         if( use_ret == -(MBEDTLS_ERR_SSL_COMPRESSION_FAILED) )
00405             mbedtls_snprintf( buf, buflen, "SSL - Processing of the compression / decompression failed" );
00406         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION) )
00407             mbedtls_snprintf( buf, buflen, "SSL - Handshake protocol not within min/max boundaries" );
00408         if( use_ret == -(MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET) )
00409             mbedtls_snprintf( buf, buflen, "SSL - Processing of the NewSessionTicket handshake message failed" );
00410         if( use_ret == -(MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED) )
00411             mbedtls_snprintf( buf, buflen, "SSL - Session ticket has expired" );
00412         if( use_ret == -(MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH) )
00413             mbedtls_snprintf( buf, buflen, "SSL - Public key type mismatch (eg, asked for RSA key exchange and presented EC key)" );
00414         if( use_ret == -(MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY) )
00415             mbedtls_snprintf( buf, buflen, "SSL - Unknown identity received (eg, PSK identity)" );
00416         if( use_ret == -(MBEDTLS_ERR_SSL_INTERNAL_ERROR) )
00417             mbedtls_snprintf( buf, buflen, "SSL - Internal error (eg, unexpected failure in lower-level module)" );
00418         if( use_ret == -(MBEDTLS_ERR_SSL_COUNTER_WRAPPING) )
00419             mbedtls_snprintf( buf, buflen, "SSL - A counter would wrap (eg, too many messages exchanged)" );
00420         if( use_ret == -(MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO) )
00421             mbedtls_snprintf( buf, buflen, "SSL - Unexpected message at ServerHello in renegotiation" );
00422         if( use_ret == -(MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED) )
00423             mbedtls_snprintf( buf, buflen, "SSL - DTLS client must retry for hello verification" );
00424         if( use_ret == -(MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL) )
00425             mbedtls_snprintf( buf, buflen, "SSL - A buffer is too small to receive or write a message" );
00426         if( use_ret == -(MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE) )
00427             mbedtls_snprintf( buf, buflen, "SSL - None of the common ciphersuites is usable (eg, no suitable certificate, see debug messages)" );
00428         if( use_ret == -(MBEDTLS_ERR_SSL_WANT_READ) )
00429             mbedtls_snprintf( buf, buflen, "SSL - Connection requires a read call" );
00430         if( use_ret == -(MBEDTLS_ERR_SSL_WANT_WRITE) )
00431             mbedtls_snprintf( buf, buflen, "SSL - Connection requires a write call" );
00432         if( use_ret == -(MBEDTLS_ERR_SSL_TIMEOUT) )
00433             mbedtls_snprintf( buf, buflen, "SSL - The operation timed out" );
00434         if( use_ret == -(MBEDTLS_ERR_SSL_CLIENT_RECONNECT) )
00435             mbedtls_snprintf( buf, buflen, "SSL - The client initiated a reconnect from the same port" );
00436         if( use_ret == -(MBEDTLS_ERR_SSL_UNEXPECTED_RECORD) )
00437             mbedtls_snprintf( buf, buflen, "SSL - Record header looks valid but is not expected" );
00438         if( use_ret == -(MBEDTLS_ERR_SSL_NON_FATAL) )
00439             mbedtls_snprintf( buf, buflen, "SSL - The alert message received indicates a non-fatal error" );
00440         if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH) )
00441             mbedtls_snprintf( buf, buflen, "SSL - Couldn't set the hash for verifying CertificateVerify" );
00442 #endif /* MBEDTLS_SSL_TLS_C */
00443 
00444 #if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)
00445         if( use_ret == -(MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE) )
00446             mbedtls_snprintf( buf, buflen, "X509 - Unavailable feature, e.g. RSA hashing/encryption combination" );
00447         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_OID) )
00448             mbedtls_snprintf( buf, buflen, "X509 - Requested OID is unknown" );
00449         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_FORMAT) )
00450             mbedtls_snprintf( buf, buflen, "X509 - The CRT/CRL/CSR format is invalid, e.g. different type expected" );
00451         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_VERSION) )
00452             mbedtls_snprintf( buf, buflen, "X509 - The CRT/CRL/CSR version element is invalid" );
00453         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_SERIAL) )
00454             mbedtls_snprintf( buf, buflen, "X509 - The serial tag or value is invalid" );
00455         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_ALG) )
00456             mbedtls_snprintf( buf, buflen, "X509 - The algorithm tag or value is invalid" );
00457         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_NAME) )
00458             mbedtls_snprintf( buf, buflen, "X509 - The name tag or value is invalid" );
00459         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_DATE) )
00460             mbedtls_snprintf( buf, buflen, "X509 - The date tag or value is invalid" );
00461         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_SIGNATURE) )
00462             mbedtls_snprintf( buf, buflen, "X509 - The signature tag or value invalid" );
00463         if( use_ret == -(MBEDTLS_ERR_X509_INVALID_EXTENSIONS) )
00464             mbedtls_snprintf( buf, buflen, "X509 - The extension tag or value is invalid" );
00465         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_VERSION) )
00466             mbedtls_snprintf( buf, buflen, "X509 - CRT/CRL/CSR has an unsupported version number" );
00467         if( use_ret == -(MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG) )
00468             mbedtls_snprintf( buf, buflen, "X509 - Signature algorithm (oid) is unsupported" );
00469         if( use_ret == -(MBEDTLS_ERR_X509_SIG_MISMATCH) )
00470             mbedtls_snprintf( buf, buflen, "X509 - Signature algorithms do not match. (see \\c ::mbedtls_x509_crt sig_oid)" );
00471         if( use_ret == -(MBEDTLS_ERR_X509_CERT_VERIFY_FAILED) )
00472             mbedtls_snprintf( buf, buflen, "X509 - Certificate verification failed, e.g. CRL, CA or signature check failed" );
00473         if( use_ret == -(MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT) )
00474             mbedtls_snprintf( buf, buflen, "X509 - Format not recognized as DER or PEM" );
00475         if( use_ret == -(MBEDTLS_ERR_X509_BAD_INPUT_DATA) )
00476             mbedtls_snprintf( buf, buflen, "X509 - Input invalid" );
00477         if( use_ret == -(MBEDTLS_ERR_X509_ALLOC_FAILED) )
00478             mbedtls_snprintf( buf, buflen, "X509 - Allocation of memory failed" );
00479         if( use_ret == -(MBEDTLS_ERR_X509_FILE_IO_ERROR) )
00480             mbedtls_snprintf( buf, buflen, "X509 - Read/write of file failed" );
00481         if( use_ret == -(MBEDTLS_ERR_X509_BUFFER_TOO_SMALL) )
00482             mbedtls_snprintf( buf, buflen, "X509 - Destination buffer is too small" );
00483 #endif /* MBEDTLS_X509_USE_C || MBEDTLS_X509_CREATE_C */
00484         // END generated code
00485 
00486         if( strlen( buf ) == 0 )
00487             mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
00488     }
00489 
00490     use_ret = ret & ~0xFF80;
00491 
00492     if( use_ret == 0 )
00493         return;
00494 
00495     // If high level code is present, make a concatenation between both
00496     // error strings.
00497     //
00498     len = strlen( buf );
00499 
00500     if( len > 0 )
00501     {
00502         if( buflen - len < 5 )
00503             return;
00504 
00505         mbedtls_snprintf( buf + len, buflen - len, " : " );
00506 
00507         buf += len + 3;
00508         buflen -= len + 3;
00509     }
00510 
00511     // Low level error codes
00512     //
00513     // BEGIN generated code
00514 #if defined(MBEDTLS_AES_C)
00515     if( use_ret == -(MBEDTLS_ERR_AES_INVALID_KEY_LENGTH) )
00516         mbedtls_snprintf( buf, buflen, "AES - Invalid key length" );
00517     if( use_ret == -(MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH) )
00518         mbedtls_snprintf( buf, buflen, "AES - Invalid data input length" );
00519 #endif /* MBEDTLS_AES_C */
00520 
00521 #if defined(MBEDTLS_ASN1_PARSE_C)
00522     if( use_ret == -(MBEDTLS_ERR_ASN1_OUT_OF_DATA) )
00523         mbedtls_snprintf( buf, buflen, "ASN1 - Out of data when parsing an ASN1 data structure" );
00524     if( use_ret == -(MBEDTLS_ERR_ASN1_UNEXPECTED_TAG) )
00525         mbedtls_snprintf( buf, buflen, "ASN1 - ASN1 tag was of an unexpected value" );
00526     if( use_ret == -(MBEDTLS_ERR_ASN1_INVALID_LENGTH) )
00527         mbedtls_snprintf( buf, buflen, "ASN1 - Error when trying to determine the length or invalid length" );
00528     if( use_ret == -(MBEDTLS_ERR_ASN1_LENGTH_MISMATCH) )
00529         mbedtls_snprintf( buf, buflen, "ASN1 - Actual length differs from expected length" );
00530     if( use_ret == -(MBEDTLS_ERR_ASN1_INVALID_DATA) )
00531         mbedtls_snprintf( buf, buflen, "ASN1 - Data is invalid. (not used)" );
00532     if( use_ret == -(MBEDTLS_ERR_ASN1_ALLOC_FAILED) )
00533         mbedtls_snprintf( buf, buflen, "ASN1 - Memory allocation failed" );
00534     if( use_ret == -(MBEDTLS_ERR_ASN1_BUF_TOO_SMALL) )
00535         mbedtls_snprintf( buf, buflen, "ASN1 - Buffer too small when writing ASN.1 data structure" );
00536 #endif /* MBEDTLS_ASN1_PARSE_C */
00537 
00538 #if defined(MBEDTLS_BASE64_C)
00539     if( use_ret == -(MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL) )
00540         mbedtls_snprintf( buf, buflen, "BASE64 - Output buffer too small" );
00541     if( use_ret == -(MBEDTLS_ERR_BASE64_INVALID_CHARACTER) )
00542         mbedtls_snprintf( buf, buflen, "BASE64 - Invalid character in input" );
00543 #endif /* MBEDTLS_BASE64_C */
00544 
00545 #if defined(MBEDTLS_BIGNUM_C)
00546     if( use_ret == -(MBEDTLS_ERR_MPI_FILE_IO_ERROR) )
00547         mbedtls_snprintf( buf, buflen, "BIGNUM - An error occurred while reading from or writing to a file" );
00548     if( use_ret == -(MBEDTLS_ERR_MPI_BAD_INPUT_DATA) )
00549         mbedtls_snprintf( buf, buflen, "BIGNUM - Bad input parameters to function" );
00550     if( use_ret == -(MBEDTLS_ERR_MPI_INVALID_CHARACTER) )
00551         mbedtls_snprintf( buf, buflen, "BIGNUM - There is an invalid character in the digit string" );
00552     if( use_ret == -(MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL) )
00553         mbedtls_snprintf( buf, buflen, "BIGNUM - The buffer is too small to write to" );
00554     if( use_ret == -(MBEDTLS_ERR_MPI_NEGATIVE_VALUE) )
00555         mbedtls_snprintf( buf, buflen, "BIGNUM - The input arguments are negative or result in illegal output" );
00556     if( use_ret == -(MBEDTLS_ERR_MPI_DIVISION_BY_ZERO) )
00557         mbedtls_snprintf( buf, buflen, "BIGNUM - The input argument for division is zero, which is not allowed" );
00558     if( use_ret == -(MBEDTLS_ERR_MPI_NOT_ACCEPTABLE) )
00559         mbedtls_snprintf( buf, buflen, "BIGNUM - The input arguments are not acceptable" );
00560     if( use_ret == -(MBEDTLS_ERR_MPI_ALLOC_FAILED) )
00561         mbedtls_snprintf( buf, buflen, "BIGNUM - Memory allocation failed" );
00562 #endif /* MBEDTLS_BIGNUM_C */
00563 
00564 #if defined(MBEDTLS_BLOWFISH_C)
00565     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH) )
00566         mbedtls_snprintf( buf, buflen, "BLOWFISH - Invalid key length" );
00567     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH) )
00568         mbedtls_snprintf( buf, buflen, "BLOWFISH - Invalid data input length" );
00569 #endif /* MBEDTLS_BLOWFISH_C */
00570 
00571 #if defined(MBEDTLS_CAMELLIA_C)
00572     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH) )
00573         mbedtls_snprintf( buf, buflen, "CAMELLIA - Invalid key length" );
00574     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH) )
00575         mbedtls_snprintf( buf, buflen, "CAMELLIA - Invalid data input length" );
00576 #endif /* MBEDTLS_CAMELLIA_C */
00577 
00578 #if defined(MBEDTLS_CCM_C)
00579     if( use_ret == -(MBEDTLS_ERR_CCM_BAD_INPUT) )
00580         mbedtls_snprintf( buf, buflen, "CCM - Bad input parameters to function" );
00581     if( use_ret == -(MBEDTLS_ERR_CCM_AUTH_FAILED) )
00582         mbedtls_snprintf( buf, buflen, "CCM - Authenticated decryption failed" );
00583 #endif /* MBEDTLS_CCM_C */
00584 
00585 #if defined(MBEDTLS_CTR_DRBG_C)
00586     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED) )
00587         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The entropy source failed" );
00588     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG) )
00589         mbedtls_snprintf( buf, buflen, "CTR_DRBG - Too many random requested in single call" );
00590     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG) )
00591         mbedtls_snprintf( buf, buflen, "CTR_DRBG - Input too large (Entropy + additional)" );
00592     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR) )
00593         mbedtls_snprintf( buf, buflen, "CTR_DRBG - Read/write error in file" );
00594 #endif /* MBEDTLS_CTR_DRBG_C */
00595 
00596 #if defined(MBEDTLS_DES_C)
00597     if( use_ret == -(MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH) )
00598         mbedtls_snprintf( buf, buflen, "DES - The data input has an invalid length" );
00599 #endif /* MBEDTLS_DES_C */
00600 
00601 #if defined(MBEDTLS_ENTROPY_C)
00602     if( use_ret == -(MBEDTLS_ERR_ENTROPY_SOURCE_FAILED) )
00603         mbedtls_snprintf( buf, buflen, "ENTROPY - Critical entropy source failure" );
00604     if( use_ret == -(MBEDTLS_ERR_ENTROPY_MAX_SOURCES) )
00605         mbedtls_snprintf( buf, buflen, "ENTROPY - No more sources can be added" );
00606     if( use_ret == -(MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED) )
00607         mbedtls_snprintf( buf, buflen, "ENTROPY - No sources have been added to poll" );
00608     if( use_ret == -(MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE) )
00609         mbedtls_snprintf( buf, buflen, "ENTROPY - No strong sources have been added to poll" );
00610     if( use_ret == -(MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR) )
00611         mbedtls_snprintf( buf, buflen, "ENTROPY - Read/write error in file" );
00612 #endif /* MBEDTLS_ENTROPY_C */
00613 
00614 #if defined(MBEDTLS_GCM_C)
00615     if( use_ret == -(MBEDTLS_ERR_GCM_AUTH_FAILED) )
00616         mbedtls_snprintf( buf, buflen, "GCM - Authenticated decryption failed" );
00617     if( use_ret == -(MBEDTLS_ERR_GCM_BAD_INPUT) )
00618         mbedtls_snprintf( buf, buflen, "GCM - Bad input parameters to function" );
00619 #endif /* MBEDTLS_GCM_C */
00620 
00621 #if defined(MBEDTLS_HMAC_DRBG_C)
00622     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG) )
00623         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Too many random requested in single call" );
00624     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG) )
00625         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Input too large (Entropy + additional)" );
00626     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR) )
00627         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - Read/write error in file" );
00628     if( use_ret == -(MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED) )
00629         mbedtls_snprintf( buf, buflen, "HMAC_DRBG - The entropy source failed" );
00630 #endif /* MBEDTLS_HMAC_DRBG_C */
00631 
00632 #if defined(MBEDTLS_NET_C)
00633     if( use_ret == -(MBEDTLS_ERR_NET_SOCKET_FAILED) )
00634         mbedtls_snprintf( buf, buflen, "NET - Failed to open a socket" );
00635     if( use_ret == -(MBEDTLS_ERR_NET_CONNECT_FAILED) )
00636         mbedtls_snprintf( buf, buflen, "NET - The connection to the given server / port failed" );
00637     if( use_ret == -(MBEDTLS_ERR_NET_BIND_FAILED) )
00638         mbedtls_snprintf( buf, buflen, "NET - Binding of the socket failed" );
00639     if( use_ret == -(MBEDTLS_ERR_NET_LISTEN_FAILED) )
00640         mbedtls_snprintf( buf, buflen, "NET - Could not listen on the socket" );
00641     if( use_ret == -(MBEDTLS_ERR_NET_ACCEPT_FAILED) )
00642         mbedtls_snprintf( buf, buflen, "NET - Could not accept the incoming connection" );
00643     if( use_ret == -(MBEDTLS_ERR_NET_RECV_FAILED) )
00644         mbedtls_snprintf( buf, buflen, "NET - Reading information from the socket failed" );
00645     if( use_ret == -(MBEDTLS_ERR_NET_SEND_FAILED) )
00646         mbedtls_snprintf( buf, buflen, "NET - Sending information through the socket failed" );
00647     if( use_ret == -(MBEDTLS_ERR_NET_CONN_RESET) )
00648         mbedtls_snprintf( buf, buflen, "NET - Connection was reset by peer" );
00649     if( use_ret == -(MBEDTLS_ERR_NET_UNKNOWN_HOST) )
00650         mbedtls_snprintf( buf, buflen, "NET - Failed to get an IP address for the given hostname" );
00651     if( use_ret == -(MBEDTLS_ERR_NET_BUFFER_TOO_SMALL) )
00652         mbedtls_snprintf( buf, buflen, "NET - Buffer is too small to hold the data" );
00653     if( use_ret == -(MBEDTLS_ERR_NET_INVALID_CONTEXT) )
00654         mbedtls_snprintf( buf, buflen, "NET - The context is invalid, eg because it was free()ed" );
00655 #endif /* MBEDTLS_NET_C */
00656 
00657 #if defined(MBEDTLS_OID_C)
00658     if( use_ret == -(MBEDTLS_ERR_OID_NOT_FOUND) )
00659         mbedtls_snprintf( buf, buflen, "OID - OID is not found" );
00660     if( use_ret == -(MBEDTLS_ERR_OID_BUF_TOO_SMALL) )
00661         mbedtls_snprintf( buf, buflen, "OID - output buffer is too small" );
00662 #endif /* MBEDTLS_OID_C */
00663 
00664 #if defined(MBEDTLS_PADLOCK_C)
00665     if( use_ret == -(MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED) )
00666         mbedtls_snprintf( buf, buflen, "PADLOCK - Input data should be aligned" );
00667 #endif /* MBEDTLS_PADLOCK_C */
00668 
00669 #if defined(MBEDTLS_THREADING_C)
00670     if( use_ret == -(MBEDTLS_ERR_THREADING_FEATURE_UNAVAILABLE) )
00671         mbedtls_snprintf( buf, buflen, "THREADING - The selected feature is not available" );
00672     if( use_ret == -(MBEDTLS_ERR_THREADING_BAD_INPUT_DATA) )
00673         mbedtls_snprintf( buf, buflen, "THREADING - Bad input parameters to function" );
00674     if( use_ret == -(MBEDTLS_ERR_THREADING_MUTEX_ERROR) )
00675         mbedtls_snprintf( buf, buflen, "THREADING - Locking / unlocking / free failed with error code" );
00676 #endif /* MBEDTLS_THREADING_C */
00677 
00678 #if defined(MBEDTLS_XTEA_C)
00679     if( use_ret == -(MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH) )
00680         mbedtls_snprintf( buf, buflen, "XTEA - The data input has an invalid length" );
00681 #endif /* MBEDTLS_XTEA_C */
00682     // END generated code
00683 
00684     if( strlen( buf ) != 0 )
00685         return;
00686 
00687     mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
00688 }
00689 
00690 #else /* MBEDTLS_ERROR_C */
00691 
00692 #if defined(MBEDTLS_ERROR_STRERROR_DUMMY)
00693 
00694 /*
00695  * Provide an non-function in case MBEDTLS_ERROR_C is not defined
00696  */
00697 void mbedtls_strerror( int ret, char *buf, size_t buflen )
00698 {
00699     ((void) ret);
00700 
00701     if( buflen > 0 )
00702         buf[0] = '\0';
00703 }
00704 
00705 #endif /* MBEDTLS_ERROR_STRERROR_DUMMY */
00706 
00707 #endif /* MBEDTLS_ERROR_C */