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/library/error.c

https://github.com/leg0/polarssl
C | 574 lines | 463 code | 77 blank | 34 comment | 294 complexity | 1d0aedf4503a9fac8a12818afe914ddb MD5 | raw file
  1/*
  2 *  Error message information
  3 *
  4 *  Copyright (C) 2006-2012, Brainspark B.V.
  5 *
  6 *  This file is part of PolarSSL (http://www.polarssl.org)
  7 *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
  8 *
  9 *  All rights reserved.
 10 *
 11 *  This program is free software; you can redistribute it and/or modify
 12 *  it under the terms of the GNU General Public License as published by
 13 *  the Free Software Foundation; either version 2 of the License, or
 14 *  (at your option) any later version.
 15 *
 16 *  This program is distributed in the hope that it will be useful,
 17 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 18 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 19 *  GNU General Public License for more details.
 20 *
 21 *  You should have received a copy of the GNU General Public License along
 22 *  with this program; if not, write to the Free Software Foundation, Inc.,
 23 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 24 */
 25
 26#include "polarssl/config.h"
 27
 28#if defined(POLARSSL_ERROR_C)
 29
 30#if defined(POLARSSL_AES_C)
 31#include "polarssl/aes.h"
 32#endif
 33
 34#if defined(POLARSSL_BASE64_C)
 35#include "polarssl/base64.h"
 36#endif
 37
 38#if defined(POLARSSL_BIGNUM_C)
 39#include "polarssl/bignum.h"
 40#endif
 41
 42#if defined(POLARSSL_BLOWFISH_C)
 43#include "polarssl/blowfish.h"
 44#endif
 45
 46#if defined(POLARSSL_CAMELLIA_C)
 47#include "polarssl/camellia.h"
 48#endif
 49
 50#if defined(POLARSSL_CIPHER_C)
 51#include "polarssl/cipher.h"
 52#endif
 53
 54#if defined(POLARSSL_CTR_DRBG_C)
 55#include "polarssl/ctr_drbg.h"
 56#endif
 57
 58#if defined(POLARSSL_DES_C)
 59#include "polarssl/des.h"
 60#endif
 61
 62#if defined(POLARSSL_DHM_C)
 63#include "polarssl/dhm.h"
 64#endif
 65
 66#if defined(POLARSSL_ENTROPY_C)
 67#include "polarssl/entropy.h"
 68#endif
 69
 70#if defined(POLARSSL_GCM_C)
 71#include "polarssl/gcm.h"
 72#endif
 73
 74#if defined(POLARSSL_MD_C)
 75#include "polarssl/md.h"
 76#endif
 77
 78#if defined(POLARSSL_MD2_C)
 79#include "polarssl/md2.h"
 80#endif
 81
 82#if defined(POLARSSL_MD4_C)
 83#include "polarssl/md4.h"
 84#endif
 85
 86#if defined(POLARSSL_MD5_C)
 87#include "polarssl/md5.h"
 88#endif
 89
 90#if defined(POLARSSL_NET_C)
 91#include "polarssl/net.h"
 92#endif
 93
 94#if defined(POLARSSL_PADLOCK_C)
 95#include "polarssl/padlock.h"
 96#endif
 97
 98#if defined(POLARSSL_PBKDF2_C)
 99#include "polarssl/pbkdf2.h"
100#endif
101
102#if defined(POLARSSL_PEM_C)
103#include "polarssl/pem.h"
104#endif
105
106#if defined(POLARSSL_RSA_C)
107#include "polarssl/rsa.h"
108#endif
109
110#if defined(POLARSSL_SHA1_C)
111#include "polarssl/sha1.h"
112#endif
113
114#if defined(POLARSSL_SHA2_C)
115#include "polarssl/sha2.h"
116#endif
117
118#if defined(POLARSSL_SHA4_C)
119#include "polarssl/sha4.h"
120#endif
121
122#if defined(POLARSSL_SSL_TLS_C)
123#include "polarssl/ssl.h"
124#endif
125
126#if defined(POLARSSL_X509_PARSE_C)
127#include "polarssl/x509.h"
128#endif
129
130#if defined(POLARSSL_XTEA_C)
131#include "polarssl/xtea.h"
132#endif
133
134
135#include <string.h>
136
137#if defined _MSC_VER && !defined  snprintf
138#define  snprintf  _snprintf
139#endif
140
141void error_strerror( int ret, char *buf, size_t buflen )
142{
143    size_t len;
144    int use_ret;
145
146    memset( buf, 0x00, buflen );
147     
148    if( ret < 0 )
149        ret = -ret;
150
151    if( ret & 0xFF80 )
152    {
153        use_ret = ret & 0xFF80;
154
155        // High level error codes
156        //
157#if defined(POLARSSL_CIPHER_C)
158        if( use_ret == -(POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE) )
159            snprintf( buf, buflen, "CIPHER - The selected feature is not available" );
160        if( use_ret == -(POLARSSL_ERR_CIPHER_BAD_INPUT_DATA) )
161            snprintf( buf, buflen, "CIPHER - Bad input parameters to function" );
162        if( use_ret == -(POLARSSL_ERR_CIPHER_ALLOC_FAILED) )
163            snprintf( buf, buflen, "CIPHER - Failed to allocate memory" );
164        if( use_ret == -(POLARSSL_ERR_CIPHER_INVALID_PADDING) )
165            snprintf( buf, buflen, "CIPHER - Input data contains invalid padding and is rejected" );
166        if( use_ret == -(POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED) )
167            snprintf( buf, buflen, "CIPHER - Decryption of block requires a full block" );
168#endif /* POLARSSL_CIPHER_C */
169
170#if defined(POLARSSL_DHM_C)
171        if( use_ret == -(POLARSSL_ERR_DHM_BAD_INPUT_DATA) )
172            snprintf( buf, buflen, "DHM - Bad input parameters to function" );
173        if( use_ret == -(POLARSSL_ERR_DHM_READ_PARAMS_FAILED) )
174            snprintf( buf, buflen, "DHM - Reading of the DHM parameters failed" );
175        if( use_ret == -(POLARSSL_ERR_DHM_MAKE_PARAMS_FAILED) )
176            snprintf( buf, buflen, "DHM - Making of the DHM parameters failed" );
177        if( use_ret == -(POLARSSL_ERR_DHM_READ_PUBLIC_FAILED) )
178            snprintf( buf, buflen, "DHM - Reading of the public values failed" );
179        if( use_ret == -(POLARSSL_ERR_DHM_MAKE_PUBLIC_FAILED) )
180            snprintf( buf, buflen, "DHM - Making of the public value failed" );
181        if( use_ret == -(POLARSSL_ERR_DHM_CALC_SECRET_FAILED) )
182            snprintf( buf, buflen, "DHM - Calculation of the DHM secret failed" );
183#endif /* POLARSSL_DHM_C */
184
185#if defined(POLARSSL_MD_C)
186        if( use_ret == -(POLARSSL_ERR_MD_FEATURE_UNAVAILABLE) )
187            snprintf( buf, buflen, "MD - The selected feature is not available" );
188        if( use_ret == -(POLARSSL_ERR_MD_BAD_INPUT_DATA) )
189            snprintf( buf, buflen, "MD - Bad input parameters to function" );
190        if( use_ret == -(POLARSSL_ERR_MD_ALLOC_FAILED) )
191            snprintf( buf, buflen, "MD - Failed to allocate memory" );
192        if( use_ret == -(POLARSSL_ERR_MD_FILE_IO_ERROR) )
193            snprintf( buf, buflen, "MD - Opening or reading of file failed" );
194#endif /* POLARSSL_MD_C */
195
196#if defined(POLARSSL_PEM_C)
197        if( use_ret == -(POLARSSL_ERR_PEM_NO_HEADER_PRESENT) )
198            snprintf( buf, buflen, "PEM - No PEM header found" );
199        if( use_ret == -(POLARSSL_ERR_PEM_INVALID_DATA) )
200            snprintf( buf, buflen, "PEM - PEM string is not as expected" );
201        if( use_ret == -(POLARSSL_ERR_PEM_MALLOC_FAILED) )
202            snprintf( buf, buflen, "PEM - Failed to allocate memory" );
203        if( use_ret == -(POLARSSL_ERR_PEM_INVALID_ENC_IV) )
204            snprintf( buf, buflen, "PEM - RSA IV is not in hex-format" );
205        if( use_ret == -(POLARSSL_ERR_PEM_UNKNOWN_ENC_ALG) )
206            snprintf( buf, buflen, "PEM - Unsupported key encryption algorithm" );
207        if( use_ret == -(POLARSSL_ERR_PEM_PASSWORD_REQUIRED) )
208            snprintf( buf, buflen, "PEM - Private key password can't be empty" );
209        if( use_ret == -(POLARSSL_ERR_PEM_PASSWORD_MISMATCH) )
210            snprintf( buf, buflen, "PEM - Given private key password does not allow for correct decryption" );
211        if( use_ret == -(POLARSSL_ERR_PEM_FEATURE_UNAVAILABLE) )
212            snprintf( buf, buflen, "PEM - Unavailable feature, e.g. hashing/encryption combination" );
213#endif /* POLARSSL_PEM_C */
214
215#if defined(POLARSSL_RSA_C)
216        if( use_ret == -(POLARSSL_ERR_RSA_BAD_INPUT_DATA) )
217            snprintf( buf, buflen, "RSA - Bad input parameters to function" );
218        if( use_ret == -(POLARSSL_ERR_RSA_INVALID_PADDING) )
219            snprintf( buf, buflen, "RSA - Input data contains invalid padding and is rejected" );
220        if( use_ret == -(POLARSSL_ERR_RSA_KEY_GEN_FAILED) )
221            snprintf( buf, buflen, "RSA - Something failed during generation of a key" );
222        if( use_ret == -(POLARSSL_ERR_RSA_KEY_CHECK_FAILED) )
223            snprintf( buf, buflen, "RSA - Key failed to pass the libraries validity check" );
224        if( use_ret == -(POLARSSL_ERR_RSA_PUBLIC_FAILED) )
225            snprintf( buf, buflen, "RSA - The public key operation failed" );
226        if( use_ret == -(POLARSSL_ERR_RSA_PRIVATE_FAILED) )
227            snprintf( buf, buflen, "RSA - The private key operation failed" );
228        if( use_ret == -(POLARSSL_ERR_RSA_VERIFY_FAILED) )
229            snprintf( buf, buflen, "RSA - The PKCS#1 verification failed" );
230        if( use_ret == -(POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE) )
231            snprintf( buf, buflen, "RSA - The output buffer for decryption is not large enough" );
232        if( use_ret == -(POLARSSL_ERR_RSA_RNG_FAILED) )
233            snprintf( buf, buflen, "RSA - The random generator failed to generate non-zeros" );
234#endif /* POLARSSL_RSA_C */
235
236#if defined(POLARSSL_SSL_TLS_C)
237        if( use_ret == -(POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE) )
238            snprintf( buf, buflen, "SSL - The requested feature is not available" );
239        if( use_ret == -(POLARSSL_ERR_SSL_BAD_INPUT_DATA) )
240            snprintf( buf, buflen, "SSL - Bad input parameters to function" );
241        if( use_ret == -(POLARSSL_ERR_SSL_INVALID_MAC) )
242            snprintf( buf, buflen, "SSL - Verification of the message MAC failed" );
243        if( use_ret == -(POLARSSL_ERR_SSL_INVALID_RECORD) )
244            snprintf( buf, buflen, "SSL - An invalid SSL record was received" );
245        if( use_ret == -(POLARSSL_ERR_SSL_CONN_EOF) )
246            snprintf( buf, buflen, "SSL - The connection indicated an EOF" );
247        if( use_ret == -(POLARSSL_ERR_SSL_UNKNOWN_CIPHER) )
248            snprintf( buf, buflen, "SSL - An unknown cipher was received" );
249        if( use_ret == -(POLARSSL_ERR_SSL_NO_CIPHER_CHOSEN) )
250            snprintf( buf, buflen, "SSL - The server has no ciphersuites in common with the client" );
251        if( use_ret == -(POLARSSL_ERR_SSL_NO_SESSION_FOUND) )
252            snprintf( buf, buflen, "SSL - No session to recover was found" );
253        if( use_ret == -(POLARSSL_ERR_SSL_NO_CLIENT_CERTIFICATE) )
254            snprintf( buf, buflen, "SSL - No client certification received from the client, but required by the authentication mode" );
255        if( use_ret == -(POLARSSL_ERR_SSL_CERTIFICATE_TOO_LARGE) )
256            snprintf( buf, buflen, "SSL - DESCRIPTION MISSING" );
257        if( use_ret == -(POLARSSL_ERR_SSL_CERTIFICATE_REQUIRED) )
258            snprintf( buf, buflen, "SSL - The own certificate is not set, but needed by the server" );
259        if( use_ret == -(POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED) )
260            snprintf( buf, buflen, "SSL - The own private key is not set, but needed" );
261        if( use_ret == -(POLARSSL_ERR_SSL_CA_CHAIN_REQUIRED) )
262            snprintf( buf, buflen, "SSL - No CA Chain is set, but required to operate" );
263        if( use_ret == -(POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE) )
264            snprintf( buf, buflen, "SSL - An unexpected message was received from our peer" );
265        if( use_ret == -(POLARSSL_ERR_SSL_FATAL_ALERT_MESSAGE) )
266        {
267            snprintf( buf, buflen, "SSL - A fatal alert message was received from our peer" );
268            return;
269        }
270        if( use_ret == -(POLARSSL_ERR_SSL_PEER_VERIFY_FAILED) )
271            snprintf( buf, buflen, "SSL - Verification of our peer failed" );
272        if( use_ret == -(POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY) )
273            snprintf( buf, buflen, "SSL - The peer notified us that the connection is going to be closed" );
274        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO) )
275            snprintf( buf, buflen, "SSL - Processing of the ClientHello handshake message failed" );
276        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO) )
277            snprintf( buf, buflen, "SSL - Processing of the ServerHello handshake message failed" );
278        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE) )
279            snprintf( buf, buflen, "SSL - Processing of the Certificate handshake message failed" );
280        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST) )
281            snprintf( buf, buflen, "SSL - Processing of the CertificateRequest handshake message failed" );
282        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE) )
283            snprintf( buf, buflen, "SSL - Processing of the ServerKeyExchange handshake message failed" );
284        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO_DONE) )
285            snprintf( buf, buflen, "SSL - Processing of the ServerHelloDone handshake message failed" );
286        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE) )
287            snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed" );
288        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_DHM_RP) )
289            snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed in DHM Read Public" );
290        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_DHM_CS) )
291            snprintf( buf, buflen, "SSL - Processing of the ClientKeyExchange handshake message failed in DHM Calculate Secret" );
292        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY) )
293            snprintf( buf, buflen, "SSL - Processing of the CertificateVerify handshake message failed" );
294        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC) )
295            snprintf( buf, buflen, "SSL - Processing of the ChangeCipherSpec handshake message failed" );
296        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_FINISHED) )
297            snprintf( buf, buflen, "SSL - Processing of the Finished handshake message failed" );
298        if( use_ret == -(POLARSSL_ERR_SSL_MALLOC_FAILED) )
299            snprintf( buf, buflen, "SSL - Memory allocation failed" );
300        if( use_ret == -(POLARSSL_ERR_SSL_HW_ACCEL_FAILED) )
301            snprintf( buf, buflen, "SSL - Hardware acceleration function returned with error" );
302        if( use_ret == -(POLARSSL_ERR_SSL_HW_ACCEL_FALLTHROUGH) )
303            snprintf( buf, buflen, "SSL - Hardware acceleration function skipped / left alone data" );
304        if( use_ret == -(POLARSSL_ERR_SSL_COMPRESSION_FAILED) )
305            snprintf( buf, buflen, "SSL - Processing of the compression / decompression failed" );
306        if( use_ret == -(POLARSSL_ERR_SSL_BAD_HS_PROTOCOL_VERSION) )
307            snprintf( buf, buflen, "SSL - Handshake protocol not within min/max boundaries" );
308#endif /* POLARSSL_SSL_TLS_C */
309
310#if defined(POLARSSL_X509_PARSE_C)
311        if( use_ret == -(POLARSSL_ERR_X509_FEATURE_UNAVAILABLE) )
312            snprintf( buf, buflen, "X509 - Unavailable feature, e.g. RSA hashing/encryption combination" );
313        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_PEM) )
314            snprintf( buf, buflen, "X509 - The PEM-encoded certificate contains invalid elements, e.g. invalid character" );
315        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_FORMAT) )
316            snprintf( buf, buflen, "X509 - The certificate format is invalid, e.g. different type expected" );
317        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_VERSION) )
318            snprintf( buf, buflen, "X509 - The certificate version element is invalid" );
319        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_SERIAL) )
320            snprintf( buf, buflen, "X509 - The serial tag or value is invalid" );
321        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_ALG) )
322            snprintf( buf, buflen, "X509 - The algorithm tag or value is invalid" );
323        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_NAME) )
324            snprintf( buf, buflen, "X509 - The name tag or value is invalid" );
325        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_DATE) )
326            snprintf( buf, buflen, "X509 - The date tag or value is invalid" );
327        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_PUBKEY) )
328            snprintf( buf, buflen, "X509 - The pubkey tag or value is invalid (only RSA is supported)" );
329        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_SIGNATURE) )
330            snprintf( buf, buflen, "X509 - The signature tag or value invalid" );
331        if( use_ret == -(POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS) )
332            snprintf( buf, buflen, "X509 - The extension tag or value is invalid" );
333        if( use_ret == -(POLARSSL_ERR_X509_CERT_UNKNOWN_VERSION) )
334            snprintf( buf, buflen, "X509 - Certificate or CRL has an unsupported version number" );
335        if( use_ret == -(POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG) )
336            snprintf( buf, buflen, "X509 - Signature algorithm (oid) is unsupported" );
337        if( use_ret == -(POLARSSL_ERR_X509_UNKNOWN_PK_ALG) )
338            snprintf( buf, buflen, "X509 - Key algorithm is unsupported (only RSA is supported)" );
339        if( use_ret == -(POLARSSL_ERR_X509_CERT_SIG_MISMATCH) )
340            snprintf( buf, buflen, "X509 - Certificate signature algorithms do not match. (see \\c ::x509_cert sig_oid)" );
341        if( use_ret == -(POLARSSL_ERR_X509_CERT_VERIFY_FAILED) )
342            snprintf( buf, buflen, "X509 - Certificate verification failed, e.g. CRL, CA or signature check failed" );
343        if( use_ret == -(POLARSSL_ERR_X509_KEY_INVALID_VERSION) )
344            snprintf( buf, buflen, "X509 - Unsupported RSA key version" );
345        if( use_ret == -(POLARSSL_ERR_X509_KEY_INVALID_FORMAT) )
346            snprintf( buf, buflen, "X509 - Invalid RSA key tag or value" );
347        if( use_ret == -(POLARSSL_ERR_X509_CERT_UNKNOWN_FORMAT) )
348            snprintf( buf, buflen, "X509 - Format not recognized as DER or PEM" );
349        if( use_ret == -(POLARSSL_ERR_X509_INVALID_INPUT) )
350            snprintf( buf, buflen, "X509 - Input invalid" );
351        if( use_ret == -(POLARSSL_ERR_X509_MALLOC_FAILED) )
352            snprintf( buf, buflen, "X509 - Allocation of memory failed" );
353        if( use_ret == -(POLARSSL_ERR_X509_FILE_IO_ERROR) )
354            snprintf( buf, buflen, "X509 - Read/write of file failed" );
355#endif /* POLARSSL_X509_PARSE_C */
356
357        if( strlen( buf ) == 0 )
358            snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
359    }
360
361    use_ret = ret & ~0xFF80;
362
363    if( use_ret == 0 )
364        return;
365
366    // If high level code is present, make a concatenation between both
367    // error strings.
368    //
369    len = strlen( buf );
370
371    if( len > 0 )
372    {
373        if( buflen - len < 5 )
374            return;
375
376        snprintf( buf + len, buflen - len, " : " );
377
378        buf += len + 3;
379        buflen -= len + 3;
380    }
381
382    // Low level error codes
383    //
384#if defined(POLARSSL_AES_C)
385    if( use_ret == -(POLARSSL_ERR_AES_INVALID_KEY_LENGTH) )
386        snprintf( buf, buflen, "AES - Invalid key length" );
387    if( use_ret == -(POLARSSL_ERR_AES_INVALID_INPUT_LENGTH) )
388        snprintf( buf, buflen, "AES - Invalid data input length" );
389#endif /* POLARSSL_AES_C */
390
391#if defined(POLARSSL_ASN1_PARSE_C)
392    if( use_ret == -(POLARSSL_ERR_ASN1_OUT_OF_DATA) )
393        snprintf( buf, buflen, "ASN1 - Out of data when parsing an ASN1 data structure" );
394    if( use_ret == -(POLARSSL_ERR_ASN1_UNEXPECTED_TAG) )
395        snprintf( buf, buflen, "ASN1 - ASN1 tag was of an unexpected value" );
396    if( use_ret == -(POLARSSL_ERR_ASN1_INVALID_LENGTH) )
397        snprintf( buf, buflen, "ASN1 - Error when trying to determine the length or invalid length" );
398    if( use_ret == -(POLARSSL_ERR_ASN1_LENGTH_MISMATCH) )
399        snprintf( buf, buflen, "ASN1 - Actual length differs from expected length" );
400    if( use_ret == -(POLARSSL_ERR_ASN1_INVALID_DATA) )
401        snprintf( buf, buflen, "ASN1 - Data is invalid. (not used)" );
402    if( use_ret == -(POLARSSL_ERR_ASN1_MALLOC_FAILED) )
403        snprintf( buf, buflen, "ASN1 - Memory allocation failed" );
404    if( use_ret == -(POLARSSL_ERR_ASN1_BUF_TOO_SMALL) )
405        snprintf( buf, buflen, "ASN1 - Buffer too small when writing ASN.1 data structure" );
406#endif /* POLARSSL_ASN1_PARSE_C */
407
408#if defined(POLARSSL_BASE64_C)
409    if( use_ret == -(POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL) )
410        snprintf( buf, buflen, "BASE64 - Output buffer too small" );
411    if( use_ret == -(POLARSSL_ERR_BASE64_INVALID_CHARACTER) )
412        snprintf( buf, buflen, "BASE64 - Invalid character in input" );
413#endif /* POLARSSL_BASE64_C */
414
415#if defined(POLARSSL_BIGNUM_C)
416    if( use_ret == -(POLARSSL_ERR_MPI_FILE_IO_ERROR) )
417        snprintf( buf, buflen, "BIGNUM - An error occurred while reading from or writing to a file" );
418    if( use_ret == -(POLARSSL_ERR_MPI_BAD_INPUT_DATA) )
419        snprintf( buf, buflen, "BIGNUM - Bad input parameters to function" );
420    if( use_ret == -(POLARSSL_ERR_MPI_INVALID_CHARACTER) )
421        snprintf( buf, buflen, "BIGNUM - There is an invalid character in the digit string" );
422    if( use_ret == -(POLARSSL_ERR_MPI_BUFFER_TOO_SMALL) )
423        snprintf( buf, buflen, "BIGNUM - The buffer is too small to write to" );
424    if( use_ret == -(POLARSSL_ERR_MPI_NEGATIVE_VALUE) )
425        snprintf( buf, buflen, "BIGNUM - The input arguments are negative or result in illegal output" );
426    if( use_ret == -(POLARSSL_ERR_MPI_DIVISION_BY_ZERO) )
427        snprintf( buf, buflen, "BIGNUM - The input argument for division is zero, which is not allowed" );
428    if( use_ret == -(POLARSSL_ERR_MPI_NOT_ACCEPTABLE) )
429        snprintf( buf, buflen, "BIGNUM - The input arguments are not acceptable" );
430    if( use_ret == -(POLARSSL_ERR_MPI_MALLOC_FAILED) )
431        snprintf( buf, buflen, "BIGNUM - Memory allocation failed" );
432#endif /* POLARSSL_BIGNUM_C */
433
434#if defined(POLARSSL_BLOWFISH_C)
435    if( use_ret == -(POLARSSL_ERR_BLOWFISH_INVALID_KEY_LENGTH) )
436        snprintf( buf, buflen, "BLOWFISH - Invalid key length" );
437    if( use_ret == -(POLARSSL_ERR_BLOWFISH_INVALID_INPUT_LENGTH) )
438        snprintf( buf, buflen, "BLOWFISH - Invalid data input length" );
439#endif /* POLARSSL_BLOWFISH_C */
440
441#if defined(POLARSSL_CAMELLIA_C)
442    if( use_ret == -(POLARSSL_ERR_CAMELLIA_INVALID_KEY_LENGTH) )
443        snprintf( buf, buflen, "CAMELLIA - Invalid key length" );
444    if( use_ret == -(POLARSSL_ERR_CAMELLIA_INVALID_INPUT_LENGTH) )
445        snprintf( buf, buflen, "CAMELLIA - Invalid data input length" );
446#endif /* POLARSSL_CAMELLIA_C */
447
448#if defined(POLARSSL_CTR_DRBG_C)
449    if( use_ret == -(POLARSSL_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED) )
450        snprintf( buf, buflen, "CTR_DRBG - The entropy source failed" );
451    if( use_ret == -(POLARSSL_ERR_CTR_DRBG_REQUEST_TOO_BIG) )
452        snprintf( buf, buflen, "CTR_DRBG - Too many random requested in single call" );
453    if( use_ret == -(POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG) )
454        snprintf( buf, buflen, "CTR_DRBG - Input too large (Entropy + additional)" );
455    if( use_ret == -(POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR) )
456        snprintf( buf, buflen, "CTR_DRBG - Read/write error in file" );
457#endif /* POLARSSL_CTR_DRBG_C */
458
459#if defined(POLARSSL_DES_C)
460    if( use_ret == -(POLARSSL_ERR_DES_INVALID_INPUT_LENGTH) )
461        snprintf( buf, buflen, "DES - The data input has an invalid length" );
462#endif /* POLARSSL_DES_C */
463
464#if defined(POLARSSL_ENTROPY_C)
465    if( use_ret == -(POLARSSL_ERR_ENTROPY_SOURCE_FAILED) )
466        snprintf( buf, buflen, "ENTROPY - Critical entropy source failure" );
467    if( use_ret == -(POLARSSL_ERR_ENTROPY_MAX_SOURCES) )
468        snprintf( buf, buflen, "ENTROPY - No more sources can be added" );
469    if( use_ret == -(POLARSSL_ERR_ENTROPY_NO_SOURCES_DEFINED) )
470        snprintf( buf, buflen, "ENTROPY - No sources have been added to poll" );
471#endif /* POLARSSL_ENTROPY_C */
472
473#if defined(POLARSSL_GCM_C)
474    if( use_ret == -(POLARSSL_ERR_GCM_AUTH_FAILED) )
475        snprintf( buf, buflen, "GCM - Authenticated decryption failed" );
476    if( use_ret == -(POLARSSL_ERR_GCM_BAD_INPUT) )
477        snprintf( buf, buflen, "GCM - Bad input parameters to function" );
478#endif /* POLARSSL_GCM_C */
479
480#if defined(POLARSSL_MD2_C)
481    if( use_ret == -(POLARSSL_ERR_MD2_FILE_IO_ERROR) )
482        snprintf( buf, buflen, "MD2 - Read/write error in file" );
483#endif /* POLARSSL_MD2_C */
484
485#if defined(POLARSSL_MD4_C)
486    if( use_ret == -(POLARSSL_ERR_MD4_FILE_IO_ERROR) )
487        snprintf( buf, buflen, "MD4 - Read/write error in file" );
488#endif /* POLARSSL_MD4_C */
489
490#if defined(POLARSSL_MD5_C)
491    if( use_ret == -(POLARSSL_ERR_MD5_FILE_IO_ERROR) )
492        snprintf( buf, buflen, "MD5 - Read/write error in file" );
493#endif /* POLARSSL_MD5_C */
494
495#if defined(POLARSSL_NET_C)
496    if( use_ret == -(POLARSSL_ERR_NET_UNKNOWN_HOST) )
497        snprintf( buf, buflen, "NET - Failed to get an IP address for the given hostname" );
498    if( use_ret == -(POLARSSL_ERR_NET_SOCKET_FAILED) )
499        snprintf( buf, buflen, "NET - Failed to open a socket" );
500    if( use_ret == -(POLARSSL_ERR_NET_CONNECT_FAILED) )
501        snprintf( buf, buflen, "NET - The connection to the given server / port failed" );
502    if( use_ret == -(POLARSSL_ERR_NET_BIND_FAILED) )
503        snprintf( buf, buflen, "NET - Binding of the socket failed" );
504    if( use_ret == -(POLARSSL_ERR_NET_LISTEN_FAILED) )
505        snprintf( buf, buflen, "NET - Could not listen on the socket" );
506    if( use_ret == -(POLARSSL_ERR_NET_ACCEPT_FAILED) )
507        snprintf( buf, buflen, "NET - Could not accept the incoming connection" );
508    if( use_ret == -(POLARSSL_ERR_NET_RECV_FAILED) )
509        snprintf( buf, buflen, "NET - Reading information from the socket failed" );
510    if( use_ret == -(POLARSSL_ERR_NET_SEND_FAILED) )
511        snprintf( buf, buflen, "NET - Sending information through the socket failed" );
512    if( use_ret == -(POLARSSL_ERR_NET_CONN_RESET) )
513        snprintf( buf, buflen, "NET - Connection was reset by peer" );
514    if( use_ret == -(POLARSSL_ERR_NET_WANT_READ) )
515        snprintf( buf, buflen, "NET - Connection requires a read call" );
516    if( use_ret == -(POLARSSL_ERR_NET_WANT_WRITE) )
517        snprintf( buf, buflen, "NET - Connection requires a write call" );
518#endif /* POLARSSL_NET_C */
519
520#if defined(POLARSSL_PADLOCK_C)
521    if( use_ret == -(POLARSSL_ERR_PADLOCK_DATA_MISALIGNED) )
522        snprintf( buf, buflen, "PADLOCK - Input data should be aligned" );
523#endif /* POLARSSL_PADLOCK_C */
524
525#if defined(POLARSSL_PBKDF2_C)
526    if( use_ret == -(POLARSSL_ERR_PBKDF2_BAD_INPUT_DATA) )
527        snprintf( buf, buflen, "PBKDF2 - Bad input parameters to function" );
528#endif /* POLARSSL_PBKDF2_C */
529
530#if defined(POLARSSL_SHA1_C)
531    if( use_ret == -(POLARSSL_ERR_SHA1_FILE_IO_ERROR) )
532        snprintf( buf, buflen, "SHA1 - Read/write error in file" );
533#endif /* POLARSSL_SHA1_C */
534
535#if defined(POLARSSL_SHA2_C)
536    if( use_ret == -(POLARSSL_ERR_SHA2_FILE_IO_ERROR) )
537        snprintf( buf, buflen, "SHA2 - Read/write error in file" );
538#endif /* POLARSSL_SHA2_C */
539
540#if defined(POLARSSL_SHA4_C)
541    if( use_ret == -(POLARSSL_ERR_SHA4_FILE_IO_ERROR) )
542        snprintf( buf, buflen, "SHA4 - Read/write error in file" );
543#endif /* POLARSSL_SHA4_C */
544
545#if defined(POLARSSL_XTEA_C)
546    if( use_ret == -(POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH) )
547        snprintf( buf, buflen, "XTEA - The data input has an invalid length" );
548#endif /* POLARSSL_XTEA_C */
549
550    if( strlen( buf ) != 0 )
551        return;
552
553    snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
554}
555
556#else /* POLARSSL_ERROR_C */
557
558#if defined(POLARSSL_ERROR_STRERROR_DUMMY)
559
560#include <string.h>
561
562/*
563 * Provide an non-function in case POLARSSL_ERROR_C is not defined
564 */
565void error_strerror( int ret, char *buf, size_t buflen )
566{
567    ((void) ret);
568
569    if( buflen > 0 )
570        buf[0] = '\0';
571}
572
573#endif /* POLARSSL_ERROR_STRERROR_DUMMY */
574#endif /* POLARSSL_ERROR_C */