lib/gnutls_errors.c

   1 /*
   2  * Copyright (C) 2000-2012 Free Software Foundation, Inc.
   3  *
   4  * Author: Nikos Mavrogiannopoulos
   5  *
   6  * This file is part of GnuTLS.
   7  *
   8  * The GnuTLS is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  20  *
  21  */
  22
  23 #include <gnutls_int.h>
  24 #include "gnutls_errors.h"
  25 #include <libtasn1.h>
  26 #ifdef STDC_HEADERS
  27 #include <stdarg.h>
  28 #endif
  29
  30 /* I18n of error codes. */
  31 #include "gettext.h"
  32 #define _(String) dgettext (PACKAGE, String)
  33 #define N_(String) gettext_noop (String)
  34
  35 #define ERROR_ENTRY(desc, name, fatal) \
  36         { desc, #name, name, fatal}
  37
  38 struct gnutls_error_entry
  39 {
  40   const char *desc;
  41   const char *_name;
  42   int number;
  43   int fatal;                    /* whether this error is fatal and the session for handshake
  44                                  * should be terminated.
  45                                  */
  46 };
  47 typedef struct gnutls_error_entry gnutls_error_entry;
  48
  49 static const gnutls_error_entry error_algorithms[] = {
  50   /* "Short Description", Error code define, critical (0,1) -- 1 in most cases */
  51   ERROR_ENTRY (N_("Success."), GNUTLS_E_SUCCESS, 0),
  52   ERROR_ENTRY (N_("Could not negotiate a supported cipher suite."),
  53                GNUTLS_E_UNKNOWN_CIPHER_SUITE, 1),
  54   ERROR_ENTRY (N_("No or insufficient priorities were set."),
  55                GNUTLS_E_NO_PRIORITIES_WERE_SET, 1),
  56   ERROR_ENTRY (N_("The cipher type is unsupported."),
  57                GNUTLS_E_UNKNOWN_CIPHER_TYPE, 1),
  58   ERROR_ENTRY (N_("The certificate and the given key do not match."),
  59                GNUTLS_E_CERTIFICATE_KEY_MISMATCH, 1),
  60   ERROR_ENTRY (N_("Could not negotiate a supported compression method."),
  61                GNUTLS_E_UNKNOWN_COMPRESSION_ALGORITHM, 1),
  62   ERROR_ENTRY (N_("An unknown public key algorithm was encountered."),
  63                GNUTLS_E_UNKNOWN_PK_ALGORITHM, 1),
  64
  65   ERROR_ENTRY (N_("An algorithm that is not enabled was negotiated."),
  66                GNUTLS_E_UNWANTED_ALGORITHM, 1),
  67   ERROR_ENTRY (N_("A record packet with illegal version was received."),
  68                GNUTLS_E_UNSUPPORTED_VERSION_PACKET, 1),
  69   ERROR_ENTRY (N_
  70                ("The Diffie-Hellman prime sent by the server is not acceptable (not long enough)."),
  71                GNUTLS_E_DH_PRIME_UNACCEPTABLE, 1),
  72   ERROR_ENTRY (N_("A TLS packet with unexpected length was received."),
  73                GNUTLS_E_UNEXPECTED_PACKET_LENGTH, 1),
  74   ERROR_ENTRY (N_("The TLS connection was non-properly terminated."),
  75                GNUTLS_E_PREMATURE_TERMINATION, 1),
  76   ERROR_ENTRY (N_
  77                ("The specified session has been invalidated for some reason."),
  78                GNUTLS_E_INVALID_SESSION, 1),
  79
  80   ERROR_ENTRY (N_("GnuTLS internal error."), GNUTLS_E_INTERNAL_ERROR, 1),
  81   ERROR_ENTRY (N_("An illegal TLS extension was received."),
  82                GNUTLS_E_RECEIVED_ILLEGAL_EXTENSION, 1),
  83   ERROR_ENTRY (N_("A TLS fatal alert has been received."),
  84                GNUTLS_E_FATAL_ALERT_RECEIVED, 1),
  85   ERROR_ENTRY (N_("An unexpected TLS packet was received."),
  86                GNUTLS_E_UNEXPECTED_PACKET, 1),
  87   ERROR_ENTRY (N_("A TLS warning alert has been received."),
  88                GNUTLS_E_WARNING_ALERT_RECEIVED, 0),
  89   ERROR_ENTRY (N_
  90                ("An error was encountered at the TLS Finished packet calculation."),
  91                GNUTLS_E_ERROR_IN_FINISHED_PACKET, 1),
  92   ERROR_ENTRY (N_("No certificate was found."),
  93                GNUTLS_E_NO_CERTIFICATE_FOUND, 1),
  94   ERROR_ENTRY (N_("The given DSA key is incompatible with the selected TLS protocol."),
  95                GNUTLS_E_INCOMPAT_DSA_KEY_WITH_TLS_PROTOCOL, 1),
  96
  97   ERROR_ENTRY (N_("There is already a crypto algorithm with lower priority."),
  98                GNUTLS_E_CRYPTO_ALREADY_REGISTERED, 1),
  99
 100   ERROR_ENTRY (N_("No temporary RSA parameters were found."),
 101                GNUTLS_E_NO_TEMPORARY_RSA_PARAMS, 1),
 102   ERROR_ENTRY (N_("No temporary DH parameters were found."),
 103                GNUTLS_E_NO_TEMPORARY_DH_PARAMS, 1),
 104   ERROR_ENTRY (N_("An unexpected TLS handshake packet was received."),
 105                GNUTLS_E_UNEXPECTED_HANDSHAKE_PACKET, 1),
 106   ERROR_ENTRY (N_("The scanning of a large integer has failed."),
 107                GNUTLS_E_MPI_SCAN_FAILED, 1),
 108   ERROR_ENTRY (N_("Could not export a large integer."),
 109                GNUTLS_E_MPI_PRINT_FAILED, 1),
 110   ERROR_ENTRY (N_("Decryption has failed."), GNUTLS_E_DECRYPTION_FAILED, 1),
 111   ERROR_ENTRY (N_("Encryption has failed."), GNUTLS_E_ENCRYPTION_FAILED, 1),
 112   ERROR_ENTRY (N_("Public key decryption has failed."),
 113                GNUTLS_E_PK_DECRYPTION_FAILED, 1),
 114   ERROR_ENTRY (N_("Public key encryption has failed."),
 115                GNUTLS_E_PK_ENCRYPTION_FAILED, 1),
 116   ERROR_ENTRY (N_("Public key signing has failed."), GNUTLS_E_PK_SIGN_FAILED,
 117                1),
 118   ERROR_ENTRY (N_("Public key signature verification has failed."),
 119                GNUTLS_E_PK_SIG_VERIFY_FAILED, 1),
 120   ERROR_ENTRY (N_("Decompression of the TLS record packet has failed."),
 121                GNUTLS_E_DECOMPRESSION_FAILED, 1),
 122   ERROR_ENTRY (N_("Compression of the TLS record packet has failed."),
 123                GNUTLS_E_COMPRESSION_FAILED, 1),
 124
 125   ERROR_ENTRY (N_("Internal error in memory allocation."),
 126                GNUTLS_E_MEMORY_ERROR, 1),
 127   ERROR_ENTRY (N_("An unimplemented or disabled feature has been requested."),
 128                GNUTLS_E_UNIMPLEMENTED_FEATURE, 1),
 129   ERROR_ENTRY (N_("Insufficient credentials for that request."),
 130                GNUTLS_E_INSUFFICIENT_CREDENTIALS, 1),
 131   ERROR_ENTRY (N_("Error in password file."), GNUTLS_E_SRP_PWD_ERROR, 1),
 132   ERROR_ENTRY (N_("Wrong padding in PKCS1 packet."), GNUTLS_E_PKCS1_WRONG_PAD,
 133                1),
 134   ERROR_ENTRY (N_("The requested session has expired."), GNUTLS_E_EXPIRED, 1),
 135   ERROR_ENTRY (N_("Hashing has failed."), GNUTLS_E_HASH_FAILED, 1),
 136   ERROR_ENTRY (N_("Base64 decoding error."), GNUTLS_E_BASE64_DECODING_ERROR,
 137                1),
 138   ERROR_ENTRY (N_("Base64 unexpected header error."),
 139                GNUTLS_E_BASE64_UNEXPECTED_HEADER_ERROR,
 140                1),
 141   ERROR_ENTRY (N_("Base64 encoding error."), GNUTLS_E_BASE64_ENCODING_ERROR,
 142                1),
 143   ERROR_ENTRY (N_("Parsing error in password file."),
 144                GNUTLS_E_SRP_PWD_PARSING_ERROR, 1),
 145   ERROR_ENTRY (N_("The requested data were not available."),
 146                GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE, 1),
 147   ERROR_ENTRY (N_("Error in the pull function."), GNUTLS_E_PULL_ERROR, 1),
 148   ERROR_ENTRY (N_("Error in the push function."), GNUTLS_E_PUSH_ERROR, 1),
 149   ERROR_ENTRY (N_
 150                ("The upper limit of record packet sequence numbers has been reached. Wow!"),
 151                GNUTLS_E_RECORD_LIMIT_REACHED, 1),
 152   ERROR_ENTRY (N_("Error in the certificate."), GNUTLS_E_CERTIFICATE_ERROR,
 153                1),
 154   ERROR_ENTRY (N_("Unknown Subject Alternative name in X.509 certificate."),
 155                GNUTLS_E_X509_UNKNOWN_SAN, 1),
 156
 157   ERROR_ENTRY (N_("Unsupported critical extension in X.509 certificate."),
 158                GNUTLS_E_X509_UNSUPPORTED_CRITICAL_EXTENSION, 1),
 159   ERROR_ENTRY (N_("Unsupported extension in X.509 certificate."),
 160                GNUTLS_E_X509_UNSUPPORTED_EXTENSION, 1),
 161   ERROR_ENTRY (N_("Key usage violation in certificate has been detected."),
 162                GNUTLS_E_KEY_USAGE_VIOLATION, 1),
 163   ERROR_ENTRY (N_("Resource temporarily unavailable, try again."),
 164                GNUTLS_E_AGAIN, 0),
 165   ERROR_ENTRY (N_("The transmitted packet is too large (EMSGSIZE)."),
 166                GNUTLS_E_LARGE_PACKET, 0),
 167   ERROR_ENTRY (N_("Function was interrupted."), GNUTLS_E_INTERRUPTED, 0),
 168   ERROR_ENTRY (N_("Rehandshake was requested by the peer."),
 169                GNUTLS_E_REHANDSHAKE, 0),
 170   ERROR_ENTRY (N_
 171                ("TLS Application data were received, while expecting handshake data."),
 172                GNUTLS_E_GOT_APPLICATION_DATA, 1),
 173   ERROR_ENTRY (N_("Error in Database backend."), GNUTLS_E_DB_ERROR, 1),
 174   ERROR_ENTRY (N_("The certificate type is not supported."),
 175                GNUTLS_E_UNSUPPORTED_CERTIFICATE_TYPE, 1),
 176   ERROR_ENTRY (N_("The given memory buffer is too short to hold parameters."),
 177                GNUTLS_E_SHORT_MEMORY_BUFFER, 1),
 178   ERROR_ENTRY (N_("The request is invalid."), GNUTLS_E_INVALID_REQUEST, 1),
 179   ERROR_ENTRY (N_("The cookie was bad."), GNUTLS_E_BAD_COOKIE, 1),
 180   ERROR_ENTRY (N_("An illegal parameter has been received."),
 181                GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER, 1),
 182   ERROR_ENTRY (N_("An illegal parameter was found."),
 183                GNUTLS_E_ILLEGAL_PARAMETER, 1),
 184   ERROR_ENTRY (N_("Error while reading file."), GNUTLS_E_FILE_ERROR, 1),
 185
 186   ERROR_ENTRY (N_("ASN1 parser: Element was not found."),
 187                GNUTLS_E_ASN1_ELEMENT_NOT_FOUND, 1),
 188   ERROR_ENTRY (N_("ASN1 parser: Identifier was not found"),
 189                GNUTLS_E_ASN1_IDENTIFIER_NOT_FOUND, 1),
 190   ERROR_ENTRY (N_("ASN1 parser: Error in DER parsing."),
 191                GNUTLS_E_ASN1_DER_ERROR, 1),
 192   ERROR_ENTRY (N_("ASN1 parser: Value was not found."),
 193                GNUTLS_E_ASN1_VALUE_NOT_FOUND, 1),
 194   ERROR_ENTRY (N_("ASN1 parser: Generic parsing error."),
 195                GNUTLS_E_ASN1_GENERIC_ERROR, 1),
 196   ERROR_ENTRY (N_("ASN1 parser: Value is not valid."),
 197                GNUTLS_E_ASN1_VALUE_NOT_VALID, 1),
 198   ERROR_ENTRY (N_("ASN1 parser: Error in TAG."), GNUTLS_E_ASN1_TAG_ERROR, 1),
 199   ERROR_ENTRY (N_("ASN1 parser: error in implicit tag"),
 200                GNUTLS_E_ASN1_TAG_IMPLICIT, 1),
 201   ERROR_ENTRY (N_("ASN1 parser: Error in type 'ANY'."),
 202                GNUTLS_E_ASN1_TYPE_ANY_ERROR, 1),
 203   ERROR_ENTRY (N_("ASN1 parser: Syntax error."), GNUTLS_E_ASN1_SYNTAX_ERROR,
 204                1),
 205   ERROR_ENTRY (N_("ASN1 parser: Overflow in DER parsing."),
 206                GNUTLS_E_ASN1_DER_OVERFLOW, 1),
 207
 208   ERROR_ENTRY (N_("Too many empty record packets have been received."),
 209                GNUTLS_E_TOO_MANY_EMPTY_PACKETS, 1),
 210   ERROR_ENTRY (N_("Too many handshake packets have been received."),
 211                GNUTLS_E_TOO_MANY_HANDSHAKE_PACKETS, 1),
 212   ERROR_ENTRY (N_("The crypto library version is too old."),
 213                GNUTLS_E_INCOMPATIBLE_GCRYPT_LIBRARY, 1),
 214
 215   ERROR_ENTRY (N_("The tasn1 library version is too old."),
 216                GNUTLS_E_INCOMPATIBLE_LIBTASN1_LIBRARY, 1),
 217   ERROR_ENTRY (N_("The OpenPGP User ID is revoked."),
 218                GNUTLS_E_OPENPGP_UID_REVOKED, 1),
 219   ERROR_ENTRY (N_("The OpenPGP key has not a preferred key set."),
 220                GNUTLS_E_OPENPGP_PREFERRED_KEY_ERROR, 1),
 221   ERROR_ENTRY (N_("Error loading the keyring."),
 222                GNUTLS_E_OPENPGP_KEYRING_ERROR, 1),
 223   ERROR_ENTRY (N_("The initialization of crypto backend has failed."),
 224                GNUTLS_E_CRYPTO_INIT_FAILED, 1),
 225   ERROR_ENTRY (N_("No supported compression algorithms have been found."),
 226                GNUTLS_E_NO_COMPRESSION_ALGORITHMS, 1),
 227   ERROR_ENTRY (N_("No supported cipher suites have been found."),
 228                GNUTLS_E_NO_CIPHER_SUITES, 1),
 229   ERROR_ENTRY (N_("Could not get OpenPGP key."),
 230                GNUTLS_E_OPENPGP_GETKEY_FAILED, 1),
 231   ERROR_ENTRY (N_("Could not find OpenPGP subkey."),
 232                GNUTLS_E_OPENPGP_SUBKEY_ERROR, 1),
 233   ERROR_ENTRY (N_("Safe renegotiation failed."),
 234                GNUTLS_E_SAFE_RENEGOTIATION_FAILED, 1),
 235   ERROR_ENTRY (N_("Unsafe renegotiation denied."),
 236                GNUTLS_E_UNSAFE_RENEGOTIATION_DENIED, 1),
 237
 238   ERROR_ENTRY (N_("The SRP username supplied is illegal."),
 239                GNUTLS_E_ILLEGAL_SRP_USERNAME, 1),
 240   ERROR_ENTRY (N_("The SRP username supplied is unknown."),
 241                GNUTLS_E_UNKNOWN_SRP_USERNAME, 1),
 242
 243   ERROR_ENTRY (N_("The OpenPGP fingerprint is not supported."),
 244                GNUTLS_E_OPENPGP_FINGERPRINT_UNSUPPORTED, 1),
 245   ERROR_ENTRY (N_("The signature algorithm is not supported."),
 246                GNUTLS_E_UNSUPPORTED_SIGNATURE_ALGORITHM, 1),
 247   ERROR_ENTRY (N_("The certificate has unsupported attributes."),
 248                GNUTLS_E_X509_UNSUPPORTED_ATTRIBUTE, 1),
 249   ERROR_ENTRY (N_("The OID is not supported."), GNUTLS_E_X509_UNSUPPORTED_OID,
 250                1),
 251   ERROR_ENTRY (N_("The hash algorithm is unknown."),
 252                GNUTLS_E_UNKNOWN_HASH_ALGORITHM, 1),
 253   ERROR_ENTRY (N_("The PKCS structure's content type is unknown."),
 254                GNUTLS_E_UNKNOWN_PKCS_CONTENT_TYPE, 1),
 255   ERROR_ENTRY (N_("The PKCS structure's bag type is unknown."),
 256                GNUTLS_E_UNKNOWN_PKCS_BAG_TYPE, 1),
 257   ERROR_ENTRY (N_("The given password contains invalid characters."),
 258                GNUTLS_E_INVALID_PASSWORD, 1),
 259   ERROR_ENTRY (N_("The Message Authentication Code verification failed."),
 260                GNUTLS_E_MAC_VERIFY_FAILED, 1),
 261   ERROR_ENTRY (N_("Some constraint limits were reached."),
 262                GNUTLS_E_CONSTRAINT_ERROR, 1),
 263   ERROR_ENTRY (N_("Failed to acquire random data."), GNUTLS_E_RANDOM_FAILED,
 264                1),
 265
 266   ERROR_ENTRY (N_("Received a TLS/IA Intermediate Phase Finished message"),
 267                GNUTLS_E_WARNING_IA_IPHF_RECEIVED, 0),
 268   ERROR_ENTRY (N_("Received a TLS/IA Final Phase Finished message"),
 269                GNUTLS_E_WARNING_IA_FPHF_RECEIVED, 0),
 270   ERROR_ENTRY (N_("Verifying TLS/IA phase checksum failed"),
 271                GNUTLS_E_IA_VERIFY_FAILED, 1),
 272
 273   ERROR_ENTRY (N_("The specified algorithm or protocol is unknown."),
 274                GNUTLS_E_UNKNOWN_ALGORITHM, 1),
 275
 276   ERROR_ENTRY (N_("The handshake data size is too large."),
 277                GNUTLS_E_HANDSHAKE_TOO_LARGE, 1),
 278
 279   ERROR_ENTRY (N_("Error opening /dev/crypto"),
 280                GNUTLS_E_CRYPTODEV_DEVICE_ERROR, 1),
 281
 282   ERROR_ENTRY (N_("Error interfacing with /dev/crypto"),
 283                GNUTLS_E_CRYPTODEV_IOCTL_ERROR, 1),
 284   ERROR_ENTRY (N_("Peer has terminated the connection"),
 285                GNUTLS_E_SESSION_EOF, 1),
 286   ERROR_ENTRY (N_("Channel binding data not available"),
 287                GNUTLS_E_CHANNEL_BINDING_NOT_AVAILABLE, 1),
 288
 289   ERROR_ENTRY (N_("PKCS #11 error."),
 290                GNUTLS_E_PKCS11_ERROR, 1),
 291   ERROR_ENTRY (N_("PKCS #11 initialization error."),
 292                GNUTLS_E_PKCS11_LOAD_ERROR, 1),
 293   ERROR_ENTRY (N_("Error in parsing."),
 294                GNUTLS_E_PARSING_ERROR, 1),
 295   ERROR_ENTRY (N_("PKCS #11 error in PIN."),
 296                GNUTLS_E_PKCS11_PIN_ERROR, 1),
 297   ERROR_ENTRY (N_("PKCS #11 PIN should be saved."),
 298                GNUTLS_E_PKCS11_ERROR, 1),
 299   ERROR_ENTRY (N_("PKCS #11 error in slot"),
 300                GNUTLS_E_PKCS11_SLOT_ERROR, 1),
 301   ERROR_ENTRY (N_("Thread locking error"),
 302                GNUTLS_E_LOCKING_ERROR, 1),
 303   ERROR_ENTRY (N_("PKCS #11 error in attribute"),
 304                GNUTLS_E_PKCS11_ATTRIBUTE_ERROR, 1),
 305   ERROR_ENTRY (N_("PKCS #11 error in device"),
 306                GNUTLS_E_PKCS11_DEVICE_ERROR, 1),
 307   ERROR_ENTRY (N_("PKCS #11 error in data"),
 308                GNUTLS_E_PKCS11_DATA_ERROR, 1),
 309   ERROR_ENTRY (N_("PKCS #11 unsupported feature"),
 310                GNUTLS_E_PKCS11_UNSUPPORTED_FEATURE_ERROR, 1),
 311   ERROR_ENTRY (N_("PKCS #11 error in key"),
 312                GNUTLS_E_PKCS11_KEY_ERROR, 1),
 313   ERROR_ENTRY (N_("PKCS #11 PIN expired"),
 314                GNUTLS_E_PKCS11_PIN_EXPIRED, 1),
 315   ERROR_ENTRY (N_("PKCS #11 PIN locked"),
 316                GNUTLS_E_PKCS11_PIN_LOCKED, 1),
 317   ERROR_ENTRY (N_("PKCS #11 error in session"),
 318                GNUTLS_E_PKCS11_SESSION_ERROR, 1),
 319   ERROR_ENTRY (N_("PKCS #11 error in signature"),
 320                GNUTLS_E_PKCS11_SIGNATURE_ERROR, 1),
 321   ERROR_ENTRY (N_("PKCS #11 error in token"),
 322                GNUTLS_E_PKCS11_TOKEN_ERROR, 1),
 323   ERROR_ENTRY (N_("PKCS #11 user error"),
 324                GNUTLS_E_PKCS11_USER_ERROR, 1),
 325   ERROR_ENTRY (N_("The operation timed out"),
 326                GNUTLS_E_TIMEDOUT, 1),
 327   ERROR_ENTRY (N_("The operation was cancelled due to user error"),
 328                GNUTLS_E_USER_ERROR, 1),
 329   ERROR_ENTRY (N_("No supported ECC curves were found"),
 330                GNUTLS_E_ECC_NO_SUPPORTED_CURVES, 1),
 331   ERROR_ENTRY (N_("The curve is unsupported"),
 332                GNUTLS_E_ECC_UNSUPPORTED_CURVE, 1),
 333   ERROR_ENTRY (N_("The requested PKCS #11 object is not available"),
 334                GNUTLS_E_PKCS11_REQUESTED_OBJECT_NOT_AVAILBLE, 1),
 335   ERROR_ENTRY (N_("The provided X.509 certificate list is not sorted (in subject to issuer order)"),
 336                GNUTLS_E_CERTIFICATE_LIST_UNSORTED, 1),
 337   {NULL, NULL, 0, 0}
 338 };
 339
 340 /**
 341  * gnutls_error_is_fatal:
 342  * @error: is a GnuTLS error code, a negative error code
 343  *
 344  * If a GnuTLS function returns a negative error code you may feed that
 345  * value to this function to see if the error condition is fatal.
 346  * Note that you may also want to check the error code manually, since some
 347  * non-fatal errors to the protocol (such as a warning alert or
 348  * a rehandshake request) may be fatal for your program.
 349  *
 350  * This function is only useful if you are dealing with errors from
 351  * the record layer or the handshake layer.
 352  *
 353  * Returns: 1 if the error code is fatal, for positive @error values,
 354  *   0 is returned.  For unknown @error values, -1 is returned.
 355  **/
 356 int
 357 gnutls_error_is_fatal (int error)
 358 {
 359   int ret = 1;
 360   const gnutls_error_entry *p;
 361
 362   /* Input sanitzation.  Positive values are not errors at all, and
 363      definitely not fatal. */
 364   if (error > 0)
 365     return 0;
 366
 367   for (p = error_algorithms; p->desc != NULL; p++)
 368     {
 369       if (p->number == error)
 370         {
 371           ret = p->fatal;
 372           break;
 373         }
 374     }
 375
 376   return ret;
 377 }
 378
 379 /**
 380  * gnutls_perror:
 381  * @error: is a GnuTLS error code, a negative error code
 382  *
 383  * This function is like perror(). The only difference is that it
 384  * accepts an error number returned by a gnutls function.
 385  **/
 386 void
 387 gnutls_perror (int error)
 388 {
 389   fprintf (stderr, "GnuTLS error: %s\n", gnutls_strerror (error));
 390 }
 391
 392
 393 /**
 394  * gnutls_strerror:
 395  * @error: is a GnuTLS error code, a negative error code
 396  *
 397  * This function is similar to strerror.  The difference is that it
 398  * accepts an error number returned by a gnutls function; In case of
 399  * an unknown error a descriptive string is sent instead of %NULL.
 400  *
 401  * Error codes are always a negative error code.
 402  *
 403  * Returns: A string explaining the GnuTLS error message.
 404  **/
 405 const char *
 406 gnutls_strerror (int error)
 407 {
 408   const char *ret = NULL;
 409   const gnutls_error_entry *p;
 410
 411   for (p = error_algorithms; p->desc != NULL; p++)
 412     {
 413       if (p->number == error)
 414         {
 415           ret = p->desc;
 416           break;
 417         }
 418     }
 419
 420   /* avoid prefix */
 421   if (ret == NULL)
 422     return _("(unknown error code)");
 423
 424   return _(ret);
 425 }
 426
 427 /**
 428  * gnutls_strerror_name:
 429  * @error: is an error returned by a gnutls function.
 430  *
 431  * Return the GnuTLS error code define as a string.  For example,
 432  * gnutls_strerror_name (GNUTLS_E_DH_PRIME_UNACCEPTABLE) will return
 433  * the string "GNUTLS_E_DH_PRIME_UNACCEPTABLE".
 434  *
 435  * Returns: A string corresponding to the symbol name of the error
 436  * code.
 437  *
 438  * Since: 2.6.0
 439  **/
 440 const char *
 441 gnutls_strerror_name (int error)
 442 {
 443   const char *ret = NULL;
 444   const gnutls_error_entry *p;
 445
 446   for (p = error_algorithms; p->desc != NULL; p++)
 447     {
 448       if (p->number == error)
 449         {
 450           ret = p->_name;
 451           break;
 452         }
 453     }
 454
 455   return ret;
 456 }
 457
 458 int
 459 _gnutls_asn2err (int asn_err)
 460 {
 461   switch (asn_err)
 462     {
 463     case ASN1_FILE_NOT_FOUND:
 464       return GNUTLS_E_FILE_ERROR;
 465     case ASN1_ELEMENT_NOT_FOUND:
 466       return GNUTLS_E_ASN1_ELEMENT_NOT_FOUND;
 467     case ASN1_IDENTIFIER_NOT_FOUND:
 468       return GNUTLS_E_ASN1_IDENTIFIER_NOT_FOUND;
 469     case ASN1_DER_ERROR:
 470       return GNUTLS_E_ASN1_DER_ERROR;
 471     case ASN1_VALUE_NOT_FOUND:
 472       return GNUTLS_E_ASN1_VALUE_NOT_FOUND;
 473     case ASN1_GENERIC_ERROR:
 474       return GNUTLS_E_ASN1_GENERIC_ERROR;
 475     case ASN1_VALUE_NOT_VALID:
 476       return GNUTLS_E_ASN1_VALUE_NOT_VALID;
 477     case ASN1_TAG_ERROR:
 478       return GNUTLS_E_ASN1_TAG_ERROR;
 479     case ASN1_TAG_IMPLICIT:
 480       return GNUTLS_E_ASN1_TAG_IMPLICIT;
 481     case ASN1_ERROR_TYPE_ANY:
 482       return GNUTLS_E_ASN1_TYPE_ANY_ERROR;
 483     case ASN1_SYNTAX_ERROR:
 484       return GNUTLS_E_ASN1_SYNTAX_ERROR;
 485     case ASN1_MEM_ERROR:
 486       return GNUTLS_E_SHORT_MEMORY_BUFFER;
 487     case ASN1_MEM_ALLOC_ERROR:
 488       return GNUTLS_E_MEMORY_ERROR;
 489     case ASN1_DER_OVERFLOW:
 490       return GNUTLS_E_ASN1_DER_OVERFLOW;
 491     default:
 492       return GNUTLS_E_ASN1_GENERIC_ERROR;
 493     }
 494 }
 495
 496 void
 497 _gnutls_mpi_log (const char *prefix, bigint_t a)
 498 {
 499   size_t binlen = 0;
 500   void *binbuf;
 501   size_t hexlen;
 502   char *hexbuf;
 503   int res;
 504
 505   if (_gnutls_log_level < 2) return;
 506
 507   res = _gnutls_mpi_print (a, NULL, &binlen);
 508   if (res < 0 && res != GNUTLS_E_SHORT_MEMORY_BUFFER)
 509     {
 510       gnutls_assert ();
 511       _gnutls_hard_log ("MPI: %s can't print value (%d/%d)\n", prefix, res,
 512                         (int) binlen);
 513       return;
 514     }
 515
 516   if (binlen > 1024 * 1024)
 517     {
 518       gnutls_assert ();
 519       _gnutls_hard_log ("MPI: %s too large mpi (%d)\n", prefix, (int) binlen);
 520       return;
 521     }
 522
 523   binbuf = gnutls_malloc (binlen);
 524   if (!binbuf)
 525     {
 526       gnutls_assert ();
 527       _gnutls_hard_log ("MPI: %s out of memory (%d)\n", prefix, (int) binlen);
 528       return;
 529     }
 530
 531   res = _gnutls_mpi_print (a, binbuf, &binlen);
 532   if (res != 0)
 533     {
 534       gnutls_assert ();
 535       _gnutls_hard_log ("MPI: %s can't print value (%d/%d)\n", prefix, res,
 536                         (int) binlen);
 537       gnutls_free (binbuf);
 538       return;
 539     }
 540
 541   hexlen = 2 * binlen + 1;
 542   hexbuf = gnutls_malloc (hexlen);
 543
 544   if (!hexbuf)
 545     {
 546       gnutls_assert ();
 547       _gnutls_hard_log ("MPI: %s out of memory (hex %d)\n", prefix, (int) hexlen);
 548       gnutls_free (binbuf);
 549       return;
 550     }
 551
 552   _gnutls_bin2hex (binbuf, binlen, hexbuf, hexlen, NULL);
 553
 554   _gnutls_hard_log ("MPI: length: %d\n\t%s%s\n", (int) binlen, prefix,
 555                     hexbuf);
 556
 557   gnutls_free (hexbuf);
 558   gnutls_free (binbuf);
 559 }
 560
 561 /* this function will output a message using the
 562  * caller provided function
 563  */
 564 void
 565 _gnutls_log (int level, const char *fmt, ...)
 566 {
 567   va_list args;
 568   char *str;
 569   int ret;
 570
 571   if (_gnutls_log_func == NULL)
 572     return;
 573
 574   va_start (args, fmt);
 575   ret = vasprintf (&str, fmt, args);
 576   va_end (args);
 577
 578   if (ret >= 0)
 579     {
 580       _gnutls_log_func (level, str);
 581       free (str);
 582     }
 583 }
 584
 585 void
 586 _gnutls_audit_log (gnutls_session_t session, const char *fmt, ...)
 587 {
 588   va_list args;
 589   char *str;
 590   int ret;
 591
 592   if (_gnutls_audit_log_func == NULL && _gnutls_log_func == NULL)
 593     return;
 594
 595   va_start (args, fmt);
 596   ret = vasprintf (&str, fmt, args);
 597   va_end (args);
 598
 599   if (ret >= 0)
 600     {
 601       if (_gnutls_audit_log_func)
 602         _gnutls_audit_log_func (session, str);
 603       else
 604         _gnutls_log_func(1, str);
 605       free (str);
 606     }
 607 }
 608
 609 #ifndef DEBUG
 610 #ifndef C99_MACROS
 611
 612 /* Without C99 macros these functions have to
 613  * be called. This may affect performance.
 614  */
 615 void
 616 _gnutls_null_log (void *x, ...)
 617 {
 618   return;
 619 }
 620
 621 #endif /* C99_MACROS */
 622 #endif /* DEBUG */