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   ERROR_ENTRY (N_("A heartbeat pong message was received."),
  97                GNUTLS_E_HEARTBEAT_PONG_RECEIVED, 0),
  98   ERROR_ENTRY (N_("A heartbeat ping message was received."),
  99                GNUTLS_E_HEARTBEAT_PING_RECEIVED, 0),
 100   ERROR_ENTRY (N_("There is already a crypto algorithm with lower priority."),
 101                GNUTLS_E_CRYPTO_ALREADY_REGISTERED, 1),
 102
 103   ERROR_ENTRY (N_("No temporary RSA parameters were found."),
 104                GNUTLS_E_NO_TEMPORARY_RSA_PARAMS, 1),
 105   ERROR_ENTRY (N_("No temporary DH parameters were found."),
 106                GNUTLS_E_NO_TEMPORARY_DH_PARAMS, 1),
 107   ERROR_ENTRY (N_("An unexpected TLS handshake packet was received."),
 108                GNUTLS_E_UNEXPECTED_HANDSHAKE_PACKET, 1),
 109   ERROR_ENTRY (N_("The scanning of a large integer has failed."),
 110                GNUTLS_E_MPI_SCAN_FAILED, 1),
 111   ERROR_ENTRY (N_("Could not export a large integer."),
 112                GNUTLS_E_MPI_PRINT_FAILED, 1),
 113   ERROR_ENTRY (N_("Decryption has failed."), GNUTLS_E_DECRYPTION_FAILED, 1),
 114   ERROR_ENTRY (N_("Encryption has failed."), GNUTLS_E_ENCRYPTION_FAILED, 1),
 115   ERROR_ENTRY (N_("Public key decryption has failed."),
 116                GNUTLS_E_PK_DECRYPTION_FAILED, 1),
 117   ERROR_ENTRY (N_("Public key encryption has failed."),
 118                GNUTLS_E_PK_ENCRYPTION_FAILED, 1),
 119   ERROR_ENTRY (N_("Public key signing has failed."), GNUTLS_E_PK_SIGN_FAILED,
 120                1),
 121   ERROR_ENTRY (N_("Public key signature verification has failed."),
 122                GNUTLS_E_PK_SIG_VERIFY_FAILED, 1),
 123   ERROR_ENTRY (N_("Decompression of the TLS record packet has failed."),
 124                GNUTLS_E_DECOMPRESSION_FAILED, 1),
 125   ERROR_ENTRY (N_("Compression of the TLS record packet has failed."),
 126                GNUTLS_E_COMPRESSION_FAILED, 1),
 127
 128   ERROR_ENTRY (N_("Internal error in memory allocation."),
 129                GNUTLS_E_MEMORY_ERROR, 1),
 130   ERROR_ENTRY (N_("An unimplemented or disabled feature has been requested."),
 131                GNUTLS_E_UNIMPLEMENTED_FEATURE, 1),
 132   ERROR_ENTRY (N_("Insufficient credentials for that request."),
 133                GNUTLS_E_INSUFFICIENT_CREDENTIALS, 1),
 134   ERROR_ENTRY (N_("Error in password file."), GNUTLS_E_SRP_PWD_ERROR, 1),
 135   ERROR_ENTRY (N_("Wrong padding in PKCS1 packet."), GNUTLS_E_PKCS1_WRONG_PAD,
 136                1),
 137   ERROR_ENTRY (N_("The requested session has expired."), GNUTLS_E_EXPIRED, 1),
 138   ERROR_ENTRY (N_("Hashing has failed."), GNUTLS_E_HASH_FAILED, 1),
 139   ERROR_ENTRY (N_("Base64 decoding error."), GNUTLS_E_BASE64_DECODING_ERROR,
 140                1),
 141   ERROR_ENTRY (N_("Base64 unexpected header error."),
 142                GNUTLS_E_BASE64_UNEXPECTED_HEADER_ERROR,
 143                1),
 144   ERROR_ENTRY (N_("Base64 encoding error."), GNUTLS_E_BASE64_ENCODING_ERROR,
 145                1),
 146   ERROR_ENTRY (N_("Parsing error in password file."),
 147                GNUTLS_E_SRP_PWD_PARSING_ERROR, 1),
 148   ERROR_ENTRY (N_("The requested data were not available."),
 149                GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE, 1),
 150   ERROR_ENTRY (N_("Error in the pull function."), GNUTLS_E_PULL_ERROR, 1),
 151   ERROR_ENTRY (N_("Error in the push function."), GNUTLS_E_PUSH_ERROR, 1),
 152   ERROR_ENTRY (N_
 153                ("The upper limit of record packet sequence numbers has been reached. Wow!"),
 154                GNUTLS_E_RECORD_LIMIT_REACHED, 1),
 155   ERROR_ENTRY (N_("Error in the certificate."), GNUTLS_E_CERTIFICATE_ERROR,
 156                1),
 157   ERROR_ENTRY (N_("Unknown Subject Alternative name in X.509 certificate."),
 158                GNUTLS_E_X509_UNKNOWN_SAN, 1),
 159
 160   ERROR_ENTRY (N_("Unsupported critical extension in X.509 certificate."),
 161                GNUTLS_E_X509_UNSUPPORTED_CRITICAL_EXTENSION, 1),
 162   ERROR_ENTRY (N_("Unsupported extension in X.509 certificate."),
 163                GNUTLS_E_X509_UNSUPPORTED_EXTENSION, 1),
 164   ERROR_ENTRY (N_("Key usage violation in certificate has been detected."),
 165                GNUTLS_E_KEY_USAGE_VIOLATION, 1),
 166   ERROR_ENTRY (N_("Resource temporarily unavailable, try again."),
 167                GNUTLS_E_AGAIN, 0),
 168   ERROR_ENTRY (N_("The transmitted packet is too large (EMSGSIZE)."),
 169                GNUTLS_E_LARGE_PACKET, 0),
 170   ERROR_ENTRY (N_("Function was interrupted."), GNUTLS_E_INTERRUPTED, 0),
 171   ERROR_ENTRY (N_("Rehandshake was requested by the peer."),
 172                GNUTLS_E_REHANDSHAKE, 0),
 173   ERROR_ENTRY (N_
 174                ("TLS Application data were received, while expecting handshake data."),
 175                GNUTLS_E_GOT_APPLICATION_DATA, 1),
 176   ERROR_ENTRY (N_("Error in Database backend."), GNUTLS_E_DB_ERROR, 1),
 177   ERROR_ENTRY (N_("The certificate type is not supported."),
 178                GNUTLS_E_UNSUPPORTED_CERTIFICATE_TYPE, 1),
 179   ERROR_ENTRY (N_("The given memory buffer is too short to hold parameters."),
 180                GNUTLS_E_SHORT_MEMORY_BUFFER, 1),
 181   ERROR_ENTRY (N_("The request is invalid."), GNUTLS_E_INVALID_REQUEST, 1),
 182   ERROR_ENTRY (N_("The cookie was bad."), GNUTLS_E_BAD_COOKIE, 1),
 183   ERROR_ENTRY (N_("An illegal parameter has been received."),
 184                GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER, 1),
 185   ERROR_ENTRY (N_("An illegal parameter was found."),
 186                GNUTLS_E_ILLEGAL_PARAMETER, 1),
 187   ERROR_ENTRY (N_("Error while reading file."), GNUTLS_E_FILE_ERROR, 1),
 188
 189   ERROR_ENTRY (N_("ASN1 parser: Element was not found."),
 190                GNUTLS_E_ASN1_ELEMENT_NOT_FOUND, 1),
 191   ERROR_ENTRY (N_("ASN1 parser: Identifier was not found"),
 192                GNUTLS_E_ASN1_IDENTIFIER_NOT_FOUND, 1),
 193   ERROR_ENTRY (N_("ASN1 parser: Error in DER parsing."),
 194                GNUTLS_E_ASN1_DER_ERROR, 1),
 195   ERROR_ENTRY (N_("ASN1 parser: Value was not found."),
 196                GNUTLS_E_ASN1_VALUE_NOT_FOUND, 1),
 197   ERROR_ENTRY (N_("ASN1 parser: Generic parsing error."),
 198                GNUTLS_E_ASN1_GENERIC_ERROR, 1),
 199   ERROR_ENTRY (N_("ASN1 parser: Value is not valid."),
 200                GNUTLS_E_ASN1_VALUE_NOT_VALID, 1),
 201   ERROR_ENTRY (N_("ASN1 parser: Error in TAG."), GNUTLS_E_ASN1_TAG_ERROR, 1),
 202   ERROR_ENTRY (N_("ASN1 parser: error in implicit tag"),
 203                GNUTLS_E_ASN1_TAG_IMPLICIT, 1),
 204   ERROR_ENTRY (N_("ASN1 parser: Error in type 'ANY'."),
 205                GNUTLS_E_ASN1_TYPE_ANY_ERROR, 1),
 206   ERROR_ENTRY (N_("ASN1 parser: Syntax error."), GNUTLS_E_ASN1_SYNTAX_ERROR,
 207                1),
 208   ERROR_ENTRY (N_("ASN1 parser: Overflow in DER parsing."),
 209                GNUTLS_E_ASN1_DER_OVERFLOW, 1),
 210
 211   ERROR_ENTRY (N_("Too many empty record packets have been received."),
 212                GNUTLS_E_TOO_MANY_EMPTY_PACKETS, 1),
 213   ERROR_ENTRY (N_("Too many handshake packets have been received."),
 214                GNUTLS_E_TOO_MANY_HANDSHAKE_PACKETS, 1),
 215   ERROR_ENTRY (N_("The crypto library version is too old."),
 216                GNUTLS_E_INCOMPATIBLE_GCRYPT_LIBRARY, 1),
 217
 218   ERROR_ENTRY (N_("The tasn1 library version is too old."),
 219                GNUTLS_E_INCOMPATIBLE_LIBTASN1_LIBRARY, 1),
 220   ERROR_ENTRY (N_("The OpenPGP User ID is revoked."),
 221                GNUTLS_E_OPENPGP_UID_REVOKED, 1),
 222   ERROR_ENTRY (N_("The OpenPGP key has not a preferred key set."),
 223                GNUTLS_E_OPENPGP_PREFERRED_KEY_ERROR, 1),
 224   ERROR_ENTRY (N_("Error loading the keyring."),
 225                GNUTLS_E_OPENPGP_KEYRING_ERROR, 1),
 226   ERROR_ENTRY (N_("The initialization of crypto backend has failed."),
 227                GNUTLS_E_CRYPTO_INIT_FAILED, 1),
 228   ERROR_ENTRY (N_("No supported compression algorithms have been found."),
 229                GNUTLS_E_NO_COMPRESSION_ALGORITHMS, 1),
 230   ERROR_ENTRY (N_("No supported cipher suites have been found."),
 231                GNUTLS_E_NO_CIPHER_SUITES, 1),
 232   ERROR_ENTRY (N_("Could not get OpenPGP key."),
 233                GNUTLS_E_OPENPGP_GETKEY_FAILED, 1),
 234   ERROR_ENTRY (N_("Could not find OpenPGP subkey."),
 235                GNUTLS_E_OPENPGP_SUBKEY_ERROR, 1),
 236   ERROR_ENTRY (N_("Safe renegotiation failed."),
 237                GNUTLS_E_SAFE_RENEGOTIATION_FAILED, 1),
 238   ERROR_ENTRY (N_("Unsafe renegotiation denied."),
 239                GNUTLS_E_UNSAFE_RENEGOTIATION_DENIED, 1),
 240
 241   ERROR_ENTRY (N_("The SRP username supplied is illegal."),
 242                GNUTLS_E_ILLEGAL_SRP_USERNAME, 1),
 243   ERROR_ENTRY (N_("The SRP username supplied is unknown."),
 244                GNUTLS_E_UNKNOWN_SRP_USERNAME, 1),
 245
 246   ERROR_ENTRY (N_("The OpenPGP fingerprint is not supported."),
 247                GNUTLS_E_OPENPGP_FINGERPRINT_UNSUPPORTED, 1),
 248   ERROR_ENTRY (N_("The signature algorithm is not supported."),
 249                GNUTLS_E_UNSUPPORTED_SIGNATURE_ALGORITHM, 1),
 250   ERROR_ENTRY (N_("The certificate has unsupported attributes."),
 251                GNUTLS_E_X509_UNSUPPORTED_ATTRIBUTE, 1),
 252   ERROR_ENTRY (N_("The OID is not supported."), GNUTLS_E_X509_UNSUPPORTED_OID,
 253                1),
 254   ERROR_ENTRY (N_("The hash algorithm is unknown."),
 255                GNUTLS_E_UNKNOWN_HASH_ALGORITHM, 1),
 256   ERROR_ENTRY (N_("The PKCS structure's content type is unknown."),
 257                GNUTLS_E_UNKNOWN_PKCS_CONTENT_TYPE, 1),
 258   ERROR_ENTRY (N_("The PKCS structure's bag type is unknown."),
 259                GNUTLS_E_UNKNOWN_PKCS_BAG_TYPE, 1),
 260   ERROR_ENTRY (N_("The given password contains invalid characters."),
 261                GNUTLS_E_INVALID_PASSWORD, 1),
 262   ERROR_ENTRY (N_("The Message Authentication Code verification failed."),
 263                GNUTLS_E_MAC_VERIFY_FAILED, 1),
 264   ERROR_ENTRY (N_("Some constraint limits were reached."),
 265                GNUTLS_E_CONSTRAINT_ERROR, 1),
 266   ERROR_ENTRY (N_("Failed to acquire random data."), GNUTLS_E_RANDOM_FAILED,
 267                1),
 268
 269   ERROR_ENTRY (N_("Received a TLS/IA Intermediate Phase Finished message"),
 270                GNUTLS_E_WARNING_IA_IPHF_RECEIVED, 0),
 271   ERROR_ENTRY (N_("Received a TLS/IA Final Phase Finished message"),
 272                GNUTLS_E_WARNING_IA_FPHF_RECEIVED, 0),
 273   ERROR_ENTRY (N_("Verifying TLS/IA phase checksum failed"),
 274                GNUTLS_E_IA_VERIFY_FAILED, 1),
 275
 276   ERROR_ENTRY (N_("The specified algorithm or protocol is unknown."),
 277                GNUTLS_E_UNKNOWN_ALGORITHM, 1),
 278
 279   ERROR_ENTRY (N_("The handshake data size is too large."),
 280                GNUTLS_E_HANDSHAKE_TOO_LARGE, 1),
 281
 282   ERROR_ENTRY (N_("Error opening /dev/crypto"),
 283                GNUTLS_E_CRYPTODEV_DEVICE_ERROR, 1),
 284
 285   ERROR_ENTRY (N_("Error interfacing with /dev/crypto"),
 286                GNUTLS_E_CRYPTODEV_IOCTL_ERROR, 1),
 287   ERROR_ENTRY (N_("Peer has terminated the connection"),
 288                GNUTLS_E_SESSION_EOF, 1),
 289   ERROR_ENTRY (N_("Channel binding data not available"),
 290                GNUTLS_E_CHANNEL_BINDING_NOT_AVAILABLE, 1),
 291
 292   ERROR_ENTRY (N_("TPM error."),
 293                GNUTLS_E_TPM_ERROR, 1),
 294   ERROR_ENTRY (N_("TPM is not initialized."),
 295                GNUTLS_E_TPM_UNINITIALIZED, 1),
 296   ERROR_ENTRY (N_("TPM key was not found in persistent storage."),
 297                GNUTLS_E_TPM_KEY_NOT_FOUND, 1),
 298   ERROR_ENTRY (N_("Cannot initialize a session with the TPM."),
 299                GNUTLS_E_TPM_SESSION_ERROR, 1),
 300   ERROR_ENTRY (N_("PKCS #11 error."),
 301                GNUTLS_E_PKCS11_ERROR, 1),
 302   ERROR_ENTRY (N_("PKCS #11 initialization error."),
 303                GNUTLS_E_PKCS11_LOAD_ERROR, 1),
 304   ERROR_ENTRY (N_("Error in parsing."),
 305                GNUTLS_E_PARSING_ERROR, 1),
 306   ERROR_ENTRY (N_("Error in provided PIN."),
 307                GNUTLS_E_PKCS11_PIN_ERROR, 1),
 308   ERROR_ENTRY (N_("Error in provided SRK password for TPM."),
 309                GNUTLS_E_TPM_SRK_PASSWORD_ERROR, 1),
 310   ERROR_ENTRY (N_("Error in provided password for key to be loaded in TPM."),
 311                GNUTLS_E_TPM_KEY_PASSWORD_ERROR, 1),
 312   ERROR_ENTRY (N_("PKCS #11 error in slot"),
 313                GNUTLS_E_PKCS11_SLOT_ERROR, 1),
 314   ERROR_ENTRY (N_("Thread locking error"),
 315                GNUTLS_E_LOCKING_ERROR, 1),
 316   ERROR_ENTRY (N_("PKCS #11 error in attribute"),
 317                GNUTLS_E_PKCS11_ATTRIBUTE_ERROR, 1),
 318   ERROR_ENTRY (N_("PKCS #11 error in device"),
 319                GNUTLS_E_PKCS11_DEVICE_ERROR, 1),
 320   ERROR_ENTRY (N_("PKCS #11 error in data"),
 321                GNUTLS_E_PKCS11_DATA_ERROR, 1),
 322   ERROR_ENTRY (N_("PKCS #11 unsupported feature"),
 323                GNUTLS_E_PKCS11_UNSUPPORTED_FEATURE_ERROR, 1),
 324   ERROR_ENTRY (N_("PKCS #11 error in key"),
 325                GNUTLS_E_PKCS11_KEY_ERROR, 1),
 326   ERROR_ENTRY (N_("PKCS #11 PIN expired"),
 327                GNUTLS_E_PKCS11_PIN_EXPIRED, 1),
 328   ERROR_ENTRY (N_("PKCS #11 PIN locked"),
 329                GNUTLS_E_PKCS11_PIN_LOCKED, 1),
 330   ERROR_ENTRY (N_("PKCS #11 error in session"),
 331                GNUTLS_E_PKCS11_SESSION_ERROR, 1),
 332   ERROR_ENTRY (N_("PKCS #11 error in signature"),
 333                GNUTLS_E_PKCS11_SIGNATURE_ERROR, 1),
 334   ERROR_ENTRY (N_("PKCS #11 error in token"),
 335                GNUTLS_E_PKCS11_TOKEN_ERROR, 1),
 336   ERROR_ENTRY (N_("PKCS #11 user error"),
 337                GNUTLS_E_PKCS11_USER_ERROR, 1),
 338   ERROR_ENTRY (N_("The operation timed out"),
 339                GNUTLS_E_TIMEDOUT, 1),
 340   ERROR_ENTRY (N_("The operation was cancelled due to user error"),
 341                GNUTLS_E_USER_ERROR, 1),
 342   ERROR_ENTRY (N_("No supported ECC curves were found"),
 343                GNUTLS_E_ECC_NO_SUPPORTED_CURVES, 1),
 344   ERROR_ENTRY (N_("The curve is unsupported"),
 345                GNUTLS_E_ECC_UNSUPPORTED_CURVE, 1),
 346   ERROR_ENTRY (N_("The requested PKCS #11 object is not available"),
 347                GNUTLS_E_PKCS11_REQUESTED_OBJECT_NOT_AVAILBLE, 1),
 348   ERROR_ENTRY (N_("The provided X.509 certificate list is not sorted (in subject to issuer order)"),
 349                GNUTLS_E_CERTIFICATE_LIST_UNSORTED, 1),
 350   {NULL, NULL, 0, 0}
 351 };
 352
 353 /**
 354  * gnutls_error_is_fatal:
 355  * @error: is a GnuTLS error code, a negative error code
 356  *
 357  * If a GnuTLS function returns a negative error code you may feed that
 358  * value to this function to see if the error condition is fatal.
 359  * Note that you may also want to check the error code manually, since some
 360  * non-fatal errors to the protocol (such as a warning alert or
 361  * a rehandshake request) may be fatal for your program.
 362  *
 363  * This function is only useful if you are dealing with errors from
 364  * the record layer or the handshake layer.
 365  *
 366  * Returns: 1 if the error code is fatal, for positive @error values,
 367  *   0 is returned.  For unknown @error values, -1 is returned.
 368  **/
 369 int
 370 gnutls_error_is_fatal (int error)
 371 {
 372   int ret = 1;
 373   const gnutls_error_entry *p;
 374
 375   /* Input sanitzation.  Positive values are not errors at all, and
 376      definitely not fatal. */
 377   if (error > 0)
 378     return 0;
 379
 380   for (p = error_algorithms; p->desc != NULL; p++)
 381     {
 382       if (p->number == error)
 383         {
 384           ret = p->fatal;
 385           break;
 386         }
 387     }
 388
 389   return ret;
 390 }
 391
 392 /**
 393  * gnutls_perror:
 394  * @error: is a GnuTLS error code, a negative error code
 395  *
 396  * This function is like perror(). The only difference is that it
 397  * accepts an error number returned by a gnutls function.
 398  **/
 399 void
 400 gnutls_perror (int error)
 401 {
 402   fprintf (stderr, "GnuTLS error: %s\n", gnutls_strerror (error));
 403 }
 404
 405
 406 /**
 407  * gnutls_strerror:
 408  * @error: is a GnuTLS error code, a negative error code
 409  *
 410  * This function is similar to strerror.  The difference is that it
 411  * accepts an error number returned by a gnutls function; In case of
 412  * an unknown error a descriptive string is sent instead of %NULL.
 413  *
 414  * Error codes are always a negative error code.
 415  *
 416  * Returns: A string explaining the GnuTLS error message.
 417  **/
 418 const char *
 419 gnutls_strerror (int error)
 420 {
 421   const char *ret = NULL;
 422   const gnutls_error_entry *p;
 423
 424   for (p = error_algorithms; p->desc != NULL; p++)
 425     {
 426       if (p->number == error)
 427         {
 428           ret = p->desc;
 429           break;
 430         }
 431     }
 432
 433   /* avoid prefix */
 434   if (ret == NULL)
 435     return _("(unknown error code)");
 436
 437   return _(ret);
 438 }
 439
 440 /**
 441  * gnutls_strerror_name:
 442  * @error: is an error returned by a gnutls function.
 443  *
 444  * Return the GnuTLS error code define as a string.  For example,
 445  * gnutls_strerror_name (GNUTLS_E_DH_PRIME_UNACCEPTABLE) will return
 446  * the string "GNUTLS_E_DH_PRIME_UNACCEPTABLE".
 447  *
 448  * Returns: A string corresponding to the symbol name of the error
 449  * code.
 450  *
 451  * Since: 2.6.0
 452  **/
 453 const char *
 454 gnutls_strerror_name (int error)
 455 {
 456   const char *ret = NULL;
 457   const gnutls_error_entry *p;
 458
 459   for (p = error_algorithms; p->desc != NULL; p++)
 460     {
 461       if (p->number == error)
 462         {
 463           ret = p->_name;
 464           break;
 465         }
 466     }
 467
 468   return ret;
 469 }
 470
 471 int
 472 _gnutls_asn2err (int asn_err)
 473 {
 474   switch (asn_err)
 475     {
 476     case ASN1_FILE_NOT_FOUND:
 477       return GNUTLS_E_FILE_ERROR;
 478     case ASN1_ELEMENT_NOT_FOUND:
 479       return GNUTLS_E_ASN1_ELEMENT_NOT_FOUND;
 480     case ASN1_IDENTIFIER_NOT_FOUND:
 481       return GNUTLS_E_ASN1_IDENTIFIER_NOT_FOUND;
 482     case ASN1_DER_ERROR:
 483       return GNUTLS_E_ASN1_DER_ERROR;
 484     case ASN1_VALUE_NOT_FOUND:
 485       return GNUTLS_E_ASN1_VALUE_NOT_FOUND;
 486     case ASN1_GENERIC_ERROR:
 487       return GNUTLS_E_ASN1_GENERIC_ERROR;
 488     case ASN1_VALUE_NOT_VALID:
 489       return GNUTLS_E_ASN1_VALUE_NOT_VALID;
 490     case ASN1_TAG_ERROR:
 491       return GNUTLS_E_ASN1_TAG_ERROR;
 492     case ASN1_TAG_IMPLICIT:
 493       return GNUTLS_E_ASN1_TAG_IMPLICIT;
 494     case ASN1_ERROR_TYPE_ANY:
 495       return GNUTLS_E_ASN1_TYPE_ANY_ERROR;
 496     case ASN1_SYNTAX_ERROR:
 497       return GNUTLS_E_ASN1_SYNTAX_ERROR;
 498     case ASN1_MEM_ERROR:
 499       return GNUTLS_E_SHORT_MEMORY_BUFFER;
 500     case ASN1_MEM_ALLOC_ERROR:
 501       return GNUTLS_E_MEMORY_ERROR;
 502     case ASN1_DER_OVERFLOW:
 503       return GNUTLS_E_ASN1_DER_OVERFLOW;
 504     default:
 505       return GNUTLS_E_ASN1_GENERIC_ERROR;
 506     }
 507 }
 508
 509 void
 510 _gnutls_mpi_log (const char *prefix, bigint_t a)
 511 {
 512   size_t binlen = 0;
 513   void *binbuf;
 514   size_t hexlen;
 515   char *hexbuf;
 516   int res;
 517
 518   if (_gnutls_log_level < 2) return;
 519
 520   res = _gnutls_mpi_print (a, NULL, &binlen);
 521   if (res < 0 && res != GNUTLS_E_SHORT_MEMORY_BUFFER)
 522     {
 523       gnutls_assert ();
 524       _gnutls_hard_log ("MPI: %s can't print value (%d/%d)\n", prefix, res,
 525                         (int) binlen);
 526       return;
 527     }
 528
 529   if (binlen > 1024 * 1024)
 530     {
 531       gnutls_assert ();
 532       _gnutls_hard_log ("MPI: %s too large mpi (%d)\n", prefix, (int) binlen);
 533       return;
 534     }
 535
 536   binbuf = gnutls_malloc (binlen);
 537   if (!binbuf)
 538     {
 539       gnutls_assert ();
 540       _gnutls_hard_log ("MPI: %s out of memory (%d)\n", prefix, (int) binlen);
 541       return;
 542     }
 543
 544   res = _gnutls_mpi_print (a, binbuf, &binlen);
 545   if (res != 0)
 546     {
 547       gnutls_assert ();
 548       _gnutls_hard_log ("MPI: %s can't print value (%d/%d)\n", prefix, res,
 549                         (int) binlen);
 550       gnutls_free (binbuf);
 551       return;
 552     }
 553
 554   hexlen = 2 * binlen + 1;
 555   hexbuf = gnutls_malloc (hexlen);
 556
 557   if (!hexbuf)
 558     {
 559       gnutls_assert ();
 560       _gnutls_hard_log ("MPI: %s out of memory (hex %d)\n", prefix, (int) hexlen);
 561       gnutls_free (binbuf);
 562       return;
 563     }
 564
 565   _gnutls_bin2hex (binbuf, binlen, hexbuf, hexlen, NULL);
 566
 567   _gnutls_hard_log ("MPI: length: %d\n\t%s%s\n", (int) binlen, prefix,
 568                     hexbuf);
 569
 570   gnutls_free (hexbuf);
 571   gnutls_free (binbuf);
 572 }
 573
 574 /* this function will output a message using the
 575  * caller provided function
 576  */
 577 void
 578 _gnutls_log (int level, const char *fmt, ...)
 579 {
 580   va_list args;
 581   char *str;
 582   int ret;
 583
 584   if (_gnutls_log_func == NULL)
 585     return;
 586
 587   va_start (args, fmt);
 588   ret = vasprintf (&str, fmt, args);
 589   va_end (args);
 590
 591   if (ret >= 0)
 592     {
 593       _gnutls_log_func (level, str);
 594       free (str);
 595     }
 596 }
 597
 598 void
 599 _gnutls_audit_log (gnutls_session_t session, const char *fmt, ...)
 600 {
 601   va_list args;
 602   char *str;
 603   int ret;
 604
 605   if (_gnutls_audit_log_func == NULL && _gnutls_log_func == NULL)
 606     return;
 607
 608   va_start (args, fmt);
 609   ret = vasprintf (&str, fmt, args);
 610   va_end (args);
 611
 612   if (ret >= 0)
 613     {
 614       if (_gnutls_audit_log_func)
 615         _gnutls_audit_log_func (session, str);
 616       else
 617         _gnutls_log_func(1, str);
 618       free (str);
 619     }
 620 }
 621
 622 #ifndef DEBUG
 623 #ifndef C99_MACROS
 624
 625 /* Without C99 macros these functions have to
 626  * be called. This may affect performance.
 627  */
 628 void
 629 _gnutls_null_log (void *x, ...)
 630 {
 631   return;
 632 }
 633
 634 #endif /* C99_MACROS */
 635 #endif /* DEBUG */