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/*
* Copyright (C) 2000 Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* GNUTLS is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNUTLS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "gnutls_errors.h"
extern void (*_gnutls_log_func)( const char*);
#define GNUTLS_ERROR_ENTRY(name, fatal) \
{ #name, name, fatal }
struct gnutls_error_entry {
char *name;
int number;
int fatal;
};
typedef struct gnutls_error_entry gnutls_error_entry;
static gnutls_error_entry error_algorithms[] = {
GNUTLS_ERROR_ENTRY( GNUTLS_E_SUCCESS, 0),
GNUTLS_ERROR_ENTRY( GNUTLS_E_MAC_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNKNOWN_CIPHER, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNKNOWN_CIPHER_SUITE, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNKNOWN_COMPRESSION_ALGORITHM, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNKNOWN_MAC_ALGORITHM, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNKNOWN_ERROR, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNKNOWN_CIPHER_TYPE, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNWANTED_ALGORITHM, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_LARGE_PACKET, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNSUPPORTED_VERSION_PACKET, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNEXPECTED_PACKET_LENGTH, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_INVALID_SESSION, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNABLE_SEND_DATA, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_FATAL_ALERT_RECEIVED ,1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_RECEIVED_BAD_MESSAGE, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_RECEIVED_MORE_DATA, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNEXPECTED_PACKET, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_WARNING_ALERT_RECEIVED, 0),
GNUTLS_ERROR_ENTRY( GNUTLS_E_ERROR_IN_FINISHED_PACKET, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNEXPECTED_HANDSHAKE_PACKET, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNKNOWN_KX_ALGORITHM, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_MPI_SCAN_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_MPI_PRINT_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_DECRYPTION_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_ENCRYPTION_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_PK_DECRYPTION_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_PK_ENCRYPTION_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_PK_SIGNATURE_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_DECOMPRESSION_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_COMPRESSION_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_MEMORY_ERROR, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_UNIMPLEMENTED_FEATURE, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_INSUFICIENT_CRED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_PWD_ERROR, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_PKCS1_WRONG_PAD, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_EXPIRED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_HASH_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_PARSING_ERROR, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_AUTH_FAILED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_RECORD_LIMIT_REACHED, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_ASN1_PARSING_ERROR, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_ASN1_ERROR, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_X509_CERTIFICATE_ERROR, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_X509_UNSUPPORTED_CRITICAL_EXTENSION, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_X509_KEY_USAGE_VIOLATION, 1),
GNUTLS_ERROR_ENTRY( GNUTLS_E_AGAIN, 0),
GNUTLS_ERROR_ENTRY( GNUTLS_E_GOT_HELLO_REQUEST, 0),
GNUTLS_ERROR_ENTRY( GNUTLS_E_GOT_APPLICATION_DATA, 0),
GNUTLS_ERROR_ENTRY( GNUTLS_E_DB_ERROR, 1),
{0}
};
#define GNUTLS_ERROR_LOOP(b) \
gnutls_error_entry *p; \
for(p = error_algorithms; p->name != NULL; p++) { b ; }
#define GNUTLS_ERROR_ALG_LOOP(a) \
GNUTLS_ERROR_LOOP( if(p->number == error) { a; break; } )
/**
* gnutls_is_fatal_error - Returns non-zero in case of a fatal error
* @error: is an error returned by a gnutls function. Error is always a negative value.
*
* If a function returns a negative value you may feed that value
* to this function to see if it is fatal. Returns 1 for a fatal
* error 0 otherwise. However you may want to check the
* error code manualy, since some non-fatal errors to the protocol
* may be fatal for you (your program).
**/
int gnutls_is_fatal_error(int error)
{
int ret = 0;
GNUTLS_ERROR_ALG_LOOP(ret = p->fatal);
return ret;
}
/**
* gnutls_perror - prints a string to stderr with a description of an error
* @error: is an error returned by a gnutls function. Error is always a negative value.
*
* This function is like perror(). However it accepts an error returned by a gnutls
* function.
**/
void gnutls_perror(int error)
{
char *ret = NULL;
/* avoid prefix */
GNUTLS_ERROR_ALG_LOOP(ret =
gnutls_strdup(p->name + sizeof("GNUTLS_E_") - 1));
_gnutls_log( "GNUTLS ERROR: %s\n", ret);
gnutls_free( ret);
}
/**
* gnutls_strerror - Returns a string with a description of an error
* @error: is an error returned by a gnutls function. Error is always a negative value.
*
* This function is like strerror(). However it accepts an error returned by a gnutls
* function.
**/
const char* gnutls_strerror(int error)
{
char *ret = NULL;
/* avoid prefix */
GNUTLS_ERROR_ALG_LOOP(ret =
p->name + sizeof("GNUTLS_E_") - 1);
return ret;
}
/* this function will output a message using the
* caller provided function
*/
void _gnutls_log( const char *fmt, ...) {
va_list args;
char str[MAX_LOG_SIZE];
void (*log_func)() = _gnutls_log_func;
va_start(args,fmt);
vsprintf( str,fmt,args);
va_end(args);
log_func( str);
return;
}
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