mbedtls/scripts/data_files/error.fmt
Gilles Peskine 9515d76171
Merge pull request #3219 from aggarg/err_optimization
Remove error_description variable from strerr functions
2020-05-04 09:37:13 +02:00

174 lines
4.1 KiB
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/*
* Error message information
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file is part of mbed TLS (https://tls.mbed.org)
*/
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#if defined(MBEDTLS_ERROR_STRERROR_DUMMY)
#include <string.h>
#endif
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#define mbedtls_snprintf snprintf
#define mbedtls_time_t time_t
#endif
#if defined(MBEDTLS_ERROR_C)
#include <stdio.h>
HEADER_INCLUDED
const char * mbedtls_high_level_strerr( int error_code )
{
int high_level_error_code;
if( error_code < 0 )
error_code = -error_code;
/* Extract the high-level part from the error code. */
high_level_error_code = error_code & 0xFF80;
switch( high_level_error_code )
{
/* Begin Auto-Generated Code. */
HIGH_LEVEL_CODE_CHECKS
/* End Auto-Generated Code. */
default:
break;
}
return( NULL );
}
const char * mbedtls_low_level_strerr( int error_code )
{
int low_level_error_code;
if( error_code < 0 )
error_code = -error_code;
/* Extract the low-level part from the error code. */
low_level_error_code = error_code & ~0xFF80;
switch( low_level_error_code )
{
/* Begin Auto-Generated Code. */
LOW_LEVEL_CODE_CHECKS
/* End Auto-Generated Code. */
default:
break;
}
return( NULL );
}
void mbedtls_strerror( int ret, char *buf, size_t buflen )
{
size_t len;
int use_ret;
const char * high_level_error_description = NULL;
const char * low_level_error_description = NULL;
if( buflen == 0 )
return;
memset( buf, 0x00, buflen );
if( ret < 0 )
ret = -ret;
if( ret & 0xFF80 )
{
use_ret = ret & 0xFF80;
// Translate high level error code.
high_level_error_description = mbedtls_high_level_strerr( ret );
if( high_level_error_description == NULL )
mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", (unsigned int) use_ret );
else
mbedtls_snprintf( buf, buflen, "%s", high_level_error_description );
#if defined(MBEDTLS_SSL_TLS_C)
// Early return in case of a fatal error - do not try to translate low
// level code.
if(use_ret == -(MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE))
return;
#endif /* MBEDTLS_SSL_TLS_C */
}
use_ret = ret & ~0xFF80;
if( use_ret == 0 )
return;
// If high level code is present, make a concatenation between both
// error strings.
//
len = strlen( buf );
if( len > 0 )
{
if( buflen - len < 5 )
return;
mbedtls_snprintf( buf + len, buflen - len, " : " );
buf += len + 3;
buflen -= len + 3;
}
// Translate low level error code.
low_level_error_description = mbedtls_low_level_strerr( ret );
if( low_level_error_description == NULL )
mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", (unsigned int) use_ret );
else
mbedtls_snprintf( buf, buflen, "%s", low_level_error_description );
}
#else /* MBEDTLS_ERROR_C */
#if defined(MBEDTLS_ERROR_STRERROR_DUMMY)
/*
* Provide an non-function in case MBEDTLS_ERROR_C is not defined
*/
void mbedtls_strerror( int ret, char *buf, size_t buflen )
{
((void) ret);
if( buflen > 0 )
buf[0] = '\0';
}
#endif /* MBEDTLS_ERROR_STRERROR_DUMMY */
#endif /* MBEDTLS_ERROR_C */