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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_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
#include "mbedtls/error.h"
#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
// Error code table type
struct ssl_errs {
int16_t errnum;
const char *errstr;
};
// Table of high level error codes
static const struct ssl_errs mbedtls_high_level_error_tab[] = {
// BEGIN generated code
HIGH_LEVEL_CODE_CHECKS
// END generated code
};
static const struct ssl_errs mbedtls_low_level_error_tab[] = {
// Low level error codes
//
// BEGIN generated code
LOW_LEVEL_CODE_CHECKS
// END generated code
};
static const char *mbedtls_err_prefix = "MBEDTLS_ERR_";
#define MBEDTLS_ERR_PREFIX_LEN ( sizeof("MBEDTLS_ERR_")-1 )
// copy error text into buffer, ensure null termination, return strlen of result
static size_t mbedtls_err_to_str(int err, const struct ssl_errs tab[], int tab_len, char *buf, size_t buflen) {
if (buflen == 0) return 0;
// prefix for all error names
strncpy(buf, mbedtls_err_prefix, buflen);
if (buflen <= MBEDTLS_ERR_PREFIX_LEN+1) {
buf[buflen-1] = 0;
return buflen-1;
}
// append error name from table
for (int i = 0; i < tab_len; i++) {
if (tab[i].errnum == err) {
strncpy(buf+MBEDTLS_ERR_PREFIX_LEN, tab[i].errstr, buflen-MBEDTLS_ERR_PREFIX_LEN);
buf[buflen-1] = 0;
return strlen(buf);
}
}
mbedtls_snprintf(buf+MBEDTLS_ERR_PREFIX_LEN, buflen-MBEDTLS_ERR_PREFIX_LEN, "UNKNOWN (0x%04X)",
err);
return strlen(buf);
}
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
void mbedtls_strerror(int ret, char *buf, size_t buflen) {
int use_ret;
if (buflen == 0) return;
buf[buflen-1] = 0;
if (ret < 0) ret = -ret;
//
// High-level error codes
//
uint8_t got_hl = (ret & 0xFF80) != 0;
if (got_hl) {
use_ret = ret & 0xFF80;
// special case, don't try to translate low level code
#if defined(MBEDTLS_SSL_TLS_C)
if (use_ret == -(MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE)) {
strncpy(buf, "MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE", buflen);
buf[buflen-1] = 0;
return;
}
#endif
size_t len = mbedtls_err_to_str(use_ret, mbedtls_high_level_error_tab,
ARRAY_SIZE(mbedtls_high_level_error_tab), buf, buflen);
buf += len;
buflen -= len;
if (buflen == 0) return;
}
//
// Low-level error codes
//
use_ret = ret & ~0xFF80;
if (use_ret == 0) return;
// If high level code is present, make a concatenation between both error strings.
if (got_hl) {
if (buflen < 2) return;
*buf++ = '+';
buflen--;
}
mbedtls_err_to_str(use_ret, mbedtls_low_level_error_tab,
ARRAY_SIZE(mbedtls_low_level_error_tab), buf, buflen);
}
#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 */
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