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/*
* Error message information
*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#include "common.h"
#include "mbedtls/error.h"
#if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
#if defined(MBEDTLS_ERROR_C)
#include "mbedtls/platform.h"
#include <stdio.h>
#include <string.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 */
/*
* Provide a dummy implementation when 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_C */
#endif /* MBEDTLS_ERROR_C || MBEDTLS_ERROR_STRERROR_DUMMY */
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