1/*
2 *  Translate error code to error string
3 *
4 *  Copyright The Mbed TLS Contributors
5 *  SPDX-License-Identifier: Apache-2.0
6 *
7 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
8 *  not use this file except in compliance with the License.
9 *  You may obtain a copy of the License at
10 *
11 *  http://www.apache.org/licenses/LICENSE-2.0
12 *
13 *  Unless required by applicable law or agreed to in writing, software
14 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 *  See the License for the specific language governing permissions and
17 *  limitations under the License.
18 */
19
20#include "mbedtls/build_info.h"
21
22#include "mbedtls/platform.h"
23
24#if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
25#include "mbedtls/error.h"
26
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#endif
31
32#define USAGE \
33    "\n usage: strerror <errorcode>\n" \
34    "\n where <errorcode> can be a decimal or hexadecimal (starts with 0x or -0x)\n"
35
36#if !defined(MBEDTLS_ERROR_C) && !defined(MBEDTLS_ERROR_STRERROR_DUMMY)
37int main(void)
38{
39    mbedtls_printf("MBEDTLS_ERROR_C and/or MBEDTLS_ERROR_STRERROR_DUMMY not defined.\n");
40    mbedtls_exit(0);
41}
42#else
43int main(int argc, char *argv[])
44{
45    long int val;
46    char *end = argv[1];
47
48    if (argc != 2) {
49        mbedtls_printf(USAGE);
50        mbedtls_exit(0);
51    }
52
53    val = strtol(argv[1], &end, 10);
54    if (*end != '\0') {
55        val = strtol(argv[1], &end, 16);
56        if (*end != '\0') {
57            mbedtls_printf(USAGE);
58            return 0;
59        }
60    }
61    if (val > 0) {
62        val = -val;
63    }
64
65    if (val != 0) {
66        char error_buf[200];
67        mbedtls_strerror(val, error_buf, 200);
68        mbedtls_printf("Last error was: -0x%04x - %s\n\n", (unsigned int) -val, error_buf);
69    }
70
71    mbedtls_exit(val);
72}
73#endif /* MBEDTLS_ERROR_C */
74