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1/*
2 *  Error message information
3 *
4 *  Copyright The Mbed TLS Contributors
5 *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
6 *
7 *  This file is provided under the Apache License 2.0, or the
8 *  GNU General Public License v2.0 or later.
9 *
10 *  **********
11 *  Apache License 2.0:
12 *
13 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
14 *  not use this file except in compliance with the License.
15 *  You may obtain a copy of the License at
16 *
17 *  http://www.apache.org/licenses/LICENSE-2.0
18 *
19 *  Unless required by applicable law or agreed to in writing, software
20 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
21 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 *  See the License for the specific language governing permissions and
23 *  limitations under the License.
24 *
25 *  **********
26 *
27 *  **********
28 *  GNU General Public License v2.0 or later:
29 *
30 *  This program is free software; you can redistribute it and/or modify
31 *  it under the terms of the GNU General Public License as published by
32 *  the Free Software Foundation; either version 2 of the License, or
33 *  (at your option) any later version.
34 *
35 *  This program is distributed in the hope that it will be useful,
36 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
37 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
38 *  GNU General Public License for more details.
39 *
40 *  You should have received a copy of the GNU General Public License along
41 *  with this program; if not, write to the Free Software Foundation, Inc.,
42 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
43 *
44 *  **********
45 */
46
47#if !defined(MBEDTLS_CONFIG_FILE)
48#include "mbedtls/config.h"
49#else
50#include MBEDTLS_CONFIG_FILE
51#endif
52
53#if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
54
55#include "mbedtls/error.h"
56
57#if defined(MBEDTLS_ERROR_C)
58
59#if defined(MBEDTLS_PLATFORM_C)
60#include "mbedtls/platform.h"
61#else
62#define mbedtls_snprintf snprintf
63#endif
64
65#include <stdio.h>
66#include <string.h>
67
68HEADER_INCLUDED
69
70void mbedtls_strerror( int ret, char *buf, size_t buflen )
71{
72    size_t len;
73    int use_ret;
74
75    if( buflen == 0 )
76        return;
77
78    memset( buf, 0x00, buflen );
79
80    if( ret < 0 )
81        ret = -ret;
82
83    if( ret & 0xFF80 )
84    {
85        use_ret = ret & 0xFF80;
86
87        // High level error codes
88        //
89        // BEGIN generated code
90HIGH_LEVEL_CODE_CHECKS
91        // END generated code
92
93        if( strlen( buf ) == 0 )
94            mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
95    }
96
97    use_ret = ret & ~0xFF80;
98
99    if( use_ret == 0 )
100        return;
101
102    // If high level code is present, make a concatenation between both
103    // error strings.
104    //
105    len = strlen( buf );
106
107    if( len > 0 )
108    {
109        if( buflen - len < 5 )
110            return;
111
112        mbedtls_snprintf( buf + len, buflen - len, " : " );
113
114        buf += len + 3;
115        buflen -= len + 3;
116    }
117
118    // Low level error codes
119    //
120    // BEGIN generated code
121LOW_LEVEL_CODE_CHECKS
122    // END generated code
123
124    if( strlen( buf ) != 0 )
125        return;
126
127    mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", use_ret );
128}
129
130#else /* MBEDTLS_ERROR_C */
131
132/*
133 * Provide an non-function in case MBEDTLS_ERROR_C is not defined
134 */
135void mbedtls_strerror( int ret, char *buf, size_t buflen )
136{
137    ((void) ret);
138
139    if( buflen > 0 )
140        buf[0] = '\0';
141}
142
143#endif /* MBEDTLS_ERROR_C */
144
145#endif /* MBEDTLS_ERROR_C || MBEDTLS_ERROR_STRERROR_DUMMY */
146