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gcc10 compiler fixes:
[proxmark3-svn] / common / mbedtls / platform.c
1 /*
2 * Platform abstraction layer
3 *
4 * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: GPL-2.0
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * This file is part of mbed TLS (https://tls.mbed.org)
22 */
23
24 #if !defined(MBEDTLS_CONFIG_FILE)
25 #include "mbedtls/config.h"
26 #else
27 #include MBEDTLS_CONFIG_FILE
28 #endif
29
30 #if defined(MBEDTLS_PLATFORM_C)
31
32 #include "mbedtls/platform.h"
33 #include "mbedtls/platform_util.h"
34
35 #if defined(MBEDTLS_PLATFORM_MEMORY)
36 #if !defined(MBEDTLS_PLATFORM_STD_CALLOC)
37 static void *platform_calloc_uninit( size_t n, size_t size )
38 {
39 ((void) n);
40 ((void) size);
41 return( NULL );
42 }
43
44 #define MBEDTLS_PLATFORM_STD_CALLOC platform_calloc_uninit
45 #endif /* !MBEDTLS_PLATFORM_STD_CALLOC */
46
47 #if !defined(MBEDTLS_PLATFORM_STD_FREE)
48 static void platform_free_uninit( void *ptr )
49 {
50 ((void) ptr);
51 }
52
53 #define MBEDTLS_PLATFORM_STD_FREE platform_free_uninit
54 #endif /* !MBEDTLS_PLATFORM_STD_FREE */
55
56 static void * (*mbedtls_calloc_func)( size_t, size_t ) = MBEDTLS_PLATFORM_STD_CALLOC;
57 static void (*mbedtls_free_func)( void * ) = MBEDTLS_PLATFORM_STD_FREE;
58
59 void * mbedtls_calloc( size_t nmemb, size_t size )
60 {
61 return (*mbedtls_calloc_func)( nmemb, size );
62 }
63
64 void mbedtls_free( void * ptr )
65 {
66 (*mbedtls_free_func)( ptr );
67 }
68
69 int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ),
70 void (*free_func)( void * ) )
71 {
72 mbedtls_calloc_func = calloc_func;
73 mbedtls_free_func = free_func;
74 return( 0 );
75 }
76 #endif /* MBEDTLS_PLATFORM_MEMORY */
77
78 #if defined(_WIN32)
79 #include <stdarg.h>
80 int mbedtls_platform_win32_snprintf( char *s, size_t n, const char *fmt, ... )
81 {
82 int ret;
83 va_list argp;
84
85 /* Avoid calling the invalid parameter handler by checking ourselves */
86 if( s == NULL || n == 0 || fmt == NULL )
87 return( -1 );
88
89 va_start( argp, fmt );
90 #if defined(_TRUNCATE) && !defined(__MINGW32__)
91 ret = _vsnprintf_s( s, n, _TRUNCATE, fmt, argp );
92 #else
93 ret = _vsnprintf( s, n, fmt, argp );
94 if( ret < 0 || (size_t) ret == n )
95 {
96 s[n-1] = '\0';
97 ret = -1;
98 }
99 #endif
100 va_end( argp );
101
102 return( ret );
103 }
104 #endif
105
106 #if defined(MBEDTLS_PLATFORM_SNPRINTF_ALT)
107 #if !defined(MBEDTLS_PLATFORM_STD_SNPRINTF)
108 /*
109 * Make dummy function to prevent NULL pointer dereferences
110 */
111 static int platform_snprintf_uninit( char * s, size_t n,
112 const char * format, ... )
113 {
114 ((void) s);
115 ((void) n);
116 ((void) format);
117 return( 0 );
118 }
119
120 #define MBEDTLS_PLATFORM_STD_SNPRINTF platform_snprintf_uninit
121 #endif /* !MBEDTLS_PLATFORM_STD_SNPRINTF */
122
123 int (*mbedtls_snprintf)( char * s, size_t n,
124 const char * format,
125 ... ) = MBEDTLS_PLATFORM_STD_SNPRINTF;
126
127 int mbedtls_platform_set_snprintf( int (*snprintf_func)( char * s, size_t n,
128 const char * format,
129 ... ) )
130 {
131 mbedtls_snprintf = snprintf_func;
132 return( 0 );
133 }
134 #endif /* MBEDTLS_PLATFORM_SNPRINTF_ALT */
135
136 #if defined(MBEDTLS_PLATFORM_PRINTF_ALT)
137 #if !defined(MBEDTLS_PLATFORM_STD_PRINTF)
138 /*
139 * Make dummy function to prevent NULL pointer dereferences
140 */
141 static int platform_printf_uninit( const char *format, ... )
142 {
143 ((void) format);
144 return( 0 );
145 }
146
147 #define MBEDTLS_PLATFORM_STD_PRINTF platform_printf_uninit
148 #endif /* !MBEDTLS_PLATFORM_STD_PRINTF */
149
150 int (*mbedtls_printf)( const char *, ... ) = MBEDTLS_PLATFORM_STD_PRINTF;
151
152 int mbedtls_platform_set_printf( int (*printf_func)( const char *, ... ) )
153 {
154 mbedtls_printf = printf_func;
155 return( 0 );
156 }
157 #endif /* MBEDTLS_PLATFORM_PRINTF_ALT */
158
159 #if defined(MBEDTLS_PLATFORM_FPRINTF_ALT)
160 #if !defined(MBEDTLS_PLATFORM_STD_FPRINTF)
161 /*
162 * Make dummy function to prevent NULL pointer dereferences
163 */
164 static int platform_fprintf_uninit( FILE *stream, const char *format, ... )
165 {
166 ((void) stream);
167 ((void) format);
168 return( 0 );
169 }
170
171 #define MBEDTLS_PLATFORM_STD_FPRINTF platform_fprintf_uninit
172 #endif /* !MBEDTLS_PLATFORM_STD_FPRINTF */
173
174 int (*mbedtls_fprintf)( FILE *, const char *, ... ) =
175 MBEDTLS_PLATFORM_STD_FPRINTF;
176
177 int mbedtls_platform_set_fprintf( int (*fprintf_func)( FILE *, const char *, ... ) )
178 {
179 mbedtls_fprintf = fprintf_func;
180 return( 0 );
181 }
182 #endif /* MBEDTLS_PLATFORM_FPRINTF_ALT */
183
184 #if defined(MBEDTLS_PLATFORM_EXIT_ALT)
185 #if !defined(MBEDTLS_PLATFORM_STD_EXIT)
186 /*
187 * Make dummy function to prevent NULL pointer dereferences
188 */
189 static void platform_exit_uninit( int status )
190 {
191 ((void) status);
192 }
193
194 #define MBEDTLS_PLATFORM_STD_EXIT platform_exit_uninit
195 #endif /* !MBEDTLS_PLATFORM_STD_EXIT */
196
197 void (*mbedtls_exit)( int status ) = MBEDTLS_PLATFORM_STD_EXIT;
198
199 int mbedtls_platform_set_exit( void (*exit_func)( int status ) )
200 {
201 mbedtls_exit = exit_func;
202 return( 0 );
203 }
204 #endif /* MBEDTLS_PLATFORM_EXIT_ALT */
205
206 #if defined(MBEDTLS_HAVE_TIME)
207
208 #if defined(MBEDTLS_PLATFORM_TIME_ALT)
209 #if !defined(MBEDTLS_PLATFORM_STD_TIME)
210 /*
211 * Make dummy function to prevent NULL pointer dereferences
212 */
213 static mbedtls_time_t platform_time_uninit( mbedtls_time_t* timer )
214 {
215 ((void) timer);
216 return( 0 );
217 }
218
219 #define MBEDTLS_PLATFORM_STD_TIME platform_time_uninit
220 #endif /* !MBEDTLS_PLATFORM_STD_TIME */
221
222 mbedtls_time_t (*mbedtls_time)( mbedtls_time_t* timer ) = MBEDTLS_PLATFORM_STD_TIME;
223
224 int mbedtls_platform_set_time( mbedtls_time_t (*time_func)( mbedtls_time_t* timer ) )
225 {
226 mbedtls_time = time_func;
227 return( 0 );
228 }
229 #endif /* MBEDTLS_PLATFORM_TIME_ALT */
230
231 #endif /* MBEDTLS_HAVE_TIME */
232
233 #if defined(MBEDTLS_ENTROPY_NV_SEED)
234 #if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS) && defined(MBEDTLS_FS_IO)
235 /* Default implementations for the platform independent seed functions use
236 * standard libc file functions to read from and write to a pre-defined filename
237 */
238 int mbedtls_platform_std_nv_seed_read( unsigned char *buf, size_t buf_len )
239 {
240 FILE *file;
241 size_t n;
242
243 if( ( file = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "rb" ) ) == NULL )
244 return( -1 );
245
246 if( ( n = fread( buf, 1, buf_len, file ) ) != buf_len )
247 {
248 fclose( file );
249 mbedtls_platform_zeroize( buf, buf_len );
250 return( -1 );
251 }
252
253 fclose( file );
254 return( (int)n );
255 }
256
257 int mbedtls_platform_std_nv_seed_write( unsigned char *buf, size_t buf_len )
258 {
259 FILE *file;
260 size_t n;
261
262 if( ( file = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "w" ) ) == NULL )
263 return -1;
264
265 if( ( n = fwrite( buf, 1, buf_len, file ) ) != buf_len )
266 {
267 fclose( file );
268 return -1;
269 }
270
271 fclose( file );
272 return( (int)n );
273 }
274 #endif /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */
275
276 #if defined(MBEDTLS_PLATFORM_NV_SEED_ALT)
277 #if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ)
278 /*
279 * Make dummy function to prevent NULL pointer dereferences
280 */
281 static int platform_nv_seed_read_uninit( unsigned char *buf, size_t buf_len )
282 {
283 ((void) buf);
284 ((void) buf_len);
285 return( -1 );
286 }
287
288 #define MBEDTLS_PLATFORM_STD_NV_SEED_READ platform_nv_seed_read_uninit
289 #endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_READ */
290
291 #if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE)
292 /*
293 * Make dummy function to prevent NULL pointer dereferences
294 */
295 static int platform_nv_seed_write_uninit( unsigned char *buf, size_t buf_len )
296 {
297 ((void) buf);
298 ((void) buf_len);
299 return( -1 );
300 }
301
302 #define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE platform_nv_seed_write_uninit
303 #endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_WRITE */
304
305 int (*mbedtls_nv_seed_read)( unsigned char *buf, size_t buf_len ) =
306 MBEDTLS_PLATFORM_STD_NV_SEED_READ;
307 int (*mbedtls_nv_seed_write)( unsigned char *buf, size_t buf_len ) =
308 MBEDTLS_PLATFORM_STD_NV_SEED_WRITE;
309
310 int mbedtls_platform_set_nv_seed(
311 int (*nv_seed_read_func)( unsigned char *buf, size_t buf_len ),
312 int (*nv_seed_write_func)( unsigned char *buf, size_t buf_len ) )
313 {
314 mbedtls_nv_seed_read = nv_seed_read_func;
315 mbedtls_nv_seed_write = nv_seed_write_func;
316 return( 0 );
317 }
318 #endif /* MBEDTLS_PLATFORM_NV_SEED_ALT */
319 #endif /* MBEDTLS_ENTROPY_NV_SEED */
320
321 #if !defined(MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT)
322 /*
323 * Placeholder platform setup that does nothing by default
324 */
325 int mbedtls_platform_setup( mbedtls_platform_context *ctx )
326 {
327 (void)ctx;
328
329 return( 0 );
330 }
331
332 /*
333 * Placeholder platform teardown that does nothing by default
334 */
335 void mbedtls_platform_teardown( mbedtls_platform_context *ctx )
336 {
337 (void)ctx;
338 }
339 #endif /* MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT */
340
341 #endif /* MBEDTLS_PLATFORM_C */
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