mbed TLS v2.16.5

platform.h
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1
15 /*
16 * Copyright (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved
17 * SPDX-License-Identifier: Apache-2.0
18 *
19 * Licensed under the Apache License, Version 2.0 (the "License"); you may
20 * not use this file except in compliance with the License.
21 * You may obtain a copy of the License at
22 *
23 * http://www.apache.org/licenses/LICENSE-2.0
24 *
25 * Unless required by applicable law or agreed to in writing, software
26 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
27 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
28 * See the License for the specific language governing permissions and
29 * limitations under the License.
30 *
31 * This file is part of Mbed TLS (https://tls.mbed.org)
32 */
33 #ifndef MBEDTLS_PLATFORM_H
34 #define MBEDTLS_PLATFORM_H
35
36 #if !defined(MBEDTLS_CONFIG_FILE)
37 #include "config.h"
38 #else
39 #include MBEDTLS_CONFIG_FILE
40 #endif
41
42 #if defined(MBEDTLS_HAVE_TIME)
43 #include "platform_time.h"
44 #endif
45
46 #define MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED -0x0070
47 #define MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED -0x0072
49 #ifdef __cplusplus
50 extern "C" {
51 #endif
52
61 #if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS)
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <time.h>
65 #if !defined(MBEDTLS_PLATFORM_STD_SNPRINTF)
66 #if defined(_WIN32)
67 #define MBEDTLS_PLATFORM_STD_SNPRINTF mbedtls_platform_win32_snprintf
68 #else
69 #define MBEDTLS_PLATFORM_STD_SNPRINTF snprintf
70 #endif
71 #endif
72 #if !defined(MBEDTLS_PLATFORM_STD_PRINTF)
73 #define MBEDTLS_PLATFORM_STD_PRINTF printf
74 #endif
75 #if !defined(MBEDTLS_PLATFORM_STD_FPRINTF)
76 #define MBEDTLS_PLATFORM_STD_FPRINTF fprintf
77 #endif
78 #if !defined(MBEDTLS_PLATFORM_STD_CALLOC)
79 #define MBEDTLS_PLATFORM_STD_CALLOC calloc
80 #endif
81 #if !defined(MBEDTLS_PLATFORM_STD_FREE)
82 #define MBEDTLS_PLATFORM_STD_FREE free
83 #endif
84 #if !defined(MBEDTLS_PLATFORM_STD_EXIT)
85 #define MBEDTLS_PLATFORM_STD_EXIT exit
86 #endif
87 #if !defined(MBEDTLS_PLATFORM_STD_TIME)
88 #define MBEDTLS_PLATFORM_STD_TIME time
89 #endif
90 #if !defined(MBEDTLS_PLATFORM_STD_EXIT_SUCCESS)
91 #define MBEDTLS_PLATFORM_STD_EXIT_SUCCESS EXIT_SUCCESS
92 #endif
93 #if !defined(MBEDTLS_PLATFORM_STD_EXIT_FAILURE)
94 #define MBEDTLS_PLATFORM_STD_EXIT_FAILURE EXIT_FAILURE
95 #endif
96 #if defined(MBEDTLS_FS_IO)
97 #if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ)
98 #define MBEDTLS_PLATFORM_STD_NV_SEED_READ mbedtls_platform_std_nv_seed_read
99 #endif
100 #if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE)
101 #define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE mbedtls_platform_std_nv_seed_write
102 #endif
103 #if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_FILE)
104 #define MBEDTLS_PLATFORM_STD_NV_SEED_FILE "seedfile"
105 #endif
106 #endif /* MBEDTLS_FS_IO */
107 #else /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */
108 #if defined(MBEDTLS_PLATFORM_STD_MEM_HDR)
109 #include MBEDTLS_PLATFORM_STD_MEM_HDR
110 #endif
111 #endif /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */
112
113
114 /* \} name SECTION: Module settings */
115
116 /*
117 * The function pointers for calloc and free.
118 */
119 #if defined(MBEDTLS_PLATFORM_MEMORY)
120 #if defined(MBEDTLS_PLATFORM_FREE_MACRO) && \
121 defined(MBEDTLS_PLATFORM_CALLOC_MACRO)
122 #define mbedtls_free MBEDTLS_PLATFORM_FREE_MACRO
123 #define mbedtls_calloc MBEDTLS_PLATFORM_CALLOC_MACRO
124 #else
125 /* For size_t */
126 #include <stddef.h>
127 extern void *mbedtls_calloc( size_t n, size_t size );
128 extern void mbedtls_free( void *ptr );
129
139 int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ),
140 void (*free_func)( void * ) );
141 #endif /* MBEDTLS_PLATFORM_FREE_MACRO && MBEDTLS_PLATFORM_CALLOC_MACRO */
142 #else /* !MBEDTLS_PLATFORM_MEMORY */
143 #define mbedtls_free free
144 #define mbedtls_calloc calloc
145 #endif /* MBEDTLS_PLATFORM_MEMORY && !MBEDTLS_PLATFORM_{FREE,CALLOC}_MACRO */
146
147 /*
148 * The function pointers for fprintf
149 */
150 #if defined(MBEDTLS_PLATFORM_FPRINTF_ALT)
151 /* We need FILE * */
152 #include <stdio.h>
153 extern int (*mbedtls_fprintf)( FILE *stream, const char *format, ... );
154
164 int mbedtls_platform_set_fprintf( int (*fprintf_func)( FILE *stream, const char *,
165 ... ) );
166 #else
167 #if defined(MBEDTLS_PLATFORM_FPRINTF_MACRO)
168 #define mbedtls_fprintf MBEDTLS_PLATFORM_FPRINTF_MACRO
169 #else
170 #define mbedtls_fprintf fprintf
171 #endif /* MBEDTLS_PLATFORM_FPRINTF_MACRO */
172 #endif /* MBEDTLS_PLATFORM_FPRINTF_ALT */
173
174 /*
175 * The function pointers for printf
176 */
177 #if defined(MBEDTLS_PLATFORM_PRINTF_ALT)
178 extern int (*mbedtls_printf)( const char *format, ... );
179
189 int mbedtls_platform_set_printf( int (*printf_func)( const char *, ... ) );
190 #else /* !MBEDTLS_PLATFORM_PRINTF_ALT */
191 #if defined(MBEDTLS_PLATFORM_PRINTF_MACRO)
192 #define mbedtls_printf MBEDTLS_PLATFORM_PRINTF_MACRO
193 #else
194 #define mbedtls_printf printf
195 #endif /* MBEDTLS_PLATFORM_PRINTF_MACRO */
196 #endif /* MBEDTLS_PLATFORM_PRINTF_ALT */
197
198 /*
199 * The function pointers for snprintf
200 *
201 * The snprintf implementation should conform to C99:
202 * - it *must* always correctly zero-terminate the buffer
203 * (except when n == 0, then it must leave the buffer untouched)
204 * - however it is acceptable to return -1 instead of the required length when
205 * the destination buffer is too short.
206 */
207 #if defined(_WIN32)
208 /* For Windows (inc. MSYS2), we provide our own fixed implementation */
209 int mbedtls_platform_win32_snprintf( char *s, size_t n, const char *fmt, ... );
210 #endif
211
212 #if defined(MBEDTLS_PLATFORM_SNPRINTF_ALT)
213 extern int (*mbedtls_snprintf)( char * s, size_t n, const char * format, ... );
214
223 int mbedtls_platform_set_snprintf( int (*snprintf_func)( char * s, size_t n,
224 const char * format, ... ) );
225 #else /* MBEDTLS_PLATFORM_SNPRINTF_ALT */
226 #if defined(MBEDTLS_PLATFORM_SNPRINTF_MACRO)
227 #define mbedtls_snprintf MBEDTLS_PLATFORM_SNPRINTF_MACRO
228 #else
229 #define mbedtls_snprintf MBEDTLS_PLATFORM_STD_SNPRINTF
230 #endif /* MBEDTLS_PLATFORM_SNPRINTF_MACRO */
231 #endif /* MBEDTLS_PLATFORM_SNPRINTF_ALT */
232
233 /*
234 * The function pointers for exit
235 */
236 #if defined(MBEDTLS_PLATFORM_EXIT_ALT)
237 extern void (*mbedtls_exit)( int status );
238
248 int mbedtls_platform_set_exit( void (*exit_func)( int status ) );
249 #else
250 #if defined(MBEDTLS_PLATFORM_EXIT_MACRO)
251 #define mbedtls_exit MBEDTLS_PLATFORM_EXIT_MACRO
252 #else
253 #define mbedtls_exit exit
254 #endif /* MBEDTLS_PLATFORM_EXIT_MACRO */
255 #endif /* MBEDTLS_PLATFORM_EXIT_ALT */
256
257 /*
258 * The default exit values
259 */
260 #if defined(MBEDTLS_PLATFORM_STD_EXIT_SUCCESS)
261 #define MBEDTLS_EXIT_SUCCESS MBEDTLS_PLATFORM_STD_EXIT_SUCCESS
262 #else
263 #define MBEDTLS_EXIT_SUCCESS 0
264 #endif
265 #if defined(MBEDTLS_PLATFORM_STD_EXIT_FAILURE)
266 #define MBEDTLS_EXIT_FAILURE MBEDTLS_PLATFORM_STD_EXIT_FAILURE
267 #else
268 #define MBEDTLS_EXIT_FAILURE 1
269 #endif
270
271 /*
272 * The function pointers for reading from and writing a seed file to
273 * Non-Volatile storage (NV) in a platform-independent way
274 *
275 * Only enabled when the NV seed entropy source is enabled
276 */
277 #if defined(MBEDTLS_ENTROPY_NV_SEED)
278 #if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS) && defined(MBEDTLS_FS_IO)
279 /* Internal standard platform definitions */
280 int mbedtls_platform_std_nv_seed_read( unsigned char *buf, size_t buf_len );
281 int mbedtls_platform_std_nv_seed_write( unsigned char *buf, size_t buf_len );
282 #endif
283
284 #if defined(MBEDTLS_PLATFORM_NV_SEED_ALT)
285 extern int (*mbedtls_nv_seed_read)( unsigned char *buf, size_t buf_len );
286 extern int (*mbedtls_nv_seed_write)( unsigned char *buf, size_t buf_len );
287
297 int mbedtls_platform_set_nv_seed(
298 int (*nv_seed_read_func)( unsigned char *buf, size_t buf_len ),
299 int (*nv_seed_write_func)( unsigned char *buf, size_t buf_len )
300 );
301 #else
302 #if defined(MBEDTLS_PLATFORM_NV_SEED_READ_MACRO) && \
303 defined(MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO)
304 #define mbedtls_nv_seed_read MBEDTLS_PLATFORM_NV_SEED_READ_MACRO
305 #define mbedtls_nv_seed_write MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO
306 #else
307 #define mbedtls_nv_seed_read mbedtls_platform_std_nv_seed_read
308 #define mbedtls_nv_seed_write mbedtls_platform_std_nv_seed_write
309 #endif
310 #endif /* MBEDTLS_PLATFORM_NV_SEED_ALT */
311 #endif /* MBEDTLS_ENTROPY_NV_SEED */
312
313 #if !defined(MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT)
314
321 typedef struct mbedtls_platform_context
322 {
323 char dummy;
324 }
325 mbedtls_platform_context;
326
327 #else
328 #include "platform_alt.h"
329 #endif /* !MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT */
330
346 int mbedtls_platform_setup( mbedtls_platform_context *ctx );
361 void mbedtls_platform_teardown( mbedtls_platform_context *ctx );
362
363 #ifdef __cplusplus
364 }
365 #endif
366
367 #endif /* platform.h */
mbedtls_platform_setup
int mbedtls_platform_setup(mbedtls_platform_context *ctx)
This function performs any platform-specific initialization operations.
mbedtls_printf
#define mbedtls_printf
Definition: platform.h:194
mbedtls_platform_teardown
void mbedtls_platform_teardown(mbedtls_platform_context *ctx)
This function performs any platform teardown operations.
mbedtls_exit
#define mbedtls_exit
Definition: platform.h:253
mbedtls_snprintf
#define mbedtls_snprintf
Definition: platform.h:229
mbedtls_platform_context
The platform context structure.
Definition: platform.h:321
mbedtls_platform_context::dummy
char dummy
Definition: platform.h:323
platform_time.h
mbed TLS Platform time abstraction
mbedtls_free
#define mbedtls_free
Definition: platform.h:143
mbedtls_calloc
#define mbedtls_calloc
Definition: platform.h:144
config.h
Configuration options (set of defines)
mbedtls_platform_context
struct mbedtls_platform_context mbedtls_platform_context
The platform context structure.
mbedtls_fprintf
#define mbedtls_fprintf
Definition: platform.h:170