Mark Radbourne / mbedtls

mbed TLS Build

Dependents:   Encrypt_Decrypt1 mbed_blink_tls encrypt encrypt

library/platform.c@0:cdf462088d13, 2017-01-05 (annotated)

Committer:
markrad
Date:
Thu Jan 05 00:18:44 2017 +0000
Revision:
0:cdf462088d13
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
markrad 0:cdf462088d13 1 /*
markrad 0:cdf462088d13 2 * Platform abstraction layer
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
markrad 0:cdf462088d13 5 * SPDX-License-Identifier: Apache-2.0
markrad 0:cdf462088d13 6 *
markrad 0:cdf462088d13 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad 0:cdf462088d13 8 * not use this file except in compliance with the License.
markrad 0:cdf462088d13 9 * You may obtain a copy of the License at
markrad 0:cdf462088d13 10 *
markrad 0:cdf462088d13 11 * http://www.apache.org/licenses/LICENSE-2.0
markrad 0:cdf462088d13 12 *
markrad 0:cdf462088d13 13 * Unless required by applicable law or agreed to in writing, software
markrad 0:cdf462088d13 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad 0:cdf462088d13 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad 0:cdf462088d13 16 * See the License for the specific language governing permissions and
markrad 0:cdf462088d13 17 * limitations under the License.
markrad 0:cdf462088d13 18 *
markrad 0:cdf462088d13 19 * This file is part of mbed TLS (https://tls.mbed.org)
markrad 0:cdf462088d13 20 */
markrad 0:cdf462088d13 21
markrad 0:cdf462088d13 22 #if !defined(MBEDTLS_CONFIG_FILE)
markrad 0:cdf462088d13 23 #include "mbedtls/config.h"
markrad 0:cdf462088d13 24 #else
markrad 0:cdf462088d13 25 #include MBEDTLS_CONFIG_FILE
markrad 0:cdf462088d13 26 #endif
markrad 0:cdf462088d13 27
markrad 0:cdf462088d13 28 #if defined(MBEDTLS_PLATFORM_C)
markrad 0:cdf462088d13 29
markrad 0:cdf462088d13 30 #include "mbedtls/platform.h"
markrad 0:cdf462088d13 31
markrad 0:cdf462088d13 32 #if defined(MBEDTLS_PLATFORM_MEMORY)
markrad 0:cdf462088d13 33 #if !defined(MBEDTLS_PLATFORM_STD_CALLOC)
markrad 0:cdf462088d13 34 static void *platform_calloc_uninit( size_t n, size_t size )
markrad 0:cdf462088d13 35 {
markrad 0:cdf462088d13 36 ((void) n);
markrad 0:cdf462088d13 37 ((void) size);
markrad 0:cdf462088d13 38 return( NULL );
markrad 0:cdf462088d13 39 }
markrad 0:cdf462088d13 40
markrad 0:cdf462088d13 41 #define MBEDTLS_PLATFORM_STD_CALLOC platform_calloc_uninit
markrad 0:cdf462088d13 42 #endif /* !MBEDTLS_PLATFORM_STD_CALLOC */
markrad 0:cdf462088d13 43
markrad 0:cdf462088d13 44 #if !defined(MBEDTLS_PLATFORM_STD_FREE)
markrad 0:cdf462088d13 45 static void platform_free_uninit( void *ptr )
markrad 0:cdf462088d13 46 {
markrad 0:cdf462088d13 47 ((void) ptr);
markrad 0:cdf462088d13 48 }
markrad 0:cdf462088d13 49
markrad 0:cdf462088d13 50 #define MBEDTLS_PLATFORM_STD_FREE platform_free_uninit
markrad 0:cdf462088d13 51 #endif /* !MBEDTLS_PLATFORM_STD_FREE */
markrad 0:cdf462088d13 52
markrad 0:cdf462088d13 53 void * (*mbedtls_calloc)( size_t, size_t ) = MBEDTLS_PLATFORM_STD_CALLOC;
markrad 0:cdf462088d13 54 void (*mbedtls_free)( void * ) = MBEDTLS_PLATFORM_STD_FREE;
markrad 0:cdf462088d13 55
markrad 0:cdf462088d13 56 int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ),
markrad 0:cdf462088d13 57 void (*free_func)( void * ) )
markrad 0:cdf462088d13 58 {
markrad 0:cdf462088d13 59 mbedtls_calloc = calloc_func;
markrad 0:cdf462088d13 60 mbedtls_free = free_func;
markrad 0:cdf462088d13 61 return( 0 );
markrad 0:cdf462088d13 62 }
markrad 0:cdf462088d13 63 #endif /* MBEDTLS_PLATFORM_MEMORY */
markrad 0:cdf462088d13 64
markrad 0:cdf462088d13 65 #if defined(_WIN32)
markrad 0:cdf462088d13 66 #include <stdarg.h>
markrad 0:cdf462088d13 67 int mbedtls_platform_win32_snprintf( char *s, size_t n, const char *fmt, ... )
markrad 0:cdf462088d13 68 {
markrad 0:cdf462088d13 69 int ret;
markrad 0:cdf462088d13 70 va_list argp;
markrad 0:cdf462088d13 71
markrad 0:cdf462088d13 72 /* Avoid calling the invalid parameter handler by checking ourselves */
markrad 0:cdf462088d13 73 if( s == NULL || n == 0 || fmt == NULL )
markrad 0:cdf462088d13 74 return( -1 );
markrad 0:cdf462088d13 75
markrad 0:cdf462088d13 76 va_start( argp, fmt );
markrad 0:cdf462088d13 77 #if defined(_TRUNCATE)
markrad 0:cdf462088d13 78 ret = _vsnprintf_s( s, n, _TRUNCATE, fmt, argp );
markrad 0:cdf462088d13 79 #else
markrad 0:cdf462088d13 80 ret = _vsnprintf( s, n, fmt, argp );
markrad 0:cdf462088d13 81 if( ret < 0 || (size_t) ret == n )
markrad 0:cdf462088d13 82 {
markrad 0:cdf462088d13 83 s[n-1] = '\0';
markrad 0:cdf462088d13 84 ret = -1;
markrad 0:cdf462088d13 85 }
markrad 0:cdf462088d13 86 #endif
markrad 0:cdf462088d13 87 va_end( argp );
markrad 0:cdf462088d13 88
markrad 0:cdf462088d13 89 return( ret );
markrad 0:cdf462088d13 90 }
markrad 0:cdf462088d13 91 #endif
markrad 0:cdf462088d13 92
markrad 0:cdf462088d13 93 #if defined(MBEDTLS_PLATFORM_SNPRINTF_ALT)
markrad 0:cdf462088d13 94 #if !defined(MBEDTLS_PLATFORM_STD_SNPRINTF)
markrad 0:cdf462088d13 95 /*
markrad 0:cdf462088d13 96 * Make dummy function to prevent NULL pointer dereferences
markrad 0:cdf462088d13 97 */
markrad 0:cdf462088d13 98 static int platform_snprintf_uninit( char * s, size_t n,
markrad 0:cdf462088d13 99 const char * format, ... )
markrad 0:cdf462088d13 100 {
markrad 0:cdf462088d13 101 ((void) s);
markrad 0:cdf462088d13 102 ((void) n);
markrad 0:cdf462088d13 103 ((void) format);
markrad 0:cdf462088d13 104 return( 0 );
markrad 0:cdf462088d13 105 }
markrad 0:cdf462088d13 106
markrad 0:cdf462088d13 107 #define MBEDTLS_PLATFORM_STD_SNPRINTF platform_snprintf_uninit
markrad 0:cdf462088d13 108 #endif /* !MBEDTLS_PLATFORM_STD_SNPRINTF */
markrad 0:cdf462088d13 109
markrad 0:cdf462088d13 110 int (*mbedtls_snprintf)( char * s, size_t n,
markrad 0:cdf462088d13 111 const char * format,
markrad 0:cdf462088d13 112 ... ) = MBEDTLS_PLATFORM_STD_SNPRINTF;
markrad 0:cdf462088d13 113
markrad 0:cdf462088d13 114 int mbedtls_platform_set_snprintf( int (*snprintf_func)( char * s, size_t n,
markrad 0:cdf462088d13 115 const char * format,
markrad 0:cdf462088d13 116 ... ) )
markrad 0:cdf462088d13 117 {
markrad 0:cdf462088d13 118 mbedtls_snprintf = snprintf_func;
markrad 0:cdf462088d13 119 return( 0 );
markrad 0:cdf462088d13 120 }
markrad 0:cdf462088d13 121 #endif /* MBEDTLS_PLATFORM_SNPRINTF_ALT */
markrad 0:cdf462088d13 122
markrad 0:cdf462088d13 123 #if defined(MBEDTLS_PLATFORM_PRINTF_ALT)
markrad 0:cdf462088d13 124 #if !defined(MBEDTLS_PLATFORM_STD_PRINTF)
markrad 0:cdf462088d13 125 /*
markrad 0:cdf462088d13 126 * Make dummy function to prevent NULL pointer dereferences
markrad 0:cdf462088d13 127 */
markrad 0:cdf462088d13 128 static int platform_printf_uninit( const char *format, ... )
markrad 0:cdf462088d13 129 {
markrad 0:cdf462088d13 130 ((void) format);
markrad 0:cdf462088d13 131 return( 0 );
markrad 0:cdf462088d13 132 }
markrad 0:cdf462088d13 133
markrad 0:cdf462088d13 134 #define MBEDTLS_PLATFORM_STD_PRINTF platform_printf_uninit
markrad 0:cdf462088d13 135 #endif /* !MBEDTLS_PLATFORM_STD_PRINTF */
markrad 0:cdf462088d13 136
markrad 0:cdf462088d13 137 int (*mbedtls_printf)( const char *, ... ) = MBEDTLS_PLATFORM_STD_PRINTF;
markrad 0:cdf462088d13 138
markrad 0:cdf462088d13 139 int mbedtls_platform_set_printf( int (*printf_func)( const char *, ... ) )
markrad 0:cdf462088d13 140 {
markrad 0:cdf462088d13 141 mbedtls_printf = printf_func;
markrad 0:cdf462088d13 142 return( 0 );
markrad 0:cdf462088d13 143 }
markrad 0:cdf462088d13 144 #endif /* MBEDTLS_PLATFORM_PRINTF_ALT */
markrad 0:cdf462088d13 145
markrad 0:cdf462088d13 146 #if defined(MBEDTLS_PLATFORM_FPRINTF_ALT)
markrad 0:cdf462088d13 147 #if !defined(MBEDTLS_PLATFORM_STD_FPRINTF)
markrad 0:cdf462088d13 148 /*
markrad 0:cdf462088d13 149 * Make dummy function to prevent NULL pointer dereferences
markrad 0:cdf462088d13 150 */
markrad 0:cdf462088d13 151 static int platform_fprintf_uninit( FILE *stream, const char *format, ... )
markrad 0:cdf462088d13 152 {
markrad 0:cdf462088d13 153 ((void) stream);
markrad 0:cdf462088d13 154 ((void) format);
markrad 0:cdf462088d13 155 return( 0 );
markrad 0:cdf462088d13 156 }
markrad 0:cdf462088d13 157
markrad 0:cdf462088d13 158 #define MBEDTLS_PLATFORM_STD_FPRINTF platform_fprintf_uninit
markrad 0:cdf462088d13 159 #endif /* !MBEDTLS_PLATFORM_STD_FPRINTF */
markrad 0:cdf462088d13 160
markrad 0:cdf462088d13 161 int (*mbedtls_fprintf)( FILE *, const char *, ... ) =
markrad 0:cdf462088d13 162 MBEDTLS_PLATFORM_STD_FPRINTF;
markrad 0:cdf462088d13 163
markrad 0:cdf462088d13 164 int mbedtls_platform_set_fprintf( int (*fprintf_func)( FILE *, const char *, ... ) )
markrad 0:cdf462088d13 165 {
markrad 0:cdf462088d13 166 mbedtls_fprintf = fprintf_func;
markrad 0:cdf462088d13 167 return( 0 );
markrad 0:cdf462088d13 168 }
markrad 0:cdf462088d13 169 #endif /* MBEDTLS_PLATFORM_FPRINTF_ALT */
markrad 0:cdf462088d13 170
markrad 0:cdf462088d13 171 #if defined(MBEDTLS_PLATFORM_EXIT_ALT)
markrad 0:cdf462088d13 172 #if !defined(MBEDTLS_PLATFORM_STD_EXIT)
markrad 0:cdf462088d13 173 /*
markrad 0:cdf462088d13 174 * Make dummy function to prevent NULL pointer dereferences
markrad 0:cdf462088d13 175 */
markrad 0:cdf462088d13 176 static void platform_exit_uninit( int status )
markrad 0:cdf462088d13 177 {
markrad 0:cdf462088d13 178 ((void) status);
markrad 0:cdf462088d13 179 }
markrad 0:cdf462088d13 180
markrad 0:cdf462088d13 181 #define MBEDTLS_PLATFORM_STD_EXIT platform_exit_uninit
markrad 0:cdf462088d13 182 #endif /* !MBEDTLS_PLATFORM_STD_EXIT */
markrad 0:cdf462088d13 183
markrad 0:cdf462088d13 184 void (*mbedtls_exit)( int status ) = MBEDTLS_PLATFORM_STD_EXIT;
markrad 0:cdf462088d13 185
markrad 0:cdf462088d13 186 int mbedtls_platform_set_exit( void (*exit_func)( int status ) )
markrad 0:cdf462088d13 187 {
markrad 0:cdf462088d13 188 mbedtls_exit = exit_func;
markrad 0:cdf462088d13 189 return( 0 );
markrad 0:cdf462088d13 190 }
markrad 0:cdf462088d13 191 #endif /* MBEDTLS_PLATFORM_EXIT_ALT */
markrad 0:cdf462088d13 192
markrad 0:cdf462088d13 193 #if defined(MBEDTLS_HAVE_TIME)
markrad 0:cdf462088d13 194
markrad 0:cdf462088d13 195 #if defined(MBEDTLS_PLATFORM_TIME_ALT)
markrad 0:cdf462088d13 196 #if !defined(MBEDTLS_PLATFORM_STD_TIME)
markrad 0:cdf462088d13 197 /*
markrad 0:cdf462088d13 198 * Make dummy function to prevent NULL pointer dereferences
markrad 0:cdf462088d13 199 */
markrad 0:cdf462088d13 200 static mbedtls_time_t platform_time_uninit( mbedtls_time_t* timer )
markrad 0:cdf462088d13 201 {
markrad 0:cdf462088d13 202 ((void) timer);
markrad 0:cdf462088d13 203 return( 0 );
markrad 0:cdf462088d13 204 }
markrad 0:cdf462088d13 205
markrad 0:cdf462088d13 206 #define MBEDTLS_PLATFORM_STD_TIME platform_time_uninit
markrad 0:cdf462088d13 207 #endif /* !MBEDTLS_PLATFORM_STD_TIME */
markrad 0:cdf462088d13 208
markrad 0:cdf462088d13 209 mbedtls_time_t (*mbedtls_time)( mbedtls_time_t* timer ) = MBEDTLS_PLATFORM_STD_TIME;
markrad 0:cdf462088d13 210
markrad 0:cdf462088d13 211 int mbedtls_platform_set_time( mbedtls_time_t (*time_func)( mbedtls_time_t* timer ) )
markrad 0:cdf462088d13 212 {
markrad 0:cdf462088d13 213 mbedtls_time = time_func;
markrad 0:cdf462088d13 214 return( 0 );
markrad 0:cdf462088d13 215 }
markrad 0:cdf462088d13 216 #endif /* MBEDTLS_PLATFORM_TIME_ALT */
markrad 0:cdf462088d13 217
markrad 0:cdf462088d13 218 #endif /* MBEDTLS_HAVE_TIME */
markrad 0:cdf462088d13 219
markrad 0:cdf462088d13 220 #if defined(MBEDTLS_ENTROPY_NV_SEED)
markrad 0:cdf462088d13 221 #if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS) && defined(MBEDTLS_FS_IO)
markrad 0:cdf462088d13 222 /* Default implementations for the platform independent seed functions use
markrad 0:cdf462088d13 223 * standard libc file functions to read from and write to a pre-defined filename
markrad 0:cdf462088d13 224 */
markrad 0:cdf462088d13 225 int mbedtls_platform_std_nv_seed_read( unsigned char *buf, size_t buf_len )
markrad 0:cdf462088d13 226 {
markrad 0:cdf462088d13 227 FILE *file;
markrad 0:cdf462088d13 228 size_t n;
markrad 0:cdf462088d13 229
markrad 0:cdf462088d13 230 if( ( file = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "rb" ) ) == NULL )
markrad 0:cdf462088d13 231 return -1;
markrad 0:cdf462088d13 232
markrad 0:cdf462088d13 233 if( ( n = fread( buf, 1, buf_len, file ) ) != buf_len )
markrad 0:cdf462088d13 234 {
markrad 0:cdf462088d13 235 fclose( file );
markrad 0:cdf462088d13 236 return -1;
markrad 0:cdf462088d13 237 }
markrad 0:cdf462088d13 238
markrad 0:cdf462088d13 239 fclose( file );
markrad 0:cdf462088d13 240 return( (int)n );
markrad 0:cdf462088d13 241 }
markrad 0:cdf462088d13 242
markrad 0:cdf462088d13 243 int mbedtls_platform_std_nv_seed_write( unsigned char *buf, size_t buf_len )
markrad 0:cdf462088d13 244 {
markrad 0:cdf462088d13 245 FILE *file;
markrad 0:cdf462088d13 246 size_t n;
markrad 0:cdf462088d13 247
markrad 0:cdf462088d13 248 if( ( file = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "w" ) ) == NULL )
markrad 0:cdf462088d13 249 return -1;
markrad 0:cdf462088d13 250
markrad 0:cdf462088d13 251 if( ( n = fwrite( buf, 1, buf_len, file ) ) != buf_len )
markrad 0:cdf462088d13 252 {
markrad 0:cdf462088d13 253 fclose( file );
markrad 0:cdf462088d13 254 return -1;
markrad 0:cdf462088d13 255 }
markrad 0:cdf462088d13 256
markrad 0:cdf462088d13 257 fclose( file );
markrad 0:cdf462088d13 258 return( (int)n );
markrad 0:cdf462088d13 259 }
markrad 0:cdf462088d13 260 #endif /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */
markrad 0:cdf462088d13 261
markrad 0:cdf462088d13 262 #if defined(MBEDTLS_PLATFORM_NV_SEED_ALT)
markrad 0:cdf462088d13 263 #if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ)
markrad 0:cdf462088d13 264 /*
markrad 0:cdf462088d13 265 * Make dummy function to prevent NULL pointer dereferences
markrad 0:cdf462088d13 266 */
markrad 0:cdf462088d13 267 static int platform_nv_seed_read_uninit( unsigned char *buf, size_t buf_len )
markrad 0:cdf462088d13 268 {
markrad 0:cdf462088d13 269 ((void) buf);
markrad 0:cdf462088d13 270 ((void) buf_len);
markrad 0:cdf462088d13 271 return( -1 );
markrad 0:cdf462088d13 272 }
markrad 0:cdf462088d13 273
markrad 0:cdf462088d13 274 #define MBEDTLS_PLATFORM_STD_NV_SEED_READ platform_nv_seed_read_uninit
markrad 0:cdf462088d13 275 #endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_READ */
markrad 0:cdf462088d13 276
markrad 0:cdf462088d13 277 #if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE)
markrad 0:cdf462088d13 278 /*
markrad 0:cdf462088d13 279 * Make dummy function to prevent NULL pointer dereferences
markrad 0:cdf462088d13 280 */
markrad 0:cdf462088d13 281 static int platform_nv_seed_write_uninit( unsigned char *buf, size_t buf_len )
markrad 0:cdf462088d13 282 {
markrad 0:cdf462088d13 283 ((void) buf);
markrad 0:cdf462088d13 284 ((void) buf_len);
markrad 0:cdf462088d13 285 return( -1 );
markrad 0:cdf462088d13 286 }
markrad 0:cdf462088d13 287
markrad 0:cdf462088d13 288 #define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE platform_nv_seed_write_uninit
markrad 0:cdf462088d13 289 #endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_WRITE */
markrad 0:cdf462088d13 290
markrad 0:cdf462088d13 291 int (*mbedtls_nv_seed_read)( unsigned char *buf, size_t buf_len ) =
markrad 0:cdf462088d13 292 MBEDTLS_PLATFORM_STD_NV_SEED_READ;
markrad 0:cdf462088d13 293 int (*mbedtls_nv_seed_write)( unsigned char *buf, size_t buf_len ) =
markrad 0:cdf462088d13 294 MBEDTLS_PLATFORM_STD_NV_SEED_WRITE;
markrad 0:cdf462088d13 295
markrad 0:cdf462088d13 296 int mbedtls_platform_set_nv_seed(
markrad 0:cdf462088d13 297 int (*nv_seed_read_func)( unsigned char *buf, size_t buf_len ),
markrad 0:cdf462088d13 298 int (*nv_seed_write_func)( unsigned char *buf, size_t buf_len ) )
markrad 0:cdf462088d13 299 {
markrad 0:cdf462088d13 300 mbedtls_nv_seed_read = nv_seed_read_func;
markrad 0:cdf462088d13 301 mbedtls_nv_seed_write = nv_seed_write_func;
markrad 0:cdf462088d13 302 return( 0 );
markrad 0:cdf462088d13 303 }
markrad 0:cdf462088d13 304 #endif /* MBEDTLS_PLATFORM_NV_SEED_ALT */
markrad 0:cdf462088d13 305 #endif /* MBEDTLS_ENTROPY_NV_SEED */
markrad 0:cdf462088d13 306
markrad 0:cdf462088d13 307 #endif /* MBEDTLS_PLATFORM_C */