erkin yucel / mbed-os

mbed os with nrf51 internal bandgap enabled to read battery level

Dependents:   BLE_file_test BLE_Blink ExternalEncoder

features/mbedtls/src/md.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /**
elessair 0:f269e3021894 2 * \file mbedtls_md.c
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * \brief Generic message digest wrapper for mbed TLS
elessair 0:f269e3021894 5 *
elessair 0:f269e3021894 6 * \author Adriaan de Jong <dejong@fox-it.com>
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
elessair 0:f269e3021894 9 * SPDX-License-Identifier: Apache-2.0
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * Licensed under the Apache License, Version 2.0 (the "License"); you may
elessair 0:f269e3021894 12 * not use this file except in compliance with the License.
elessair 0:f269e3021894 13 * You may obtain a copy of the License at
elessair 0:f269e3021894 14 *
elessair 0:f269e3021894 15 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 16 *
elessair 0:f269e3021894 17 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 18 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
elessair 0:f269e3021894 19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 20 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 21 * limitations under the License.
elessair 0:f269e3021894 22 *
elessair 0:f269e3021894 23 * This file is part of mbed TLS (https://tls.mbed.org)
elessair 0:f269e3021894 24 */
elessair 0:f269e3021894 25
elessair 0:f269e3021894 26 #if !defined(MBEDTLS_CONFIG_FILE)
elessair 0:f269e3021894 27 #include "mbedtls/config.h"
elessair 0:f269e3021894 28 #else
elessair 0:f269e3021894 29 #include MBEDTLS_CONFIG_FILE
elessair 0:f269e3021894 30 #endif
elessair 0:f269e3021894 31
elessair 0:f269e3021894 32 #if defined(MBEDTLS_MD_C)
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34 #include "mbedtls/md.h"
elessair 0:f269e3021894 35 #include "mbedtls/md_internal.h"
elessair 0:f269e3021894 36
elessair 0:f269e3021894 37 #if defined(MBEDTLS_PLATFORM_C)
elessair 0:f269e3021894 38 #include "mbedtls/platform.h"
elessair 0:f269e3021894 39 #else
elessair 0:f269e3021894 40 #include <stdlib.h>
elessair 0:f269e3021894 41 #define mbedtls_calloc calloc
elessair 0:f269e3021894 42 #define mbedtls_free free
elessair 0:f269e3021894 43 #endif
elessair 0:f269e3021894 44
elessair 0:f269e3021894 45 #include <string.h>
elessair 0:f269e3021894 46
elessair 0:f269e3021894 47 #if defined(MBEDTLS_FS_IO)
elessair 0:f269e3021894 48 #include <stdio.h>
elessair 0:f269e3021894 49 #endif
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 /* Implementation that should never be optimized out by the compiler */
elessair 0:f269e3021894 52 static void mbedtls_zeroize( void *v, size_t n ) {
elessair 0:f269e3021894 53 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
elessair 0:f269e3021894 54 }
elessair 0:f269e3021894 55
elessair 0:f269e3021894 56 /*
elessair 0:f269e3021894 57 * Reminder: update profiles in x509_crt.c when adding a new hash!
elessair 0:f269e3021894 58 */
elessair 0:f269e3021894 59 static const int supported_digests[] = {
elessair 0:f269e3021894 60
elessair 0:f269e3021894 61 #if defined(MBEDTLS_SHA512_C)
elessair 0:f269e3021894 62 MBEDTLS_MD_SHA512,
elessair 0:f269e3021894 63 MBEDTLS_MD_SHA384,
elessair 0:f269e3021894 64 #endif
elessair 0:f269e3021894 65
elessair 0:f269e3021894 66 #if defined(MBEDTLS_SHA256_C)
elessair 0:f269e3021894 67 MBEDTLS_MD_SHA256,
elessair 0:f269e3021894 68 MBEDTLS_MD_SHA224,
elessair 0:f269e3021894 69 #endif
elessair 0:f269e3021894 70
elessair 0:f269e3021894 71 #if defined(MBEDTLS_SHA1_C)
elessair 0:f269e3021894 72 MBEDTLS_MD_SHA1,
elessair 0:f269e3021894 73 #endif
elessair 0:f269e3021894 74
elessair 0:f269e3021894 75 #if defined(MBEDTLS_RIPEMD160_C)
elessair 0:f269e3021894 76 MBEDTLS_MD_RIPEMD160,
elessair 0:f269e3021894 77 #endif
elessair 0:f269e3021894 78
elessair 0:f269e3021894 79 #if defined(MBEDTLS_MD5_C)
elessair 0:f269e3021894 80 MBEDTLS_MD_MD5,
elessair 0:f269e3021894 81 #endif
elessair 0:f269e3021894 82
elessair 0:f269e3021894 83 #if defined(MBEDTLS_MD4_C)
elessair 0:f269e3021894 84 MBEDTLS_MD_MD4,
elessair 0:f269e3021894 85 #endif
elessair 0:f269e3021894 86
elessair 0:f269e3021894 87 #if defined(MBEDTLS_MD2_C)
elessair 0:f269e3021894 88 MBEDTLS_MD_MD2,
elessair 0:f269e3021894 89 #endif
elessair 0:f269e3021894 90
elessair 0:f269e3021894 91 MBEDTLS_MD_NONE
elessair 0:f269e3021894 92 };
elessair 0:f269e3021894 93
elessair 0:f269e3021894 94 const int *mbedtls_md_list( void )
elessair 0:f269e3021894 95 {
elessair 0:f269e3021894 96 return( supported_digests );
elessair 0:f269e3021894 97 }
elessair 0:f269e3021894 98
elessair 0:f269e3021894 99 const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name )
elessair 0:f269e3021894 100 {
elessair 0:f269e3021894 101 if( NULL == md_name )
elessair 0:f269e3021894 102 return( NULL );
elessair 0:f269e3021894 103
elessair 0:f269e3021894 104 /* Get the appropriate digest information */
elessair 0:f269e3021894 105 #if defined(MBEDTLS_MD2_C)
elessair 0:f269e3021894 106 if( !strcmp( "MD2", md_name ) )
elessair 0:f269e3021894 107 return mbedtls_md_info_from_type( MBEDTLS_MD_MD2 );
elessair 0:f269e3021894 108 #endif
elessair 0:f269e3021894 109 #if defined(MBEDTLS_MD4_C)
elessair 0:f269e3021894 110 if( !strcmp( "MD4", md_name ) )
elessair 0:f269e3021894 111 return mbedtls_md_info_from_type( MBEDTLS_MD_MD4 );
elessair 0:f269e3021894 112 #endif
elessair 0:f269e3021894 113 #if defined(MBEDTLS_MD5_C)
elessair 0:f269e3021894 114 if( !strcmp( "MD5", md_name ) )
elessair 0:f269e3021894 115 return mbedtls_md_info_from_type( MBEDTLS_MD_MD5 );
elessair 0:f269e3021894 116 #endif
elessair 0:f269e3021894 117 #if defined(MBEDTLS_RIPEMD160_C)
elessair 0:f269e3021894 118 if( !strcmp( "RIPEMD160", md_name ) )
elessair 0:f269e3021894 119 return mbedtls_md_info_from_type( MBEDTLS_MD_RIPEMD160 );
elessair 0:f269e3021894 120 #endif
elessair 0:f269e3021894 121 #if defined(MBEDTLS_SHA1_C)
elessair 0:f269e3021894 122 if( !strcmp( "SHA1", md_name ) || !strcmp( "SHA", md_name ) )
elessair 0:f269e3021894 123 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
elessair 0:f269e3021894 124 #endif
elessair 0:f269e3021894 125 #if defined(MBEDTLS_SHA256_C)
elessair 0:f269e3021894 126 if( !strcmp( "SHA224", md_name ) )
elessair 0:f269e3021894 127 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA224 );
elessair 0:f269e3021894 128 if( !strcmp( "SHA256", md_name ) )
elessair 0:f269e3021894 129 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 );
elessair 0:f269e3021894 130 #endif
elessair 0:f269e3021894 131 #if defined(MBEDTLS_SHA512_C)
elessair 0:f269e3021894 132 if( !strcmp( "SHA384", md_name ) )
elessair 0:f269e3021894 133 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA384 );
elessair 0:f269e3021894 134 if( !strcmp( "SHA512", md_name ) )
elessair 0:f269e3021894 135 return mbedtls_md_info_from_type( MBEDTLS_MD_SHA512 );
elessair 0:f269e3021894 136 #endif
elessair 0:f269e3021894 137 return( NULL );
elessair 0:f269e3021894 138 }
elessair 0:f269e3021894 139
elessair 0:f269e3021894 140 const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type )
elessair 0:f269e3021894 141 {
elessair 0:f269e3021894 142 switch( md_type )
elessair 0:f269e3021894 143 {
elessair 0:f269e3021894 144 #if defined(MBEDTLS_MD2_C)
elessair 0:f269e3021894 145 case MBEDTLS_MD_MD2:
elessair 0:f269e3021894 146 return( &mbedtls_md2_info );
elessair 0:f269e3021894 147 #endif
elessair 0:f269e3021894 148 #if defined(MBEDTLS_MD4_C)
elessair 0:f269e3021894 149 case MBEDTLS_MD_MD4:
elessair 0:f269e3021894 150 return( &mbedtls_md4_info );
elessair 0:f269e3021894 151 #endif
elessair 0:f269e3021894 152 #if defined(MBEDTLS_MD5_C)
elessair 0:f269e3021894 153 case MBEDTLS_MD_MD5:
elessair 0:f269e3021894 154 return( &mbedtls_md5_info );
elessair 0:f269e3021894 155 #endif
elessair 0:f269e3021894 156 #if defined(MBEDTLS_RIPEMD160_C)
elessair 0:f269e3021894 157 case MBEDTLS_MD_RIPEMD160:
elessair 0:f269e3021894 158 return( &mbedtls_ripemd160_info );
elessair 0:f269e3021894 159 #endif
elessair 0:f269e3021894 160 #if defined(MBEDTLS_SHA1_C)
elessair 0:f269e3021894 161 case MBEDTLS_MD_SHA1:
elessair 0:f269e3021894 162 return( &mbedtls_sha1_info );
elessair 0:f269e3021894 163 #endif
elessair 0:f269e3021894 164 #if defined(MBEDTLS_SHA256_C)
elessair 0:f269e3021894 165 case MBEDTLS_MD_SHA224:
elessair 0:f269e3021894 166 return( &mbedtls_sha224_info );
elessair 0:f269e3021894 167 case MBEDTLS_MD_SHA256:
elessair 0:f269e3021894 168 return( &mbedtls_sha256_info );
elessair 0:f269e3021894 169 #endif
elessair 0:f269e3021894 170 #if defined(MBEDTLS_SHA512_C)
elessair 0:f269e3021894 171 case MBEDTLS_MD_SHA384:
elessair 0:f269e3021894 172 return( &mbedtls_sha384_info );
elessair 0:f269e3021894 173 case MBEDTLS_MD_SHA512:
elessair 0:f269e3021894 174 return( &mbedtls_sha512_info );
elessair 0:f269e3021894 175 #endif
elessair 0:f269e3021894 176 default:
elessair 0:f269e3021894 177 return( NULL );
elessair 0:f269e3021894 178 }
elessair 0:f269e3021894 179 }
elessair 0:f269e3021894 180
elessair 0:f269e3021894 181 void mbedtls_md_init( mbedtls_md_context_t *ctx )
elessair 0:f269e3021894 182 {
elessair 0:f269e3021894 183 memset( ctx, 0, sizeof( mbedtls_md_context_t ) );
elessair 0:f269e3021894 184 }
elessair 0:f269e3021894 185
elessair 0:f269e3021894 186 void mbedtls_md_free( mbedtls_md_context_t *ctx )
elessair 0:f269e3021894 187 {
elessair 0:f269e3021894 188 if( ctx == NULL || ctx->md_info == NULL )
elessair 0:f269e3021894 189 return;
elessair 0:f269e3021894 190
elessair 0:f269e3021894 191 if( ctx->md_ctx != NULL )
elessair 0:f269e3021894 192 ctx->md_info->ctx_free_func( ctx->md_ctx );
elessair 0:f269e3021894 193
elessair 0:f269e3021894 194 if( ctx->hmac_ctx != NULL )
elessair 0:f269e3021894 195 {
elessair 0:f269e3021894 196 mbedtls_zeroize( ctx->hmac_ctx, 2 * ctx->md_info->block_size );
elessair 0:f269e3021894 197 mbedtls_free( ctx->hmac_ctx );
elessair 0:f269e3021894 198 }
elessair 0:f269e3021894 199
elessair 0:f269e3021894 200 mbedtls_zeroize( ctx, sizeof( mbedtls_md_context_t ) );
elessair 0:f269e3021894 201 }
elessair 0:f269e3021894 202
elessair 0:f269e3021894 203 int mbedtls_md_clone( mbedtls_md_context_t *dst,
elessair 0:f269e3021894 204 const mbedtls_md_context_t *src )
elessair 0:f269e3021894 205 {
elessair 0:f269e3021894 206 if( dst == NULL || dst->md_info == NULL ||
elessair 0:f269e3021894 207 src == NULL || src->md_info == NULL ||
elessair 0:f269e3021894 208 dst->md_info != src->md_info )
elessair 0:f269e3021894 209 {
elessair 0:f269e3021894 210 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 211 }
elessair 0:f269e3021894 212
elessair 0:f269e3021894 213 dst->md_info->clone_func( dst->md_ctx, src->md_ctx );
elessair 0:f269e3021894 214
elessair 0:f269e3021894 215 return( 0 );
elessair 0:f269e3021894 216 }
elessair 0:f269e3021894 217
elessair 0:f269e3021894 218 #if ! defined(MBEDTLS_DEPRECATED_REMOVED)
elessair 0:f269e3021894 219 int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info )
elessair 0:f269e3021894 220 {
elessair 0:f269e3021894 221 return mbedtls_md_setup( ctx, md_info, 1 );
elessair 0:f269e3021894 222 }
elessair 0:f269e3021894 223 #endif
elessair 0:f269e3021894 224
elessair 0:f269e3021894 225 int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac )
elessair 0:f269e3021894 226 {
elessair 0:f269e3021894 227 if( md_info == NULL || ctx == NULL )
elessair 0:f269e3021894 228 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 229
elessair 0:f269e3021894 230 if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
elessair 0:f269e3021894 231 return( MBEDTLS_ERR_MD_ALLOC_FAILED );
elessair 0:f269e3021894 232
elessair 0:f269e3021894 233 if( hmac != 0 )
elessair 0:f269e3021894 234 {
elessair 0:f269e3021894 235 ctx->hmac_ctx = mbedtls_calloc( 2, md_info->block_size );
elessair 0:f269e3021894 236 if( ctx->hmac_ctx == NULL )
elessair 0:f269e3021894 237 {
elessair 0:f269e3021894 238 md_info->ctx_free_func( ctx->md_ctx );
elessair 0:f269e3021894 239 return( MBEDTLS_ERR_MD_ALLOC_FAILED );
elessair 0:f269e3021894 240 }
elessair 0:f269e3021894 241 }
elessair 0:f269e3021894 242
elessair 0:f269e3021894 243 ctx->md_info = md_info;
elessair 0:f269e3021894 244
elessair 0:f269e3021894 245 return( 0 );
elessair 0:f269e3021894 246 }
elessair 0:f269e3021894 247
elessair 0:f269e3021894 248 int mbedtls_md_starts( mbedtls_md_context_t *ctx )
elessair 0:f269e3021894 249 {
elessair 0:f269e3021894 250 if( ctx == NULL || ctx->md_info == NULL )
elessair 0:f269e3021894 251 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 252
elessair 0:f269e3021894 253 ctx->md_info->starts_func( ctx->md_ctx );
elessair 0:f269e3021894 254
elessair 0:f269e3021894 255 return( 0 );
elessair 0:f269e3021894 256 }
elessair 0:f269e3021894 257
elessair 0:f269e3021894 258 int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
elessair 0:f269e3021894 259 {
elessair 0:f269e3021894 260 if( ctx == NULL || ctx->md_info == NULL )
elessair 0:f269e3021894 261 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 262
elessair 0:f269e3021894 263 ctx->md_info->update_func( ctx->md_ctx, input, ilen );
elessair 0:f269e3021894 264
elessair 0:f269e3021894 265 return( 0 );
elessair 0:f269e3021894 266 }
elessair 0:f269e3021894 267
elessair 0:f269e3021894 268 int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
elessair 0:f269e3021894 269 {
elessair 0:f269e3021894 270 if( ctx == NULL || ctx->md_info == NULL )
elessair 0:f269e3021894 271 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 272
elessair 0:f269e3021894 273 ctx->md_info->finish_func( ctx->md_ctx, output );
elessair 0:f269e3021894 274
elessair 0:f269e3021894 275 return( 0 );
elessair 0:f269e3021894 276 }
elessair 0:f269e3021894 277
elessair 0:f269e3021894 278 int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
elessair 0:f269e3021894 279 unsigned char *output )
elessair 0:f269e3021894 280 {
elessair 0:f269e3021894 281 if( md_info == NULL )
elessair 0:f269e3021894 282 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 283
elessair 0:f269e3021894 284 md_info->digest_func( input, ilen, output );
elessair 0:f269e3021894 285
elessair 0:f269e3021894 286 return( 0 );
elessair 0:f269e3021894 287 }
elessair 0:f269e3021894 288
elessair 0:f269e3021894 289 #if defined(MBEDTLS_FS_IO)
elessair 0:f269e3021894 290 int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigned char *output )
elessair 0:f269e3021894 291 {
elessair 0:f269e3021894 292 int ret;
elessair 0:f269e3021894 293 FILE *f;
elessair 0:f269e3021894 294 size_t n;
elessair 0:f269e3021894 295 mbedtls_md_context_t ctx;
elessair 0:f269e3021894 296 unsigned char buf[1024];
elessair 0:f269e3021894 297
elessair 0:f269e3021894 298 if( md_info == NULL )
elessair 0:f269e3021894 299 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 300
elessair 0:f269e3021894 301 if( ( f = fopen( path, "rb" ) ) == NULL )
elessair 0:f269e3021894 302 return( MBEDTLS_ERR_MD_FILE_IO_ERROR );
elessair 0:f269e3021894 303
elessair 0:f269e3021894 304 mbedtls_md_init( &ctx );
elessair 0:f269e3021894 305
elessair 0:f269e3021894 306 if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
elessair 0:f269e3021894 307 goto cleanup;
elessair 0:f269e3021894 308
elessair 0:f269e3021894 309 md_info->starts_func( ctx.md_ctx );
elessair 0:f269e3021894 310
elessair 0:f269e3021894 311 while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
elessair 0:f269e3021894 312 md_info->update_func( ctx.md_ctx, buf, n );
elessair 0:f269e3021894 313
elessair 0:f269e3021894 314 if( ferror( f ) != 0 )
elessair 0:f269e3021894 315 {
elessair 0:f269e3021894 316 ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
elessair 0:f269e3021894 317 goto cleanup;
elessair 0:f269e3021894 318 }
elessair 0:f269e3021894 319
elessair 0:f269e3021894 320 md_info->finish_func( ctx.md_ctx, output );
elessair 0:f269e3021894 321
elessair 0:f269e3021894 322 cleanup:
elessair 0:f269e3021894 323 fclose( f );
elessair 0:f269e3021894 324 mbedtls_md_free( &ctx );
elessair 0:f269e3021894 325
elessair 0:f269e3021894 326 return( ret );
elessair 0:f269e3021894 327 }
elessair 0:f269e3021894 328 #endif /* MBEDTLS_FS_IO */
elessair 0:f269e3021894 329
elessair 0:f269e3021894 330 int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen )
elessair 0:f269e3021894 331 {
elessair 0:f269e3021894 332 unsigned char sum[MBEDTLS_MD_MAX_SIZE];
elessair 0:f269e3021894 333 unsigned char *ipad, *opad;
elessair 0:f269e3021894 334 size_t i;
elessair 0:f269e3021894 335
elessair 0:f269e3021894 336 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
elessair 0:f269e3021894 337 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 338
elessair 0:f269e3021894 339 if( keylen > (size_t) ctx->md_info->block_size )
elessair 0:f269e3021894 340 {
elessair 0:f269e3021894 341 ctx->md_info->starts_func( ctx->md_ctx );
elessair 0:f269e3021894 342 ctx->md_info->update_func( ctx->md_ctx, key, keylen );
elessair 0:f269e3021894 343 ctx->md_info->finish_func( ctx->md_ctx, sum );
elessair 0:f269e3021894 344
elessair 0:f269e3021894 345 keylen = ctx->md_info->size;
elessair 0:f269e3021894 346 key = sum;
elessair 0:f269e3021894 347 }
elessair 0:f269e3021894 348
elessair 0:f269e3021894 349 ipad = (unsigned char *) ctx->hmac_ctx;
elessair 0:f269e3021894 350 opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
elessair 0:f269e3021894 351
elessair 0:f269e3021894 352 memset( ipad, 0x36, ctx->md_info->block_size );
elessair 0:f269e3021894 353 memset( opad, 0x5C, ctx->md_info->block_size );
elessair 0:f269e3021894 354
elessair 0:f269e3021894 355 for( i = 0; i < keylen; i++ )
elessair 0:f269e3021894 356 {
elessair 0:f269e3021894 357 ipad[i] = (unsigned char)( ipad[i] ^ key[i] );
elessair 0:f269e3021894 358 opad[i] = (unsigned char)( opad[i] ^ key[i] );
elessair 0:f269e3021894 359 }
elessair 0:f269e3021894 360
elessair 0:f269e3021894 361 mbedtls_zeroize( sum, sizeof( sum ) );
elessair 0:f269e3021894 362
elessair 0:f269e3021894 363 ctx->md_info->starts_func( ctx->md_ctx );
elessair 0:f269e3021894 364 ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size );
elessair 0:f269e3021894 365
elessair 0:f269e3021894 366 return( 0 );
elessair 0:f269e3021894 367 }
elessair 0:f269e3021894 368
elessair 0:f269e3021894 369 int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
elessair 0:f269e3021894 370 {
elessair 0:f269e3021894 371 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
elessair 0:f269e3021894 372 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 373
elessair 0:f269e3021894 374 ctx->md_info->update_func( ctx->md_ctx, input, ilen );
elessair 0:f269e3021894 375
elessair 0:f269e3021894 376 return( 0 );
elessair 0:f269e3021894 377 }
elessair 0:f269e3021894 378
elessair 0:f269e3021894 379 int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
elessair 0:f269e3021894 380 {
elessair 0:f269e3021894 381 unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
elessair 0:f269e3021894 382 unsigned char *opad;
elessair 0:f269e3021894 383
elessair 0:f269e3021894 384 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
elessair 0:f269e3021894 385 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 386
elessair 0:f269e3021894 387 opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
elessair 0:f269e3021894 388
elessair 0:f269e3021894 389 ctx->md_info->finish_func( ctx->md_ctx, tmp );
elessair 0:f269e3021894 390 ctx->md_info->starts_func( ctx->md_ctx );
elessair 0:f269e3021894 391 ctx->md_info->update_func( ctx->md_ctx, opad, ctx->md_info->block_size );
elessair 0:f269e3021894 392 ctx->md_info->update_func( ctx->md_ctx, tmp, ctx->md_info->size );
elessair 0:f269e3021894 393 ctx->md_info->finish_func( ctx->md_ctx, output );
elessair 0:f269e3021894 394
elessair 0:f269e3021894 395 return( 0 );
elessair 0:f269e3021894 396 }
elessair 0:f269e3021894 397
elessair 0:f269e3021894 398 int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
elessair 0:f269e3021894 399 {
elessair 0:f269e3021894 400 unsigned char *ipad;
elessair 0:f269e3021894 401
elessair 0:f269e3021894 402 if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
elessair 0:f269e3021894 403 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 404
elessair 0:f269e3021894 405 ipad = (unsigned char *) ctx->hmac_ctx;
elessair 0:f269e3021894 406
elessair 0:f269e3021894 407 ctx->md_info->starts_func( ctx->md_ctx );
elessair 0:f269e3021894 408 ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size );
elessair 0:f269e3021894 409
elessair 0:f269e3021894 410 return( 0 );
elessair 0:f269e3021894 411 }
elessair 0:f269e3021894 412
elessair 0:f269e3021894 413 int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen,
elessair 0:f269e3021894 414 const unsigned char *input, size_t ilen,
elessair 0:f269e3021894 415 unsigned char *output )
elessair 0:f269e3021894 416 {
elessair 0:f269e3021894 417 mbedtls_md_context_t ctx;
elessair 0:f269e3021894 418 int ret;
elessair 0:f269e3021894 419
elessair 0:f269e3021894 420 if( md_info == NULL )
elessair 0:f269e3021894 421 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 422
elessair 0:f269e3021894 423 mbedtls_md_init( &ctx );
elessair 0:f269e3021894 424
elessair 0:f269e3021894 425 if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 )
elessair 0:f269e3021894 426 return( ret );
elessair 0:f269e3021894 427
elessair 0:f269e3021894 428 mbedtls_md_hmac_starts( &ctx, key, keylen );
elessair 0:f269e3021894 429 mbedtls_md_hmac_update( &ctx, input, ilen );
elessair 0:f269e3021894 430 mbedtls_md_hmac_finish( &ctx, output );
elessair 0:f269e3021894 431
elessair 0:f269e3021894 432 mbedtls_md_free( &ctx );
elessair 0:f269e3021894 433
elessair 0:f269e3021894 434 return( 0 );
elessair 0:f269e3021894 435 }
elessair 0:f269e3021894 436
elessair 0:f269e3021894 437 int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
elessair 0:f269e3021894 438 {
elessair 0:f269e3021894 439 if( ctx == NULL || ctx->md_info == NULL )
elessair 0:f269e3021894 440 return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
elessair 0:f269e3021894 441
elessair 0:f269e3021894 442 ctx->md_info->process_func( ctx->md_ctx, data );
elessair 0:f269e3021894 443
elessair 0:f269e3021894 444 return( 0 );
elessair 0:f269e3021894 445 }
elessair 0:f269e3021894 446
elessair 0:f269e3021894 447 unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info )
elessair 0:f269e3021894 448 {
elessair 0:f269e3021894 449 if( md_info == NULL )
elessair 0:f269e3021894 450 return( 0 );
elessair 0:f269e3021894 451
elessair 0:f269e3021894 452 return md_info->size;
elessair 0:f269e3021894 453 }
elessair 0:f269e3021894 454
elessair 0:f269e3021894 455 mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info )
elessair 0:f269e3021894 456 {
elessair 0:f269e3021894 457 if( md_info == NULL )
elessair 0:f269e3021894 458 return( MBEDTLS_MD_NONE );
elessair 0:f269e3021894 459
elessair 0:f269e3021894 460 return md_info->type;
elessair 0:f269e3021894 461 }
elessair 0:f269e3021894 462
elessair 0:f269e3021894 463 const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info )
elessair 0:f269e3021894 464 {
elessair 0:f269e3021894 465 if( md_info == NULL )
elessair 0:f269e3021894 466 return( NULL );
elessair 0:f269e3021894 467
elessair 0:f269e3021894 468 return md_info->name;
elessair 0:f269e3021894 469 }
elessair 0:f269e3021894 470
elessair 0:f269e3021894 471 #endif /* MBEDTLS_MD_C */