[398] | 1 | /**
|
---|
| 2 | * \file cmac.c
|
---|
| 3 | *
|
---|
| 4 | * \brief NIST SP800-38B compliant CMAC implementation for AES and 3DES
|
---|
| 5 | *
|
---|
| 6 | * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
|
---|
| 7 | * SPDX-License-Identifier: Apache-2.0
|
---|
| 8 | *
|
---|
| 9 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
|
---|
| 10 | * not use this file except in compliance with the License.
|
---|
| 11 | * You may obtain a copy of the License at
|
---|
| 12 | *
|
---|
| 13 | * http://www.apache.org/licenses/LICENSE-2.0
|
---|
| 14 | *
|
---|
| 15 | * Unless required by applicable law or agreed to in writing, software
|
---|
| 16 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
---|
| 17 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
---|
| 18 | * See the License for the specific language governing permissions and
|
---|
| 19 | * limitations under the License.
|
---|
| 20 | *
|
---|
| 21 | * This file is part of mbed TLS (https://tls.mbed.org)
|
---|
| 22 | */
|
---|
| 23 |
|
---|
| 24 | /*
|
---|
| 25 | * References:
|
---|
| 26 | *
|
---|
| 27 | * - NIST SP 800-38B Recommendation for Block Cipher Modes of Operation: The
|
---|
| 28 | * CMAC Mode for Authentication
|
---|
| 29 | * http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38b.pdf
|
---|
| 30 | *
|
---|
| 31 | * - RFC 4493 - The AES-CMAC Algorithm
|
---|
| 32 | * https://tools.ietf.org/html/rfc4493
|
---|
| 33 | *
|
---|
| 34 | * - RFC 4615 - The Advanced Encryption Standard-Cipher-based Message
|
---|
| 35 | * Authentication Code-Pseudo-Random Function-128 (AES-CMAC-PRF-128)
|
---|
| 36 | * Algorithm for the Internet Key Exchange Protocol (IKE)
|
---|
| 37 | * https://tools.ietf.org/html/rfc4615
|
---|
| 38 | *
|
---|
| 39 | * Additional test vectors: ISO/IEC 9797-1
|
---|
| 40 | *
|
---|
| 41 | */
|
---|
| 42 |
|
---|
| 43 | #if !defined(MBEDTLS_CONFIG_FILE)
|
---|
| 44 | #include "mbedtls/config.h"
|
---|
| 45 | #else
|
---|
| 46 | #include MBEDTLS_CONFIG_FILE
|
---|
| 47 | #endif
|
---|
| 48 |
|
---|
| 49 | #if defined(MBEDTLS_CMAC_C)
|
---|
| 50 |
|
---|
| 51 | #include "mbedtls/cmac.h"
|
---|
| 52 | #include "mbedtls/platform_util.h"
|
---|
| 53 |
|
---|
| 54 | #include <string.h>
|
---|
| 55 |
|
---|
| 56 |
|
---|
| 57 | #if defined(MBEDTLS_PLATFORM_C)
|
---|
| 58 | #include "mbedtls/platform.h"
|
---|
| 59 | #else
|
---|
| 60 | #include <stdlib.h>
|
---|
| 61 | #define mbedtls_calloc calloc
|
---|
| 62 | #define mbedtls_free free
|
---|
| 63 | #if defined(MBEDTLS_SELF_TEST)
|
---|
| 64 | #include <stdio.h>
|
---|
| 65 | #define mbedtls_printf printf
|
---|
| 66 | #endif /* MBEDTLS_SELF_TEST */
|
---|
| 67 | #endif /* MBEDTLS_PLATFORM_C */
|
---|
| 68 |
|
---|
| 69 | #if !defined(MBEDTLS_CMAC_ALT) || defined(MBEDTLS_SELF_TEST)
|
---|
| 70 |
|
---|
| 71 | /*
|
---|
| 72 | * Multiplication by u in the Galois field of GF(2^n)
|
---|
| 73 | *
|
---|
| 74 | * As explained in NIST SP 800-38B, this can be computed:
|
---|
| 75 | *
|
---|
| 76 | * If MSB(p) = 0, then p = (p << 1)
|
---|
| 77 | * If MSB(p) = 1, then p = (p << 1) ^ R_n
|
---|
| 78 | * with R_64 = 0x1B and R_128 = 0x87
|
---|
| 79 | *
|
---|
| 80 | * Input and output MUST NOT point to the same buffer
|
---|
| 81 | * Block size must be 8 bytes or 16 bytes - the block sizes for DES and AES.
|
---|
| 82 | */
|
---|
| 83 | static int cmac_multiply_by_u( unsigned char *output,
|
---|
| 84 | const unsigned char *input,
|
---|
| 85 | size_t blocksize )
|
---|
| 86 | {
|
---|
| 87 | const unsigned char R_128 = 0x87;
|
---|
| 88 | const unsigned char R_64 = 0x1B;
|
---|
| 89 | unsigned char R_n, mask;
|
---|
| 90 | unsigned char overflow = 0x00;
|
---|
| 91 | int i;
|
---|
| 92 |
|
---|
| 93 | if( blocksize == MBEDTLS_AES_BLOCK_SIZE )
|
---|
| 94 | {
|
---|
| 95 | R_n = R_128;
|
---|
| 96 | }
|
---|
| 97 | else if( blocksize == MBEDTLS_DES3_BLOCK_SIZE )
|
---|
| 98 | {
|
---|
| 99 | R_n = R_64;
|
---|
| 100 | }
|
---|
| 101 | else
|
---|
| 102 | {
|
---|
| 103 | return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
|
---|
| 104 | }
|
---|
| 105 |
|
---|
| 106 | for( i = (int)blocksize - 1; i >= 0; i-- )
|
---|
| 107 | {
|
---|
| 108 | output[i] = input[i] << 1 | overflow;
|
---|
| 109 | overflow = input[i] >> 7;
|
---|
| 110 | }
|
---|
| 111 |
|
---|
| 112 | /* mask = ( input[0] >> 7 ) ? 0xff : 0x00
|
---|
| 113 | * using bit operations to avoid branches */
|
---|
| 114 |
|
---|
| 115 | /* MSVC has a warning about unary minus on unsigned, but this is
|
---|
| 116 | * well-defined and precisely what we want to do here */
|
---|
| 117 | #if defined(_MSC_VER)
|
---|
| 118 | #pragma warning( push )
|
---|
| 119 | #pragma warning( disable : 4146 )
|
---|
| 120 | #endif
|
---|
| 121 | mask = - ( input[0] >> 7 );
|
---|
| 122 | #if defined(_MSC_VER)
|
---|
| 123 | #pragma warning( pop )
|
---|
| 124 | #endif
|
---|
| 125 |
|
---|
| 126 | output[ blocksize - 1 ] ^= R_n & mask;
|
---|
| 127 |
|
---|
| 128 | return( 0 );
|
---|
| 129 | }
|
---|
| 130 |
|
---|
| 131 | /*
|
---|
| 132 | * Generate subkeys
|
---|
| 133 | *
|
---|
| 134 | * - as specified by RFC 4493, section 2.3 Subkey Generation Algorithm
|
---|
| 135 | */
|
---|
| 136 | static int cmac_generate_subkeys( mbedtls_cipher_context_t *ctx,
|
---|
| 137 | unsigned char* K1, unsigned char* K2 )
|
---|
| 138 | {
|
---|
| 139 | int ret;
|
---|
| 140 | unsigned char L[MBEDTLS_CIPHER_BLKSIZE_MAX];
|
---|
| 141 | size_t olen, block_size;
|
---|
| 142 |
|
---|
| 143 | mbedtls_platform_zeroize( L, sizeof( L ) );
|
---|
| 144 |
|
---|
| 145 | block_size = ctx->cipher_info->block_size;
|
---|
| 146 |
|
---|
| 147 | /* Calculate Ek(0) */
|
---|
| 148 | if( ( ret = mbedtls_cipher_update( ctx, L, block_size, L, &olen ) ) != 0 )
|
---|
| 149 | goto exit;
|
---|
| 150 |
|
---|
| 151 | /*
|
---|
| 152 | * Generate K1 and K2
|
---|
| 153 | */
|
---|
| 154 | if( ( ret = cmac_multiply_by_u( K1, L , block_size ) ) != 0 )
|
---|
| 155 | goto exit;
|
---|
| 156 |
|
---|
| 157 | if( ( ret = cmac_multiply_by_u( K2, K1 , block_size ) ) != 0 )
|
---|
| 158 | goto exit;
|
---|
| 159 |
|
---|
| 160 | exit:
|
---|
| 161 | mbedtls_platform_zeroize( L, sizeof( L ) );
|
---|
| 162 |
|
---|
| 163 | return( ret );
|
---|
| 164 | }
|
---|
| 165 | #endif /* !defined(MBEDTLS_CMAC_ALT) || defined(MBEDTLS_SELF_TEST) */
|
---|
| 166 |
|
---|
| 167 | #if !defined(MBEDTLS_CMAC_ALT)
|
---|
| 168 | static void cmac_xor_block( unsigned char *output, const unsigned char *input1,
|
---|
| 169 | const unsigned char *input2,
|
---|
| 170 | const size_t block_size )
|
---|
| 171 | {
|
---|
| 172 | size_t idx;
|
---|
| 173 |
|
---|
| 174 | for( idx = 0; idx < block_size; idx++ )
|
---|
| 175 | output[ idx ] = input1[ idx ] ^ input2[ idx ];
|
---|
| 176 | }
|
---|
| 177 |
|
---|
| 178 | /*
|
---|
| 179 | * Create padded last block from (partial) last block.
|
---|
| 180 | *
|
---|
| 181 | * We can't use the padding option from the cipher layer, as it only works for
|
---|
| 182 | * CBC and we use ECB mode, and anyway we need to XOR K1 or K2 in addition.
|
---|
| 183 | */
|
---|
| 184 | static void cmac_pad( unsigned char padded_block[MBEDTLS_CIPHER_BLKSIZE_MAX],
|
---|
| 185 | size_t padded_block_len,
|
---|
| 186 | const unsigned char *last_block,
|
---|
| 187 | size_t last_block_len )
|
---|
| 188 | {
|
---|
| 189 | size_t j;
|
---|
| 190 |
|
---|
| 191 | for( j = 0; j < padded_block_len; j++ )
|
---|
| 192 | {
|
---|
| 193 | if( j < last_block_len )
|
---|
| 194 | padded_block[j] = last_block[j];
|
---|
| 195 | else if( j == last_block_len )
|
---|
| 196 | padded_block[j] = 0x80;
|
---|
| 197 | else
|
---|
| 198 | padded_block[j] = 0x00;
|
---|
| 199 | }
|
---|
| 200 | }
|
---|
| 201 |
|
---|
| 202 | int mbedtls_cipher_cmac_starts( mbedtls_cipher_context_t *ctx,
|
---|
| 203 | const unsigned char *key, size_t keybits )
|
---|
| 204 | {
|
---|
| 205 | mbedtls_cipher_type_t type;
|
---|
| 206 | mbedtls_cmac_context_t *cmac_ctx;
|
---|
| 207 | int retval;
|
---|
| 208 |
|
---|
| 209 | if( ctx == NULL || ctx->cipher_info == NULL || key == NULL )
|
---|
| 210 | return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
|
---|
| 211 |
|
---|
| 212 | if( ( retval = mbedtls_cipher_setkey( ctx, key, (int)keybits,
|
---|
| 213 | MBEDTLS_ENCRYPT ) ) != 0 )
|
---|
| 214 | return( retval );
|
---|
| 215 |
|
---|
| 216 | type = ctx->cipher_info->type;
|
---|
| 217 |
|
---|
| 218 | switch( type )
|
---|
| 219 | {
|
---|
| 220 | case MBEDTLS_CIPHER_AES_128_ECB:
|
---|
| 221 | case MBEDTLS_CIPHER_AES_192_ECB:
|
---|
| 222 | case MBEDTLS_CIPHER_AES_256_ECB:
|
---|
| 223 | case MBEDTLS_CIPHER_DES_EDE3_ECB:
|
---|
| 224 | break;
|
---|
| 225 | default:
|
---|
| 226 | return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
|
---|
| 227 | }
|
---|
| 228 |
|
---|
| 229 | /* Allocated and initialise in the cipher context memory for the CMAC
|
---|
| 230 | * context */
|
---|
| 231 | cmac_ctx = mbedtls_calloc( 1, sizeof( mbedtls_cmac_context_t ) );
|
---|
| 232 | if( cmac_ctx == NULL )
|
---|
| 233 | return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED );
|
---|
| 234 |
|
---|
| 235 | ctx->cmac_ctx = cmac_ctx;
|
---|
| 236 |
|
---|
| 237 | mbedtls_platform_zeroize( cmac_ctx->state, sizeof( cmac_ctx->state ) );
|
---|
| 238 |
|
---|
| 239 | return 0;
|
---|
| 240 | }
|
---|
| 241 |
|
---|
| 242 | int mbedtls_cipher_cmac_update( mbedtls_cipher_context_t *ctx,
|
---|
| 243 | const unsigned char *input, size_t ilen )
|
---|
| 244 | {
|
---|
| 245 | mbedtls_cmac_context_t* cmac_ctx;
|
---|
| 246 | unsigned char *state;
|
---|
| 247 | int ret = 0;
|
---|
| 248 | size_t n, j, olen, block_size;
|
---|
| 249 |
|
---|
| 250 | if( ctx == NULL || ctx->cipher_info == NULL || input == NULL ||
|
---|
| 251 | ctx->cmac_ctx == NULL )
|
---|
| 252 | return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
|
---|
| 253 |
|
---|
| 254 | cmac_ctx = ctx->cmac_ctx;
|
---|
| 255 | block_size = ctx->cipher_info->block_size;
|
---|
| 256 | state = ctx->cmac_ctx->state;
|
---|
| 257 |
|
---|
| 258 | /* Is there data still to process from the last call, that's greater in
|
---|
| 259 | * size than a block? */
|
---|
| 260 | if( cmac_ctx->unprocessed_len > 0 &&
|
---|
| 261 | ilen > block_size - cmac_ctx->unprocessed_len )
|
---|
| 262 | {
|
---|
| 263 | memcpy( &cmac_ctx->unprocessed_block[cmac_ctx->unprocessed_len],
|
---|
| 264 | input,
|
---|
| 265 | block_size - cmac_ctx->unprocessed_len );
|
---|
| 266 |
|
---|
| 267 | cmac_xor_block( state, cmac_ctx->unprocessed_block, state, block_size );
|
---|
| 268 |
|
---|
| 269 | if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state,
|
---|
| 270 | &olen ) ) != 0 )
|
---|
| 271 | {
|
---|
| 272 | goto exit;
|
---|
| 273 | }
|
---|
| 274 |
|
---|
| 275 | input += block_size - cmac_ctx->unprocessed_len;
|
---|
| 276 | ilen -= block_size - cmac_ctx->unprocessed_len;
|
---|
| 277 | cmac_ctx->unprocessed_len = 0;
|
---|
| 278 | }
|
---|
| 279 |
|
---|
| 280 | /* n is the number of blocks including any final partial block */
|
---|
| 281 | n = ( ilen + block_size - 1 ) / block_size;
|
---|
| 282 |
|
---|
| 283 | /* Iterate across the input data in block sized chunks, excluding any
|
---|
| 284 | * final partial or complete block */
|
---|
| 285 | for( j = 1; j < n; j++ )
|
---|
| 286 | {
|
---|
| 287 | cmac_xor_block( state, input, state, block_size );
|
---|
| 288 |
|
---|
| 289 | if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state,
|
---|
| 290 | &olen ) ) != 0 )
|
---|
| 291 | goto exit;
|
---|
| 292 |
|
---|
| 293 | ilen -= block_size;
|
---|
| 294 | input += block_size;
|
---|
| 295 | }
|
---|
| 296 |
|
---|
| 297 | /* If there is data left over that wasn't aligned to a block */
|
---|
| 298 | if( ilen > 0 )
|
---|
| 299 | {
|
---|
| 300 | memcpy( &cmac_ctx->unprocessed_block[cmac_ctx->unprocessed_len],
|
---|
| 301 | input,
|
---|
| 302 | ilen );
|
---|
| 303 | cmac_ctx->unprocessed_len += ilen;
|
---|
| 304 | }
|
---|
| 305 |
|
---|
| 306 | exit:
|
---|
| 307 | return( ret );
|
---|
| 308 | }
|
---|
| 309 |
|
---|
| 310 | int mbedtls_cipher_cmac_finish( mbedtls_cipher_context_t *ctx,
|
---|
| 311 | unsigned char *output )
|
---|
| 312 | {
|
---|
| 313 | mbedtls_cmac_context_t* cmac_ctx;
|
---|
| 314 | unsigned char *state, *last_block;
|
---|
| 315 | unsigned char K1[MBEDTLS_CIPHER_BLKSIZE_MAX];
|
---|
| 316 | unsigned char K2[MBEDTLS_CIPHER_BLKSIZE_MAX];
|
---|
| 317 | unsigned char M_last[MBEDTLS_CIPHER_BLKSIZE_MAX];
|
---|
| 318 | int ret;
|
---|
| 319 | size_t olen, block_size;
|
---|
| 320 |
|
---|
| 321 | if( ctx == NULL || ctx->cipher_info == NULL || ctx->cmac_ctx == NULL ||
|
---|
| 322 | output == NULL )
|
---|
| 323 | return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
|
---|
| 324 |
|
---|
| 325 | cmac_ctx = ctx->cmac_ctx;
|
---|
| 326 | block_size = ctx->cipher_info->block_size;
|
---|
| 327 | state = cmac_ctx->state;
|
---|
| 328 |
|
---|
| 329 | mbedtls_platform_zeroize( K1, sizeof( K1 ) );
|
---|
| 330 | mbedtls_platform_zeroize( K2, sizeof( K2 ) );
|
---|
| 331 | cmac_generate_subkeys( ctx, K1, K2 );
|
---|
| 332 |
|
---|
| 333 | last_block = cmac_ctx->unprocessed_block;
|
---|
| 334 |
|
---|
| 335 | /* Calculate last block */
|
---|
| 336 | if( cmac_ctx->unprocessed_len < block_size )
|
---|
| 337 | {
|
---|
| 338 | cmac_pad( M_last, block_size, last_block, cmac_ctx->unprocessed_len );
|
---|
| 339 | cmac_xor_block( M_last, M_last, K2, block_size );
|
---|
| 340 | }
|
---|
| 341 | else
|
---|
| 342 | {
|
---|
| 343 | /* Last block is complete block */
|
---|
| 344 | cmac_xor_block( M_last, last_block, K1, block_size );
|
---|
| 345 | }
|
---|
| 346 |
|
---|
| 347 |
|
---|
| 348 | cmac_xor_block( state, M_last, state, block_size );
|
---|
| 349 | if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state,
|
---|
| 350 | &olen ) ) != 0 )
|
---|
| 351 | {
|
---|
| 352 | goto exit;
|
---|
| 353 | }
|
---|
| 354 |
|
---|
| 355 | memcpy( output, state, block_size );
|
---|
| 356 |
|
---|
| 357 | exit:
|
---|
| 358 | /* Wipe the generated keys on the stack, and any other transients to avoid
|
---|
| 359 | * side channel leakage */
|
---|
| 360 | mbedtls_platform_zeroize( K1, sizeof( K1 ) );
|
---|
| 361 | mbedtls_platform_zeroize( K2, sizeof( K2 ) );
|
---|
| 362 |
|
---|
| 363 | cmac_ctx->unprocessed_len = 0;
|
---|
| 364 | mbedtls_platform_zeroize( cmac_ctx->unprocessed_block,
|
---|
| 365 | sizeof( cmac_ctx->unprocessed_block ) );
|
---|
| 366 |
|
---|
| 367 | mbedtls_platform_zeroize( state, MBEDTLS_CIPHER_BLKSIZE_MAX );
|
---|
| 368 | return( ret );
|
---|
| 369 | }
|
---|
| 370 |
|
---|
| 371 | int mbedtls_cipher_cmac_reset( mbedtls_cipher_context_t *ctx )
|
---|
| 372 | {
|
---|
| 373 | mbedtls_cmac_context_t* cmac_ctx;
|
---|
| 374 |
|
---|
| 375 | if( ctx == NULL || ctx->cipher_info == NULL || ctx->cmac_ctx == NULL )
|
---|
| 376 | return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
|
---|
| 377 |
|
---|
| 378 | cmac_ctx = ctx->cmac_ctx;
|
---|
| 379 |
|
---|
| 380 | /* Reset the internal state */
|
---|
| 381 | cmac_ctx->unprocessed_len = 0;
|
---|
| 382 | mbedtls_platform_zeroize( cmac_ctx->unprocessed_block,
|
---|
| 383 | sizeof( cmac_ctx->unprocessed_block ) );
|
---|
| 384 | mbedtls_platform_zeroize( cmac_ctx->state,
|
---|
| 385 | sizeof( cmac_ctx->state ) );
|
---|
| 386 |
|
---|
| 387 | return( 0 );
|
---|
| 388 | }
|
---|
| 389 |
|
---|
| 390 | int mbedtls_cipher_cmac( const mbedtls_cipher_info_t *cipher_info,
|
---|
| 391 | const unsigned char *key, size_t keylen,
|
---|
| 392 | const unsigned char *input, size_t ilen,
|
---|
| 393 | unsigned char *output )
|
---|
| 394 | {
|
---|
| 395 | mbedtls_cipher_context_t ctx;
|
---|
| 396 | int ret;
|
---|
| 397 |
|
---|
| 398 | if( cipher_info == NULL || key == NULL || input == NULL || output == NULL )
|
---|
| 399 | return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
|
---|
| 400 |
|
---|
| 401 | mbedtls_cipher_init( &ctx );
|
---|
| 402 |
|
---|
| 403 | if( ( ret = mbedtls_cipher_setup( &ctx, cipher_info ) ) != 0 )
|
---|
| 404 | goto exit;
|
---|
| 405 |
|
---|
| 406 | ret = mbedtls_cipher_cmac_starts( &ctx, key, keylen );
|
---|
| 407 | if( ret != 0 )
|
---|
| 408 | goto exit;
|
---|
| 409 |
|
---|
| 410 | ret = mbedtls_cipher_cmac_update( &ctx, input, ilen );
|
---|
| 411 | if( ret != 0 )
|
---|
| 412 | goto exit;
|
---|
| 413 |
|
---|
| 414 | ret = mbedtls_cipher_cmac_finish( &ctx, output );
|
---|
| 415 |
|
---|
| 416 | exit:
|
---|
| 417 | mbedtls_cipher_free( &ctx );
|
---|
| 418 |
|
---|
| 419 | return( ret );
|
---|
| 420 | }
|
---|
| 421 |
|
---|
| 422 | #if defined(MBEDTLS_AES_C)
|
---|
| 423 | /*
|
---|
| 424 | * Implementation of AES-CMAC-PRF-128 defined in RFC 4615
|
---|
| 425 | */
|
---|
| 426 | int mbedtls_aes_cmac_prf_128( const unsigned char *key, size_t key_length,
|
---|
| 427 | const unsigned char *input, size_t in_len,
|
---|
| 428 | unsigned char *output )
|
---|
| 429 | {
|
---|
| 430 | int ret;
|
---|
| 431 | const mbedtls_cipher_info_t *cipher_info;
|
---|
| 432 | unsigned char zero_key[MBEDTLS_AES_BLOCK_SIZE];
|
---|
| 433 | unsigned char int_key[MBEDTLS_AES_BLOCK_SIZE];
|
---|
| 434 |
|
---|
| 435 | if( key == NULL || input == NULL || output == NULL )
|
---|
| 436 | return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
|
---|
| 437 |
|
---|
| 438 | cipher_info = mbedtls_cipher_info_from_type( MBEDTLS_CIPHER_AES_128_ECB );
|
---|
| 439 | if( cipher_info == NULL )
|
---|
| 440 | {
|
---|
| 441 | /* Failing at this point must be due to a build issue */
|
---|
| 442 | ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
|
---|
| 443 | goto exit;
|
---|
| 444 | }
|
---|
| 445 |
|
---|
| 446 | if( key_length == MBEDTLS_AES_BLOCK_SIZE )
|
---|
| 447 | {
|
---|
| 448 | /* Use key as is */
|
---|
| 449 | memcpy( int_key, key, MBEDTLS_AES_BLOCK_SIZE );
|
---|
| 450 | }
|
---|
| 451 | else
|
---|
| 452 | {
|
---|
| 453 | memset( zero_key, 0, MBEDTLS_AES_BLOCK_SIZE );
|
---|
| 454 |
|
---|
| 455 | ret = mbedtls_cipher_cmac( cipher_info, zero_key, 128, key,
|
---|
| 456 | key_length, int_key );
|
---|
| 457 | if( ret != 0 )
|
---|
| 458 | goto exit;
|
---|
| 459 | }
|
---|
| 460 |
|
---|
| 461 | ret = mbedtls_cipher_cmac( cipher_info, int_key, 128, input, in_len,
|
---|
| 462 | output );
|
---|
| 463 |
|
---|
| 464 | exit:
|
---|
| 465 | mbedtls_platform_zeroize( int_key, sizeof( int_key ) );
|
---|
| 466 |
|
---|
| 467 | return( ret );
|
---|
| 468 | }
|
---|
| 469 | #endif /* MBEDTLS_AES_C */
|
---|
| 470 |
|
---|
| 471 | #endif /* !MBEDTLS_CMAC_ALT */
|
---|
| 472 |
|
---|
| 473 | #if defined(MBEDTLS_SELF_TEST)
|
---|
| 474 | /*
|
---|
| 475 | * CMAC test data for SP800-38B
|
---|
| 476 | * http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/AES_CMAC.pdf
|
---|
| 477 | * http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/TDES_CMAC.pdf
|
---|
| 478 | *
|
---|
| 479 | * AES-CMAC-PRF-128 test data from RFC 4615
|
---|
| 480 | * https://tools.ietf.org/html/rfc4615#page-4
|
---|
| 481 | */
|
---|
| 482 |
|
---|
| 483 | #define NB_CMAC_TESTS_PER_KEY 4
|
---|
| 484 | #define NB_PRF_TESTS 3
|
---|
| 485 |
|
---|
| 486 | #if defined(MBEDTLS_AES_C) || defined(MBEDTLS_DES_C)
|
---|
| 487 | /* All CMAC test inputs are truncated from the same 64 byte buffer. */
|
---|
| 488 | static const unsigned char test_message[] = {
|
---|
| 489 | /* PT */
|
---|
| 490 | 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
|
---|
| 491 | 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
|
---|
| 492 | 0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c,
|
---|
| 493 | 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
|
---|
| 494 | 0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
|
---|
| 495 | 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
|
---|
| 496 | 0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17,
|
---|
| 497 | 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10
|
---|
| 498 | };
|
---|
| 499 | #endif /* MBEDTLS_AES_C || MBEDTLS_DES_C */
|
---|
| 500 |
|
---|
| 501 | #if defined(MBEDTLS_AES_C)
|
---|
| 502 | /* Truncation point of message for AES CMAC tests */
|
---|
| 503 | static const unsigned int aes_message_lengths[NB_CMAC_TESTS_PER_KEY] = {
|
---|
| 504 | /* Mlen */
|
---|
| 505 | 0,
|
---|
| 506 | 16,
|
---|
| 507 | 20,
|
---|
| 508 | 64
|
---|
| 509 | };
|
---|
| 510 |
|
---|
| 511 | /* CMAC-AES128 Test Data */
|
---|
| 512 | static const unsigned char aes_128_key[16] = {
|
---|
| 513 | 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6,
|
---|
| 514 | 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c
|
---|
| 515 | };
|
---|
| 516 | static const unsigned char aes_128_subkeys[2][MBEDTLS_AES_BLOCK_SIZE] = {
|
---|
| 517 | {
|
---|
| 518 | /* K1 */
|
---|
| 519 | 0xfb, 0xee, 0xd6, 0x18, 0x35, 0x71, 0x33, 0x66,
|
---|
| 520 | 0x7c, 0x85, 0xe0, 0x8f, 0x72, 0x36, 0xa8, 0xde
|
---|
| 521 | },
|
---|
| 522 | {
|
---|
| 523 | /* K2 */
|
---|
| 524 | 0xf7, 0xdd, 0xac, 0x30, 0x6a, 0xe2, 0x66, 0xcc,
|
---|
| 525 | 0xf9, 0x0b, 0xc1, 0x1e, 0xe4, 0x6d, 0x51, 0x3b
|
---|
| 526 | }
|
---|
| 527 | };
|
---|
| 528 | static const unsigned char aes_128_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_AES_BLOCK_SIZE] = {
|
---|
| 529 | {
|
---|
| 530 | /* Example #1 */
|
---|
| 531 | 0xbb, 0x1d, 0x69, 0x29, 0xe9, 0x59, 0x37, 0x28,
|
---|
| 532 | 0x7f, 0xa3, 0x7d, 0x12, 0x9b, 0x75, 0x67, 0x46
|
---|
| 533 | },
|
---|
| 534 | {
|
---|
| 535 | /* Example #2 */
|
---|
| 536 | 0x07, 0x0a, 0x16, 0xb4, 0x6b, 0x4d, 0x41, 0x44,
|
---|
| 537 | 0xf7, 0x9b, 0xdd, 0x9d, 0xd0, 0x4a, 0x28, 0x7c
|
---|
| 538 | },
|
---|
| 539 | {
|
---|
| 540 | /* Example #3 */
|
---|
| 541 | 0x7d, 0x85, 0x44, 0x9e, 0xa6, 0xea, 0x19, 0xc8,
|
---|
| 542 | 0x23, 0xa7, 0xbf, 0x78, 0x83, 0x7d, 0xfa, 0xde
|
---|
| 543 | },
|
---|
| 544 | {
|
---|
| 545 | /* Example #4 */
|
---|
| 546 | 0x51, 0xf0, 0xbe, 0xbf, 0x7e, 0x3b, 0x9d, 0x92,
|
---|
| 547 | 0xfc, 0x49, 0x74, 0x17, 0x79, 0x36, 0x3c, 0xfe
|
---|
| 548 | }
|
---|
| 549 | };
|
---|
| 550 |
|
---|
| 551 | /* CMAC-AES192 Test Data */
|
---|
| 552 | static const unsigned char aes_192_key[24] = {
|
---|
| 553 | 0x8e, 0x73, 0xb0, 0xf7, 0xda, 0x0e, 0x64, 0x52,
|
---|
| 554 | 0xc8, 0x10, 0xf3, 0x2b, 0x80, 0x90, 0x79, 0xe5,
|
---|
| 555 | 0x62, 0xf8, 0xea, 0xd2, 0x52, 0x2c, 0x6b, 0x7b
|
---|
| 556 | };
|
---|
| 557 | static const unsigned char aes_192_subkeys[2][MBEDTLS_AES_BLOCK_SIZE] = {
|
---|
| 558 | {
|
---|
| 559 | /* K1 */
|
---|
| 560 | 0x44, 0x8a, 0x5b, 0x1c, 0x93, 0x51, 0x4b, 0x27,
|
---|
| 561 | 0x3e, 0xe6, 0x43, 0x9d, 0xd4, 0xda, 0xa2, 0x96
|
---|
| 562 | },
|
---|
| 563 | {
|
---|
| 564 | /* K2 */
|
---|
| 565 | 0x89, 0x14, 0xb6, 0x39, 0x26, 0xa2, 0x96, 0x4e,
|
---|
| 566 | 0x7d, 0xcc, 0x87, 0x3b, 0xa9, 0xb5, 0x45, 0x2c
|
---|
| 567 | }
|
---|
| 568 | };
|
---|
| 569 | static const unsigned char aes_192_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_AES_BLOCK_SIZE] = {
|
---|
| 570 | {
|
---|
| 571 | /* Example #1 */
|
---|
| 572 | 0xd1, 0x7d, 0xdf, 0x46, 0xad, 0xaa, 0xcd, 0xe5,
|
---|
| 573 | 0x31, 0xca, 0xc4, 0x83, 0xde, 0x7a, 0x93, 0x67
|
---|
| 574 | },
|
---|
| 575 | {
|
---|
| 576 | /* Example #2 */
|
---|
| 577 | 0x9e, 0x99, 0xa7, 0xbf, 0x31, 0xe7, 0x10, 0x90,
|
---|
| 578 | 0x06, 0x62, 0xf6, 0x5e, 0x61, 0x7c, 0x51, 0x84
|
---|
| 579 | },
|
---|
| 580 | {
|
---|
| 581 | /* Example #3 */
|
---|
| 582 | 0x3d, 0x75, 0xc1, 0x94, 0xed, 0x96, 0x07, 0x04,
|
---|
| 583 | 0x44, 0xa9, 0xfa, 0x7e, 0xc7, 0x40, 0xec, 0xf8
|
---|
| 584 | },
|
---|
| 585 | {
|
---|
| 586 | /* Example #4 */
|
---|
| 587 | 0xa1, 0xd5, 0xdf, 0x0e, 0xed, 0x79, 0x0f, 0x79,
|
---|
| 588 | 0x4d, 0x77, 0x58, 0x96, 0x59, 0xf3, 0x9a, 0x11
|
---|
| 589 | }
|
---|
| 590 | };
|
---|
| 591 |
|
---|
| 592 | /* CMAC-AES256 Test Data */
|
---|
| 593 | static const unsigned char aes_256_key[32] = {
|
---|
| 594 | 0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe,
|
---|
| 595 | 0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81,
|
---|
| 596 | 0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7,
|
---|
| 597 | 0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4
|
---|
| 598 | };
|
---|
| 599 | static const unsigned char aes_256_subkeys[2][MBEDTLS_AES_BLOCK_SIZE] = {
|
---|
| 600 | {
|
---|
| 601 | /* K1 */
|
---|
| 602 | 0xca, 0xd1, 0xed, 0x03, 0x29, 0x9e, 0xed, 0xac,
|
---|
| 603 | 0x2e, 0x9a, 0x99, 0x80, 0x86, 0x21, 0x50, 0x2f
|
---|
| 604 | },
|
---|
| 605 | {
|
---|
| 606 | /* K2 */
|
---|
| 607 | 0x95, 0xa3, 0xda, 0x06, 0x53, 0x3d, 0xdb, 0x58,
|
---|
| 608 | 0x5d, 0x35, 0x33, 0x01, 0x0c, 0x42, 0xa0, 0xd9
|
---|
| 609 | }
|
---|
| 610 | };
|
---|
| 611 | static const unsigned char aes_256_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_AES_BLOCK_SIZE] = {
|
---|
| 612 | {
|
---|
| 613 | /* Example #1 */
|
---|
| 614 | 0x02, 0x89, 0x62, 0xf6, 0x1b, 0x7b, 0xf8, 0x9e,
|
---|
| 615 | 0xfc, 0x6b, 0x55, 0x1f, 0x46, 0x67, 0xd9, 0x83
|
---|
| 616 | },
|
---|
| 617 | {
|
---|
| 618 | /* Example #2 */
|
---|
| 619 | 0x28, 0xa7, 0x02, 0x3f, 0x45, 0x2e, 0x8f, 0x82,
|
---|
| 620 | 0xbd, 0x4b, 0xf2, 0x8d, 0x8c, 0x37, 0xc3, 0x5c
|
---|
| 621 | },
|
---|
| 622 | {
|
---|
| 623 | /* Example #3 */
|
---|
| 624 | 0x15, 0x67, 0x27, 0xdc, 0x08, 0x78, 0x94, 0x4a,
|
---|
| 625 | 0x02, 0x3c, 0x1f, 0xe0, 0x3b, 0xad, 0x6d, 0x93
|
---|
| 626 | },
|
---|
| 627 | {
|
---|
| 628 | /* Example #4 */
|
---|
| 629 | 0xe1, 0x99, 0x21, 0x90, 0x54, 0x9f, 0x6e, 0xd5,
|
---|
| 630 | 0x69, 0x6a, 0x2c, 0x05, 0x6c, 0x31, 0x54, 0x10
|
---|
| 631 | }
|
---|
| 632 | };
|
---|
| 633 | #endif /* MBEDTLS_AES_C */
|
---|
| 634 |
|
---|
| 635 | #if defined(MBEDTLS_DES_C)
|
---|
| 636 | /* Truncation point of message for 3DES CMAC tests */
|
---|
| 637 | static const unsigned int des3_message_lengths[NB_CMAC_TESTS_PER_KEY] = {
|
---|
| 638 | 0,
|
---|
| 639 | 16,
|
---|
| 640 | 20,
|
---|
| 641 | 32
|
---|
| 642 | };
|
---|
| 643 |
|
---|
| 644 | /* CMAC-TDES (Generation) - 2 Key Test Data */
|
---|
| 645 | static const unsigned char des3_2key_key[24] = {
|
---|
| 646 | /* Key1 */
|
---|
| 647 | 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
|
---|
| 648 | /* Key2 */
|
---|
| 649 | 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xEF, 0x01,
|
---|
| 650 | /* Key3 */
|
---|
| 651 | 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef
|
---|
| 652 | };
|
---|
| 653 | static const unsigned char des3_2key_subkeys[2][8] = {
|
---|
| 654 | {
|
---|
| 655 | /* K1 */
|
---|
| 656 | 0x0d, 0xd2, 0xcb, 0x7a, 0x3d, 0x88, 0x88, 0xd9
|
---|
| 657 | },
|
---|
| 658 | {
|
---|
| 659 | /* K2 */
|
---|
| 660 | 0x1b, 0xa5, 0x96, 0xf4, 0x7b, 0x11, 0x11, 0xb2
|
---|
| 661 | }
|
---|
| 662 | };
|
---|
| 663 | static const unsigned char des3_2key_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_DES3_BLOCK_SIZE] = {
|
---|
| 664 | {
|
---|
| 665 | /* Sample #1 */
|
---|
| 666 | 0x79, 0xce, 0x52, 0xa7, 0xf7, 0x86, 0xa9, 0x60
|
---|
| 667 | },
|
---|
| 668 | {
|
---|
| 669 | /* Sample #2 */
|
---|
| 670 | 0xcc, 0x18, 0xa0, 0xb7, 0x9a, 0xf2, 0x41, 0x3b
|
---|
| 671 | },
|
---|
| 672 | {
|
---|
| 673 | /* Sample #3 */
|
---|
| 674 | 0xc0, 0x6d, 0x37, 0x7e, 0xcd, 0x10, 0x19, 0x69
|
---|
| 675 | },
|
---|
| 676 | {
|
---|
| 677 | /* Sample #4 */
|
---|
| 678 | 0x9c, 0xd3, 0x35, 0x80, 0xf9, 0xb6, 0x4d, 0xfb
|
---|
| 679 | }
|
---|
| 680 | };
|
---|
| 681 |
|
---|
| 682 | /* CMAC-TDES (Generation) - 3 Key Test Data */
|
---|
| 683 | static const unsigned char des3_3key_key[24] = {
|
---|
| 684 | /* Key1 */
|
---|
| 685 | 0x01, 0x23, 0x45, 0x67, 0x89, 0xaa, 0xcd, 0xef,
|
---|
| 686 | /* Key2 */
|
---|
| 687 | 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01,
|
---|
| 688 | /* Key3 */
|
---|
| 689 | 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23
|
---|
| 690 | };
|
---|
| 691 | static const unsigned char des3_3key_subkeys[2][8] = {
|
---|
| 692 | {
|
---|
| 693 | /* K1 */
|
---|
| 694 | 0x9d, 0x74, 0xe7, 0x39, 0x33, 0x17, 0x96, 0xc0
|
---|
| 695 | },
|
---|
| 696 | {
|
---|
| 697 | /* K2 */
|
---|
| 698 | 0x3a, 0xe9, 0xce, 0x72, 0x66, 0x2f, 0x2d, 0x9b
|
---|
| 699 | }
|
---|
| 700 | };
|
---|
| 701 | static const unsigned char des3_3key_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_DES3_BLOCK_SIZE] = {
|
---|
| 702 | {
|
---|
| 703 | /* Sample #1 */
|
---|
| 704 | 0x7d, 0xb0, 0xd3, 0x7d, 0xf9, 0x36, 0xc5, 0x50
|
---|
| 705 | },
|
---|
| 706 | {
|
---|
| 707 | /* Sample #2 */
|
---|
| 708 | 0x30, 0x23, 0x9c, 0xf1, 0xf5, 0x2e, 0x66, 0x09
|
---|
| 709 | },
|
---|
| 710 | {
|
---|
| 711 | /* Sample #3 */
|
---|
| 712 | 0x6c, 0x9f, 0x3e, 0xe4, 0x92, 0x3f, 0x6b, 0xe2
|
---|
| 713 | },
|
---|
| 714 | {
|
---|
| 715 | /* Sample #4 */
|
---|
| 716 | 0x99, 0x42, 0x9b, 0xd0, 0xbF, 0x79, 0x04, 0xe5
|
---|
| 717 | }
|
---|
| 718 | };
|
---|
| 719 |
|
---|
| 720 | #endif /* MBEDTLS_DES_C */
|
---|
| 721 |
|
---|
| 722 | #if defined(MBEDTLS_AES_C)
|
---|
| 723 | /* AES AES-CMAC-PRF-128 Test Data */
|
---|
| 724 | static const unsigned char PRFK[] = {
|
---|
| 725 | /* Key */
|
---|
| 726 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
|
---|
| 727 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
|
---|
| 728 | 0xed, 0xcb
|
---|
| 729 | };
|
---|
| 730 |
|
---|
| 731 | /* Sizes in bytes */
|
---|
| 732 | static const size_t PRFKlen[NB_PRF_TESTS] = {
|
---|
| 733 | 18,
|
---|
| 734 | 16,
|
---|
| 735 | 10
|
---|
| 736 | };
|
---|
| 737 |
|
---|
| 738 | /* Message */
|
---|
| 739 | static const unsigned char PRFM[] = {
|
---|
| 740 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
|
---|
| 741 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
|
---|
| 742 | 0x10, 0x11, 0x12, 0x13
|
---|
| 743 | };
|
---|
| 744 |
|
---|
| 745 | static const unsigned char PRFT[NB_PRF_TESTS][16] = {
|
---|
| 746 | {
|
---|
| 747 | 0x84, 0xa3, 0x48, 0xa4, 0xa4, 0x5d, 0x23, 0x5b,
|
---|
| 748 | 0xab, 0xff, 0xfc, 0x0d, 0x2b, 0x4d, 0xa0, 0x9a
|
---|
| 749 | },
|
---|
| 750 | {
|
---|
| 751 | 0x98, 0x0a, 0xe8, 0x7b, 0x5f, 0x4c, 0x9c, 0x52,
|
---|
| 752 | 0x14, 0xf5, 0xb6, 0xa8, 0x45, 0x5e, 0x4c, 0x2d
|
---|
| 753 | },
|
---|
| 754 | {
|
---|
| 755 | 0x29, 0x0d, 0x9e, 0x11, 0x2e, 0xdb, 0x09, 0xee,
|
---|
| 756 | 0x14, 0x1f, 0xcf, 0x64, 0xc0, 0xb7, 0x2f, 0x3d
|
---|
| 757 | }
|
---|
| 758 | };
|
---|
| 759 | #endif /* MBEDTLS_AES_C */
|
---|
| 760 |
|
---|
| 761 | static int cmac_test_subkeys( int verbose,
|
---|
| 762 | const char* testname,
|
---|
| 763 | const unsigned char* key,
|
---|
| 764 | int keybits,
|
---|
| 765 | const unsigned char* subkeys,
|
---|
| 766 | mbedtls_cipher_type_t cipher_type,
|
---|
| 767 | int block_size,
|
---|
| 768 | int num_tests )
|
---|
| 769 | {
|
---|
| 770 | int i, ret = 0;
|
---|
| 771 | mbedtls_cipher_context_t ctx;
|
---|
| 772 | const mbedtls_cipher_info_t *cipher_info;
|
---|
| 773 | unsigned char K1[MBEDTLS_CIPHER_BLKSIZE_MAX];
|
---|
| 774 | unsigned char K2[MBEDTLS_CIPHER_BLKSIZE_MAX];
|
---|
| 775 |
|
---|
| 776 | cipher_info = mbedtls_cipher_info_from_type( cipher_type );
|
---|
| 777 | if( cipher_info == NULL )
|
---|
| 778 | {
|
---|
| 779 | /* Failing at this point must be due to a build issue */
|
---|
| 780 | return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
|
---|
| 781 | }
|
---|
| 782 |
|
---|
| 783 | for( i = 0; i < num_tests; i++ )
|
---|
| 784 | {
|
---|
| 785 | if( verbose != 0 )
|
---|
| 786 | mbedtls_printf( " %s CMAC subkey #%u: ", testname, i + 1 );
|
---|
| 787 |
|
---|
| 788 | mbedtls_cipher_init( &ctx );
|
---|
| 789 |
|
---|
| 790 | if( ( ret = mbedtls_cipher_setup( &ctx, cipher_info ) ) != 0 )
|
---|
| 791 | {
|
---|
| 792 | if( verbose != 0 )
|
---|
| 793 | mbedtls_printf( "test execution failed\n" );
|
---|
| 794 |
|
---|
| 795 | goto cleanup;
|
---|
| 796 | }
|
---|
| 797 |
|
---|
| 798 | if( ( ret = mbedtls_cipher_setkey( &ctx, key, keybits,
|
---|
| 799 | MBEDTLS_ENCRYPT ) ) != 0 )
|
---|
| 800 | {
|
---|
| 801 | if( verbose != 0 )
|
---|
| 802 | mbedtls_printf( "test execution failed\n" );
|
---|
| 803 |
|
---|
| 804 | goto cleanup;
|
---|
| 805 | }
|
---|
| 806 |
|
---|
| 807 | ret = cmac_generate_subkeys( &ctx, K1, K2 );
|
---|
| 808 | if( ret != 0 )
|
---|
| 809 | {
|
---|
| 810 | if( verbose != 0 )
|
---|
| 811 | mbedtls_printf( "failed\n" );
|
---|
| 812 |
|
---|
| 813 | goto cleanup;
|
---|
| 814 | }
|
---|
| 815 |
|
---|
| 816 | if( ( ret = memcmp( K1, subkeys, block_size ) ) != 0 ||
|
---|
| 817 | ( ret = memcmp( K2, &subkeys[block_size], block_size ) ) != 0 )
|
---|
| 818 | {
|
---|
| 819 | if( verbose != 0 )
|
---|
| 820 | mbedtls_printf( "failed\n" );
|
---|
| 821 |
|
---|
| 822 | goto cleanup;
|
---|
| 823 | }
|
---|
| 824 |
|
---|
| 825 | if( verbose != 0 )
|
---|
| 826 | mbedtls_printf( "passed\n" );
|
---|
| 827 |
|
---|
| 828 | mbedtls_cipher_free( &ctx );
|
---|
| 829 | }
|
---|
| 830 |
|
---|
| 831 | ret = 0;
|
---|
| 832 | goto exit;
|
---|
| 833 |
|
---|
| 834 | cleanup:
|
---|
| 835 | mbedtls_cipher_free( &ctx );
|
---|
| 836 |
|
---|
| 837 | exit:
|
---|
| 838 | return( ret );
|
---|
| 839 | }
|
---|
| 840 |
|
---|
| 841 | static int cmac_test_wth_cipher( int verbose,
|
---|
| 842 | const char* testname,
|
---|
| 843 | const unsigned char* key,
|
---|
| 844 | int keybits,
|
---|
| 845 | const unsigned char* messages,
|
---|
| 846 | const unsigned int message_lengths[4],
|
---|
| 847 | const unsigned char* expected_result,
|
---|
| 848 | mbedtls_cipher_type_t cipher_type,
|
---|
| 849 | int block_size,
|
---|
| 850 | int num_tests )
|
---|
| 851 | {
|
---|
| 852 | const mbedtls_cipher_info_t *cipher_info;
|
---|
| 853 | int i, ret = 0;
|
---|
| 854 | unsigned char output[MBEDTLS_CIPHER_BLKSIZE_MAX];
|
---|
| 855 |
|
---|
| 856 | cipher_info = mbedtls_cipher_info_from_type( cipher_type );
|
---|
| 857 | if( cipher_info == NULL )
|
---|
| 858 | {
|
---|
| 859 | /* Failing at this point must be due to a build issue */
|
---|
| 860 | ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
|
---|
| 861 | goto exit;
|
---|
| 862 | }
|
---|
| 863 |
|
---|
| 864 | for( i = 0; i < num_tests; i++ )
|
---|
| 865 | {
|
---|
| 866 | if( verbose != 0 )
|
---|
| 867 | mbedtls_printf( " %s CMAC #%u: ", testname, i + 1 );
|
---|
| 868 |
|
---|
| 869 | if( ( ret = mbedtls_cipher_cmac( cipher_info, key, keybits, messages,
|
---|
| 870 | message_lengths[i], output ) ) != 0 )
|
---|
| 871 | {
|
---|
| 872 | if( verbose != 0 )
|
---|
| 873 | mbedtls_printf( "failed\n" );
|
---|
| 874 | goto exit;
|
---|
| 875 | }
|
---|
| 876 |
|
---|
| 877 | if( ( ret = memcmp( output, &expected_result[i * block_size], block_size ) ) != 0 )
|
---|
| 878 | {
|
---|
| 879 | if( verbose != 0 )
|
---|
| 880 | mbedtls_printf( "failed\n" );
|
---|
| 881 | goto exit;
|
---|
| 882 | }
|
---|
| 883 |
|
---|
| 884 | if( verbose != 0 )
|
---|
| 885 | mbedtls_printf( "passed\n" );
|
---|
| 886 | }
|
---|
| 887 | ret = 0;
|
---|
| 888 |
|
---|
| 889 | exit:
|
---|
| 890 | return( ret );
|
---|
| 891 | }
|
---|
| 892 |
|
---|
| 893 | #if defined(MBEDTLS_AES_C)
|
---|
| 894 | static int test_aes128_cmac_prf( int verbose )
|
---|
| 895 | {
|
---|
| 896 | int i;
|
---|
| 897 | int ret;
|
---|
| 898 | unsigned char output[MBEDTLS_AES_BLOCK_SIZE];
|
---|
| 899 |
|
---|
| 900 | for( i = 0; i < NB_PRF_TESTS; i++ )
|
---|
| 901 | {
|
---|
| 902 | mbedtls_printf( " AES CMAC 128 PRF #%u: ", i );
|
---|
| 903 | ret = mbedtls_aes_cmac_prf_128( PRFK, PRFKlen[i], PRFM, 20, output );
|
---|
| 904 | if( ret != 0 ||
|
---|
| 905 | memcmp( output, PRFT[i], MBEDTLS_AES_BLOCK_SIZE ) != 0 )
|
---|
| 906 | {
|
---|
| 907 |
|
---|
| 908 | if( verbose != 0 )
|
---|
| 909 | mbedtls_printf( "failed\n" );
|
---|
| 910 |
|
---|
| 911 | return( ret );
|
---|
| 912 | }
|
---|
| 913 | else if( verbose != 0 )
|
---|
| 914 | {
|
---|
| 915 | mbedtls_printf( "passed\n" );
|
---|
| 916 | }
|
---|
| 917 | }
|
---|
| 918 | return( ret );
|
---|
| 919 | }
|
---|
| 920 | #endif /* MBEDTLS_AES_C */
|
---|
| 921 |
|
---|
| 922 | int mbedtls_cmac_self_test( int verbose )
|
---|
| 923 | {
|
---|
| 924 | int ret;
|
---|
| 925 |
|
---|
| 926 | #if defined(MBEDTLS_AES_C)
|
---|
| 927 | /* AES-128 */
|
---|
| 928 | if( ( ret = cmac_test_subkeys( verbose,
|
---|
| 929 | "AES 128",
|
---|
| 930 | aes_128_key,
|
---|
| 931 | 128,
|
---|
| 932 | (const unsigned char*)aes_128_subkeys,
|
---|
| 933 | MBEDTLS_CIPHER_AES_128_ECB,
|
---|
| 934 | MBEDTLS_AES_BLOCK_SIZE,
|
---|
| 935 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 936 | {
|
---|
| 937 | return( ret );
|
---|
| 938 | }
|
---|
| 939 |
|
---|
| 940 | if( ( ret = cmac_test_wth_cipher( verbose,
|
---|
| 941 | "AES 128",
|
---|
| 942 | aes_128_key,
|
---|
| 943 | 128,
|
---|
| 944 | test_message,
|
---|
| 945 | aes_message_lengths,
|
---|
| 946 | (const unsigned char*)aes_128_expected_result,
|
---|
| 947 | MBEDTLS_CIPHER_AES_128_ECB,
|
---|
| 948 | MBEDTLS_AES_BLOCK_SIZE,
|
---|
| 949 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 950 | {
|
---|
| 951 | return( ret );
|
---|
| 952 | }
|
---|
| 953 |
|
---|
| 954 | /* AES-192 */
|
---|
| 955 | if( ( ret = cmac_test_subkeys( verbose,
|
---|
| 956 | "AES 192",
|
---|
| 957 | aes_192_key,
|
---|
| 958 | 192,
|
---|
| 959 | (const unsigned char*)aes_192_subkeys,
|
---|
| 960 | MBEDTLS_CIPHER_AES_192_ECB,
|
---|
| 961 | MBEDTLS_AES_BLOCK_SIZE,
|
---|
| 962 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 963 | {
|
---|
| 964 | return( ret );
|
---|
| 965 | }
|
---|
| 966 |
|
---|
| 967 | if( ( ret = cmac_test_wth_cipher( verbose,
|
---|
| 968 | "AES 192",
|
---|
| 969 | aes_192_key,
|
---|
| 970 | 192,
|
---|
| 971 | test_message,
|
---|
| 972 | aes_message_lengths,
|
---|
| 973 | (const unsigned char*)aes_192_expected_result,
|
---|
| 974 | MBEDTLS_CIPHER_AES_192_ECB,
|
---|
| 975 | MBEDTLS_AES_BLOCK_SIZE,
|
---|
| 976 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 977 | {
|
---|
| 978 | return( ret );
|
---|
| 979 | }
|
---|
| 980 |
|
---|
| 981 | /* AES-256 */
|
---|
| 982 | if( ( ret = cmac_test_subkeys( verbose,
|
---|
| 983 | "AES 256",
|
---|
| 984 | aes_256_key,
|
---|
| 985 | 256,
|
---|
| 986 | (const unsigned char*)aes_256_subkeys,
|
---|
| 987 | MBEDTLS_CIPHER_AES_256_ECB,
|
---|
| 988 | MBEDTLS_AES_BLOCK_SIZE,
|
---|
| 989 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 990 | {
|
---|
| 991 | return( ret );
|
---|
| 992 | }
|
---|
| 993 |
|
---|
| 994 | if( ( ret = cmac_test_wth_cipher ( verbose,
|
---|
| 995 | "AES 256",
|
---|
| 996 | aes_256_key,
|
---|
| 997 | 256,
|
---|
| 998 | test_message,
|
---|
| 999 | aes_message_lengths,
|
---|
| 1000 | (const unsigned char*)aes_256_expected_result,
|
---|
| 1001 | MBEDTLS_CIPHER_AES_256_ECB,
|
---|
| 1002 | MBEDTLS_AES_BLOCK_SIZE,
|
---|
| 1003 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 1004 | {
|
---|
| 1005 | return( ret );
|
---|
| 1006 | }
|
---|
| 1007 | #endif /* MBEDTLS_AES_C */
|
---|
| 1008 |
|
---|
| 1009 | #if defined(MBEDTLS_DES_C)
|
---|
| 1010 | /* 3DES 2 key */
|
---|
| 1011 | if( ( ret = cmac_test_subkeys( verbose,
|
---|
| 1012 | "3DES 2 key",
|
---|
| 1013 | des3_2key_key,
|
---|
| 1014 | 192,
|
---|
| 1015 | (const unsigned char*)des3_2key_subkeys,
|
---|
| 1016 | MBEDTLS_CIPHER_DES_EDE3_ECB,
|
---|
| 1017 | MBEDTLS_DES3_BLOCK_SIZE,
|
---|
| 1018 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 1019 | {
|
---|
| 1020 | return( ret );
|
---|
| 1021 | }
|
---|
| 1022 |
|
---|
| 1023 | if( ( ret = cmac_test_wth_cipher( verbose,
|
---|
| 1024 | "3DES 2 key",
|
---|
| 1025 | des3_2key_key,
|
---|
| 1026 | 192,
|
---|
| 1027 | test_message,
|
---|
| 1028 | des3_message_lengths,
|
---|
| 1029 | (const unsigned char*)des3_2key_expected_result,
|
---|
| 1030 | MBEDTLS_CIPHER_DES_EDE3_ECB,
|
---|
| 1031 | MBEDTLS_DES3_BLOCK_SIZE,
|
---|
| 1032 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 1033 | {
|
---|
| 1034 | return( ret );
|
---|
| 1035 | }
|
---|
| 1036 |
|
---|
| 1037 | /* 3DES 3 key */
|
---|
| 1038 | if( ( ret = cmac_test_subkeys( verbose,
|
---|
| 1039 | "3DES 3 key",
|
---|
| 1040 | des3_3key_key,
|
---|
| 1041 | 192,
|
---|
| 1042 | (const unsigned char*)des3_3key_subkeys,
|
---|
| 1043 | MBEDTLS_CIPHER_DES_EDE3_ECB,
|
---|
| 1044 | MBEDTLS_DES3_BLOCK_SIZE,
|
---|
| 1045 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 1046 | {
|
---|
| 1047 | return( ret );
|
---|
| 1048 | }
|
---|
| 1049 |
|
---|
| 1050 | if( ( ret = cmac_test_wth_cipher( verbose,
|
---|
| 1051 | "3DES 3 key",
|
---|
| 1052 | des3_3key_key,
|
---|
| 1053 | 192,
|
---|
| 1054 | test_message,
|
---|
| 1055 | des3_message_lengths,
|
---|
| 1056 | (const unsigned char*)des3_3key_expected_result,
|
---|
| 1057 | MBEDTLS_CIPHER_DES_EDE3_ECB,
|
---|
| 1058 | MBEDTLS_DES3_BLOCK_SIZE,
|
---|
| 1059 | NB_CMAC_TESTS_PER_KEY ) ) != 0 )
|
---|
| 1060 | {
|
---|
| 1061 | return( ret );
|
---|
| 1062 | }
|
---|
| 1063 | #endif /* MBEDTLS_DES_C */
|
---|
| 1064 |
|
---|
| 1065 | #if defined(MBEDTLS_AES_C)
|
---|
| 1066 | if( ( ret = test_aes128_cmac_prf( verbose ) ) != 0 )
|
---|
| 1067 | return( ret );
|
---|
| 1068 | #endif /* MBEDTLS_AES_C */
|
---|
| 1069 |
|
---|
| 1070 | if( verbose != 0 )
|
---|
| 1071 | mbedtls_printf( "\n" );
|
---|
| 1072 |
|
---|
| 1073 | return( 0 );
|
---|
| 1074 | }
|
---|
| 1075 |
|
---|
| 1076 | #endif /* MBEDTLS_SELF_TEST */
|
---|
| 1077 |
|
---|
| 1078 | #endif /* MBEDTLS_CMAC_C */
|
---|