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Diffstat (limited to 'thirdparty/mbedtls/library/cmac.c')
| -rw-r--r-- | thirdparty/mbedtls/library/cmac.c | 1080 |
1 files changed, 1080 insertions, 0 deletions
diff --git a/thirdparty/mbedtls/library/cmac.c b/thirdparty/mbedtls/library/cmac.c new file mode 100644 index 0000000000..9dbff90386 --- /dev/null +++ b/thirdparty/mbedtls/library/cmac.c @@ -0,0 +1,1080 @@ +/** + * \file cmac.c + * + * \brief NIST SP800-38B compliant CMAC implementation for AES and 3DES + * + * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * This file is part of mbed TLS (https://tls.mbed.org) + */ + +/* + * References: + * + * - NIST SP 800-38B Recommendation for Block Cipher Modes of Operation: The + * CMAC Mode for Authentication + * http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38b.pdf + * + * - RFC 4493 - The AES-CMAC Algorithm + * https://tools.ietf.org/html/rfc4493 + * + * - RFC 4615 - The Advanced Encryption Standard-Cipher-based Message + * Authentication Code-Pseudo-Random Function-128 (AES-CMAC-PRF-128) + * Algorithm for the Internet Key Exchange Protocol (IKE) + * https://tools.ietf.org/html/rfc4615 + * + * Additional test vectors: ISO/IEC 9797-1 + * + */ + +#if !defined(MBEDTLS_CONFIG_FILE) +#include "mbedtls/config.h" +#else +#include MBEDTLS_CONFIG_FILE +#endif + +#if defined(MBEDTLS_CMAC_C) + +#include "mbedtls/cmac.h" + +#include <string.h> + + +#if defined(MBEDTLS_PLATFORM_C) +#include "mbedtls/platform.h" +#else +#include <stdlib.h> +#define mbedtls_calloc calloc +#define mbedtls_free free +#if defined(MBEDTLS_SELF_TEST) +#include <stdio.h> +#define mbedtls_printf printf +#endif /* MBEDTLS_SELF_TEST */ +#endif /* MBEDTLS_PLATFORM_C */ + +#if !defined(MBEDTLS_CMAC_ALT) || defined(MBEDTLS_SELF_TEST) + +/* Implementation that should never be optimized out by the compiler */ +static void mbedtls_zeroize( void *v, size_t n ) { + volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0; +} + +/* + * Multiplication by u in the Galois field of GF(2^n) + * + * As explained in NIST SP 800-38B, this can be computed: + * + * If MSB(p) = 0, then p = (p << 1) + * If MSB(p) = 1, then p = (p << 1) ^ R_n + * with R_64 = 0x1B and R_128 = 0x87 + * + * Input and output MUST NOT point to the same buffer + * Block size must be 8 bytes or 16 bytes - the block sizes for DES and AES. + */ +static int cmac_multiply_by_u( unsigned char *output, + const unsigned char *input, + size_t blocksize ) +{ + const unsigned char R_128 = 0x87; + const unsigned char R_64 = 0x1B; + unsigned char R_n, mask; + unsigned char overflow = 0x00; + int i; + + if( blocksize == MBEDTLS_AES_BLOCK_SIZE ) + { + R_n = R_128; + } + else if( blocksize == MBEDTLS_DES3_BLOCK_SIZE ) + { + R_n = R_64; + } + else + { + return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA ); + } + + for( i = (int)blocksize - 1; i >= 0; i-- ) + { + output[i] = input[i] << 1 | overflow; + overflow = input[i] >> 7; + } + + /* mask = ( input[0] >> 7 ) ? 0xff : 0x00 + * using bit operations to avoid branches */ + + /* MSVC has a warning about unary minus on unsigned, but this is + * well-defined and precisely what we want to do here */ +#if defined(_MSC_VER) +#pragma warning( push ) +#pragma warning( disable : 4146 ) +#endif + mask = - ( input[0] >> 7 ); +#if defined(_MSC_VER) +#pragma warning( pop ) +#endif + + output[ blocksize - 1 ] ^= R_n & mask; + + return( 0 ); +} + +/* + * Generate subkeys + * + * - as specified by RFC 4493, section 2.3 Subkey Generation Algorithm + */ +static int cmac_generate_subkeys( mbedtls_cipher_context_t *ctx, + unsigned char* K1, unsigned char* K2 ) +{ + int ret; + unsigned char L[MBEDTLS_CIPHER_BLKSIZE_MAX]; + size_t olen, block_size; + + mbedtls_zeroize( L, sizeof( L ) ); + + block_size = ctx->cipher_info->block_size; + + /* Calculate Ek(0) */ + if( ( ret = mbedtls_cipher_update( ctx, L, block_size, L, &olen ) ) != 0 ) + goto exit; + + /* + * Generate K1 and K2 + */ + if( ( ret = cmac_multiply_by_u( K1, L , block_size ) ) != 0 ) + goto exit; + + if( ( ret = cmac_multiply_by_u( K2, K1 , block_size ) ) != 0 ) + goto exit; + +exit: + mbedtls_zeroize( L, sizeof( L ) ); + + return( ret ); +} +#endif /* !defined(MBEDTLS_CMAC_ALT) || defined(MBEDTLS_SELF_TEST) */ + +#if !defined(MBEDTLS_CMAC_ALT) +static void cmac_xor_block( unsigned char *output, const unsigned char *input1, + const unsigned char *input2, + const size_t block_size ) +{ + size_t idx; + + for( idx = 0; idx < block_size; idx++ ) + output[ idx ] = input1[ idx ] ^ input2[ idx ]; +} + +/* + * Create padded last block from (partial) last block. + * + * We can't use the padding option from the cipher layer, as it only works for + * CBC and we use ECB mode, and anyway we need to XOR K1 or K2 in addition. + */ +static void cmac_pad( unsigned char padded_block[MBEDTLS_CIPHER_BLKSIZE_MAX], + size_t padded_block_len, + const unsigned char *last_block, + size_t last_block_len ) +{ + size_t j; + + for( j = 0; j < padded_block_len; j++ ) + { + if( j < last_block_len ) + padded_block[j] = last_block[j]; + else if( j == last_block_len ) + padded_block[j] = 0x80; + else + padded_block[j] = 0x00; + } +} + +int mbedtls_cipher_cmac_starts( mbedtls_cipher_context_t *ctx, + const unsigned char *key, size_t keybits ) +{ + mbedtls_cipher_type_t type; + mbedtls_cmac_context_t *cmac_ctx; + int retval; + + if( ctx == NULL || ctx->cipher_info == NULL || key == NULL ) + return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA ); + + if( ( retval = mbedtls_cipher_setkey( ctx, key, (int)keybits, + MBEDTLS_ENCRYPT ) ) != 0 ) + return( retval ); + + type = ctx->cipher_info->type; + + switch( type ) + { + case MBEDTLS_CIPHER_AES_128_ECB: + case MBEDTLS_CIPHER_AES_192_ECB: + case MBEDTLS_CIPHER_AES_256_ECB: + case MBEDTLS_CIPHER_DES_EDE3_ECB: + break; + default: + return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA ); + } + + /* Allocated and initialise in the cipher context memory for the CMAC + * context */ + cmac_ctx = mbedtls_calloc( 1, sizeof( mbedtls_cmac_context_t ) ); + if( cmac_ctx == NULL ) + return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED ); + + ctx->cmac_ctx = cmac_ctx; + + mbedtls_zeroize( cmac_ctx->state, sizeof( cmac_ctx->state ) ); + + return 0; +} + +int mbedtls_cipher_cmac_update( mbedtls_cipher_context_t *ctx, + const unsigned char *input, size_t ilen ) +{ + mbedtls_cmac_context_t* cmac_ctx; + unsigned char *state; + int ret = 0; + size_t n, j, olen, block_size; + + if( ctx == NULL || ctx->cipher_info == NULL || input == NULL || + ctx->cmac_ctx == NULL ) + return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA ); + + cmac_ctx = ctx->cmac_ctx; + block_size = ctx->cipher_info->block_size; + state = ctx->cmac_ctx->state; + + /* Is there data still to process from the last call, that's greater in + * size than a block? */ + if( cmac_ctx->unprocessed_len > 0 && + ilen > block_size - cmac_ctx->unprocessed_len ) + { + memcpy( &cmac_ctx->unprocessed_block[cmac_ctx->unprocessed_len], + input, + block_size - cmac_ctx->unprocessed_len ); + + cmac_xor_block( state, cmac_ctx->unprocessed_block, state, block_size ); + + if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state, + &olen ) ) != 0 ) + { + goto exit; + } + + input += block_size - cmac_ctx->unprocessed_len; + ilen -= block_size - cmac_ctx->unprocessed_len; + cmac_ctx->unprocessed_len = 0; + } + + /* n is the number of blocks including any final partial block */ + n = ( ilen + block_size - 1 ) / block_size; + + /* Iterate across the input data in block sized chunks, excluding any + * final partial or complete block */ + for( j = 1; j < n; j++ ) + { + cmac_xor_block( state, input, state, block_size ); + + if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state, + &olen ) ) != 0 ) + goto exit; + + ilen -= block_size; + input += block_size; + } + + /* If there is data left over that wasn't aligned to a block */ + if( ilen > 0 ) + { + memcpy( &cmac_ctx->unprocessed_block[cmac_ctx->unprocessed_len], + input, + ilen ); + cmac_ctx->unprocessed_len += ilen; + } + +exit: + return( ret ); +} + +int mbedtls_cipher_cmac_finish( mbedtls_cipher_context_t *ctx, + unsigned char *output ) +{ + mbedtls_cmac_context_t* cmac_ctx; + unsigned char *state, *last_block; + unsigned char K1[MBEDTLS_CIPHER_BLKSIZE_MAX]; + unsigned char K2[MBEDTLS_CIPHER_BLKSIZE_MAX]; + unsigned char M_last[MBEDTLS_CIPHER_BLKSIZE_MAX]; + int ret; + size_t olen, block_size; + + if( ctx == NULL || ctx->cipher_info == NULL || ctx->cmac_ctx == NULL || + output == NULL ) + return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA ); + + cmac_ctx = ctx->cmac_ctx; + block_size = ctx->cipher_info->block_size; + state = cmac_ctx->state; + + mbedtls_zeroize( K1, sizeof( K1 ) ); + mbedtls_zeroize( K2, sizeof( K2 ) ); + cmac_generate_subkeys( ctx, K1, K2 ); + + last_block = cmac_ctx->unprocessed_block; + + /* Calculate last block */ + if( cmac_ctx->unprocessed_len < block_size ) + { + cmac_pad( M_last, block_size, last_block, cmac_ctx->unprocessed_len ); + cmac_xor_block( M_last, M_last, K2, block_size ); + } + else + { + /* Last block is complete block */ + cmac_xor_block( M_last, last_block, K1, block_size ); + } + + + cmac_xor_block( state, M_last, state, block_size ); + if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state, + &olen ) ) != 0 ) + { + goto exit; + } + + memcpy( output, state, block_size ); + +exit: + /* Wipe the generated keys on the stack, and any other transients to avoid + * side channel leakage */ + mbedtls_zeroize( K1, sizeof( K1 ) ); + mbedtls_zeroize( K2, sizeof( K2 ) ); + + cmac_ctx->unprocessed_len = 0; + mbedtls_zeroize( cmac_ctx->unprocessed_block, + sizeof( cmac_ctx->unprocessed_block ) ); + + mbedtls_zeroize( state, MBEDTLS_CIPHER_BLKSIZE_MAX ); + return( ret ); +} + +int mbedtls_cipher_cmac_reset( mbedtls_cipher_context_t *ctx ) +{ + mbedtls_cmac_context_t* cmac_ctx; + + if( ctx == NULL || ctx->cipher_info == NULL || ctx->cmac_ctx == NULL ) + return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA ); + + cmac_ctx = ctx->cmac_ctx; + + /* Reset the internal state */ + cmac_ctx->unprocessed_len = 0; + mbedtls_zeroize( cmac_ctx->unprocessed_block, + sizeof( cmac_ctx->unprocessed_block ) ); + mbedtls_zeroize( cmac_ctx->state, + sizeof( cmac_ctx->state ) ); + + return( 0 ); +} + +int mbedtls_cipher_cmac( const mbedtls_cipher_info_t *cipher_info, + const unsigned char *key, size_t keylen, + const unsigned char *input, size_t ilen, + unsigned char *output ) +{ + mbedtls_cipher_context_t ctx; + int ret; + + if( cipher_info == NULL || key == NULL || input == NULL || output == NULL ) + return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA ); + + mbedtls_cipher_init( &ctx ); + + if( ( ret = mbedtls_cipher_setup( &ctx, cipher_info ) ) != 0 ) + goto exit; + + ret = mbedtls_cipher_cmac_starts( &ctx, key, keylen ); + if( ret != 0 ) + goto exit; + + ret = mbedtls_cipher_cmac_update( &ctx, input, ilen ); + if( ret != 0 ) + goto exit; + + ret = mbedtls_cipher_cmac_finish( &ctx, output ); + +exit: + mbedtls_cipher_free( &ctx ); + + return( ret ); +} + +#if defined(MBEDTLS_AES_C) +/* + * Implementation of AES-CMAC-PRF-128 defined in RFC 4615 + */ +int mbedtls_aes_cmac_prf_128( const unsigned char *key, size_t key_length, + const unsigned char *input, size_t in_len, + unsigned char *output ) +{ + int ret; + const mbedtls_cipher_info_t *cipher_info; + unsigned char zero_key[MBEDTLS_AES_BLOCK_SIZE]; + unsigned char int_key[MBEDTLS_AES_BLOCK_SIZE]; + + if( key == NULL || input == NULL || output == NULL ) + return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA ); + + cipher_info = mbedtls_cipher_info_from_type( MBEDTLS_CIPHER_AES_128_ECB ); + if( cipher_info == NULL ) + { + /* Failing at this point must be due to a build issue */ + ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE; + goto exit; + } + + if( key_length == MBEDTLS_AES_BLOCK_SIZE ) + { + /* Use key as is */ + memcpy( int_key, key, MBEDTLS_AES_BLOCK_SIZE ); + } + else + { + memset( zero_key, 0, MBEDTLS_AES_BLOCK_SIZE ); + + ret = mbedtls_cipher_cmac( cipher_info, zero_key, 128, key, + key_length, int_key ); + if( ret != 0 ) + goto exit; + } + + ret = mbedtls_cipher_cmac( cipher_info, int_key, 128, input, in_len, + output ); + +exit: + mbedtls_zeroize( int_key, sizeof( int_key ) ); + + return( ret ); +} +#endif /* MBEDTLS_AES_C */ + +#endif /* !MBEDTLS_CMAC_ALT */ + +#if defined(MBEDTLS_SELF_TEST) +/* + * CMAC test data for SP800-38B + * http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/AES_CMAC.pdf + * http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/TDES_CMAC.pdf + * + * AES-CMAC-PRF-128 test data from RFC 4615 + * https://tools.ietf.org/html/rfc4615#page-4 + */ + +#define NB_CMAC_TESTS_PER_KEY 4 +#define NB_PRF_TESTS 3 + +#if defined(MBEDTLS_AES_C) || defined(MBEDTLS_DES_C) +/* All CMAC test inputs are truncated from the same 64 byte buffer. */ +static const unsigned char test_message[] = { + /* PT */ + 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, + 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a, + 0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, + 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51, + 0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, + 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef, + 0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, + 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10 +}; +#endif /* MBEDTLS_AES_C || MBEDTLS_DES_C */ + +#if defined(MBEDTLS_AES_C) +/* Truncation point of message for AES CMAC tests */ +static const unsigned int aes_message_lengths[NB_CMAC_TESTS_PER_KEY] = { + /* Mlen */ + 0, + 16, + 20, + 64 +}; + +/* CMAC-AES128 Test Data */ +static const unsigned char aes_128_key[16] = { + 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, + 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c +}; +static const unsigned char aes_128_subkeys[2][MBEDTLS_AES_BLOCK_SIZE] = { + { + /* K1 */ + 0xfb, 0xee, 0xd6, 0x18, 0x35, 0x71, 0x33, 0x66, + 0x7c, 0x85, 0xe0, 0x8f, 0x72, 0x36, 0xa8, 0xde + }, + { + /* K2 */ + 0xf7, 0xdd, 0xac, 0x30, 0x6a, 0xe2, 0x66, 0xcc, + 0xf9, 0x0b, 0xc1, 0x1e, 0xe4, 0x6d, 0x51, 0x3b + } +}; +static const unsigned char aes_128_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_AES_BLOCK_SIZE] = { + { + /* Example #1 */ + 0xbb, 0x1d, 0x69, 0x29, 0xe9, 0x59, 0x37, 0x28, + 0x7f, 0xa3, 0x7d, 0x12, 0x9b, 0x75, 0x67, 0x46 + }, + { + /* Example #2 */ + 0x07, 0x0a, 0x16, 0xb4, 0x6b, 0x4d, 0x41, 0x44, + 0xf7, 0x9b, 0xdd, 0x9d, 0xd0, 0x4a, 0x28, 0x7c + }, + { + /* Example #3 */ + 0x7d, 0x85, 0x44, 0x9e, 0xa6, 0xea, 0x19, 0xc8, + 0x23, 0xa7, 0xbf, 0x78, 0x83, 0x7d, 0xfa, 0xde + }, + { + /* Example #4 */ + 0x51, 0xf0, 0xbe, 0xbf, 0x7e, 0x3b, 0x9d, 0x92, + 0xfc, 0x49, 0x74, 0x17, 0x79, 0x36, 0x3c, 0xfe + } +}; + +/* CMAC-AES192 Test Data */ +static const unsigned char aes_192_key[24] = { + 0x8e, 0x73, 0xb0, 0xf7, 0xda, 0x0e, 0x64, 0x52, + 0xc8, 0x10, 0xf3, 0x2b, 0x80, 0x90, 0x79, 0xe5, + 0x62, 0xf8, 0xea, 0xd2, 0x52, 0x2c, 0x6b, 0x7b +}; +static const unsigned char aes_192_subkeys[2][MBEDTLS_AES_BLOCK_SIZE] = { + { + /* K1 */ + 0x44, 0x8a, 0x5b, 0x1c, 0x93, 0x51, 0x4b, 0x27, + 0x3e, 0xe6, 0x43, 0x9d, 0xd4, 0xda, 0xa2, 0x96 + }, + { + /* K2 */ + 0x89, 0x14, 0xb6, 0x39, 0x26, 0xa2, 0x96, 0x4e, + 0x7d, 0xcc, 0x87, 0x3b, 0xa9, 0xb5, 0x45, 0x2c + } +}; +static const unsigned char aes_192_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_AES_BLOCK_SIZE] = { + { + /* Example #1 */ + 0xd1, 0x7d, 0xdf, 0x46, 0xad, 0xaa, 0xcd, 0xe5, + 0x31, 0xca, 0xc4, 0x83, 0xde, 0x7a, 0x93, 0x67 + }, + { + /* Example #2 */ + 0x9e, 0x99, 0xa7, 0xbf, 0x31, 0xe7, 0x10, 0x90, + 0x06, 0x62, 0xf6, 0x5e, 0x61, 0x7c, 0x51, 0x84 + }, + { + /* Example #3 */ + 0x3d, 0x75, 0xc1, 0x94, 0xed, 0x96, 0x07, 0x04, + 0x44, 0xa9, 0xfa, 0x7e, 0xc7, 0x40, 0xec, 0xf8 + }, + { + /* Example #4 */ + 0xa1, 0xd5, 0xdf, 0x0e, 0xed, 0x79, 0x0f, 0x79, + 0x4d, 0x77, 0x58, 0x96, 0x59, 0xf3, 0x9a, 0x11 + } +}; + +/* CMAC-AES256 Test Data */ +static const unsigned char aes_256_key[32] = { + 0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe, + 0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81, + 0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7, + 0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4 +}; +static const unsigned char aes_256_subkeys[2][MBEDTLS_AES_BLOCK_SIZE] = { + { + /* K1 */ + 0xca, 0xd1, 0xed, 0x03, 0x29, 0x9e, 0xed, 0xac, + 0x2e, 0x9a, 0x99, 0x80, 0x86, 0x21, 0x50, 0x2f + }, + { + /* K2 */ + 0x95, 0xa3, 0xda, 0x06, 0x53, 0x3d, 0xdb, 0x58, + 0x5d, 0x35, 0x33, 0x01, 0x0c, 0x42, 0xa0, 0xd9 + } +}; +static const unsigned char aes_256_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_AES_BLOCK_SIZE] = { + { + /* Example #1 */ + 0x02, 0x89, 0x62, 0xf6, 0x1b, 0x7b, 0xf8, 0x9e, + 0xfc, 0x6b, 0x55, 0x1f, 0x46, 0x67, 0xd9, 0x83 + }, + { + /* Example #2 */ + 0x28, 0xa7, 0x02, 0x3f, 0x45, 0x2e, 0x8f, 0x82, + 0xbd, 0x4b, 0xf2, 0x8d, 0x8c, 0x37, 0xc3, 0x5c + }, + { + /* Example #3 */ + 0x15, 0x67, 0x27, 0xdc, 0x08, 0x78, 0x94, 0x4a, + 0x02, 0x3c, 0x1f, 0xe0, 0x3b, 0xad, 0x6d, 0x93 + }, + { + /* Example #4 */ + 0xe1, 0x99, 0x21, 0x90, 0x54, 0x9f, 0x6e, 0xd5, + 0x69, 0x6a, 0x2c, 0x05, 0x6c, 0x31, 0x54, 0x10 + } +}; +#endif /* MBEDTLS_AES_C */ + +#if defined(MBEDTLS_DES_C) +/* Truncation point of message for 3DES CMAC tests */ +static const unsigned int des3_message_lengths[NB_CMAC_TESTS_PER_KEY] = { + 0, + 16, + 20, + 32 +}; + +/* CMAC-TDES (Generation) - 2 Key Test Data */ +static const unsigned char des3_2key_key[24] = { + /* Key1 */ + 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, + /* Key2 */ + 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xEF, 0x01, + /* Key3 */ + 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef +}; +static const unsigned char des3_2key_subkeys[2][8] = { + { + /* K1 */ + 0x0d, 0xd2, 0xcb, 0x7a, 0x3d, 0x88, 0x88, 0xd9 + }, + { + /* K2 */ + 0x1b, 0xa5, 0x96, 0xf4, 0x7b, 0x11, 0x11, 0xb2 + } +}; +static const unsigned char des3_2key_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_DES3_BLOCK_SIZE] = { + { + /* Sample #1 */ + 0x79, 0xce, 0x52, 0xa7, 0xf7, 0x86, 0xa9, 0x60 + }, + { + /* Sample #2 */ + 0xcc, 0x18, 0xa0, 0xb7, 0x9a, 0xf2, 0x41, 0x3b + }, + { + /* Sample #3 */ + 0xc0, 0x6d, 0x37, 0x7e, 0xcd, 0x10, 0x19, 0x69 + }, + { + /* Sample #4 */ + 0x9c, 0xd3, 0x35, 0x80, 0xf9, 0xb6, 0x4d, 0xfb + } +}; + +/* CMAC-TDES (Generation) - 3 Key Test Data */ +static const unsigned char des3_3key_key[24] = { + /* Key1 */ + 0x01, 0x23, 0x45, 0x67, 0x89, 0xaa, 0xcd, 0xef, + /* Key2 */ + 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, + /* Key3 */ + 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23 +}; +static const unsigned char des3_3key_subkeys[2][8] = { + { + /* K1 */ + 0x9d, 0x74, 0xe7, 0x39, 0x33, 0x17, 0x96, 0xc0 + }, + { + /* K2 */ + 0x3a, 0xe9, 0xce, 0x72, 0x66, 0x2f, 0x2d, 0x9b + } +}; +static const unsigned char des3_3key_expected_result[NB_CMAC_TESTS_PER_KEY][MBEDTLS_DES3_BLOCK_SIZE] = { + { + /* Sample #1 */ + 0x7d, 0xb0, 0xd3, 0x7d, 0xf9, 0x36, 0xc5, 0x50 + }, + { + /* Sample #2 */ + 0x30, 0x23, 0x9c, 0xf1, 0xf5, 0x2e, 0x66, 0x09 + }, + { + /* Sample #3 */ + 0x6c, 0x9f, 0x3e, 0xe4, 0x92, 0x3f, 0x6b, 0xe2 + }, + { + /* Sample #4 */ + 0x99, 0x42, 0x9b, 0xd0, 0xbF, 0x79, 0x04, 0xe5 + } +}; + +#endif /* MBEDTLS_DES_C */ + +#if defined(MBEDTLS_AES_C) +/* AES AES-CMAC-PRF-128 Test Data */ +static const unsigned char PRFK[] = { + /* Key */ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0xed, 0xcb +}; + +/* Sizes in bytes */ +static const size_t PRFKlen[NB_PRF_TESTS] = { + 18, + 16, + 10 +}; + +/* Message */ +static const unsigned char PRFM[] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13 +}; + +static const unsigned char PRFT[NB_PRF_TESTS][16] = { + { + 0x84, 0xa3, 0x48, 0xa4, 0xa4, 0x5d, 0x23, 0x5b, + 0xab, 0xff, 0xfc, 0x0d, 0x2b, 0x4d, 0xa0, 0x9a + }, + { + 0x98, 0x0a, 0xe8, 0x7b, 0x5f, 0x4c, 0x9c, 0x52, + 0x14, 0xf5, 0xb6, 0xa8, 0x45, 0x5e, 0x4c, 0x2d + }, + { + 0x29, 0x0d, 0x9e, 0x11, 0x2e, 0xdb, 0x09, 0xee, + 0x14, 0x1f, 0xcf, 0x64, 0xc0, 0xb7, 0x2f, 0x3d + } +}; +#endif /* MBEDTLS_AES_C */ + +static int cmac_test_subkeys( int verbose, + const char* testname, + const unsigned char* key, + int keybits, + const unsigned char* subkeys, + mbedtls_cipher_type_t cipher_type, + int block_size, + int num_tests ) +{ + int i, ret; + mbedtls_cipher_context_t ctx; + const mbedtls_cipher_info_t *cipher_info; + unsigned char K1[MBEDTLS_CIPHER_BLKSIZE_MAX]; + unsigned char K2[MBEDTLS_CIPHER_BLKSIZE_MAX]; + + cipher_info = mbedtls_cipher_info_from_type( cipher_type ); + if( cipher_info == NULL ) + { + /* Failing at this point must be due to a build issue */ + return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE ); + } + + for( i = 0; i < num_tests; i++ ) + { + if( verbose != 0 ) + mbedtls_printf( " %s CMAC subkey #%u: ", testname, i + 1 ); + + mbedtls_cipher_init( &ctx ); + + if( ( ret = mbedtls_cipher_setup( &ctx, cipher_info ) ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "test execution failed\n" ); + + goto cleanup; + } + + if( ( ret = mbedtls_cipher_setkey( &ctx, key, keybits, + MBEDTLS_ENCRYPT ) ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "test execution failed\n" ); + + goto cleanup; + } + + ret = cmac_generate_subkeys( &ctx, K1, K2 ); + if( ret != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + goto cleanup; + } + + if( ( ret = memcmp( K1, subkeys, block_size ) ) != 0 || + ( ret = memcmp( K2, &subkeys[block_size], block_size ) ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + goto cleanup; + } + + if( verbose != 0 ) + mbedtls_printf( "passed\n" ); + + mbedtls_cipher_free( &ctx ); + } + + goto exit; + +cleanup: + mbedtls_cipher_free( &ctx ); + +exit: + return( ret ); +} + +static int cmac_test_wth_cipher( int verbose, + const char* testname, + const unsigned char* key, + int keybits, + const unsigned char* messages, + const unsigned int message_lengths[4], + const unsigned char* expected_result, + mbedtls_cipher_type_t cipher_type, + int block_size, + int num_tests ) +{ + const mbedtls_cipher_info_t *cipher_info; + int i, ret; + unsigned char output[MBEDTLS_CIPHER_BLKSIZE_MAX]; + + cipher_info = mbedtls_cipher_info_from_type( cipher_type ); + if( cipher_info == NULL ) + { + /* Failing at this point must be due to a build issue */ + ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE; + goto exit; + } + + for( i = 0; i < num_tests; i++ ) + { + if( verbose != 0 ) + mbedtls_printf( " %s CMAC #%u: ", testname, i + 1 ); + + if( ( ret = mbedtls_cipher_cmac( cipher_info, key, keybits, messages, + message_lengths[i], output ) ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + goto exit; + } + + if( ( ret = memcmp( output, &expected_result[i * block_size], block_size ) ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + goto exit; + } + + if( verbose != 0 ) + mbedtls_printf( "passed\n" ); + } + +exit: + return( ret ); +} + +#if defined(MBEDTLS_AES_C) +static int test_aes128_cmac_prf( int verbose ) +{ + int i; + int ret; + unsigned char output[MBEDTLS_AES_BLOCK_SIZE]; + + for( i = 0; i < NB_PRF_TESTS; i++ ) + { + mbedtls_printf( " AES CMAC 128 PRF #%u: ", i ); + ret = mbedtls_aes_cmac_prf_128( PRFK, PRFKlen[i], PRFM, 20, output ); + if( ret != 0 || + memcmp( output, PRFT[i], MBEDTLS_AES_BLOCK_SIZE ) != 0 ) + { + + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + return( ret ); + } + else if( verbose != 0 ) + { + mbedtls_printf( "passed\n" ); + } + } + return( ret ); +} +#endif /* MBEDTLS_AES_C */ + +int mbedtls_cmac_self_test( int verbose ) +{ + int ret; + +#if defined(MBEDTLS_AES_C) + /* AES-128 */ + if( ( ret = cmac_test_subkeys( verbose, + "AES 128", + aes_128_key, + 128, + (const unsigned char*)aes_128_subkeys, + MBEDTLS_CIPHER_AES_128_ECB, + MBEDTLS_AES_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } + + if( ( ret = cmac_test_wth_cipher( verbose, + "AES 128", + aes_128_key, + 128, + test_message, + aes_message_lengths, + (const unsigned char*)aes_128_expected_result, + MBEDTLS_CIPHER_AES_128_ECB, + MBEDTLS_AES_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } + + /* AES-192 */ + if( ( ret = cmac_test_subkeys( verbose, + "AES 192", + aes_192_key, + 192, + (const unsigned char*)aes_192_subkeys, + MBEDTLS_CIPHER_AES_192_ECB, + MBEDTLS_AES_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } + + if( ( ret = cmac_test_wth_cipher( verbose, + "AES 192", + aes_192_key, + 192, + test_message, + aes_message_lengths, + (const unsigned char*)aes_192_expected_result, + MBEDTLS_CIPHER_AES_192_ECB, + MBEDTLS_AES_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } + + /* AES-256 */ + if( ( ret = cmac_test_subkeys( verbose, + "AES 256", + aes_256_key, + 256, + (const unsigned char*)aes_256_subkeys, + MBEDTLS_CIPHER_AES_256_ECB, + MBEDTLS_AES_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } + + if( ( ret = cmac_test_wth_cipher ( verbose, + "AES 256", + aes_256_key, + 256, + test_message, + aes_message_lengths, + (const unsigned char*)aes_256_expected_result, + MBEDTLS_CIPHER_AES_256_ECB, + MBEDTLS_AES_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } +#endif /* MBEDTLS_AES_C */ + +#if defined(MBEDTLS_DES_C) + /* 3DES 2 key */ + if( ( ret = cmac_test_subkeys( verbose, + "3DES 2 key", + des3_2key_key, + 192, + (const unsigned char*)des3_2key_subkeys, + MBEDTLS_CIPHER_DES_EDE3_ECB, + MBEDTLS_DES3_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } + + if( ( ret = cmac_test_wth_cipher( verbose, + "3DES 2 key", + des3_2key_key, + 192, + test_message, + des3_message_lengths, + (const unsigned char*)des3_2key_expected_result, + MBEDTLS_CIPHER_DES_EDE3_ECB, + MBEDTLS_DES3_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } + + /* 3DES 3 key */ + if( ( ret = cmac_test_subkeys( verbose, + "3DES 3 key", + des3_3key_key, + 192, + (const unsigned char*)des3_3key_subkeys, + MBEDTLS_CIPHER_DES_EDE3_ECB, + MBEDTLS_DES3_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } + + if( ( ret = cmac_test_wth_cipher( verbose, + "3DES 3 key", + des3_3key_key, + 192, + test_message, + des3_message_lengths, + (const unsigned char*)des3_3key_expected_result, + MBEDTLS_CIPHER_DES_EDE3_ECB, + MBEDTLS_DES3_BLOCK_SIZE, + NB_CMAC_TESTS_PER_KEY ) ) != 0 ) + { + return( ret ); + } +#endif /* MBEDTLS_DES_C */ + +#if defined(MBEDTLS_AES_C) + if( ( ret = test_aes128_cmac_prf( verbose ) ) != 0 ) + return( ret ); +#endif /* MBEDTLS_AES_C */ + + if( verbose != 0 ) + mbedtls_printf( "\n" ); + + return( 0 ); +} + +#endif /* MBEDTLS_SELF_TEST */ + +#endif /* MBEDTLS_CMAC_C */ |