/** | |
* \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 "mbedtls/platform_util.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) | |
/* | |
* 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_platform_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_platform_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_platform_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_platform_zeroize( K1, sizeof( K1 ) ); | |
mbedtls_platform_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_platform_zeroize( K1, sizeof( K1 ) ); | |
mbedtls_platform_zeroize( K2, sizeof( K2 ) ); | |
cmac_ctx->unprocessed_len = 0; | |
mbedtls_platform_zeroize( cmac_ctx->unprocessed_block, | |
sizeof( cmac_ctx->unprocessed_block ) ); | |
mbedtls_platform_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_platform_zeroize( cmac_ctx->unprocessed_block, | |
sizeof( cmac_ctx->unprocessed_block ) ); | |
mbedtls_platform_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_platform_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 = 0; | |
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 ); | |
} | |
ret = 0; | |
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 = 0; | |
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" ); | |
} | |
ret = 0; | |
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 */ |