mirror of
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1087 lines
33 KiB
C
1087 lines
33 KiB
C
/**
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* \file cmac.c
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*
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* \brief NIST SP800-38B compliant CMAC implementation for AES and 3DES
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* References:
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*
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* - NIST SP 800-38B Recommendation for Block Cipher Modes of Operation: The
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* CMAC Mode for Authentication
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* http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38b.pdf
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*
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* - RFC 4493 - The AES-CMAC Algorithm
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* https://tools.ietf.org/html/rfc4493
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*
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* - RFC 4615 - The Advanced Encryption Standard-Cipher-based Message
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* Authentication Code-Pseudo-Random Function-128 (AES-CMAC-PRF-128)
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* Algorithm for the Internet Key Exchange Protocol (IKE)
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* https://tools.ietf.org/html/rfc4615
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*
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* Additional test vectors: ISO/IEC 9797-1
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*
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*/
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#include "common.h"
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#if defined(MBEDTLS_CMAC_C)
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#include "mbedtls/cmac.h"
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#include "mbedtls/platform_util.h"
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#include "mbedtls/error.h"
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#include "mbedtls/platform.h"
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#include <string.h>
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#if !defined(MBEDTLS_CMAC_ALT) || defined(MBEDTLS_SELF_TEST)
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/*
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* Multiplication by u in the Galois field of GF(2^n)
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*
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* As explained in NIST SP 800-38B, this can be computed:
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*
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* If MSB(p) = 0, then p = (p << 1)
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* If MSB(p) = 1, then p = (p << 1) ^ R_n
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* with R_64 = 0x1B and R_128 = 0x87
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*
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* Input and output MUST NOT point to the same buffer
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* Block size must be 8 bytes or 16 bytes - the block sizes for DES and AES.
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*/
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static int cmac_multiply_by_u( unsigned char *output,
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const unsigned char *input,
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size_t blocksize )
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{
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const unsigned char R_128 = 0x87;
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const unsigned char R_64 = 0x1B;
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unsigned char R_n, mask;
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unsigned char overflow = 0x00;
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int i;
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if( blocksize == MBEDTLS_AES_BLOCK_SIZE )
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{
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R_n = R_128;
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}
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else if( blocksize == MBEDTLS_DES3_BLOCK_SIZE )
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{
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R_n = R_64;
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}
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else
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{
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return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
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}
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for( i = (int)blocksize - 1; i >= 0; i-- )
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{
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output[i] = input[i] << 1 | overflow;
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overflow = input[i] >> 7;
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}
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/* mask = ( input[0] >> 7 ) ? 0xff : 0x00
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* using bit operations to avoid branches */
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/* MSVC has a warning about unary minus on unsigned, but this is
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* well-defined and precisely what we want to do here */
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#if defined(_MSC_VER)
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#pragma warning( push )
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#pragma warning( disable : 4146 )
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#endif
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mask = - ( input[0] >> 7 );
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#if defined(_MSC_VER)
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#pragma warning( pop )
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#endif
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output[ blocksize - 1 ] ^= R_n & mask;
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return( 0 );
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}
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/*
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* Generate subkeys
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*
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* - as specified by RFC 4493, section 2.3 Subkey Generation Algorithm
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*/
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static int cmac_generate_subkeys( mbedtls_cipher_context_t *ctx,
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unsigned char* K1, unsigned char* K2 )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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unsigned char L[MBEDTLS_CIPHER_BLKSIZE_MAX];
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size_t olen, block_size;
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mbedtls_platform_zeroize( L, sizeof( L ) );
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block_size = ctx->cipher_info->block_size;
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/* Calculate Ek(0) */
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if( ( ret = mbedtls_cipher_update( ctx, L, block_size, L, &olen ) ) != 0 )
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goto exit;
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/*
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* Generate K1 and K2
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*/
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if( ( ret = cmac_multiply_by_u( K1, L , block_size ) ) != 0 )
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goto exit;
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if( ( ret = cmac_multiply_by_u( K2, K1 , block_size ) ) != 0 )
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goto exit;
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exit:
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mbedtls_platform_zeroize( L, sizeof( L ) );
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return( ret );
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}
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#endif /* !defined(MBEDTLS_CMAC_ALT) || defined(MBEDTLS_SELF_TEST) */
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#if !defined(MBEDTLS_CMAC_ALT)
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static void cmac_xor_block( unsigned char *output, const unsigned char *input1,
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const unsigned char *input2,
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const size_t block_size )
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{
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size_t idx;
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for( idx = 0; idx < block_size; idx++ )
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output[ idx ] = input1[ idx ] ^ input2[ idx ];
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}
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/*
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* Create padded last block from (partial) last block.
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*
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* We can't use the padding option from the cipher layer, as it only works for
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* CBC and we use ECB mode, and anyway we need to XOR K1 or K2 in addition.
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*/
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static void cmac_pad( unsigned char padded_block[MBEDTLS_CIPHER_BLKSIZE_MAX],
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size_t padded_block_len,
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const unsigned char *last_block,
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size_t last_block_len )
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{
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size_t j;
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for( j = 0; j < padded_block_len; j++ )
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{
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if( j < last_block_len )
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padded_block[j] = last_block[j];
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else if( j == last_block_len )
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padded_block[j] = 0x80;
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else
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padded_block[j] = 0x00;
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}
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}
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int mbedtls_cipher_cmac_starts( mbedtls_cipher_context_t *ctx,
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const unsigned char *key, size_t keybits )
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{
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mbedtls_cipher_type_t type;
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mbedtls_cmac_context_t *cmac_ctx;
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int retval;
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if( ctx == NULL || ctx->cipher_info == NULL || key == NULL )
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return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
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if( ( retval = mbedtls_cipher_setkey( ctx, key, (int)keybits,
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MBEDTLS_ENCRYPT ) ) != 0 )
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return( retval );
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type = ctx->cipher_info->type;
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switch( type )
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{
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case MBEDTLS_CIPHER_AES_128_ECB:
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case MBEDTLS_CIPHER_AES_192_ECB:
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case MBEDTLS_CIPHER_AES_256_ECB:
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case MBEDTLS_CIPHER_DES_EDE3_ECB:
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break;
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default:
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return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
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}
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/* Allocated and initialise in the cipher context memory for the CMAC
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* context */
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cmac_ctx = mbedtls_calloc( 1, sizeof( mbedtls_cmac_context_t ) );
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if( cmac_ctx == NULL )
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return( MBEDTLS_ERR_CIPHER_ALLOC_FAILED );
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ctx->cmac_ctx = cmac_ctx;
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mbedtls_platform_zeroize( cmac_ctx->state, sizeof( cmac_ctx->state ) );
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return 0;
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}
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int mbedtls_cipher_cmac_update( mbedtls_cipher_context_t *ctx,
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const unsigned char *input, size_t ilen )
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{
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mbedtls_cmac_context_t* cmac_ctx;
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unsigned char *state;
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int ret = 0;
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size_t n, j, olen, block_size;
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if( ctx == NULL || ctx->cipher_info == NULL || input == NULL ||
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ctx->cmac_ctx == NULL )
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return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
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cmac_ctx = ctx->cmac_ctx;
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block_size = ctx->cipher_info->block_size;
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state = ctx->cmac_ctx->state;
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/* Is there data still to process from the last call, that's greater in
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* size than a block? */
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if( cmac_ctx->unprocessed_len > 0 &&
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ilen > block_size - cmac_ctx->unprocessed_len )
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{
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memcpy( &cmac_ctx->unprocessed_block[cmac_ctx->unprocessed_len],
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input,
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block_size - cmac_ctx->unprocessed_len );
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cmac_xor_block( state, cmac_ctx->unprocessed_block, state, block_size );
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if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state,
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&olen ) ) != 0 )
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{
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goto exit;
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}
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input += block_size - cmac_ctx->unprocessed_len;
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ilen -= block_size - cmac_ctx->unprocessed_len;
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cmac_ctx->unprocessed_len = 0;
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}
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/* n is the number of blocks including any final partial block */
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n = ( ilen + block_size - 1 ) / block_size;
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/* Iterate across the input data in block sized chunks, excluding any
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* final partial or complete block */
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for( j = 1; j < n; j++ )
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{
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cmac_xor_block( state, input, state, block_size );
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if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state,
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&olen ) ) != 0 )
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goto exit;
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ilen -= block_size;
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input += block_size;
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}
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/* If there is data left over that wasn't aligned to a block */
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if( ilen > 0 )
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{
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memcpy( &cmac_ctx->unprocessed_block[cmac_ctx->unprocessed_len],
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input,
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ilen );
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cmac_ctx->unprocessed_len += ilen;
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}
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exit:
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return( ret );
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}
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int mbedtls_cipher_cmac_finish( mbedtls_cipher_context_t *ctx,
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unsigned char *output )
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{
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mbedtls_cmac_context_t* cmac_ctx;
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unsigned char *state, *last_block;
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unsigned char K1[MBEDTLS_CIPHER_BLKSIZE_MAX];
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unsigned char K2[MBEDTLS_CIPHER_BLKSIZE_MAX];
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unsigned char M_last[MBEDTLS_CIPHER_BLKSIZE_MAX];
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t olen, block_size;
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if( ctx == NULL || ctx->cipher_info == NULL || ctx->cmac_ctx == NULL ||
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output == NULL )
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return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
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cmac_ctx = ctx->cmac_ctx;
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block_size = ctx->cipher_info->block_size;
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state = cmac_ctx->state;
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mbedtls_platform_zeroize( K1, sizeof( K1 ) );
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mbedtls_platform_zeroize( K2, sizeof( K2 ) );
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cmac_generate_subkeys( ctx, K1, K2 );
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last_block = cmac_ctx->unprocessed_block;
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/* Calculate last block */
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if( cmac_ctx->unprocessed_len < block_size )
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{
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cmac_pad( M_last, block_size, last_block, cmac_ctx->unprocessed_len );
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cmac_xor_block( M_last, M_last, K2, block_size );
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}
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else
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{
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/* Last block is complete block */
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cmac_xor_block( M_last, last_block, K1, block_size );
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}
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cmac_xor_block( state, M_last, state, block_size );
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if( ( ret = mbedtls_cipher_update( ctx, state, block_size, state,
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&olen ) ) != 0 )
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{
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goto exit;
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}
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memcpy( output, state, block_size );
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exit:
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/* Wipe the generated keys on the stack, and any other transients to avoid
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* side channel leakage */
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mbedtls_platform_zeroize( K1, sizeof( K1 ) );
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mbedtls_platform_zeroize( K2, sizeof( K2 ) );
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cmac_ctx->unprocessed_len = 0;
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mbedtls_platform_zeroize( cmac_ctx->unprocessed_block,
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sizeof( cmac_ctx->unprocessed_block ) );
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mbedtls_platform_zeroize( state, MBEDTLS_CIPHER_BLKSIZE_MAX );
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return( ret );
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}
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int mbedtls_cipher_cmac_reset( mbedtls_cipher_context_t *ctx )
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{
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mbedtls_cmac_context_t* cmac_ctx;
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if( ctx == NULL || ctx->cipher_info == NULL || ctx->cmac_ctx == NULL )
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return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
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cmac_ctx = ctx->cmac_ctx;
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/* Reset the internal state */
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cmac_ctx->unprocessed_len = 0;
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mbedtls_platform_zeroize( cmac_ctx->unprocessed_block,
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sizeof( cmac_ctx->unprocessed_block ) );
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mbedtls_platform_zeroize( cmac_ctx->state,
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sizeof( cmac_ctx->state ) );
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return( 0 );
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}
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int mbedtls_cipher_cmac( const mbedtls_cipher_info_t *cipher_info,
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const unsigned char *key, size_t keylen,
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const unsigned char *input, size_t ilen,
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unsigned char *output )
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{
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mbedtls_cipher_context_t ctx;
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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if( cipher_info == NULL || key == NULL || input == NULL || output == NULL )
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return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
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mbedtls_cipher_init( &ctx );
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if( ( ret = mbedtls_cipher_setup( &ctx, cipher_info ) ) != 0 )
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goto exit;
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ret = mbedtls_cipher_cmac_starts( &ctx, key, keylen );
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if( ret != 0 )
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goto exit;
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ret = mbedtls_cipher_cmac_update( &ctx, input, ilen );
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if( ret != 0 )
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goto exit;
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ret = mbedtls_cipher_cmac_finish( &ctx, output );
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exit:
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mbedtls_cipher_free( &ctx );
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return( ret );
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}
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#if defined(MBEDTLS_AES_C)
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/*
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* Implementation of AES-CMAC-PRF-128 defined in RFC 4615
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*/
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int mbedtls_aes_cmac_prf_128( const unsigned char *key, size_t key_length,
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const unsigned char *input, size_t in_len,
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unsigned char output[16] )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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const mbedtls_cipher_info_t *cipher_info;
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unsigned char zero_key[MBEDTLS_AES_BLOCK_SIZE];
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unsigned char int_key[MBEDTLS_AES_BLOCK_SIZE];
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if( key == NULL || input == NULL || output == NULL )
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return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
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cipher_info = mbedtls_cipher_info_from_type( MBEDTLS_CIPHER_AES_128_ECB );
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if( cipher_info == NULL )
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{
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/* Failing at this point must be due to a build issue */
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ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
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goto exit;
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}
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if( key_length == MBEDTLS_AES_BLOCK_SIZE )
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{
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/* Use key as is */
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memcpy( int_key, key, MBEDTLS_AES_BLOCK_SIZE );
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}
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else
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{
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memset( zero_key, 0, MBEDTLS_AES_BLOCK_SIZE );
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ret = mbedtls_cipher_cmac( cipher_info, zero_key, 128, key,
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key_length, int_key );
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if( ret != 0 )
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goto exit;
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}
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ret = mbedtls_cipher_cmac( cipher_info, int_key, 128, input, in_len,
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output );
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exit:
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mbedtls_platform_zeroize( int_key, sizeof( int_key ) );
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return( ret );
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}
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#endif /* MBEDTLS_AES_C */
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#endif /* !MBEDTLS_CMAC_ALT */
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|
|
|
#if defined(MBEDTLS_SELF_TEST)
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/*
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* CMAC test data for SP800-38B
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|
* http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/AES_CMAC.pdf
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|
* http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/TDES_CMAC.pdf
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|
*
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|
* AES-CMAC-PRF-128 test data from RFC 4615
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|
* https://tools.ietf.org/html/rfc4615#page-4
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|
*/
|
|
|
|
#define NB_CMAC_TESTS_PER_KEY 4
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#define NB_PRF_TESTS 3
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|
|
#if defined(MBEDTLS_AES_C) || defined(MBEDTLS_DES_C)
|
|
/* All CMAC test inputs are truncated from the same 64 byte buffer. */
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|
static const unsigned char test_message[] = {
|
|
/* PT */
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|
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
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0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
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0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c,
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0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
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0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
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0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
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0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17,
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0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10
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};
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#endif /* MBEDTLS_AES_C || MBEDTLS_DES_C */
|
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|
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#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 #%d: ", 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 )
|
|
{
|
|
/* When CMAC is implemented by an alternative implementation, or
|
|
* the underlying primitive itself is implemented alternatively,
|
|
* AES-192 may be unavailable. This should not cause the selftest
|
|
* function to fail. */
|
|
if( ( ret == MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED ||
|
|
ret == MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE ) &&
|
|
cipher_type == MBEDTLS_CIPHER_AES_192_ECB ) {
|
|
if( verbose != 0 )
|
|
mbedtls_printf( "skipped\n" );
|
|
goto next_test;
|
|
}
|
|
|
|
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" );
|
|
|
|
next_test:
|
|
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 #%d: ", testname, i + 1 );
|
|
|
|
if( ( ret = mbedtls_cipher_cmac( cipher_info, key, keybits, messages,
|
|
message_lengths[i], output ) ) != 0 )
|
|
{
|
|
/* When CMAC is implemented by an alternative implementation, or
|
|
* the underlying primitive itself is implemented alternatively,
|
|
* AES-192 may be unavailable. This should not cause the selftest
|
|
* function to fail. */
|
|
if( ( ret == MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED ||
|
|
ret == MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE ) &&
|
|
cipher_type == MBEDTLS_CIPHER_AES_192_ECB ) {
|
|
if( verbose != 0 )
|
|
mbedtls_printf( "skipped\n" );
|
|
continue;
|
|
}
|
|
|
|
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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
unsigned char output[MBEDTLS_AES_BLOCK_SIZE];
|
|
|
|
for( i = 0; i < NB_PRF_TESTS; i++ )
|
|
{
|
|
mbedtls_printf( " AES CMAC 128 PRF #%d: ", 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
|
|
#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 */
|