From b0c3c43dec60dd9442ee757d4b2fdbc44057de3a Mon Sep 17 00:00:00 2001 From: Brian Murray Date: Wed, 18 May 2016 14:29:51 -0700 Subject: [PATCH] CMAC support for cipher with 64bit blocks (DES/3DES) --- include/mbedtls/cmac.h | 10 +- library/cmac.c | 519 ++++++++++++++++++++++++++++++++++------- 2 files changed, 442 insertions(+), 87 deletions(-) diff --git a/include/mbedtls/cmac.h b/include/mbedtls/cmac.h index c2ae83be1..3e02f912e 100644 --- a/include/mbedtls/cmac.h +++ b/include/mbedtls/cmac.h @@ -37,8 +37,8 @@ extern "C" { */ typedef struct { mbedtls_cipher_context_t cipher_ctx; /*!< cipher context used */ - unsigned char K1[16]; - unsigned char K2[16]; + unsigned char* K1; + unsigned char* K2; } mbedtls_cmac_context; @@ -108,9 +108,8 @@ int mbedtls_cmac_verify( mbedtls_cmac_context *ctx, /** * \brief AES-CMAC-128-PRF - * TODO: add reference to the standard + * See RFC * - * \param ctx CMAC context * \param key PRF key * \param key_len PRF key length * \param input buffer holding the input data @@ -120,8 +119,7 @@ int mbedtls_cmac_verify( mbedtls_cmac_context *ctx, * * \return 0 if successful */ -int mbedtls_aes_cmac_prf_128( mbedtls_cmac_context *ctx, - const unsigned char *key, size_t key_len, +int mbedtls_aes_cmac_prf_128( const unsigned char *key, size_t key_len, const unsigned char *input, size_t in_len, unsigned char *tag ); diff --git a/library/cmac.c b/library/cmac.c index 23b8044ff..ab4a82ddf 100644 --- a/library/cmac.c +++ b/library/cmac.c @@ -60,24 +60,39 @@ void mbedtls_cmac_init( mbedtls_cmac_context *ctx ) } /* - * Multiply by u in GF(2^128) + * Multiplication by u in the Galois field of GF(2^n) * - * As explained in the paper, this can be achieved as + * As explained in the paper, this can computed: * If MSB(p) = 0, then p = (p << 1) - * If MSB(p) = 1, then p = (p << 1) ^ Rb - * with Rb = 0x87 + * 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 byes or 16 bytes. */ -static void cmac_multiply_by_u( unsigned char *output, - const unsigned char *input ) +static int cmac_multiply_by_u( unsigned char *output, + const unsigned char *input, + size_t blocksize) { - const unsigned char Rb = 0x87; /* block size 16 only */ - unsigned char mask; - unsigned char overflow = 0; - int i; - for( i = 15; i >= 0; i-- ) + const unsigned char R_128 = 0x87; + const unsigned char R_64 = 0x1B; + unsigned char R_n, mask; + unsigned char overflow = 0x00; + int i, starting_index; + + starting_index = blocksize -1; + + if(blocksize == 16){ + R_n = R_128; + } else if(blocksize == 8) { + R_n = R_64; + } else { + return MBEDTLS_ERR_CMAC_BAD_INPUT; + } + + + for( i = starting_index; i >= 0; i-- ) { output[i] = input[i] << 1 | overflow; overflow = input[i] >> 7; @@ -96,7 +111,8 @@ static void cmac_multiply_by_u( unsigned char *output, #pragma warning( pop ) #endif - output[15] ^= Rb & mask; + output[starting_index] ^= R_n & mask; + return 0; } /* @@ -104,27 +120,35 @@ static void cmac_multiply_by_u( unsigned char *output, */ static int cmac_generate_subkeys( mbedtls_cmac_context *ctx ) { - int ret; - unsigned char L[16]; - size_t olen; + int ret, keybytes; + unsigned char *L; + size_t olen, block_size; + + ret = 0; + block_size = ctx->cipher_ctx.cipher_info->block_size; + + L = mbedtls_calloc(block_size, sizeof(unsigned char)); /* Calculate Ek(0) */ - memset( L, 0, 16 ); + memset( L, 0, block_size ); if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, - L, 16, L, &olen ) ) != 0 ) + L, block_size, L, &olen ) ) != 0 ) { - return( ret ); + goto exit; } /* * Generate K1 and K2 */ - cmac_multiply_by_u( ctx->K1, L ); - cmac_multiply_by_u( ctx->K2, ctx->K1 ); + if( ( ret = cmac_multiply_by_u( ctx->K1, L , block_size) ) != 0 ) + goto exit; + if( ( cmac_multiply_by_u( ctx->K2, ctx->K1 , block_size) ) != 0 ) + goto exit; - mbedtls_zeroize( L, sizeof( L ) ); - - return( 0 ); + exit: + mbedtls_zeroize( L, sizeof( L ) ); + free(L); + return ret; } /* @@ -135,7 +159,7 @@ int mbedtls_cmac_setkey( mbedtls_cmac_context *ctx, const unsigned char *key, unsigned int keybits ) { - int ret; + int ret, blocksize; const mbedtls_cipher_info_t *cipher_info; cipher_info = mbedtls_cipher_info_from_values( cipher, keybits, @@ -143,8 +167,8 @@ int mbedtls_cmac_setkey( mbedtls_cmac_context *ctx, if( cipher_info == NULL ) return( MBEDTLS_ERR_CMAC_BAD_INPUT ); - if( cipher_info->block_size != 16 ) - return( MBEDTLS_ERR_CMAC_BAD_INPUT ); + ctx->K1 = mbedtls_calloc( cipher_info->block_size, sizeof( unsigned char ) ); + ctx->K2 = mbedtls_calloc( cipher_info->block_size, sizeof( unsigned char ) ); mbedtls_cipher_free( &ctx->cipher_ctx ); @@ -165,8 +189,15 @@ int mbedtls_cmac_setkey( mbedtls_cmac_context *ctx, */ void mbedtls_cmac_free( mbedtls_cmac_context *ctx ) { + int block_size; + block_size = ctx->cipher_ctx.cipher_info->block_size; + mbedtls_cipher_free( &ctx->cipher_ctx ); - mbedtls_zeroize( ctx, sizeof( mbedtls_cmac_context ) ); + + mbedtls_zeroize(ctx->K1, block_size * sizeof( unsigned char ) ); + mbedtls_zeroize(ctx->K2, block_size * sizeof( unsigned char ) ); + mbedtls_free( ctx->K1 ); + mbedtls_free( ctx->K2 ); } /* @@ -176,16 +207,17 @@ void mbedtls_cmac_free( mbedtls_cmac_context *ctx ) * 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[16], + size_t padded_block_len, const unsigned char *last_block, - size_t length ) + size_t last_block_len ) { size_t j; - for( j = 0; j < 16; j++ ) + for( j = 0; j < padded_block_len; j++ ) { - if( j < length ) + if( j < last_block_len ) padded_block[j] = last_block[j]; - else if( j == length ) + else if( j == last_block_len ) padded_block[j] = 0x80; else padded_block[j] = 0x00; @@ -193,11 +225,11 @@ static void cmac_pad( unsigned char padded_block[16], } /* - * XOR 128-bit + * XOR Block * Here, macro results in smaller compiled code than static inline function */ -#define XOR_128( o, i1, i2 ) \ - for( i = 0; i < 16; i++ ) \ +#define XOR_BLOCK( o, i1, i2 ) \ + for( i = 0; i < block_size; i++ ) \ ( o )[i] = ( i1 )[i] ^ ( i2 )[i]; /* @@ -205,9 +237,10 @@ static void cmac_pad( unsigned char padded_block[16], */ #define UPDATE_CMAC( x ) \ do { \ - XOR_128( state, ( x ), state ); \ + XOR_BLOCK( state, ( x ), state ); \ if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, \ - state, 16, state, &olen ) ) != 0 ) \ + state, block_size, \ + state, &olen ) ) != 0 ) \ return( ret ); \ } while( 0 ) @@ -219,50 +252,61 @@ int mbedtls_cmac_generate( mbedtls_cmac_context *ctx, unsigned char *tag, size_t tag_len ) { - unsigned char state[16]; - unsigned char M_last[16]; + + unsigned char *state; + unsigned char *M_last; int n, i, j, ret, needs_padding; - size_t olen; + size_t olen, block_size; + + + ret = 0; + block_size = ctx->cipher_ctx.cipher_info->block_size; + + state = mbedtls_calloc(block_size, sizeof(unsigned char) ); + M_last = mbedtls_calloc(block_size, sizeof(unsigned char) ); /* * Check in_len requirements: SP800-38B A * 4 is a worst case bottom limit */ - if( tag_len < 4 || tag_len > 16 || tag_len % 2 != 0 ) + if( tag_len < 4 || tag_len > block_size || tag_len % 2 != 0 ) return( MBEDTLS_ERR_CMAC_BAD_INPUT ); if( in_len == 0 ) needs_padding = 1; else - needs_padding = in_len % 16 != 0; + needs_padding = in_len % block_size != 0; - n = in_len / 16 + needs_padding; + n = in_len / block_size + needs_padding; /* Calculate last block */ if( needs_padding ) { - cmac_pad( M_last, input + 16 * ( n - 1 ), in_len % 16 ); - XOR_128( M_last, M_last, ctx->K2 ); + cmac_pad( M_last, block_size, input + block_size * ( n - 1 ), in_len % block_size ); + XOR_BLOCK( M_last, M_last, ctx->K2 ); } else { /* Last block is complete block */ - XOR_128( M_last, input + 16 * ( n - 1 ), ctx->K1 ); + XOR_BLOCK( M_last, input + block_size * ( n - 1 ), ctx->K1 ); } - memset( state, 0, 16 ); + memset( state, 0, block_size ); for( j = 0; j < n - 1; j++ ) - UPDATE_CMAC( input + 16 * j ); + UPDATE_CMAC( input + block_size * j ); UPDATE_CMAC( M_last ); - memcpy( tag, state, 16 ); + memcpy( tag, state, block_size ); - return( 0 ); + exit: + free(state); + free(M_last); + return( ret ); } -#undef XOR_128 +#undef XOR_BLOCK #undef UPDATE_CMAC /* @@ -273,14 +317,17 @@ int mbedtls_cmac_verify( mbedtls_cmac_context *ctx, const unsigned char *tag, size_t tag_len ) { int ret; - unsigned char check_tag[16]; + unsigned char *check_tag; unsigned char i; int diff; + check_tag = mbedtls_calloc(ctx->cipher_ctx.cipher_info->block_size, + sizeof(unsigned char) ); + if( ( ret = mbedtls_cmac_generate( ctx, input, in_len, check_tag, tag_len ) ) != 0 ) { - return ret; + goto exit; } /* Check tag in "constant-time" */ @@ -288,25 +335,29 @@ int mbedtls_cmac_verify( mbedtls_cmac_context *ctx, diff |= tag[i] ^ check_tag[i]; if( diff != 0 ) - return( MBEDTLS_ERR_CMAC_VERIFY_FAILED ); + ret = MBEDTLS_ERR_CMAC_VERIFY_FAILED; + goto exit; - return( 0 ); + exit: + free(check_tag); + return ret; } /* * PRF based on CMAC with AES-128 - * TODO: add reference to the standard - * TODO: do we need to take a cmac_context as an argument here? + * See RFC 4615 */ -int mbedtls_aes_cmac_prf_128( mbedtls_cmac_context *ctx, - const unsigned char *key, size_t key_length, +int mbedtls_aes_cmac_prf_128( const unsigned char *key, size_t key_length, const unsigned char *input, size_t in_len, unsigned char *tag ) { int ret; + mbedtls_cmac_context ctx; unsigned char zero_key[16]; unsigned char int_key[16]; + mbedtls_cmac_init(&ctx); + if( key_length == 16 ) { /* Use key as is */ @@ -322,21 +373,27 @@ int mbedtls_aes_cmac_prf_128( mbedtls_cmac_context *ctx, ret = mbedtls_cmac_setkey( &zero_ctx, MBEDTLS_CIPHER_ID_AES, zero_key, 8 * sizeof zero_key ); if( ret != 0 ) - return( ret ); + goto exit; ret = mbedtls_cmac_generate( &zero_ctx, key, key_length, int_key, 16 ); if( ret != 0 ) - return( ret ); + goto exit; } - ret = mbedtls_cmac_setkey( ctx, MBEDTLS_CIPHER_ID_AES, + ret = mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, int_key, 8 * sizeof int_key ); if( ret != 0 ) - return( ret ); + goto exit; mbedtls_zeroize( int_key, sizeof( int_key ) ); - return( mbedtls_cmac_generate( ctx, input, in_len, tag, 16 ) ); + ret = mbedtls_cmac_generate( &ctx, input, in_len, tag, 16 ); + + exit: + mbedtls_cmac_free(&ctx); + return( ret ); + + } #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C) @@ -345,30 +402,116 @@ int mbedtls_aes_cmac_prf_128( mbedtls_cmac_context *ctx, * http://csrc.nist.gov/publications/nistpubs/800-38B/Updated_CMAC_Examples.pdf */ -#define NB_CMAC_TESTS 4 +#define NB_CMAC_TESTS_AES_128 4 +#define NB_CMAC_TESTS_AES_192 4 +#define NB_CMAC_TESTS_AES_256 4 +#define NB_CMAC_TESTS_3DES 4 + #define NB_PRF_TESTS 3 -/* Key */ -static const unsigned char key[] = { +/* AES 128 Key */ +static const unsigned char aes_128_key[] = { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }; +/* AES 192 Key */ +static const unsigned char aes_192_key[] = { + 0x8e, 0x73, 0xb0, 0xf7, 0xda, 0x0e, 0x64, 0x52, + 0xc8, 0x10, 0xf3, 0x2b, 0x80, 0x90, 0x79, 0xe5, + 0x62, 0xf8, 0xea, 0xd2, 0x52, 0x2c, 0x6b, 0x7b +}; + +/* AES 256 Key */ +static const unsigned char aes_256_key[] = { + 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 +}; + +/* 3DES 112 bit key */ +static const unsigned char des3_2key_key[] = { + 0x4c, 0xf1, 0x51, 0x34, 0xa2, 0x85, 0x0d, 0xd5, + 0x8a, 0x3d, 0x10, 0xba, 0x80, 0x57, 0x0d, 0x38, + 0x4c, 0xf1, 0x51, 0x34, 0xa2, 0x85, 0x0d, 0xd5 +}; + +/* 3DES 168 bit key */ +static const unsigned char des3_3key_key[] = { + 0x8a, 0xa8, 0x3b, 0xf8, 0xcb, 0xda, 0x10, 0x62, + 0x0b, 0xc1, 0xbf, 0x19, 0xfb, 0xb6, 0xcd, 0x58, + 0xbc, 0x31, 0x3d, 0x4a, 0x37, 0x1c, 0xa8, 0xb5 +}; + + + /* Assume we don't need to test Ek0 as this is a function of the cipher */ /* Subkey K1 */ -static const unsigned char K1[] = { +static const unsigned char aes_128_k1[] = { 0xfb, 0xee, 0xd6, 0x18, 0x35, 0x71, 0x33, 0x66, 0x7c, 0x85, 0xe0, 0x8f, 0x72, 0x36, 0xa8, 0xde }; /* Subkey K2 */ -static const unsigned char K2[] = { +static const unsigned char aes_128_k2[] = { 0xf7, 0xdd, 0xac, 0x30, 0x6a, 0xe2, 0x66, 0xcc, 0xf9, 0x0b, 0xc1, 0x1e, 0xe4, 0x6d, 0x51, 0x3b }; -/* All Messages */ + + +/* Subkey K1 */ +static const unsigned char aes_192_k1[] = { + 0x44, 0x8a, 0x5b, 0x1c, 0x93, 0x51, 0x4b, 0x27, + 0x3e, 0xe6, 0x43, 0x9d, 0xd4, 0xda, 0xa2, 0x96 +}; + +/* Subkey K2 */ +static const unsigned char aes_192_k2[] = { + 0x89, 0x14, 0xb6, 0x39, 0x26, 0xa2, 0x96, 0x4e, + 0x7d, 0xcc, 0x87, 0x3b, 0xa9, 0xb5, 0x45, 0x2c +}; + +/* Subkey K1 */ +static const unsigned char aes_256_k1[] = { + 0xca, 0xd1, 0xed, 0x03, 0x29, 0x9e, 0xed, 0xac, + 0x2e, 0x9a, 0x99, 0x80, 0x86, 0x21, 0x50, 0x2f +}; + +/* Subkey K2 */ +static const unsigned char aes_256_k2[] = { + 0x95, 0xa3, 0xda, 0x06, 0x53, 0x3d, 0xdb, 0x58, + 0x5d, 0x35, 0x33, 0x01, 0x0c, 0x42, 0xa0, 0xd9 +}; + + +/* Subkey K1 */ +static const unsigned char des3_2key_k1[] = { + 0x8e, 0xcf, 0x37, 0x3e, 0xd7, 0x1a, 0xfa, 0xef +}; + +/* Subkey K2 */ +static const unsigned char des3_2key_k2[] = { + 0x1d, 0x9e, 0x6e, 0x7d, 0xae, 0x35, 0xf5, 0xc5 +}; + +/* Subkey K1 */ +static const unsigned char des3_3key_k1[] = { + 0x91, 0x98, 0xe9, 0xd3, 0x14, 0xe6, 0x53, 0x5f +}; + +/* Subkey K2 */ +static const unsigned char des3_3key_k2[] = { + 0x23, 0x31, 0xd3, 0xa6, 0x29, 0xcc, 0xa6, 0xa5 +}; + +/* Assume we don't need to test Ek0 as this is a function of the cipher */ + + + +/* All Messages are the same. The difference is the length */ static const unsigned char M[] = { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a, @@ -380,7 +523,7 @@ static const unsigned char M[] = { 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10 }; -static const unsigned char T[NB_CMAC_TESTS][16] = { +static const unsigned char T_128[NB_CMAC_TESTS_3DES][16] = { { 0xbb, 0x1d, 0x69, 0x29, 0xe9, 0x59, 0x37, 0x28, 0x7f, 0xa3, 0x7d, 0x12, 0x9b, 0x75, 0x67, 0x46 @@ -400,13 +543,91 @@ static const unsigned char T[NB_CMAC_TESTS][16] = { }; /* Sizes in bytes */ -static const size_t Mlen[NB_CMAC_TESTS] = { +static const size_t Mlen[NB_CMAC_TESTS_AES_192] = { 0, 16, 40, 64 }; +static const size_t Mlen_3des[NB_CMAC_TESTS_AES_192] = { + 0, + 8, + 20, + 32 +}; + + + +static const unsigned char T_256[NB_CMAC_TESTS_AES_192][16] = { + { + 0x02, 0x89, 0x62, 0xf6, 0x1b, 0x7b, 0xf8, 0x9e, + 0xfc, 0x6b, 0x55, 0x1f, 0x46, 0x67, 0xd9, 0x83 + }, + { + 0x28, 0xa7, 0x02, 0x3f, 0x45, 0x2e, 0x8f, 0x82, + 0xbd, 0x4b, 0xf2, 0x8d, 0x8c, 0x37, 0xc3, 0x5c + }, + { + 0xaa, 0xf3, 0xd8, 0xf1, 0xde, 0x56, 0x40, 0xc2, + 0x32, 0xf5, 0xb1, 0x69, 0xb9, 0xc9, 0x11, 0xe6 + }, + { + 0xe1, 0x99, 0x21, 0x90, 0x54, 0x9f, 0x6e, 0xd5, + 0x69, 0x6a, 0x2c, 0x05, 0x6c, 0x31, 0x54, 0x10 + } +}; + +static const unsigned char T_192[NB_CMAC_TESTS_AES_192][16] = { + { + 0xd1, 0x7d, 0xdf, 0x46, 0xad, 0xaa, 0xcd, 0xe5, + 0x31, 0xca, 0xc4, 0x83, 0xde, 0x7a, 0x93, 0x67 + }, + { + 0x9e, 0x99, 0xa7, 0xbf, 0x31, 0xe7, 0x10, 0x90, + 0x06, 0x62, 0xf6, 0x5e, 0x61, 0x7c, 0x51, 0x84 + }, + { + 0x8a, 0x1d, 0xe5, 0xbe, 0x2e, 0xb3, 0x1a, 0xad, + 0x08, 0x9a, 0x82, 0xe6, 0xee, 0x90, 0x8b, 0x0e + }, + { + 0xa1, 0xd5, 0xdf, 0x0e, 0xed, 0x79, 0x0f, 0x79, + 0x4d, 0x77, 0x58, 0x96, 0x59, 0xf3, 0x9a, 0x11 + } +}; + +static const unsigned char T_3des_2key[NB_CMAC_TESTS_AES_192][16] = { + { + 0xbd, 0x2e, 0xbf, 0x9a, 0x3b, 0xa0, 0x03, 0x61 + }, + { + 0x4f, 0xf2, 0xab, 0x81, 0x3c, 0x53, 0xce, 0x83 + }, + { + 0x62, 0xdd, 0x1b, 0x47, 0x19, 0x02, 0xbd, 0x4e + }, + { + 0x31, 0xb1, 0xe4, 0x31, 0xda, 0xbc, 0x4e, 0xb8 + } +}; + +static const unsigned char T_3des_3key[NB_CMAC_TESTS_AES_192][16] = { + { + 0xb7, 0xa6, 0x88, 0xe1, 0x22, 0xff, 0xaf, 0x95 + }, + { + 0x8e, 0x8f, 0x29, 0x31, 0x36, 0x28, 0x37, 0x97 + }, + { + 0x74, 0x3d, 0xdb, 0xe0, 0xce, 0x2d, 0xc2, 0xed + }, + { + 0x33, 0xe6, 0xb1, 0x09, 0x24, 0x00, 0xea, 0xe5 + } +}; + + /* PRF K */ static const unsigned char PRFK[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, @@ -453,7 +674,8 @@ int mbedtls_cmac_self_test( int verbose ) mbedtls_cmac_init( &ctx ); - if( mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, key, 8 * sizeof key ) != 0 ) + // AES 128 bit key + if( mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, aes_128_key, 8 * sizeof(aes_128_key) ) != 0 ) { if( verbose != 0 ) mbedtls_printf( " CMAC: setup failed\n" ); @@ -461,8 +683,8 @@ int mbedtls_cmac_self_test( int verbose ) return( 1 ); } - if( ( memcmp( ctx.K1, K1, 16 ) != 0 ) || - ( memcmp( ctx.K2, K2, 16 ) != 0 ) ) + if( ( memcmp( ctx.K1, aes_128_k1, 16 ) != 0 ) || + ( memcmp( ctx.K2, aes_128_k2, 16 ) != 0 ) ) { if( verbose != 0 ) mbedtls_printf( " CMAC: subkey generation failed\n" ); @@ -470,13 +692,13 @@ int mbedtls_cmac_self_test( int verbose ) return( 1 ); } - for( i = 0; i < NB_CMAC_TESTS; i++ ) + for( i = 0; i < NB_CMAC_TESTS_AES_128; i++ ) { mbedtls_printf( " AES-128-CMAC #%u: ", i ); ret = mbedtls_cmac_generate( &ctx, M, Mlen[i], tag, 16 ); if( ret != 0 || - memcmp( tag, T[i], 16 ) != 0 ) + memcmp( tag, T_128[i], 16 ) != 0 ) { if( verbose != 0 ) mbedtls_printf( "failed\n" ); @@ -484,7 +706,7 @@ int mbedtls_cmac_self_test( int verbose ) return( 1 ); } - ret = mbedtls_cmac_verify( &ctx, M, Mlen[i], T[i], 16 ); + ret = mbedtls_cmac_verify( &ctx, M, Mlen[i], T_128[i], 16 ); if( ret != 0 ) { if( verbose != 0 ) @@ -497,14 +719,130 @@ int mbedtls_cmac_self_test( int verbose ) mbedtls_printf( "passed\n" ); } - for( i = 0; i < NB_PRF_TESTS; i++ ) + // AES 192 bit key + if( mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, aes_192_key, 8 * sizeof(aes_192_key) ) != 0 ) { - mbedtls_printf( " AES-CMAC-128-PRF #%u: ", i ); + if( verbose != 0 ) + mbedtls_printf( " CMAC: setup failed\n" ); - mbedtls_aes_cmac_prf_128( &ctx, PRFK, PRFKlen[i], PRFM, 20, tag ); + return( 1 ); + } + if( ( memcmp( ctx.K1, aes_192_k1, 16 ) != 0 ) || + ( memcmp( ctx.K2, aes_192_k2, 16 ) != 0 ) ) + { + if( verbose != 0 ) + mbedtls_printf( " CMAC: subkey generation failed\n" ); + + return( 1 ); + } + + for( i = 0; i < NB_CMAC_TESTS_AES_192; i++ ) + { + mbedtls_printf( " AES-192-CMAC #%u: ", i ); + + ret = mbedtls_cmac_generate( &ctx, M, Mlen[i], tag, 16 ); if( ret != 0 || - memcmp( tag, PRFT[i], 16 ) != 0 ) + memcmp( tag, T_192[i], 16 ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + return( 1 ); + } + + ret = mbedtls_cmac_verify( &ctx, M, Mlen[i], T_192[i], 16 ); + if( ret != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + return( 1 ); + } + + if( verbose != 0 ) + mbedtls_printf( "passed\n" ); + } + + // 3DES 2 key bit key + if( (ret = mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_3DES, des3_2key_key, 8 * sizeof(des3_2key_key) )) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( " CMAC: setup failed %i\n", ret); + + return( 1 ); + } + + if( ( memcmp( ctx.K1, des3_2key_k1, 8 ) != 0 ) || + ( memcmp( ctx.K2, des3_2key_k2, 8 ) != 0 ) ) + { + if( verbose != 0 ) + mbedtls_printf( " CMAC: subkey generation failed\n" ); + + return( 1 ); + } + + for( i = 0; i < NB_CMAC_TESTS_3DES; i++ ) + { + mbedtls_printf( " DES-112-CMAC #%u: ", i ); + + ret = mbedtls_cmac_generate( &ctx, M, Mlen_3des[i], tag, 8 ); + if( ret != 0 || + memcmp( tag, T_3des_2key[i], 8 ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + return( 1 ); + } + + ret = mbedtls_cmac_verify( &ctx, M, Mlen_3des[i], T_3des_2key[i], 8 ); + if( ret != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + return( 1 ); + } + + if( verbose != 0 ) + mbedtls_printf( "passed\n" ); + } + + // 3DES 3 key + if( (ret = mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_3DES, des3_3key_key, 8 * sizeof(des3_3key_key) )) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( " CMAC: setup failed %i\n", ret); + + return( 1 ); + } + + if( ( memcmp( ctx.K1, des3_3key_k1, 8 ) != 0 ) || + ( memcmp( ctx.K2, des3_3key_k2, 8 ) != 0 ) ) + { + if( verbose != 0 ) + mbedtls_printf( " CMAC: subkey generation failed\n" ); + + return( 1 ); + } + + for( i = 0; i < NB_CMAC_TESTS_3DES; i++ ) + { + mbedtls_printf( " DES-168-CMAC #%u: ", i ); + + ret = mbedtls_cmac_generate( &ctx, M, Mlen_3des[i], tag, 8 ); + if( ret != 0 || + memcmp( tag, T_3des_3key[i], 8 ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + return( 1 ); + } + + ret = mbedtls_cmac_verify( &ctx, M, Mlen_3des[i], T_3des_3key[i], 8 ); + if( ret != 0 ) { if( verbose != 0 ) mbedtls_printf( "failed\n" ); @@ -518,6 +856,25 @@ int mbedtls_cmac_self_test( int verbose ) mbedtls_cmac_free( &ctx ); + for( i = 0; i < NB_PRF_TESTS; i++ ) + { + mbedtls_printf( " AES-CMAC-128-PRF #%u: ", i ); + + mbedtls_aes_cmac_prf_128( PRFK, PRFKlen[i], PRFM, 20, tag ); + + if( ret != 0 || + memcmp( tag, PRFT[i], 16 ) != 0 ) + { + if( verbose != 0 ) + mbedtls_printf( "failed\n" ); + + return( 1 ); + } else if( verbose != 0 ) + { + mbedtls_printf( "passed\n" ); + } + } + if( verbose != 0 ) mbedtls_printf( "\n" );