Fixed CMAC tag length
This commit is contained in:
Brian Murray
Simon Butcher
parent
f13d3db373
commit
00dc5f0fc8
1 changed files with 168 additions and 245 deletions
413
library/cmac.c
413
library/cmac.c
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@ -59,6 +59,7 @@ void mbedtls_cmac_init( mbedtls_cmac_context *ctx )
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memset( ctx, 0, sizeof( mbedtls_cmac_context ) );
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}
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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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@ -298,7 +299,7 @@ int mbedtls_cmac_generate( mbedtls_cmac_context *ctx,
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UPDATE_CMAC( M_last );
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memcpy( tag, state, block_size );
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memcpy( tag, state, tag_len );
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exit:
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free(state);
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@ -444,74 +445,59 @@ static const unsigned char des3_3key_key[] = {
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0xbc, 0x31, 0x3d, 0x4a, 0x37, 0x1c, 0xa8, 0xb5
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};
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/* Assume we don't need to test Ek0 as this is a function of the cipher */
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/* Subkey K1 */
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static const unsigned char aes_128_k1[] = {
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0xfb, 0xee, 0xd6, 0x18, 0x35, 0x71, 0x33, 0x66,
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0x7c, 0x85, 0xe0, 0x8f, 0x72, 0x36, 0xa8, 0xde
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static const unsigned char aes_128_subkeys[2][16] = {
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{
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0xfb, 0xee, 0xd6, 0x18, 0x35, 0x71, 0x33, 0x66,
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0x7c, 0x85, 0xe0, 0x8f, 0x72, 0x36, 0xa8, 0xde
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},
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{
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0xf7, 0xdd, 0xac, 0x30, 0x6a, 0xe2, 0x66, 0xcc,
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0xf9, 0x0b, 0xc1, 0x1e, 0xe4, 0x6d, 0x51, 0x3b
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}
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};
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/* Subkey K2 */
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static const unsigned char aes_128_k2[] = {
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0xf7, 0xdd, 0xac, 0x30, 0x6a, 0xe2, 0x66, 0xcc,
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0xf9, 0x0b, 0xc1, 0x1e, 0xe4, 0x6d, 0x51, 0x3b
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static const unsigned char aes_192_subkeys[2][16] = {
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{
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0x44, 0x8a, 0x5b, 0x1c, 0x93, 0x51, 0x4b, 0x27,
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0x3e, 0xe6, 0x43, 0x9d, 0xd4, 0xda, 0xa2, 0x96
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},
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{
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0x89, 0x14, 0xb6, 0x39, 0x26, 0xa2, 0x96, 0x4e,
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0x7d, 0xcc, 0x87, 0x3b, 0xa9, 0xb5, 0x45, 0x2c
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}
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};
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static const unsigned char aes_256_subkeys[2][16] = {
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{
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0xca, 0xd1, 0xed, 0x03, 0x29, 0x9e, 0xed, 0xac,
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0x2e, 0x9a, 0x99, 0x80, 0x86, 0x21, 0x50, 0x2f
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},
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{
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0x95, 0xa3, 0xda, 0x06, 0x53, 0x3d, 0xdb, 0x58,
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0x5d, 0x35, 0x33, 0x01, 0x0c, 0x42, 0xa0, 0xd9
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}
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};
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static const unsigned char des3_2key_subkeys[2][8] = {
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{
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0x8e, 0xcf, 0x37, 0x3e, 0xd7, 0x1a, 0xfa, 0xef
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},
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{
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0x1d, 0x9e, 0x6e, 0x7d, 0xae, 0x35, 0xf5, 0xc5
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}
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};
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static const unsigned char des3_3key_subkeys[2][8] = {
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{
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0x91, 0x98, 0xe9, 0xd3, 0x14, 0xe6, 0x53, 0x5f
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},
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{
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0x23, 0x31, 0xd3, 0xa6, 0x29, 0xcc, 0xa6, 0xa5
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}
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};
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/* Subkey K1 */
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static const unsigned char aes_192_k1[] = {
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0x44, 0x8a, 0x5b, 0x1c, 0x93, 0x51, 0x4b, 0x27,
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0x3e, 0xe6, 0x43, 0x9d, 0xd4, 0xda, 0xa2, 0x96
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};
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/* Subkey K2 */
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static const unsigned char aes_192_k2[] = {
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0x89, 0x14, 0xb6, 0x39, 0x26, 0xa2, 0x96, 0x4e,
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0x7d, 0xcc, 0x87, 0x3b, 0xa9, 0xb5, 0x45, 0x2c
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};
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/* Subkey K1 */
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static const unsigned char aes_256_k1[] = {
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0xca, 0xd1, 0xed, 0x03, 0x29, 0x9e, 0xed, 0xac,
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0x2e, 0x9a, 0x99, 0x80, 0x86, 0x21, 0x50, 0x2f
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};
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/* Subkey K2 */
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static const unsigned char aes_256_k2[] = {
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0x95, 0xa3, 0xda, 0x06, 0x53, 0x3d, 0xdb, 0x58,
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0x5d, 0x35, 0x33, 0x01, 0x0c, 0x42, 0xa0, 0xd9
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};
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/* Subkey K1 */
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static const unsigned char des3_2key_k1[] = {
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0x8e, 0xcf, 0x37, 0x3e, 0xd7, 0x1a, 0xfa, 0xef
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};
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/* Subkey K2 */
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static const unsigned char des3_2key_k2[] = {
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0x1d, 0x9e, 0x6e, 0x7d, 0xae, 0x35, 0xf5, 0xc5
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};
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/* Subkey K1 */
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static const unsigned char des3_3key_k1[] = {
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0x91, 0x98, 0xe9, 0xd3, 0x14, 0xe6, 0x53, 0x5f
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};
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/* Subkey K2 */
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static const unsigned char des3_3key_k2[] = {
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0x23, 0x31, 0xd3, 0xa6, 0x29, 0xcc, 0xa6, 0xa5
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};
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/* Assume we don't need to test Ek0 as this is a function of the cipher */
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/* All Messages are the same. The difference is the length */
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/* All Messages are truncated from the same 64 byte buffer. */
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static const unsigned char M[] = {
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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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@ -597,7 +583,7 @@ static const unsigned char T_192[NB_CMAC_TESTS_AES_192][16] = {
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}
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};
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static const unsigned char T_3des_2key[NB_CMAC_TESTS_AES_192][16] = {
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static const unsigned char T_3des_2key[4][8] = {
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{
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0xbd, 0x2e, 0xbf, 0x9a, 0x3b, 0xa0, 0x03, 0x61
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},
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@ -612,7 +598,7 @@ static const unsigned char T_3des_2key[NB_CMAC_TESTS_AES_192][16] = {
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}
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};
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static const unsigned char T_3des_3key[NB_CMAC_TESTS_AES_192][16] = {
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static const unsigned char T_3des_3key[4][8] = {
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{
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0xb7, 0xa6, 0x88, 0xe1, 0x22, 0xff, 0xaf, 0x95
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},
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@ -664,6 +650,71 @@ static const unsigned char PRFT[NB_PRF_TESTS][16] = {
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}
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};
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int test_cmac_with_cipher(int verbose,
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const unsigned char* testname,
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const unsigned char* key,
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int keybits,
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const unsigned char* messages,
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size_t message_lengths[4],
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const unsigned char* subkeys,
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const unsigned char* expected_result,
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mbedtls_cipher_id_t cipher_id,
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int block_size)
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{
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const int num_tests = 4;
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mbedtls_cmac_context ctx;
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int i, ret;
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unsigned char* tag;
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tag = mbedtls_calloc( block_size, sizeof( unsigned char ) );
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mbedtls_cmac_init( &ctx );
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if( ( ret = mbedtls_cmac_setkey( &ctx, cipher_id, key, keybits ) ) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: setup failed\n" );
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goto exit;
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}
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if( ( ret = memcmp( ctx.K1, subkeys, block_size ) != 0 ) ||
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( ret = memcmp( ctx.K2, &subkeys[block_size], block_size ) != 0 ) )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: subkey generation failed\n" );
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goto exit;
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}
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for( i = 0; i < num_tests; i++ )
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{
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if( verbose != 0 )
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mbedtls_printf( " %s CMAC #%u: ", testname, i +1 );
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if( ( ret = mbedtls_cmac_generate( &ctx, messages, message_lengths[i], tag, block_size ) ) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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goto exit;
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}
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if( ( ret = memcmp( tag, &expected_result[i * block_size], block_size ) ) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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goto exit;
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}
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if( ( ret = mbedtls_cmac_verify( &ctx, messages, message_lengths[i], &expected_result[i * block_size], block_size ) != 0 ) )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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goto exit;
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}
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mbedtls_printf( "passed\n" );
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}
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exit:
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free( tag );
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mbedtls_cmac_free( &ctx );
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return( ret );
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}
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int mbedtls_cmac_self_test( int verbose )
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{
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@ -672,189 +723,61 @@ int mbedtls_cmac_self_test( int verbose )
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int i;
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int ret;
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mbedtls_cmac_init( &ctx );
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test_cmac_with_cipher(verbose,
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"AES 128",
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aes_128_key,
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128,
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M,
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Mlen,
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aes_128_subkeys,
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T_128,
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MBEDTLS_CIPHER_ID_AES,
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16 );
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// AES 128 bit key
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if( mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, aes_128_key, 8 * sizeof(aes_128_key) ) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: setup failed\n" );
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test_cmac_with_cipher(verbose,
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"AES 192",
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aes_192_key,
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192,
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M,
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Mlen,
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aes_192_subkeys,
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T_192,
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MBEDTLS_CIPHER_ID_AES,
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16 );
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return( 1 );
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}
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test_cmac_with_cipher(verbose,
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"AES 256",
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aes_256_key,
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256,
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M,
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Mlen,
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aes_256_subkeys,
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T_256,
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MBEDTLS_CIPHER_ID_AES,
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16 );
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if( ( memcmp( ctx.K1, aes_128_k1, 16 ) != 0 ) ||
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( memcmp( ctx.K2, aes_128_k2, 16 ) != 0 ) )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: subkey generation failed\n" );
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test_cmac_with_cipher(verbose,
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"3DES 2 key",
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des3_2key_key,
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192,
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M,
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Mlen_3des,
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des3_2key_subkeys,
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T_3des_2key,
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MBEDTLS_CIPHER_ID_3DES,
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8 );
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return( 1 );
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}
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test_cmac_with_cipher(verbose,
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"3DES 3 key",
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des3_3key_key,
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192,
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M,
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Mlen_3des,
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des3_3key_subkeys,
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T_3des_3key,
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MBEDTLS_CIPHER_ID_3DES,
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8 );
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for( i = 0; i < NB_CMAC_TESTS_AES_128; i++ )
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{
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mbedtls_printf( " AES-128-CMAC #%u: ", i );
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ret = mbedtls_cmac_generate( &ctx, M, Mlen[i], tag, 16 );
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if( ret != 0 ||
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memcmp( tag, T_128[i], 16 ) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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return( 1 );
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}
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ret = mbedtls_cmac_verify( &ctx, M, Mlen[i], T_128[i], 16 );
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if( ret != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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return( 1 );
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}
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if( verbose != 0 )
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mbedtls_printf( "passed\n" );
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}
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// AES 192 bit key
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if( mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, aes_192_key, 8 * sizeof(aes_192_key) ) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: setup failed\n" );
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return( 1 );
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}
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if( ( memcmp( ctx.K1, aes_192_k1, 16 ) != 0 ) ||
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( memcmp( ctx.K2, aes_192_k2, 16 ) != 0 ) )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: subkey generation failed\n" );
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return( 1 );
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}
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for( i = 0; i < NB_CMAC_TESTS_AES_192; i++ )
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{
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mbedtls_printf( " AES-192-CMAC #%u: ", i );
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ret = mbedtls_cmac_generate( &ctx, M, Mlen[i], tag, 16 );
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if( ret != 0 ||
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memcmp( tag, T_192[i], 16 ) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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return( 1 );
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}
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ret = mbedtls_cmac_verify( &ctx, M, Mlen[i], T_192[i], 16 );
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if( ret != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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return( 1 );
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}
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if( verbose != 0 )
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mbedtls_printf( "passed\n" );
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}
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// 3DES 2 key bit key
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if( (ret = mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_3DES, des3_2key_key, 8 * sizeof(des3_2key_key) )) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: setup failed %i\n", ret);
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return( 1 );
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}
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if( ( memcmp( ctx.K1, des3_2key_k1, 8 ) != 0 ) ||
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( memcmp( ctx.K2, des3_2key_k2, 8 ) != 0 ) )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: subkey generation failed\n" );
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return( 1 );
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}
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for( i = 0; i < NB_CMAC_TESTS_3DES; i++ )
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{
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mbedtls_printf( " DES-112-CMAC #%u: ", i );
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ret = mbedtls_cmac_generate( &ctx, M, Mlen_3des[i], tag, 8 );
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if( ret != 0 ||
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memcmp( tag, T_3des_2key[i], 8 ) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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return( 1 );
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}
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ret = mbedtls_cmac_verify( &ctx, M, Mlen_3des[i], T_3des_2key[i], 8 );
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if( ret != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( "failed\n" );
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return( 1 );
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}
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if( verbose != 0 )
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mbedtls_printf( "passed\n" );
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}
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// 3DES 3 key
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if( (ret = mbedtls_cmac_setkey( &ctx, MBEDTLS_CIPHER_ID_3DES, des3_3key_key, 8 * sizeof(des3_3key_key) )) != 0 )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: setup failed %i\n", ret);
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return( 1 );
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}
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if( ( memcmp( ctx.K1, des3_3key_k1, 8 ) != 0 ) ||
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( memcmp( ctx.K2, des3_3key_k2, 8 ) != 0 ) )
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{
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if( verbose != 0 )
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mbedtls_printf( " CMAC: subkey generation failed\n" );
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return( 1 );
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}
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for( i = 0; i < NB_CMAC_TESTS_3DES; i++ )
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{
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mbedtls_printf( " DES-168-CMAC #%u: ", i );
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ret = mbedtls_cmac_generate( &ctx, M, Mlen_3des[i], tag, 8 );
|
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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" );
|
||||
|
||||
return( 1 );
|
||||
}
|
||||
|
||||
if( verbose != 0 )
|
||||
mbedtls_printf( "passed\n" );
|
||||
}
|
||||
|
||||
mbedtls_cmac_free( &ctx );
|
||||
|
||||
for( i = 0; i < NB_PRF_TESTS; i++ )
|
||||
{
|
||||
|
|
@ -877,7 +800,7 @@ int mbedtls_cmac_self_test( int verbose )
|
|||
|
||||
if( verbose != 0 )
|
||||
mbedtls_printf( "\n" );
|
||||
|
||||
*/
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue