CMAC support for cipher with 64bit blocks (DES/3DES)
diff --git a/library/cmac.c b/library/cmac.c
index 23b8044..ab4a82d 100644
--- a/library/cmac.c
+++ b/library/cmac.c
@@ -60,24 +60,39 @@
}
/*
- * 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 @@
#pragma warning( pop )
#endif
- output[15] ^= Rb & mask;
+ output[starting_index] ^= R_n & mask;
+ return 0;
}
/*
@@ -104,27 +120,35 @@
*/
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 @@
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 @@
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 @@
*/
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 @@
* 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 @@
}
/*
- * 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 @@
*/
#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 @@
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 @@
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 @@
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 @@
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 @@
* 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 @@
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 @@
};
/* 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 @@
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 @@
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 @@
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 @@
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 @@
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 @@
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" );
