mbedtls/tests/suites/test_suite_ccm.function
Manuel Pégourié-Gonnard ce77d55023 Implement ccm_auth_decrypt()
2014-05-07 12:13:13 +02:00

138 lines
3.7 KiB
Text

/* BEGIN_HEADER */
#include <polarssl/ccm.h>
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:POLARSSL_CCM_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE depends_on:POLARSSL_SELF_TEST:POLARSSL_AES_C */
void ccm_self_test( )
{
TEST_ASSERT( ccm_self_test( 0 ) == 0 );
}
/* END_CASE */
/* BEGIN_CASE */
void ccm_init( int cipher_id, int key_size, int result )
{
ccm_context ctx;
unsigned char key[32];
int ret;
memset( key, 0x2A, sizeof( key ) );
TEST_ASSERT( (unsigned) key_size <= 8 * sizeof( key ) );
ret = ccm_init( &ctx, cipher_id, key, key_size );
TEST_ASSERT( ret == result );
ccm_free( &ctx );
}
/* END_CASE */
/* BEGIN_CASE */
void ccm_encrypt_and_tag( int cipher_id,
char *key_hex, char *msg_hex,
char *iv_hex, char *add_hex,
char *result_hex )
{
unsigned char key[128];
unsigned char msg[128];
unsigned char iv[128];
unsigned char add[128];
unsigned char output[144];
unsigned char result[144];
ccm_context ctx;
size_t key_len, msg_len, iv_len, add_len, tag_len, result_len;
memset( key, 0x00, sizeof( key ) );
memset( msg, 0x00, sizeof( msg ) );
memset( iv, 0x00, sizeof( iv ) );
memset( add, 0x00, sizeof( add ) );
memset( output, 0x00, sizeof( output ) );
memset( result, 0x00, sizeof( result ) );
key_len = unhexify( key, key_hex );
msg_len = unhexify( msg, msg_hex );
iv_len = unhexify( iv, iv_hex );
add_len = unhexify( add, add_hex );
result_len = unhexify( result, result_hex );
tag_len = result_len - msg_len;
TEST_ASSERT( ccm_init( &ctx, cipher_id, key, key_len * 8 ) == 0 );
TEST_ASSERT( ccm_encrypt_and_tag( &ctx, msg_len, iv, iv_len, add, add_len,
msg, output, output + msg_len, tag_len ) == 0 );
TEST_ASSERT( memcmp( output, result, result_len ) == 0 );
/* Check we didn't write past the end */
TEST_ASSERT( output[result_len] == 0 && output[result_len + 1] == 0 );
ccm_free( &ctx );
}
/* END_CASE */
/* BEGIN_CASE */
void ccm_auth_decrypt( int cipher_id,
char *key_hex, char *msg_hex,
char *iv_hex, char *add_hex,
int tag_len, char *result_hex )
{
unsigned char key[128];
unsigned char msg[128];
unsigned char iv[128];
unsigned char add[128];
unsigned char output[144];
unsigned char result[144];
ccm_context ctx;
size_t key_len, msg_len, iv_len, add_len, result_len;
int ret;
memset( key, 0x00, sizeof( key ) );
memset( msg, 0x00, sizeof( msg ) );
memset( iv, 0x00, sizeof( iv ) );
memset( add, 0x00, sizeof( add ) );
memset( output, 0xFF, sizeof( output ) );
memset( result, 0x00, sizeof( result ) );
key_len = unhexify( key, key_hex );
msg_len = unhexify( msg, msg_hex );
iv_len = unhexify( iv, iv_hex );
add_len = unhexify( add, add_hex );
msg_len -= tag_len;
if( strcmp( "FAIL", result_hex ) == 0 )
{
ret = POLARSSL_ERR_CCM_AUTH_FAILED;
}
else
{
ret = 0;
result_len = unhexify( result, result_hex );
}
TEST_ASSERT( ccm_init( &ctx, cipher_id, key, key_len * 8 ) == 0 );
TEST_ASSERT( ccm_auth_decrypt( &ctx, msg_len, iv, iv_len, add, add_len,
msg, output, msg + msg_len, tag_len ) == ret );
if( ret == 0 )
{
TEST_ASSERT( memcmp( output, result, result_len ) == 0 );
}
else
{
size_t i;
for( i = 0; i < msg_len; i++ )
TEST_ASSERT( output[i] == 0 );
}
/* Check we didn't write past the end */
TEST_ASSERT( output[msg_len] == 0xFF && output[msg_len + 1] == 0xFF );
ccm_free( &ctx );
}
/* END_CASE */