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Add negative tests for MAC verification

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Add negative tests for psa_mac_verify_finish: too large, too small, or
a changed byte.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2020-08-26 00:01:39 +02:00
parent 090e16cb8b
commit 29c4a6cf9f
1 changed files with 41 additions and 0 deletions
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41
tests/suites/test_suite_psa_crypto.function
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@ -3101,6 +3101,7 @@ void mac_verify( int key_type_arg,
psa_algorithm_t alg = alg_arg;
psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
uint8_t *perturbed_mac = NULL;
TEST_ASSERT( expected_mac->len <= PSA_MAC_MAX_SIZE );
@ -3112,6 +3113,7 @@ void mac_verify( int key_type_arg,
PSA_ASSERT( psa_import_key( &attributes, key->x, key->len, &handle ) );
/* Test the correct MAC. */
PSA_ASSERT( psa_mac_verify_setup( &operation,
handle, alg ) );
PSA_ASSERT( psa_mac_update( &operation,
@ -3120,9 +3122,48 @@ void mac_verify( int key_type_arg,
expected_mac->x,
expected_mac->len ) );
/* Test a MAC that's too short. */
PSA_ASSERT( psa_mac_verify_setup( &operation,
handle, alg ) );
PSA_ASSERT( psa_mac_update( &operation,
input->x, input->len ) );
TEST_EQUAL( psa_mac_verify_finish( &operation,
expected_mac->x,
expected_mac->len - 1 ),
PSA_ERROR_INVALID_SIGNATURE );
/* Test a MAC that's too long. */
ASSERT_ALLOC( perturbed_mac, expected_mac->len + 1 );
memcpy( perturbed_mac, expected_mac->x, expected_mac->len );
PSA_ASSERT( psa_mac_verify_setup( &operation,
handle, alg ) );
PSA_ASSERT( psa_mac_update( &operation,
input->x, input->len ) );
TEST_EQUAL( psa_mac_verify_finish( &operation,
perturbed_mac,
expected_mac->len + 1 ),
PSA_ERROR_INVALID_SIGNATURE );
/* Test changing one byte. */
for( size_t i = 0; i < expected_mac->len; i++ )
{
test_set_step( i );
perturbed_mac[i] ^= 1;
PSA_ASSERT( psa_mac_verify_setup( &operation,
handle, alg ) );
PSA_ASSERT( psa_mac_update( &operation,
input->x, input->len ) );
TEST_EQUAL( psa_mac_verify_finish( &operation,
perturbed_mac,
expected_mac->len ),
PSA_ERROR_INVALID_SIGNATURE );
perturbed_mac[i] ^= 1;
}
exit:
psa_destroy_key( handle );
PSA_DONE( );
mbedtls_free( perturbed_mac );
}
/* END_CASE */