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Change how LMS and LMOTS negative tests work

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Signed-off-by: Raef Coles <raef.coles@arm.com>
This commit is contained in:
Raef Coles 2022-10-10 17:35:26 +01:00
parent 4829459c90
commit 0dc604ed2b
No known key found for this signature in database
GPG key ID: 1AAF1B43DF2086F4
2 changed files with 106 additions and 4 deletions
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55
tests/suites/test_suite_lmots.function
View file

@ -79,12 +79,63 @@ void lmots_verify_test ( data_t *msg, data_t *sig, data_t *pub_key,
int expected_rc )
{
mbedtls_lmots_public_t ctx;
unsigned int size;
unsigned char *tmp_sig = NULL;
mbedtls_lmots_public_init( &ctx );
mbedtls_lmots_import_public_key( &ctx, pub_key->x, pub_key->len );
TEST_EQUAL(mbedtls_lmots_import_public_key( &ctx, pub_key->x, pub_key->len ), 0);
TEST_ASSERT(mbedtls_lmots_verify( &ctx, msg->x, msg->len, sig->x, sig->len ) == expected_rc );
TEST_EQUAL(mbedtls_lmots_verify( &ctx, msg->x, msg->len, sig->x, sig->len ), expected_rc);
/* Test negative cases if the input data is valid */
if( expected_rc == 0 )
{
/* Altering first message byte must cause verification failure */
msg->x[0] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
msg->x[0] ^= 1;
/* Altering last message byte must cause verification failure */
msg->x[msg->len - 1] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
msg->x[msg->len - 1] ^= 1;
/* Altering first signature byte must cause verification failure */
sig->x[0] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
sig->x[0] ^= 1;
/* Altering first signature byte must cause verification failure */
sig->x[0] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
sig->x[0] ^= 1;
/* Altering last signature byte must cause verification failure */
sig->x[sig->len - 1] ^= 1;
TEST_EQUAL(mbedtls_lmots_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
sig->x[sig->len - 1] ^= 1;
/* Signatures of all sizes must not verify, whether shorter or longer */
for( size = 0; size < sig->len; size++ ) {
if( size == sig->len )
continue;
ASSERT_ALLOC( tmp_sig, size );
if( tmp_sig != NULL )
memcpy( tmp_sig, sig->x, MIN(size, sig->len) );
TEST_EQUAL(mbedtls_lmots_verify( &ctx, msg->x, msg->len, tmp_sig, size ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
mbedtls_free( tmp_sig );
tmp_sig = NULL;
}
}
exit:
mbedtls_lmots_public_free( &ctx );

55
tests/suites/test_suite_lms.function
View file

@ -85,12 +85,63 @@ void lms_verify_test ( data_t * msg, data_t * sig, data_t * pub_key,
int expected_rc )
{
mbedtls_lms_public_t ctx;
unsigned int size;
unsigned char *tmp_sig = NULL;
mbedtls_lms_public_init( &ctx);
mbedtls_lms_import_public_key( &ctx, pub_key->x, pub_key->len );
TEST_EQUAL(mbedtls_lms_import_public_key( &ctx, pub_key->x, pub_key->len ), 0);
TEST_ASSERT( mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ) == expected_rc );
TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ), expected_rc);
/* Test negative cases if the input data is valid */
if( expected_rc == 0 )
{
/* Altering first message byte must cause verification failure */
msg->x[0] ^= 1;
TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
msg->x[0] ^= 1;
/* Altering last message byte must cause verification failure */
msg->x[msg->len - 1] ^= 1;
TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
msg->x[msg->len - 1] ^= 1;
/* Altering first signature byte must cause verification failure */
sig->x[0] ^= 1;
TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
sig->x[0] ^= 1;
/* Altering first signature byte must cause verification failure */
sig->x[0] ^= 1;
TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
sig->x[0] ^= 1;
/* Altering last signature byte must cause verification failure */
sig->x[sig->len - 1] ^= 1;
TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
sig->x[sig->len - 1] ^= 1;
/* Signatures of all sizes must not verify, whether shorter or longer */
for( size = 0; size < sig->len; size++ ) {
if( size == sig->len )
continue;
ASSERT_ALLOC( tmp_sig, size );
if( tmp_sig != NULL )
memcpy( tmp_sig, sig->x, MIN(size, sig->len) );
TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, tmp_sig, size ),
MBEDTLS_ERR_LMS_VERIFY_FAILED);
mbedtls_free( tmp_sig );
tmp_sig = NULL;
}
}
exit:
mbedtls_lms_public_free( &ctx );