diff options
Diffstat (limited to 'tests/suites/test_suite_constant_time_hmac.function')
| -rw-r--r-- | tests/suites/test_suite_constant_time_hmac.function | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/tests/suites/test_suite_constant_time_hmac.function b/tests/suites/test_suite_constant_time_hmac.function new file mode 100644 index 000000000..f8c1bfc0c --- /dev/null +++ b/tests/suites/test_suite_constant_time_hmac.function @@ -0,0 +1,160 @@ +/* BEGIN_HEADER */ + +#include <mbedtls/constant_time.h> +#include <mbedtls/legacy_or_psa.h> +#include <mbedtls/md.h> +#include <constant_time_internal.h> +#include <hash_info.h> + +#include <test/constant_flow.h> +/* END_HEADER */ + +/* BEGIN_CASE depends_on:MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC:MBEDTLS_TEST_HOOKS */ +void ssl_cf_hmac( int hash ) +{ + /* + * Test the function mbedtls_ct_hmac() against a reference + * implementation. + */ +#if defined(MBEDTLS_USE_PSA_CRYPTO) + mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT; + psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; + psa_algorithm_t alg; + psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT; +#else + mbedtls_md_context_t ctx, ref_ctx; + const mbedtls_md_info_t *md_info; +#endif /* MBEDTLS_USE_PSA_CRYPTO */ + size_t out_len, block_size; + size_t min_in_len, in_len, max_in_len, i; + /* TLS additional data is 13 bytes (hence the "lucky 13" name) */ + unsigned char add_data[13]; + unsigned char ref_out[MBEDTLS_HASH_MAX_SIZE]; + unsigned char *data = NULL; + unsigned char *out = NULL; + unsigned char rec_num = 0; + + USE_PSA_INIT( ); + +#if defined(MBEDTLS_USE_PSA_CRYPTO) + alg = PSA_ALG_HMAC( mbedtls_hash_info_psa_from_md( hash ) ); + + out_len = PSA_HASH_LENGTH( alg ); + block_size = PSA_HASH_BLOCK_LENGTH( alg ); + + /* mbedtls_ct_hmac() requires the key to be exportable */ + psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_EXPORT | + PSA_KEY_USAGE_VERIFY_HASH ); + psa_set_key_algorithm( &attributes, PSA_ALG_HMAC( alg ) ); + psa_set_key_type( &attributes, PSA_KEY_TYPE_HMAC ); +#else + mbedtls_md_init( &ctx ); + mbedtls_md_init( &ref_ctx ); + + md_info = mbedtls_md_info_from_type( hash ); + TEST_ASSERT( md_info != NULL ); + out_len = mbedtls_md_get_size( md_info ); + TEST_ASSERT( out_len != 0 ); + block_size = hash == MBEDTLS_MD_SHA384 ? 128 : 64; +#endif /* MBEDTLS_USE_PSA_CRYPTO */ + + /* Use allocated out buffer to catch overwrites */ + ASSERT_ALLOC( out, out_len ); + +#if defined(MBEDTLS_USE_PSA_CRYPTO) + /* Set up dummy key */ + memset( ref_out, 42, sizeof( ref_out ) ); + TEST_EQUAL( PSA_SUCCESS, psa_import_key( &attributes, + ref_out, out_len, + &key ) ); +#else + /* Set up contexts with the given hash and a dummy key */ + TEST_EQUAL( 0, mbedtls_md_setup( &ctx, md_info, 1 ) ); + TEST_EQUAL( 0, mbedtls_md_setup( &ref_ctx, md_info, 1 ) ); + memset( ref_out, 42, sizeof( ref_out ) ); + TEST_EQUAL( 0, mbedtls_md_hmac_starts( &ctx, ref_out, out_len ) ); + TEST_EQUAL( 0, mbedtls_md_hmac_starts( &ref_ctx, ref_out, out_len ) ); + memset( ref_out, 0, sizeof( ref_out ) ); +#endif + + /* + * Test all possible lengths up to a point. The difference between + * max_in_len and min_in_len is at most 255, and make sure they both vary + * by at least one block size. + */ + for( max_in_len = 0; max_in_len <= 255 + block_size; max_in_len++ ) + { + mbedtls_test_set_step( max_in_len * 10000 ); + + /* Use allocated in buffer to catch overreads */ + ASSERT_ALLOC( data, max_in_len ); + + min_in_len = max_in_len > 255 ? max_in_len - 255 : 0; + for( in_len = min_in_len; in_len <= max_in_len; in_len++ ) + { + mbedtls_test_set_step( max_in_len * 10000 + in_len ); + + /* Set up dummy data and add_data */ + rec_num++; + memset( add_data, rec_num, sizeof( add_data ) ); + for( i = 0; i < in_len; i++ ) + data[i] = ( i & 0xff ) ^ rec_num; + + /* Get the function's result */ + TEST_CF_SECRET( &in_len, sizeof( in_len ) ); +#if defined(MBEDTLS_USE_PSA_CRYPTO) + TEST_EQUAL( 0, mbedtls_ct_hmac( key, PSA_ALG_HMAC( alg ), + add_data, sizeof( add_data ), + data, in_len, + min_in_len, max_in_len, + out ) ); +#else + TEST_EQUAL( 0, mbedtls_ct_hmac( &ctx, add_data, sizeof( add_data ), + data, in_len, + min_in_len, max_in_len, + out ) ); +#endif /* MBEDTLS_USE_PSA_CRYPTO */ + TEST_CF_PUBLIC( &in_len, sizeof( in_len ) ); + TEST_CF_PUBLIC( out, out_len ); + +#if defined(MBEDTLS_USE_PSA_CRYPTO) + TEST_EQUAL( PSA_SUCCESS, psa_mac_verify_setup( &operation, + key, alg ) ); + TEST_EQUAL( PSA_SUCCESS, psa_mac_update( &operation, add_data, + sizeof( add_data ) ) ); + TEST_EQUAL( PSA_SUCCESS, psa_mac_update( &operation, + data, in_len ) ); + TEST_EQUAL( PSA_SUCCESS, psa_mac_verify_finish( &operation, + out, out_len ) ); +#else + /* Compute the reference result */ + TEST_EQUAL( 0, mbedtls_md_hmac_update( &ref_ctx, add_data, + sizeof( add_data ) ) ); + TEST_EQUAL( 0, mbedtls_md_hmac_update( &ref_ctx, data, in_len ) ); + TEST_EQUAL( 0, mbedtls_md_hmac_finish( &ref_ctx, ref_out ) ); + TEST_EQUAL( 0, mbedtls_md_hmac_reset( &ref_ctx ) ); + + /* Compare */ + ASSERT_COMPARE( out, out_len, ref_out, out_len ); +#endif /* MBEDTLS_USE_PSA_CRYPTO */ + } + + mbedtls_free( data ); + data = NULL; + } + +exit: +#if defined(MBEDTLS_USE_PSA_CRYPTO) + psa_mac_abort( &operation ); + psa_destroy_key( key ); +#else + mbedtls_md_free( &ref_ctx ); + mbedtls_md_free( &ctx ); +#endif /* MBEDTLS_USE_PSA_CRYPTO */ + + mbedtls_free( data ); + mbedtls_free( out ); + + USE_PSA_DONE( ); +} +/* END_CASE */ |