| /* BEGIN_HEADER */ |
| /** \file test_suite_constant_time.function |
| * |
| * Functional testing of functions in the constant_time module. |
| * |
| * The tests are instrumented with #TEST_CF_SECRET and #TEST_CF_PUBLIC |
| * (see tests/include/test/constant_flow.h) so that running the tests |
| * under MSan or Valgrind will detect a non-constant-time implementation. |
| */ |
| |
| #include <mbedtls/constant_time.h> |
| #include <constant_time_internal.h> |
| #include <constant_time_invasive.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_memcpy_offset( int offset_min, int offset_max, int len ) |
| { |
| unsigned char *dst = NULL; |
| unsigned char *src = NULL; |
| size_t src_len = offset_max + len; |
| size_t secret; |
| |
| ASSERT_ALLOC( dst, len ); |
| ASSERT_ALLOC( src, src_len ); |
| |
| /* Fill src in a way that we can detect if we copied the right bytes */ |
| mbedtls_test_rnd_std_rand( NULL, src, src_len ); |
| |
| for( secret = offset_min; secret <= (size_t) offset_max; secret++ ) |
| { |
| mbedtls_test_set_step( (int) secret ); |
| |
| TEST_CF_SECRET( &secret, sizeof( secret ) ); |
| mbedtls_ct_memcpy_offset( dst, src, secret, |
| offset_min, offset_max, len ); |
| TEST_CF_PUBLIC( &secret, sizeof( secret ) ); |
| TEST_CF_PUBLIC( dst, len ); |
| |
| ASSERT_COMPARE( dst, len, src + secret, len ); |
| } |
| |
| exit: |
| mbedtls_free( dst ); |
| mbedtls_free( src ); |
| } |
| /* END_CASE */ |