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