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Change mpi_core_exp_mod() constant time testing to be clearer

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Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
This commit is contained in:
Waleed Elmelegy 2024-06-25 09:45:19 +00:00
parent 7b3024e791
commit 7ac7f82053
1 changed files with 4 additions and 8 deletions
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12
tests/suites/test_suite_bignum_core.function
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@ -1302,18 +1302,16 @@ void mpi_core_exp_mod(char *input_N, char *input_A,
working_limbs); working_limbs);
TEST_CALLOC(T, working_limbs); TEST_CALLOC(T, working_limbs);
/* Temporary because MEMSAN doesn't support assembly implementation see #1243 */
#if !defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN) #if !defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN)
TEST_CF_SECRET(A, A_limbs * sizeof(mbedtls_mpi_uint)); TEST_CF_SECRET(A, A_limbs * sizeof(mbedtls_mpi_uint));
TEST_CF_SECRET(N, N_limbs * sizeof(mbedtls_mpi_uint)); TEST_CF_SECRET(N, N_limbs * sizeof(mbedtls_mpi_uint));
TEST_CF_SECRET(E, E_limbs * sizeof(mbedtls_mpi_uint)); TEST_CF_SECRET(E, E_limbs * sizeof(mbedtls_mpi_uint));
#endif #endif
mbedtls_mpi_core_exp_mod(Y, A, N, N_limbs, E, E_limbs, R2, T); mbedtls_mpi_core_exp_mod(Y, A, N, N_limbs, E, E_limbs, R2, T);
#if !defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN)
TEST_CF_PUBLIC(Y, N_limbs * sizeof(mbedtls_mpi_uint)); TEST_CF_PUBLIC(Y, N_limbs * sizeof(mbedtls_mpi_uint));
TEST_CF_PUBLIC(A, A_limbs * sizeof(mbedtls_mpi_uint));
TEST_CF_PUBLIC(N, N_limbs * sizeof(mbedtls_mpi_uint));
TEST_CF_PUBLIC(E, E_limbs * sizeof(mbedtls_mpi_uint));
#endif
TEST_EQUAL(0, memcmp(X, Y, N_limbs * sizeof(mbedtls_mpi_uint))); TEST_EQUAL(0, memcmp(X, Y, N_limbs * sizeof(mbedtls_mpi_uint)));
@ -1324,10 +1322,8 @@ void mpi_core_exp_mod(char *input_N, char *input_A,
#endif #endif
/* Check when output aliased to input */ /* Check when output aliased to input */
mbedtls_mpi_core_exp_mod(A, A, N, N_limbs, E, E_limbs, R2, T); mbedtls_mpi_core_exp_mod(A, A, N, N_limbs, E, E_limbs, R2, T);
#if !defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN)
TEST_CF_PUBLIC(A, A_limbs * sizeof(mbedtls_mpi_uint));
#endif
TEST_CF_PUBLIC(A, A_limbs * sizeof(mbedtls_mpi_uint));
TEST_EQUAL(0, memcmp(X, A, N_limbs * sizeof(mbedtls_mpi_uint))); TEST_EQUAL(0, memcmp(X, A, N_limbs * sizeof(mbedtls_mpi_uint)));
exit: exit: