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Reword test cases

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Reword test cases to be easier to read and understand.
Adds comments to better explain what the test is doing.

Signed-off-by: Chris Jones <christopher.jones@arm.com>
This commit is contained in:
Chris Jones 2020-12-03 11:35:41 +00:00
parent a03f56fe8f
commit aa850cdfdc
2 changed files with 17 additions and 14 deletions
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19
tests/suites/test_suite_mpi.function
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@ -1166,28 +1166,31 @@ exit:
/* BEGIN_CASE */
void mbedtls_mpi_exp_mod_size( int A_bytes, int E_bytes, int N_bytes,
int radix_RR, char * input_RR, int div_result )
int radix_RR, char * input_RR, int exp_result )
{
mbedtls_mpi A, E, N, RR, Z;
mbedtls_mpi_init( &A ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &N );
mbedtls_mpi_init( &RR ); mbedtls_mpi_init( &Z );
/* Set A to 2^(A_bytes - 1) + 1 */
TEST_ASSERT( mbedtls_mpi_lset( &A, 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_lset( &E, 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_lset( &N, 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_shift_l( &A, ( A_bytes * 8 ) - 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_shift_l( &E, ( E_bytes * 8 ) - 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_shift_l( &N, ( N_bytes * 8 ) - 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_set_bit( &A, 0, 1 ) == 0 );
/* Set E to 2^(E_bytes - 1) + 1 */
TEST_ASSERT( mbedtls_mpi_lset( &E, 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_shift_l( &E, ( E_bytes * 8 ) - 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_set_bit( &E, 0, 1 ) == 0 );
/* Set N to 2^(N_bytes - 1) + 1 */
TEST_ASSERT( mbedtls_mpi_lset( &N, 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_shift_l( &N, ( N_bytes * 8 ) - 1 ) == 0 );
TEST_ASSERT( mbedtls_mpi_set_bit( &N, 0, 1 ) == 0 );
if( strlen( input_RR ) )
TEST_ASSERT( mbedtls_mpi_read_string( &RR, radix_RR, input_RR ) == 0 );
TEST_ASSERT( mbedtls_mpi_exp_mod( &Z, &A, &E, &N, &RR ) == div_result );
TEST_ASSERT( mbedtls_mpi_exp_mod( &Z, &A, &E, &N, &RR ) == exp_result );
exit:
mbedtls_mpi_free( &A ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &N );