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Move the quasi reduction fixing function to bignum_mod_raw

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Rename the function to 'fix_quasi_reduction' to better suite its functionality.
Also changed the name prefix to suite for the new module.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
This commit is contained in:
Gabor Mezei
2023-01-23 16:13:43 +01:00
parent 7e14c66c4d
commit aaa1d2a276
14 changed files with 149 additions and 296 deletions
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92
tests/suites/test_suite_bignum_mod_raw.function
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@@ -6,6 +6,8 @@
#include "constant_time_internal.h"
#include "test/constant_flow.h"
#include "bignum_mod_raw_invasive.h"
/* END_HEADER */
/* BEGIN_DEPENDENCIES
@@ -338,6 +340,96 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE */
void mpi_mod_raw_fix_quasi_reduction(char *input_N,
char *input_A,
char *result)
{
mbedtls_mpi_uint *A = NULL;
mbedtls_mpi_uint *N = NULL;
mbedtls_mpi_uint *res = NULL;
size_t limbs_A;
size_t limbs_N;
size_t limbs_res;
mbedtls_mpi_mod_modulus m;
mbedtls_mpi_mod_modulus_init(&m);
TEST_EQUAL(mbedtls_test_read_mpi_core(&A, &limbs_A, input_A), 0);
TEST_EQUAL(mbedtls_test_read_mpi_core(&N, &limbs_N, input_N), 0);
TEST_EQUAL(mbedtls_test_read_mpi_core(&res, &limbs_res, result), 0);
size_t limbs = limbs_N;
size_t bytes = limbs * sizeof(mbedtls_mpi_uint);
TEST_EQUAL(limbs_A, limbs);
TEST_EQUAL(limbs_res, limbs);
TEST_EQUAL(mbedtls_mpi_mod_modulus_setup(
&m, N, limbs,
MBEDTLS_MPI_MOD_REP_MONTGOMERY), 0);
TEST_EQUAL(mbedtls_mpi_mod_raw_fix_quasi_reduction(A, &m), 0);
ASSERT_COMPARE(A, bytes, res, bytes);
exit:
mbedtls_free(A);
mbedtls_free(res);
mbedtls_mpi_mod_modulus_free(&m);
mbedtls_free(N);
}
/* END_CASE */
/* BEGIN_CASE */
void mpi_mod_raw_fix_quasi_reduction_neg(char *input_N,
char *input_A,
char *result)
{
mbedtls_mpi_uint *A = NULL;
mbedtls_mpi_uint *N = NULL;
mbedtls_mpi_uint *res = NULL;
size_t limbs_A;
size_t limbs_N;
size_t limbs_res;
mbedtls_mpi_mod_modulus m;
mbedtls_mpi_mod_modulus_init(&m);
mbedtls_mpi_mod_modulus fake_m;
mbedtls_mpi_mod_modulus_init(&fake_m);
TEST_EQUAL(mbedtls_test_read_mpi_core(&A, &limbs_A, input_A), 0);
TEST_EQUAL(mbedtls_test_read_mpi_core(&N, &limbs_N, input_N), 0);
TEST_EQUAL(mbedtls_test_read_mpi_core(&res, &limbs_res, result), 0);
size_t limbs = limbs_N;
size_t bytes = limbs * sizeof(mbedtls_mpi_uint);
TEST_EQUAL(limbs_A, limbs);
TEST_EQUAL(limbs_res, limbs);
TEST_EQUAL(mbedtls_mpi_mod_modulus_setup(
&m, N, limbs,
MBEDTLS_MPI_MOD_REP_MONTGOMERY), 0);
TEST_EQUAL(mbedtls_mpi_mod_raw_fix_quasi_reduction(A, &m), 0);
ASSERT_COMPARE(A, bytes, res, bytes);
/* Check when m is not initialized */
TEST_EQUAL(mbedtls_mpi_mod_raw_fix_quasi_reduction(A, &fake_m),
MBEDTLS_ERR_MPI_BAD_INPUT_DATA);
exit:
mbedtls_free(A);
mbedtls_free(res);
mbedtls_mpi_mod_modulus_free(&fake_m);
mbedtls_mpi_mod_modulus_free(&m);
mbedtls_free(N);
}
/* END_CASE */
/* BEGIN_CASE */
void mpi_mod_raw_mul(char *input_A,
char *input_B,