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Add an explicit mbedtls_mpi_core_montmul_working_limbs() function

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Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
This commit is contained in:
Tom Cosgrove
2022-12-12 17:06:27 +00:00
parent 30f3b4d601
commit 28ff92cc3a
5 changed files with 38 additions and 3 deletions
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8
tests/suites/test_suite_bignum_core.function
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@@ -798,7 +798,9 @@ void mpi_core_montmul( int limbs_AN4, int limbs_B4,
TEST_EQUAL( 0, mbedtls_mpi_grow( X, limbs_AN ) );
TEST_EQUAL( 0, mbedtls_mpi_grow( &B, limbs_B ) );
TEST_EQUAL( 0, mbedtls_mpi_grow( &T, limbs_AN * 2 + 1 ) );
size_t working_limbs = mbedtls_mpi_core_montmul_working_limbs( limbs_AN );
TEST_EQUAL( working_limbs, limbs_AN * 2 + 1 );
TEST_EQUAL( 0, mbedtls_mpi_grow( &T, working_limbs ) );
/* Calculate the Montgomery constant (this is unit tested separately) */
mbedtls_mpi_uint mm = mbedtls_mpi_core_montmul_init( N.p );
@@ -1083,6 +1085,10 @@ void mpi_core_exp_mod( char * input_N, char * input_A,
TEST_LE_U( min_expected_working_limbs, working_limbs );
TEST_LE_U( working_limbs, max_expected_working_limbs );
/* Should also be at least mbedtls_mpi_core_montmul_working_limbs() */
TEST_LE_U( mbedtls_mpi_core_montmul_working_limbs( N_limbs ),
working_limbs );
ASSERT_ALLOC( T, working_limbs );
mbedtls_mpi_core_exp_mod( Y, A, N, N_limbs, E, E_limbs, R2, T );

4
tests/suites/test_suite_bignum_mod_raw.function
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@@ -394,6 +394,10 @@ void mpi_mod_raw_inv_prime( char * input_N, char * input_A, char * input_X )
TEST_LE_U( min_expected_working_limbs, working_limbs );
TEST_LE_U( working_limbs, max_expected_working_limbs );
/* Should also be at least mbedtls_mpi_core_montmul_working_limbs() */
TEST_LE_U( mbedtls_mpi_core_montmul_working_limbs( N_limbs ),
working_limbs );
ASSERT_ALLOC( T, working_limbs );
mbedtls_mpi_mod_raw_inv_prime( Y, A, N, N_limbs, R2, T );