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bignum_tests: Refactored mpi_mod_io_neg()

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This patch refactores the negative testing suite
to utilised non-hardcoded input data.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This commit is contained in:
Minos Galanakis 2022-11-25 19:32:10 +00:00 committed by Janos Follath
parent 91f3abdfda
commit 96070a53a8
2 changed files with 49 additions and 75 deletions
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16
tests/suites/test_suite_bignum_mod.data
View file

@ -56,8 +56,20 @@ mpi_residue_setup:"fe":"fe":-4
Test mbedtls_mpi_residue_setup #8 r > m
mpi_residue_setup:"fe":"ff":-4
Test mbedtls_mpi_mod_io_neg
mpi_mod_io_neg:
Test mbedtls_mpi_mod_io_neg #1 input_r < modulo m
mpi_mod_io_neg:"fe":"01":1:253:0
Test mbedtls_mpi_mod_io_neg #2 input_r == modulo m
mpi_mod_io_neg:"fe":"01":1:254:-4
Test mbedtls_mpi_mod_io_neg #3 input_r >= modulo m
mpi_mod_io_neg:"fe":"01":1:255:-4
Test mbedtls_mpi_mod_io_neg #4 input_r too large to fit
mpi_mod_io_neg:"fe":"01":1024:255:-8
Test mbedtls_mpi_mod_io_neg #5 Sucesfull read / output buffer too small
mpi_mod_io_neg:"7ffffffffffffffffffffffffffffff1":"7ffffffffffffffffffffffffffffff0":2:255:0
Test mbedtls_mpi_mod_io #1 N: "11" A: "119".
mpi_mod_io:"000000000000000b":"0000000000000000":MBEDTLS_MPI_MOD_EXT_REP_BE

108
tests/suites/test_suite_bignum_mod.function
View file

@ -114,102 +114,64 @@ exit:
/* END_CASE */
/* BEGIN_CASE */
void mpi_mod_io_neg( )
void mpi_mod_io_neg( char * input_N, char * input_R, int buff_bytes, int buff_byte_val, int ret )
{
mbedtls_mpi_uint *N = NULL;
mbedtls_mpi_uint *R = NULL;
mbedtls_mpi_uint *N2 = NULL;
mbedtls_mpi_uint *R2 = NULL;
unsigned char *r_buff = NULL;
size_t n_limbs, r_limbs, n2_limbs, r2_limbs;
size_t n_limbs, r_limbs;
mbedtls_mpi_mod_modulus m;
mbedtls_mpi_mod_residue r;
mbedtls_mpi_mod_modulus m2;
mbedtls_mpi_mod_residue rn = { NULL, 0 };
const char *hex_residue_single = "01";
const char *hex_modulus_single = "fe";
const char *hex_residue_multi = "7ffffffffffffffffffffffffffffff0";
const char *hex_modulus_multi = "7ffffffffffffffffffffffffffffff1";
const size_t buff_bytes = 1024;
mbedtls_mpi_mod_ext_rep endian = MBEDTLS_MPI_MOD_EXT_REP_LE;
mbedtls_mpi_mod_modulus_init( &m );
mbedtls_mpi_mod_modulus_init( &m2 );
/* Allocate the memory for intermediate data structures */
TEST_EQUAL( 0, mbedtls_test_read_mpi_core( &N, &n_limbs, hex_modulus_single ) );
TEST_EQUAL( 0, mbedtls_test_read_mpi_core( &R, &r_limbs, hex_residue_single ) );
TEST_EQUAL( 0, mbedtls_test_read_mpi_core( &N2, &n2_limbs, hex_modulus_multi ) );
TEST_EQUAL( 0, mbedtls_test_read_mpi_core( &R2, &r2_limbs, hex_residue_multi ) );
/* Allocate more than required space on buffer so we can test for input_r > mpi */
ASSERT_ALLOC( r_buff, buff_bytes );
memset( r_buff, 0x1, 1 );
/* Fill the buffer with the value passed in */
memset( r_buff, buff_byte_val, buff_bytes );
mbedtls_mpi_mod_ext_rep endian = MBEDTLS_MPI_MOD_EXT_REP_LE;
TEST_EQUAL( 0, mbedtls_mpi_mod_modulus_setup( &m, N, n_limbs,
MBEDTLS_MPI_MOD_REP_MONTGOMERY ) );
TEST_EQUAL( 0, mbedtls_test_read_mpi_core( &N, &n_limbs, input_N ) );
TEST_EQUAL( 0, mbedtls_test_read_mpi_core( &R, &r_limbs, input_R ) );
TEST_EQUAL( 0, mbedtls_mpi_mod_residue_setup( &r, &m, R , n_limbs ) );
/* Pass for input_r < modulo */
TEST_EQUAL( 0, mbedtls_mpi_mod_read( &r, &m, r_buff, 1, endian ) );
/* Pass for input_r == modulo -1 */
memset( r_buff, 0xfd, buff_bytes );
TEST_EQUAL( 0, mbedtls_mpi_mod_read( &r, &m, r_buff, 1, endian ) );
/* modulo->p == NULL || residue->p == NULL ( m2 has not been set-up ) */
/* modulo->p == NULL || residue->p == NULL ( m has not been set-up ) */
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_read( &r, &m2, r_buff, 1, endian ) );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_read( &rn, &m, r_buff, 1, endian ) );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_write( &r, &m2, r_buff, 1, endian ) );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_write( &rn, &m, r_buff, 1, endian ) );
/* Fail for r_limbs < m->limbs */
r.limbs = m.limbs - 1;
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_read( &r, &m, r_buff, 1, endian ) );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_write( &rn, &m, r_buff, 1, endian ) );
r.limbs = r_limbs;
/* Fail if input_r >= modulo m */
/* input_r = modulo */
memset( r_buff, 0xfe, buff_bytes );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_read( &r, &m, r_buff, 1, endian ) );
/* input_r > modulo */
memset( r_buff, 0xff, buff_bytes );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_read( &r, &m, r_buff, 1, endian ) );
/* Data too large to fit */
TEST_EQUAL( MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL,
mbedtls_mpi_mod_read( &r, &m, r_buff, buff_bytes, endian ) );
/* Read the two limbs input data into a larger modulus and residue */
TEST_EQUAL( 0, mbedtls_mpi_mod_modulus_setup( &m2, N2, n2_limbs,
MBEDTLS_MPI_MOD_REP_MONTGOMERY ) );
rn.p = R2;
rn.limbs = r2_limbs;
TEST_EQUAL( MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL,
mbedtls_mpi_mod_write( &rn, &m2, r_buff, 1, endian ) );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_write( &r, &m, r_buff, buff_bytes, endian ) );
TEST_EQUAL( 0, mbedtls_mpi_mod_modulus_setup( &m, N, n_limbs,
MBEDTLS_MPI_MOD_REP_MONTGOMERY ) );
TEST_EQUAL( 0, mbedtls_mpi_mod_residue_setup( &r, &m, R , n_limbs ) );
/* modulo->p == NULL || residue->p == NULL ( m has been set-up ) */
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_read( &rn, &m, r_buff, buff_bytes, endian ) );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_write( &rn, &m, r_buff, buff_bytes, endian ) );
/* Fail for r_limbs > m->limbs */
r.limbs = m.limbs + 1;
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_read( &r, &m, r_buff, buff_bytes, endian ) );
TEST_EQUAL( MBEDTLS_ERR_MPI_BAD_INPUT_DATA,
mbedtls_mpi_mod_write( &r, &m, r_buff, buff_bytes, endian ) );
r.limbs = r_limbs;
/* Test the read */
TEST_EQUAL( ret, mbedtls_mpi_mod_read( &r, &m, r_buff, buff_bytes, endian ) );
/* Test write overflow only when the representation is large and read is successful */
if (r.limbs > 1 && ret == 0)
TEST_EQUAL( MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL,
mbedtls_mpi_mod_write( &r, &m, r_buff, 1, endian ) );
exit:
mbedtls_mpi_mod_modulus_free( &m );
mbedtls_mpi_mod_modulus_free( &m2 );
mbedtls_free( N );
mbedtls_free( R );
mbedtls_free( N2 );
mbedtls_free( R2 );
mbedtls_free( r_buff );
}
/* END_CASE */