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mbedtls/tests/suites/test_suite_bignum_mod_raw.function
Tom Cosgrove be17655b57 mbedtls_mpi_mod_modulus_init() must be called before any 'goto exit' in tests 
Fixes Coverity issues 381527 and 381526.

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
2022-10-20 16:57:10 +01:00

280 lines
8.2 KiB
C
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/* BEGIN_HEADER */
#include "mbedtls/bignum.h"
#include "mbedtls/entropy.h"
#include "bignum_core.h"
#include "bignum_mod_raw.h"
#include "constant_time_internal.h"
#include "test/constant_flow.h"
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_BIGNUM_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void mpi_mod_raw_io( data_t *input, int nb_int, int nx_32_int,
int iendian, int iret, int oret )
{
mbedtls_mpi_mod_modulus m;
mbedtls_mpi_mod_modulus_init( &m );
if( iret != 0 )
TEST_ASSERT( oret == 0 );
TEST_LE_S( 0, nb_int );
size_t nb = nb_int;
unsigned char buf[1024];
TEST_LE_U( nb, sizeof( buf ) );
/* nx_32_int is the number of 32 bit limbs, if we have 64 bit limbs we need
* to halve the number of limbs to have the same size. */
size_t nx;
TEST_LE_S( 0, nx_32_int );
if( sizeof( mbedtls_mpi_uint ) == 8 )
nx = nx_32_int / 2 + nx_32_int % 2;
else
nx = nx_32_int;
mbedtls_mpi_uint X[sizeof( buf ) / sizeof( mbedtls_mpi_uint )];
TEST_LE_U( nx, sizeof( X ) / sizeof( X[0] ) );
int endian;
if( iendian == MBEDTLS_MPI_MOD_EXT_REP_INVALID )
endian = MBEDTLS_MPI_MOD_EXT_REP_LE;
else
endian = iendian;
mbedtls_mpi_uint init[sizeof( X ) / sizeof( X[0] )];
memset( init, 0xFF, sizeof( init ) );
int ret = mbedtls_mpi_mod_modulus_setup( &m, init, nx, endian,
MBEDTLS_MPI_MOD_REP_MONTGOMERY );
TEST_EQUAL( ret, 0 );
if( iendian == MBEDTLS_MPI_MOD_EXT_REP_INVALID && iret != 0 )
m.ext_rep = MBEDTLS_MPI_MOD_EXT_REP_INVALID;
ret = mbedtls_mpi_mod_raw_read( X, &m, input->x, input->len );
TEST_EQUAL( ret, iret );
if( iret == 0 )
{
if( iendian == MBEDTLS_MPI_MOD_EXT_REP_INVALID && oret != 0 )
m.ext_rep = MBEDTLS_MPI_MOD_EXT_REP_INVALID;
ret = mbedtls_mpi_mod_raw_write( X, &m, buf, nb );
TEST_EQUAL( ret, oret );
}
if( ( iret == 0 ) && ( oret == 0 ) )
{
if( nb > input->len )
{
if( endian == MBEDTLS_MPI_MOD_EXT_REP_BE )
{
size_t leading_zeroes = nb - input->len;
TEST_ASSERT( memcmp( buf + nb - input->len, input->x, input->len ) == 0 );
for( size_t i = 0; i < leading_zeroes; i++ )
TEST_EQUAL( buf[i], 0 );
}
else
{
TEST_ASSERT( memcmp( buf, input->x, input->len ) == 0 );
for( size_t i = input->len; i < nb; i++ )
TEST_EQUAL( buf[i], 0 );
}
}
else
{
if( endian == MBEDTLS_MPI_MOD_EXT_REP_BE )
{
size_t leading_zeroes = input->len - nb;
TEST_ASSERT( memcmp( input->x + input->len - nb, buf, nb ) == 0 );
for( size_t i = 0; i < leading_zeroes; i++ )
TEST_EQUAL( input->x[i], 0 );
}
else
{
TEST_ASSERT( memcmp( input->x, buf, nb ) == 0 );
for( size_t i = nb; i < input->len; i++ )
TEST_EQUAL( input->x[i], 0 );
}
}
}
exit:
mbedtls_mpi_mod_modulus_free( &m );
}
/* END_CASE */
/* BEGIN_CASE */
void mpi_mod_raw_cond_assign( data_t * input_X,
data_t * input_Y,
int input_bytes )
{
mbedtls_mpi_uint *X = NULL;
mbedtls_mpi_uint *Y = NULL;
mbedtls_mpi_uint *buff_m = NULL;
mbedtls_mpi_mod_modulus m;
size_t limbs_X = CHARS_TO_LIMBS( input_X->len );
size_t limbs_Y = CHARS_TO_LIMBS( input_Y->len );
size_t limbs = limbs_X;
size_t copy_limbs = CHARS_TO_LIMBS( input_bytes );
size_t bytes = limbs * sizeof( mbedtls_mpi_uint );
size_t copy_bytes = copy_limbs * sizeof( mbedtls_mpi_uint );
mbedtls_mpi_mod_modulus_init( &m );
TEST_EQUAL( limbs_X, limbs_Y );
TEST_ASSERT( copy_limbs <= limbs );
ASSERT_ALLOC( X, limbs );
ASSERT_ALLOC( Y, limbs );
ASSERT_ALLOC( buff_m, limbs );
TEST_ASSERT( mbedtls_mpi_mod_modulus_setup(
&m, buff_m, copy_limbs,
MBEDTLS_MPI_MOD_EXT_REP_BE,
MBEDTLS_MPI_MOD_REP_MONTGOMERY )
== 0 );
TEST_ASSERT( mbedtls_mpi_core_read_be( X, limbs,
input_X->x, input_X->len )
== 0 );
TEST_ASSERT( mbedtls_mpi_core_read_be( Y, limbs,
input_Y->x, input_Y->len )
== 0 );
/* condition is false */
TEST_CF_SECRET( X, bytes );
TEST_CF_SECRET( Y, bytes );
mbedtls_mpi_mod_raw_cond_assign( X, Y, &m, 0 );
TEST_CF_PUBLIC( X, bytes );
TEST_CF_PUBLIC( Y, bytes );
TEST_ASSERT( memcmp( X, Y, bytes ) != 0 );
/* condition is true */
TEST_CF_SECRET( X, bytes );
TEST_CF_SECRET( Y, bytes );
mbedtls_mpi_mod_raw_cond_assign( X, Y, &m, 1 );
TEST_CF_PUBLIC( X, bytes );
TEST_CF_PUBLIC( Y, bytes );
/* Check if the given length is copied even it is smaller
than the length of the given MPIs. */
if( copy_limbs <limbs )
{
ASSERT_COMPARE( X, copy_bytes, Y, copy_bytes );
TEST_ASSERT( memcmp( X, Y, bytes ) != 0 );
}
else
ASSERT_COMPARE( X, bytes, Y, bytes );
exit:
mbedtls_free( X );
mbedtls_free( Y );
mbedtls_mpi_mod_modulus_free( &m );
mbedtls_free( buff_m );
}
/* END_CASE */
/* BEGIN_CASE */
void mpi_mod_raw_cond_swap( data_t * input_X,
data_t * input_Y,
int input_bytes )
{
mbedtls_mpi_uint *tmp_X = NULL;
mbedtls_mpi_uint *tmp_Y = NULL;
mbedtls_mpi_uint *X = NULL;
mbedtls_mpi_uint *Y = NULL;
mbedtls_mpi_uint *buff_m = NULL;
mbedtls_mpi_mod_modulus m;
size_t limbs_X = CHARS_TO_LIMBS( input_X->len );
size_t limbs_Y = CHARS_TO_LIMBS( input_Y->len );
size_t limbs = limbs_X;
size_t copy_limbs = CHARS_TO_LIMBS( input_bytes );
size_t bytes = limbs * sizeof( mbedtls_mpi_uint );
size_t copy_bytes = copy_limbs * sizeof( mbedtls_mpi_uint );
mbedtls_mpi_mod_modulus_init( &m );
TEST_EQUAL( limbs_X, limbs_Y );
TEST_ASSERT( copy_limbs <= limbs );
ASSERT_ALLOC( tmp_X, limbs );
ASSERT_ALLOC( tmp_Y, limbs );
ASSERT_ALLOC( buff_m, copy_limbs );
TEST_ASSERT( mbedtls_mpi_mod_modulus_setup(
&m, buff_m, copy_limbs,
MBEDTLS_MPI_MOD_EXT_REP_BE,
MBEDTLS_MPI_MOD_REP_MONTGOMERY )
== 0 );
TEST_ASSERT( mbedtls_mpi_core_read_be( tmp_X, limbs, input_X->x, input_X->len )
== 0 );
ASSERT_ALLOC( X, limbs );
memcpy( X, tmp_X, bytes );
TEST_ASSERT( mbedtls_mpi_core_read_be( tmp_Y, limbs, input_Y->x, input_Y->len )
== 0 );
ASSERT_ALLOC( Y, bytes );
memcpy( Y, tmp_Y, bytes );
/* condition is false */
TEST_CF_SECRET( X, bytes );
TEST_CF_SECRET( Y, bytes );
mbedtls_mpi_mod_raw_cond_swap( X, Y, &m, 0 );
TEST_CF_PUBLIC( X, bytes );
TEST_CF_PUBLIC( Y, bytes );
ASSERT_COMPARE( X, bytes, tmp_X, bytes );
ASSERT_COMPARE( Y, bytes, tmp_Y, bytes );
/* condition is true */
TEST_CF_SECRET( X, bytes );
TEST_CF_SECRET( Y, bytes );
mbedtls_mpi_mod_raw_cond_swap( X, Y, &m, 1 );
TEST_CF_PUBLIC( X, bytes );
TEST_CF_PUBLIC( Y, bytes );
/* Check if the given length is copied even it is smaller
than the length of the given MPIs. */
if( copy_limbs < limbs )
{
ASSERT_COMPARE( X, copy_bytes, tmp_Y, copy_bytes );
ASSERT_COMPARE( Y, copy_bytes, tmp_X, copy_bytes );
TEST_ASSERT( memcmp( X, tmp_X, bytes ) != 0 );
TEST_ASSERT( memcmp( X, tmp_Y, bytes ) != 0 );
TEST_ASSERT( memcmp( Y, tmp_X, bytes ) != 0 );
TEST_ASSERT( memcmp( Y, tmp_Y, bytes ) != 0 );
}
else
{
ASSERT_COMPARE( X, bytes, tmp_Y, bytes );
ASSERT_COMPARE( Y, bytes, tmp_X, bytes );
}
exit:
mbedtls_free( tmp_X );
mbedtls_free( tmp_Y );
mbedtls_free( X );
mbedtls_free( Y );
mbedtls_mpi_mod_modulus_free( &m );
mbedtls_free( buff_m );
}
/* END_CASE */
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