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Introduce muladd_restartable() and its sub-context

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Only the administrative parts for now, not actually restartable so far.
This commit is contained in:
Manuel Pégourié-Gonnard 2017-04-20 13:36:18 +02:00
parent a08cd1a77f
commit 54dd6527f0
4 changed files with 199 additions and 13 deletions
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71
tests/suites/test_suite_ecp.function
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@ -145,6 +145,77 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_ECP_EARLY_RETURN */
void ecp_muladd_restart( int id, char *xR_str, char *yR_str,
char *u1_str, char *u2_str,
char *xQ_str, char *yQ_str,
int max_ops, int min_restarts, int max_restarts )
{
/*
* Compute R = u1 * G + u2 * Q
* (test vectors mostly taken from ECDSA intermediate results)
*
* See comments at the top of ecp_test_vect_restart()
*/
mbedtls_ecp_restart_ctx ctx;
mbedtls_ecp_group grp;
mbedtls_ecp_point R, Q;
mbedtls_mpi u1, u2, xR, yR;
int cnt_restarts;
int ret;
mbedtls_ecp_restart_init( &ctx );
mbedtls_ecp_group_init( &grp );
mbedtls_ecp_point_init( &R );
mbedtls_ecp_point_init( &Q );
mbedtls_mpi_init( &u1 ); mbedtls_mpi_init( &u2 );
mbedtls_mpi_init( &xR ); mbedtls_mpi_init( &yR );
TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
TEST_ASSERT( mbedtls_mpi_read_string( &u1, 16, u1_str ) == 0 );
TEST_ASSERT( mbedtls_mpi_read_string( &u2, 16, u2_str ) == 0 );
TEST_ASSERT( mbedtls_mpi_read_string( &xR, 16, xR_str ) == 0 );
TEST_ASSERT( mbedtls_mpi_read_string( &yR, 16, yR_str ) == 0 );
TEST_ASSERT( mbedtls_mpi_read_string( &Q.X, 16, xQ_str ) == 0 );
TEST_ASSERT( mbedtls_mpi_read_string( &Q.Y, 16, yQ_str ) == 0 );
TEST_ASSERT( mbedtls_mpi_lset( &Q.Z, 1 ) == 0 );
mbedtls_ecp_set_max_ops( (unsigned) max_ops );
cnt_restarts = 0;
do {
ret = mbedtls_ecp_muladd_restartable( &grp, &R,
&u1, &grp.G, &u2, &Q, &ctx );
TEST_ASSERT( ret == 0 || ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
cnt_restarts++;
}
while( ret != 0 );
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &R.X, &xR ) == 0 );
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &R.Y, &yR ) == 0 );
TEST_ASSERT( cnt_restarts >= min_restarts );
TEST_ASSERT( cnt_restarts <= max_restarts );
/* Do we leak memory when aborting? */
ret = mbedtls_ecp_muladd_restartable( &grp, &R,
&u1, &grp.G, &u2, &Q, &ctx );
TEST_ASSERT( ret == 0 || ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
exit:
mbedtls_ecp_restart_free( &ctx );
mbedtls_ecp_group_free( &grp );
mbedtls_ecp_point_free( &R );
mbedtls_ecp_point_free( &Q );
mbedtls_mpi_free( &u1 ); mbedtls_mpi_free( &u2 );
mbedtls_mpi_free( &xR ); mbedtls_mpi_free( &yR );
}
/* END_CASE */
/* BEGIN_CASE */
void ecp_test_vect( int id, char *dA_str, char *xA_str, char *yA_str,
char *dB_str, char *xB_str, char *yB_str, char *xZ_str,