23e416261c
This is mainly for the benefit of SSL modules, which only supports restart in a limited number of cases. In the other cases (ECDHE_PSK) it would currently return ERR_ECP_IN_PROGRESS and the user would thus call ssl_handshake() again, but the SSL code wouldn't handle state properly and things would go wrong in possibly unexpected ways. This is undesirable, so it should be possible for the SSL module to choose if ECDHE should behave the old or the new way. Not that it also brings ECDHE more in line with the other modules which already have that choice available (by passing a NULL or valid restart context).
278 lines
9.2 KiB
Plaintext
278 lines
9.2 KiB
Plaintext
/* BEGIN_HEADER */
|
|
#include "mbedtls/ecdh.h"
|
|
/* END_HEADER */
|
|
|
|
/* BEGIN_DEPENDENCIES
|
|
* depends_on:MBEDTLS_ECDH_C
|
|
* END_DEPENDENCIES
|
|
*/
|
|
|
|
/* BEGIN_CASE */
|
|
void ecdh_primitive_random( int id )
|
|
{
|
|
mbedtls_ecp_group grp;
|
|
mbedtls_ecp_point qA, qB;
|
|
mbedtls_mpi dA, dB, zA, zB;
|
|
rnd_pseudo_info rnd_info;
|
|
|
|
mbedtls_ecp_group_init( &grp );
|
|
mbedtls_ecp_point_init( &qA ); mbedtls_ecp_point_init( &qB );
|
|
mbedtls_mpi_init( &dA ); mbedtls_mpi_init( &dB );
|
|
mbedtls_mpi_init( &zA ); mbedtls_mpi_init( &zB );
|
|
memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) );
|
|
|
|
TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
|
|
|
|
TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dA, &qA, &rnd_pseudo_rand, &rnd_info )
|
|
== 0 );
|
|
TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dB, &qB, &rnd_pseudo_rand, &rnd_info )
|
|
== 0 );
|
|
TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zA, &qB, &dA,
|
|
&rnd_pseudo_rand, &rnd_info ) == 0 );
|
|
TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zB, &qA, &dB,
|
|
NULL, NULL ) == 0 );
|
|
|
|
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zA, &zB ) == 0 );
|
|
|
|
exit:
|
|
mbedtls_ecp_group_free( &grp );
|
|
mbedtls_ecp_point_free( &qA ); mbedtls_ecp_point_free( &qB );
|
|
mbedtls_mpi_free( &dA ); mbedtls_mpi_free( &dB );
|
|
mbedtls_mpi_free( &zA ); mbedtls_mpi_free( &zB );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void ecdh_primitive_testvec( int id, char *dA_str, char *xA_str, char *yA_str,
|
|
char *dB_str, char *xB_str, char *yB_str,
|
|
char *z_str )
|
|
{
|
|
mbedtls_ecp_group grp;
|
|
mbedtls_ecp_point qA, qB;
|
|
mbedtls_mpi dA, dB, zA, zB, check;
|
|
unsigned char rnd_buf_A[MBEDTLS_ECP_MAX_BYTES];
|
|
unsigned char rnd_buf_B[MBEDTLS_ECP_MAX_BYTES];
|
|
rnd_buf_info rnd_info_A, rnd_info_B;
|
|
|
|
mbedtls_ecp_group_init( &grp );
|
|
mbedtls_ecp_point_init( &qA ); mbedtls_ecp_point_init( &qB );
|
|
mbedtls_mpi_init( &dA ); mbedtls_mpi_init( &dB );
|
|
mbedtls_mpi_init( &zA ); mbedtls_mpi_init( &zB ); mbedtls_mpi_init( &check );
|
|
|
|
TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
|
|
|
|
rnd_info_A.buf = rnd_buf_A;
|
|
rnd_info_A.length = unhexify( rnd_buf_A, dA_str );
|
|
|
|
/* Fix rnd_buf_A by shifting it left if necessary */
|
|
if( grp.nbits % 8 != 0 )
|
|
{
|
|
unsigned char shift = 8 - ( grp.nbits % 8 );
|
|
size_t i;
|
|
|
|
for( i = 0; i < rnd_info_A.length - 1; i++ )
|
|
rnd_buf_A[i] = rnd_buf_A[i] << shift
|
|
| rnd_buf_A[i+1] >> ( 8 - shift );
|
|
|
|
rnd_buf_A[rnd_info_A.length-1] <<= shift;
|
|
}
|
|
|
|
rnd_info_B.buf = rnd_buf_B;
|
|
rnd_info_B.length = unhexify( rnd_buf_B, dB_str );
|
|
|
|
/* Fix rnd_buf_B by shifting it left if necessary */
|
|
if( grp.nbits % 8 != 0 )
|
|
{
|
|
unsigned char shift = 8 - ( grp.nbits % 8 );
|
|
size_t i;
|
|
|
|
for( i = 0; i < rnd_info_B.length - 1; i++ )
|
|
rnd_buf_B[i] = rnd_buf_B[i] << shift
|
|
| rnd_buf_B[i+1] >> ( 8 - shift );
|
|
|
|
rnd_buf_B[rnd_info_B.length-1] <<= shift;
|
|
}
|
|
|
|
TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dA, &qA,
|
|
rnd_buffer_rand, &rnd_info_A ) == 0 );
|
|
TEST_ASSERT( ! mbedtls_ecp_is_zero( &qA ) );
|
|
TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, xA_str ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qA.X, &check ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, yA_str ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qA.Y, &check ) == 0 );
|
|
|
|
TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dB, &qB,
|
|
rnd_buffer_rand, &rnd_info_B ) == 0 );
|
|
TEST_ASSERT( ! mbedtls_ecp_is_zero( &qB ) );
|
|
TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, xB_str ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qB.X, &check ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, yB_str ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qB.Y, &check ) == 0 );
|
|
|
|
TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, z_str ) == 0 );
|
|
TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zA, &qB, &dA, NULL, NULL ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zA, &check ) == 0 );
|
|
TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zB, &qA, &dB, NULL, NULL ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zB, &check ) == 0 );
|
|
|
|
exit:
|
|
mbedtls_ecp_group_free( &grp );
|
|
mbedtls_ecp_point_free( &qA ); mbedtls_ecp_point_free( &qB );
|
|
mbedtls_mpi_free( &dA ); mbedtls_mpi_free( &dB );
|
|
mbedtls_mpi_free( &zA ); mbedtls_mpi_free( &zB ); mbedtls_mpi_free( &check );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE */
|
|
void ecdh_exchange( int id )
|
|
{
|
|
mbedtls_ecdh_context srv, cli;
|
|
unsigned char buf[1000];
|
|
const unsigned char *vbuf;
|
|
size_t len;
|
|
rnd_pseudo_info rnd_info;
|
|
|
|
mbedtls_ecdh_init( &srv );
|
|
mbedtls_ecdh_init( &cli );
|
|
memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) );
|
|
|
|
TEST_ASSERT( mbedtls_ecp_group_load( &srv.grp, id ) == 0 );
|
|
|
|
memset( buf, 0x00, sizeof( buf ) ); vbuf = buf;
|
|
TEST_ASSERT( mbedtls_ecdh_make_params( &srv, &len, buf, 1000,
|
|
&rnd_pseudo_rand, &rnd_info ) == 0 );
|
|
TEST_ASSERT( mbedtls_ecdh_read_params( &cli, &vbuf, buf + len ) == 0 );
|
|
|
|
memset( buf, 0x00, sizeof( buf ) );
|
|
TEST_ASSERT( mbedtls_ecdh_make_public( &cli, &len, buf, 1000,
|
|
&rnd_pseudo_rand, &rnd_info ) == 0 );
|
|
TEST_ASSERT( mbedtls_ecdh_read_public( &srv, buf, len ) == 0 );
|
|
|
|
TEST_ASSERT( mbedtls_ecdh_calc_secret( &srv, &len, buf, 1000,
|
|
&rnd_pseudo_rand, &rnd_info ) == 0 );
|
|
TEST_ASSERT( mbedtls_ecdh_calc_secret( &cli, &len, buf, 1000, NULL, NULL ) == 0 );
|
|
TEST_ASSERT( mbedtls_mpi_cmp_mpi( &srv.z, &cli.z ) == 0 );
|
|
|
|
exit:
|
|
mbedtls_ecdh_free( &srv );
|
|
mbedtls_ecdh_free( &cli );
|
|
}
|
|
/* END_CASE */
|
|
|
|
/* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE */
|
|
void ecdh_restart( int id, char *dA_str, char *dB_str, char *z_str,
|
|
int enable, int max_ops, int min_restart, int max_restart )
|
|
{
|
|
int ret;
|
|
mbedtls_ecdh_context srv, cli;
|
|
unsigned char buf[1000];
|
|
const unsigned char *vbuf;
|
|
size_t len;
|
|
unsigned char z[MBEDTLS_ECP_MAX_BYTES];
|
|
size_t z_len;
|
|
unsigned char rnd_buf_A[MBEDTLS_ECP_MAX_BYTES];
|
|
unsigned char rnd_buf_B[MBEDTLS_ECP_MAX_BYTES];
|
|
rnd_buf_info rnd_info_A, rnd_info_B;
|
|
int cnt_restart;
|
|
|
|
mbedtls_ecdh_init( &srv );
|
|
mbedtls_ecdh_init( &cli );
|
|
|
|
z_len = unhexify( z, z_str );
|
|
|
|
rnd_info_A.buf = rnd_buf_A;
|
|
rnd_info_A.length = unhexify( rnd_buf_A, dA_str );
|
|
|
|
rnd_info_B.buf = rnd_buf_B;
|
|
rnd_info_B.length = unhexify( rnd_buf_B, dB_str );
|
|
|
|
TEST_ASSERT( mbedtls_ecp_group_load( &srv.grp, id ) == 0 );
|
|
|
|
/* otherwise we would have to fix the random buffer,
|
|
* as in ecdh_primitive_test_vec */
|
|
TEST_ASSERT( srv.grp.nbits % 8 == 0 );
|
|
|
|
/* set up restart parameters */
|
|
mbedtls_ecp_set_max_ops( max_ops );
|
|
|
|
if( enable)
|
|
{
|
|
mbedtls_ecdh_enable_restart( &srv );
|
|
mbedtls_ecdh_enable_restart( &cli );
|
|
}
|
|
|
|
/* server writes its paramaters */
|
|
memset( buf, 0x00, sizeof( buf ) );
|
|
len = 0;
|
|
|
|
cnt_restart = 0;
|
|
do {
|
|
ret = mbedtls_ecdh_make_params( &srv, &len, buf, sizeof( buf ),
|
|
rnd_buffer_rand, &rnd_info_A );
|
|
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
|
|
|
|
TEST_ASSERT( ret == 0 );
|
|
TEST_ASSERT( cnt_restart >= min_restart );
|
|
TEST_ASSERT( cnt_restart <= max_restart );
|
|
|
|
/* client read server params */
|
|
vbuf = buf;
|
|
TEST_ASSERT( mbedtls_ecdh_read_params( &cli, &vbuf, buf + len ) == 0 );
|
|
|
|
/* client writes its key share */
|
|
memset( buf, 0x00, sizeof( buf ) );
|
|
len = 0;
|
|
|
|
cnt_restart = 0;
|
|
do {
|
|
ret = mbedtls_ecdh_make_public( &cli, &len, buf, sizeof( buf ),
|
|
rnd_buffer_rand, &rnd_info_B );
|
|
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
|
|
|
|
TEST_ASSERT( ret == 0 );
|
|
TEST_ASSERT( cnt_restart >= min_restart );
|
|
TEST_ASSERT( cnt_restart <= max_restart );
|
|
|
|
/* server reads client key share */
|
|
TEST_ASSERT( mbedtls_ecdh_read_public( &srv, buf, len ) == 0 );
|
|
|
|
/* server computes shared secret */
|
|
memset( buf, 0, sizeof( buf ) );
|
|
len = 0;
|
|
|
|
cnt_restart = 0;
|
|
do {
|
|
ret = mbedtls_ecdh_calc_secret( &srv, &len, buf, sizeof( buf ),
|
|
NULL, NULL );
|
|
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
|
|
|
|
TEST_ASSERT( ret == 0 );
|
|
TEST_ASSERT( cnt_restart >= min_restart );
|
|
TEST_ASSERT( cnt_restart <= max_restart );
|
|
|
|
TEST_ASSERT( len == z_len );
|
|
TEST_ASSERT( memcmp( buf, z, len ) == 0 );
|
|
|
|
/* client computes shared secret */
|
|
memset( buf, 0, sizeof( buf ) );
|
|
len = 0;
|
|
|
|
cnt_restart = 0;
|
|
do {
|
|
ret = mbedtls_ecdh_calc_secret( &cli, &len, buf, sizeof( buf ),
|
|
NULL, NULL );
|
|
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
|
|
|
|
TEST_ASSERT( ret == 0 );
|
|
TEST_ASSERT( cnt_restart >= min_restart );
|
|
TEST_ASSERT( cnt_restart <= max_restart );
|
|
|
|
TEST_ASSERT( len == z_len );
|
|
TEST_ASSERT( memcmp( buf, z, len ) == 0 );
|
|
|
|
exit:
|
|
mbedtls_ecdh_free( &srv );
|
|
mbedtls_ecdh_free( &cli );
|
|
}
|
|
/* END_CASE */
|