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Test failing raw_key_agreement in ssl mock tests

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Force a bitflip in server key to make the raw key
agreement fail, and then verify that no key slots
are left open at the end. Use a Weierstrass curve
to have a high chance of failure upon encountering
such bitflip.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
This commit is contained in:
Andrzej Kurek 2022-04-15 05:41:14 -04:00
parent 535cd1790b
commit b4eedf7a23
2 changed files with 79 additions and 0 deletions
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3
tests/suites/test_suite_ssl.data
View File

@ -10683,3 +10683,6 @@ ssl_cf_memcpy_offset:0:255:32
# we could get this with 255-bytes plaintext and untruncated SHA-384 # we could get this with 255-bytes plaintext and untruncated SHA-384
Constant-flow memcpy from offset: large Constant-flow memcpy from offset: large
ssl_cf_memcpy_offset:100:339:48 ssl_cf_memcpy_offset:100:339:48
Raw key agreement fail
raw_key_agreement_fail:

76
tests/suites/test_suite_ssl.function
View File

@ -4555,3 +4555,79 @@ exit:
mbedtls_free( src ); mbedtls_free( src );
} }
/* END_CASE */ /* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_USE_PSA_CRYPTO */
void raw_key_agreement_fail( )
{
enum { BUFFSIZE = 17000 };
mbedtls_endpoint client, server;
mbedtls_psa_stats_t stats;
#if defined(MBEDTLS_TIMING_C)
mbedtls_timing_delay_context timer_client, timer_server;
#endif
mbedtls_ecp_group_id curve_list[] = { MBEDTLS_ECP_DP_SECP256R1,
MBEDTLS_ECP_DP_NONE };
mbedtls_test_message_queue server_queue, client_queue;
mbedtls_test_message_socket_context server_context, client_context;
mbedtls_message_socket_init( &server_context );
mbedtls_message_socket_init( &client_context );
USE_PSA_INIT( );
/* Client side, force SECP256R1 to make one key bitflip fail
* the raw key agreement. Flipping one bit with a Weierstrass
* curve (as opposed to a Montgomery curve) has a high chance of
* making it invalid. */
TEST_ASSERT( mbedtls_endpoint_init( &client, MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_PK_RSA, &client_context,
&client_queue,
&server_queue, curve_list ) == 0 );
#if defined(MBEDTLS_TIMING_C)
mbedtls_ssl_set_timer_cb( &client.ssl, &timer_client,
mbedtls_timing_set_delay,
mbedtls_timing_get_delay );
#endif
/* Server side */
TEST_ASSERT( mbedtls_endpoint_init( &server, MBEDTLS_SSL_IS_SERVER,
MBEDTLS_PK_RSA, &server_context,
&server_queue,
&client_queue, NULL ) == 0 );
#if defined(MBEDTLS_TIMING_C)
mbedtls_ssl_set_timer_cb( &server.ssl, &timer_server,
mbedtls_timing_set_delay,
mbedtls_timing_get_delay );
#endif
TEST_ASSERT( mbedtls_mock_socket_connect( &(client.socket),
&(server.socket),
BUFFSIZE ) == 0 );
TEST_ASSERT( mbedtls_move_handshake_to_state( &(client.ssl),
&(server.ssl),
MBEDTLS_SSL_CLIENT_KEY_EXCHANGE )
== 0 );
/* Force a simulated bitflip in the server key. to make the
* raw key agreement in ssl_write_client_key_exchange fail. */
(client.ssl).handshake->ecdh_psa_peerkey[5] ^= 0x02;
TEST_ASSERT( mbedtls_move_handshake_to_state( &(client.ssl),
&(server.ssl),
MBEDTLS_SSL_HANDSHAKE_OVER )
!= 0 );
mbedtls_psa_get_stats( &stats );
/* Make sure that the key slot is destroyed properly in case of failure. */
TEST_ASSERT( stats.empty_slots == MBEDTLS_PSA_KEY_SLOT_COUNT );
exit:
mbedtls_endpoint_free( &client, &client_context );
mbedtls_endpoint_free( &server, &server_context );
USE_PSA_DONE( );
}
/* END_CASE */