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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include "api/s2n.h"
#include "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "utils/s2n_result.h"
int main(int argc, char **argv)
{
BEGIN_TEST();
/* IO blocking on read does not close connection or invoke blinding */
{
struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_blinding(server_conn, S2N_SELF_SERVICE_BLINDING));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(server_conn, "default_tls13"));
DEFER_CLEANUP(struct s2n_stuffer io_stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&io_stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&io_stuffer, &io_stuffer, server_conn));
/* Try to read the ClientHello, which hasn't been written yet */
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(server_conn, &blocked), S2N_ERR_IO_BLOCKED);
/* Error did not close connection */
EXPECT_TRUE(s2n_connection_check_io_status(server_conn, S2N_IO_FULL_DUPLEX));
/* Error did not trigger blinding */
EXPECT_EQUAL(s2n_connection_get_delay(server_conn), 0);
EXPECT_SUCCESS(s2n_connection_free(server_conn));
};
/* Failure in read handler closes connection and invokes blinding */
{
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(client_conn, "default_tls13"));
struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_blinding(server_conn, S2N_SELF_SERVICE_BLINDING));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(server_conn, "default_tls13"));
DEFER_CLEANUP(struct s2n_stuffer io_stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&io_stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&io_stuffer, &io_stuffer, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&io_stuffer, &io_stuffer, server_conn));
/* Write the ClientHello */
EXPECT_OK(s2n_negotiate_until_message(client_conn, &blocked, SERVER_HELLO));
/* Overwrite everything except the headers */
uint32_t content_size = s2n_stuffer_data_available(&io_stuffer)
- S2N_TLS_RECORD_HEADER_LENGTH - TLS_HANDSHAKE_HEADER_LENGTH;
EXPECT_SUCCESS(s2n_stuffer_wipe_n(&io_stuffer, content_size));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&io_stuffer, content_size));
/* Read the ClientHello */
EXPECT_ERROR_WITH_ERRNO(s2n_negotiate_until_message(server_conn, &blocked, SERVER_HELLO),
S2N_ERR_BAD_MESSAGE);
/* Error closes connection */
EXPECT_TRUE(s2n_connection_check_io_status(server_conn, S2N_IO_CLOSED));
/* Error triggers blinding */
EXPECT_NOT_EQUAL(s2n_connection_get_delay(server_conn), 0);
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
};
/* Decrypt failure closes connection and invokes blinding */
{
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(client_conn, "default_tls13"));
struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_blinding(server_conn, S2N_SELF_SERVICE_BLINDING));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(server_conn, "default_tls13"));
DEFER_CLEANUP(struct s2n_stuffer io_stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&io_stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&io_stuffer, &io_stuffer, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&io_stuffer, &io_stuffer, server_conn));
/* Write the ClientHello */
EXPECT_OK(s2n_negotiate_until_message(client_conn, &blocked, SERVER_HELLO));
/* Set up encryption on the server */
EXPECT_OK(s2n_connection_set_secrets(server_conn));
/* Read the ClientHello */
EXPECT_ERROR_WITH_ERRNO(s2n_negotiate_until_message(server_conn, &blocked, SERVER_HELLO),
S2N_ERR_DECRYPT);
/* Error closes connection */
EXPECT_TRUE(s2n_connection_check_io_status(server_conn, S2N_IO_CLOSED));
/* Error triggers blinding */
EXPECT_NOT_EQUAL(s2n_connection_get_delay(server_conn), 0);
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
};
END_TEST();
}
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