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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 <fcntl.h>
#include <stdint.h>
#include <sys/wait.h>
#include <unistd.h>
#include "api/s2n.h"
#include "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "tls/s2n_connection.h"
#include "tls/s2n_handshake.h"
int mock_client(struct s2n_test_io_pair *io_pair, uint8_t version)
{
struct s2n_connection *client_conn;
struct s2n_config *client_config;
s2n_blocked_status blocked;
int result = 0;
client_config = s2n_config_new();
s2n_config_disable_x509_verification(client_config);
client_conn = s2n_connection_new(S2N_CLIENT);
s2n_connection_set_config(client_conn, client_config);
s2n_connection_set_blinding(client_conn, S2N_SELF_SERVICE_BLINDING);
/* Force TLSv1 on a client so that server will fail handshake */
client_conn->client_protocol_version = S2N_TLS10;
if (version >= S2N_TLS13) {
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(client_config, "test_all"));
} else {
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(client_config, "test_all_tls12"));
}
s2n_connection_set_io_pair(client_conn, io_pair);
result = s2n_negotiate(client_conn, &blocked);
s2n_io_pair_close_one_end(io_pair, S2N_CLIENT);
s2n_connection_free(client_conn);
s2n_config_free(client_config);
s2n_cleanup();
/* Expect failure of handshake */
exit(result == 0 ? 1 : 0);
}
int main(int argc, char **argv)
{
s2n_blocked_status blocked;
int status;
pid_t pid;
char cert_chain_pem[S2N_MAX_TEST_PEM_SIZE];
char private_key_pem[S2N_MAX_TEST_PEM_SIZE];
BEGIN_TEST();
EXPECT_SUCCESS(s2n_read_test_pem(S2N_DEFAULT_TEST_CERT_CHAIN, cert_chain_pem, S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(s2n_read_test_pem(S2N_DEFAULT_TEST_PRIVATE_KEY, private_key_pem, S2N_MAX_TEST_PEM_SIZE));
/* TLS1.2 and TLS1.3 have different version negotiation mechanisms.
* We should test both.
*/
for (uint8_t version = S2N_TLS12; version <= S2N_TLS13; version++) {
/* Create a pipe */
struct s2n_test_io_pair io_pair;
EXPECT_SUCCESS(s2n_io_pair_init(&io_pair));
/* Create a child process */
pid = fork();
if (pid == 0) {
/* This is the client process, close the server end of the pipe */
EXPECT_SUCCESS(s2n_io_pair_close_one_end(&io_pair, S2N_SERVER));
/* Send the client hello with TLSv1 and validate that we failed handshake */
mock_client(&io_pair, version);
}
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(),
s2n_config_ptr_free);
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain_and_key = s2n_cert_chain_and_key_new(),
s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_pem(chain_and_key, cert_chain_pem, private_key_pem));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, chain_and_key));
/* Pick cipher preference with TLSv1.2 as a minimum version */
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(config, "CloudFront-TLS-1-2-2019"));
/* This is the server process, close the client end of the pipe */
EXPECT_SUCCESS(s2n_io_pair_close_one_end(&io_pair, S2N_CLIENT));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
EXPECT_SUCCESS(s2n_connection_set_blinding(conn, S2N_SELF_SERVICE_BLINDING));
/* Set up the connection to read from the fd */
EXPECT_SUCCESS(s2n_connection_set_io_pair(conn, &io_pair));
/* Negotiate the handshake. */
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked), S2N_ERR_PROTOCOL_VERSION_UNSUPPORTED);
/* Check that blinding was not invoked */
EXPECT_EQUAL(s2n_connection_get_delay(conn), 0);
/* Close the pipes */
EXPECT_SUCCESS(s2n_io_pair_close_one_end(&io_pair, S2N_SERVER));
/* Clean up */
EXPECT_EQUAL(waitpid(-1, &status, 0), pid);
EXPECT_EQUAL(status, 0);
}
END_TEST();
}
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