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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 <stdint.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <time.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"
#define SUPPORTED_CERTIFICATE_FORMATS (2)
static const char *certificate_paths[SUPPORTED_CERTIFICATE_FORMATS] = { S2N_RSA_2048_PKCS1_CERT_CHAIN, S2N_RSA_2048_PKCS8_CERT_CHAIN };
static const char *private_key_paths[SUPPORTED_CERTIFICATE_FORMATS] = { S2N_RSA_2048_PKCS1_KEY, S2N_RSA_2048_PKCS8_KEY };
void mock_client(struct s2n_test_io_pair *io_pair)
{
struct s2n_connection *conn;
struct s2n_config *config;
s2n_blocked_status blocked;
/* Give the server a chance to listen */
sleep(1);
conn = s2n_connection_new(S2N_CLIENT);
config = s2n_config_new();
s2n_config_disable_x509_verification(config);
s2n_connection_set_config(conn, config);
s2n_connection_set_io_pair(conn, io_pair);
int result = s2n_negotiate(conn, &blocked);
if (result < 0) {
exit(1);
}
result = s2n_connection_free_handshake(conn);
if (result < 0) {
exit(1);
}
#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__OpenBSD__)
/* On FreeBSD shutdown from one end of the socket pair does not give EPIPE. Must use close. */
s2n_io_pair_close_one_end(io_pair, S2N_CLIENT);
#else
/* Close client read fd to mock half closed pipe at server side */
s2n_io_pair_shutdown_one_end(io_pair, S2N_CLIENT, SHUT_RD);
#endif
/* Give server a chance to send data on broken pipe */
sleep(2);
s2n_shutdown(conn, &blocked);
result = s2n_connection_free(conn);
if (result < 0) {
exit(1);
}
result = s2n_config_free(config);
if (result < 0) {
exit(1);
}
/* Give the server a chance to avoid a sigpipe */
sleep(1);
s2n_io_pair_shutdown_one_end(io_pair, S2N_CLIENT, SHUT_WR);
exit(0);
}
int main(int argc, char **argv)
{
struct s2n_connection *conn;
struct s2n_config *config;
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];
char dhparams_pem[S2N_MAX_TEST_PEM_SIZE];
BEGIN_TEST();
for (int is_dh_key_exchange = 0; is_dh_key_exchange <= 1; is_dh_key_exchange++) {
struct s2n_cert_chain_and_key *chain_and_keys[SUPPORTED_CERTIFICATE_FORMATS];
/* 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));
/* Write the fragmented hello message */
mock_client(&io_pair);
}
/* 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_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(config, "default"));
for (int cert = 0; cert < SUPPORTED_CERTIFICATE_FORMATS; cert++) {
EXPECT_SUCCESS(s2n_read_test_pem(certificate_paths[cert], cert_chain_pem, S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(s2n_read_test_pem(private_key_paths[cert], private_key_pem, S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(chain_and_keys[cert] = s2n_cert_chain_and_key_new());
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_pem(chain_and_keys[cert], cert_chain_pem, private_key_pem));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, chain_and_keys[cert]));
}
if (is_dh_key_exchange) {
EXPECT_SUCCESS(s2n_read_test_pem(S2N_DEFAULT_TEST_DHPARAMS, dhparams_pem, S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(s2n_config_add_dhparams(config, dhparams_pem));
}
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
/* Set up the connection to read from the fd */
EXPECT_SUCCESS(s2n_connection_set_io_pair(conn, &io_pair));
/* Negotiate the handshake. */
EXPECT_SUCCESS(s2n_negotiate(conn, &blocked));
EXPECT_EQUAL(conn->actual_protocol_version, S2N_TLS12);
/* Give client a chance to close pipe at the receiving end */
sleep(1);
char buffer[1];
/* Fist flush on half closed pipe should get EPIPE */
ssize_t w = s2n_send(conn, buffer, 1, &blocked);
EXPECT_EQUAL(w, -1);
EXPECT_EQUAL(s2n_errno, S2N_ERR_IO);
EXPECT_EQUAL(errno, EPIPE);
/* Second flush on half closed pipe should not get EPIPE as we write is skipped */
w = s2n_shutdown(conn, &blocked);
EXPECT_EQUAL(w, -1);
EXPECT_EQUAL(s2n_errno, S2N_ERR_IO);
EXPECT_EQUAL(errno, 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
for (int cert = 0; cert < SUPPORTED_CERTIFICATE_FORMATS; cert++) {
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(chain_and_keys[cert]));
}
EXPECT_SUCCESS(s2n_config_free(config));
/* Clean up */
EXPECT_EQUAL(waitpid(-1, &status, 0), pid);
if (getenv("S2N_VALGRIND") == NULL) {
EXPECT_EQUAL(status, 0);
}
EXPECT_SUCCESS(s2n_io_pair_close_one_end(&io_pair, S2N_SERVER));
}
END_TEST();
return 0;
}
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