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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 <sys/socket.h>
#include "crypto/s2n_sequence.h"
#include "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "tls/s2n_ktls.h"
#include "utils/s2n_random.h"
static S2N_RESULT s2n_test_get_seq_num(struct s2n_connection *conn, uint64_t *seq_num_out)
{
struct s2n_blob seq_num = { 0 };
RESULT_GUARD(s2n_connection_get_sequence_number(conn, conn->mode, &seq_num));
RESULT_GUARD_POSIX(s2n_sequence_number_to_uint64(&seq_num, seq_num_out));
return S2N_RESULT_OK;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
#ifdef S2N_LINUX_SENDFILE
const bool sendfile_supported = true;
#else
const bool sendfile_supported = false;
#endif
/* Test feature probe */
{
#if defined(__linux__)
EXPECT_TRUE(sendfile_supported);
#endif
#if defined(__FreeBSD__)
EXPECT_FALSE(sendfile_supported);
#endif
};
/* Safety */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
size_t bytes_written = 0;
EXPECT_FAILURE_WITH_ERRNO(
s2n_sendfile(NULL, 0, 0, 0, &bytes_written, &blocked),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(
s2n_sendfile(conn, 0, 0, 0, NULL, &blocked),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(
s2n_sendfile(conn, 0, 0, 0, &bytes_written, NULL),
S2N_ERR_NULL);
};
/* Test s2n_sendfile unsupported */
if (!sendfile_supported) {
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
conn->ktls_send_enabled = true;
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(conn, &io_pair));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
size_t bytes_written = 0;
int result = s2n_sendfile(conn, 1, 0, 1, &bytes_written, &blocked);
EXPECT_FAILURE_WITH_ERRNO(result, S2N_ERR_UNIMPLEMENTED);
/* We do not run any further tests */
END_TEST();
};
/* The one file we know definitely exists is our own executable */
int ro_file = open(argv[0], O_RDONLY);
EXPECT_TRUE(ro_file > 0);
/* use pread to read the beginning of the file without updating its offset.
* Careful: if any call to sendfile sets offset=NULL, the file's offset will
* be updated and different data will be read.
*/
uint8_t test_data[100] = { 0 };
EXPECT_EQUAL(pread(ro_file, test_data, sizeof(test_data), 0), sizeof(test_data));
/* Test: successful send */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
conn->ktls_send_enabled = true;
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
int write_fd = io_pair.server;
int read_fd = io_pair.client;
EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, write_fd));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
size_t bytes_written = 0;
EXPECT_SUCCESS(s2n_sendfile(conn, ro_file, 0, sizeof(test_data),
&bytes_written, &blocked));
EXPECT_EQUAL(bytes_written, sizeof(test_data));
EXPECT_EQUAL(blocked, S2N_NOT_BLOCKED);
uint8_t written[sizeof(test_data)] = { 0 };
EXPECT_EQUAL(read(read_fd, written, sizeof(written)), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(written, test_data, sizeof(test_data));
EXPECT_TRUE(read(read_fd, written, sizeof(written)) < 0);
};
/* Test: IO error */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
conn->ktls_send_enabled = true;
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
int write_fd = io_pair.server;
int read_fd = io_pair.client;
EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, write_fd));
/* Close one side of the stream to make the fds invalid */
close(read_fd);
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
size_t bytes_written = 0;
int ret = s2n_sendfile(conn, ro_file, 0, sizeof(test_data),
&bytes_written, &blocked);
EXPECT_FAILURE_WITH_ERRNO(ret, S2N_ERR_IO);
EXPECT_EQUAL(bytes_written, 0);
EXPECT_EQUAL(blocked, S2N_BLOCKED_ON_WRITE);
};
/* Test: send blocks */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
conn->ktls_send_enabled = true;
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
int write_fd = io_pair.server;
EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, write_fd));
/* We can force the socket to block by filling up its send buffer. */
int buffer_size = 0;
socklen_t optlen = sizeof(buffer_size);
EXPECT_EQUAL(getsockopt(write_fd, SOL_SOCKET, SO_SNDBUF, &buffer_size, &optlen), 0);
EXPECT_TRUE(buffer_size > 0);
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
size_t bytes_written = 0;
size_t total_bytes_written = 0;
while (true) {
int result = s2n_sendfile(conn, ro_file, 0, sizeof(test_data),
&bytes_written, &blocked);
if (result < 0) {
EXPECT_FAILURE_WITH_ERRNO(result, S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(bytes_written, 0);
EXPECT_EQUAL(blocked, S2N_BLOCKED_ON_WRITE);
break;
}
EXPECT_TRUE(bytes_written <= sizeof(test_data));
EXPECT_TRUE(bytes_written > 0);
EXPECT_EQUAL(blocked, S2N_NOT_BLOCKED);
total_bytes_written += bytes_written;
/* The socket will block before buffer_size bytes are written.
* If we successfully send buffer_size bytes, something is wrong.
*/
EXPECT_TRUE(total_bytes_written < buffer_size);
}
};
/* Test: partial write */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
conn->ktls_send_enabled = true;
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
int write_fd = io_pair.server;
EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, write_fd));
int buffer_size = 0;
socklen_t optlen = sizeof(buffer_size);
EXPECT_EQUAL(getsockopt(write_fd, SOL_SOCKET, SO_SNDBUF, &buffer_size, &optlen), 0);
EXPECT_TRUE(buffer_size > 0);
/* Try to write more data than the buffer can hold in a single sendfile call */
size_t bytes_to_write = buffer_size * 2;
size_t bytes_written = 0;
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
EXPECT_SUCCESS(s2n_sendfile(conn, ro_file, 0, bytes_to_write,
&bytes_written, &blocked));
EXPECT_TRUE(bytes_written > 0);
EXPECT_TRUE(bytes_written < bytes_to_write);
EXPECT_EQUAL(blocked, S2N_NOT_BLOCKED);
};
/* Test: key encryption limit tracked */
{
struct s2n_record_algorithm test_record_alg = *s2n_tls13_aes_128_gcm_sha256.record_alg;
test_record_alg.encryption_limit = 0;
struct s2n_cipher_suite test_cipher_suite = s2n_tls13_aes_128_gcm_sha256;
test_cipher_suite.record_alg = &test_record_alg;
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
conn->ktls_send_enabled = true;
conn->actual_protocol_version = S2N_TLS13;
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, io_pair.server));
/* Test: The sequence number starts at 0 */
uint64_t seq_num = 1;
EXPECT_OK(s2n_test_get_seq_num(conn, &seq_num));
EXPECT_EQUAL(seq_num, 0);
/* Test: The sequence number tracks data sent */
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
size_t bytes_written = 0;
EXPECT_SUCCESS(s2n_sendfile(conn, ro_file, 0, sizeof(test_data),
&bytes_written, &blocked));
EXPECT_OK(s2n_test_get_seq_num(conn, &seq_num));
EXPECT_TRUE(seq_num > 0);
/* Test: Enforce the encryption limit */
EXPECT_NOT_NULL(conn->secure);
conn->secure->cipher_suite = &test_cipher_suite;
EXPECT_FAILURE_WITH_ERRNO(
s2n_sendfile(conn, ro_file, 0, sizeof(test_data), &bytes_written, &blocked),
S2N_ERR_KTLS_KEY_LIMIT);
};
EXPECT_EQUAL(close(ro_file), 0);
END_TEST();
}
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