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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 "api/unstable/renegotiate.h"
#include "s2n_test.h"
#include "testlib/s2n_ktls_test_utils.h"
#include "testlib/s2n_testlib.h"
#include "utils/s2n_random.h"
struct s2n_recv_wrapper {
size_t count;
s2n_recv_fn *inner_recv;
void *inner_recv_ctx;
};
static int s2n_counting_read(void *io_context, uint8_t *buf, uint32_t len)
{
struct s2n_recv_wrapper *context = (struct s2n_recv_wrapper *) io_context;
context->count++;
return context->inner_recv(context->inner_recv_ctx, buf, len);
}
static S2N_RESULT s2n_connection_set_counting_read(struct s2n_connection *reader,
struct s2n_recv_wrapper *wrapper)
{
/* We'd need to handle cleanup for managed IO */
RESULT_ENSURE(!reader->managed_recv_io, S2N_ERR_SAFETY);
wrapper->inner_recv = reader->recv;
reader->recv = s2n_counting_read;
wrapper->inner_recv_ctx = reader->recv_io_context;
reader->recv_io_context = wrapper;
wrapper->count = 0;
return S2N_RESULT_OK;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
const uint8_t test_data[20] = "hello world";
const size_t buffer_in_size = S2N_LARGE_FRAGMENT_LENGTH;
DEFER_CLEANUP(struct s2n_cert_chain_and_key * chain_and_key,
s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&chain_and_key,
S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN, S2N_DEFAULT_ECDSA_TEST_PRIVATE_KEY));
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(),
s2n_config_ptr_free);
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, chain_and_key));
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(config, "default_tls13"));
EXPECT_SUCCESS(s2n_config_disable_x509_verification(config));
DEFER_CLEANUP(struct s2n_config *multi_config = s2n_config_new(),
s2n_config_ptr_free);
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(multi_config, chain_and_key));
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(multi_config, "default_tls13"));
EXPECT_SUCCESS(s2n_config_disable_x509_verification(multi_config));
EXPECT_SUCCESS(s2n_config_set_recv_multi_record(multi_config, true));
/* Test: Read a single record */
uint32_t test_record_size_val = 0;
{
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
struct s2n_recv_wrapper counter = { 0 };
EXPECT_OK(s2n_connection_set_counting_read(server, &counter));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
test_record_size_val = s2n_stuffer_data_available(&io_pair.server_in);
EXPECT_TRUE(test_record_size_val > sizeof(test_data));
uint8_t buffer[sizeof(test_data)] = { 0 };
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
EXPECT_EQUAL(counter.count, 1);
}
const uint32_t test_record_size = test_record_size_val;
/* Test: Read the handshake */
{
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
}
/* Test: Read a record larger than the input buffer */
{
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
client->max_outgoing_fragment_length = UINT16_MAX;
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
struct s2n_recv_wrapper counter = { 0 };
EXPECT_OK(s2n_connection_set_counting_read(server, &counter));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
DEFER_CLEANUP(struct s2n_blob max_fragment_buffer = { 0 }, s2n_free);
EXPECT_SUCCESS(s2n_alloc(&max_fragment_buffer, S2N_LARGE_FRAGMENT_LENGTH));
/* Send a record that won't fit in the default input buffer */
EXPECT_EQUAL(
s2n_send(client, max_fragment_buffer.data, max_fragment_buffer.size, &blocked),
max_fragment_buffer.size);
size_t record_size = s2n_stuffer_data_available(&io_pair.server_in);
size_t fragment_size = record_size - S2N_TLS_RECORD_HEADER_LENGTH;
EXPECT_TRUE(fragment_size > buffer_in_size);
/* Test that the record can be received and the input buffer resized */
EXPECT_EQUAL(
s2n_recv(server, max_fragment_buffer.data, max_fragment_buffer.size, &blocked),
max_fragment_buffer.size);
EXPECT_TRUE(s2n_stuffer_space_remaining(&server->buffer_in) > fragment_size);
/* The header fits on the first read, but the rest of the data doesn't.
* We need a (large) shift + read to get the rest of the data.
*/
EXPECT_EQUAL(counter.count, 2);
/* Check that another record can be received afterwards */
uint8_t buffer[sizeof(test_data)] = { 0 };
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
EXPECT_EQUAL(counter.count, 3);
}
/* Test: Read multiple small records */
for (size_t greedy = 0; greedy <= 1; greedy++) {
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
if (greedy) {
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
}
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
struct s2n_recv_wrapper counter = { 0 };
EXPECT_OK(s2n_connection_set_counting_read(server, &counter));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
for (size_t i = 1; i <= sizeof(test_data); i++) {
EXPECT_EQUAL(s2n_send(client, test_data, i, &blocked), i);
}
uint8_t buffer[sizeof(test_data)] = { 0 };
for (size_t i = 1; i <= sizeof(test_data); i++) {
EXPECT_EQUAL(s2n_recv(server, buffer, i, &blocked), i);
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, i);
if (greedy) {
/* All our small records combined are smaller than the maximum
* TLS record size, so they should all be buffered immediately.
* Only one read is ever necessary.
*/
EXPECT_EQUAL(counter.count, 1);
} else {
/* We call recv twice for every record */
EXPECT_EQUAL(counter.count, i * 2);
}
}
/* The input buffer size does not change with greedy vs not greedy */
EXPECT_EQUAL(server->buffer_in.blob.allocated, buffer_in_size);
/* If all data is consumed, the input buffer can be released */
EXPECT_SUCCESS(s2n_connection_release_buffers(server));
EXPECT_EQUAL(server->buffer_in.blob.allocated, 0);
}
/* Test: Read multiple small records with "multi_record" enabled */
{
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, multi_config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, multi_config));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
struct s2n_recv_wrapper counter = { 0 };
EXPECT_OK(s2n_connection_set_counting_read(server, &counter));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
for (size_t i = 0; i < sizeof(test_data); i++) {
EXPECT_EQUAL(s2n_send(client, test_data + i, 1, &blocked), 1);
}
uint8_t buffer[sizeof(test_data)] = { 0 };
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
EXPECT_EQUAL(counter.count, 1);
}
/* Test: Read the rest of a partial record */
for (size_t i = 0; i < test_record_size; i++) {
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
struct s2n_recv_wrapper counter = { 0 };
EXPECT_OK(s2n_connection_set_counting_read(server, &counter));
size_t expected_count = 0;
/* Test: manually copy some of the record into the read buffer */
{
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_stuffer_data_available(&io_pair.server_in), test_record_size);
EXPECT_SUCCESS(s2n_stuffer_copy(&io_pair.server_in, &server->buffer_in, i));
uint8_t buffer[sizeof(test_data)] = { 0 };
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
expected_count++;
EXPECT_EQUAL(counter.count, expected_count);
}
/* Test: force the first recv to return partial data */
{
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
EXPECT_EQUAL(s2n_stuffer_data_available(&io_pair.server_in), 0);
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_stuffer_data_available(&io_pair.server_in), test_record_size);
io_pair.server_in.write_cursor -= (test_record_size - i);
uint8_t buffer[sizeof(test_data)] = { 0 };
EXPECT_FAILURE_WITH_ERRNO(s2n_recv(server, buffer, sizeof(buffer), &blocked),
S2N_ERR_IO_BLOCKED);
expected_count++;
/* If the first call returns any data, then a second call is made.
* The second call blocks. */
if (i != 0) {
expected_count++;
}
EXPECT_EQUAL(counter.count, expected_count);
io_pair.server_in.write_cursor += (test_record_size - i);
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
expected_count++;
EXPECT_EQUAL(counter.count, expected_count);
}
}
/* Test: read a single record one byte at a time */
{
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
struct s2n_recv_wrapper counter = { 0 };
EXPECT_OK(s2n_connection_set_counting_read(server, &counter));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
EXPECT_EQUAL(s2n_stuffer_data_available(&io_pair.server_in), 0);
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_stuffer_data_available(&io_pair.server_in), test_record_size);
io_pair.server_in.write_cursor -= test_record_size;
size_t expected_count = 0;
uint8_t buffer[sizeof(test_data)] = { 0 };
for (size_t i = 1; i < test_record_size; i++) {
/* Reads no additional data-- just blocks */
EXPECT_FAILURE_WITH_ERRNO(s2n_recv(server, buffer, sizeof(buffer), &blocked),
S2N_ERR_IO_BLOCKED);
expected_count++;
EXPECT_EQUAL(counter.count, expected_count);
/* Reads the next byte, then blocks again */
io_pair.server_in.write_cursor++;
EXPECT_FAILURE_WITH_ERRNO(s2n_recv(server, buffer, sizeof(buffer), &blocked),
S2N_ERR_IO_BLOCKED);
expected_count += 2;
EXPECT_EQUAL(counter.count, expected_count);
}
/* Reads the final byte and succeeds */
io_pair.server_in.write_cursor++;
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
expected_count++;
EXPECT_EQUAL(counter.count, expected_count);
}
/* Test: Read into a buffer that already contains data from a previous read */
const struct {
/* The offset the current record should begin at */
uint16_t offset;
/* Assert that shifting occurred if necessary */
uint16_t final_offset;
/* Most offsets result in a single read */
uint8_t reads;
} test_offsets[] = {
/* Basic small offsets: single read, no shifting */
{ .offset = 0, .final_offset = test_record_size, .reads = 1 },
{ .offset = 10, .final_offset = 10 + test_record_size, .reads = 1 },
{ .offset = 1000, .final_offset = 1000 + test_record_size, .reads = 1 },
/* Exactly enough space remaining in the buffer, so no shift or second read.
* We wipe the buffer after: the extra byte we add to avoid the wipe isn't
* read because we read exactly as much data as we need.
*/
{
.offset = buffer_in_size - test_record_size,
.final_offset = 0,
.reads = 1,
},
/* If we have enough space in the buffer for the next header,
* but not enough for the next fragment, then we must still read twice.
*/
{
.offset = buffer_in_size - S2N_TLS_RECORD_HEADER_LENGTH,
.final_offset = test_record_size - S2N_TLS_RECORD_HEADER_LENGTH,
.reads = 2,
},
{
.offset = buffer_in_size - S2N_TLS_RECORD_HEADER_LENGTH - 1,
.final_offset = test_record_size - S2N_TLS_RECORD_HEADER_LENGTH,
.reads = 2,
},
/* Not enough space in the buffer for the header or the fragment.
* We have to shift but don't need a second read.
*/
{ .offset = buffer_in_size - 3, .final_offset = test_record_size, .reads = 1 },
{ .offset = buffer_in_size - 1, .final_offset = test_record_size, .reads = 1 },
{ .offset = buffer_in_size, .final_offset = test_record_size, .reads = 1 },
};
for (size_t i = 0; i < s2n_array_len(test_offsets); i++) {
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
struct s2n_recv_wrapper counter = { 0 };
EXPECT_OK(s2n_connection_set_counting_read(server, &counter));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_stuffer_data_available(&io_pair.server_in), test_record_size);
/* Write one more byte so that we won't wipe buffer_in after the read.
* This will let us better examine the state of the buffer.
*/
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&io_pair.server_in, 0));
uint16_t offset = test_offsets[i].offset;
EXPECT_SUCCESS(s2n_stuffer_wipe(&server->buffer_in));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&server->buffer_in, offset));
EXPECT_SUCCESS(s2n_stuffer_skip_read(&server->buffer_in, offset));
if (offset < buffer_in_size) {
/* Preemptively copy one byte of the next record into buffer_in.
* If we don't do this, we just wipe buffer_in before the read,
* making this test trivial.
*/
EXPECT_SUCCESS(s2n_stuffer_copy(&io_pair.server_in, &server->buffer_in, 1));
}
uint8_t buffer[sizeof(test_data)] = { 0 };
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
EXPECT_EQUAL(counter.count, test_offsets[i].reads);
uint32_t expected_final_offset = test_offsets[i].final_offset;
/* If there is an offset, consider the extra byte we added to avoid the final wipe. */
if (expected_final_offset != 0) {
expected_final_offset++;
}
EXPECT_EQUAL(server->buffer_in.write_cursor, expected_final_offset);
}
/* Test: Toggle recv_greedy while reading */
{
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
EXPECT_SUCCESS(s2n_stuffer_wipe(&io_pair.server_in));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
uint8_t buffer[sizeof(test_data)] = { 0 };
/* Send many records */
const size_t records_count = 100;
for (size_t i = 0; i < records_count; i++) {
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
}
for (size_t i = 0; i < records_count / 2; i++) {
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
EXPECT_TRUE(s2n_stuffer_data_available(&server->buffer_in));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, false));
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
}
}
/* Test: s2n_connection_release_buffers with data remaining in buffer_in */
{
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
EXPECT_SUCCESS(s2n_stuffer_wipe(&io_pair.server_in));
/* Send two records */
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
/* Only consume a partial record */
io_pair.server_in.write_cursor = test_record_size / 2;
uint8_t buffer[sizeof(test_data)] = { 0 };
EXPECT_FAILURE_WITH_ERRNO(
s2n_recv(server, buffer, sizeof(test_data), &blocked),
S2N_ERR_IO_BLOCKED);
EXPECT_TRUE(s2n_stuffer_data_available(&server->in));
EXPECT_FAILURE_WITH_ERRNO(
s2n_connection_release_buffers(server),
S2N_ERR_STUFFER_HAS_UNPROCESSED_DATA);
/* Consume the full first record */
/* cppcheck-suppress redundantAssignment */
io_pair.server_in.write_cursor = test_record_size * 2;
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
/* Release buffers */
EXPECT_TRUE(s2n_stuffer_data_available(&server->buffer_in));
EXPECT_SUCCESS(s2n_connection_release_buffers(server));
EXPECT_TRUE(s2n_stuffer_data_available(&server->buffer_in));
/* Consume the full second record */
EXPECT_EQUAL(s2n_recv(server, buffer, sizeof(buffer), &blocked), sizeof(test_data));
EXPECT_BYTEARRAY_EQUAL(buffer, test_data, sizeof(test_data));
}
/* Test: s2n_peek_buffered */
{
EXPECT_EQUAL(s2n_peek_buffered(NULL), 0);
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, multi_config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, multi_config));
struct {
uint32_t read_size;
uint32_t expect_available;
uint32_t expect_buffered;
} test_cases[] = {
{
.read_size = 1,
.expect_available = sizeof(test_data) - 1,
.expect_buffered = test_record_size,
},
{
.read_size = sizeof(test_data) - 1,
.expect_available = 1,
.expect_buffered = test_record_size,
},
{
.read_size = sizeof(test_data),
.expect_available = 0,
.expect_buffered = test_record_size,
},
{
.read_size = sizeof(test_data) + 1,
.expect_available = sizeof(test_data) - 1,
.expect_buffered = 0,
},
};
for (size_t i = 0; i < s2n_array_len(test_cases); i++) {
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
EXPECT_SUCCESS(s2n_stuffer_wipe(&io_pair.server_in));
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
uint8_t buffer[sizeof(test_data) * 2] = { 0 };
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_send(client, test_data, sizeof(test_data), &blocked), sizeof(test_data));
uint32_t read_size = test_cases[i].read_size;
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(server, true));
EXPECT_EQUAL(s2n_recv(server, buffer, read_size, &blocked), read_size);
EXPECT_EQUAL(s2n_peek_buffered(server), test_cases[i].expect_buffered);
EXPECT_EQUAL(s2n_peek(server), test_cases[i].expect_available);
EXPECT_SUCCESS(s2n_connection_wipe(client));
EXPECT_SUCCESS(s2n_connection_wipe(server));
}
}
END_TEST();
}
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