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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"
bool s2n_custom_recv_fn_called = false;
int s2n_expect_concurrent_error_recv_fn(void *io_context, uint8_t *buf, uint32_t len)
{
struct s2n_connection *conn = (struct s2n_connection *) io_context;
s2n_custom_recv_fn_called = true;
s2n_blocked_status blocked = 0;
ssize_t result = s2n_recv(conn, buf, len, &blocked);
EXPECT_FAILURE_WITH_ERRNO(result, S2N_ERR_REENTRANCY);
return result;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
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));
/* s2n_peek */
{
/* We do full handshakes and send with a real connection here instead of
* just calling s2n_connection_set_secrets because s2n_peek depends on details
* of how data is encrypted, and we don't want to make any incorrect assumptions.
*/
/* Safety check */
EXPECT_EQUAL(s2n_peek(NULL), 0);
const uint8_t test_data[100] = "hello world";
const size_t test_data_size = sizeof(test_data);
/* s2n_peek reports available plaintext bytes */
{
s2n_blocked_status blocked = 0;
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
struct s2n_test_io_pair io_pair = { 0 };
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Write some data */
EXPECT_EQUAL(s2n_send(client_conn, test_data, sizeof(test_data), &blocked), sizeof(test_data));
/* Initially, no data reported as available */
EXPECT_EQUAL(s2n_peek(server_conn), 0);
/* Read some, but not all, of the data written */
uint8_t output[sizeof(test_data)] = { 0 };
const size_t expected_peek_size = 10;
const size_t recv_size = test_data_size - expected_peek_size;
EXPECT_EQUAL(s2n_recv(server_conn, output, recv_size, &blocked), recv_size);
/* After a partial read, some data reported as available */
EXPECT_EQUAL(s2n_peek(server_conn), expected_peek_size);
/* Read the rest of the data */
EXPECT_EQUAL(s2n_recv(server_conn, output, expected_peek_size, &blocked), expected_peek_size);
/* After the complete read, no data reported as available */
EXPECT_EQUAL(s2n_peek(server_conn), 0);
};
/* s2n_peek doesn't report bytes belonging to partially read, still encrypted records */
{
s2n_blocked_status blocked = 0;
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
/* Use stuffers for IO so that we can trigger a block on a read */
DEFER_CLEANUP(struct s2n_stuffer server_in = { 0 }, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer server_out = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&server_in, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&server_out, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&server_out, &server_in, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&server_in, &server_out, server_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Write some data */
EXPECT_EQUAL(s2n_send(client_conn, test_data, sizeof(test_data), &blocked), sizeof(test_data));
/* Drop some of the data */
EXPECT_SUCCESS(s2n_stuffer_wipe_n(&server_in, 10));
/* Try to read the data, but block */
uint8_t output[sizeof(test_data)] = { 0 };
EXPECT_FAILURE_WITH_ERRNO(s2n_recv(server_conn, output, sizeof(test_data), &blocked),
S2N_ERR_IO_BLOCKED);
/* conn->in contains data, but s2n_peek reports no data available */
EXPECT_TRUE(s2n_stuffer_data_available(&server_conn->in));
EXPECT_EQUAL(s2n_peek(server_conn), 0);
};
/* s2n_peek doesn't report bytes belonging to post-handshake messages */
{
s2n_blocked_status blocked = 0;
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
/* Use stuffers for IO so that we can trigger a block on a read */
DEFER_CLEANUP(struct s2n_stuffer server_in = { 0 }, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer server_out = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&server_in, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&server_out, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&server_out, &server_in, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&server_in, &server_out, server_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Send a KeyUpdate message */
client_conn->key_update_pending = true;
EXPECT_SUCCESS(s2n_key_update_send(client_conn, &blocked));
EXPECT_FALSE(client_conn->key_update_pending);
/* Drop some of the data */
EXPECT_SUCCESS(s2n_stuffer_wipe_n(&server_in, 10));
/* Try to read the KeyUpdate message, but block */
uint8_t output[1] = { 0 };
EXPECT_FAILURE_WITH_ERRNO(s2n_recv(server_conn, output, sizeof(output), &blocked),
S2N_ERR_IO_BLOCKED);
/* conn->in contains data, but s2n_peek reports no data available */
EXPECT_TRUE(s2n_stuffer_data_available(&server_conn->in));
EXPECT_EQUAL(s2n_peek(server_conn), 0);
};
};
/* s2n_recv cannot be called concurrently */
{
/* Setup connection */
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
/* Setup bad recv callback */
EXPECT_SUCCESS(s2n_connection_set_recv_cb(conn, s2n_expect_concurrent_error_recv_fn));
EXPECT_SUCCESS(s2n_connection_set_recv_ctx(conn, (void *) conn));
EXPECT_SUCCESS(s2n_connection_set_blinding(conn, S2N_SELF_SERVICE_BLINDING));
uint8_t test_data[100] = { 0 };
s2n_blocked_status blocked = 0;
s2n_custom_recv_fn_called = false;
EXPECT_FAILURE_WITH_ERRNO(s2n_recv(conn, test_data, sizeof(test_data), &blocked),
S2N_ERR_IO);
EXPECT_TRUE(s2n_custom_recv_fn_called);
/* Cleanup */
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* s2n_config_set_recv_multi_record */
{
#define TEST_DATA_SIZE 100
const uint8_t test_data[TEST_DATA_SIZE] = "hello world";
const size_t test_data_size = sizeof(test_data);
uint8_t output[TEST_DATA_SIZE * 2];
const size_t recv_size = sizeof(output);
{
s2n_blocked_status blocked = 0;
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
struct s2n_test_io_pair io_pair = { 0 };
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Write some data, in three records */
EXPECT_EQUAL(s2n_send(client_conn, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_send(client_conn, test_data, sizeof(test_data), &blocked), sizeof(test_data));
EXPECT_EQUAL(s2n_send(client_conn, test_data, sizeof(test_data), &blocked), sizeof(test_data));
/* Disable multi-recod recv, set legavy behvaior */
EXPECT_SUCCESS(s2n_config_set_recv_multi_record(config, false));
EXPECT_EQUAL(s2n_recv(server_conn, output, recv_size, &blocked), test_data_size);
/* Now enable multi record recv */
EXPECT_SUCCESS(s2n_config_set_recv_multi_record(config, true));
/* So we should be able to read the remaining two records in a single call */
EXPECT_EQUAL(s2n_recv(server_conn, output, recv_size, &blocked), recv_size);
}
}
END_TEST();
}
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