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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 "s2n_test.h"
#include "tls/extensions/s2n_client_server_name.h"
int main(int argc, char **argv)
{
BEGIN_TEST();
EXPECT_SUCCESS(s2n_disable_tls13_in_test());
const char *test_server_name = "github.com";
/* should_send */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
/* server_name not set -> don't send */
EXPECT_FALSE(s2n_client_server_name_extension.should_send(conn));
/* server_name empty -> don't send */
EXPECT_SUCCESS(s2n_set_server_name(conn, ""));
EXPECT_FALSE(s2n_client_server_name_extension.should_send(conn));
/* server_name set -> send */
EXPECT_SUCCESS(s2n_set_server_name(conn, test_server_name));
EXPECT_TRUE(s2n_client_server_name_extension.should_send(conn));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* send */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_SUCCESS(s2n_set_server_name(conn, test_server_name));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_client_server_name_extension.send(conn, &stuffer));
uint16_t server_name_list_size = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&stuffer, &server_name_list_size));
EXPECT_EQUAL(server_name_list_size, s2n_stuffer_data_available(&stuffer));
uint8_t name_type = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint8(&stuffer, &name_type));
EXPECT_EQUAL(name_type, 0);
uint16_t server_name_size = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&stuffer, &server_name_size));
EXPECT_EQUAL(server_name_size, s2n_stuffer_data_available(&stuffer));
EXPECT_EQUAL(server_name_size, strlen(test_server_name));
char *server_name_data = NULL;
EXPECT_NOT_NULL(server_name_data = s2n_stuffer_raw_read(&stuffer, server_name_size));
EXPECT_BYTEARRAY_EQUAL(server_name_data, test_server_name, strlen(test_server_name));
EXPECT_EQUAL(s2n_stuffer_data_available(&stuffer), 0);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* recv - basic */
{
struct s2n_connection *client_conn = NULL;
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
struct s2n_connection *server_conn = NULL;
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_set_server_name(client_conn, test_server_name));
EXPECT_SUCCESS(s2n_client_server_name_extension.send(client_conn, &stuffer));
EXPECT_STRING_EQUAL(server_conn->server_name, "");
EXPECT_SUCCESS(s2n_client_server_name_extension.recv(server_conn, &stuffer));
EXPECT_STRING_EQUAL(server_conn->server_name, test_server_name);
EXPECT_EQUAL(s2n_stuffer_data_available(&stuffer), 0);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
};
/* recv - server name already set */
{
struct s2n_connection *client_conn = NULL;
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
struct s2n_connection *server_conn = NULL;
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_CLIENT));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_set_server_name(client_conn, "DIFFERENT SERVER NAME"));
EXPECT_SUCCESS(s2n_client_server_name_extension.send(client_conn, &stuffer));
EXPECT_SUCCESS(s2n_set_server_name(server_conn, test_server_name));
EXPECT_SUCCESS(s2n_client_server_name_extension.recv(server_conn, &stuffer));
EXPECT_STRING_EQUAL(server_conn->server_name, test_server_name);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
};
/* recv - extra data ignored */
{
struct s2n_connection *client_conn = NULL;
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
struct s2n_connection *server_conn = NULL;
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_set_server_name(client_conn, test_server_name));
EXPECT_SUCCESS(s2n_client_server_name_extension.send(client_conn, &stuffer));
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, 'a'));
EXPECT_STRING_EQUAL(server_conn->server_name, "");
EXPECT_SUCCESS(s2n_client_server_name_extension.recv(server_conn, &stuffer));
EXPECT_STRING_EQUAL(server_conn->server_name, test_server_name);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
};
/* recv - malformed */
{
struct s2n_connection *client_conn = NULL;
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
struct s2n_connection *server_conn = NULL;
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_set_server_name(client_conn, test_server_name));
EXPECT_SUCCESS(s2n_client_server_name_extension.send(client_conn, &stuffer));
uint8_t extension_size = s2n_stuffer_data_available(&stuffer);
uint8_t test_bytes = extension_size - strlen(test_server_name);
/* Check that inverting any byte in the sizes / name type causes us to skip the extension */
for (int i = 0; i < test_bytes; i++) {
/* Mess something up! */
stuffer.blob.data[i] = ~stuffer.blob.data[i];
EXPECT_STRING_EQUAL(server_conn->server_name, "");
EXPECT_SUCCESS(s2n_client_server_name_extension.recv(server_conn, &stuffer));
EXPECT_STRING_EQUAL(server_conn->server_name, "");
EXPECT_SUCCESS(s2n_stuffer_rewrite(&stuffer));
EXPECT_SUCCESS(s2n_client_server_name_extension.send(client_conn, &stuffer));
}
/* Check that inverting a byte in the server name itself is fine-- there are
* no real rules about the server name! */
stuffer.blob.data[test_bytes] = ~stuffer.blob.data[test_bytes];
EXPECT_STRING_EQUAL(server_conn->server_name, "");
EXPECT_SUCCESS(s2n_client_server_name_extension.recv(server_conn, &stuffer));
EXPECT_STRING_NOT_EQUAL(server_conn->server_name, "");
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
};
END_TEST();
return 0;
}
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