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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 "tls/s2n_protocol_preferences.h"
#include "api/s2n.h"
#include "s2n_test.h"
#include "tls/extensions/s2n_client_alpn.h"
#include "tls/s2n_connection.h"
#define LEN_PREFIX 1
int main(int argc, char **argv)
{
BEGIN_TEST();
/* input values */
const uint8_t protocol1[] = "protocol1";
const size_t protocol1_len = strlen((const char *) protocol1);
const uint8_t protocol2[] = "protocol abc 2";
const size_t protocol2_len = strlen((const char *) protocol2);
const uint8_t large_value[255] = { 0 };
/* Test config append */
{
struct s2n_config *config;
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_EQUAL(config->application_protocols.size, 0);
size_t prev_size = 0;
/* should grow the blob with the provided value */
EXPECT_SUCCESS(s2n_config_append_protocol_preference(config, protocol1, sizeof(protocol1)));
EXPECT_EQUAL(config->application_protocols.size, LEN_PREFIX + sizeof(protocol1));
prev_size = config->application_protocols.size;
/* should grow the blob even more */
EXPECT_SUCCESS(s2n_config_append_protocol_preference(config, protocol2, sizeof(protocol2)));
EXPECT_EQUAL(config->application_protocols.size, prev_size + LEN_PREFIX + sizeof(protocol2));
prev_size = config->application_protocols.size;
/* should reallocate the blob with large values */
EXPECT_SUCCESS(s2n_config_append_protocol_preference(config, large_value, sizeof(large_value)));
EXPECT_EQUAL(config->application_protocols.size, prev_size + LEN_PREFIX + sizeof(large_value));
prev_size = config->application_protocols.size;
/* should not allow empty protocol values */
EXPECT_FAILURE(s2n_config_append_protocol_preference(config, large_value, 0));
EXPECT_EQUAL(config->application_protocols.size, prev_size);
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Test connection append */
{
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_EQUAL(conn->application_protocols_overridden.size, 0);
size_t prev_size = 0;
/* should grow the blob with the provided value */
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, protocol1, sizeof(protocol1)));
EXPECT_EQUAL(conn->application_protocols_overridden.size, LEN_PREFIX + sizeof(protocol1));
prev_size = conn->application_protocols_overridden.size;
/* should grow the blob even more */
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, protocol2, sizeof(protocol2)));
EXPECT_EQUAL(conn->application_protocols_overridden.size, prev_size + LEN_PREFIX + sizeof(protocol2));
prev_size = conn->application_protocols_overridden.size;
/* should reallocate the blob with large values */
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, large_value, sizeof(large_value)));
EXPECT_EQUAL(conn->application_protocols_overridden.size, prev_size + LEN_PREFIX + sizeof(large_value));
prev_size = conn->application_protocols_overridden.size;
/* should not allow empty protocol values */
EXPECT_FAILURE(s2n_connection_append_protocol_preference(conn, large_value, 0));
EXPECT_EQUAL(conn->application_protocols_overridden.size, prev_size);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
const char *protocols[] = { (const char *) protocol1, (const char *) protocol2 };
const uint8_t protocols_count = s2n_array_len(protocols);
char oversized_value[257] = { 0 };
memset(&oversized_value, 1, 256);
EXPECT_EQUAL(strlen(oversized_value), 256);
const char *oversized[] = { oversized_value };
const uint8_t oversized_count = s2n_array_len(oversized);
/* Test config set */
{
struct s2n_config *config;
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_EQUAL(config->application_protocols.size, 0);
/* should copy the preference list */
EXPECT_SUCCESS(s2n_config_set_protocol_preferences(config, protocols, protocols_count));
EXPECT_EQUAL(config->application_protocols.size, LEN_PREFIX + protocol1_len + LEN_PREFIX + protocol2_len);
/* should correctly free the old list list */
EXPECT_SUCCESS(s2n_config_set_protocol_preferences(config, protocols, 1));
EXPECT_EQUAL(config->application_protocols.size, LEN_PREFIX + protocol1_len);
/* should clear the preference list */
EXPECT_SUCCESS(s2n_config_set_protocol_preferences(config, NULL, protocols_count));
EXPECT_EQUAL(config->application_protocols.size, 0);
EXPECT_SUCCESS(s2n_config_set_protocol_preferences(config, protocols, protocols_count));
EXPECT_EQUAL(config->application_protocols.size, LEN_PREFIX + protocol1_len + LEN_PREFIX + protocol2_len);
EXPECT_SUCCESS(s2n_config_set_protocol_preferences(config, protocols, 0));
EXPECT_EQUAL(config->application_protocols.size, 0);
/* should limit the length of the protocol value */
EXPECT_FAILURE(s2n_config_set_protocol_preferences(config, oversized, oversized_count));
EXPECT_EQUAL(config->application_protocols.size, 0);
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Test connection set */
{
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_EQUAL(conn->application_protocols_overridden.size, 0);
/* should copy the preference list */
EXPECT_SUCCESS(s2n_connection_set_protocol_preferences(conn, protocols, protocols_count));
EXPECT_EQUAL(conn->application_protocols_overridden.size, LEN_PREFIX + protocol1_len + LEN_PREFIX + protocol2_len);
/* should correctly free the old list */
EXPECT_SUCCESS(s2n_connection_set_protocol_preferences(conn, protocols, 1));
EXPECT_EQUAL(conn->application_protocols_overridden.size, LEN_PREFIX + protocol1_len);
/* should clear the preference list */
EXPECT_SUCCESS(s2n_connection_set_protocol_preferences(conn, NULL, protocols_count));
EXPECT_EQUAL(conn->application_protocols_overridden.size, 0);
EXPECT_SUCCESS(s2n_connection_set_protocol_preferences(conn, protocols, protocols_count));
EXPECT_EQUAL(conn->application_protocols_overridden.size, LEN_PREFIX + protocol1_len + LEN_PREFIX + protocol2_len);
EXPECT_SUCCESS(s2n_connection_set_protocol_preferences(conn, protocols, 0));
EXPECT_EQUAL(conn->application_protocols_overridden.size, 0);
/* should limit the length of the protocol value */
EXPECT_FAILURE(s2n_connection_set_protocol_preferences(conn, oversized, oversized_count));
EXPECT_EQUAL(conn->application_protocols_overridden.size, 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Test s2n_protocol_preferences_read */
{
/* Safety checks */
{
struct s2n_stuffer stuffer = { 0 };
struct s2n_blob blob = { 0 };
EXPECT_ERROR_WITH_ERRNO(s2n_protocol_preferences_read(NULL, &blob), S2N_ERR_NULL);
EXPECT_ERROR_WITH_ERRNO(s2n_protocol_preferences_read(&stuffer, NULL), S2N_ERR_NULL);
};
/* Fail to read zero-length protocol */
{
struct s2n_stuffer input = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&input, 0));
struct s2n_blob result = { 0 };
EXPECT_ERROR_WITH_ERRNO(s2n_protocol_preferences_read(&input, &result), S2N_ERR_SAFETY);
EXPECT_EQUAL(result.size, 0);
EXPECT_SUCCESS(s2n_stuffer_free(&input));
};
/* Read valid value */
{
struct s2n_stuffer input = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&input, sizeof(protocol1)));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&input, protocol1, sizeof(protocol1)));
struct s2n_blob result = { 0 };
EXPECT_OK(s2n_protocol_preferences_read(&input, &result));
EXPECT_EQUAL(result.size, sizeof(protocol1));
EXPECT_BYTEARRAY_EQUAL(result.data, protocol1, sizeof(protocol1));
EXPECT_SUCCESS(s2n_stuffer_free(&input));
};
/* Read what we write */
{
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, protocol1, sizeof(protocol1)));
EXPECT_SUCCESS(s2n_client_alpn_extension.send(conn, &conn->handshake.io));
/* Skip list size */
EXPECT_SUCCESS(s2n_stuffer_skip_read(&conn->handshake.io, sizeof(uint16_t)));
struct s2n_blob result = { 0 };
EXPECT_OK(s2n_protocol_preferences_read(&conn->handshake.io, &result));
EXPECT_EQUAL(result.size, sizeof(protocol1));
EXPECT_BYTEARRAY_EQUAL(result.data, protocol1, sizeof(protocol1));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
};
/* s2n_protocol_preferences_contain */
{
uint8_t protocol3[] = "protocol3";
struct s2n_blob protocol3_blob = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&protocol3_blob, protocol3, sizeof(protocol3)));
/* Safety checks */
{
struct s2n_blob blob = { 0 };
bool match = false;
EXPECT_ERROR_WITH_ERRNO(s2n_protocol_preferences_contain(NULL, &blob, &match), S2N_ERR_NULL);
EXPECT_ERROR_WITH_ERRNO(s2n_protocol_preferences_contain(&blob, NULL, &match), S2N_ERR_NULL);
EXPECT_ERROR_WITH_ERRNO(s2n_protocol_preferences_contain(&blob, &blob, NULL), S2N_ERR_NULL);
};
/* No supported protocols */
{
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
bool result = true;
EXPECT_OK(s2n_protocol_preferences_contain(&conn->application_protocols_overridden, &protocol3_blob, &result));
EXPECT_FALSE(result);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* No match */
{
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, protocol1, sizeof(protocol1)));
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, protocol2, sizeof(protocol2)));
bool result = true;
EXPECT_OK(s2n_protocol_preferences_contain(&conn->application_protocols_overridden, &protocol3_blob, &result));
EXPECT_FALSE(result);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Match */
{
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, protocol1, sizeof(protocol1)));
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, protocol2, sizeof(protocol2)));
EXPECT_SUCCESS(s2n_connection_append_protocol_preference(conn, protocol3, sizeof(protocol3)));
bool result = false;
EXPECT_OK(s2n_protocol_preferences_contain(&conn->application_protocols_overridden, &protocol3_blob, &result));
EXPECT_TRUE(result);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
};
END_TEST();
return 0;
}
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