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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 <stdint.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include "api/s2n.h"
#include "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "tls/s2n_connection.h"
#include "tls/s2n_post_handshake.h"
#include "tls/s2n_record.h"
#include "tls/s2n_tls.h"
#include "tls/s2n_tls13.h"
#include "tls/s2n_tls13_handshake.h"
int s2n_key_update_write(struct s2n_blob *out);
static int s2n_test_init_encryption(struct s2n_connection *conn)
{
struct s2n_cipher_suite *cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
conn->server->cipher_suite = cipher_suite;
conn->client->cipher_suite = cipher_suite;
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
/* Just some data that's the right length */
S2N_BLOB_FROM_HEX(key, "0123456789abcdef0123456789abcdef");
S2N_BLOB_FROM_HEX(iv, "0123456789abcdef01234567");
S2N_BLOB_FROM_HEX(application_secret,
"4bc28934ddd802b00f479e14a72d7725dab45d32b3b145f29"
"e4c5b56677560eb5236b168c71c5c75aa52f3e20ee89bfb");
struct s2n_session_key *server_session_key = &conn->server->server_key;
struct s2n_session_key *client_session_key = &conn->server->server_key;
uint8_t *server_implicit_iv = conn->server->server_implicit_iv;
uint8_t *client_implicit_iv = conn->client->client_implicit_iv;
/* Initialize record algorithm */
POSIX_GUARD(cipher_suite->record_alg->cipher->init(server_session_key));
POSIX_GUARD(cipher_suite->record_alg->cipher->init(client_session_key));
POSIX_GUARD(cipher_suite->record_alg->cipher->set_encryption_key(server_session_key, &key));
POSIX_GUARD(cipher_suite->record_alg->cipher->set_encryption_key(client_session_key, &key));
POSIX_GUARD(cipher_suite->record_alg->cipher->set_decryption_key(server_session_key, &key));
POSIX_GUARD(cipher_suite->record_alg->cipher->set_decryption_key(client_session_key, &key));
/* Initialized secrets */
POSIX_CHECKED_MEMCPY(conn->secrets.version.tls13.server_app_secret, application_secret.data, application_secret.size);
POSIX_CHECKED_MEMCPY(conn->secrets.version.tls13.client_app_secret, application_secret.data, application_secret.size);
/* Copy iv bytes from input data */
POSIX_CHECKED_MEMCPY(server_implicit_iv, iv.data, iv.size);
POSIX_CHECKED_MEMCPY(client_implicit_iv, iv.data, iv.size);
return S2N_SUCCESS;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
EXPECT_SUCCESS(s2n_enable_tls13_in_test());
/* The maximum record number converted to base 256 */
uint8_t max_record_limit[S2N_TLS_SEQUENCE_NUM_LEN] = { 0, 0, 0, 0, 1, 106, 9, 229 };
/* s2n_send sends key update if necessary */
{
struct s2n_connection *server_conn;
struct s2n_connection *client_conn;
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
server_conn->actual_protocol_version = S2N_TLS13;
client_conn->actual_protocol_version = S2N_TLS13;
uint8_t zero_sequence_number[S2N_TLS_SEQUENCE_NUM_LEN] = { 0 };
EXPECT_SUCCESS(s2n_test_init_encryption(server_conn));
EXPECT_SUCCESS(s2n_test_init_encryption(client_conn));
DEFER_CLEANUP(struct s2n_stuffer input, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer output, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&output, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&input, &output, server_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&output, &input, client_conn));
/* Mimic key update send conditions */
for (size_t i = 0; i < S2N_TLS_SEQUENCE_NUM_LEN; i++) {
server_conn->secure->server_sequence_number[i] = max_record_limit[i];
}
/* Next message to send will trigger key update message*/
s2n_blocked_status blocked;
char message[] = "sent message";
EXPECT_SUCCESS(s2n_send(server_conn, message, sizeof(message), &blocked));
/* Verify key update happened */
EXPECT_BYTEARRAY_NOT_EQUAL(server_conn->secrets.version.tls13.server_app_secret, client_conn->secrets.version.tls13.server_app_secret, S2N_TLS13_SECRET_MAX_LEN);
EXPECT_BYTEARRAY_EQUAL(server_conn->secure->server_sequence_number, zero_sequence_number, S2N_TLS_SEQUENCE_NUM_LEN);
/* Receive keyupdate message */
uint8_t data[100];
EXPECT_SUCCESS(s2n_recv(client_conn, data, sizeof(message), &blocked));
EXPECT_BYTEARRAY_EQUAL(data, message, sizeof(message));
EXPECT_BYTEARRAY_EQUAL(client_conn->secrets.version.tls13.server_app_secret, server_conn->secrets.version.tls13.server_app_secret, S2N_TLS13_SECRET_MAX_LEN);
EXPECT_BYTEARRAY_EQUAL(client_conn->secure->server_sequence_number, zero_sequence_number, S2N_TLS_SEQUENCE_NUM_LEN);
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
};
/* TLS 1.2 Server that receives TLS 1.3 KeyUpdate from Client should close connection */
{
EXPECT_SUCCESS(s2n_disable_tls13_in_test());
char *cert_chain;
char *private_key;
EXPECT_NOT_NULL(cert_chain = malloc(S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(private_key = malloc(S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(setenv("S2N_DONT_MLOCK", "1", 0));
struct s2n_test_io_pair io_pair;
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
struct s2n_connection *client_conn;
struct s2n_connection *server_conn;
struct s2n_config *server_config;
struct s2n_cert_chain_and_key *chain_and_key;
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
struct s2n_config *client_config;
EXPECT_NOT_NULL(client_config = s2n_config_new());
EXPECT_SUCCESS(s2n_config_set_check_stapled_ocsp_response(client_config, 0));
EXPECT_SUCCESS(s2n_config_disable_x509_verification(client_config));
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, client_config));
client_conn->actual_protocol_version = S2N_TLS12;
client_conn->server_protocol_version = S2N_TLS12;
client_conn->client_protocol_version = S2N_TLS12;
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
server_conn->actual_protocol_version = S2N_TLS12;
server_conn->server_protocol_version = S2N_TLS12;
server_conn->client_protocol_version = S2N_TLS12;
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
EXPECT_NOT_NULL(server_config = s2n_config_new());
EXPECT_SUCCESS(s2n_read_test_pem(S2N_DEFAULT_TEST_CERT_CHAIN, cert_chain, S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(s2n_read_test_pem(S2N_DEFAULT_TEST_PRIVATE_KEY, private_key, S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(chain_and_key = s2n_cert_chain_and_key_new());
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_pem(chain_and_key, cert_chain, private_key));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(server_config, chain_and_key));
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, server_config));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Force Client to send a TLS 1.3 KeyUpdate Message over TLS 1.2 connection */
uint8_t key_update_data[S2N_KEY_UPDATE_MESSAGE_SIZE] = { 0 };
struct s2n_blob key_update_blob = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&key_update_blob, key_update_data, sizeof(key_update_data)));
EXPECT_SUCCESS(s2n_key_update_write(&key_update_blob));
EXPECT_OK(s2n_record_write(client_conn, TLS_HANDSHAKE, &key_update_blob));
EXPECT_SUCCESS(s2n_flush(client_conn, &blocked));
/* Attempt to recv on Server conn, see KeyUpdate Message, and confirm connection is closed. */
uint8_t server_message[128];
EXPECT_SUCCESS(s2n_connection_set_blinding(server_conn, S2N_SELF_SERVICE_BLINDING));
EXPECT_FAILURE_WITH_ERRNO(s2n_recv(server_conn, server_message, sizeof(server_message), &blocked), S2N_ERR_BAD_MESSAGE);
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_io_pair_close(&io_pair));
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(chain_and_key));
EXPECT_SUCCESS(s2n_config_free(server_config));
EXPECT_SUCCESS(s2n_config_free(client_config));
free(cert_chain);
free(private_key);
};
END_TEST();
}
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