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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 <errno.h>
#include <fcntl.h>
#include "api/s2n.h"
#include "crypto/s2n_fips.h"
#include "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "utils/s2n_safety.h"
#define NUM_TIED_CERTS 100
struct s2n_connection *create_conn(s2n_mode mode, struct s2n_config *config)
{
struct s2n_connection *conn = s2n_connection_new(mode);
PTR_GUARD_POSIX(s2n_connection_set_config(conn, config));
return conn;
}
static int num_times_cb_executed = 0;
static struct s2n_cert_chain_and_key *test_cert_tiebreak_cb(struct s2n_cert_chain_and_key *cert1,
struct s2n_cert_chain_and_key *cert2,
uint8_t *name,
uint32_t name_len)
{
const int priority1 = *((int *) s2n_cert_chain_and_key_get_ctx(cert1));
const int priority2 = *((int *) s2n_cert_chain_and_key_get_ctx(cert2));
num_times_cb_executed++;
return (priority1 > priority2 ? cert1 : cert2);
}
int main(int argc, char **argv)
{
struct s2n_config *server_config;
struct s2n_config *client_config;
struct s2n_connection *server_conn;
struct s2n_connection *client_conn;
char *alligator_cert;
char *alligator_key;
char *cert_chain;
char *private_key;
BEGIN_TEST();
EXPECT_SUCCESS(s2n_disable_tls13_in_test());
struct s2n_test_io_pair io_pair;
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_NOT_NULL(alligator_cert = malloc(S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(alligator_key = malloc(S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(s2n_read_test_pem(S2N_ALLIGATOR_SAN_CERT, alligator_cert, S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(s2n_read_test_pem(S2N_ALLIGATOR_SAN_KEY, alligator_key, S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(cert_chain = malloc(S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(private_key = malloc(S2N_MAX_TEST_PEM_SIZE));
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_SUCCESS(setenv("S2N_DONT_MLOCK", "1", 0));
EXPECT_NOT_NULL(client_config = s2n_config_new());
EXPECT_SUCCESS(s2n_config_disable_x509_verification(client_config));
/* Create config with s2n_config_add_cert_chain_and_key_to_store API with multiple certs */
{
struct s2n_cert_chain_and_key *default_cert;
/* Associated data to attach to each certificate to use in the tiebreak callback. */
int tiebreak_priorites[NUM_TIED_CERTS] = { 0 };
/* Collection of certs with the same domain name that need to have ties resolved. */
struct s2n_cert_chain_and_key *tied_certs[NUM_TIED_CERTS] = { NULL };
EXPECT_NOT_NULL(server_config = s2n_config_new());
EXPECT_SUCCESS(s2n_config_set_cert_tiebreak_callback(server_config, test_cert_tiebreak_cb));
/* Need to add at least one cert with a different domain name to make cert lookup utilize hashmap */
EXPECT_NOT_NULL(default_cert = s2n_cert_chain_and_key_new());
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_pem(default_cert, cert_chain, private_key));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(server_config, default_cert));
/* Add NUM_TIED_CERTS that are actually the same certificate(www.alligator.com) to trigger the tiebreak callback. */
for (unsigned int i = 0; i < NUM_TIED_CERTS; i++) {
EXPECT_NOT_NULL(tied_certs[i] = s2n_cert_chain_and_key_new());
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_pem(tied_certs[i], alligator_cert, alligator_key));
tiebreak_priorites[i] = i;
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_ctx(tied_certs[i], (void *) &tiebreak_priorites[i]));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(server_config, tied_certs[i]));
}
EXPECT_NOT_NULL(server_conn = create_conn(S2N_SERVER, server_config));
EXPECT_NOT_NULL(client_conn = create_conn(S2N_CLIENT, client_config));
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
EXPECT_SUCCESS(s2n_set_server_name(client_conn, "www.alligator.com"));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_TRUE(IS_FULL_HANDSHAKE(server_conn));
EXPECT_EQUAL(num_times_cb_executed, NUM_TIED_CERTS - 1);
struct s2n_cert_chain_and_key *selected_cert = s2n_connection_get_selected_cert(server_conn);
/* The last alligator certificate should have the highest priority */
EXPECT_EQUAL(selected_cert, tied_certs[(NUM_TIED_CERTS - 1)]);
EXPECT_EQUAL(s2n_cert_chain_and_key_get_ctx(selected_cert), (void *) &tiebreak_priorites[(NUM_TIED_CERTS - 1)]);
EXPECT_EQUAL(*((int *) s2n_cert_chain_and_key_get_ctx(selected_cert)), NUM_TIED_CERTS - 1);
EXPECT_SUCCESS(s2n_shutdown_test_server_and_client(server_conn, client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
for (size_t i = 0; i < NUM_TIED_CERTS; i++) {
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(tied_certs[i]));
}
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(default_cert));
EXPECT_SUCCESS(s2n_config_free(server_config));
};
/* Create config with deprecated s2n_config_add_cert_chain_and_key API */
{
EXPECT_NOT_NULL(server_config = s2n_config_new());
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key(server_config, cert_chain, private_key));
EXPECT_NOT_NULL(server_conn = create_conn(S2N_SERVER, server_config));
EXPECT_NOT_NULL(client_conn = create_conn(S2N_CLIENT, client_config));
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));
EXPECT_TRUE(IS_FULL_HANDSHAKE(server_conn));
EXPECT_SUCCESS(s2n_shutdown_test_server_and_client(server_conn, client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_config_free(server_config));
};
/* Do not allow configs to call both
* s2n_config_add_cert_chain_and_key and s2n_config_add_cert_chain_and_key_to_store */
{
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain = NULL,
s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&chain,
S2N_DEFAULT_TEST_CERT_CHAIN, S2N_DEFAULT_TEST_PRIVATE_KEY));
/* Config first uses s2n_config_add_cert_chain_and_key: library owns chain */
{
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_NOT_NULL(config);
EXPECT_EQUAL(config->cert_ownership, S2N_NOT_OWNED);
/* Add first chain */
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key(config, cert_chain, private_key));
EXPECT_EQUAL(config->cert_ownership, S2N_LIB_OWNED);
/* Try to add second chain of same type */
EXPECT_FAILURE_WITH_ERRNO(s2n_config_add_cert_chain_and_key(config, cert_chain, private_key),
S2N_ERR_MULTIPLE_DEFAULT_CERTIFICATES_PER_AUTH_TYPE);
EXPECT_EQUAL(config->cert_ownership, S2N_LIB_OWNED);
/* Try to add chain using other method */
EXPECT_FAILURE_WITH_ERRNO(s2n_config_add_cert_chain_and_key_to_store(config, chain),
S2N_ERR_CERT_OWNERSHIP);
EXPECT_EQUAL(config->cert_ownership, S2N_LIB_OWNED);
};
/* Config first uses s2n_config_add_cert_chain_and_key_to_store: application owns chain */
{
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_NOT_NULL(config);
EXPECT_EQUAL(config->cert_ownership, S2N_NOT_OWNED);
/* Add first chain */
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, chain));
EXPECT_EQUAL(config->cert_ownership, S2N_APP_OWNED);
/* Add second chain */
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, chain));
EXPECT_EQUAL(config->cert_ownership, S2N_APP_OWNED);
/* Try to add chain using other method */
EXPECT_FAILURE_WITH_ERRNO(s2n_config_add_cert_chain_and_key(config, cert_chain, private_key),
S2N_ERR_CERT_OWNERSHIP);
EXPECT_EQUAL(config->cert_ownership, S2N_APP_OWNED);
};
};
EXPECT_SUCCESS(s2n_io_pair_close(&io_pair));
EXPECT_SUCCESS(s2n_config_free(client_config));
free(cert_chain);
free(private_key);
free(alligator_cert);
free(alligator_key);
END_TEST();
return 0;
}
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