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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 <stdio.h>
#include <string.h>
#include "api/s2n.h"
#include "error/s2n_errno.h"
#include "s2n_test.h"
#include "stuffer/s2n_stuffer.h"
#include "testlib/s2n_testlib.h"
#include "tls/extensions/s2n_extension_list.h"
#include "tls/s2n_cipher_suites.h"
#include "tls/s2n_tls.h"
#include "tls/s2n_tls13.h"
#include "utils/s2n_safety.h"
s2n_cert_public_key public_key;
s2n_pkey_type actual_cert_pkey_type;
static int s2n_skip_cert_chain_size(struct s2n_stuffer *stuffer)
{
uint32_t cert_chain_size;
POSIX_GUARD(s2n_stuffer_read_uint24(stuffer, &cert_chain_size));
POSIX_ENSURE_EQ(cert_chain_size, s2n_stuffer_data_available(stuffer));
return S2N_SUCCESS;
}
static int s2n_skip_cert(struct s2n_stuffer *stuffer)
{
uint32_t cert_size;
POSIX_GUARD(s2n_stuffer_read_uint24(stuffer, &cert_size));
POSIX_GUARD(s2n_stuffer_skip_read(stuffer, cert_size));
return S2N_SUCCESS;
}
static int s2n_x509_validator_validate_cert_chain_test(struct s2n_connection *conn, struct s2n_stuffer *stuffer)
{
POSIX_GUARD(s2n_skip_cert_chain_size(stuffer));
uint32_t cert_chain_size = s2n_stuffer_data_available(stuffer);
uint8_t *cert_chain_data;
POSIX_ENSURE_REF(cert_chain_data = s2n_stuffer_raw_read(stuffer, cert_chain_size));
POSIX_GUARD_RESULT(s2n_x509_validator_validate_cert_chain(&conn->x509_validator, conn,
cert_chain_data, cert_chain_size, &actual_cert_pkey_type, &public_key));
POSIX_GUARD(s2n_pkey_free(&public_key));
return S2N_SUCCESS;
}
static int s2n_write_test_cert(struct s2n_stuffer *stuffer, struct s2n_cert_chain_and_key *chain_and_key)
{
struct s2n_blob *cert = &chain_and_key->cert_chain->head->raw;
POSIX_GUARD(s2n_stuffer_write_uint24(stuffer, cert->size));
POSIX_GUARD(s2n_stuffer_write_bytes(stuffer, cert->data, cert->size));
return S2N_SUCCESS;
}
static int s2n_setup_connection_for_ocsp_validate_test(struct s2n_connection **conn, struct s2n_cert_chain_and_key *chain_and_key)
{
struct s2n_connection *nconn;
POSIX_ENSURE_REF(nconn = s2n_connection_new(S2N_SERVER));
nconn->actual_protocol_version = S2N_TLS13;
nconn->handshake_params.our_chain_and_key = chain_and_key;
POSIX_GUARD(s2n_connection_allow_all_response_extensions(nconn));
nconn->status_type = S2N_STATUS_REQUEST_OCSP;
*conn = nconn;
return S2N_SUCCESS;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
EXPECT_SUCCESS(s2n_enable_tls13_in_test());
struct s2n_config *config;
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_pkey_zero_init(&public_key));
/* Initialize cert chain */
struct s2n_cert_chain_and_key *chain_and_key;
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&chain_and_key,
S2N_DEFAULT_TEST_CERT_CHAIN, S2N_DEFAULT_TEST_PRIVATE_KEY));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, chain_and_key));
/* Initialize cert extension data */
uint8_t data[] = "extension data";
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_ocsp_data(chain_and_key, data, s2n_array_len(data)));
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_sct_list(chain_and_key, data, s2n_array_len(data)));
/* Test: s2n_send_cert_chain sends extensions */
{
/* Test: extensions only sent for >= TLS1.3 */
{
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
conn->handshake_params.our_chain_and_key = chain_and_key;
EXPECT_SUCCESS(s2n_connection_allow_all_response_extensions(conn));
conn->status_type = S2N_STATUS_REQUEST_OCSP;
/* TLS1.2 does NOT send extensions */
{
DEFER_CLEANUP(struct s2n_stuffer stuffer, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
conn->actual_protocol_version = S2N_TLS12;
EXPECT_SUCCESS(s2n_send_cert_chain(conn, &stuffer, chain_and_key));
s2n_parsed_extensions_list extensions;
EXPECT_SUCCESS(s2n_skip_cert_chain_size(&stuffer));
EXPECT_SUCCESS(s2n_skip_cert(&stuffer));
EXPECT_FAILURE_WITH_ERRNO(s2n_extension_list_parse(&stuffer, &extensions),
S2N_ERR_BAD_MESSAGE);
};
/* TLS1.3 DOES send extensions */
{
DEFER_CLEANUP(struct s2n_stuffer stuffer, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
conn->actual_protocol_version = S2N_TLS13;
EXPECT_SUCCESS(s2n_send_cert_chain(conn, &stuffer, chain_and_key));
s2n_parsed_extensions_list extensions;
EXPECT_SUCCESS(s2n_skip_cert_chain_size(&stuffer));
EXPECT_SUCCESS(s2n_skip_cert(&stuffer));
EXPECT_SUCCESS(s2n_extension_list_parse(&stuffer, &extensions));
EXPECT_PARSED_EXTENSION_LIST_NOT_EMPTY(extensions);
};
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Test: extensions only sent on first certificate */
{
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
conn->handshake_params.our_chain_and_key = chain_and_key;
DEFER_CLEANUP(struct s2n_stuffer stuffer, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_allow_all_response_extensions(conn));
conn->status_type = S2N_STATUS_REQUEST_OCSP;
conn->actual_protocol_version = S2N_TLS13;
EXPECT_SUCCESS(s2n_send_cert_chain(conn, &stuffer, chain_and_key));
s2n_parsed_extensions_list extensions;
EXPECT_SUCCESS(s2n_skip_cert_chain_size(&stuffer));
/* First cert includes extensions */
EXPECT_SUCCESS(s2n_skip_cert(&stuffer));
EXPECT_SUCCESS(s2n_extension_list_parse(&stuffer, &extensions));
EXPECT_PARSED_EXTENSION_LIST_NOT_EMPTY(extensions);
/* Other certs do not include extensions */
do {
EXPECT_SUCCESS(s2n_skip_cert(&stuffer));
EXPECT_SUCCESS(s2n_extension_list_parse(&stuffer, &extensions));
EXPECT_PARSED_EXTENSION_LIST_EMPTY(extensions);
} while (s2n_stuffer_data_available(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
};
/* Test: s2n_x509_validator_validate_cert_chain handles the output of s2n_send_cert_chain */
{
/* Test: with no extensions */
{
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
conn->actual_protocol_version = S2N_TLS13;
conn->handshake_params.our_chain_and_key = chain_and_key;
DEFER_CLEANUP(struct s2n_stuffer stuffer, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_send_cert_chain(conn, &stuffer, chain_and_key));
EXPECT_SUCCESS(s2n_x509_validator_validate_cert_chain_test(conn, &stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Test: with extensions */
{
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
conn->actual_protocol_version = S2N_TLS13;
conn->handshake_params.our_chain_and_key = chain_and_key;
DEFER_CLEANUP(struct s2n_stuffer stuffer, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_allow_all_response_extensions(conn));
conn->status_type = S2N_STATUS_REQUEST_OCSP;
conn->ct_level_requested = S2N_CT_SUPPORT_REQUEST;
EXPECT_SUCCESS(s2n_send_cert_chain(conn, &stuffer, chain_and_key));
EXPECT_SUCCESS(s2n_x509_validator_validate_cert_chain_test(conn, &stuffer));
/* OCSP extension processed */
EXPECT_EQUAL(conn->status_response.size, s2n_array_len(data));
EXPECT_BYTEARRAY_EQUAL(conn->status_response.data, data, s2n_array_len(data));
/* SCT extension processed */
EXPECT_EQUAL(conn->ct_response.size, s2n_array_len(data));
EXPECT_BYTEARRAY_EQUAL(conn->ct_response.data, data, s2n_array_len(data));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
};
/* Test: s2n_x509_validator_validate_cert_chain receives extensions */
{
/* Test: extensions only processed for >= TLS1.3 */
{
struct s2n_connection *setup_conn;
POSIX_GUARD(s2n_setup_connection_for_ocsp_validate_test(&setup_conn, chain_and_key));
DEFER_CLEANUP(struct s2n_stuffer stuffer, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
struct s2n_stuffer_reservation size = { 0 };
EXPECT_SUCCESS(s2n_stuffer_reserve_uint24(&stuffer, &size));
EXPECT_SUCCESS(s2n_write_test_cert(&stuffer, chain_and_key));
EXPECT_SUCCESS(s2n_extension_list_send(S2N_EXTENSION_LIST_CERTIFICATE, setup_conn, &stuffer));
EXPECT_SUCCESS(s2n_stuffer_write_vector_size(&size));
/* TLS1.2 does NOT process extensions */
{
struct s2n_connection *conn;
POSIX_GUARD(s2n_setup_connection_for_ocsp_validate_test(&conn, chain_and_key));
EXPECT_SUCCESS(s2n_stuffer_reread(&stuffer));
conn->actual_protocol_version = S2N_TLS12;
EXPECT_FAILURE(s2n_x509_validator_validate_cert_chain_test(conn, &stuffer));
EXPECT_EQUAL(conn->status_response.size, 0);
EXPECT_EQUAL(conn->status_response.data, NULL);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* TLS1.3 DOES process extensions */
{
struct s2n_connection *conn;
POSIX_GUARD(s2n_setup_connection_for_ocsp_validate_test(&conn, chain_and_key));
EXPECT_SUCCESS(s2n_stuffer_reread(&stuffer));
conn->actual_protocol_version = S2N_TLS13;
EXPECT_SUCCESS(s2n_x509_validator_validate_cert_chain_test(conn, &stuffer));
EXPECT_EQUAL(conn->status_response.size, s2n_array_len(data));
EXPECT_BYTEARRAY_EQUAL(conn->status_response.data, data, s2n_array_len(data));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
EXPECT_SUCCESS(s2n_connection_free(setup_conn));
};
/* Test: extensions only processed on first certificate */
{
struct s2n_stuffer_reservation size = { 0 };
/* Extensions on second cert ignored */
{
struct s2n_connection *conn;
POSIX_GUARD(s2n_setup_connection_for_ocsp_validate_test(&conn, chain_and_key));
DEFER_CLEANUP(struct s2n_stuffer stuffer, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_stuffer_reserve_uint24(&stuffer, &size));
EXPECT_SUCCESS(s2n_write_test_cert(&stuffer, chain_and_key));
EXPECT_SUCCESS(s2n_extension_list_send(S2N_EXTENSION_LIST_EMPTY, conn, &stuffer));
EXPECT_SUCCESS(s2n_write_test_cert(&stuffer, chain_and_key));
EXPECT_SUCCESS(s2n_extension_list_send(S2N_EXTENSION_LIST_CERTIFICATE, conn, &stuffer));
EXPECT_SUCCESS(s2n_stuffer_write_vector_size(&size));
EXPECT_SUCCESS(s2n_x509_validator_validate_cert_chain_test(conn, &stuffer));
EXPECT_EQUAL(conn->status_response.size, 0);
EXPECT_EQUAL(conn->status_response.data, NULL);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Extensions on first cert processed */
{
struct s2n_connection *conn;
POSIX_GUARD(s2n_setup_connection_for_ocsp_validate_test(&conn, chain_and_key));
DEFER_CLEANUP(struct s2n_stuffer stuffer, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_stuffer_reserve_uint24(&stuffer, &size));
EXPECT_SUCCESS(s2n_write_test_cert(&stuffer, chain_and_key));
EXPECT_SUCCESS(s2n_extension_list_send(S2N_EXTENSION_LIST_CERTIFICATE, conn, &stuffer));
EXPECT_SUCCESS(s2n_write_test_cert(&stuffer, chain_and_key));
EXPECT_SUCCESS(s2n_extension_list_send(S2N_EXTENSION_LIST_EMPTY, conn, &stuffer));
EXPECT_SUCCESS(s2n_stuffer_write_vector_size(&size));
EXPECT_SUCCESS(s2n_x509_validator_validate_cert_chain_test(conn, &stuffer));
EXPECT_EQUAL(conn->status_response.size, s2n_array_len(data));
EXPECT_BYTEARRAY_EQUAL(conn->status_response.data, data, s2n_array_len(data));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
};
};
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(chain_and_key));
EXPECT_SUCCESS(s2n_config_free(config));
END_TEST();
return 0;
}
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