/*

 * Copyright (C) 2015 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * GnuTLS is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or

 * (at your option) any later version.

 *

 * GnuTLS is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GnuTLS; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <errno.h>

#include <gnutls/gnutls.h>

#include "utils.h"

#include "eagain-common.h"

/* This test checks whether the client switching certificates is detected

 * by the server */

const char *side;

static void tls_log_func(int level, const char *str)

{

	fprintf(stderr, "%s|<%d>| %s", side, level, str);

}

#include "cert-common.h"

static void try(void)

{

	int ret;

	/* Server stuff. */

	gnutls_certificate_credentials_t serverx509cred;

	gnutls_dh_params_t dh_params;

	const gnutls_datum_t p3 =

	    { (unsigned char *) pkcs3, strlen(pkcs3) };

	gnutls_session_t server;

	int sret = GNUTLS_E_AGAIN;

	/* Client stuff. */

	gnutls_certificate_credentials_t clientx509cred;

	gnutls_certificate_credentials_t clientx509cred2;

	gnutls_session_t client;

	int cret = GNUTLS_E_AGAIN;

	/* General init. */

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(6);

	/* Init server */

	gnutls_certificate_allocate_credentials(&serverx509cred);

	gnutls_certificate_set_x509_key_mem(serverx509cred,

					    &server_cert, &server_key,

					    GNUTLS_X509_FMT_PEM);

	gnutls_dh_params_init(&dh_params);

	gnutls_dh_params_import_pkcs3(dh_params, &p3, GNUTLS_X509_FMT_PEM);

	gnutls_certificate_set_dh_params(serverx509cred, dh_params);

	gnutls_init(&server, GNUTLS_SERVER);

	gnutls_certificate_server_set_request(server, GNUTLS_CERT_REQUEST);

	gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE,

				serverx509cred);

	gnutls_priority_set_direct(server,

				   "NORMAL:-VERS-ALL:+VERS-TLS1.2",

				   NULL);

	gnutls_transport_set_push_function(server, server_push);

	gnutls_transport_set_pull_function(server, server_pull);

	gnutls_transport_set_ptr(server, server);

	/* Init client */

	ret = gnutls_certificate_allocate_credentials(&clientx509cred);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_set_x509_key_mem(clientx509cred, &cli_cert, &cli_key, GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_set_x509_trust_mem(clientx509cred, &ca_cert, GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_allocate_credentials(&clientx509cred2);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_set_x509_key_mem(clientx509cred2, &server2_cert, &server2_key, GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_set_x509_trust_mem(clientx509cred2, &ca_cert, GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

	ret = gnutls_init(&client, GNUTLS_CLIENT);

	if (ret < 0)

		exit(1);

	ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,

				clientx509cred);

	if (ret < 0)

		exit(1);

	ret = gnutls_priority_set_direct(client, "NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+RSA", NULL);

	if (ret < 0)

		exit(1);

	gnutls_transport_set_push_function(client, client_push);

	gnutls_transport_set_pull_function(client, client_pull);

	gnutls_transport_set_ptr(client, client);

	HANDSHAKE(client, server);

	if (gnutls_kx_get(client) != GNUTLS_KX_RSA) {

		fail("got unexpected key exchange algorithm: %s (expected RSA)\n", gnutls_kx_get_name(gnutls_kx_get(client)));

		exit(1);

	}

	/* switch server's certificate and rehandshake */

	gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,

				clientx509cred2);

	HANDSHAKE_EXPECT(client, server, GNUTLS_E_AGAIN, GNUTLS_E_SESSION_USER_ID_CHANGED);

	gnutls_deinit(client);

	gnutls_deinit(server);

	gnutls_certificate_free_credentials(serverx509cred);

	gnutls_certificate_free_credentials(clientx509cred);

	gnutls_certificate_free_credentials(clientx509cred2);

	gnutls_dh_params_deinit(dh_params);

}

void doit(void)

{

	global_init();

	try();

	gnutls_global_deinit();

}