/*

 * Copyright (C) 2016 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"

#include "cert-common.h"

/* This program tests whether rehandshake without ext master secret works

 * even if ext master secret was used initially.

 *

 * Note that we do not fail gracefully and we simply continue as if

 * the extension is still valid. This violates the letter of RFC7627.

 */

const char *side = "";

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

{

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

}

static void try(unsigned onclient)

{

	/* Server stuff. */

	gnutls_certificate_credentials_t serverx509cred;

	gnutls_session_t server;

	int sret = GNUTLS_E_AGAIN;

	/* Client stuff. */

	gnutls_certificate_credentials_t clientx509cred;

	gnutls_session_t client;

	int cret = GNUTLS_E_AGAIN;

	/* General init. */

	global_init();

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(7);

	/* Init server */

	gnutls_certificate_allocate_credentials(&serverx509cred);

	gnutls_certificate_set_x509_key_mem(serverx509cred,

					    &server_cert, &server_key,

					    GNUTLS_X509_FMT_PEM);

	gnutls_init(&server, GNUTLS_SERVER);

	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 */

	gnutls_certificate_allocate_credentials(&clientx509cred);

	gnutls_init(&client, GNUTLS_CLIENT);

	gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,

				clientx509cred);

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

	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_session_ext_master_secret_status(server) == 0) {

		fail("%d: ext master secret was not detected by server\n", onclient);

	}

	if (gnutls_session_ext_master_secret_status(client) == 0) {

		fail("%d: ext master secret was not detected by client\n", onclient);

	}

	if ((gnutls_session_get_flags(server) & GNUTLS_SFLAGS_EXT_MASTER_SECRET) == 0) {

		fail("%d: ext master secret was not detected by server\n", onclient);

	}

	if ((gnutls_session_get_flags(client) & GNUTLS_SFLAGS_EXT_MASTER_SECRET) == 0) {

		fail("%d: ext master secret was not detected by client\n", onclient);

	}

	if (onclient)

		gnutls_priority_set_direct(client, "NORMAL:-VERS-ALL:+VERS-TLS1.2:%NO_SESSION_HASH", NULL);

	else

		gnutls_priority_set_direct(server, "NORMAL:-VERS-ALL:+VERS-TLS1.2:%NO_SESSION_HASH", NULL);

	sret = gnutls_rehandshake(server);

	if (debug) {

		tls_log_func(0, "gnutls_rehandshake (server)...\n");

		tls_log_func(0, gnutls_strerror(sret));

		tls_log_func(0, "\n");

	}

	{

		ssize_t n;

		char b[1];

		n = gnutls_record_recv(client, b, 1);

		if (n != GNUTLS_E_REHANDSHAKE)

			abort();

	}

	if (onclient) {

		HANDSHAKE_EXPECT(client, server, GNUTLS_E_AGAIN, GNUTLS_E_DECRYPTION_FAILED);

	} else {

		HANDSHAKE_EXPECT(client, server, GNUTLS_E_AGAIN, GNUTLS_E_DECRYPTION_FAILED);

	}

	gnutls_deinit(client);

	gnutls_deinit(server);

	gnutls_certificate_free_credentials(serverx509cred);

	gnutls_certificate_free_credentials(clientx509cred);

	gnutls_global_deinit();

}

void doit(void)

{

	try(0);

	reset_buffers();

	try(1);

}