/*

 * 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>

#if defined(_WIN32)

/* socketpair isn't supported on Win32. */

int main(int argc, char **argv)

{

	exit(77);

}

#else

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#if !defined(_WIN32)

#include <sys/wait.h>

#include <signal.h>

#endif

#include <unistd.h>

#include <gnutls/gnutls.h>

#include <assert.h>

#include "utils.h"

#include "cert-common.h"

/* This test checks whether a large handshake packet is accepted by client

 * and by server. (large is around 64kb)

 */

const char *side = "";

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

{

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

}

#define TLSEXT_TYPE1 0xFA

#define TLSEXT_TYPE2 0xFB

#define TLSEXT_TYPE3 0xFC

#define TLSEXT_TYPE4 0xFD

#define TLSEXT_TYPE5 0xFE

static int TLSEXT_TYPE_server_sent  = 0;

static int TLSEXT_TYPE_client_received = 0;

#define MAX_SIZE (12*1024)

static int ext_recv_client_params(gnutls_session_t session, const unsigned char *buf, size_t buflen)

{

	if (buflen != MAX_SIZE)

		fail("ext_recv_client_params: Invalid input buffer length\n");

	TLSEXT_TYPE_client_received++;

	return 0; //Success

}

static int ext_send_client_params(gnutls_session_t session, gnutls_buffer_t extdata)

{

	unsigned char *data = gnutls_calloc(1, MAX_SIZE);

	if (data == NULL)

		return -1;

	gnutls_buffer_append_data(extdata, data, MAX_SIZE);

	gnutls_free(data);

	return MAX_SIZE;

}

static int ext_recv_server_params(gnutls_session_t session, const unsigned char *buf, size_t buflen)

{

	return 0; //Success

}

static int ext_send_server_params(gnutls_session_t session, gnutls_buffer_t extdata)

{

	unsigned char *data = gnutls_calloc(1, MAX_SIZE);

	if (data == NULL)

		return -1;

	TLSEXT_TYPE_server_sent++;

	gnutls_buffer_append_data(extdata, data, MAX_SIZE);

	gnutls_free(data);

	return MAX_SIZE;

}

static void client(int sd, const char *prio)

{

	int ret;

	gnutls_session_t session;

	gnutls_certificate_credentials_t clientx509cred;

	global_init();

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(4711);

	side = "client";

	gnutls_certificate_allocate_credentials(&clientx509cred);

	/* Initialize TLS session

	 */

	gnutls_init(&session, GNUTLS_CLIENT);

	/* Use default priorities */

	assert(gnutls_priority_set_direct(session, prio, NULL) >= 0);

	/* put the anonymous credentials to the current session

	 */

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,

				clientx509cred);

	gnutls_transport_set_int(session, sd);

	gnutls_handshake_set_timeout(session, 20 * 1000);

	gnutls_session_ext_register(session, "ext_client1", TLSEXT_TYPE1, GNUTLS_EXT_TLS, ext_recv_client_params, ext_send_client_params, NULL, NULL, NULL, 0);

	gnutls_session_ext_register(session, "ext_client2", TLSEXT_TYPE2, GNUTLS_EXT_TLS, ext_recv_client_params, ext_send_client_params, NULL, NULL, NULL, 0);

	gnutls_session_ext_register(session, "ext_client3", TLSEXT_TYPE3, GNUTLS_EXT_TLS, ext_recv_client_params, ext_send_client_params, NULL, NULL, NULL, 0);

	gnutls_session_ext_register(session, "ext_client4", TLSEXT_TYPE4, GNUTLS_EXT_TLS, ext_recv_client_params, ext_send_client_params, NULL, NULL, NULL, 0);

	gnutls_session_ext_register(session, "ext_client5", TLSEXT_TYPE5, GNUTLS_EXT_TLS, ext_recv_client_params, ext_send_client_params, NULL, NULL, NULL, 0);

	/* Perform the TLS handshake

	 */

	do {

		ret = gnutls_handshake(session);

	} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

	if (ret < 0) {

		fail("client: Handshake failed\n");

		gnutls_perror(ret);

		goto end;

	} else {

		if (debug)

			success("client: Handshake was completed\n");

	}

	if (TLSEXT_TYPE_client_received != 5)

		fail("client: extensions were not properly sent/received\n");

	gnutls_bye(session, GNUTLS_SHUT_RDWR);

end:

	close(sd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(clientx509cred);

	gnutls_global_deinit();

}

static void server(int sd, const char *prio)

{

	gnutls_certificate_credentials_t serverx509cred;

	int ret;

	gnutls_session_t session;

	/* this must be called once in the program

	 */

	global_init();

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(4711);

	side = "server";

	gnutls_certificate_allocate_credentials(&serverx509cred);

	gnutls_certificate_set_x509_key_mem(serverx509cred,

					    &server_cert, &server_key,

					    GNUTLS_X509_FMT_PEM);

	gnutls_init(&session, GNUTLS_SERVER);

	/* avoid calling all the priority functions, since the defaults

	 * are adequate.

	 */

	assert(gnutls_priority_set_direct(session, prio, NULL) >= 0);

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,

				serverx509cred);

	gnutls_session_ext_register(session, "ext_server1", TLSEXT_TYPE1, GNUTLS_EXT_TLS, ext_recv_server_params, ext_send_server_params, NULL, NULL, NULL, 0);

	gnutls_session_ext_register(session, "ext_server2", TLSEXT_TYPE2, GNUTLS_EXT_TLS, ext_recv_server_params, ext_send_server_params, NULL, NULL, NULL, 0);

	gnutls_session_ext_register(session, "ext_server3", TLSEXT_TYPE3, GNUTLS_EXT_TLS, ext_recv_server_params, ext_send_server_params, NULL, NULL, NULL, 0);

	gnutls_session_ext_register(session, "ext_server4", TLSEXT_TYPE4, GNUTLS_EXT_TLS, ext_recv_server_params, ext_send_server_params, NULL, NULL, NULL, 0);

	gnutls_session_ext_register(session, "ext_server5", TLSEXT_TYPE5, GNUTLS_EXT_TLS, ext_recv_server_params, ext_send_server_params, NULL, NULL, NULL, 0);

	gnutls_transport_set_int(session, sd);

	gnutls_handshake_set_timeout(session, 20 * 1000);

	do {

		ret = gnutls_handshake(session);

	} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

	if (ret < 0) {

		close(sd);

		gnutls_deinit(session);

		fail("server: Handshake has failed (%s)\n\n",

		     gnutls_strerror(ret));

		return;

	}

	if (debug)

		success("server: Handshake was completed\n");

	if (TLSEXT_TYPE_server_sent != 5)

		fail("server: extensions were not properly sent\n");

	/* do not wait for the peer to close the connection.

	 */

	gnutls_bye(session, GNUTLS_SHUT_WR);

	close(sd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(serverx509cred);

	gnutls_global_deinit();

	if (debug)

		success("server: finished\n");

}

static

void start(const char *prio)

{

	pid_t child;

	int sockets[2];

	int err;

	signal(SIGPIPE, SIG_IGN);

	TLSEXT_TYPE_server_sent  = 0;

	TLSEXT_TYPE_client_received = 0;

	err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);

	if (err == -1) {

		perror("socketpair");

		fail("socketpair failed\n");

		return;

	}

	child = fork();

	if (child < 0) {

		perror("fork");

		fail("fork");

		return;

	}

	if (child) {

		int status;

		/* parent */

		close(sockets[0]);

		client(sockets[1], prio);

		wait(&status);

		check_wait_status(status);

	} else {

		close(sockets[1]);

		server(sockets[0], prio);

		exit(0);

	}

}

void doit(void)

{

	start("NORMAL:-VERS-ALL:+VERS-TLS1.1");

	start("NORMAL:-VERS-ALL:+VERS-TLS1.2");

	start("NORMAL:-VERS-ALL:+VERS-TLS1.3");

	start("NORMAL");

}

#endif				/* _WIN32 */