/*

 * Copyright (C) 2004-2012 Free Software Foundation, Inc.

 *

 * Author: Thierry Quemerais

 *

 * 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 Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>

 */

/* Parts copied from GnuTLS example programs. */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#include <assert.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>

#endif

#include <unistd.h>

#include <gnutls/gnutls.h>

#include "utils.h"

#include "cert-common.h"

/* A very basic TLS client, with supplemental data

 */

extern void _gnutls_supplemental_deinit(void);

const char *side = "";

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

{

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

}

#define TLS_SUPPLEMENTALDATATYPE_SAMPLE	0xBABE

static int TLS_SUPPLEMENTALDATA_client_sent     = 0;

static int TLS_SUPPLEMENTALDATA_client_received	= 0;

static int TLS_SUPPLEMENTALDATA_server_sent	= 0;

static int TLS_SUPPLEMENTALDATA_server_received	= 0;

static const unsigned char supp_data[] =

{	

	0xFE,

	0xED

};

static

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

{

	TLS_SUPPLEMENTALDATA_client_received = 1;

	if (buflen != sizeof(supp_data))

		fail("supp_client_recv_func: Invalid input buffer len\n");

	if (memcmp(buf, supp_data, sizeof(supp_data)) != 0)

		fail("supp_client_recv_func: Invalid input buffer data\n");

	return GNUTLS_E_SUCCESS;

}

static

int supp_client_send_func(gnutls_session_t session, gnutls_buffer_t buf)

{

	TLS_SUPPLEMENTALDATA_client_sent = 1;

	gnutls_buffer_append_data(buf, supp_data, sizeof(supp_data));

	return GNUTLS_E_SUCCESS;

}

static

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

{

	TLS_SUPPLEMENTALDATA_server_received = 1;

	if (buflen != sizeof(supp_data))

		fail("supp_server_recv_func: Invalid input buffer len\n");

	if (memcmp(buf, supp_data, sizeof(supp_data)) != 0)

		fail("supp_server_recv_func: Invalid input buffer data\n");

	return GNUTLS_E_SUCCESS;

}

static

int supp_server_send_func(gnutls_session_t session, gnutls_buffer_t buf)

{

	TLS_SUPPLEMENTALDATA_server_sent = 1;

	gnutls_buffer_append_data(buf, supp_data, sizeof(supp_data));

	return GNUTLS_E_SUCCESS;

}

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

{

	int ret;

	gnutls_session_t session;

	gnutls_certificate_credentials_t clientx509cred;

	if (!server_only) {

		assert(gnutls_supplemental_register("supplemental_client", TLS_SUPPLEMENTALDATATYPE_SAMPLE, supp_client_recv_func, supp_client_send_func)>=0);

	}

	side = "client";

	gnutls_certificate_allocate_credentials(&clientx509cred);

	assert(gnutls_init(&session, GNUTLS_CLIENT)>=0);

	/* Use default priorities */

	gnutls_priority_set_direct(session, prio, NULL);

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,

				clientx509cred);

	gnutls_transport_set_int(session, sd);

	if (!server_only) {

		gnutls_supplemental_recv(session, 1);

		gnutls_supplemental_send(session, 1);

	}

	/* Perform the TLS handshake

	 */

	ret = gnutls_handshake(session);

	if (ret < 0) {

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

		gnutls_perror(ret);

		goto end;

	} else {

		if (debug)

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

	}

	if (!server_only) {

		if (TLS_SUPPLEMENTALDATA_client_sent != 1 || TLS_SUPPLEMENTALDATA_client_received != 1)

			fail("client: extension not properly sent/received (%d.%d)\n",

			     TLS_SUPPLEMENTALDATA_client_sent, TLS_SUPPLEMENTALDATA_client_received);

	} else {

		/* we expect TLS1.2 handshake as TLS1.3 is not (yet) defined

		 * with supplemental data */

		assert(gnutls_protocol_get_version(session) == GNUTLS_TLS1_2);

	}

	gnutls_bye(session, GNUTLS_SHUT_RDWR);

end:

	close(sd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(clientx509cred);

}

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

{

	gnutls_certificate_credentials_t serverx509cred;

	int ret;

	gnutls_session_t session;

	static unsigned registered = 0;

	side = "server";

	if (!registered) {

		assert(gnutls_supplemental_register("supplemental_server", TLS_SUPPLEMENTALDATATYPE_SAMPLE, supp_server_recv_func, supp_server_send_func)>=0);

		registered = 0;

	}

	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);

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

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,

				serverx509cred);

	if (!server_only) {

		gnutls_supplemental_recv(session, 1);

		gnutls_supplemental_send(session, 1);

	}

	gnutls_transport_set_int(session, sd);

	ret = gnutls_handshake(session);

	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 (!server_only) {

		if (TLS_SUPPLEMENTALDATA_server_sent != 1 || TLS_SUPPLEMENTALDATA_server_received != 1)

			fail("server: extension not properly sent/received\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);

	if (debug)

		success("server: finished\n");

	_gnutls_supplemental_deinit();

}

static

void start(const char *prio, unsigned server_only)

{

	pid_t child;

	int sockets[2], err;

	TLS_SUPPLEMENTALDATA_client_sent = 0;

	TLS_SUPPLEMENTALDATA_client_received = 0;

	TLS_SUPPLEMENTALDATA_server_sent = 0;

	TLS_SUPPLEMENTALDATA_server_received = 0;

	success("running with %s\n", prio);

	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[1]);

		server(sockets[0], prio, server_only);

		wait(&status);

		check_wait_status(status);

	} else {

		close(sockets[0]);

		client(sockets[1], prio, server_only);

		exit(0);

	}

}

void doit(void)

{

	signal(SIGPIPE, SIG_IGN);

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(6);

	start("NORMAL:-VERS-ALL:+VERS-TLS1.3:+VERS-TLS1.2", 0);

	start("NORMAL:-VERS-ALL:+VERS-TLS1.2", 0);

	start("NORMAL", 0);

	start("NORMAL:-VERS-ALL:+VERS-TLS1.3:+VERS-TLS1.2", 1);

	start("NORMAL", 1);

}

#endif				/* _WIN32 */