/*

 * Copyright (C) 2014 Nikos Mavrogiannopoulos

 *

 * 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)

int main()

{

	exit(77);

}

#else

#include <string.h>

#include <sys/types.h>

#include <netinet/in.h>

#include <sys/socket.h>

#include <sys/wait.h>

#include <arpa/inet.h>

#include <unistd.h>

#include <gnutls/gnutls.h>

#include <gnutls/abstract.h>

#include <gnutls/urls.h>

#include <signal.h>

#include <assert.h>

#include "cert-common.h"

#include "utils.h"

static void terminate(void);

/* This program tests the registration of custom URL strings.

 */

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

{

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

}

static int url_import_key(gnutls_privkey_t pkey, const char *url, unsigned flags)

{

	if (strcmp(url, "myurl:key") != 0) {

		fail("unexpected key url: %s\n", url);

		return GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;

	}

	return gnutls_privkey_import_x509_raw(pkey, &server_key, GNUTLS_X509_FMT_PEM, NULL, 0);

}

static int url_import_crt(gnutls_x509_crt_t crt, const char *url, unsigned flags)

{

	if (strcmp(url, "myurl:cert") != 0) {

		abort();

		fail("unexpected cert url: %s\n", url);

		return GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;

	}

	return gnutls_x509_crt_import(crt, &server_cert, GNUTLS_X509_FMT_PEM);

}

static void client(int fd)

{

	int ret;

	gnutls_certificate_credentials_t x509_cred;

	gnutls_session_t session;

	gnutls_certificate_allocate_credentials(&x509_cred);

	/* Initialize TLS session

	 */

	gnutls_init(&session, GNUTLS_CLIENT);

	/* Use default priorities */

	assert(gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.2", NULL)>=0);

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);

	gnutls_transport_set_int(session, fd);

	/* Perform the TLS handshake

	 */

	do {

		ret = gnutls_handshake(session);

	}

	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);

	if (ret < 0) {

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

		gnutls_perror(ret);

		exit(1);

	} else {

		if (debug)

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

	}

	if (debug)

		success("client: TLS version is: %s\n",

			gnutls_protocol_get_name

			(gnutls_protocol_get_version(session)));

	gnutls_bye(session, GNUTLS_SHUT_WR);

	close(fd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

}

/* These are global */

pid_t child;

static void terminate(void)

{

	kill(child, SIGTERM);

	exit(1);

}

static void server(int fd)

{

	int ret;

	gnutls_session_t session;

	gnutls_certificate_credentials_t x509_cred;

	/* this must be called once in the program

	 */

	gnutls_certificate_allocate_credentials(&x509_cred);

	ret = gnutls_certificate_set_x509_key_file(x509_cred, "nomyurl:cert", "nomyurl:key",

						   GNUTLS_X509_FMT_PEM);

	if (ret != GNUTLS_E_FILE_ERROR) {

		fail("server: gnutls_certificate_set_x509_key_file unexpected error (%s)\n\n",

		     gnutls_strerror(ret));

		terminate();

	}

	ret = gnutls_certificate_set_x509_key_file(x509_cred, "myurl:cert", "myurl:key",

						   GNUTLS_X509_FMT_PEM);

	if (ret < 0) {

		fail("server: gnutls_certificate_set_x509_key_file (%s)\n\n",

		     gnutls_strerror(ret));

		terminate();

	}

	gnutls_init(&session, GNUTLS_SERVER);

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

	 * are adequate.

	 */

	assert(gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.2", NULL)>=0);

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);

	gnutls_transport_set_int(session, fd);

	do {

		ret = gnutls_handshake(session);

	}

	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);

	if (ret < 0) {

		close(fd);

		gnutls_deinit(session);

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

		     gnutls_strerror(ret));

		terminate();

	}

	if (debug)

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

	if (debug)

		success("server: TLS version is: %s\n",

			gnutls_protocol_get_name

			(gnutls_protocol_get_version(session)));

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

	 */

	gnutls_bye(session, GNUTLS_SHUT_WR);

	close(fd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

	if (debug)

		success("server: finished\n");

}

const gnutls_custom_url_st custom_url_st = {

	.name = "myurl:",

	.name_size = sizeof("myurl:")-1,

	.import_key = url_import_key,

	.import_crt = url_import_crt

};

static void start(void)

{

	int fd[2];

	int ret;

	global_init();

	if (debug) {

		gnutls_global_set_log_function(server_log_func);

		gnutls_global_set_log_level(3);

	}

	ret = gnutls_register_custom_url(&custom_url_st);

	if (ret < 0) {

		fail("error registering: %s\n", gnutls_strerror(ret));

		exit(1);

	}

	ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);

	if (ret < 0) {

		perror("socketpair");

		exit(1);

	}

	child = fork();

	if (child < 0) {

		perror("fork");

		fail("fork");

		exit(1);

	}

	if (child) {

		/* parent */

		close(fd[0]);

		client(fd[1]);

		kill(child, SIGTERM);

	} else {

		close(fd[1]);

		server(fd[0]);

		exit(0);

	}

}

static void ch_handler(int sig)

{

	int status;

	wait(&status);

	check_wait_status(status);

	return;

}

void doit(void)

{

	signal(SIGCHLD, ch_handler);

	signal(SIGPIPE, SIG_IGN);

	start();

}

#endif				/* _WIN32 */