/*

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

 * Copyright (C) 2017 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 Lesser General Public License

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

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#include "cert-common.h"

#ifdef _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/dtls.h>

#include <signal.h>

#include "utils.h"

#define MAX_BUF 1024

static void terminate(void);

/* This program tests gnutls_server_name_set() and gnutls_server_name_get().

 */

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

{

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

}

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

{

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

}

/* internal function */

int _gnutls_server_name_set_raw(gnutls_session_t session,

				gnutls_server_name_type_t type,

				const void *name, size_t name_length);

static void client(const char *test_name, const char *prio, int fd, unsigned raw, const char *name, unsigned name_len, int server_err)

{

	int ret;

	gnutls_anon_client_credentials_t anoncred;

	gnutls_certificate_credentials_t x509_cred;

	gnutls_session_t session;

	/* Need to enable anonymous KX specifically. */

	global_init();

	if (debug) {

		gnutls_global_set_log_function(client_log_func);

		gnutls_global_set_log_level(7);

	}

	gnutls_anon_allocate_client_credentials(&anoncred);

	gnutls_certificate_allocate_credentials(&x509_cred);

	/* Initialize TLS session

	 */

	gnutls_init(&session, GNUTLS_CLIENT);

	/* Use default priorities */

	gnutls_priority_set_direct(session, prio, NULL);

	/* put the anonymous credentials to the current session

	 */

	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);

	gnutls_transport_set_int(session, fd);

	if (raw)

		_gnutls_server_name_set_raw(session, GNUTLS_NAME_DNS, name, name_len);

	else

		gnutls_server_name_set(session, GNUTLS_NAME_DNS, name, name_len);

	/* Perform the TLS handshake

	 */

	do {

		ret = gnutls_handshake(session);

	}

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

	if (ret < 0) {

		if (server_err < 0)

			goto cleanup;

		test_fail("Handshake failed\n");

		goto cleanup;

	} else {

		if (debug)

			test_success("Handshake was completed\n");

	}

	if (debug)

		test_success("TLS version is: %s\n",

			gnutls_protocol_get_name

			(gnutls_protocol_get_version(session)));

	gnutls_bye(session, GNUTLS_SHUT_WR);

 cleanup:

	close(fd);

	gnutls_deinit(session);

	gnutls_anon_free_client_credentials(anoncred);

	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(const char *test_name, const char *prio, int fd, const char *name, unsigned name_len, int exp_err)

{

	int ret;

	char buffer[MAX_BUF + 1];

	unsigned int type;

	size_t buffer_size;

	gnutls_session_t session;

	gnutls_anon_server_credentials_t anoncred;

	gnutls_certificate_credentials_t x509_cred;

	/* this must be called once in the program

	 */

	global_init();

	memset(buffer, 0, sizeof(buffer));

	if (debug) {

		gnutls_global_set_log_function(server_log_func);

		gnutls_global_set_log_level(4711);

	}

	gnutls_certificate_allocate_credentials(&x509_cred);

	gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,

					    &server_key,

					    GNUTLS_X509_FMT_PEM);

	gnutls_anon_allocate_server_credentials(&anoncred);

	gnutls_init(&session, GNUTLS_SERVER);

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

	 * are adequate.

	 */

	gnutls_priority_set_direct(session, prio, NULL);

	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);

	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) {

		if (exp_err == ret)

			goto cleanup;

		close(fd);

		gnutls_deinit(session);

		test_fail("Handshake has failed (%s)\n\n",

		     gnutls_strerror(ret));

		terminate();

	}

	if (debug)

		test_success("Handshake was completed\n");

	if (debug)

		test_success("TLS version is: %s\n",

			gnutls_protocol_get_name

			(gnutls_protocol_get_version(session)));

	buffer_size = sizeof(buffer);

	ret = gnutls_server_name_get(session, buffer, &buffer_size, &type, 0);

	if ((name == NULL || name[0] == 0) && (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE || ret == GNUTLS_E_IDNA_ERROR)) {

		/* expected */

		if (debug)

			test_success("empty name matches\n");

	} else if (ret < 0) {

		test_fail("server_name: %s/%d\n", gnutls_strerror(ret), ret);

	} else {

		if (name == NULL || name[0] == 0) {

			test_fail("did not receive the expected name: got: %s\n", buffer);

			exit(1);

		}

		if (buffer_size != strlen(buffer)) {

			test_fail("received name '%s/%d/%d', with embedded null\n", buffer, (int)buffer_size, (int)strlen(buffer));

			exit(1);

		}

		if (name_len != buffer_size || memcmp(name, buffer, name_len) != 0) {

			test_fail("received name '%s/%d', expected '%s/%d'\n", buffer, (int)buffer_size, name, (int)name_len);

			exit(1);

		}

		if (debug)

			test_success("name matches (%s/%s)\n", buffer, name);

	}

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

	 */

	gnutls_bye(session, GNUTLS_SHUT_WR);

 cleanup:

	close(fd);

	gnutls_deinit(session);

	gnutls_anon_free_server_credentials(anoncred);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

	if (debug)

		test_success("finished\n");

}

/* name: the name sent by client

 * server_exp: the name which should be expected by the server to see

 */

static void start(const char *test_name, const char *prio, unsigned raw, const char *name, unsigned len, const char *server_exp, unsigned server_exp_len, int server_error)

{

	int fd[2];

	int ret;

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

	if (ret < 0) {

		perror("socketpair");

		exit(1);

	}

	child = fork();

	if (child < 0) {

		perror("fork");

		test_fail("fork");

		exit(1);

	}

	if (child) {

		/* parent */

		close(fd[1]);

		server(test_name, prio, fd[0], server_exp, server_exp_len, server_error);

		kill(child, SIGTERM);

	} else {

		close(fd[0]);

		client(test_name, prio, fd[1], raw, name, len, server_error);

		exit(0);

	}

}

static void ch_handler(int sig)

{

	int status;

	wait(&status);

	check_wait_status(status);

	return;

}

#define PRIO_TLS12 "NORMAL:-VERS-ALL:+VERS-TLS1.2"

#define PRIO_TLS13 "NORMAL:-VERS-ALL:+VERS-TLS1.3"

#define PRIO_NORMAL "NORMAL"

void doit(void)

{

	signal(SIGCHLD, ch_handler);

	signal(SIGPIPE, SIG_IGN);

	start("tls1.2 NULL", PRIO_TLS12, 0, NULL, 0, NULL, 0, 0);

	start("tls1.2 empty", PRIO_TLS12, 0, "", 0, "", 0, 0);

	start("tls1.2 test.example.com", PRIO_TLS12, 0, "test.example.com", strlen("test.example.com"), "test.example.com", strlen("test.example.com"), 0);

	start("tls1.2 longtest.example.com", PRIO_TLS12, 0, "longtest.example.com.", strlen("longtest.example.com"), "longtest.example.com.", strlen("longtest.example.com"), 0);

	/* test embedded NULL */

	start("tls1.2 embedded-NULL", PRIO_TLS12, 1, "invalid\x00.example.com.", sizeof("invalid\x00.example.com")-1, NULL, 0, GNUTLS_E_RECEIVED_DISALLOWED_NAME);

	start("tls1.3 NULL", PRIO_TLS13, 0, NULL, 0, NULL, 0, 0);

	start("tls1.3 empty", PRIO_TLS13, 0, "", 0, "", 0, 0);

	start("tls1.3 test.example.com", PRIO_TLS13, 0, "test.example.com", strlen("test.example.com"), "test.example.com", strlen("test.example.com"), 0);

	start("tls1.3 longtest.example.com", PRIO_TLS13, 0, "longtest.example.com.", strlen("longtest.example.com"), "longtest.example.com.", strlen("longtest.example.com"), 0);

	/* test embedded NULL */

	start("tls1.3 embedded-NULL", PRIO_TLS13, 1, "invalid\x00.example.com.", sizeof("invalid\x00.example.com")-1, NULL, 0, GNUTLS_E_RECEIVED_DISALLOWED_NAME);

	start("NULL", PRIO_NORMAL, 0, NULL, 0, NULL, 0, 0);

	start("empty", PRIO_NORMAL, 0, "", 0, "", 0, 0);

	start("test.example.com", PRIO_NORMAL, 0, "test.example.com", strlen("test.example.com"), "test.example.com", strlen("test.example.com"), 0);

	start("longtest.example.com", PRIO_NORMAL, 0, "longtest.example.com.", strlen("longtest.example.com"), "longtest.example.com.", strlen("longtest.example.com"), 0);

	/* test embedded NULL */

	start("embedded-NULL", PRIO_NORMAL, 1, "invalid\x00.example.com.", sizeof("invalid\x00.example.com")-1, NULL, 0, GNUTLS_E_RECEIVED_DISALLOWED_NAME);

}

#endif				/* _WIN32 */