/*

 * Copyright (C) 2016 Tim Kosse

 *

 * Author: Tim Kosse

 *

 * 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 <time.h>

#include <gnutls/gnutls.h>

#include <gnutls/dtls.h>

#include <signal.h>

#include "utils.h"

/* This program tests that handshakes fail if the server does not include the

 * requested certificate status with the server certificate having

 * TLS feature 5 (status request).

 *

 * See RFC 7633 section 4.2.3.1 paragraph 1

 *

 * Remark: Doesn't the MUST in section 4.3.3 para. 1 overrule the SHOULD of 4.2.3.1 para. 1?

 */

static time_t mytime(time_t * t)

{

	time_t then = 1464610242;

	if (t)

		*t = then;

	return then;

}

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);

}

static unsigned char server_cert_pem[] =

		"-----BEGIN CERTIFICATE-----\n"

		"MIICBzCCAXCgAwIBAgIMVpjt8TL5Io/frpvkMA0GCSqGSIb3DQEBCwUAMCIxIDAe\n"

		"BgNVBAMTF0dudVRMUyB0ZXN0IGNlcnRpZmljYXRlMB4XDTE2MDExNTEzMDI0MVoX\n"

		"DTMyMDYxOTEzMDI0MVowIjEgMB4GA1UEAxMXR251VExTIHRlc3QgY2VydGlmaWNh\n"

		"dGUwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBANe6XK+jDPAuqSdWqlOOqOt/\n"

		"gXVMa5i+Suq3HvhLw2rE2g0AuOpMEx82FpPecu/GpF6ybrbKCohVdZCW7aZXvAw7\n"

		"dg2XHr3p7H/Tqez7hWSga6BIznd+c5wxE/89yK6lYG7Ztoxamm+2vp9qvafwoDMn\n"

		"9bcdkuWWnHNS1p/WyI6xAgMBAAGjQjBAMBEGCCsGAQUFBwEYBAUwAwIBBTAMBgNV\n"

		"HRMBAf8EAjAAMB0GA1UdDgQWBBRTSzvcXshETAIgvzlIb0z+zSVSEDANBgkqhkiG\n"

		"9w0BAQsFAAOBgQB+VcJuLPL2PMog0HZ8RRbqVvLU5d209ROg3s1oXUBFW8+AV+71\n"

		"CsHg9Xx7vqKVwyKGI9ghds1B44lNPxGH2Sk1v2czjKbzwujo9+kLnDS6i0jyrDdn\n"

		"um4ivpkwmlUFSQVXvENLwe9gTlIgN4+0I9WLcMTCDtHWkcxMRwCm2BMsXw==\n"

		"-----END CERTIFICATE-----\n";

const gnutls_datum_t server_cert = { server_cert_pem,

	sizeof(server_cert_pem)

};

static unsigned char server_key_pem[] =

    "-----BEGIN RSA PRIVATE KEY-----\n"

    "MIICXAIBAAKBgQDXulyvowzwLqknVqpTjqjrf4F1TGuYvkrqtx74S8NqxNoNALjq\n"

    "TBMfNhaT3nLvxqResm62ygqIVXWQlu2mV7wMO3YNlx696ex/06ns+4VkoGugSM53\n"

    "fnOcMRP/PciupWBu2baMWppvtr6far2n8KAzJ/W3HZLllpxzUtaf1siOsQIDAQAB\n"

    "AoGAYAFyKkAYC/PYF8e7+X+tsVCHXppp8AoP8TEZuUqOZz/AArVlle/ROrypg5kl\n"

    "8YunrvUdzH9R/KZ7saNZlAPLjZyFG9beL/am6Ai7q7Ma5HMqjGU8kTEGwD7K+lbG\n"

    "iomokKMOl+kkbY/2sI5Czmbm+/PqLXOjtVc5RAsdbgvtmvkCQQDdV5QuU8jap8Hs\n"

    "Eodv/tLJ2z4+SKCV2k/7FXSKWe0vlrq0cl2qZfoTUYRnKRBcWxc9o92DxK44wgPi\n"

    "oMQS+O7fAkEA+YG+K9e60sj1K4NYbMPAbYILbZxORDecvP8lcphvwkOVUqbmxOGh\n"

    "XRmTZUuhBrJhJKKf6u7gf3KWlPl6ShKEbwJASC118cF6nurTjuLf7YKARDjNTEws\n"

    "qZEeQbdWYINAmCMj0RH2P0mvybrsXSOD5UoDAyO7aWuqkHGcCLv6FGG+qwJAOVqq\n"

    "tXdUucl6GjOKKw5geIvRRrQMhb/m5scb+5iw8A4LEEHPgGiBaF5NtJZLALgWfo5n\n"

    "hmC8+G8F0F78znQtPwJBANexu+Tg5KfOnzSILJMo3oXiXhf5PqXIDmbN0BKyCKAQ\n"

    "LfkcEcUbVfmDaHpvzwY9VEaoMOKVLitETXdNSxVpvWM=\n"

    "-----END RSA PRIVATE KEY-----\n";

const gnutls_datum_t server_key = { server_key_pem,

	sizeof(server_key_pem)

};

static int received = 0;

static int handshake_callback(gnutls_session_t session, unsigned int htype,

	unsigned post, unsigned int incoming, const gnutls_datum_t *msg)

{

	fail("received status request\n");

	received = 1;

	return 0;

}

#define MAX_BUF 1024

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

{

	int ret;

	unsigned int status;

	gnutls_certificate_credentials_t x509_cred;

	gnutls_session_t session;

	/* Need to enable anonymous KX specifically. */

	gnutls_global_set_time_function(mytime);

	global_init();

	if (debug) {

		gnutls_global_set_log_function(client_log_func);

		gnutls_global_set_log_level(7);

	}

	gnutls_certificate_allocate_credentials(&x509_cred);

	/* Initialize TLS session

	 */

	gnutls_init(&session, GNUTLS_CLIENT);

	/* Use default priorities */

	gnutls_priority_set_direct(session, prio, NULL);

	gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_CERTIFICATE_STATUS,

					   GNUTLS_HOOK_POST,

					   handshake_callback);

	/* put the anonymous credentials to the current session

	 */

	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 == GNUTLS_E_UNSUPPORTED_SIGNATURE_ALGORITHM) {

		/* success */

		goto end;

	}

	if (ret < 0) {

		fail("client: Handshake failed: %s\n", gnutls_strerror(ret));

	} 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)));

	if (received == 1) {

		fail("client: received certificate status when we shouldn't.\n");

	}

	ret = gnutls_certificate_verify_peers2(session, &status);

	if (ret != GNUTLS_E_SUCCESS) {

		fail("client: Peer certificate validation failed: %s\n", gnutls_strerror(ret));

	}

	else {

		if (status & GNUTLS_CERT_MISSING_OCSP_STATUS) {

			success("client: Validation failed with GNUTLS_CERT_MISSING_OCSP_STATUS\n");

		}

		else {

			fail("client: Validation status does not include GNUTLS_CERT_MISSING_OCSP_STATUS. Status is %d\n", status);

		}

	}

	gnutls_bye(session, GNUTLS_SHUT_WR);

      end:

	close(fd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

}

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

{

	int ret;

	char buffer[MAX_BUF + 1];

	gnutls_session_t session;

	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_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_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) {

		/* failure is expected here */

		goto end;

	}

	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);

 end:

	close(fd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

	if (debug)

		success("server: finished\n");

}

static void ch_handler(int sig)

{

	return;

}

static void start(const char *name, const char *prio)

{

	pid_t child;

	int fd[2];

	int ret, status = 0;

	signal(SIGCHLD, ch_handler);

	signal(SIGPIPE, SIG_IGN);

	received = 0;

	success("running: %s\n", name);

	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[1]);

		client(fd[0], prio);

		waitpid(child, &status, 0);

		check_wait_status(status);

	} else {

		close(fd[0]);

		server(fd[1], prio);

		exit(0);

	}

	return;

}

void doit(void)

{

	start("tls1.2", "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.2");

	start("tls1.3", "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3");

	start("default", "NORMAL");

}

#endif				/* _WIN32 */