/*

 * 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>

/* This tests whether a server will reject a client advertising

 * MD5 signature algorithms only */

#if defined(_WIN32) || !defined(ENABLE_SSL2)

/* 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>

#include <sys/wait.h>

#include <unistd.h>

#include <gnutls/gnutls.h>

#include <signal.h>

#include <poll.h>

#include <errno.h>

#include <assert.h>

#include "utils.h"

#include "cert-common.h"

pid_t child;

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

{

	fprintf(stderr, "%s |<%d>| %s", child ? "server" : "client", level,

		str);

}

static unsigned char tls1_hello[] = {

0x16, 0x03, 0x01, 0x01, 0x5E, 0x01, 0x00, 0x01, 0x5A, 0x03, 0x03, 0x59, 0x52, 0x41, 0x54, 0xD5,

0x52, 0x62, 0x63, 0x69, 0x1B, 0x46, 0xBE, 0x33, 0xCC, 0xC4, 0xC3, 0xB3, 0x6C, 0xCD, 0xEC, 0x96,

0xF7, 0x7A, 0xCA, 0xE9, 0xFB, 0x85, 0x95, 0x83, 0x51, 0xE4, 0x69, 0x00, 0x00, 0xD4, 0xC0, 0x30,

0xCC, 0xA8, 0xC0, 0x8B, 0xC0, 0x14, 0xC0, 0x28, 0xC0, 0x77, 0xC0, 0x2F, 0xC0, 0x8A, 0xC0, 0x13,

0xC0, 0x27, 0xC0, 0x76, 0xC0, 0x12, 0xC0, 0x2C, 0xC0, 0xAD, 0xCC, 0xA9, 0xC0, 0x87, 0xC0, 0x0A,

0xC0, 0x24, 0xC0, 0x73, 0xC0, 0x2B, 0xC0, 0xAC, 0xC0, 0x86, 0xC0, 0x09, 0xC0, 0x23, 0xC0, 0x72,

0xC0, 0x08, 0x00, 0x9D, 0xC0, 0x9D, 0xC0, 0x7B, 0x00, 0x35, 0x00, 0x3D, 0x00, 0x84, 0x00, 0xC0,

0x00, 0x9C, 0xC0, 0x9C, 0xC0, 0x7A, 0x00, 0x2F, 0x00, 0x3C, 0x00, 0x41, 0x00, 0xBA, 0x00, 0x0A,

0x00, 0x9F, 0xC0, 0x9F, 0xCC, 0xAA, 0xC0, 0x7D, 0x00, 0x39, 0x00, 0x6B, 0x00, 0x88, 0x00, 0xC4,

0x00, 0x9E, 0xC0, 0x9E, 0xC0, 0x7C, 0x00, 0x33, 0x00, 0x67, 0x00, 0x45, 0x00, 0xBE, 0x00, 0x16,

0x00, 0xA3, 0xC0, 0x81, 0x00, 0x38, 0x00, 0x6A, 0x00, 0x87, 0x00, 0xC3, 0x00, 0xA2, 0xC0, 0x80,

0x00, 0x32, 0x00, 0x40, 0x00, 0x44, 0x00, 0xBD, 0x00, 0x13, 0x00, 0xA9, 0xC0, 0xA5, 0xCC, 0xAB,

0xC0, 0x8F, 0x00, 0x8D, 0x00, 0xAF, 0xC0, 0x95, 0x00, 0xA8, 0xC0, 0xA4, 0xC0, 0x8E, 0x00, 0x8C,

0x00, 0xAE, 0xC0, 0x94, 0x00, 0x8B, 0x00, 0xAB, 0xC0, 0xA7, 0xCC, 0xAD, 0xC0, 0x91, 0x00, 0x91,

0x00, 0xB3, 0xC0, 0x97, 0x00, 0xAA, 0xC0, 0xA6, 0xC0, 0x90, 0x00, 0x90, 0x00, 0xB2, 0xC0, 0x96,

0x00, 0x8F, 0xCC, 0xAC, 0xC0, 0x36, 0xC0, 0x38, 0xC0, 0x9B, 0xC0, 0x35, 0xC0, 0x37, 0xC0, 0x9A,

0xC0, 0x34, 0x01, 0x00, 0x00, 0x5D, 0x00, 0x17, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x05,

0x00, 0x05, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0x11, 0x00, 0x00, 0x0E,

0x77, 0x77, 0x77, 0x2E, 0x67, 0x6F, 0x6F, 0x67, 0x6C, 0x65, 0x2E, 0x63, 0x6F, 0x6D, 0xFF, 0x01,

0x00, 0x01, 0x00, 0x00, 0x23, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x08, 0x00, 0x06, 0x00, 0x17, 0x00,

0x18, 0x00, 0x19, 0x00, 0x0B, 0x00, 0x02, 0x01, 0x00, 0x00, 0x0D, 0x00, 0x16, 0x00, 0x14, 0x01,

0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,

0x01, 0x01, 0x01};

static void client(int sd)

{

	char buf[1024];

	int ret;

	struct pollfd pfd;

	/* send a TLS 1.x hello advertising RSA-MD5 */

	ret = send(sd, tls1_hello, sizeof(tls1_hello), 0);

	if (ret < 0)

		fail("error sending hello\n");

	pfd.fd = sd;

	pfd.events = POLLIN;

	pfd.revents = 0;

	do {

		ret = poll(&pfd, 1, 10000);

	} while (ret == -1 && errno == EINTR);

	if (ret == -1 || ret == 0) {

		fail("timeout waiting for reply\n");

	}

	success("sent hello\n");

	ret = recv(sd, buf, sizeof(buf), 0);

	if (ret < 0)

		fail("error receiving alert\n");

	success("received reply\n");

	if (ret < 7)

		fail("error in size of received alert\n");

	if (buf[0] != 0x15 || buf[1] != 0x03)

		fail("error in received alert data\n");

	success("all ok\n");

	close(sd);

}

static void server(int sd)

{

	gnutls_certificate_credentials_t x509_cred;

	gnutls_session_t session;

	int ret;

	/* 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(6);

	gnutls_certificate_allocate_credentials(&x509_cred);

	gnutls_certificate_set_x509_trust_mem(x509_cred, &ca3_cert,

					      GNUTLS_X509_FMT_PEM);

	gnutls_certificate_set_x509_key_mem(x509_cred, &server_ca3_localhost_cert,

					    &server_ca3_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, "NORMAL:-VERS-ALL:+VERS-TLS1.2:-RSA", NULL)>=0);

	gnutls_handshake_set_timeout(session, 20 * 1000);

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);

	gnutls_transport_set_int(session, sd);

	do {

		ret = gnutls_handshake(session);

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

	if (ret != GNUTLS_E_NO_CIPHER_SUITES) {

		fail("server: Handshake succeeded unexpectedly: %s\n", gnutls_strerror(ret));

	}

	gnutls_alert_send_appropriate(session, ret);

	close(sd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

	if (debug)

		success("server: finished\n");

}

void doit(void)

{

	int sockets[2];

	int err;

	signal(SIGPIPE, SIG_IGN);

	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;

		client(sockets[1]);

		wait(&status);

		check_wait_status(status);

	} else {

		server(sockets[0]);

		_exit(0);

	}

}

#endif				/* _WIN32 */