/*

 * Copyright (C) 2014 Nikos Mavrogiannopoulos

 * 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>

#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/dtls.h>

#include <signal.h>

#include "cert-common.h"

#include "utils.h"

static void terminate(void);

/* This program tests the ability of the record layer,

 * to detect modified record packets, under various

 * ciphersuites.

 */

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 int modify = 0;

static ssize_t

client_push(gnutls_transport_ptr_t tr, const void *data, size_t len)

{

	unsigned int fd = (long)tr;

	if (modify == 0)

		return send(fd, data, len, 0);

	else {

		uint8_t *p = (void*)data;

		if (len < 30) {

			fail("test error in packet sending\n");

			exit(1);

		}

		p[len-30]++;

		return send(fd, data, len, 0);

	}

}

#define MAX_BUF 24*1024

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

{

	int ret;

	char buffer[MAX_BUF + 1];

	const char* err;

	gnutls_anon_client_credentials_t anoncred;

	gnutls_certificate_credentials_t x509_cred;

	gnutls_session_t session;

	/* Need to enable anonymous KX specifically. */

	global_init();

	memset(buffer, 2, sizeof(buffer));

	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);

	gnutls_transport_set_push_function(session, client_push);

	/* Use default priorities */

	ret = gnutls_priority_set_direct(session, prio, &err;;

	if (ret < 0) {

		fail("error setting priority: %s\n", err);

		exit(1);

	}

	/* 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);

	/* Perform the TLS handshake

	 */

	do {

		ret = gnutls_handshake(session);

	}

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

	if (ret < 0) {

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

		     gnutls_strerror(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)));

	modify = 1;

	do {

		ret = gnutls_record_send(session, buffer, 2048);

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

	modify = 0;

	if (ret < 0) {

		fail("client[%s]: Error sending packet: %s\n", prio, gnutls_strerror(ret));

		terminate();

	}

	gnutls_bye(session, GNUTLS_SHUT_WR);

	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(int fd, const char *prio, int ign)

{

	int ret;

	const char* err;

	char buffer[MAX_BUF + 1];

	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.

	 */

	ret = gnutls_priority_set_direct(session, prio, &err;;

	if (ret < 0) {

		fail("error setting priority: %s\n", err);

		exit(1);

	}

	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) {

		close(fd);

		gnutls_deinit(session);

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

		     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)));

	/* Here we do both a receive and a send test because if valgrind

	 * detects an error on the peer, the main process will never know.

	 */

	/* make sure we are not blocked forever */

	gnutls_record_set_timeout(session, 10000);

	/* Test receiving */

	do {

		ret = gnutls_record_recv(session, buffer, MAX_BUF);

	} while (ret == GNUTLS_E_AGAIN

			 || ret == GNUTLS_E_INTERRUPTED);

	if (ret != GNUTLS_E_DECRYPTION_FAILED) {

		fail("server: received modified packet with error code %d\n", ret);

		exit(1);

	}

	close(fd);

	gnutls_deinit(session);

	gnutls_anon_free_server_credentials(anoncred);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

	if (debug)

		success("server: finished\n");

}

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

{

	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");

		fail("fork");

		exit(1);

	}

	if (child) {

		/* parent */

		success("testing %s\n", name);

		close(fd[1]);

		server(fd[0], prio, ign);

	} else {

		close(fd[0]);

		client(fd[1], prio, ign);

		exit(0);

	}

}

#define AES_CBC "NONE:+VERS-TLS1.0:-CIPHER-ALL:+AES-128-CBC:+SHA1:+SIGN-ALL:+COMP-NULL:+ANON-ECDH:+CURVE-ALL"

#define AES_CBC_SHA256 "NONE:+VERS-TLS1.2:-CIPHER-ALL:+RSA:+AES-128-CBC:+AES-256-CBC:+SHA256:+SIGN-ALL:+COMP-NULL:+ANON-ECDH:+CURVE-ALL"

#define AES_GCM "NONE:+VERS-TLS1.2:-CIPHER-ALL:+RSA:+AES-128-GCM:+MAC-ALL:+SIGN-ALL:+COMP-NULL:+ANON-ECDH:+CURVE-ALL"

#define AES_CCM "NONE:+VERS-TLS1.2:-CIPHER-ALL:+RSA:+AES-128-CCM:+MAC-ALL:+SIGN-ALL:+COMP-NULL:+ANON-ECDH:+CURVE-ALL"

#define AES_CCM_8 "NONE:+VERS-TLS1.2:-CIPHER-ALL:+RSA:+AES-128-CCM-8:+MAC-ALL:+SIGN-ALL:+COMP-NULL:+ANON-ECDH:+CURVE-ALL"

#define ARCFOUR_SHA1 "NONE:+VERS-TLS1.0:-CIPHER-ALL:+ARCFOUR-128:+SHA1:+SIGN-ALL:+COMP-NULL:+ANON-ECDH:+CURVE-ALL"

#define ARCFOUR_MD5 "NONE:+VERS-TLS1.0:-CIPHER-ALL:+ARCFOUR-128:+MD5:+SIGN-ALL:+COMP-NULL:+ANON-ECDH:+CURVE-ALL:+RSA"

#define NULL_SHA1 "NONE:+VERS-TLS1.0:-CIPHER-ALL:+NULL:+SHA1:+SIGN-ALL:+COMP-NULL:+ANON-ECDH:+RSA:+CURVE-ALL"

#define NO_ETM ":%NO_ETM"

#define TLS13_AES_GCM "NONE:+VERS-TLS1.3:-CIPHER-ALL:+RSA:+AES-128-GCM:+MAC-ALL:+SIGN-ALL:+COMP-NULL:+GROUP-ALL"

#define TLS13_AES_CCM "NONE:+VERS-TLS1.3:-CIPHER-ALL:+RSA:+AES-128-CCM:+MAC-ALL:+SIGN-ALL:+COMP-NULL:+GROUP-ALL"

#define TLS13_CHACHA_POLY1305 "NONE:+VERS-TLS1.3:-CIPHER-ALL:+RSA:+CHACHA20-POLY1305:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+GROUP-ALL"

static void ch_handler(int sig)

{

	int status;

	wait(&status);

	check_wait_status(status);

	return;

}

void doit(void)

{

	signal(SIGPIPE, SIG_IGN);

	signal(SIGCHLD, ch_handler);

	start("aes-cbc", AES_CBC, 1);

	start("aes-cbc-sha256", AES_CBC_SHA256, 1);

	start("aes-gcm", AES_GCM, 0);

	start("aes-ccm", AES_CCM, 0);

	start("aes-ccm-8", AES_CCM_8, 0);

	if (!gnutls_fips140_mode_enabled()) {

		start("null-sha1", NULL_SHA1, 0);

		start("arcfour-sha1", ARCFOUR_SHA1, 0);

		start("arcfour-md5", ARCFOUR_MD5, 0);

	}

	start("aes-cbc-no-etm", AES_CBC NO_ETM, 1);

	start("aes-cbc-sha256-no-etm", AES_CBC_SHA256 NO_ETM, 1);

	start("aes-gcm-no-etm", AES_GCM NO_ETM, 0);

	if (!gnutls_fips140_mode_enabled()) {

		start("null-sha1-no-etm", NULL_SHA1 NO_ETM, 0);

		start("arcfour-sha1-no-etm", ARCFOUR_SHA1 NO_ETM, 0);

		start("arcfour-md5-no-etm", ARCFOUR_MD5 NO_ETM, 0);

		start("tls13-chacha20-poly1305", TLS13_CHACHA_POLY1305, 0);

	}

	start("tls13-aes-gcm", TLS13_AES_GCM, 0);

	start("tls13-aes-ccm", TLS13_AES_CCM, 0);

}

#endif				/* _WIN32 */