/*
* Copyright (C) 2015 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) || !defined(HAVE_LIBSECCOMP)
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 <signal.h>
#include <gnutls/gnutls.h>
#include <gnutls/dtls.h>
#include "cert-common.h"
#include "utils.h"
static void terminate(void);
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);
}
#define MAX_BUF 1024
static void client(int fd)
{
int ret;
char buffer[MAX_BUF + 1];
gnutls_certificate_credentials_t xcred;
gnutls_session_t session;
global_init();
if (debug) {
gnutls_global_set_log_function(client_log_func);
gnutls_global_set_log_level(4711);
}
gnutls_certificate_allocate_credentials(&xcred);
ret = disable_system_calls();
if (ret < 0) {
fprintf(stderr, "could not enable seccomp\n");
exit(2);
}
/* Initialize TLS session
*/
gnutls_init(&session, GNUTLS_CLIENT);
gnutls_handshake_set_timeout(session, 20 * 1000);
/* Use default priorities */
gnutls_priority_set_direct(session,
"NORMAL:-KX-ALL:+ECDHE-RSA",
NULL);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
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)));
do {
ret = gnutls_record_recv(session, buffer, sizeof(buffer)-1);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret == 0) {
if (debug)
success
("client: Peer has closed the TLS connection\n");
goto end;
} else if (ret < 0) {
fail("client: Error: %s\n", gnutls_strerror(ret));
exit(1);
}
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
if (ret < 0) {
fail("server: error in closing session: %s\n", gnutls_strerror(ret));
}
end:
close(fd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(xcred);
gnutls_global_deinit();
}
/* These are global */
pid_t child;
static void terminate(void)
{
int status;
kill(child, SIGTERM);
wait(&status);
exit(1);
}
static void server(int fd)
{
int ret;
gnutls_certificate_credentials_t xcred;
char buffer[MAX_BUF + 1];
gnutls_session_t session;
/* this must be called once in the program
*/
global_init();
if (debug) {
gnutls_global_set_log_function(server_log_func);
gnutls_global_set_log_level(4711);
}
gnutls_certificate_allocate_credentials(&xcred);
ret = gnutls_certificate_set_x509_key_mem(xcred,
&server_cert, &server_key,
GNUTLS_X509_FMT_PEM);
if (ret < 0)
exit(1);
gnutls_init(&session, GNUTLS_SERVER);
gnutls_handshake_set_timeout(session, 20 * 1000);
/* avoid calling all the priority functions, since the defaults
* are adequate.
*/
gnutls_priority_set_direct(session,
"NORMAL:-KX-ALL:+ECDHE-RSA",
NULL);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
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)));
/* see the Getting peer's information example */
/* print_info(session); */
memset(buffer, 1, sizeof(buffer));
do {
ret = gnutls_record_send(session, buffer, sizeof(buffer)-1);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0) {
close(fd);
gnutls_deinit(session);
fail("server: data sending has failed (%s)\n\n",
gnutls_strerror(ret));
terminate();
}
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
if (ret < 0) {
fail("server: error in closing session: %s\n", gnutls_strerror(ret));
}
close(fd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(xcred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
void doit(void)
{
int fd[2];
int ret;
signal(SIGPIPE, SIG_IGN);
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) {
int status;
/* parent */
close(fd[1]);
server(fd[0]);
wait(&status);
check_wait_status(status);
} else {
close(fd[0]);
client(fd[1]);
exit(0);
}
}
#endif /* _WIN32 */