/*
* Copyright (C) 2015 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 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>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <gnutls/gnutls.h>
#include <gnutls/dtls.h>
#include <signal.h>
#include <unistd.h>
#ifndef _WIN32
# include <netinet/in.h>
# include <sys/types.h>
# include <sys/socket.h>
# include <sys/wait.h>
#endif
#include "utils.h"
#ifdef _WIN32
void doit(void)
{
exit(77);
}
#else
/* These are global */
pid_t child;
static void terminate(void)
{
int status;
kill(child, SIGTERM);
wait(&status);
exit(1);
}
/* Tests whether we can send and receive from different processes
* using DTLS, either as server or client. DTLS is a superset of
* TLS, so correct behavior under fork means TLS would operate too.
*/
const char *side = "";
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s|<%d>| %s", side, level, str);
}
static unsigned char server_cert_pem[] =
"-----BEGIN CERTIFICATE-----\n"
"MIICHzCCAaWgAwIBAgIBCTAKBggqhkjOPQQDAjA+MQswCQYDVQQGEwJOTDERMA8G\n"
"A1UEChMIUG9sYXJTU0wxHDAaBgNVBAMTE1BvbGFyc3NsIFRlc3QgRUMgQ0EwHhcN\n"
"MTMwOTI0MTU1MjA0WhcNMjMwOTIyMTU1MjA0WjA0MQswCQYDVQQGEwJOTDERMA8G\n"
"A1UEChMIUG9sYXJTU0wxEjAQBgNVBAMTCWxvY2FsaG9zdDBZMBMGByqGSM49AgEG\n"
"CCqGSM49AwEHA0IABDfMVtl2CR5acj7HWS3/IG7ufPkGkXTQrRS192giWWKSTuUA\n"
"2CMR/+ov0jRdXRa9iojCa3cNVc2KKg76Aci07f+jgZ0wgZowCQYDVR0TBAIwADAd\n"
"BgNVHQ4EFgQUUGGlj9QH2deCAQzlZX+MY0anE74wbgYDVR0jBGcwZYAUnW0gJEkB\n"
"PyvLeLUZvH4kydv7NnyhQqRAMD4xCzAJBgNVBAYTAk5MMREwDwYDVQQKEwhQb2xh\n"
"clNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBFQyBDQYIJAMFD4n5iQ8zoMAoG\n"
"CCqGSM49BAMCA2gAMGUCMQCaLFzXptui5WQN8LlO3ddh1hMxx6tzgLvT03MTVK2S\n"
"C12r0Lz3ri/moSEpNZWqPjkCMCE2f53GXcYLqyfyJR078c/xNSUU5+Xxl7VZ414V\n"
"fGa5kHvHARBPc8YAIVIqDvHH1Q==\n"
"-----END CERTIFICATE-----\n";
const gnutls_datum_t server_cert = { server_cert_pem,
sizeof(server_cert_pem)
};
static unsigned char server_key_pem[] =
"-----BEGIN EC PRIVATE KEY-----\n"
"MHcCAQEEIPEqEyB2AnCoPL/9U/YDHvdqXYbIogTywwyp6/UfDw6noAoGCCqGSM49\n"
"AwEHoUQDQgAEN8xW2XYJHlpyPsdZLf8gbu58+QaRdNCtFLX3aCJZYpJO5QDYIxH/\n"
"6i/SNF1dFr2KiMJrdw1VzYoqDvoByLTt/w==\n"
"-----END EC PRIVATE KEY-----\n";
const gnutls_datum_t server_key = { server_key_pem,
sizeof(server_key_pem)
};
#define MSG "hello1111"
#define MSG2 "xxxxxxxxxxxx"
static
void do_fork_stuff(gnutls_session_t session)
{
pid_t pid;
int ret;
char buf[64];
/* separate sending from receiving */
pid = fork();
if (pid == -1) {
exit(1);
} else if (pid != 0) {
if (debug)
success("client: TLS version is: %s\n",
gnutls_protocol_get_name
(gnutls_protocol_get_version(session)));
sec_sleep(1);
/* the server should reflect our messages */
ret = gnutls_record_recv(session, buf, sizeof(buf));
if (ret != sizeof(MSG)-1 || memcmp(buf, MSG, sizeof(MSG)-1) != 0) {
fail("client: recv failed: %s\n", gnutls_strerror(ret));
exit(1);
}
if (debug) {
fprintf(stderr, "client received: %.*s\n", ret, buf);
}
ret = gnutls_record_recv(session, buf, sizeof(buf));
if (ret != sizeof(MSG2)-1 || memcmp(buf, MSG2, sizeof(MSG2)-1) != 0) {
fail("client: recv2 failed: %s\n", gnutls_strerror(ret));
exit(1);
}
if (debug) {
fprintf(stderr, "client received: %.*s\n", ret, buf);
}
ret = gnutls_record_recv(session, buf, sizeof(buf));
if (ret != 0) {
fail("client: recv3 failed: %s\n", gnutls_strerror(ret));
exit(1);
}
} else if (pid == 0) { /* child */
ret = gnutls_record_send(session, MSG, sizeof(MSG)-1);
if (ret != sizeof(MSG)-1) {
fail("client: send failed: %s\n", gnutls_strerror(ret));
exit(1);
}
ret = gnutls_record_send(session, MSG2, sizeof(MSG2)-1);
if (ret != sizeof(MSG2)-1) {
fail("client: send2 failed: %s\n", gnutls_strerror(ret));
exit(1);
}
sec_sleep(2);
gnutls_bye(session, GNUTLS_SHUT_WR);
}
}
static void do_reflect_stuff(gnutls_session_t session)
{
char buf[64];
unsigned buf_size;
int ret;
do {
ret = gnutls_record_recv(session, buf, sizeof(buf));
if (ret < 0) {
fail("server: recv failed: %s\n", gnutls_strerror(ret));
terminate();
}
if (ret == 0)
break;
buf_size = ret;
if (debug) {
fprintf(stderr, "server received: %.*s\n", buf_size, buf);
}
ret = gnutls_record_send(session, buf, buf_size);
if (ret < 0) {
fail("server: send failed: %s\n", gnutls_strerror(ret));
terminate();
}
} while(1);
/* do not wait for the peer to close the connection.
*/
gnutls_bye(session, GNUTLS_SHUT_WR);
}
static void client(int fd, unsigned do_fork)
{
int ret;
gnutls_certificate_credentials_t x509_cred;
gnutls_session_t session;
/* Need to enable anonymous KX specifically. */
global_init();
if (debug) {
side = "client";
gnutls_global_set_log_function(tls_log_func);
gnutls_global_set_log_level(4711);
}
gnutls_certificate_allocate_credentials(&x509_cred);
/* Initialize TLS session
*/
gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_DATAGRAM);
gnutls_dtls_set_mtu(session, 1500);
gnutls_dtls_set_timeouts(session, 6 * 1000, 60 * 1000);
//gnutls_transport_set_push_function(session, push);
/* Use default priorities */
gnutls_priority_set_direct(session,
"NONE:+VERS-DTLS-ALL:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ECDHE-ECDSA:+CURVE-ALL",
NULL);
/* 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 < 0) {
fail("client: Handshake failed\n");
gnutls_perror(ret);
exit(1);
} else {
if (debug)
success("client: Handshake was completed\n");
}
if (do_fork)
do_fork_stuff(session);
else
do_reflect_stuff(session);
close(fd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
exit(0);
}
static void server(int fd, unsigned do_fork)
{
int ret;
gnutls_certificate_credentials_t x509_cred;
gnutls_session_t session;
/* this must be called once in the program
*/
global_init();
#if 0
if (debug) {
side = "server";
gnutls_global_set_log_function(tls_log_func);
gnutls_global_set_log_level(4711);
}
#endif
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 | GNUTLS_DATAGRAM);
gnutls_dtls_set_timeouts(session, 5 * 1000, 60 * 1000);
gnutls_dtls_set_mtu(session, 400);
/* avoid calling all the priority functions, since the defaults
* are adequate.
*/
gnutls_priority_set_direct(session,
"NONE:+VERS-DTLS1.2:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ECDHE-ECDSA:+CURVE-ALL",
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) {
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)));
if (do_fork)
do_fork_stuff(session);
else
do_reflect_stuff(session);
close(fd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
static
void run(unsigned do_fork)
{
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) {
int status;
/* parent */
close(fd[1]);
client(fd[0], do_fork);
wait(&status);
check_wait_status(status);
} else {
close(fd[0]);
server(fd[1], 1-do_fork);
exit(0);
}
}
void doit(void)
{
signal(SIGPIPE, SIG_IGN);
run(0);
run(1);
}
#endif /* _WIN32 */