/*
* Copyright (C) 2014 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>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <gnutls/gnutls.h>
#include <gnutls/dtls.h>
#include <signal.h>
#include <unistd.h>
#include "utils.h"
#ifdef _WIN32
void doit(void)
{
exit(77);
}
#else
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
/* Tests whether packing multiple DTLS records in a single UDP packet
* will be handled correctly, as well as an asymmetry in MTU sizes
* between server and client.
*/
const char *side = "";
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s|<%d>| %s", side, level, str);
}
static ssize_t push(gnutls_transport_ptr_t tr, const void *data, size_t len)
{
static uint8_t buffer[6 * 1024];
static unsigned buffer_size = 0;
const uint8_t *d = data;
int fd = (long int)tr;
int ret;
if (buffer_size + len > sizeof(buffer)) {
abort();
}
memcpy(&buffer[buffer_size], data, len);
buffer_size += len;
if (d[0] == 22) { /* handshake */
if (d[13] == GNUTLS_HANDSHAKE_CERTIFICATE_PKT ||
d[13] == GNUTLS_HANDSHAKE_CERTIFICATE_STATUS ||
d[13] == GNUTLS_HANDSHAKE_SERVER_KEY_EXCHANGE ||
d[13] == GNUTLS_HANDSHAKE_SERVER_HELLO ||
d[13] == GNUTLS_HANDSHAKE_CERTIFICATE_REQUEST ||
d[13] == GNUTLS_HANDSHAKE_NEW_SESSION_TICKET ||
d[13] == GNUTLS_HANDSHAKE_CERTIFICATE_VERIFY ||
d[13] == GNUTLS_HANDSHAKE_CLIENT_KEY_EXCHANGE) {
if (debug)
fprintf(stderr, "caching: %s (buffer: %d)\n",
gnutls_handshake_description_get_name(d[13]),
buffer_size);
return len;
} else if (debug) {
fprintf(stderr, "sending: %s\n",
gnutls_handshake_description_get_name(d[13]));
}
}
if (debug)
fprintf(stderr, "sending %d bytes\n", (int)buffer_size);
ret = send(fd, buffer, buffer_size, 0);
if (ret >= 0) {
if (debug)
fprintf(stderr, "reset cache\n");
buffer_size = 0;
}
return len;
}
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)
};
static void client(int fd, unsigned cache)
{
int ret;
gnutls_certificate_credentials_t x509_cred;
gnutls_session_t session;
/* Need to enable anonymous KX specifically. */
fd_set rfds;
struct timeval tv;
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);
if (ret == GNUTLS_E_AGAIN && gnutls_record_get_direction(session) == 0) {
int rv;
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
tv.tv_sec = 2;
tv.tv_usec = 0;
rv = select(fd+1, &rfds, NULL, NULL, &tv);
if (rv == -1)
perror("select()");
else if (!rv)
fail("test %d: No data were received.\n", cache);
}
}
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)));
gnutls_bye(session, GNUTLS_SHUT_WR);
close(fd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(x509_cred);
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, unsigned cache)
{
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);
if (cache != 0)
gnutls_transport_set_push_function(session, push);
/* 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)));
/* do not wait for the peer to close the connection.
*/
gnutls_bye(session, GNUTLS_SHUT_WR);
close(fd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
static
void run(unsigned cache)
{
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], cache);
wait(&status);
check_wait_status(status);
} else {
close(fd[0]);
server(fd[1], cache);
exit(0);
}
}
void doit(void)
{
signal(SIGPIPE, SIG_IGN);
run(0);
run(1);
}
#endif /* _WIN32 */