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/*
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* Copyright (C) 2012 Free Software Foundation, Inc.
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aea12f |
*
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* Author: Nikos Mavrogiannopoulos
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*
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* This file is part of GnuTLS.
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*
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aea12f |
* GnuTLS is free software; you can redistribute it and/or modify it
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aea12f |
* under the terms of the GNU General Public License as published by
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aea12f |
* the Free Software Foundation; either version 3 of the License, or
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aea12f |
* (at your option) any later version.
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*
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* GnuTLS is distributed in the hope that it will be useful, but
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aea12f |
* WITHOUT ANY WARRANTY; without even the implied warranty of
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aea12f |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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aea12f |
* General Public License for more details.
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aea12f |
*
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aea12f |
* You should have received a copy of the GNU General Public License
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aea12f |
* along with GnuTLS; if not, write to the Free Software Foundation,
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aea12f |
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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aea12f |
*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#if defined(_WIN32) || !defined(ENABLE_HEARTBEAT)
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aea12f |
int main()
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aea12f |
{
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exit(77);
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}
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#else
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#include <string.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include <signal.h>
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#include <gnutls/gnutls.h>
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#include <gnutls/dtls.h>
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#include "utils.h"
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static void terminate(void);
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/* This program tests the rehandshake in DTLS
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*/
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static void server_log_func(int level, const char *str)
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{
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fprintf(stderr, "server|<%d>| %s", level, str);
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}
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static void client_log_func(int level, const char *str)
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{
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fprintf(stderr, "client|<%d>| %s", level, str);
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}
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/* These are global */
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static pid_t child;
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/* A very basic DTLS client, with anonymous authentication, that exchanges heartbeats.
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*/
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#define MAX_BUF 1024
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static void client(int fd, int server_init)
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{
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gnutls_session_t session;
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int ret, ret2;
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char buffer[MAX_BUF + 1];
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gnutls_anon_client_credentials_t anoncred;
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/* Need to enable anonymous KX specifically. */
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global_init();
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if (debug) {
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gnutls_global_set_log_function(client_log_func);
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gnutls_global_set_log_level(4711);
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}
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gnutls_anon_allocate_client_credentials(&anoncred);
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/* Initialize TLS session
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*/
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gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_DATAGRAM);
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gnutls_heartbeat_enable(session, GNUTLS_HB_PEER_ALLOWED_TO_SEND);
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gnutls_dtls_set_mtu(session, 1500);
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/* Use default priorities */
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gnutls_priority_set_direct(session,
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"NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
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NULL);
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/* put the anonymous credentials to the current session
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*/
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gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
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gnutls_transport_set_int(session, fd);
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/* Perform the TLS handshake
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*/
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do {
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ret = gnutls_handshake(session);
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}
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while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
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if (ret < 0) {
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fail("client: Handshake failed\n");
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gnutls_perror(ret);
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exit(1);
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} else {
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if (debug)
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success("client: Handshake was completed\n");
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}
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if (debug)
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success("client: DTLS version is: %s\n",
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gnutls_protocol_get_name
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(gnutls_protocol_get_version(session)));
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aea12f |
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if (!server_init) {
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do {
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ret =
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gnutls_record_recv(session, buffer,
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sizeof(buffer));
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if (ret == GNUTLS_E_HEARTBEAT_PING_RECEIVED) {
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if (debug)
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success
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("Ping received. Replying with pong.\n");
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ret2 = gnutls_heartbeat_pong(session, 0);
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if (ret2 < 0) {
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fail("pong: %s\n",
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gnutls_strerror(ret));
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terminate();
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}
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}
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}
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while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED
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|| ret == GNUTLS_E_HEARTBEAT_PING_RECEIVED);
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if (ret < 0) {
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fail("recv: %s\n", gnutls_strerror(ret));
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aea12f |
terminate();
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aea12f |
}
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aea12f |
} else {
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aea12f |
do {
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ret =
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gnutls_heartbeat_ping(session, 256, 5,
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GNUTLS_HEARTBEAT_WAIT);
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if (debug)
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success("Ping sent.\n");
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aea12f |
}
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aea12f |
while (ret == GNUTLS_E_AGAIN
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|| ret == GNUTLS_E_INTERRUPTED);
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aea12f |
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aea12f |
if (ret < 0) {
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aea12f |
fail("ping: %s\n", gnutls_strerror(ret));
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aea12f |
terminate();
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|
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aea12f |
}
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aea12f |
}
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|
|
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gnutls_bye(session, GNUTLS_SHUT_WR);
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close(fd);
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gnutls_deinit(session);
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|
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gnutls_anon_free_client_credentials(anoncred);
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|
|
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gnutls_global_deinit();
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}
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|
|
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static gnutls_session_t initialize_tls_session(void)
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|
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{
|
|
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gnutls_session_t session;
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aea12f |
|
|
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gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM);
|
|
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gnutls_heartbeat_enable(session, GNUTLS_HB_PEER_ALLOWED_TO_SEND);
|
|
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gnutls_dtls_set_mtu(session, 1500);
|
|
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|
|
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/* avoid calling all the priority functions, since the defaults
|
|
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* are adequate.
|
|
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*/
|
|
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aea12f |
gnutls_priority_set_direct(session,
|
|
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"NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
|
|
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aea12f |
NULL);
|
|
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aea12f |
|
|
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return session;
|
|
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}
|
|
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|
|
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aea12f |
static void terminate(void)
|
|
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{
|
|
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aea12f |
int status;
|
|
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aea12f |
|
|
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aea12f |
kill(child, SIGTERM);
|
|
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aea12f |
wait(&status);
|
|
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aea12f |
exit(1);
|
|
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aea12f |
}
|
|
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|
|
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static void server(int fd, int server_init)
|
|
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aea12f |
{
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|
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aea12f |
int ret, ret2;
|
|
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aea12f |
char buffer[MAX_BUF + 1];
|
|
Packit |
aea12f |
gnutls_session_t session;
|
|
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aea12f |
gnutls_anon_server_credentials_t anoncred;
|
|
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aea12f |
/* this must be called once in the program
|
|
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aea12f |
*/
|
|
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aea12f |
global_init();
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|
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aea12f |
|
|
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aea12f |
if (debug) {
|
|
Packit |
aea12f |
gnutls_global_set_log_function(server_log_func);
|
|
Packit |
aea12f |
gnutls_global_set_log_level(4711);
|
|
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aea12f |
}
|
|
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aea12f |
|
|
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aea12f |
gnutls_anon_allocate_server_credentials(&anoncred);
|
|
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aea12f |
|
|
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aea12f |
session = initialize_tls_session();
|
|
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aea12f |
gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
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|
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aea12f |
|
|
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gnutls_transport_set_int(session, fd);
|
|
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aea12f |
|
|
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aea12f |
do {
|
|
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aea12f |
ret = gnutls_handshake(session);
|
|
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aea12f |
}
|
|
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aea12f |
while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
|
|
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aea12f |
if (ret < 0) {
|
|
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aea12f |
close(fd);
|
|
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aea12f |
gnutls_deinit(session);
|
|
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aea12f |
fail("server: Handshake has failed (%s)\n\n",
|
|
Packit |
aea12f |
gnutls_strerror(ret));
|
|
Packit |
aea12f |
terminate();
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success("server: Handshake was completed\n");
|
|
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aea12f |
|
|
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aea12f |
if (debug)
|
|
Packit |
aea12f |
success("server: TLS version is: %s\n",
|
|
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aea12f |
gnutls_protocol_get_name
|
|
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aea12f |
(gnutls_protocol_get_version(session)));
|
|
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aea12f |
|
|
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aea12f |
/* see the Getting peer's information example */
|
|
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/* print_info(session); */
|
|
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aea12f |
|
|
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aea12f |
if (server_init) {
|
|
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aea12f |
do {
|
|
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aea12f |
ret =
|
|
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aea12f |
gnutls_record_recv(session, buffer,
|
|
Packit |
aea12f |
sizeof(buffer));
|
|
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aea12f |
|
|
Packit |
aea12f |
if (ret == GNUTLS_E_HEARTBEAT_PING_RECEIVED) {
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success
|
|
Packit |
aea12f |
("Ping received. Replying with pong.\n");
|
|
Packit |
aea12f |
ret2 = gnutls_heartbeat_pong(session, 0);
|
|
Packit |
aea12f |
if (ret2 < 0) {
|
|
Packit |
aea12f |
fail("pong: %s\n",
|
|
Packit |
aea12f |
gnutls_strerror(ret));
|
|
Packit |
aea12f |
terminate();
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED
|
|
Packit |
aea12f |
|| ret == GNUTLS_E_HEARTBEAT_PING_RECEIVED);
|
|
Packit |
aea12f |
} else {
|
|
Packit |
aea12f |
do {
|
|
Packit |
aea12f |
ret =
|
|
Packit |
aea12f |
gnutls_heartbeat_ping(session, 256, 5,
|
|
Packit |
aea12f |
GNUTLS_HEARTBEAT_WAIT);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success("Ping sent.\n");
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
while (ret == GNUTLS_E_AGAIN
|
|
Packit |
aea12f |
|| ret == GNUTLS_E_INTERRUPTED);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (ret < 0) {
|
|
Packit |
aea12f |
fail("ping: %s\n", gnutls_strerror(ret));
|
|
Packit |
aea12f |
terminate();
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* do not wait for the peer to close the connection.
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
gnutls_bye(session, GNUTLS_SHUT_WR);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
close(fd);
|
|
Packit |
aea12f |
gnutls_deinit(session);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_anon_free_server_credentials(anoncred);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_global_deinit();
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success("server: finished\n");
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static void start(int server_initiated)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
int fd[2];
|
|
Packit |
aea12f |
int ret;
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
signal(SIGPIPE, SIG_IGN);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
|
|
Packit |
aea12f |
if (ret < 0) {
|
|
Packit |
aea12f |
perror("socketpair");
|
|
Packit |
aea12f |
exit(1);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
child = fork();
|
|
Packit |
aea12f |
if (child < 0) {
|
|
Packit |
aea12f |
perror("fork");
|
|
Packit |
aea12f |
fail("fork");
|
|
Packit |
aea12f |
exit(1);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (child) {
|
|
Packit |
aea12f |
int status;
|
|
Packit |
aea12f |
/* parent */
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
server(fd[0], server_initiated);
|
|
Packit |
aea12f |
wait(&status);
|
|
Packit |
aea12f |
check_wait_status(status);
|
|
Packit |
aea12f |
} else {
|
|
Packit |
aea12f |
close(fd[0]);
|
|
Packit |
aea12f |
client(fd[1], server_initiated);
|
|
Packit |
aea12f |
exit(0);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
void doit(void)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
start(0);
|
|
Packit |
aea12f |
start(1);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#endif /* _WIN32 */
|