|
Packit |
aea12f |
/*
|
|
Packit |
aea12f |
* Copyright (C) 2004-2012 Free Software Foundation, Inc.
|
|
Packit |
aea12f |
* Copyright (C) 2013 Adam Sampson <ats@offog.org>
|
|
Packit |
aea12f |
*
|
|
Packit |
aea12f |
* Author: Simon Josefsson
|
|
Packit |
aea12f |
*
|
|
Packit |
aea12f |
* This file is part of GnuTLS.
|
|
Packit |
aea12f |
*
|
|
Packit |
aea12f |
* GnuTLS is free software; you can redistribute it and/or modify it
|
|
Packit |
aea12f |
* under the terms of the GNU General Public License as published by
|
|
Packit |
aea12f |
* the Free Software Foundation; either version 3 of the License, or
|
|
Packit |
aea12f |
* (at your option) any later version.
|
|
Packit |
aea12f |
*
|
|
Packit |
aea12f |
* GnuTLS is distributed in the hope that it will be useful, but
|
|
Packit |
aea12f |
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
aea12f |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
aea12f |
* General Public License for more details.
|
|
Packit |
aea12f |
*
|
|
Packit |
aea12f |
* You should have received a copy of the GNU General Public License
|
|
Packit |
aea12f |
* along with GnuTLS; if not, write to the Free Software Foundation,
|
|
Packit |
aea12f |
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* Parts copied from GnuTLS example programs. */
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#ifdef HAVE_CONFIG_H
|
|
Packit |
aea12f |
#include <config.h>
|
|
Packit |
aea12f |
#endif
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#include <stdio.h>
|
|
Packit |
aea12f |
#include <stdlib.h>
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#if defined(_WIN32)
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* socketpair isn't supported on Win32. */
|
|
Packit |
aea12f |
int main(int argc, char **argv)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
exit(77);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#else
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#include <string.h>
|
|
Packit |
aea12f |
#include <sys/types.h>
|
|
Packit |
aea12f |
#include <sys/socket.h>
|
|
Packit |
aea12f |
#if !defined(_WIN32)
|
|
Packit |
aea12f |
#include <sys/wait.h>
|
|
Packit |
aea12f |
#endif
|
|
Packit |
aea12f |
#include <unistd.h>
|
|
Packit |
aea12f |
#include <gnutls/gnutls.h>
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#include "utils.h"
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* A very basic TLS client, with PSK authentication.
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#define MAX_BUF 1024
|
|
Packit |
aea12f |
#define MSG "Hello TLS"
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static void tls_log_func(int level, const char *str)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
fprintf(stderr, "|<%d>| %s", level, str);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static void client(int sd)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
int ret, ii;
|
|
Packit |
aea12f |
gnutls_session_t session;
|
|
Packit |
aea12f |
char buffer[MAX_BUF + 1];
|
|
Packit |
aea12f |
gnutls_psk_client_credentials_t pskcred;
|
|
Packit |
aea12f |
const gnutls_datum_t key = { (void *) "DEADBEEF", 8 };
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
global_init();
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_global_set_log_function(tls_log_func);
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
gnutls_global_set_log_level(5);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_psk_allocate_client_credentials(&pskcred);
|
|
Packit |
aea12f |
gnutls_psk_set_client_credentials(pskcred, "test", &key,
|
|
Packit |
aea12f |
GNUTLS_PSK_KEY_HEX);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* Initialize TLS session
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
gnutls_init(&session, GNUTLS_CLIENT);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* Use default priorities */
|
|
Packit |
aea12f |
gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.2:+DHE-PSK", NULL);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* put the anonymous credentials to the current session
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
gnutls_credentials_set(session, GNUTLS_CRD_PSK, pskcred);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_transport_set_int(session, sd);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* Perform the TLS handshake
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
ret = gnutls_handshake(session);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (ret < 0) {
|
|
Packit |
aea12f |
fail("client: Handshake failed\n");
|
|
Packit |
aea12f |
gnutls_perror(ret);
|
|
Packit |
aea12f |
goto end;
|
|
Packit |
aea12f |
} else {
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success("client: Handshake was completed\n");
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
print_dh_params_info(session);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_record_send(session, MSG, strlen(MSG));
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
ret = gnutls_record_recv(session, buffer, MAX_BUF);
|
|
Packit |
aea12f |
if (ret == 0) {
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success
|
|
Packit |
aea12f |
("client: Peer has closed the TLS connection\n");
|
|
Packit |
aea12f |
goto end;
|
|
Packit |
aea12f |
} else if (ret < 0) {
|
|
Packit |
aea12f |
fail("client: Error: %s\n", gnutls_strerror(ret));
|
|
Packit |
aea12f |
goto end;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (debug) {
|
|
Packit |
aea12f |
printf("- Received %d bytes: ", ret);
|
|
Packit |
aea12f |
for (ii = 0; ii < ret; ii++)
|
|
Packit |
aea12f |
fputc(buffer[ii], stdout);
|
|
Packit |
aea12f |
fputs("\n", stdout);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_bye(session, GNUTLS_SHUT_RDWR);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
end:
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
close(sd);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_deinit(session);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_psk_free_client_credentials(pskcred);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_global_deinit();
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* This is a sample TLS 1.0 echo server, for PSK authentication.
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#define MAX_BUF 1024
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* These are global */
|
|
Packit |
aea12f |
gnutls_psk_server_credentials_t server_pskcred;
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static gnutls_session_t initialize_tls_session(void)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
gnutls_session_t session;
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_init(&session, GNUTLS_SERVER);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* avoid calling all the priority functions, since the defaults
|
|
Packit |
aea12f |
* are adequate.
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.2:+DHE-PSK", NULL);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_handshake_set_timeout(session, 20 * 1000);
|
|
Packit |
aea12f |
gnutls_credentials_set(session, GNUTLS_CRD_PSK, server_pskcred);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
return session;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static gnutls_dh_params_t dh_params;
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static int generate_dh_params(void)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
const gnutls_datum_t p3 = { (void *) pkcs3, strlen(pkcs3) };
|
|
Packit |
aea12f |
/* Generate Diffie-Hellman parameters - for use with DHE
|
|
Packit |
aea12f |
* kx algorithms. These should be discarded and regenerated
|
|
Packit |
aea12f |
* once a day, once a week or once a month. Depending on the
|
|
Packit |
aea12f |
* security requirements.
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
gnutls_dh_params_init(&dh_params);
|
|
Packit |
aea12f |
return gnutls_dh_params_import_pkcs3(dh_params, &p3,
|
|
Packit |
aea12f |
GNUTLS_X509_FMT_PEM);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static int
|
|
Packit |
aea12f |
pskfunc(gnutls_session_t session, const char *username,
|
|
Packit |
aea12f |
gnutls_datum_t * key)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
printf("psk callback to get %s's password\n", username);
|
|
Packit |
aea12f |
key->data = gnutls_malloc(4);
|
|
Packit |
aea12f |
key->data[0] = 0xDE;
|
|
Packit |
aea12f |
key->data[1] = 0xAD;
|
|
Packit |
aea12f |
key->data[2] = 0xBE;
|
|
Packit |
aea12f |
key->data[3] = 0xEF;
|
|
Packit |
aea12f |
key->size = 4;
|
|
Packit |
aea12f |
return 0;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
int err, ret;
|
|
Packit |
aea12f |
char topbuf[512];
|
|
Packit |
aea12f |
gnutls_session_t session;
|
|
Packit |
aea12f |
char buffer[MAX_BUF + 1];
|
|
Packit |
aea12f |
int optval = 1;
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static void server(int sd)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
/* this must be called once in the program
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
global_init();
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_global_set_log_function(tls_log_func);
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
gnutls_global_set_log_level(4711);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
generate_dh_params();
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_psk_allocate_server_credentials(&server_pskcred);
|
|
Packit |
aea12f |
gnutls_psk_set_server_credentials_function(server_pskcred,
|
|
Packit |
aea12f |
pskfunc);
|
|
Packit |
aea12f |
gnutls_psk_set_server_dh_params(server_pskcred, dh_params);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
session = initialize_tls_session();
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_transport_set_int(session, sd);
|
|
Packit |
aea12f |
ret = gnutls_handshake(session);
|
|
Packit |
aea12f |
if (ret < 0) {
|
|
Packit |
aea12f |
close(sd);
|
|
Packit |
aea12f |
gnutls_deinit(session);
|
|
Packit |
aea12f |
fail("server: Handshake has failed (%s)\n\n",
|
|
Packit |
aea12f |
gnutls_strerror(ret));
|
|
Packit |
aea12f |
return;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success("server: Handshake was completed\n");
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
print_dh_params_info(session);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* see the Getting peer's information example */
|
|
Packit |
aea12f |
/* print_info(session); */
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
for (;;) {
|
|
Packit |
aea12f |
memset(buffer, 0, MAX_BUF + 1);
|
|
Packit |
aea12f |
ret = gnutls_record_recv(session, buffer, MAX_BUF);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (ret == 0) {
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success
|
|
Packit |
aea12f |
("server: Peer has closed the GnuTLS connection\n");
|
|
Packit |
aea12f |
break;
|
|
Packit |
aea12f |
} else if (ret < 0) {
|
|
Packit |
aea12f |
fail("server: Received corrupted data(%d). Closing...\n", ret);
|
|
Packit |
aea12f |
break;
|
|
Packit |
aea12f |
} else if (ret > 0) {
|
|
Packit |
aea12f |
/* echo data back to the client
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
gnutls_record_send(session, buffer,
|
|
Packit |
aea12f |
strlen(buffer));
|
|
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(sd);
|
|
Packit |
aea12f |
gnutls_deinit(session);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_psk_free_server_credentials(server_pskcred);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_dh_params_deinit(dh_params);
|
|
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 |
void doit(void)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
pid_t child;
|
|
Packit |
aea12f |
int sockets[2];
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
|
|
Packit |
aea12f |
if (err == -1) {
|
|
Packit |
aea12f |
perror("socketpair");
|
|
Packit |
aea12f |
fail("socketpair failed\n");
|
|
Packit |
aea12f |
return;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
child = fork();
|
|
Packit |
aea12f |
if (child < 0) {
|
|
Packit |
aea12f |
perror("fork");
|
|
Packit |
aea12f |
fail("fork");
|
|
Packit |
aea12f |
return;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (child) {
|
|
Packit |
aea12f |
int status;
|
|
Packit |
aea12f |
/* parent */
|
|
Packit |
aea12f |
server(sockets[0]);
|
|
Packit |
aea12f |
wait(&status);
|
|
Packit |
aea12f |
check_wait_status(status);
|
|
Packit |
aea12f |
} else {
|
|
Packit |
aea12f |
client(sockets[1]);
|
|
Packit |
aea12f |
exit(0);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#endif /* _WIN32 */
|