/*
* Copyright (C) 2004-2016 Free Software Foundation, Inc.
*
* Author: Thierry Quemerais, 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
*/
/* This program tests whether an extension is exchanged when registered
* at the session level */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#if defined(_WIN32)
/* socketpair isn't supported on Win32. */
int main(int argc, char **argv)
{
exit(77);
}
#else
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#if !defined(_WIN32)
#include <sys/wait.h>
#include <signal.h>
#endif
#include <unistd.h>
#include <gnutls/gnutls.h>
#include "utils.h"
#include "cert-common.h"
const char *side = "";
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s|<%d>| %s", side, level, str);
}
#define TLSEXT_TYPE_SAMPLE 0xF1
#define TLSEXT_TYPE_IGN 0xF2
static int TLSEXT_TYPE_client_sent = 0;
static int TLSEXT_TYPE_client_received = 0;
static int TLSEXT_TYPE_server_sent = 0;
static int TLSEXT_TYPE_server_received = 0;
static int ign_extension_called = 0;
static const unsigned char ext_data[] =
{
0xFE,
0xED
};
static int ext_recv_client_params(gnutls_session_t session, const unsigned char *buf, size_t buflen)
{
if (buflen != sizeof(ext_data))
fail("ext_recv_client_params: Invalid input buffer length\n");
if (memcmp(buf, ext_data, sizeof(ext_data)) != 0)
fail("ext_recv_client_params: Invalid input buffer data\n");
TLSEXT_TYPE_client_received = 1;
gnutls_ext_set_data(session, TLSEXT_TYPE_SAMPLE, session);
return 0; //Success
}
static int ext_send_client_params(gnutls_session_t session, gnutls_buffer_t extdata)
{
TLSEXT_TYPE_client_sent = 1;
gnutls_buffer_append_data(extdata, ext_data, sizeof(ext_data));
return sizeof(ext_data);
}
static int ext_recv_client_ign_params(gnutls_session_t session, const unsigned char *buf, size_t buflen)
{
return 0;
}
static int ext_send_client_ign_params(gnutls_session_t session, gnutls_buffer_t extdata)
{
ign_extension_called = 1;
return 0;
}
static int ext_recv_server_params(gnutls_session_t session, const unsigned char *buf, size_t buflen)
{
if (buflen != sizeof(ext_data))
fail("ext_recv_server_params: Invalid input buffer length\n");
if (memcmp(buf, ext_data, sizeof(ext_data)) != 0)
fail("ext_recv_server_params: Invalid input buffer data\n");
TLSEXT_TYPE_server_received = 1;
return 0; //Success
}
static int ext_send_server_params(gnutls_session_t session, gnutls_buffer_t extdata)
{
TLSEXT_TYPE_server_sent = 1;
gnutls_buffer_append_data(extdata, ext_data, sizeof(ext_data));
return sizeof(ext_data);
}
static void client(int sd)
{
int ret;
gnutls_session_t session;
gnutls_certificate_credentials_t clientx509cred;
void *p;
global_init();
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(4711);
side = "client";
gnutls_certificate_allocate_credentials(&clientx509cred);
/* Initialize TLS session
*/
gnutls_init(&session, GNUTLS_CLIENT);
/* Use default priorities */
gnutls_priority_set_direct(session, "PERFORMANCE:+ANON-ECDH:+ANON-DH",
NULL);
/* put the anonymous credentials to the current session
*/
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
clientx509cred);
gnutls_transport_set_int(session, sd);
gnutls_handshake_set_timeout(session, 20 * 1000);
ret = gnutls_session_ext_register(session, "ext_ign", TLSEXT_TYPE_IGN, GNUTLS_EXT_TLS, ext_recv_client_ign_params, ext_send_client_ign_params, NULL, NULL, NULL, 0);
if (ret < 0)
fail("client: register extension\n");
ret = gnutls_session_ext_register(session, "ext_client", TLSEXT_TYPE_SAMPLE, GNUTLS_EXT_TLS, ext_recv_client_params, ext_send_client_params, NULL, NULL, NULL, 0);
if (ret < 0)
fail("client: register extension\n");
/* Perform the TLS handshake
*/
ret = gnutls_handshake(session);
if (ret < 0) {
fail("client: Handshake failed\n");
gnutls_perror(ret);
goto end;
} else {
if (debug)
success("client: Handshake was completed\n");
}
if (TLSEXT_TYPE_client_sent != 1 || TLSEXT_TYPE_client_received != 1)
fail("client: extension not properly sent/received\n");
ret = gnutls_ext_get_data(session, TLSEXT_TYPE_SAMPLE, &p);
if (ret < 0) {
fail("gnutls_ext_get_data: %s\n", gnutls_strerror(ret));
}
if (p != session) {
fail("client: gnutls_ext_get_data failed\n");
}
if (ign_extension_called == 0) {
fail("registered ign extension was not called\n");
}
gnutls_bye(session, GNUTLS_SHUT_RDWR);
end:
close(sd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(clientx509cred);
gnutls_global_deinit();
}
static void server(int sd)
{
gnutls_certificate_credentials_t serverx509cred;
int ret;
gnutls_session_t session;
unsigned i;
/* this must be called once in the program
*/
global_init();
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(4711);
side = "server";
gnutls_certificate_allocate_credentials(&serverx509cred);
gnutls_certificate_set_x509_key_mem(serverx509cred,
&server_cert, &server_key,
GNUTLS_X509_FMT_PEM);
gnutls_init(&session, GNUTLS_SERVER);
/* avoid calling all the priority functions, since the defaults
* are adequate.
*/
gnutls_priority_set_direct(session, "PERFORMANCE:+ANON-ECDH:+ANON-DH",
NULL);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
serverx509cred);
gnutls_session_ext_register(session, "ext_server", TLSEXT_TYPE_SAMPLE, GNUTLS_EXT_TLS, ext_recv_server_params, ext_send_server_params, NULL, NULL, NULL, 0);
gnutls_transport_set_int(session, sd);
gnutls_handshake_set_timeout(session, 20 * 1000);
ret = gnutls_handshake(session);
if (ret < 0) {
close(sd);
gnutls_deinit(session);
fail("server: Handshake has failed (%s)\n\n",
gnutls_strerror(ret));
return;
}
if (debug)
success("server: Handshake was completed\n");
if (TLSEXT_TYPE_server_sent != 1 || TLSEXT_TYPE_server_received != 1)
fail("server: extension not properly sent/received\n");
/* do not wait for the peer to close the connection.
*/
gnutls_bye(session, GNUTLS_SHUT_WR);
/* check whether we can crash the library by adding many extensions */
for (i=0;i<64;i++) {
ret = gnutls_ext_register("ext_serverxx", TLSEXT_TYPE_SAMPLE+i+1, GNUTLS_EXT_TLS, ext_recv_server_params, ext_send_server_params, NULL, NULL, NULL);
if (ret < 0) {
success("failed registering extension no %d (expected)\n", i+1);
break;
}
}
close(sd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(serverx509cred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
void doit(void)
{
pid_t child;
int sockets[2];
int err;
signal(SIGPIPE, SIG_IGN);
err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
if (err == -1) {
perror("socketpair");
fail("socketpair failed\n");
return;
}
child = fork();
if (child < 0) {
perror("fork");
fail("fork");
return;
}
if (child) {
int status;
/* parent */
close(sockets[1]);
server(sockets[0]);
wait(&status);
} else {
close(sockets[0]);
client(sockets[1]);
}
}
#endif /* _WIN32 */