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/*
* Copyright (C) 2004 Red Hat Inc.
* Copyright (C) 2005 Martin Koegler
* Copyright (C) 2010 TigerVNC Team
*
* This 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 2 of the License, or
* (at your option) any later version.
*
* This software 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 this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_GNUTLS
#include <rfb/CSecurityTLSBase.h>
#include <rfb/CConnection.h>
#include <rfb/LogWriter.h>
#include <rfb/Exception.h>
#include <rdr/TLSInStream.h>
#include <rdr/TLSOutStream.h>
#define TLS_DEBUG
using namespace rfb;
static LogWriter vlog("TLS");
#ifdef TLS_DEBUG
static void debug_log(int level, const char* str)
{
vlog.debug(str);
}
#endif
void CSecurityTLSBase::initGlobal()
{
static bool globalInitDone = false;
if (!globalInitDone) {
gnutls_global_init();
#ifdef TLS_DEBUG
gnutls_global_set_log_level(10);
gnutls_global_set_log_function(debug_log);
#endif
globalInitDone = true;
}
}
CSecurityTLSBase::CSecurityTLSBase() : session(0)
{
fis = 0;
fos = 0;
}
void CSecurityTLSBase::shutdown()
{
if(session)
;//gnutls_bye(session, GNUTLS_SHUT_RDWR);
}
CSecurityTLSBase::~CSecurityTLSBase()
{
if (session) {
//gnutls_bye(session, GNUTLS_SHUT_RDWR);
gnutls_deinit (session);
session = 0;
}
if (fis)
delete fis;
if (fos)
delete fos;
/* FIXME: should be doing gnutls_global_deinit() at some point */
}
bool CSecurityTLSBase::processMsg(CConnection* cc)
{
rdr::InStream* is = cc->getInStream();
rdr::OutStream* os = cc->getOutStream();
client = cc;
initGlobal();
if (!session) {
if (!is->checkNoWait(1))
return false;
if (is->readU8() == 0)
return true;
gnutls_init(&session, GNUTLS_CLIENT);
gnutls_set_default_priority(session);
setParam(session);
gnutls_transport_set_pull_function(session, rdr::gnutls_InStream_pull);
gnutls_transport_set_push_function(session, rdr::gnutls_OutStream_push);
gnutls_transport_set_ptr2(session,
(gnutls_transport_ptr) is,
(gnutls_transport_ptr) os);
}
int err;
err = gnutls_handshake(session);
if (err != GNUTLS_E_SUCCESS && !gnutls_error_is_fatal(err))
return false;
if (err != GNUTLS_E_SUCCESS) {
vlog.error("TLS Handshake failed: %s\n", gnutls_strerror (err));
gnutls_bye(session, GNUTLS_SHUT_RDWR);
freeResources();
gnutls_deinit(session);
session = 0;
throw AuthFailureException("TLS Handshake failed");
}
checkSession(session);
cc->setStreams(fis = new rdr::TLSInStream(is, session),
fos = new rdr::TLSOutStream(os, session));
return true;
}
#endif /* HAVE_GNUTLS */
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