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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* 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.
*/
//
// CSecurityVncAuth
//
// XXX not thread-safe, because d3des isn't - do we need to worry about this?
//
#include <string.h>
#include <stdio.h>
#include <rfb/CConnection.h>
#include <rfb/UserPasswdGetter.h>
#include <rfb/Password.h>
#include <rfb/CSecurityVncAuth.h>
#include <rfb/util.h>
extern "C" {
#include <rfb/d3des.h>
}
using namespace rfb;
static const int vncAuthChallengeSize = 16;
CSecurityVncAuth::CSecurityVncAuth(UserPasswdGetter* upg_)
: upg(upg_)
{
}
CSecurityVncAuth::~CSecurityVncAuth()
{
}
bool CSecurityVncAuth::processMsg(CConnection* cc)
{
rdr::InStream* is = cc->getInStream();
rdr::OutStream* os = cc->getOutStream();
// Read the challenge & obtain the user's password
rdr::U8 challenge[vncAuthChallengeSize];
is->readBytes(challenge, vncAuthChallengeSize);
PlainPasswd passwd;
upg->getUserPasswd(0, &passwd.buf);
// Calculate the correct response
rdr::U8 key[8];
int pwdLen = strlen(passwd.buf);
for (int i=0; i<8; i++)
key[i] = i<pwdLen ? passwd.buf[i] : 0;
deskey(key, EN0);
for (int j = 0; j < vncAuthChallengeSize; j += 8)
des(challenge+j, challenge+j);
// Return the response to the server
os->writeBytes(challenge, vncAuthChallengeSize);
os->flush();
return true;
}
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