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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
- * USA.
- */
-
- package com.tigervnc.rfb;
-
- import java.nio.*;
-
- import com.tigervnc.rdr.*;
- import com.tigervnc.vncviewer.*;
-
- public class CSecurityVncAuth extends CSecurity {
-
- public CSecurityVncAuth() { }
-
- private static final int vncAuthChallengeSize = 16;
-
- public boolean processMsg(CConnection cc)
- {
- InStream is = cc.getInStream();
- OutStream os = cc.getOutStream();
-
- // Read the challenge & obtain the user's password
- ByteBuffer challenge = ByteBuffer.allocate(vncAuthChallengeSize);
- is.readBytes(challenge, vncAuthChallengeSize);
- StringBuffer passwd = new StringBuffer();
- upg.getUserPasswd(cc.isSecure(), null, passwd);
-
- // Calculate the correct response
- byte[] key = new byte[8];
- int pwdLen = passwd.length();
- byte[] utf8str = new byte[pwdLen];
- try {
- utf8str = passwd.toString().getBytes("UTF8");
- } catch(java.io.UnsupportedEncodingException e) {
- e.printStackTrace();
- }
- for (int i=0; i<8; i++)
- key[i] = i<pwdLen ? utf8str[i] : 0;
- DesCipher des = new DesCipher(key);
- for (int j = 0; j < vncAuthChallengeSize; j += 8)
- des.encrypt(challenge.array(),j,challenge.array(),j);
-
- // Return the response to the server
- os.writeBytes(challenge.array(), 0, vncAuthChallengeSize);
- os.flush();
- return true;
- }
-
- public int getType() { return Security.secTypeVncAuth; }
- public String description() { return "No Encryption"; }
-
- static LogWriter vlog = new LogWriter("VncAuth");
- }
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