69 lines
2.2 KiB
Java
69 lines
2.2 KiB
Java
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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package com.tigervnc.rfb;
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import java.nio.*;
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import com.tigervnc.rdr.*;
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import com.tigervnc.vncviewer.*;
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public class CSecurityVncAuth extends CSecurity {
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public CSecurityVncAuth() { }
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private static final int vncAuthChallengeSize = 16;
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public boolean processMsg(CConnection cc)
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{
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InStream is = cc.getInStream();
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OutStream os = cc.getOutStream();
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// Read the challenge & obtain the user's password
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ByteBuffer challenge = ByteBuffer.allocate(vncAuthChallengeSize);
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is.readBytes(challenge, vncAuthChallengeSize);
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StringBuffer passwd = new StringBuffer();
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upg.getUserPasswd(cc.isSecure(), null, passwd);
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// Calculate the correct response
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byte[] key = new byte[8];
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int pwdLen = passwd.length();
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byte[] utf8str = new byte[pwdLen];
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try {
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utf8str = passwd.toString().getBytes("UTF8");
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} catch(java.io.UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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for (int i=0; i<8; i++)
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key[i] = i<pwdLen ? utf8str[i] : 0;
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DesCipher des = new DesCipher(key);
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for (int j = 0; j < vncAuthChallengeSize; j += 8)
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des.encrypt(challenge.array(),j,challenge.array(),j);
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// Return the response to the server
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os.writeBytes(challenge.array(), 0, vncAuthChallengeSize);
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os.flush();
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return true;
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}
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public int getType() { return Security.secTypeVncAuth; }
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public String description() { return "No Encryption"; }
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static LogWriter vlog = new LogWriter("VncAuth");
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}
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