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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;
public class VncAuth {
public static final int ok = 0;
public static final int failed = 1;
public static final int tooMany = 2; // deprecated
public static final int challengeSize = 16;
public static void encryptChallenge(byte[] challenge, String passwd) {
byte[] key = new byte[8];
for (int i = 0; i < 8 && i < passwd.length(); i++) {
key[i] = (byte)passwd.charAt(i);
}
DesCipher des = new DesCipher(key);
for (int j = 0; j < challengeSize; j += 8)
des.encrypt(challenge,j,challenge,j);
}
void obfuscatePasswd(String passwd, byte[] obfuscated) {
for (int i = 0; i < 8; i++) {
if (i < passwd.length())
obfuscated[i] = (byte)passwd.charAt(i);
else
obfuscated[i] = 0;
}
DesCipher des = new DesCipher(obfuscationKey);
des.encrypt(obfuscated,0,obfuscated,0);
}
public static String unobfuscatePasswd(byte[] obfuscated) {
DesCipher des = new DesCipher(obfuscationKey);
des.decrypt(obfuscated,0,obfuscated,0);
int len;
for (len = 0; len < 8; len++) {
if (obfuscated[len] == 0) break;
}
char[] plain = new char[len];
for (int i = 0; i < len; i++) {
plain[i] = (char)obfuscated[i];
}
return new String(plain);
}
static byte[] obfuscationKey = {23,82,107,6,35,78,88,7};
}
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