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