88 lines
2.0 KiB
Java
88 lines
2.0 KiB
Java
/*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jserver.util.crypt;
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import java.io.IOException;
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import com.l2jserver.util.Rnd;
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/**
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* @author KenM
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*/
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public class LoginCrypt
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{
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private static final byte[] STATIC_BLOWFISH_KEY =
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{
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(byte) 0x6b,
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(byte) 0x60,
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(byte) 0xcb,
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(byte) 0x5b,
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(byte) 0x82,
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(byte) 0xce,
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(byte) 0x90,
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(byte) 0xb1,
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(byte) 0xcc,
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(byte) 0x2b,
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(byte) 0x6c,
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(byte) 0x55,
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(byte) 0x6c,
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(byte) 0x6c,
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(byte) 0x6c,
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(byte) 0x6c
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};
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private final NewCrypt _staticCrypt = new NewCrypt(STATIC_BLOWFISH_KEY);
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private NewCrypt _crypt;
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private boolean _static = true;
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public void setKey(byte[] key)
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{
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_crypt = new NewCrypt(key);
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}
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public boolean decrypt(byte[] raw, final int offset, final int size) throws IOException
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{
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_crypt.decrypt(raw, offset, size);
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return NewCrypt.verifyChecksum(raw, offset, size);
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}
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public int encrypt(byte[] raw, final int offset, int size) throws IOException
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{
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// reserve checksum
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size += 4;
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if (_static)
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{
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// reserve for XOR "key"
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size += 4;
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// padding
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size += 8 - (size % 8);
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NewCrypt.encXORPass(raw, offset, size, Rnd.nextInt());
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_staticCrypt.crypt(raw, offset, size);
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_static = false;
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}
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else
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{
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// padding
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size += 8 - (size % 8);
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NewCrypt.appendChecksum(raw, offset, size);
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_crypt.crypt(raw, offset, size);
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}
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return size;
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}
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}
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