72 lines
2.0 KiB
Java
72 lines
2.0 KiB
Java
/*
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* Copyright (C) 2004-2015 L2J Server
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*
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* This file is part of L2J Server.
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*
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* L2J Server 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 3 of the License, or
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* (at your option) any later version.
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*
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* L2J Server 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 GNU
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* 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 program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jserver.gameserver.network;
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import com.l2jserver.util.Rnd;
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/**
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* Blowfish keygen for GameServer client connections.
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* @author KenM
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*/
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public class BlowFishKeygen
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{
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private static final int CRYPT_KEYS_SIZE = 20;
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private static final byte[][] CRYPT_KEYS = new byte[CRYPT_KEYS_SIZE][16];
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static
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{
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// init the GS encryption keys on class load
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for (int i = 0; i < CRYPT_KEYS_SIZE; i++)
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{
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// randomize the 8 first bytes
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for (int j = 0; j < CRYPT_KEYS[i].length; j++)
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{
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CRYPT_KEYS[i][j] = (byte) Rnd.get(255);
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}
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// the last 8 bytes are static
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CRYPT_KEYS[i][8] = (byte) 0xc8;
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CRYPT_KEYS[i][9] = (byte) 0x27;
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CRYPT_KEYS[i][10] = (byte) 0x93;
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CRYPT_KEYS[i][11] = (byte) 0x01;
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CRYPT_KEYS[i][12] = (byte) 0xa1;
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CRYPT_KEYS[i][13] = (byte) 0x6c;
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CRYPT_KEYS[i][14] = (byte) 0x31;
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CRYPT_KEYS[i][15] = (byte) 0x97;
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}
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}
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// block instantiation
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private BlowFishKeygen()
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{
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}
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/**
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* Returns a key from this keygen pool, the logical ownership is retained by this keygen.<BR>
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* Thus when getting a key with interests other then read-only a copy must be performed.<BR>
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* @return A key from this keygen pool.
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*/
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public static byte[] getRandomKey()
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{
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return CRYPT_KEYS[Rnd.get(CRYPT_KEYS_SIZE)];
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}
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}
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