mirror of
https://github.com/Rogiel/l2jserver2
synced 2025-12-06 07:32:46 +00:00
84 lines
2.7 KiB
Java
84 lines
2.7 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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/*
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* This file is part of l2jserver <l2jserver.com>.
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*
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* l2jserver 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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* l2jserver 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 l2jserver. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jserver.util;
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import java.util.Random;
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/**
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* Blowfish keygen for GameServer client connections
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*
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* @author KenM
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*/
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public class BlowFishKeygen {
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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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private static final Random random = new Random();
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static {
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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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// randomize the 8 first bytes
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for (int j = 0; j < CRYPT_KEYS[i].length; j++) {
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CRYPT_KEYS[i][j] = (byte) random.nextInt(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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* Returns a key from this keygen pool, the logical ownership is retained by
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* this keygen.<BR>
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* Thus when getting a key with interests other then read-only a copy must
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* be performed.<BR>
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*
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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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return CRYPT_KEYS[random.nextInt(CRYPT_KEYS_SIZE)];
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}
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}
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