Project update.

trunk/java/com/l2jmobius/gameserver/network/BlowFishKeygen.java

@@ -0,0 +1,67 @@
+/*
+ * This file is part of the L2J Mobius project.
+ * 
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.l2jmobius.gameserver.network;
+
+import com.l2jmobius.util.Rnd;
+
+/**
+ * Blowfish keygen for GameServer client connections.
+ * @author KenM
+ */
+public class BlowFishKeygen
+{
+	private static final int CRYPT_KEYS_SIZE = 20;
+	private static final byte[][] CRYPT_KEYS = new byte[CRYPT_KEYS_SIZE][16];
+	static
+	{
+		// init the GS encryption keys on class load
+		
+		for (int i = 0; i < CRYPT_KEYS_SIZE; i++)
+		{
+			// randomize the 8 first bytes
+			for (int j = 0; j < CRYPT_KEYS[i].length; j++)
+			{
+				CRYPT_KEYS[i][j] = (byte) Rnd.get(255);
+			}
+			
+			// the last 8 bytes are static
+			CRYPT_KEYS[i][8] = (byte) 0xc8;
+			CRYPT_KEYS[i][9] = (byte) 0x27;
+			CRYPT_KEYS[i][10] = (byte) 0x93;
+			CRYPT_KEYS[i][11] = (byte) 0x01;
+			CRYPT_KEYS[i][12] = (byte) 0xa1;
+			CRYPT_KEYS[i][13] = (byte) 0x6c;
+			CRYPT_KEYS[i][14] = (byte) 0x31;
+			CRYPT_KEYS[i][15] = (byte) 0x97;
+		}
+	}
+	
+	// block instantiation
+	private BlowFishKeygen()
+	{
+	}
+	
+	/**
+	 * Returns a key from this keygen pool, the logical ownership is retained by this keygen.<BR>
+	 * Thus when getting a key with interests other then read-only a copy must be performed.<BR>
+	 * @return A key from this keygen pool.
+	 */
+	public static byte[] getRandomKey()
+	{
+		return CRYPT_KEYS[Rnd.get(CRYPT_KEYS_SIZE)];
+	}
+}