/*

 * Copyright (C) 2004-2018 L2J Server

 * 

 * This file is part of L2J Server.

 * 

 * L2J Server 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.

 * 

 * L2J Server 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.l2jserver.loginserver.network.gameserverpackets;



import java.security.GeneralSecurityException;

import java.util.logging.Level;

import java.util.logging.Logger;



import javax.crypto.Cipher;



import com.l2jserver.Config;

import com.l2jserver.loginserver.GameServerThread;

import com.l2jserver.loginserver.network.L2JGameServerPacketHandler.GameServerState;

import com.l2jserver.util.crypt.NewCrypt;

import com.l2jserver.util.network.BaseRecievePacket;



/**

 * @author -Wooden-

 */

public class BlowFishKey extends BaseRecievePacket

{

	protected static final Logger _log = Logger.getLogger(BlowFishKey.class.getName());

	

	/**

	 * @param decrypt

	 * @param server

	 */

	public BlowFishKey(byte[] decrypt, GameServerThread server)

	{

		super(decrypt);

		int size = readD();

		byte[] tempKey = readB(size);

		try

		{

			byte[] tempDecryptKey;

			Cipher rsaCipher = Cipher.getInstance("RSA/ECB/nopadding");

			rsaCipher.init(Cipher.DECRYPT_MODE, server.getPrivateKey());

			tempDecryptKey = rsaCipher.doFinal(tempKey);

			// there are nulls before the key we must remove them

			int i = 0;

			int len = tempDecryptKey.length;

			for (; i < len; i++)

			{

				if (tempDecryptKey[i] != 0)

				{

					break;

				}

			}

			byte[] key = new byte[len - i];

			System.arraycopy(tempDecryptKey, i, key, 0, len - i);

			

			server.SetBlowFish(new NewCrypt(key));

			if (Config.DEBUG)

			{

				_log.info("New BlowFish key received, Blowfih Engine initialized:");

			}

			server.setLoginConnectionState(GameServerState.BF_CONNECTED);

		}

		catch (GeneralSecurityException e)

		{

			_log.log(Level.SEVERE, "Error While decrypting blowfish key (RSA): " + e.getMessage(), e);

		}

	}

}