l2j-server-game/L2_GameServer/java/com/l2jserver/gameserver/network/clientpackets/GameGuardReply.java

/*
 * 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.l2jserver.gameserver.network.clientpackets;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.l2jserver.gameserver.network.L2GameClient;


/**
 * Format: c dddd
 *
 * @author  KenM
 */
public class GameGuardReply extends L2GameClientPacket
{
	protected static final Logger _log = Logger.getLogger(GameGuardReply.class.getName());
	private static final String _C__CA_GAMEGUARDREPLY = "[C] CA GameGuardReply";
	
	private static final byte[] VALID =
	{
		(byte) 0x88, 0x40, 0x1c, (byte) 0xa7, (byte) 0x83, 0x42, (byte) 0xe9, 0x15,
		(byte) 0xde, (byte) 0xc3, 0x68, (byte) 0xf6, 0x2d, 0x23, (byte) 0xf1, 0x3f,
		(byte) 0xee, 0x68, 0x5b, (byte) 0xc5,
	};
	
	private byte[] _reply = new byte[8];
	
	@Override
	protected void readImpl()
	{
		readB(_reply, 0, 4);
		readD();
		readB(_reply, 4, 4);
	}
	
	@Override
	protected void runImpl()
	{
		L2GameClient client = this.getClient();
		try
		{
			MessageDigest md = MessageDigest.getInstance( "SHA" );
			byte[] result = md.digest(_reply);
			if (Arrays.equals(result, VALID))
			{
				client.setGameGuardOk(true);
			}
		}
		catch (NoSuchAlgorithmException e)
		{
			_log.log(Level.WARNING, "", e);
		}
	}
	
	@Override
	public String getType()
	{
		return _C__CA_GAMEGUARDREPLY;
	}
	
	@Override
	protected boolean triggersOnActionRequest()
	{
		return false;
	}
}