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 com.l2jserver.gameserver.network.L2GameClient;


/**
 * Format: c dddd
 *
 * @author  KenM
 */
public class GameGuardReply extends L2GameClientPacket
{
    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)
        {
            e.printStackTrace();
        }
    }

    @Override
	public String getType()
    {
        return _C__CA_GAMEGUARDREPLY;
    }

    @Override
	protected boolean triggersOnActionRequest()
	{
		return false;
	}
}