Thread: [PI] Anti-cheat client securities

Doing this, along with obfuscation makes it REALLY hard, if not impossible (Unless for beasts like graham, Galkon) for people to get on with cheat clients.


Client-sided

Code:

/**
*
* Cheat client packets, defined in  client.java.
* @author Arno
*
*
*/
public final class CheatPackets 

 {
    public static int packet1;
	public static int packet2;
	public static int packet3;
	public static int packet4;
	public static int packet5;
	public static int packet6;
	public static int packet7;
	public static int packet8;
	
 }

In public client():

Code:

CheatPackets.packet1 = ****;
CheatPackets.packet2 = ****;
CheatPackets.packet3 = ****;
CheatPackets.packet4 = ****;
CheatPackets.packet5 = ****;
CheatPackets.packet6 = ****;
CheatPackets.packet7 = ****;
CheatPackets.packet8 = ****;

Assign numbers.


Private void login:

Code:

	stream.writeDWord(CheatPackets.packet1);
				stream.writeDWord(CheatPackets.packet2);
				stream.writeDWord(CheatPackets.packet3);
				stream.writeDWord(CheatPackets.packet4);
				stream.writeDWord(CheatPackets.packet5);
				stream.writeDWord(CheatPackets.packet6);
				stream.writeDWord(CheatPackets.packet7);
				stream.writeDWord(CheatPackets.packet8);

Makes client send out data to server.

Code:

if (k == 22) //Good fight fucking cheaters. TTYL.
			{
				loginMessage1 = "Cheatclient detected!";
				loginMessage2 = "Please use the official Webclient/Client!";
				return;
			}

Making opcode, in case packets are NOT met.

Server-sided:

Code:

int packet1 = in.getInt();
						int packet2 = in.getInt();
						int packet3 = in.getInt();
						int packet4 = in.getInt();
						int packet5 = in.getInt();
						int packet6 = in.getInt();
						int packet7 = in.getInt();
						int packet8 = in.getInt();

And:

Code:

final int[] cheatPackets = {packet1, packet2, packet3, packet4, packet5, packet6, packet7, packet8};
		for (int i = 0; i < Config.CHEATPACKETS.length; i++)
		if (Config.CHEATPACKETS[i] != cheatPackets[i]) {
		returnCode = 22;
		}

Don't forget making packets load into load method. (twice).

Config reference:

Code:

	public static final int[] CHEATPACKETS = 
	/**P1****P2***P3***P4****P5***P6**P7**P8***/
	{****,****,****,****,****,****,****,****} ;

NOTE: This is written in a very unclear way, so people will have to spend time before actually implementing this.

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