Change client version/encryption via C# - RunUO

Arcer · 10-01-2007, 07:10 AM

I all i'am coding a launcher for my shard in C#, the launcher must change encryption key or/and it must spoof version string sended to server (like razor or injection) My goal is to accept only players logged with my launcher....

I see VerChanger by omegared but i can't understand how it pass key encryption to the client and how it change the version of the client

excuse me for my english

thanks a lot

**Jeff** · 10-01-2007, 04:56 PM

I doubt this can be done in C#, perhaps try C++. I can't really help you any further other then telling you its done in C++ for ConnectUO and Razor.

Arcer · 10-01-2007, 05:21 PM

Quote:

Originally Posted by Jeff

I doubt this can be done in C#, perhaps try C++. I can't really help you any further other then telling you its done in C++ for ConnectUO and Razor.

ok also in C++ i can develop the launcher

Can i change the encryption keys of the packets transmitted and received by the client?

**Jeff** · 10-02-2007, 12:30 AM

Quote:

Originally Posted by Arcer

ok also in C++ i can develop the launcher

Can i change the encryption keys of the packets transmitted and received by the client?

Yes, you have to decrypt and encrypt the data sent from and to the client on the fly.

Arcer · 10-02-2007, 06:51 AM

Quote:

Originally Posted by Jeff

Yes, you have to decrypt and encrypt the data sent from and to the client on the fly.

clear

....but my question is how can I sniff packet ?....the algorithm is blo/two fish so the implementation is not very difficult beacouse it can be found over the internet.....so the idea is

SEND:
CLIENT---->SNIFF(decrypt(whit standard key of client) & encrypt(my own key))---->SERVER

RECEIVE:
SERVER---->Sniff(decript(with my own keys) & encrypt(with standard key))---->CLIENT

Ravatar · 10-24-2007, 12:54 AM

Quote:

Originally Posted by Arcer

clear

....but my question is how can I sniff packet ?....the algorithm is blo/two fish so the implementation is not very difficult beacouse it can be found over the internet.....so the idea is

SEND:
CLIENT---->SNIFF(decrypt(whit standard key of client) & encrypt(my own key))---->SERVER

RECEIVE:
SERVER---->Sniff(decript(with my own keys) & encrypt(with standard key))---->CLIENT

This can be done easily using the Win32 debugging API, check out SpyUO for a fantastic example of hooking packets on the fly.

10-01-2007, 07:10 AM	#1 (permalink)
Arcer Lurker Join Date: Jun 2006 Age: 22 Posts: 4	Change client version/encryption via C# I all i'am coding a launcher for my shard in C#, the launcher must change encryption key or/and it must spoof version string sended to server (like razor or injection) My goal is to accept only players logged with my launcher.... I see VerChanger by omegared but i can't understand how it pass key encryption to the client and how it change the version of the client excuse me for my english thanks a lot

10-01-2007, 04:56 PM	#2 (permalink)
Jeff ConnectUO Creator Join Date: Jan 2004 Location: In your mom Age: 27 Posts: 4,763	I doubt this can be done in C#, perhaps try C++. I can't really help you any further other then telling you its done in C++ for ConnectUO and Razor. __________________ Jeff Boulanger ConnectUO - Core Developer Want to help make ConnectUO better? Click here to submit your ideas/requests Use your talent to compete against other community members in RunUO hosted coding competitions If you know XNA (even if its just a little) or are a good artist(2d or 3d) and are interested in making games for a hobby send me a pm or drop by #xna in irc.runuo.com. I'm looking to put together a small game development team. Please do not pm me for support. If you are having issues please post in the appropriate forum. Thanks for your continued support of both ConnectUO and RunUO

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