XBox System Link Protocol

daeken · Post by **daeken** » Tue Jan 27, 2004 9:30 am

Hello,

A friend and I have been working on a cross-platform, open source system-link tunnel, primarily for playing Halo. Now that that's done, we're working on a peer for this tunnel that will add bots to the system link multiplayer. The problem is that we do not have enough information on the crypto used to really get anywhere as of yet... once that is done, RE'ing the protocol itself is very simple.

If anyone has any information on this, it'd be greatly appreciated.

Happy Hacking,
Lord Daeken M. BlackBlade
(Cody Brocious)

WaLKa · Post by **WaLKa** » Tue Jan 27, 2004 6:14 pm

you should probably ask the guys down at www.xbconnect.com they got it figured out.
Nice first name btw, same as mine

daeken · Post by **daeken** » Tue Jan 27, 2004 6:20 pm

First, thanks for the quick reply

Second, we figured out the tunneling protocol in about 10 minutes of looking at packet dumps, and have a working cross-platform tunnel that we'll be releasing ASAP

Third, I am almost certain I figured out the crypto system-link games use... it seems to be DES-56 using the MAC address and then the last two bytes of the MAC address as the key... hats off to MS on this extremely.... complex... cryptography system... they should've gone with a caesarian cipher... at least then it wouldn't have been so damn predictable

Later

WaLKa · Post by **WaLKa** » Tue Jan 27, 2004 6:24 pm

glad you got it working

Guest · Post by **Guest** » Wed Jan 28, 2004 9:01 am

stop using big words!

mtxboxfreak · Post by **mtxboxfreak** » Thu Feb 12, 2004 9:19 am

hey sounds cool, by "cross-platform" u mean xbox to xbox or xbox to pc or pal to ntsc?
But playing bots on xbox sounds cool. think of the other possibilities!