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Notes: This doesn't actually work yet i am just sharing the results of my experiments so others can try. I have never really tried emulating a GG server before but people who have done other pservers may have more experience than me and might be able to see where i am going wrong.
Do not complain at me and ask for help to make it work as if i could do that this would be a working release.
For testing i used a current EU client which is probably why it doesn't work, but more about this later.
How GG does it's updates
The client has a CabalOnlineUK.ini, which is encrypted, and this controls where the client will update GG from. These can be decrypted with the gguardfile utility. These examples are from the official EU GG server earlier this month.
So, the client gets it's updates from hxxp://gameguard.cabalonline.com/gameguard/nProtect/GameGuard/RealServer/ and once we know that we can set up a webserver with the same directory structure. You will need to redirect gameguard.cabalonline.com to you own webserver using either DNS records or the hosts file.
The first thing GG does is download the update.cfg file so it know what it needs to update. This is encrypted in the same way as the ini file from the client.
Now these 2 files are encrypted using a shared key method from what i have read which largely means decrypting is quite easy, encrypting is almost impossible unless we have the private key too (which we don't). This means that for this to work we need an update.cfg and a set of matching GG files as it is checking the crc.
If i set this up, enable GG on the server and try logging in with my pserver client i get booted right away which is exactly what we want, only protected and verified exes allowed. If i try with the EU client (using the batch file and internal.txt obviously) i can get past login but i get booted around the char select screen.
Our servers only have GG libs up to v52 and i know what GG goes higher than this. As our server version is quite old the official one has obviously updated to a newer version of GG which i am pretty sure is the reason i get booted as the server GG lib is too old for the current GG files used by official.
The real problem is how to get older Cabal GG files. Getting the files themselves is no real problem but without the matching update.cfg the files are useless. A better method would be to find an updated lib (libggauth2.so.xx) for the server so we can use the current GG version rather than older exploitable ones.
One other possible solution is to use older update.cfg and GG files from another game as. GG is definitely going to check the game name in the cfg and ini matches but i don't know if the client also verifies this. I don't have any other GG files from other games to test with but maybe somebody else does.
Here are the GG files, decrypted ini/cfg and a copy of gguardfile. Hopefully there are some GG experts out there that can prove my noobness to everybody
Do not complain at me and ask for help to make it work as if i could do that this would be a working release.
For testing i used a current EU client which is probably why it doesn't work, but more about this later.
How GG does it's updates
The client has a CabalOnlineUK.ini, which is encrypted, and this controls where the client will update GG from. These can be decrypted with the gguardfile utility. These examples are from the official EU GG server earlier this month.
CabalOnlineUK.ini said:
So, the client gets it's updates from hxxp://gameguard.cabalonline.com/gameguard/nProtect/GameGuard/RealServer/ and once we know that we can set up a webserver with the same directory structure. You will need to redirect gameguard.cabalonline.com to you own webserver using either DNS records or the hosts file.
The first thing GG does is download the update.cfg file so it know what it needs to update. This is encrypted in the same way as the ini file from the client.
update.cfg said:
Now these 2 files are encrypted using a shared key method from what i have read which largely means decrypting is quite easy, encrypting is almost impossible unless we have the private key too (which we don't). This means that for this to work we need an update.cfg and a set of matching GG files as it is checking the crc.
If i set this up, enable GG on the server and try logging in with my pserver client i get booted right away which is exactly what we want, only protected and verified exes allowed. If i try with the EU client (using the batch file and internal.txt obviously) i can get past login but i get booted around the char select screen.
Our servers only have GG libs up to v52 and i know what GG goes higher than this. As our server version is quite old the official one has obviously updated to a newer version of GG which i am pretty sure is the reason i get booted as the server GG lib is too old for the current GG files used by official.
The real problem is how to get older Cabal GG files. Getting the files themselves is no real problem but without the matching update.cfg the files are useless. A better method would be to find an updated lib (libggauth2.so.xx) for the server so we can use the current GG version rather than older exploitable ones.
One other possible solution is to use older update.cfg and GG files from another game as. GG is definitely going to check the game name in the cfg and ini matches but i don't know if the client also verifies this. I don't have any other GG files from other games to test with but maybe somebody else does.
Here are the GG files, decrypted ini/cfg and a copy of gguardfile. Hopefully there are some GG experts out there that can prove my noobness to everybody
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GameGuard error codes said:
im sure you'll get it work eventually!
we can try with this 
