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PostPosted: Mon Oct 12, 2015 3:11 pm 

Joined: Sat Sep 26, 2015 5:51 pm
Posts: 9
Hello,
i would really like to learn more about encryption/decryption keys like in Telltale games. Can *maybe* someone explain a bit how to find such a key ;) ?

Thanks in advance


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PostPosted: Thu Jun 16, 2016 5:31 pm 

Joined: Thu Aug 13, 2015 4:30 am
Posts: 7
Often the easiest way to find encryption/decryption keys is to locate the encryption/decryption routines by decompiling the game binary. You could also try using a debugger/memory editor to look in RAM while the game is running, but even then having the disassembly is probably necessary to know where you should be looking.


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PostPosted: Fri Jun 17, 2016 7:02 am 
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Joined: Sat Dec 27, 2014 8:49 pm
Posts: 92
Some other methods you can use to find the crypt functions easily is look for string references to paths where the files are located.
Also setting breakpoints on CreateFileA/CreateFileW/ReadFile/WriteFile etc. to attempt to find when the game accesses the encrypted files can lead you back to the functions of interest.

Doing static analysis in a disassembler like IDA makes things easier as well vs. debugging as you can trace around the file much faster.

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