The most straightforward program for finding the encryption key.
This application scans every byte of the executable file and tries to open the PCK file until it finds a suitable byte sequence - the Encryption Key.
Currently, only Godot 4 is supported.
On my processor from 2012, full processing a 56MB exe file takes about 4 minutes. But if you're lucky, the key may be located where the search will take a few seconds.
A more correct(?) solution is to look in memory/disassembler for the address where the encryption key is used to open the PCK, but I wanted to use this method because it does not depend on the versions of the engine and platform. And thanks to this program, I finally switched to dotnet, which accelerated the work of the application. And I also found stupid errors in GodotPCKExplorer, fixing which I managed to reduce the estimated time from 1:30:00 to 4:00.
In the future, it is possible to combine this solution and a more specific address search in the disassembler.
usage_example.mp4
This application can be downloaded from itch.io or compiled from source code yourself.