Question about how to obtain decryption key for UE4 title.

[L33THAK0R]

Originally Posted by Joe Forster/STA

According to this utility: UnrealPak, Chernobylite's files are not encrypted, only compressed (with ZLib). I could list and extract the contents of any of the PAK's. If I understand correctly, you have to specify the AES key in the "Crypto.json" file of this utility to be able to decrypt files; if the PAK "index" is also encrypted, you won't even be able to list the files inside without the proper key. So I think AES finder was right: there's no key in this game.

This also means that you won't be able to significantly compress the game as it is further because it's already compressed, unless you extract everything from all the PAK's. [...] I tried it: Chernobylite works fine it this unpacked form - I could load the last savegame in the base and start a mission - and the (unpacked) files don't seem to be encrypted. (You can't compress encrypted files much anyway.) I extracted the PAK's in this order: 0, 1, 3, 3optional, ..., 9, 10, ..., 15. About 124 thousand files, 40.6 gigabytes. The "ChernobylGame" and "Engine" directories extracted from the PAK's go to the root directory of the game, all other directories go under "ChernobylGame\Content".

Can you confirm that you cannot list of extract files from "Samurai Jack - Battle Through Time" with the same utility? Without explicitly specifying the AES key, that is.

Attempted to Extract the .pak (only 1 exists) for Samurai Jack, can confirm a key is required. When inputting a key (using BMS script) extraction is successful. Thank you so much for your help man!