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Author Topic: Ace Combat 7  (Read 1779 times)
JilKylefield
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Ace Combat 7
« on: February 02, 2019, 07:09 »

https://store.steampowered.com/app/502500

Description
"Become an ace pilot and soar through photorealistic skies with full 360 degree movement; down enemy aircraft and experience the thrill of engaging in realistic sorties! Aerial combat has never looked or felt better!
Project Aces aims to revolutionize the sky with this entry in the series, offering an experience so immersive it feels like you're piloting an actual aircraft! Weather and the environment affect your aircraft and the HUD, adding a sense of extreme realism never felt before in a flight combat game. Epic dogfights await!"

Game uses Unreal Engine 4.18 after a friend mine checked the binary, but no success of finding the AES.

Photos


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hooner
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Re: Ace Combat 7
« Reply #1 on: February 26, 2019, 00:02 »

Do any people/groups actively try to find out AESs, or is it simply if some one can be bothered?
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JilKylefield
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Re: Ace Combat 7
« Reply #2 on: March 14, 2019, 05:54 »

Update

User jgottula at Zenhax/Xentax found the key, aside of a trivia it is simply the URL in 0x AES key :
0x68747470733a2f2f616365372e616365636f6d6261742e6a702f737065636961


Tested in Umodel, but no success at importing assets, older versions of Umodel if you try to open the program will say the asset can't be open. using current version, it gives more details at CMD, 38 and 2 encrypted files from the log(image below), but opening the asset will say the file is encrypted. checking with QuickBMS and package save functions, the files have a additional layer of compression(and the file sizes are also very small), so in theory :

A)Fortine logic, that it depends of another AES keys for the files.

or

B)Tekken 7 Logic, which they used a additional encryption.

File Structure :


Umodel Current Version Log :


Umodel Error :



.Uasset :


.Uexp :


Once again, game runs at UE 4.18 at the binaries.
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Gildor
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Re: Ace Combat 7
« Reply #3 on: March 14, 2019, 10:05 »

It seems the AES key is wrong. It "decrypts" data to garbage.
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JilKylefield
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Re: Ace Combat 7
« Reply #4 on: March 15, 2019, 01:25 »

User jgottula checked more of the game in debugger, the following thread chain :
https://forum.xentax.com/viewtopic.php?f=10&t=19431&p=149578#p149573

The game itself it uses a external compression method for the UE4 assets, the .PAK itself uses only the key that was shared already, and the only additional AES key that exists is one for the save file of each account's game save.

My subsidiary uploaded samples of the two files, one for the A-10A featured in game, and other from Goku's model from DBFZ. my friend also checked Tekken 7 files using QuickBMS which you can extract them without AES key, they work like conventional .uassets by following the header and structure with directories, not so heavily compressed like the AC7 one :
https://www.dropbox.com/s/nxnpqygvd5ntnfi/a10aAC7.rar?dl=0
https://www.dropbox.com/s/bf67tt81ilptcsy/GKNDBFZ.rar?dl=0
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