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-   -   Unreal Engine 4 Decryption Tool (https://fileforums.com/showthread.php?t=103145)

Razor12911 07-11-2019 10:16

Unreal Engine 4 Decryption Tool
 
1 Attachment(s)
Usage:
Code:

ue4dt.exe e|d -m# -c# -b# -k# <stdin> <stdout>
Code:

-m = method (1 = games that use borderlands3, street figher v... format, 2 = games that use rune ii format)
-c = chunk size
-b = block count
-k = key in hexadecimal.

The key must be in hexadecimal format. Other key formats will not work because there is currently no parser for them yet.

I am not sure if this is universal, I don't have any unreal engine games and I was sent a small sample to work on. Borderlands 3 "pakchunk2-WindowsNoEditor_0_P.pak", seems like it works

Note: This only decrypts, you'll have to find other means of precompressing the data. The input/output size remains the same.

ShivShubh 07-11-2019 10:21

And the legend is back ... :)
Key for Borderlands 3:
Code:

0x115EE4F8C625C792F37A503308048E79726E512F0BF8D2AD7C4C87BC5947CBA7

ZAZA4EVER 07-11-2019 10:49

Welcome Back My Bro
You Do it
Thanks , i will test it

PSP17 07-11-2019 12:30

Awesome, hope we will see the same for RDR2 files :)

Razor12911 07-11-2019 15:21

Update available

Changes

- Replaced old SHA and AES functions for more optimized ones

Notes

- This is backwards compatible with first release, it's just faster

FitGirl 08-11-2019 11:01

Thanks for the tool, works OK for BL3. Is it possible to reduce the buffer size? Now it eats >256 MB of RAM on relatively small files? Combined with main algo, srep and xtool it can easily kill all the RAM :)

Razor12911 08-11-2019 15:06

Update available

Changes

- Fixed minor issues, thanks ShivShubh
- Added chunk size option as requested, its setting is optional

Notes

- This thing does not work like xtool where setting small/big chunk size has little to no difference, if an encrypted stream is truncated, it will not be decrypted
- Make sure the chunk size you use when encoding is the same as the one you set when decoding
- You may also have noticed, the key and chunk size are repeated when encoding and when decoding (the command line), that is because this tool does not store headers of its own to recall this information, which is why I did mention that the input/output size is always the same
- You can input a different key if you plan on reencrypting the data using another key, not sure why you would be doing that though but it is possible :)

Usage
Code:

ue4dt.exe e|d[chunksize] key <stdin> <stdout>
Quote:

Originally Posted by PSP17 (Post 483381)
Awesome, hope we will see the same for RDR2 files :)

I'm just waiting for the key, I already have plans on how to precompress that game.

darkwolves 14-11-2019 15:31

anyone have the decryption key for street fighter 5?
i have the aes_binary one but when i go to pack it back up it doesn't work right

dixen 14-11-2019 23:10

Quote:

Originally Posted by darkwolves (Post 483445)
anyone have the decryption key for street fighter 5?
i have the aes_binary one but when i go to pack it back up it doesn't work right

Same thing

darkwolves 14-11-2019 23:26

Quote:

Originally Posted by dixen (Post 483447)
Same thing

it crashes on use of aes key

DiCaPrIo 15-11-2019 00:42

should it work on t7

DiCaPrIo 15-11-2019 00:45

Quote:

Originally Posted by darkwolves (Post 483445)
anyone have the decryption key for street fighter 5?
i have the aes_binary one but when i go to pack it back up it doesn't work right

https://forum.xentax.com/viewtopic.php?t=13982

darkwolves 15-11-2019 04:17

Quote:

Originally Posted by DiCaPrIo (Post 483450)

that is the key i have and i have tried those tools

ShivShubh 15-11-2019 06:53

Quote:

Originally Posted by darkwolves (Post 483453)
that is the key i have and i have tried those tools

Use this:
Code:

0x5f6153346d665a4b384d3573354b5743324c7a325673466e474b4937617a676c
If it doesn't works then use in all caps.

darkwolves 15-11-2019 15:58

Quote:

Originally Posted by ShivShubh (Post 483457)
Use this:
Code:

0x5f6153346d665a4b384d3573354b5743324c7a325673466e474b4937617a676c
If it doesn't works then use in all caps.

trying that now


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