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  #1  
Old 07-11-2019, 10:16
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Unreal Engine 4 Decryption Tool

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.
Attached Files
File Type: 7z ue4dt_R8.7z (1.15 MB, 255 views)

Last edited by Razor12911; 08-01-2021 at 20:28.
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  #2  
Old 07-11-2019, 10:21
ShivShubh ShivShubh is offline
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And the legend is back ...
Key for Borderlands 3:
Code:
0x115EE4F8C625C792F37A503308048E79726E512F0BF8D2AD7C4C87BC5947CBA7
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  #3  
Old 07-11-2019, 10:49
ZAZA4EVER ZAZA4EVER is offline
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Welcome Back My Bro
You Do it
Thanks , i will test it
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Old 07-11-2019, 12:30
PSP17 PSP17 is offline
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Awesome, hope we will see the same for RDR2 files
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Old 07-11-2019, 15:21
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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

Last edited by Razor12911; 07-11-2019 at 15:35.
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  #6  
Old 08-11-2019, 11:01
FitGirl FitGirl is offline
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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
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  #7  
Old 08-11-2019, 15:06
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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 View Post
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.

Last edited by Razor12911; 08-11-2019 at 15:09.
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  #8  
Old 14-11-2019, 15:31
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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
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Old 14-11-2019, 23:10
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Quote:
Originally Posted by darkwolves View Post
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
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Old 14-11-2019, 23:26
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Quote:
Originally Posted by dixen View Post
Same thing
it crashes on use of aes key
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Old 15-11-2019, 00:42
DiCaPrIo DiCaPrIo is offline
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should it work on t7
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Old 15-11-2019, 00:45
DiCaPrIo DiCaPrIo is offline
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Quote:
Originally Posted by darkwolves View Post
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
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  #13  
Old 15-11-2019, 04:17
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Quote:
Originally Posted by DiCaPrIo View Post
that is the key i have and i have tried those tools
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Old 15-11-2019, 06:53
ShivShubh ShivShubh is offline
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Quote:
Originally Posted by darkwolves View Post
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.
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  #15  
Old 15-11-2019, 15:58
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Quote:
Originally Posted by ShivShubh View Post
Use this:
Code:
0x5f6153346d665a4b384d3573354b5743324c7a325673466e474b4937617a676c
If it doesn't works then use in all caps.
trying that now
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