Unreal Engine 4 Decryption Tool

[shazzla]

Maybe its ZLib?!

[hwang4]

I Don't think "xZlib" is the problem,I did many tests!

The parameters of "ue4dt" are the problem !

when i use ue4dt with default mode (without any parameters)
the game installs without any problem(no longer slowly installation) ! but the ratio of compression is less good (48.1gb ---------->34gb)!

with these parameters:

"UE4DT.exe" e -m1 -c1024m -b1024
i got , like i told previously a good compression ratio (48.1gb ---------->24.7gb) but a very very very long & slow installation!

maybe a better configuration of parameters could solve this !

thx !

[BLACKFIRE69]

Originally Posted by hwang4

I Don't think "xZlib" is the problem,I did many tests!

The parameters of "ue4dt" are the problem !

when i use ue4dt with default mode (without any parameters)
the game installs without any problem(no longer slowly installation) ! but the ratio of compression is less good (48.1gb ---------->34gb)!

with these parameters:

"UE4DT.exe" e -m1 -c1024m -b1024
i got , like i told previously a good compression ratio (48.1gb ---------->24.7gb) but a very very very long & slow installation!

maybe a better configuration of parameters could solve this !

thx !

maybe try it by changing the value of -c (-c512m, -c128m, ...).

[prince55]

Does anyone still have UE4DT v5 ?
I need it

[Cesar82]

@Razor12911
Could you create a version for us to use this way (key as a parameter)?

Arc.ini
[External compressor:ue4dt]
header    = 0
packcmd   = ue4dt.exe e -m2 {options} <stdin> <stdout>
unpackcmd = ue4dt.exe d -m2 {options} <stdin> <stdout>

Pack.bat
arc.exe a -ep1 -r -ed -s; -w.\temp -mue4dt:0x5DD20432F2AD810071033FC3F925FFDFD647514524D0A0D222E17D76BAF57BFD+lzma:ultra data.arc "pack\*"

It would be great if we had that possibility.
In this way we could send the key from a .bat file (like DiskSpan.bat currently used together with CIU).

[Masquerade]

@Cesar92

I had a similar idea, however {option} will still translate any given value into a command line switch.

So, ue4dt must accept this command line:

ue4dt.exe e -m2 key <stdin> <stdout>

If you used {option}, a - will be appended to the key, making the run command:

ue4dt.exe e -m2 -key <stdin> <stdout>

leading to an error.

[KaktoR]

A really good idea!

This way you can copy&paste the key directly on cmd line instead of going to arc.ini and search for it

[Cesar82]

After reading the information in Razor12911 posts better.
I realized that it would also be necessary to set the parameter -m [1/2], so that through the .bat file it is possible to send the type.

It may not be possible to implement this, but it would be good.
But the normal mode could not be removed because for extraction it would be necessary to use the current mode using SetIniString for the decompression to be done using IsDone.

Maybe something that lets you use it like this:

ue4dt.exe e -m -key <stdin> <stdout>

arc.exe a -ep1 -r -ed -s; -w.\temp -mue4dt:2:0x5DD20432F2AD810071033FC3F925FFDFD647514524D0A0D222E17D76BAF57BFD+lzma:ultra data.arc "pack\*"

[Razor12911]

Update available

Changes

- As requested, added -k parameter so you can set key directly when using Freearc.

[External compressor:ue4dt]
header    = 0
packcmd   = ue4dt.exe e {options} <stdin> <stdout>
unpackcmd = ue4dt.exe d {options} <stdin> <stdout>

-mue4dt:m2:k0x5DD20432F2AD810071033FC3F925FFDFD647514524D0A0D222E17D76BAF57BFD

[Masquerade]

What is the purpose of -m switch?

[Razor12911]

https://fileforums.com/showpost.php?...1&postcount=52

-m = method (1 = games that use borderlands3, street figher v... format, 2 = games that use rune ii format)

[Masquerade]

Originally Posted by Razor12911

https://fileforums.com/showpost.php?...1&postcount=52

-m = method (1 = games that use borderlands3, street figher v... format, 2 = games that use rune ii format)

How do we tell the difference between the 2 formats? By inspection of the game files in either sides, is m1 for pak chunks and m2 for single paks?

[KaktoR]

For some reason I can't use the new version with k parameter. cmd process doesn't go above 0.3% (ue4dt.exe has a cpu load at 9.9%), it just like stucks there forever.

I tested on BL3.

The old version of ue4dt works fine (with key inside arc.ini).

[Masquerade]

Originally Posted by KaktoR

For some reason I can't use the new version with k parameter. cmd process doesn't go above 0.3%

Same here, I tried on Xuan Yuan yesterday.

I thought this morning it was because I forgot to specify an -m switch - did you do this?

[FitGirl]

Originally Posted by Masquerade

Same here, I tried on Xuan Yuan yesterday.

I thought this morning it was because I forgot to specify an -m switch - did you do this?

Why? Only TOC is encrypted in final version, unlike in demo.