XeNTaX

Hey everyone,
So more or less recently, MiHoyo started to encrypt the unity 3d assets and textures for Honkai Imapct.
For some reason they have a ".wmv" extension. They come in 186 "blocks" about 50 mb each, and there is also a "BlockMeta.xmf" and "Blocks.xmf" file contained in the Asb folder (probably for indexing?).

Of course i already tried the basic programs like AssedStudio to try and extract these, but without success

I included 1 of the blocks and the 2 index files (probably?).
https://mega.nz/file/P0ZnDY6b#TIFRgD9B- ... HDNA4ap280

I would really appreciate it if someone could have a look an check if there is a way to extract these 3d models or textures.

Can't help with the encryption but you can use this BMS script to unpack the unity3d assets from the wmf container. Pick the "Blocks.xmf" file or anything as input as the script'll open it automatically. Just make sure the wmv files reside in the same path.

Hello

Thanks alot for your help!
Unfortounately i get an error when using the script, i attached the screenshot. I will see if i can solve it myself. I will edit if i manage to fix it.

Figured it out, it was probably just some reference error, i deleted the open "block.xmf" part and selected it manually and it worked

toastyengineer wrote: ↑Tue May 19, 2020 7:36 pm Unfortounately i get an error when using the script, i attached the screenshot.

I see. Was misplacing the parameters of "open" at final step but without testing. Sorry about that.
Script updated at the same post.

toastyengineer wrote: ↑Tue May 19, 2020 7:47 pm Figured it out, it was probably just some reference error, i deleted the open "block.xmf" part and selected it manually and it worked

Anything on the decyption though?. I got no luck finding anything about that.

It seems to be a UnityFS archive. Tried to use different tools but, but it did not work. That's all i found out so far

I have here a file example , perhaps some with more knowledge can help.
Link https://mega.nz/file/RoNwnARD#6mDO_0138 ... vlMt3k3vdk

If anyone can give a hand with the unity FSachive thing would be highly apreciated. Google seems to not be of use since it gives me only the wrong results of what i search .

There was an anonymous reply that linked a certain chinese blog about this, but the reply was removed for unknown reason.
Since I'm not sure if it was directly related to the blog I'll post the link to it again: https://blog.palug.cn/. I don't understand what's going on in his "analysis", but it's at least something.

Thanks for the link to the Forum, it has quite a bit of information and decryption keys.
If you go to the post about Honkai impact 3.8.0 you can find a download link to a Honkai Impact 3.5.0 Archive from the PC version.
I think he also said he will maybe upload 4.0.0 archive when 4.1.0 is released.

Yes I know that, and he has already posted 4.0 a while ago. The problem stands tho: how to decrypt those files ourselves? I want to get some data from files that are not part of the game bundle but downloaded from the CDN, for example.

4.0 (and any up to 4.3) still use a block.xmf file, they are decrypted into unity3d files, there should be a unity3d extractor for quickbms

Didn't want to start a new thread, but I have a different file from the same game that uses a different encryption (uploaded: https://bpnet.work/files/RandomDialogData_en.bytes). I'm certain it contains game dialogue text data, but how it was encrypted is a total mystery (I even asked the author of the aforementioned blog, he has no idea either). If the file makes you ring any bell, please don't hesitate to share your ideas.

The link from the Chinese blog actually works, it can decrypt both the Android and PC versions (up to date):

That image above is the model of Asuka from the current collaboration of Honkai with Evangelion:



the blog actually has some info on how the decryption was found but I can't read code or Chinese for that matter

Btw, the official Honkai website has an interactive 3D model of Asuka it seems:

https://honkaiimpact3.mihoyo.com/global/en-us/fab

I wonder if it can be grabbed and converted