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Drawing, posted Thu Jan 06, 2022 11:22 am (68735)

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Hi guys,

Name: Chimeraland / FancyWorld
Download: https://apkcombo.com/it/chimeraland/com ... ancyworld/

Recently tencent released this stunning mobile game.

However .obb files cannot be extracted.

Here header of main.obb :



Can anyone take a look?

Greetings,
Drawing

aluigi, posted Thu Jan 06, 2022 11:52 am (68737)

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There is a script on my website for the PPkg1.0 format, can you check it?
http://aluigi.org/bms/seek_fairy.bms

Drawing, posted Thu Jan 06, 2022 12:33 pm (68739)

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aluigi wrote:

There is a script on my website for the PPkg1.0 format, can you check it?
http://aluigi.org/bms/seek_fairy.bms

script doesn t seem to work

aluigi, posted Thu Jan 06, 2022 3:36 pm (68745)

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Can you upload the first few megabytes of the OBB? (because that APK is almost 4Gb)
Maybe you can use the filecutter script for generating the files we need:
http://aluigi.org/bms/filecutter.bms

Drawing, posted Thu Jan 06, 2022 4:01 pm (68751)

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Here you are cutted main.obb and patch.obb

https://www.mediafire.com/file/8eem51ylsv996fm/sample.rar/file

aluigi, posted Thu Jan 06, 2022 4:45 pm (68755)

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Ok, I adapted the script to this slightly different version:
http://aluigi.org/bms/chimeraland.bms

Please let me know if quickbms gives you any error, a screenshot or copy&paste of the error will help me to fix it

Drawing, posted Thu Jan 06, 2022 6:21 pm (68771)

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aluigi wrote:

Ok, I adapted the script to this slightly different version:
http://aluigi.org/bms/chimeraland.bms

Please let me know if quickbms gives you any error, a screenshot or copy&paste of the error will help me to fix it

It shows error, however patch.obb was almost completely extracted.

aluigi, posted Thu Jan 06, 2022 6:47 pm (68776)

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The first error is caused by a non-compressed file, I can fix it easily.
But the second one is a problem because it seems encrypted, additionally the field that I thought was related to compression here is zero instead of 2 while the data is compressed because compressed and uncompressed size are indeed different.
Also the flag is 0x100 like all the other files.
In short I don't have any way to recognize if this file is encrypted/invalid or not, luckily it's just the last file so "who cares"

Anyway I updated the script by checking if that field is 0, 1 or 2 and, long story short, it can dump ("as-is") also the last weird file of the patch archive.

Drawing, posted Fri Jan 07, 2022 11:31 am (68794)

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Thanks a lot aluigi

RegistA34, posted Wed Jul 20, 2022 6:35 am (72668)

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Hi ALuigi, wanted to thank you so much for developing the BMS utility and also the scripts. I was wondering if you could post the updated script that you talked about it in this thread. It seems the script currently doesn't handle the flag index of "3" which I can tell you from looking at the offsets where the script stops that they are OGG files. I can post some of the data from the .obb file so you could see what the data/header looks like. Would it be possible for you to update the script so that it saves these files that have the "3" flag as .ogg files? Thanks again!

Edit: Gotta love when issues just work themselves out

After reading the documentation a bit I ended up trying to add the following lines into the chimeraland.bms script which worked to get all the .ogg files.

Code:

    elif ZIP == 3
        log "" OFFSET ZSIZE

If anyone is reading this and wants to modify their script, add these lines below the following ones:

Code:

    elif ZIP == 2
        # comtype zlib
        # clog "" OFFSET ZSIZE SIZE