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Help Decrypting a file

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asdasd123
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Help Decrypting a file

Post by asdasd123 »

Greetings!

I'm trying to access the 3D models of Saint Seiya APK, however the file is encrypted and their HEX code just shows __crypto__

I've searched through the DLLs and found the function that seems do Decrypt those files, but I don't know what the next step is.
Since I'm not a programmer, so I really don't know how to use that information to extract the models.

Can you guys help me out?

Encrypted file sample: http://www.mediafire.com/download/x66rc ... 491fc7.rar

Here's the decryption function:
Image

And here are the DLLs in case you want to take a deeper look: http://www.mediafire.com/download/kmteg ... x/DLLs.rar

Thanks in advance!
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atom0s
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Re: Help Decrypting a file

Post by atom0s »

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Last edited by atom0s on Fri Sep 15, 2017 9:36 am, edited 1 time in total.
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asdasd123
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Re: Help Decrypting a file

Post by asdasd123 »

@atom0s you are absolutely right!

I've found _nativeDecrypto function inside libarrow.so. I managed to disassemble it with IDA https://www.hex-rays.com/products/ida/
I believe the language IDA uses is called ARM (http://simplemachines.it/doc/arm_inst.pdf)

Just to be sure, I'm uploading all the .SO files here: http://www.mediafire.com/download/nr1q8 ... +files.rar

Here's the _nativeDecryptoToAssetBundle funcion:

Image
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