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godskin, posted Tue May 28, 2019 12:50 pm (48077)

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need unpack .npk here file

https://drive.google.com/open?id=1DVYvA ... m5ssin5dQy

crackofdawn, posted Tue May 28, 2019 3:32 pm (48079)

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Hi all!

Pretty new to this world, but I've spent some time familiarizing myself with the quickbms tool and its script. I tried running the nxpk.bms script on a set of .npk files and I'm getting the following error:

"Signature of 4 bytes at offset 0x00000000 doesn't match the one expected by the script:
this one: "EXPK"
45 58 50 4b EXPK
expected: "NXPK"
4e 58 50 4b NXPK

- 0 files found in 0 seconds
coverage file 0 0% 4 38568664 . offset 00000004"

It seems like encryption is off by one digit (5 vs e). I was wondering if there was anything that could be done to get around this encryption? Any guidance would be much appreciated.

I've attached one of the smaller files of the bunch. I had to add it to a .rar since .npk files cannot be uploaded here.


Cheers!

aluigi, posted Tue May 28, 2019 7:12 pm (48083)

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I suspect it's some sort of compression because the 32bit field at offset 0x14 looks like a decompressed size.
The data is 0x370354 bytes while that field is 0x370194, additionally the consecutive zeroes at the end of the data don't match with a possible encryption since it should be just garbage.

Currently I don't know what compression algorithm it may be.

crackofdawn, posted Tue May 28, 2019 8:54 pm (48087)

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Thanks for giving it a go! It's a game that just came out, maybe it's some fancy new algorithm! Who am I kidding, I don't know anything about this stuff ^.^ Have a great week!

aluigi, posted Sat Jun 01, 2019 11:35 pm (48290)

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@godskin
I have merged your previous topic in this one because this is another EXPK format.
I preferred to keep them in the same topic.