Sonicomi(*.npk)

[happyend]

Thanks in advance
Samples：
http://www45.zippyshare.com/v/nlo1m9vQ/file.html

[Ekey]

Encrypted with AES/256/CBC + Vector (IV) from archive. File datas chunked, encrypted and compressed (deflate)

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static unsigned char m_Key[32] = {
       0x65, 0xAB, 0xB4, 0xA8, 0xCD, 0xE0, 0xC8, 0x10, 0xBB, 0x4A, 0x26, 0x72, 0x37, 0x54, 0xC3, 0xA7,
       0xE4, 0x3D, 0xE9, 0xEA, 0x7F, 0x5B, 0xB8, 0x43, 0x50, 0x1D, 0x05, 0xAB, 0xCF, 0x08, 0xD9, 0xC1};

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struct NPKHeader
{
   uint32_t   dwID; //Always NPK2
   uint32_t   dwFlag; //1 = Encrypted ?
   uint8_t    m_Vector[16]; //AES Vector (IV)
   uint32_t   dwTotalFiles;
   uint32_t   dwTableSize;
};

[aluigi]

A couple of things to fix (read header of the script):
http://aluigi.org/bms/sonicomi.bms

[Ekey]

Maybe this 32 bytes is key for decrypt file data?

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    getdstring IV 16 MEMORY_FILE2   # ???
    getdstring HASH 16 MEMORY_FILE2 # ???

[aluigi]

Eh no, the key is right or the whole file is garbage.

[Ekey]

Well key and vector from header are correct for decrypt file data.

[aluigi]

Everything is correct except the first 16 bytes of the extracted files.

[BlueBird]

I keep getting an error every time:


Btw, arc_unpacker just added Sonicomi support, and I can confirm it works:
https://github.com/vn-tools/arc_unpacker

You may want to look at the source code to see if it helps you correct the problems with sonicomi.bms, especially this part:
https://github.com/vn-tools/arc_unpacker/tree/master/src/dec/nitroplus

I'd do it myself, but I'm not very savvy on QuickBMS scripts or compression and encryption algorithms

But I would find it a huge help if the problems with the script were solved, as arc_unpacker can't be used to pack files, and the game doesn't support loading unpacked files.

[Ekey]

I guess that script not valid for reimport files back.

[BlueBird]

I actually get an error both when unpacking and reimporting. Does the former work for you? If so, I must be doing something wrong. Do you have to use the command line in this case? Because I've been using the GUI.

[Ekey]

I actually get an error both when unpacking and reimporting.

Currently, this script does not work

If so, I must be doing something wrong. Do you have to use the command line in this case? Because I've been using the GUI.

A couple of things to fix (read header of the script)

[BlueBird]

Oh ok, just checking

[aluigi]

The problem with the bytes of the extracted files was my fault.
Script 0.2 works perfectly but needs quickbms 0.7.5 which is not available yet.

[BlueBird]

I see, so it's just a matter of waiting now.

Thank you for your efforts, and same goes for Ekey

[aluigi]

That arc_unpacker supports many formats, would be interesting to have quickbms scripts for every format supported there.
Anyone interested in doing this huge conversion work?

[Ekey]

Game Extractor supported over 1000 formats. Do you want doing this huge conversion work?

[aluigi]

I already checked it and it does NOT support 1000 formats.
It supports maybe 1000 games where most of them use just ZIP or the same format.
Additionally they are all old games for which already exist a script (xentax_cs on my website) or other solutions.
Anyway it's a good challenge

[happyend]

Wait QuickBMS 0.75 release，thx aluigi&Ekey

[Methanol]

So after upgrading QuickBMS this works fine for sound.npk, but has the same error trying to extract font.npk and 3d.npk.

Here's what extracting 3d.npk looks like (tries only 1 file):


Sine 3d.npk is too big but font.npk has a similar issue, I give font.npk as a sample:
http://www100.zippyshare.com/v/fX0le6wc/file.html

[aluigi]

I'm checking it but in the meantime I highly suggest you to use arc_unpacker that works with that file:
https://github.com/vn-tools/arc_unpacker (I used the latest nighly build)

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arc_unpacker.exe --dec=nitroplus/npk2 --plugin=sonicomi font.npk