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Hi there,

i know there are plenty ways to unpack cpk files but i can't find informations about the format specifications ?
Has anybody documents about how the format is build up or how to unpack?

thanks

both the source code for quickbms and hcs64's cpkunpack are freely available. both have cpk unpack code. as far as i know no specification exists.

thanks for your reply.

I had already checked these scripts but had problems to understand whats going on.
I'am really surprised that there are no specification available for such a popular file format.

p.s. Is there a graphical debugger for bms scripts?

Riigel wrote:p.s. Is there a graphical debugger for bms scripts?

Don't think so. Sure you'll need one?

Just use debug option -v for quickbms.

This is an example output (not for cpk but dzip but shouldn't matter):
In bold the addresses of the archive being extracted.

offset filesize filename
------------------------------
.start_bms start: -1 0 0

00000000 09 1 idstring DZIP

00000004 19 2 comtype COMP_LZF

00000004 06 3 get unk01 long
>set unk01 (0) to 0x00000002

00000008 06 4 get files long
>set files (1) to 0x00000001

So you can see at which address which values to be filled into the vars of the script.

thank,
i will try the debug mode.

Just a quick Question to the syntax. (Can't find informations in the readme)
"set query->offset long 0"

Is "query->" somthing like a list in .Net?

You could (as a test) replace all the "query->" in the cpk.bms by "query_" and see whether the script will run correctly.

I guess it will.

The format itself is a little bit complicated to understand, but once you understand how everything works it's easy to write a tool for it,


This is my try to make a tool, it currently supports:
- decompress CRILAYLA
- decrypt UTF if UTF is encrypted
- read TOC, ITOC and ETOC tables
TODO:
- implement GTOC table
- some optimizations
- replace files
- relink files
- repack into cpk/create cpk from folder

It's written in C# and therefore easy to debug in visual studio.
Here source code + binary:
http://www.mediafire.com/download/xgx73 ... oolpack.7z

I check cpk and in it files have the same names and when unpacking they replace each other.
Only unpacker that work was CpkFileExplorer from https://github.com/esperknight/CriPakTools (Link go here)
Pls look and help me with it, because i try all tools that i find on internet already...
File: https://mega.nz/#!aldiwY4D!wgrYjIrFZsf4 ... ZFeXhdh4hc

both the source code for quickbms and hcs64's cpkunpack are freely available. both have cpk unpack code. as far as i know no specification exists.

todzy wrote:I check cpk and in it files have the same names and when unpacking they replace each other.
Only unpacker that work was CpkFileExplorer from https://github.com/esperknight/CriPakTools (Link go here)
Pls look and help me with it, because i try all tools that i find on internet already...
File: https://mega.nz/#!aldiwY4D!wgrYjIrFZsf4 ... ZFeXhdh4hc

Try this fork :https://github.com/wmltogether/CriPakTools/tree/mod
based on the scripts from falo & esperknight