Pit People music archive (.pak)

[loreberg]

Hey, I have problems accesing the data (music) in the following archive (from Pit People game):
http://www.megafileupload.com/803a/music.pak

Unfortunately, doing stuff reccomended for previous Behemoth games doesn't seem to work, Dragon unpacker and Hyperripper can't find anything. Pretty stuck here, hoped some extractions guru's from here could guide me on some way as I'm very inexperienced

[herbert3000]

Here's a QuickBMS script for extracting the .fsb files from music.pak:

Code: Select all

idstring "PKTB"
get DUMMY long	# maybe version
get FILE_COUNT long
get FILE_SECTION_OFFSET long
get STRING_SECTION_OFFSET long
get STRING_SECTION_LENGTH long
get DUMMY long	# 0
get DUMMY long	# 0

for i = 0 < FILE_COUNT
	xmath OFFSET "0x20 + i * 0x20"
	goto OFFSET
	
	get DUMMY long	# maybe checksum
	get FILE_OFFSET long
	get FILE_LENGTH long
	get DUMMY long	# always 0
	get STRING_OFFSET long
	get DUMMY long	# always 0
	get DUMMY long	# always 0
	get DUMMY long	# always 0
	
	math FILE_OFFSET += FILE_SECTION_OFFSET
	math STRING_OFFSET += STRING_SECTION_OFFSET
	
	goto STRING_OFFSET
	get FILE_NAME string
	
	log FILE_NAME FILE_OFFSET FILE_LENGTH
next i

[loreberg]

Holy, almost gave up on this, huge thanks herbert!

So far Aezay FSB extractor can get headerless audio (.ogg) data from these. If I get this right, it's pretty much blind luck now, trying to import this as raw audio attaching different type of metadata to make this correctly playable. I'll try to make something out of it, thanks a lot again

[loreberg]

UPDATE: SUCCESS

Thanks to herbert's QBMS script and tmiasko's fsb-vorbis-extractor (https://github.com/tmiasko/fsb-vorbis-extractor), 50 playable music files were extracted. Mostly spent time on trying make my broken ubuntu install work with cmake and libboost, all real work done by guys mentioned!

Extracted package:
http://www.megafileupload.com/grNH/out.zip

Cheers!

[Mr.Mouse]

Nice!

http://www.xentax.com/downloads/music/bp/out.zip

[thethiny]

Hi,
the game (early released) might have changed the way pak files work because it no longer works. Can someone please look into it?

I've attached a small .pak file I found.

[WRS]

if version flag is 3 (as your samples are), the structure is different. the file table/names are scrambled (maybe xor'ed with a value)

using only 2 samples we can guess the xor key

the format is identical to the v0 script above.

so the xor key is dead simple to figure out (A^B = B^A)

Code: Select all

 73 65 63 6B 72 69 74 79 74 68 72 6F 75 67 68 6F 

subtitles are compressed xml files - offzip can give you anything not understood

+------------+-----+----------------------------+----------------------+
| hex_offset | ... | zip -> unzip size / offset | spaces before | info |
+------------+-----+----------------------------+----------------------+
0x00000240 . 112 -> 145 / 0x000002b0 _ 576 8:7:26:0:1:94072ffa
0x000002b0 . 119 -> 257 / 0x00000327 _ 0 8:7:26:0:1:8ea354be
0x00000330 . 136 -> 306 / 0x000003b8 _ 9 8:7:26:0:1:52585fcf
0x000003c0 . 107 -> 139 / 0x0000042b _ 8 8:7:26:0:1:5dff2d17
0x00000430 . 179 -> 874 / 0x000004e3 _ 5 8:7:26:0:1:32680afb
0x000004f0 . 113 -> 145 / 0x00000561 _ 13 8:7:26:0:1:c09a307f
0x00000570 . 127 -> 176 / 0x000005ef _ 15 8:7:26:0:1:25e23833
0x000005f0 . 110 -> 143 / 0x0000065e _ 1 8:7:26:0:1:4e782f76
0x00000660 . 147 -> 678 / 0x000006f3 _ 2 8:7:26:0:1:d346d7c4
0x00000700 . 190 -> 1436 / 0x000007be _ 13 8:7:26:0:1:a18cc8e1
0x000007c0 . 111 -> 242 / 0x0000082f _ 2 8:7:26:0:1:021b4d91
0x00000830 . 141 -> 570 / 0x000008bd _ 1 8:7:26:0:1:0df1b817
0x000008c0 . 480 -> 3153 / 0x00000aa0 _ 3 8:7:26:0:1:b1d0c319
0x00000aa0 . 108 -> 139 / 0x00000b0c _ 0 8:7:26:0:1:52072cd6
0x00000b10 . 204 -> 1146 / 0x00000bdc _ 4 8:7:26:0:1:c8706d3f
0x00000be0 . 426 -> 4238 / 0x00000d8a _ 4 8:7:26:0:1:031b2e58
0x00000d90 . 328 -> 1914 / 0x00000ed8 _ 6 8:7:26:0:1:fa58436c
0x00001000

- 17 valid compressed streams found

[thethiny]

Okay so according to your findings, I tried offzip on them again and it did work, but not on "Fonts" and "Design" .pak files. However, I didn't get what you did exactly using the XOR key, okay so you figured it out by comparing both files, but what did you use the Key for? I mean if offzip was able to do the job, then the XOR is only for the table?

And btw many thanks for the help!!

The two mentioned files Fonts and Design are here.


Edit: So one thing I know is that XOR with 0 is unchanged, so we can expect the letters to show up following through the method the first guy unpacked.

Here are the values that I obtained from various files, where ? are not english alphabet.

Code: Select all

?cesygir???q?ygu
?fes??ir???tk?gu
pces?tir???t?hgu
qces?tir???u?hgu
ces?uiro???t?hgu
?ces??ir???p?ogu
zcesyvir??ht?igu
?des??ir?????jfu
dces?vir??ht?jgu
rcesyuir??ml?hgu

How did you obtain the key from those?


Update 2:
I manually calculated some files, and to my amazement XOR is really an amazing thing! I was able to find out the XOR key again, but only as 16 Bytes, meanwhile I'm sure the key is a bit longer. (24/32), or it is 16 bytes twice.

Update 3:

The XOR key is:

Code: Select all

73 65 63 75 72 69 74 79 74 68 72 6F 75 67 68 6F

Update 4:

I've extracted the files successfully but I'm unable to figure out the encoding of the names.

[WRS]

I've extracted the files successfully but I'm unable to figure out the encoding of the names.

the names are in their own table at the bottom as version 0 were. they are also xor'd.

also only subtitles are packed. the shaders are non-compressed binary though

[thethiny]

the names are in their own table at the bottom as version 0 were. they are also xor'd.

Using the same XOR technique is producing non English Letters. Are you sure about that?

[ali07saad]

Nice!

http://www.xentax.com/downloads/music/bp/out.zip

Thank you so much! i've been looking for the soundtrack " 1.music_story_sofiacapture.ogg " for over a month now.
tried a lot of programs to unpack the music.pak but with no luck.

you've made my day. Thanks again!