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Author Topic: Another PS2 .PAC/.DAT/.BIN thread (Just asking for advice)  (Read 3556 times)

Solidus

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Another PS2 .PAC/.DAT/.BIN thread (Just asking for advice)
« on: February 12, 2015, 06:28:01 pm »
   I have recently been looking into ripping 3D models from PS2 games and have naturally met with a brick wall in file encryption. Yes, I have tried 3DX Ripper but for my purposes it isn't accurate enough and thus I need the models directly. As it stands now, I'm at a loss for how to extract the algorithms for unpacking the files of the game games I have in mind. With information on this specific topic kinda hard to come by (a lot of what I've found either involves 3DX Ripper or SVR tools along with a surprising amount of virus laden sites) I'm currently looking to hear peoples experiences with these file types directly. Right now, I'm investigating rams dumps with PCS2X 0.9.8 or PS2rd in hopes of finding the algorithm or, at least, the next step to work with within. As the topic states, if you have any suggestions or information based on your own work with these compression types please share it. Below are some basic answers to questions you might have.


"Hacking is hard."
You don't say? Sarcasm aside, I know this requires effort and won't be done in a day, nor do I expect it to be. This is a pet project I return to every few days to whittle away at.

"What games are you trying to decrypt?"
Ring of Red (.BIN)
Gungriffon Blaze (.PAC)
Front Mission 4,5,Online (4  and 5 use .DAT, not sure about Online)


"You do know they are gener-"
Yes, I know .BIN/.DAT/.PAC are generic catch alls for unique encryptions.

"What are you going to do with the models?"
Scale them down, add some ball joints, 3D print them, put them on my shelf.

"Have you tried QuickBMS?"
Yes, with no luck.

"Have you used a hex editor to view the files?"
Yes, all of them are solely gibberish except for the DVDIMAGE.DAT of Front Mission 4 which contains what I think are references to model files but I've never seen "femur" and "clavicle" used in relation to a mech before.

henke37

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Re: Another PS2 .PAC/.DAT/.BIN thread (Just asking for advice)
« Reply #1 on: February 13, 2015, 02:44:27 am »
Those files are extremely likely custom archive files. You have to figure out their format. Look for a pointer table, it's often at the start of the file.
« Last Edit: February 15, 2015, 01:09:16 pm by henke37 »

Solidus

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Re: Another PS2 .PAC/.DAT/.BIN thread (Just asking for advice)
« Reply #2 on: February 15, 2015, 01:06:00 pm »
I'll poke around their unpacked ISOs again and see what I can find.

Solidus

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Re: Another PS2 .PAC/.DAT/.BIN thread (Just asking for advice)
« Reply #3 on: March 05, 2015, 12:31:14 pm »
Those files are extremely likely custom archive files. You have to figure out their format. Look for a pointer table, it's often at the start of the file.
By "file" do you mean the individual .dat or something separate from the .dat? Right now I'm looking further into reversing.

henke37

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Re: Another PS2 .PAC/.DAT/.BIN thread (Just asking for advice)
« Reply #4 on: March 06, 2015, 05:13:48 am »
Of course I am talking about the files the entire topic is about.

Solidus

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Re: Another PS2 .PAC/.DAT/.BIN thread (Just asking for advice)
« Reply #5 on: March 06, 2015, 04:12:56 pm »
Made some progress.
Front Mission 5's .dats lack any sort of pointers I can make out, A few start with TIM2 which I know is a file type but the rest is just gibberish
Steambot Chronicles' .dats come with .fats which is helpful
Cant find any file pointers in the Ring of Red model .bin either

Edit: Found out SLUS  files are useful.

March 11, 2015, 01:14:23 am - (Auto Merged - Double Posts are not allowed before 7 days.)
Still not sure how to proceed with FM5 and Ring of Red. Their SLUS files are helpful for seeing what files are stored within the respective .dats and .bin but given the files within both are obscured when viewed in hex I'm not sure how to proceed. I've seen tutorials on how to write scripts to extract files when you can see them but not what to do when you can't.     
« Last Edit: March 11, 2015, 01:14:23 am by Solidus »

Solidus

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Re: Another PS2 .PAC/.DAT/.BIN thread (Just asking for advice)
« Reply #6 on: March 13, 2015, 11:02:50 pm »
Ok guys, I'm officially lost. I've been searching for days and can't find out what to do when given an encrypted archive. If anyone has advice, now would be the time.