XeNTaX

Posted: **Wed Sep 16, 2009 6:49 pm**

Hi.
Anybody know how to extract these .BFF files?

Samples: http://66.7.218.134/~usaportu/pub/BFFs.rar

Posted: **Fri Sep 18, 2009 4:30 pm**

this game use zlib compression i looking into shift.exe with hexadecimal and i found zlib:

Error decompressing asset (zlib inflate): %s in pakfile %s

also i suppose the bff archives contain xml files
you can try to use Jaeder Naub to scan and rip the files inside bff archives

Posted: **Fri Sep 18, 2009 7:10 pm**

no, it's not zlib.
the most probable hypothesis it's that it uses chunks of 0x800 bytes compressed with a lzx-like algorithm.
this is the max I can say without the game.

Posted: **Sat Sep 19, 2009 9:54 am**

Maybe helps..here more examples:
http://www.zshare.net/download/65787584f473ba87/
And the official demo:
http://needforspeed.com/web/nfs/downloads

Direct link: http://cdn.needforspeed.com/data/downlo ... PCDEMO.exe 1.1Gb's

Posted: **Sat Sep 19, 2009 12:16 pm**

I have started to work on it this morning.
I have already figured almost all the fields included the rc4 encryption used in some bffs.
the compression algorithm should be called XMemDecompress and I guess it's referred to a cross-platform xbox function.
I will keep you update if there are news

Posted: **Sat Sep 19, 2009 12:49 pm**

Thank you Bugtest, you rock.

Posted: **Sat Sep 19, 2009 1:25 pm**

I found some info about Xmemcompress http://forums.gtamodding.ru/index.php?showtopic=10

Posted: **Sat Sep 19, 2009 2:13 pm**

good news, I did it :)
so stay tuned for a new version of QuickBMS and the needed script when all the tests will be finished completely

Posted: **Sat Sep 19, 2009 3:31 pm**

Posted: **Sat Sep 19, 2009 9:54 pm**

new version of quickbms: http://aluigi.org/papers.htm#quickbms
and the needed script for Need for Speed Shift: http://aluigi.org/papers/bms/nfsshift.bms

Posted: **Sat Sep 19, 2009 10:50 pm**

Bugtest wrote:new version of quickbms: http://aluigi.org/papers.htm#quickbms
and the needed script for Need for Speed Shift: http://aluigi.org/papers/bms/nfsshift.bms

Wonderful job!

If the string are translated, how do I put the files together again?

Thanks!

Posted: **Sat Sep 19, 2009 11:09 pm**

I make only the extractors.

if someone wants to write a quick rebuilder I suggest to use X12d equal to 0 (no encryption) and ever type 0 for each file so that it's not needed to use the compression.
the crc calculated on the files is just the simple classic one:

Code: Select all

unsigned int crtable[...0x77073096 polynomial...];
unsigned int crc = 0xffffffff;
for(i = 0; i < len; i++) {
    crc = crctable[(data[i] ^ crc) & 0xff] ^ (crc >> 8);
}
return(crc);

Posted: **Sat Sep 19, 2009 11:44 pm**

Cool

I hope soon we should have compiler working, good job!

Posted: **Sun Sep 20, 2009 4:55 am**

zeeh wrote:Cool I hope soon we should have compiler working, good job!

Are you making one? It would be great!

Posted: **Sun Sep 20, 2009 6:39 pm**

Don't know if this is against the Rules here but ...

I bet please please create a BFF Rebuilder because Shift don't reads extracted files and I want to start modding

XeNTaX

NfS Shift .BFF files

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