NfS Shift .BFF files

dijotp · **Joined:** Sat Jun 20, 2009 2:47 pm **Posts:** 6

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

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

demolos · **Joined:** Mon Mar 12, 2007 3:38 pm **Posts:** 27

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

aluigi · **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.

Savage · **Joined:** Sun Apr 17, 2005 11:00 am **Posts:** 476

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

aluigi · **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

dijotp · **Joined:** Sat Jun 20, 2009 2:47 pm **Posts:** 6

Thank you Bugtest, you rock. :keke:

Savage · **Joined:** Sun Apr 17, 2005 11:00 am **Posts:** 476

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

aluigi · **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

Savage · **Joined:** Sun Apr 17, 2005 11:00 am **Posts:** 476

aluigi · **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

japamd · **Joined:** Sat Sep 19, 2009 10:26 pm **Posts:** 41

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!

aluigi · **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:

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);

zeeh · **Joined:** Sun Jul 26, 2009 2:10 am **Posts:** 19

Cool

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

japamd · **Joined:** Sat Sep 19, 2009 10:26 pm **Posts:** 41

zeeh wrote:

Cool

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

Are you making one? It would be great!

Simon · **Joined:** Sun Sep 20, 2009 5:41 pm **Posts:** 175

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

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NfS Shift .BFF files

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