NfS Shift .BFF files

[dijotp]

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

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

[demolos]

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]

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]

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]

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]

Thank you Bugtest, you rock.

[Savage]

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

[aluigi]

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]

[aluigi]

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]

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]

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);

[zeeh]

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

[japamd]

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

Are you making one? It would be great!

[Simon]

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