You can still check the file hashes with stfschk, but you can't be sure that data was not altered if the signature is invalid.įor datting the "trials" with good signatures, I can assist. Of course, more samples will be needed for decisive action, but it seems that the first 568 bytes (0x238) can be skipped when hashing. Everything after the highlighted byte is matching in the attached image. Unfortunately, this will corrupt the signature as well. Heres looking at one dump, comparing my dump (left) and the scene dump in the dat (right) of N+ (World) (XBLA). So it's understandable you might want to erase this data. The file is bound to the console and only works if the signature and console info match. If you buy a title or DLC these stfs files will contain console specific information when you make a purchase. Unfortunately there's no trials for any DLC, so it's much more difficult there. So from a preservationist's standpoint these are without doubt the files that should be archived. The trial versions of course have a good signature and are not console bound.
#XBOX 360 BIOS DUMP MANUAL#
So there no need for manual patching at all. Nowadays with tools like dashlaunch for the x360 this happens upon load.
#XBOX 360 BIOS DUMP FULL#
There's just a single bit in the header that needs to be flipped to make it a full version. These are identical to the full versions. To my knowledge all XBLA and XBLIG games have/had Trial versions. You can't do that with a digital signature.Ī good (and widely unknown tool) to test the integrity of a stfs file is found here: Checksums can be modified after altering data. This is largely different to checksums found in other roms. With this signature you can verify that the data if the STFS file is unaltered or, to put it in another way, cryptographically prove it is a "good dump". The bytes 0x4 to 0x103 contain a digital signature, signed by Microsoft. The author of this tool falsely assumed that in this area console specific data was stored.
#XBOX 360 BIOS DUMP PATCH#
The reason for this is a tool called "YarisSwap" that was and maybe still is a popular tool to patch downloaded trials to run as the full game. I learned a lot by studying code others wrote.įirst (and this might already be known), most LIVE games floating around the net and also most, scene releases have the bytes 0圆 to 0xB zeroed. I studied the file structure of x360 digital titles (STFS files) quite thoroughly about a year ago.ĭocumentation available on the net is really shitty.
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