I run a PC PS1 emulator <-> PS3 PSV conversion "service"(no, I don't charge for it) on another forum, and I'd like to figure out how the PSV file format works, so I could possibly write an app for PC/Mac that can just do it from there, or worst case scenario, write an app for the PS3 that does it on the PS3 if we can't figure out how to get the signing keys for it.
Here's what the PS3 Dev Wiki has on it:
PS1 Single Save ? (.PSV)
PSV is a PS1 "block" in "PS3 format". When exporting to a "standard" USB device the Game Saves are converted to "blocks" in PS3 format. The name of the exported file is the File Name (identifier of the block is on Hexa format)
When trying to copy not valid save data:
From corrupted Data ( Blue Cube as Icon):On Informations: Lock Copying prohibited, when trying to copy:"the data is corrupted."
from modify data (ICON as it suppose to be) : During process of copy: "the data is corrupted." (not sure why)
from complete hand made (PocketStation) .PSV : During process of copy: error 80029303.
Size: 9KB (only one single save data using one block), Ps3 XMB display a different size.
Offset Size Value Description
0x00000 4 .VSP
0x00005 4 filled with zero
0x00008 40
0x00030 52
0x00064 20 File Name (see .VM1)
According to this site the PSV header has a 40 bit(byte? could be a typo) digital signature to let the PS3 know that the save is "legit". Since we're just talking about PS1 saves here, do you think the signing key may be in the PS3's LV2 somewhere? Or does someone happen to know what syscalls the ps3 makes to sign such files?
Also, if it is indeed only 40 bits for the signature, do you think we could brute force it in a reasonable amount of time? I seem to remember DES being broken in about 24 hours, due to it only containing a 56bit key.
C'mon guys, let's make it easier to use our emulator saves with our PS3s.
Here's what the PS3 Dev Wiki has on it:
PS1 Single Save ? (.PSV)
PSV is a PS1 "block" in "PS3 format". When exporting to a "standard" USB device the Game Saves are converted to "blocks" in PS3 format. The name of the exported file is the File Name (identifier of the block is on Hexa format)
When trying to copy not valid save data:
From corrupted Data ( Blue Cube as Icon):On Informations: Lock Copying prohibited, when trying to copy:"the data is corrupted."
from modify data (ICON as it suppose to be) : During process of copy: "the data is corrupted." (not sure why)
from complete hand made (PocketStation) .PSV : During process of copy: error 80029303.
Size: 9KB (only one single save data using one block), Ps3 XMB display a different size.
Offset Size Value Description
0x00000 4 .VSP
0x00005 4 filled with zero
0x00008 40
0x00030 52
0x00064 20 File Name (see .VM1)
According to this site the PSV header has a 40 bit(byte? could be a typo) digital signature to let the PS3 know that the save is "legit". Since we're just talking about PS1 saves here, do you think the signing key may be in the PS3's LV2 somewhere? Or does someone happen to know what syscalls the ps3 makes to sign such files?
Also, if it is indeed only 40 bits for the signature, do you think we could brute force it in a reasonable amount of time? I seem to remember DES being broken in about 24 hours, due to it only containing a 56bit key.
C'mon guys, let's make it easier to use our emulator saves with our PS3s.