PSX games on OFW

[nathu]

I was just wondering.. Did anyone look at PSX games and whether they're exploitable? I just put a PSX EBOOT on my TA-88v3 PSP 2004 and it didn't say corrupted data, it showed the XMB icon, the background and played the sound it's supposed to play. But, when I tried to start it, it said invalid copyright data. I'm thinking two things:
Maybe these games are somehow exploitable. Maybe a special EBOOT can be crafted that looks like a PSX game, but that runs arbitrary code through the icon / background video that's supposed to play in the XMB.
Maybe we can find a way to sign these PSX games, to make it appear as if we have valid copyright data. This would lead to two things:
Running backup PSX games on OFW.
If we can sign PSX games, maybe we can craft EBOOTs to make them look as if they were PSX, but actually contain homebrew and sign them. This would mean running homebrew on OFW.
I think these would be worth looking at.

PS: I have absolutely no knowledge about hacking (especially the PSP). If this post is completely stupid and doesn't make any sense, please, hall of shame it.

 

[Archaemic]

This has been proposed before. I don't know about forging the copyright data (it's 16 bytes, right? That's 128-bit, which is going to be hard to forge, and certainly time consuming), but if we did, running PSX games on OFW would be the limit of it, unless we found an exploit in POPS. Like all emulators, POPS runs in a sandbox. We can't exactly do much of anything with it unless we find a way to break out of that sandbox, and that will probably be quite hard. Besides, if we broke the copyright signing, all they'd do is increase the number of bits in the next firmware and make all PSX games that ship on that firmware have a larger signature. Not a long-term solution.