Gaming First signed homebrew on PSP!

Snailface

My frothing demand for 3ds homebrew is increasing
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This simple homebrew POC works on your PSP without any hacks!
Directions: Put EBOOT in PSP-->GAME-->ANYFOLDER

Link

BTW I'm using a PSP-3001, Firm. 6.35 (No hacks or cfw!)
BTWA I didn't write this brew -- credits in software
tongue.gif
 

MFDC12

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it might not lead to iso's. i would honestly rather have this lead to a cfw so we can run both signed and unsigned (and have access to the recovery menu and stuff) so we dont have to sign every single thing.
 

Snailface

My frothing demand for 3ds homebrew is increasing
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The author of this landmark homebrew (in first post), kgsws, explains how he did it (among other juicy things):

QUOTE said:
How?
Simple, notice it contains ~PSP header from demo game (UCES00206), it is exactly same header.
It is easy to craft last 16 bytes of encrypted data block to match header CMAC - yes, that's the trick
smile.gif


There are some strange thigs, it can't run homebrews with bigger executable block (data block does not matter), and because of ~PSP header, it has to match exact size of original game.

This trick might be possible on firmware kernel modules to get permanent HEN on non-pandrorable PSPs, i was not able to do it but i was not trying that much.

PS: i am not only one who found this trick
 

thedicemaster

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Exaltys said:
I suppose this may lead to booting .iso from OFW?
not very likely.
this will work only with user mode homebrew, because it identifies itself as a game demo and those only have user-more access.
kernel-mode can be used, but that would mean building a kernel-mode exploit in every single homebrew app that needs kernel access.
 

SifJar

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Jamstruth said:
So not exactly signed then...
It IS signed, just not completely by kgsws. Bits of it are signed, and the bits which can't be are copied from a legit demo so they are still signed, even though they were properly signed by Sony. So everything IS signed.
 

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