PSP Firmware v2.81 Decrypted! (Yes the New Firmware)

[wraggster]

Dark Alex is damn fast, he has already released a Decryptor for the 2.80 that even supports the v2.81 firmware released today, heres what he posted:

I added support to psar dumper to decrypt 2.80.
Decryption could be done thanks to remains of kernel stuff in the 2.80 user ram dumped thanks to the recent tiff exploit.

UPDATE: added 2.60-2.71 decryption support. Until now, a 2.60 was required to decrypt those.

Mathieulh added this comment:

To anyone wondering, no you can't use 2.8x on devhook yet, why ?

1 - You need another compatible devhook version

2 - There is a new security in 2.8x reboot.bin that allready existed in 2.00+ IPLs, in 2.00+ the module possess a sha1 key area that is beeing generated by 2.00+ updaters before the modules are actually copied to flash0.
This key area is generated from idstorage data which is unique in every psp.
The 2.00+ IPLs check if the modules key area match the idstorage data.
If it didn't then it wouldn't let the module load. The reboot.bin didn't have this security, but 2.80+ reboot.bin now does, so technically you can only devhook a 2.80 firmware if you use the modules from your own nand dump. (which can only be achieved if you manage to dump the nand on 2.80 and extract lflash from it, at this time only people with a modchip can do this)
There are 2 ways to bypass this limitation, either we hack reboot.bin to load the modules regardless of the sha1 key area check results, either we manage to generate the sha1 key area on the modules.

The second solution is the best and can be achieved by performing a deep reverse into the 2.80 updater and reproducing its work.

Download and Give Feedback Via Comments

[Rocksil]

Yeah Im First

DevHook should come out quick

[Nafogel]

damn he's fast, sony just cant keep up with the homebrew scene, and yet sadly, they will probably never give up. I bet you a 2.82 will probably be out within the next week or so, lol, and it will probably be decrypted within a few days, double lol

[ExcruciationX]

Damn Fast! Booster should get on the stick, and release Devhook! Notice we all use the word "Damn" in our posts!

[BL4Z3D247]

Yeah Im First

DevHook should come out quick

i hope so, way to go Dark_AleX

[The_Ultimate_Eggman]

WE NEED DEHOOK !!! the capaign starts here lol.

[dejkirkby]

Damn, you guys don't mess about! Keep it up!

[YourStillWithMe]

agreed devhook is in need now screw emulating 2.80 lets just get 2.81 going to save ourselves longer now they probably wont release many UMD's with 2.80 now though it'll be like the 2.01 update

[juliusceasar]

Great news, but the reboot issues sound like there may be a delay with a devhook update (not forgetting that Sony got booster to shut the devhook site down too). Nice one Dark Alex

[pkmaximum]

Booster come back D:

We need this firmware emulated. I don't see why nobody is working on NAND flash emulation. That is 100% legal and if we accomplish that we will be able to emulate any firmware. Only we wouldn't be able to add stuff to it as it would be as normal as any other firmware.