1100°
132w ago - Just a few days back we saw a video of
PS Downgrade software by the PSJailBreak Team in action, and today
graf_chokolo has posted on
xorloser's blog (linked above) that he has decrypted PS3 Firmware 3.50 and while it's still a WIP it could very well lead to a free public PlayStation 3 downgrader alternative.
To quote: I am able now to decrypt and decompress CORE_OS_PACKAGE.pkg from PS3 PUP-Files. The decrypted and decompressed package is a copy of FLASH region where all the important SELFs and isolated SPUs stored, e.g. lv1.self or isoldr.
So, now i could downgrade PS3 by writing this decrypted image to FLASH manually, without Update Manager from HV. In fact, Update Manager just do this But the problem is, that the SHA-1 hash values for these files are stored not in flash but in SC EEPROM and i don't have access to it yet
Here is a snippet from CORE_OS_PACKAGE.pkg 3.15:
Offset 0 1 2 3 4 5 6 7 8 9 A B C D E F
00000000 00 00 00 01 00 00 00 17 00 00 00 00 00 6F FF E0 .............oÿà
00000010 00 00 00 00 00 00 04 60 00 00 00 00 00 04 00 00 .......`........
00000020 63 72 65 73 65 72 76 65 64 5F 30 00 00 00 00 00 creserved_0.....
00000030...