DLC Decryption

[Hykem]

valkyria chronicles 2 is unable to create valid savedata in crypto mode. after it's created, any attempt to load it will fail and try to delete it, which will also fail because PARAM.SFO is at 0 bytes and permanently locked by the emulator, so it can't be deleted. game still seems to work only in non-crypto mode. attempting to load a real psp savefile in crypto mode fails too.

savefile in question was in: http://www.emunewz.net/forum/showthread....7#pid37637

dlc data for it also fails, it creates empty files in tmp folder, and also misses half of them. copying them manually makes them work and appear in extra menu though. is this (dlc in ms0/psp/game/gamecode/ that gets copied into tmp/gamecode/dlc) only for encrypted dlc or should decrypted dlc also work this way?

example, one of the dlc for this game is ULUS10515/DL11 which contains DL11.EDAT which is 16 bytes big and DL11_DATA.EDAT which is 148 kb big. in tmp all you'll find is DL11.EDAT which is 0 bytes. the one with data is never copied.

edit: seems so. when i tried encrypted dlc, it was decrypted and appeared right. another decrypted attempt in other game also produced one empty file.

note that because of the date problem ("Save data creation date does not match the PSP system, so content unlocked with data link or passwords will be deactivated") none of the dlc or data link/password unlockables will save anyway.

Currently the decryption should only be working properly for games that load the .EDAT files right away (e.g.: Disgaea 2).
This one seems to be doing this in two steps, which should probably require some special attention.
As for the SAVEDATA, I found out there's an alignment issue, that's why it's getting locked. Working on it right now.

are you going to work on homebrew's and game demos having an encrypted EBOOT.PBP
for example
http://www.emunewz.net/forum/showthread.php?tid=109975
and
http://pspdemos.wordpress.com/2008/07/29...-psp-demo/

this doesn't work aswell
http://www.emunewz.net/forum/showthread.php?tid=77637
because of
08:10:26 INFO hle.IoFileMgrForUser - Process - hleIoOpen filename = ms0:/PSP/GAME/NPUF30014/PSP-KEY.EDAT flags = 40000001 permissions = 00
08:10:26 INFO hle.scePspNpDrm_user - Process - sceNpDrmEdataSetupKey edataFd=0x3

Yes, part of that is already being worked on.

And what about other DLC methods? For example, Killzone Liberation uses the PSP\Game\ folder to seek for the DLC packages. Here are some instructions directly from Guerrilla because it's free:
http://www.killzone.com/kz3/en_GB/blog/n...-back.html

If i add the DLC files the way you told the game doesn't load it. Here a log from this try:


If i try the way Guerrilla told on that blog the game crash and JPCSP pauses automatically and it seems that JPCSP can't handle the DLC files. Here is a log from this situation:


Those are the files from the DLC:

Ah yes, thanks for pointing this out. Currently this kind of DLC is still not supported, I'm still working on it.
Only .EDAT DLC should be able to work for now. Sorry.


Thank you all for the reports, please keep testing more games and different DLC content. The more information I gather about this the easier it will be to implement it.

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prinny 2, the dlc works. saves created with crypto are still invalid on a real psp. i guess that part wasn't fixed/tackled yet.

Nice. Thanks for testing.