Bon le web francophone ayant assez peu d'informations exhaustives sur ce problème, j'ai donc commencé à prospecter chez les anglophones.
En cherchant bien, je suis tombé sur un tuto pour modifier les keys défectueuses:
Howto: Fix idstorage keys
19 05 2007
“The keys are various settings stored in the flash. They are mostly low-level stuff that concerns the operation of things like the USB and WLAN. Screwing up the keys can result in the USB not working quite right, the WLAN hanging, brightness issues, or low battery issues. Generally, you don’t want to mess with the keys. TA-082/86 PSPs need one key to be modified in order to run the 1.5 kernel. Old downgraders messed with more than that one key.”
So did the downgrader that I used to downgrade my PSP from firmware 2.71 to 1.5. Corrupted idstorage keys were the reason why psplink didn’t work for me when I first played around with it. It took me a while until I figured out that using the first version of the downgrader for TA-082 models was the reason.
User ChillyWilly from the eXophase forums released his application KeyCleaner that “[...] shows the state of the IdStorage in your PSP, and makes corrections to common problems caused by the old downgraders (TA-082/86 only).”. KeyCleaner is able to restore all keys but key 0×43 automatically. To restore the key 0×43 you need a dump of the non corrupted value. You should be able to aquire a good key 0×43 file from the net, a good PSP, a friend, etc. You can download the recent version of the application here.
That is the way ChillyWilly recommends to fix the keys of your PSP:
1. Run keyCleaner
2. Choose Dump the keys (just in case). That gives you a copy of all the current keys in a folder called “keys” inside the KeyCleaner folder.
3. Choose Fix without files. This should fix all the keys but 0×43.
4. Acquire a good key 0×43 file from the net, a good PSP, a friend, etc.
5. Make another folder in the KeyCleaner folder, let’s call it “good keys”.
6. Copy that good key 0×43 file to that folder. Make sure the name is “0×0043.bin” or it won’t be recognized.
7. Run KeyCleaner and choose Fix with files. Hit O on the PSP until you see the name of the folder at the top (remember we named the folder “good keys” ). Press X to select the “good keys” folder. This will fix key 0×43.
8. Choose Dump the keys again. This will then rename the original dump to “keys0000″ and make a new dump of your now good keys into the “keys” folder.
As the application reads and writes to the flash of your PSP there is theoretically a change of bricking it. To reduce the risk of a bricked PSP make sure to read the README file that comes with the application and follow the instructions.
Et une réponse de Chilly Willy concernant directement la clée corrompu qui apparait dans ma capture d'écran:
KC won't fix key 0x41 when it's bad all by itself. The way to fix key 0x41 is:
Run IdStorage Manager and dump the keys.
Copy a good 0x0041.bin over top the dumped one.
Run IDSM again and select verify/fix keys.
That will replace key 0x41 with the contents of the good 0x0041.bin file. You can PM someone for a copy of that key... it's universal (among phats), so you don't have to worry about matching models or whatnot.
Bref, je suis maintenant à la recherche d'un dump de clées valide
On va bien voir où ça me mène