Some development notes about detecting the PSID, User ID and Account ID for the current console/user:
To properly resign saves, you need to know those IDs (among other things), but I couldn’t find a simple way to gather them all in a consistent way across firmware versions (CFW, HEN, DEX, CEX, et al.) 
For example, the PSID can be recovered with lv2 peeks, but the address depends on the firmware version/type, so you must keep an address table and update the tool every time a new firmware shows up.
But… there’s a place where the PS3 always stores all those IDs already, and it’s a save-game’s PARAM.SFO 
so I used that in my advantage, to create a firmware-independent way to acquire the ids. 
Since I already needed to save the Apollo app settings, I decided to:
- on first run: create my own save-game file, using the internal PS3 save functions
- read my own save-game’s PARAM.SFO, and get the PSID, User ID, and Account ID
- save the detected IDs back into the App settings (so I can speed up the process next time)
- on next launch: just read the app settings, and load the IDs
The code for this trick can be found here (based on the psl1ght example by Kakaroto).
Continue reading Development notes (Apollo tool)
