DeviceID

From Vita Dev Wiki
Jump to navigation Jump to search


Description[edit]

It is a unique 20 bytes (0x14) hexsequence inside your PSVita / PSTV. It is simply the SHA1 hash of openPSID. It is stored inside several files such as id.dat or calendar.db in order to check that the inserted memory card was not previously in another PSVita, else a database refresh is performed.

Why did SCE not simply use openPSID?

On PSP, OpenPSID was almost never used except for savedata.

On PS3, OpenPSID was used for act.dat checks, savedata / trophies when no PSN account bounded.

On PSVita, OpenPSID is used the same way as on PS3 but SCE secured still more its console by using the hash of OpenPSID and not OpenPSID itself.

This way, it is harder for people to know their openPSID. But since we have tm0: partition read access with exploits, we can simply read 0x10 Bytes at offset 0x850 of tm0:npdrm/act.dat to get openPSID.

[[1]]

 ux0:id.dat

Location of the files where it is stored[edit]

ux0:calendar/calendar.db
File Value Info
id.dat DID=297C4C0FA1F5A6E374FE4FE65535E03DC1643F2C
calendar.db tbl_app_authentication_info >> column open_psid >> 297C4C0FA1F5A6E374FE4FE65535E03DC1643F2C The value of the Hexsequence is stored as a Text value
Psid.png

Structure[edit]

Name length Example
DID 20 bytes (0x14) 297C4C0FA1F5A6E374FE4FE65535E03DC1643F2C