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Spock is the PSP hardware cryptography engine responsible for the raw sector level decryption of UMD’s. Named after Captain Spock of Star Trek. Mapped to 0xBDF00000.

Executing commands[edit | edit source]

You can more or less access Spock through Lepton's ram (there is some hidden test mode on Lepton allowing you to do this). Mathieulh will tell more on this later if he ever get the time to clean up those sources.

Mapping Structure (PSP)[edit | edit source]

0xBDF00000 = Spock Signature
0xBDF00004 = Spock Version
0xBDF00008 = Spock Error
0xBDF0000C = Spock Proc Phase
0xBDF00010 = Spock CMD Number
0xBDF00014 = Spock Result
0xBDF00018 = Unknown?
0xBDF0001C = Spock Status
0xBDF00020 = Spock Status Asynchronous
0xBDF00024 = Spock Status Asynchronous End
0xBDF00028 = Spock Status End
0xBDF0002C = Spock Source Address
0xBDF00030 = Spock Destination Address

sceUmdMan_driver_1b1bf9fd = sceUmdExecRead10Cmd (0xA)
sceUmdMan_driver_e3716915 = sceUmdExecRead10Cmd (0xA)
sceUmdMan_driver_f819e17c = sceUmdExecReadMKICmd (0x8)
sceUmdMan_driver_6d17fd57 = sceUmdExecReadMKICmd (0x8)

Commands[edit | edit source]

SPOCK Operations:
0x01: Init1
0x02: Init2
0x03: Step1
0x04: Step2
0x05: Step3
0x08: Decrypt UMD master key
0x09: Decrypt IDStorage UMD leaves
0x0A: Decrypt UMD Disc Sector
0x0B: Reset SPOCK
0x0C: Decrypt UMD Disc Sector Debug

Command 1 (Init 1)[edit | edit source]

Command 2 (Init 2)[edit | edit source]

Command 3 (Step 1)[edit | edit source]

Command 4 (Step 2)[edit | edit source]

Command 5 (Step 3)[edit | edit source]

Command 6[edit | edit source]

Command 7[edit | edit source]

Command 8 (Decrypt UMD master key)[edit | edit source]

Command 9 (Decrypt IDStorage UMD leaves)[edit | edit source]

Spock command 9 key is used to decrypt UMD leaves stored in IDStorage. Those leaves are then used in Spock command 8 to decrypt the UMD master key (per disc key). Then this key is used in Spock command 10 to decrypt the UMD raw sectors. Each different PSP region seems to have its own set of UMD keys.


more info on Spock by mathieulh

Command 10 (0xA) (Decrypt UMD raw sectors)[edit | edit source]

Command 11 (0xB) (Reset Spock)[edit | edit source]

Command 12 (0xC) (Decrypt UMD Disc Sector Debug)[edit | edit source]

  • Seems to exist only on KICHO DENCHO PSP firmware and devkit firmware, inside UMDMAN.prx

Where are spock commands used[edit | edit source]

  • Commands 8 and 0xA are used on psp retail firmware, as well as testkit firmware
  • Commands 1, 2, 3, 4, 5, 8, 9, 0xA and 0xB are used on AV test tool firmware
  • Commands 1, 2, 3, 4, 5, 8, 9, 0xA, 0xB and 0xC are used on Kicho Dencho firmware, which is a special factory firmware.
  • Commands 1, 2, 3, 4, 5, 8, 9, 0xA, 0xB and 0xC are used on devkit firmware as well.
  • Usage of these commands can always be found in UMDMAN.prx