SLB2

From Vita Development Wiki

SLB2 is the format used to store the encrypted bootloaders on the device.

Contents

Structure

SLB2 embedded ENC Files in PUP SPKG

On 3.50 reset, 3.60 retail:

  • second_loader.enc, size: 0xD400 bytes
  • second_loader.enp, size: 0xD400 bytes
  • secure_kernel.enc, size: 0x8400 bytes
  • secure_kernel.enp, size: 0x8400 bytes

SLB2 embedded ENC Files on PSVita eMMC

On 3.50 reset, 3.60 retail:

  • second_loader.enp_, size: 0xD400 bytes
  • second_loader.enp, size: 0xD400 bytes
  • secure_kernel.enp_, size: 0x8400 bytes
  • secure_kernel.enp, size: 0x8400 bytes

ENC file structure

Offset Size Description
0x0 0x4 0x64B2C8E5 Magic
0x4 0x4 Data segment location
0x8 0x4 Unknown
0xC 0x4 Unknown/Zero
0x10 0x4 Data size
0x14 0xC Unknown
0x20 0x20 Data segment SHA256
0x40 0x10 System Software version in ASCII (ex: "0000360000000000")
0x50 0x90 Zero
0xE0 0x1E0 Encrypted Header

The last 0x340 bytes is a footer that likely contains a signed MAC of the plaintext data.