Editing Secure Loader

The PS4 Secure Loader is the Initial Program Loader running on the [[AMD SAMU]] processor. It is [[Codenames|codenamed]] as 80000001. The PS4 Secure Loader is likely the main loader of the [[Secure Kernel]] (80010001) and of the Kernel (80010002).

See also the [https://www.psdevwiki.com/ps5/Secure_Loader PS5 Secure Loader].

= Structure =

== Header ==

{| class="wikitable"
! Offset !! Size !! Description !! Notes
|-
| 0x0 || 4 || Magic || 5E D7 9A 0B
|-
| 0x4 || 4 || Header Size || Little Endian, 0x280
|-
| 0x8 || 4 || Entry Point || Little Endian (0x100)
|-
| 0xC || 4 || Body Size || Little Endian (e.g 0x232D0)
|-
| 0x10 || 0x10 || Padding || Zeroes
|-
| 0x20 || 0x20 || SHA256 of the decrypted body || Verified from 0x280 to 0x23550 
|-
| 0x40 || 0xE0 || Padding || ASCII zeroes
|-
| 0x120 || 0x20 || Revision Nonce || (Likely) SHA256 of the IPL's revision, from this point onward, IPL is encrypted with two layers of AES-CBC crypto
|-
| 0x140 || 0x40 || MetaData ||
|-
| 0x180 || 0x100 || RSA2048 Header Signature || Verified with RSA modulus from SAMU BootROM from 0 to 0x180
|-
| 0x280 || 0x232D0 || Body ||
|-
| 0x23550 || 0x100 || RSA Footer Signature || Verified from header + body (somewhere else, likely PUP SM Manager)
|}

== MetaData ==

{| class="wikitable"
! Offset !! Size !! Description !! Notes
|-
| 0x0 || 0x20 || MetaData Body || Contains KeyRings
|-
| 0x20 || 0x20 || MetaData Digest || HMAC-SHA256 digest of (header plus metadata)
|}

== MetaData Body ==

{| class="wikitable"
! Offset !! Size !! Description !! Notes
|-
| 0x0 || 0x20 || KeyRing 1 || 
|}

= Revision Nonce Collection =

{| class="wikitable"
! Revision !! Hash !! Versions Supported !! Notes
|-
| 0x4 || N.A || All || 
|-
| 0x23 || {{hex| 60 CF 88 21 68 52 47 93 8B 6C 81 23 AE D2 A8 B0 B8 EF 9D 39 D9 AE B2 72 7A 0C 64 FD 81 01 18 E7}} || All || 
|- 
| 0x26 || {{hex| A5 26 93 8F 00 64 97 41 4F 3F 4E FE 25 EE F0 A3 0F 74 85 43 C9 5A 0A 3E 51 9B 08 BD 62 96 EA 77}} || All ||  
|-
| 0x27 || {{hex| 86 52 B2 B9 C7 5B DB C7 78 A2 9F 1C DE 20 38 7C CE 8D F7 44 5A 5F CC A1 A3 56 25 93 3E 0D 9B A1}} || All || Present in Internal Pro 3.70
|-
| 0x2D || {{hex| 7A E1 C8 43 B3 7E 82 B2 56 56 FD 6A 2F 3B 01 5C 19 4A 40 0D FB 38 71 42 8B CB 6B D8 83 F6 FB FE}} || All ||  
|-
| 0x31 || {{hex| 56 14 59 FD 36 A1 DF A7 DE A6 13 46 D7 BF B6 69 E5 94 18 8D 4F F7 B5 2B BE C0 F8 16 E9 29 23 81}} || All ||  
|-
| 0x32 || {{hex| 3B 52 5F 89 9F CA 97 C6 54 65 1F 8A A0 0E 3C 3D 60 14 EE F7 68 9F 54 E3 B9 78 51 A7 CA 32 A7 D4}} || All || 
|}