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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).
SAMU IPL, codenamed as 80000001, is the main loader of the Secure Kernel (80010001) <br>
The header contained in it contains the following information:


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


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


== MetaData ==
= MetaData Info =  


{| class="wikitable"
{| class="wikitable"
! Offset !! Size !! Description !! Notes
! Offset !! Size !! Description !! Notes
|-
|-
| 0x0 || 0x20 || MetaData Body || Contains KeyRings
| 0x0 || 0x20 || MetaData Body || Contains Keyslot Keys
|-
| 0x20 || 0x20 || HDR + MetaData SHA256HMAC || SHA256 of hdr plus metadata (HMAC)
|-
|-
| 0x20 || 0x20 || MetaData Digest || HMAC-SHA256 digest of (header plus metadata)
|}
|}


== MetaData Body ==
= MetaData Body =


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


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{| class="wikitable"
{| class="wikitable"
! Revision !! Hash !! Versions Supported !! Notes
! 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 ||
| {{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}} || ???5.01-5.05??? || Revision 0x2D
|-
|-
| 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 ||
|}
|}
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