Secure Loader

The PS4 Secure Loader is the SAMU Initial Program Loader. It is codenamed as 80000001. The PS4 Secure Loader is likely the main loader of the Secure Kernel (80010001) and of the Kernel (80010002) .

Structure

Header

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

MetaData

Offset	Size	Description	Notes
0x0	0x20	MetaData Body	Contains KeyRings
0x20	0x20	MetaData digest	HMAC-SHA256 digest of (header plus metadata)

MetaData Body

Offset	Size	Description	Notes
0x0	0x20	KeyRing 1

Revision Nonce Collection

Hash	Versions Supported	Notes
N.A	All	Revision 0x4
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	Revision 0x23
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	Revision 0x26
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	Revision 0x27, Present in Internal Pro 3.70
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	Revision 0x2D
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	Revision 0x31
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	Revision 0x32