Cmep Key Ring Base

Physical address = 0xE0058000 + 32 * slot

Permission bits

If a key slot is not locked, it can target f00d memory or unlocked keyslot

Bit	Function
0x01	Encryption operation allowed
0x02	Decryption operation allowed
0x04	? operation allowed
0x08	? operation allowed
0x10	?
0x20	Master Keyslot can target user keyslot (based on Mask Group below)
0x40	Keyslot Pairing Lock Mask Group 0 (Master slots 0x204-0x205 and user slots 0-7)
0x80	Keyslot Pairing Lock Mask Group 1 (Master slots 0x206-0x20D and user slots 8-0xF)
0x100	Keyslot Pairing Lock Mask Group 2 (Master slots 0x340-0x343 and user slots 0x10-0x1F)
0x200	Keyslot Pairing Lock Mask Group 3 (Master slots 0x344-0x353 and user slots 0x20-0x2F)
0x400	Locked Keyslot can target f00d memory
0x800	can be written directly by f00d
0x1000	can be read directly by f00d

Key Ring Slots 0xE0058000

Slot	Initial Valid	Initial Protection	Protection (1.69)	Ever Valid (1.69)	Per Console? (1.69)	Set By?	Description
0	N	0x0442	0x0442	Y	?	?	?
1	N	0x0442	0x0442	N	?	?	?
2-7	N	0x0442	0x0040	N	?	?	?
8	N	0x049F	0x0081	Y	Y	first_loader (0x206/0x207)	SLSK per-console key (encrypt)
9	N	0x049F	0x0080	N	?	first_loader (0x206/0x207)	SLSK per-console key (decrypt)
0xA	N	0x049F	0x0080	Y	N	first_loader (0x208-0x20D)	SLSK metadata key
0xB-0xF	N	0x049F	0x0080	Y	N	first_loader (0x208-0x20D)	?
0x10	N	0x0502	0x0502	N	?	?	supports decryption only
0x11-0x1F	N	0x0502	0x0100	N	?	?	?
0x20	N	0x061F	0x0200	Y	?	first_loader (0x344)	Derived from 0x344, used for hmac-sha256 over ENC files.
0x21-0x24	N	0x061F	0x061F	N	?	?	supports encryption and decryption
0x25-0x2F	N	0x061F	0x0200	N	?	?	?
0x30-0x34	N	0x041F	0x041F	N	?	?	?
0x35-0x7F	N	0x041F	0x0000	N	?	?	?
0x80-0xFF	X	0x0000	0x0000	X	?	?	Not used
0x100	N	0x041F	0x041F	N	?	?	?
0x101-0x17F	N	0x041F	0x0000	N	?	?	?
0x180-0x1FF	X	0x0000	0x0000	X	?	?	Not used
0x200-0x203	Y	0x0002	0x0000	Y	?	?	?
0x204-0x205	Y	0x006F	0x006F	Y	Y	?	?
0x206	Y	0x00AF	0x00A0	Y	?	?	Used to derive key used to decrypt personalized layer over ENC. Should be per-console.
0x207	Y	0x00AF	0x00A0	Y	?	?	Used instead of the above key when secret debug mode is set. (Possibly non-per-console?)
0x208-0x20D	Y	0x00AF	0x00A0	Y	?	?	6 keys used to decrypt ENC metadata, which one is used depends on key revision in ENC header.
0x20E-0x20F	Y	?	0x0010	Y	?	?	Maybe per-console eMMC crypto keys? Protected by second_loader.
0x210-0x211	Y	0x001F	0x0000	Y	?	?	?
0x212	Y	0x001F	0x001F	Y	Y	?	AES256-CMAC key used by KIRK commands 0x12 and 0x19.
0x213	Y	0x001F	0x001F	Y	Y	?	Used to derive SMI keys, which are used for factory fw decryption.
0x214	Y	0x001F	0x0000	Y	?	?	AES256CBC key used to derive (by encryption) keyslots 0x514 and 0x515 in second_loader. IVs hardcoded in second_loader.
0x215	Y	0x001F	0x0000	Y	?	?	?
0x216	Y	0x001F	0x001F	Y	?	?	AES256CBC key used to derive (by encryption) keyslots 0x502-0x504 in second_loader on FW >= 0.996. Single IV hardcoded in second_loader. For FW < 0.996, the keyslots 0x502-0x504 are hardcoded in second_loader.
0x217	Y	0x001F	0x0000	Y	?	?	?
0x218-0x2FF	X	0x0000	0x0000	X	?	?	Not used
0x300-0x33F	Y	0x0002	0x0000	Y	?	?	?
0x340	Y	0x012F	0x012F	Y	?	?	Used to decrypt keys into the 0x10 keyslot.
0x341-0x343	Y	0x012F	0x0120	Y	?	?	?
0x344	Y	0x022F	0x0220	Y	?	?	Used to derive key 0x20 in bootrom.
0x345-0x348	Y	0x022F	0x022F	Y	?	?	Used to decrypt keys into one of the 0x21-0x24 keyslot.
0x349-0x353	Y	0x022F	0x0220	Y	?	?	?
0x354-0x3FF	Y	0x001F	0x0000	Y	?	?	?
0x400-0x47F	N	0x1800	0x0000	N	?	?	?
0x480-0x4FF	X	0x0000	0x0000	X	?	?	Not used
0x500	N	0x1800	0x1800	N	?	?	?
0x501	N	0x1800	0x1000	Y	N	first_loader	Used by bootrom first_loader to figure out whether to load from eMMC or ARM comms after reset
0x502-0x504	N	0x1800	0x1800	Y	Y	second_loader	Related to Ernie SNVS.
0x505	N	0x1800	0x0000	N	?	?	?
0x506	N	0x1800	0x1800	Y	?	?	?
0x507	N	0x1800	0x1800	Y	N	?	?
0x508	N	0x1800	0x1800	Y	N	second loader	Baryon version (from Ernie cmd 0x1). 4 bytes. Set to 0x100010A on FW 1.05, 0x0100010B on FW 1.50, 0x100060D on FW 1.692. If lower (older) than 0x90903, old Syscon protocols (unencrypted packets and NVS) are used.
0x509	N	0x1800	0x1800	Y	Y	second loader	ConsoleId of unit. Comes from IdStorage (eMMC).
0x50A	N	0x1800	0x1800	Y	?	second loader	QA flags. 0x10 bytes.
0x50B	N	0x1800	0x1800	Y	?	second loader	From 0xD2 SNVS block 0, 8 bytes. (?Mgmt Data?)
0x50C	N	0x1800	0x1800	Y	N	second loader	Some boot flags. Like Boot type indicator 1. Set to 1 on FW 1.692 and newer, 0 on older.
0x50D	N	0x1800	0x1800	Y	Y	second loader	OpenPSID of unit. Comes from IdStorage (eMMC).
0x50E	N	0x1800	0x1800	Y	Y	second loader	Current firmware version. Comes from SNVS (Ernie).
0x50F	N	0x1800	0x1800	Y	Y	second loader	Factory firmware version. Comes from IdStorage (eMMC). 4 bytes.
0x510	N	0x1800	0x1800	Y	Y	second loader	DIP Switches. 0x20 bytes. Comes from Ernie cmd 0x90 offset 0xE0.
0x511	N	0x1800	0x1800	Y	Y	second loader	Unique per boot session id. Ernie shared 0xD0 session key. AES128CBC key used to encrypt with null IV a buffer of size 0x30 bytes coming from Ernie in second_loader. Also used to enc/dec the content of Ernie "packets 0x28" coming from Ernie. If (baryonVersion < 0x90903 && (ernieDLVersion & 0xffffff) < 0x3600) it is zeroed by second_loader.
0x512	N	0x1800	0x1800	Y	Y	second loader	Ticket count. Used as a challenge at the start of each secure Ernie encrypted communication, for example for SNVS read/write. Set to a random value when session key is set. Incremented by 1 after each usage.
0x513	N	0x1800	0x1800	Y	N	second loader	DRAM size. Set to 0x20000000 by default, 0x40000000 on DevKit in DevKit Memory Size mode.
0x514	N	0x1800	0x1800	Y	N?	second loader	F00d-cmd F01 AES-128-CMAC key. Protected on FW 1.05. Data size 0x90 bytes. Used to verify SKSO integrity.
0x515	N	0x1800	0x1800	Y	N?	second loader	F00d-cmd F01 AES-128-CBC key. Protected on FW 1.05. Data size 0xA0 bytes. Hardcoded IV. Used to encrypt/decrypt SKSO (the content written into keyslots 0x511, 0x512, 0x517 and 0x519).
0x516	N	0x1800	0x1800	Y	?	second loader	F00d-cmd F01 writes (u32)1 here when exporting the infoblk. Set to 0 at the start of second_loader main(). Checked for 0 before initiating communication with Ernie. 4 bytes.
0x517	N	0x1800	0x1800	Y	?	second loader	When initializing the EEPROM, this is zeroed if 0x50D has bit8 clear (on 1.692).
0x518	N	0x1800	0x1800	Y	N	second loader	Another current FW version (3.60+?). Comes from SNVS (Ernie).
0x519	N	0x1800	0x1800	Y	N	second loader	zeroes
0x51A	N	0x1800	0x1800	Y	Y	?	Encrypted Session Key (FW 2.12+). Randomized 0x20 byte key unique every boot/reboot/resume used for kernel coredump encryption. See Sysroot and SCECAF#Kernel_Coredump_Encrypted_ELF.
0x51B	N	0x1800	0x1800	Y	N	second loader	Hardware Info. 4 bytes.
0x51C-0x57F	N	0x1800	0x0000	N	?	?	?
0x580-0x5FF	X	0x0000	0x0000	X	?	?	Not used
0x600	Y	0x1000	0x1000	Y	Y	?	VisibleId of unit
0x601	Y	0x1000	0x1000	Y	Y	?	?
0x602	Y	0x1000	0x1000	Y	Y	?	?
0x603	Y	0x1000	0x1000	Y	N	?	?
0x604	Y	0x1000	0x1000	Y	N	?	?
0x605-0x607	Y	0x1000	0x0000	Y	?	?	?
0x608-0x6FF	X	0x0000	0x0000	X	?	?	Not used
0x700-0x7FF	Y	0x1000	0x0000	Y	N	?	16 public RSA keys for ENC files. Which key is used depends on public key revision specified in ENC header.