Cmep Key Ring Base

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Keyring physical address = 0xE0058000 + 0x20 * keyring_id.

Keyring flags: See upper value (16~31-bit)

Key Rings

Slot Initial flags Flags first Per Console (1.69) Set By Description
0 0x04420001 0x04420003 N Many Secure Modules. General common keyring for crypto operation.
1 0x04420001 0x04420001 ? ? ?
2-7 0x04420001 0x00400001 ? ? ?
8 0x049F0001 0x00810003 Y first_loader SLSK personalization key (encrypt). Derived from keyrings 0x206 or 0x207.
9 0x049F0001 0x00800001 ? first_loader SLSK personalization key (decrypt). Derived from keyrings 0x206 or 0x207.
0xA-0xF 0x049F0001 0x00800003 N first_loader 6 SLSK metadata decryption keys. Derived from keyrings 0x208-0x20D.
0x10 0x05020001 0x05020001 ? ? Supports decryption only.
0x11-0x1F 0x05020001 0x01000001 ? ? ?
0x20 0x061F0001 0x02000003 ? first_loader SLSK HMAC-SHA256 Key. Derived from keyring 0x344.
0x21-0x24 0x061F0001 0x061F0001 ? ? Supports encryption and decryption.
0x25-0x2F 0x061F0001 0x02000001 ? ? ?
0x30-0x34 0x041F0001 0x041F0001 ? ? ?
0x35-0x7F 0x041F0001 0x00000001 ? ? ?
0x80-0xFF 0x00000000 0x00000000 ? N/A Not used.
0x100 0x041F0001 0x041F0001 ? ? ?
0x101-0x17F 0x041F0001 0x00000001 ? ? ?
0x180-0x1FF 0x00000000 0x00000000 ? N/A Not used.
0x200-0x203 0x00020003 0x00000003 ? ? ?
0x204 0x006F0003 0x006F0003 Y Bigmac AES-256 master key for IdStorage Certificates AES-128-ECB keys derivation. Used by KIRK commands 0x10, 0x12, 0x17 and 0x19.
0x205 0x006F0003 0x006F0003 Y Bigmac ?
0x206 0x00AF0003 0x00A00003 ? Bigmac Master key used to derive key used to decrypt personalized layer over SLSK. Should be per-console.
0x207 0x00AF0003 0x00A00003 ? Bigmac Master key used instead of keyring 0x206 when first_loader secret debug mode is set. (Possibly non-per-console?)
0x208-0x20D 0x00AF0003 0x00A00003 N Bigmac 6 master keys used to derive AES-128-CBC Key to decrypt SLSK metadata. Which one is used depends on encryption key revision in SLSK header.
0x20E-0x20F 0xXXXX0003 0x00100003 ? Bigmac Maybe per-console eMMC crypto keys. Protected by second_loader.
0x210-0x211 0x001F0003 0x00000003 ? ? ?
0x212 0x001F0003 0x001F0003 Y Bigmac AES-256-CMAC key used by KIRK commands 0x12 and 0x19.
0x213 0x001F0003 0x001F0003 Y Bigmac AES-256-CBC key used to derive (by seed encryption) SMI keys in second_loader, which are used for minimum firmware version decryption.
0x214 0x001F0003 0x00000003 ? ? AES-256-CBC key used to derive (by seed encryption) keyrings 0x514 and 0x515 in second_loader. IVs and seeds hardcoded in second_loader.
0x215 0x001F0003 0x00000003 ? ? ?
0x216 0x001F0003 0x001F0003 Y Bigmac AES-256-CBC key used to derive (by seed encryption) keyrings 0x502-0x504 in second_loader. IV hardcoded in second_loader. If SMI minimum FW < 0.996, this key is not used and keyrings 0x502-0x504 are set with hardcoded values from second_loader.
0x217 0x001F0003 0x00000003 ? ? ?
0x218-0x2FF 0x00000000 0x00000000 X N/A Not used.
0x300-0x33F 0x00020003 0x00000003 ? ? ?
0x340 0x012F0003 0x012F0003 ? ? Used to decrypt keys into the 0x10 keyring.
0x341-0x343 0x012F0003 0x01200003 ? ? ?
0x344 0x022F0003 0x02200003 ? ? Master key used to derive the 0x20 keyring in first_loader.
0x345-0x348 0x022F0003 0x022F0003 ? ? Used to decrypt keys into one of the 0x21-0x24 keyrings.
0x349-0x353 0x022F0003 0x02200003 ? ? ?
0x354-0x3FF 0x001F0003 0x00000003 ? ? ?
0x400-0x47F 0x18000001 0x00000001 ? ? ?
0x480-0x4FF 0x00000000 0x00000000 X N/A Not used.
0x500 0x18000001 0x18000001 ? ? ?
0x501 0x18000001? 0x10000007 N first_loader Used by first_loader to figure out whether to load from eMMC or ARM comms after reset. Also SLSK AES Key revision on offset>0x1C-byte>bit:0xF0000000
0x502 0x18000001 0x18000003 Y second_loader AES XTS Tweak for Ernie SNVS sectors.
0x503 0x18000001 0x18000003 Y second_loader AES XTS Decryption Key for Ernie SNVS sectors.
0x504 0x18000001 0x18000003 Y second_loader AES-128-CMAC Key for Ernie SNVS sectors.
0x505 0x18000001 0x00000001 ? ? ?
0x506 0x18000001 0x18000003 N second_loader QAF Token AES-256-CBC and AES-256-CMAC key. Hardcoded in second_loader. Used with IV = keyring 0x507.
0x507 0x18000001 0x18000003 N second_loader QAF Token AES-256-CBC IV. Hardcoded in second_loader.
0x508 0x18000001 0x18000003 Y second_loader Ernie version. Comes from Ernie Code Flash memory (Ernie command 1). 4 bytes. If lower (older) than 0x00090903, old Ernie protocols (unencrypted SNVS packets and maybe different SNVS keys) are used.
0x509 0x18000001 0x18000003 Y second_loader ConsoleId of unit. Comes from IdStorage (eMMC).
0x50A 0x18000001? 0x18000007 Y second_loader QA flags. 0x10 bytes. Comes from Ernie NVS (Ernie command 0x1082).
0x50B 0x18000001 0x18000003 Y second_loader Mgmt Data. 8 bytes. Comes from Ernie SNVS block 0 (Ernie command 0xD2).
0x50C 0x18000001 0x18000003 N second_loader Second_Loader#Boot_type_indicator_for_slsk
0x50D 0x18000001 0x18000003 Y second_loader OpenPSID of unit. Comes from IdStorage (eMMC).
0x50E 0x18000001 1.69: 0x18000003

3.60: 0x10000003

Y second_loader Current firmware version. Comes from Ernie SNVS (Ernie command 0xD0).
0x50F 0x18000001 0x18000003 Y second_loader Minimum firmware version. Comes from IdStorage SMI leaf (eMMC). 4 bytes.
0x510 0x18000001 0x18000003 Y second_loader DIP Switches. 0x20 bytes. Comes from CP and Ernie VS (Ernie command 0x90 offset 0xE0).
0x511 0x18000001 0x18000003 N (random) second_loader Ernie communication session key. Unique per boot. It is generated by a handshake with Ernie through Ernie command 0xD0. AES-128-ECB key used to enc/dec the content of Ernie secure packets. If (baryonVersion < 0x90903 && (ernieDLVersion & 0xffffff) < 0x3600) it is zeroed by second_loader. Part of SKSO data. Used by SK command 0xF01.
0x512 0x18000001? 0x18000007 N (counter) second_loader Ernie communication ticket count. Used as a challenge at the start of each secure Ernie encrypted communication, for example for SNVS read/write. On each boot it is set to a random value by second_loader. Incremented by 1 after each Ernie secure commmand usage. Part of SKSO data. Used by SK command 0xF01.
0x513 0x18000001 0x18000003 Y second_loader DRAM size. Set to 0x20000000 by default, 0x40000000 on DevKit in DevKit Memory Size mode. Determined by DIP Switches (CP).
0x514 0x18000001 0x18000003 see keyring 0x214 second_loader SKSO AES-256-CMAC key. Protected on FW 1.05. Data size 0x90 bytes. Used to verify SKSO. Used by SK command 0xF01.
0x515 0x18000001 0x18000003 see keyring 0x214 second_loader SKSO AES-128-CBC key. Protected on FW 1.05. Data size 0xA0 bytes. Hardcoded IV in second_loader and second_kernel. Used to encrypt/decrypt SKSO (the content written into keyrings 0x511, 0x512, 0x517 and 0x519). Used by SK command 0xF01.
0x516 0x18000001? 0x18000007 N second_loader Some status. Set to 0 at the start of second_loader main(). Checked for 0 before initiating communication with Ernie. 4 bytes. Used by SK command 0xF01: writes (u32)1 here after having exported the SKSO to paddr 0x4001FF00.
0x517 0x18000001 0x18000003 Y second_loader, act_sm Kit Activation status. 4 bytes. Part of SKSO data. When initializing the keyrings, this is zeroed if keyring ?0x50D? has bit8 clear (on FW 1.692). Used by SK command 0xF01.
0x518 0x18000001 0x18000003 Y second_loader Another current FW version (3.60+?). Comes from SNVS (Ernie command 0xD0).
0x519 0x18000001 0x18000003 Y? second_loader Part of SKSO data. Used by SK command 0xF01. Not used (maybe zeroed) on old FWs. Used on FW 3.60.
0x51A 0x18000001 0x18000003 N (random) second_loader Coredump Encrypted Session Key (FW 2.12+). Randomized 0x20 byte key. Unique for every boot/reboot/resume. Used for Kernel coredump encryption. See KBL Param and SCECAF#Kernel_Coredump_Encrypted_ELF. Used by SK command 0x1001.
0x51B 0x18000001 0x18000003 Y second_loader Hardware Info. 4 bytes. Comes from Ernie Code Flash memory (Ernie command 5).
0x51C-0x51D 0x18000001 0x00000001 ? ? Used in update_service_sm for NVS. 4 bytes for each keyring.
0x51E-0x521 0x18000001 0x00000001 ? ? Used in update_service_sm for NVS. 4 bytes for each keyring.
0x522-0x57F 0x18000001 0x00000001 ? ? ?
0x580-0x5FF 0x00000000 0x00000000 X N/A Not used.
0x600 0x10000003 0x10000003 Y Bigmac VisibleId of unit.
0x601 0x10000003 0x10000003 Y ? ?
0x602 0x10000003 0x10000003 Y Bigmac 256 bits copied to 0xE0020100 by second_loader.
0x603 0x10000003 0x10000003 N Bigmac SLSK RSA public key has flags
0x604 0x10000003 0x10000003 N ? ?
0x605-0x607 0x10000003 0x00000003 ? ? ?
0x608-0x6FF 0x00000000 0x00000000 X N/A Not used.
0x700-0x7FF 0x10000003 0x00000003 N Bigmac 16 RSA public keys for SLSK files. Which key is used depends on public key revision specified in SLSK header.

Key rings flags on FW 3.60 after kernel boot time

 KeyringId=0x000 Range=0x001 Flags=0x04420003
 KeyringId=0x001 Range=0x001 Flags=0x04420001
 KeyringId=0x002 Range=0x006 Flags=0x00400001
 KeyringId=0x008 Range=0x001 Flags=0x00810003
 KeyringId=0x009 Range=0x001 Flags=0x00800001
 KeyringId=0x00A Range=0x006 Flags=0x00800003
 KeyringId=0x010 Range=0x001 Flags=0x05020001
 KeyringId=0x011 Range=0x00F Flags=0x01000001
 KeyringId=0x020 Range=0x001 Flags=0x02000003
 KeyringId=0x021 Range=0x004 Flags=0x061F0001
 KeyringId=0x025 Range=0x00B Flags=0x02000001
 KeyringId=0x030 Range=0x005 Flags=0x041F0001
 KeyringId=0x035 Range=0x04B Flags=0x00000001
 KeyringId=0x080 Range=0x080 Flags=0x00000000
 KeyringId=0x100 Range=0x001 Flags=0x041F0001
 KeyringId=0x101 Range=0x07F Flags=0x00000001
 KeyringId=0x180 Range=0x080 Flags=0x00000000
 KeyringId=0x200 Range=0x004 Flags=0x00000003
 KeyringId=0x204 Range=0x002 Flags=0x006F0003
 KeyringId=0x206 Range=0x008 Flags=0x00A00003
 KeyringId=0x20E Range=0x002 Flags=0x00100003
 KeyringId=0x210 Range=0x002 Flags=0x00000003
 KeyringId=0x212 Range=0x002 Flags=0x001F0003
 KeyringId=0x214 Range=0x002 Flags=0x00000003
 KeyringId=0x216 Range=0x001 Flags=0x001F0003
 KeyringId=0x217 Range=0x001 Flags=0x00000003
 KeyringId=0x218 Range=0x0E8 Flags=0x00000000
 KeyringId=0x300 Range=0x040 Flags=0x00000003
 KeyringId=0x340 Range=0x001 Flags=0x012F0003
 KeyringId=0x341 Range=0x003 Flags=0x01200003
 KeyringId=0x344 Range=0x001 Flags=0x02200003
 KeyringId=0x345 Range=0x004 Flags=0x022F0003
 KeyringId=0x349 Range=0x00B Flags=0x02200003
 KeyringId=0x354 Range=0x0AC Flags=0x00000003
 KeyringId=0x400 Range=0x080 Flags=0x00000001
 KeyringId=0x480 Range=0x080 Flags=0x00000000
 KeyringId=0x500 Range=0x001 Flags=0x18000001
 KeyringId=0x501 Range=0x001 Flags=0x10000007
 KeyringId=0x502 Range=0x003 Flags=0x18000003
 KeyringId=0x505 Range=0x001 Flags=0x00000001
 KeyringId=0x506 Range=0x004 Flags=0x18000003
 KeyringId=0x50A Range=0x001 Flags=0x18000007
 KeyringId=0x50B Range=0x003 Flags=0x18000003
 KeyringId=0x50E Range=0x001 Flags=0x10000003
 KeyringId=0x50F Range=0x003 Flags=0x18000003
 KeyringId=0x512 Range=0x001 Flags=0x18000007
 KeyringId=0x513 Range=0x003 Flags=0x18000003
 KeyringId=0x516 Range=0x001 Flags=0x18000007
 KeyringId=0x517 Range=0x005 Flags=0x18000003
 KeyringId=0x51C Range=0x064 Flags=0x00000001
 KeyringId=0x580 Range=0x080 Flags=0x00000000
 KeyringId=0x600 Range=0x005 Flags=0x10000003
 KeyringId=0x605 Range=0x003 Flags=0x00000003
 KeyringId=0x608 Range=0x0F8 Flags=0x00000000
 KeyringId=0x700 Range=0x100 Flags=0x00000003
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