SPL ("Secure Platform services") is responsible for handling all cryptographic operations within the system and relaying them to the Secure Monitor when necessary.
During [1.0.0-3.0.2], the only existing services were "csrng" and "spl:". However, in [4.0.0+] the "spl:" service was refactored and split into new services with different permission levels. Each service exposes the IPC command list differently in order to prevent cryptographic operations to take place in the wrong context.
csrng
This is "nn::spl::detail::IRandomInterface".
| Cmd | Name |
|---|---|
| 0 | #GenerateRandomBytes |
GenerateRandomBytes
Takes a type-6 buffer and fills it with random data from GetRandomBytes SMC. Same command for "spl:" and "csrng" services.
spl:, spl:mig, spl:fs, spl:ssl, spl:es, spl:manu
These are "nn::spl::detail::IGeneralInterface", "nn::spl::detail::ICryptoInterface", "nn::spl::detail::IFsInterface", "nn::spl::detail::ISslInterface", "nn::spl::detail::IEsInterface" and "nn::spl::detail::IManuInterface".
[2.0.0+] Where previously only one AES keyslot was used, there is now support for 4 of them.
[2.0.0+] When the session closes, all allocated AES keyslots are automatically freed.
| Cmd | Name | Permissions |
|---|---|---|
| 0 | #GetConfig | spl:, spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 1 | #ExpMod | spl:, spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 2 | #GenerateAesKek | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 3 | #LoadAesKey | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 4 | #GenerateAesKey | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 5 | #SetConfig | spl:, spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 7 | #GenerateRandomBytes | spl:, spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 9 | #ImportLotusKey | spl:fs |
| 10 | #DecryptLotusMessage | spl:fs |
| 11 | #IsDevelopment | spl:, spl:mig, spl:fs, spl:ssl spl:es, spl:manu |
| 12 | #GenerateSpecificAesKey | spl:fs |
| 13 | #DecryptRsaPrivateKey | spl:ssl, spl:es, spl:manu |
| 14 | #DecryptAesKey | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 15 | #CryptAesCtr | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 16 | #ComputeCmac | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 17 | #ImportEsKey | spl:es |
| 18 | #UnwrapTitleKey | spl:es |
| 19 | #LoadTitleKey | spl:fs |
| 20 | [2.0.0+] #UnwrapCommonTitleKey | spl:es |
| 21 | [2.0.0+] #AllocateAesKeyslot | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 22 | [2.0.0+] #FreeAesKeyslot | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 23 | [2.0.0+] #GetAesKeyslotAvailableEvent | spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 24 | [3.0.0+] #SetBootReason | spl:, spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 25 | [3.0.0+] #GetBootReason | spl:, spl:mig, spl:fs, spl:ssl, spl:es, spl:manu |
| 26 | [5.0.0+] ImportSslKey | spl:ssl |
| 27 | [5.0.0+] SslExpMod | spl:ssl |
| 28 | [5.0.0+] ImportDrmKey | spl:es |
| 29 | [5.0.0+] DrmExpMod | spl:es |
| 30 | [5.0.0+] ReEncryptRsaPrivateKey | spl:manu |
| 31 | [5.0.0+] GetPackage2Hash | spl:fs |
| 31 | [6.0.0+] UnwrapElicenseKey | spl:es |
| 32 | [6.0.0+] #LoadElicenseKey | spl:es |
GetConfig
Wrapper for GetConfig SMC.
Takes a u32 (ConfigItem), and returns one or more u64s (ConfigVal).
ExpMod
Wrapper for ExpMod SMC.
Takes one type-10 (C descriptor) buffer (data_out_buf) and 3 type-9 (X descriptor) buffers (data_in_buf, exp_in_buf and mod_in_buf).
Performs asymmetric crypto with user supplied modulus and exponent.
GenerateAesKek
Wrapper for GenerateAesKek SMC.
Takes a 16-byte EKS (Encryption Key Source) and two words (KeyGeneration and option) as input.
Returns a scrambled sealed KEK (Key Encryption Key used as key_x).
LoadAesKey
Wrapper for LoadAesKey SMC.
Takes a u32 (keyslot) and two 16-byte keys (key_x and key_y).
Sets the specified keyslot with a key generated from key_x and key_y.
[2.0.0+] Now verifies that the keyslot in use (0..3) is allocated by the current spl session, otherwise errors with 0xD21A. Previously, keyslot was hardcoded to 0.
GenerateAesKey
Takes a 16-byte KEK (key_x) and a 16-byte encrypted key (enc_key).
Generates a new key by decrypting (AES-ECB) enc_key with a key generated from the supplied key_x and a fixed key_y set with LoadAesKey SMC.
[2.0.0+] Previously, it always used keyslot 0. Now it tries to allocate a keyslot to be used and returns 0xD01A if they're all busy. When the command is done, the keyslot is released.
SetConfig
Wrapper for SetConfig SMC.
Takes a u32 (ConfigItem) and a u64 (ConfigVal).
| ConfigItem | Name |
|---|---|
| 13 | IsChargerHiZModeEnabled |
Any other ConfigItem, besides 13, can't be set.
ImportLotusKey
Wrapper for ImportLotusKey SMC.
Takes one type-9 (X descriptor) buffer (enc_privk_in_buf), a 16-byte KEK (key_x), a 16-byte key (key_y) and a u32 (version). version is 0 for normal keys or 1 for extended keys.
Decrypts enc_privk_in_buf with a key generated from key_x and key_y and imports it for later usage.
[5.0.0+] This now calls ReEncryptRsaPrivateKey SMC instead.
DecryptLotusMessage
Takes 3 type-9 (X descriptor) buffers (data_in_buf, mod_in_buf and label_hash_in_buf).
Uses SecureExpMod SMC to decrypt data_in_buf using the private key imported with #ImportLotusKey and the supplied mod_in_buf and label_hash_in_buf.
IsDevelopment
No input params.
Uses #GetConfig internally with id=6. Returns true if output from that is 0, or if the SMC returned error 2.
Returns an u8 flag for whether the system is devunit. Output flag is 0 on retail.
GenerateSpecificAesKey
Wrapper for GenerateSpecificAesKey SMC.
Takes a 16-byte seed (key_seed) and two words (KeyGeneration and option) as input.
Returns a scrambled key (key_a).
DecryptRsaPrivateKey
Wrapper for DecryptRsaPrivateKey SMC.
Takes one type-10 (C descriptor) buffer (dec_privk_out_buf), one type-9 (X descriptor) buffer (enc_privk_in_buf), a 16-byte KEK (key_x), a 16-byte key (key_y) and a u32 (version). version is 0 for normal keys or 1 for extended keys.
Decrypts enc_privk_in_buf into dec_privk_out_buf with a key generated from key_x and key_y.
Used by SSL-sysmodule for TLS client-privk.
[5.0.0+] This now calls DecryptOrImportRsaPrivateKey SMC instead.
DecryptAesKey
Takes a 16-byte encrypted key (enc_key) and two words (KeyGeneration and option) as input.
Decrypts (AES-ECB) enc_key with a key generated from fixed key_x and key_y set with LoadAesKey SMC and returns a 16-byte decrypted key (dec_key).
[2.0.0+] Introduced same keyslot allocation code as for #GenerateAesKey.
CryptAesCtr
Takes a type-0x46 (B descriptor) buffer (data_out_buf), a u32 (keyslot), a type-0x45 (A descriptor) buffer (data_in_buf) and a 16-byte CTR (aes_ctr).
Uses ComputeAes SMC to decrypt data_in_buf into data_out_buf, using the key set in the specified keyslot.
[2.0.0+] Verifies the keyslot was allocated in the current session.
ComputeCmac
Wrapper for ComputeCmac SMC.
Takes one type-9 (X descriptor) buffer (data_in_buf) and a u32 (type?).
Returns a 16-byte CMAC calculated over data_in_buf.
[2.0.0+] Verifies the keyslot was allocated in the current session.
ImportEsKey
Wrapper for ImportEsKey SMC.
Takes one type-9 (X descriptor) buffer (enc_privk_in_buf), a 16-byte KEK (key_x), a 16-byte key (key_y) and a u32 (version). version is 0 for normal keys or 1 for extended keys.
Decrypts enc_privk_in_buf with a key generated from key_x and key_y and imports it for later usage.
[5.0.0+] This now calls ReEncryptRsaPrivateKey SMC instead.
UnwrapTitleKey
Wrapper for UnwrapTitleKey SMC.
Takes one type-10 (C descriptor) buffer (data_out_buf) and 3 type-9 (X descriptor) buffers (data_in_buf, mod_in_buf and label_hash_in_buf).
Decrypts data_in_buf into data_out_buf using the private key imported with #ImportEsKey and the supplied mod_in_buf. Afterwards, verifies RSA-OAEP encoding using label_hash_in_buf.
Returns an u32 (dec_data_size).
LoadTitleKey
Wrapper for LoadTitleKey SMC.
Takes a u32 (keyslot) and a 16-byte sealed titlekey.
Sets the specified keyslot with the titlekey.
[2.0.0+] Verifies the keyslot was allocated in the current session.
UnwrapCommonTitleKey
Wrapper for UnwrapCommonTitleKey SMC.
Takes a 16-byte EKS (Encryption Key Source).
Returns a sealed titlekey.
AllocateAesKeyslot
Returns an allocated keyslot, or 0xD01A if all keyslots are taken. You need to allocate a keyslot before using AES functions.
FreeAesKeyslot
Takes a single u32 and frees the keyslot. The keyslot must have been allocated by current session otherwise 0xD21A will be returned.
GetAesKeyslotAvailableEvent
Returns an event handle for synchronizing with the AES keyslots.
SetBootReason
Sets a static dword in spl .bss to the input u32 BootReason.
[4.0.0+] returns 0xD41A if a value has been previously set without being gotten.
GetBootReason
Returns the static dword BootReason in spl .bss that can be set via #SetBootReason.
[4.0.0+] returns 0xD61A if a value has not previously been set, and unsets the value after getting it.
LoadElicenseKey
Same as LoadTitleKey.