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PSPXI:EncryptDecryptAes: Difference between revisions

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Created page with "=Request= {| class="wikitable" border="1" |- ! Index Word ! Description |- | 0 | Header code [0x000401C4] |- | 1 | Size in bytes |- | 2-5 | IV / CTR |- | 6 | Algorithm Type (0...."
 
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|-
|-
| 6
| 6
| Algorithm Type (0..4)
| u8 Algorithm Type (0..5)
|-
|-
| 7
| 7
| Key Type (0..7)
| u8 Key Type (0..7)
|-
|-
| 8
| 8
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|-
|-
| 2-5
| 2-5
| MAC (?)
| Output IV / CTR: this is the IV/CTR which would be used if the crypto operation were to continue.
|}
|}
==Algorithm Types==
{| class="wikitable" border="1"
|-
!  Type
!  Description
|-
| 0
| CBC Encrypt
|-
| 1
| CBC Decrypt
|-
| 2
| CTR Encrypt
|-
| 3
| CTR Decrypt
|-
| 4
| CCM Encrypt
|-
| 5
| CCM Decrypt
|}
==Key Types==
{| class="wikitable" border="1"
|-
!  Type
!  [[AES]] Engine Keyslot
!  Description
|-
| 0
| 0x0D
| Used to decrypt the SSL client cert/private-key stored in [[ClCertA]].
|-
| 1
| 0x2D
| Used to generate the UDS [[NWM_Services|local-WLAN]] CCMP key.
|-
| 2
| 0x31
| This is used by [[NS]] for the APT AES-CCM Wrap/Unwrap commands. These two NS commands are used by the [[Mii Maker]] application for the encrypted Mii data in the Mii QR codes.
|-
| 3
| 0x38
| [[SpotPass|BOSS]]
|-
| 4
| 0x32
| ?
|-
| 5
| 0x39
| This is used by the [[Download Play]] module for calculating a 32bit checksum over the entire UDS application data-fames, stored in the DLP data-frame header.
|-
| 6
| 0x2E
| This is used by the [[StreetPass]] CECD module to generate the CCMP key passed to [[NWM_Services|nwm::CEC]] commands, when beginning StreetPass communications.
|-
| 7
|
| Invalid
|-
| 8
| 0x36
| Used by the [[Friend_Services|the friends module]] for [[Friend_Services#Approach_Contexts|ApproachContext]] encryption. See [[FRDU:GetMyApproachContext]].
Support for this keytype was added with the NATIVE_FIRM updated with [[2.2.0-X]]. When the running NATIVE_FIRM doesn't support this keytype, the result is the same as using keytype7.
|-
| 9
| 0x39
| This is used by the NFC module.
Support for this keytype was added with the NATIVE_FIRM updated with [[9.3.0-21|9.3.0-X]]. When the running NATIVE_FIRM doesn't support this keytype, the result is the same as using keytype7. Before selecting this keyslot, Process9 writes a keyY from the Process9 .(ro)data section(keydata is different for retail/dev units) to this keyslot. Once finished with crypto, Process9 restores the original keyY to this keyslot.
|-
| >=10
|
| Invalid, same as keytype7.
|}
=Description=
This is used to encrypt/decrypt data via the [[AES]] engine. AES-CCM is not supported by this command, [[PSPXI:EncryptSignDecryptVerifyAesCcm]] must be used for AES-CCM instead.
Retrieved from "https://www.3dbrew.org/wiki/PSPXI:EncryptDecryptAes"