Difference between revisions of "PSPXI:EncryptDecryptAes"

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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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| Algorithm Type (0..4)
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| u8 Algorithm Type (0..5)
 
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| 7
 
| 7
| Key Type (0..7)
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| u8 Key Type (0..7)
 
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|-
 
|-
 
| 2-5
 
| 2-5
| MAC (?)
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| Output IV / CTR: this is the IV/CTR which would be used if the crypto operation were to continue.
 
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|}
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==Algorithm Types==
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{| class="wikitable" border="1"
 +
|-
 +
!  Type
 +
!  Description
 +
|-
 +
| 0
 +
| CBC Encrypt
 +
|-
 +
| 1
 +
| CBC Decrypt
 +
|-
 +
| 2
 +
| CTR Encrypt
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|-
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| 3
 +
| CTR Decrypt
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|-
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| 4
 +
| CCM Encrypt
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|-
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| 5
 +
| CCM Decrypt
 +
|}
 +
 +
==Key Types==
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{| class="wikitable" border="1"
 +
|-
 +
!  Type
 +
!  [[AES]] Engine Keyslot
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!  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.
 +
|-
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| 2
 +
| 0x31
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| 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.
 +
|-
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| 3
 +
| 0x38
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| [[SpotPass|BOSS]]
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|-
 +
| 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.
 +
|-
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| 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
 +
| This is used by the friends module.
 +
 +
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.

Latest revision as of 07:40, 9 April 2016

Request[edit]

Index Word Description
0 Header code [0x000401C4]
1 Size in bytes
2-5 IV / CTR
6 u8 Algorithm Type (0..5)
7 u8 Key Type (0..7)
8 (size<<8) | 0x4
9 Source pointer
10 (size<<8) | 0x14
11 Destination pointer

Response[edit]

Index Word Description
0 Header code [0x00040140]
1 Result code
2-5 Output IV / CTR: this is the IV/CTR which would be used if the crypto operation were to continue.

Algorithm Types[edit]

Type Description
0 CBC Encrypt
1 CBC Decrypt
2 CTR Encrypt
3 CTR Decrypt
4 CCM Encrypt
5 CCM Decrypt

Key Types[edit]

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 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 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::CEC commands, when beginning StreetPass communications.
7 Invalid
8 0x36 This is used by the friends module.

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-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[edit]

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.