PSPXI:EncryptDecryptAes: Difference between revisions
Jump to navigation
Jump to search
TimmSkiller (talk | contribs) No edit summary |
|||
| (10 intermediate revisions by 2 users not shown) | |||
| Line 46: | Line 46: | ||
|- | |- | ||
| 2-5 | | 2-5 | ||
| | | Output IV / CTR: this is the IV/CTR which would be used if the crypto operation were to continue. | ||
|} | |} | ||
==Algorithm Types== | ==Algorithm Types== | ||
| Line 106: | Line 103: | ||
| 5 | | 5 | ||
| 0x39 | | 0x39 | ||
| This is used by the [[Download Play]] module. | | 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 | | 6 | ||
| 0x2E | | 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. | | 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= | =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. | 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 14:36, 18 December 2024
Request
| 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
| 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
| Type | Description |
|---|---|
| 0 | CBC Encrypt |
| 1 | CBC Decrypt |
| 2 | CTR Encrypt |
| 3 | CTR Decrypt |
| 4 | CCM Encrypt |
| 5 | CCM Decrypt |
Key Types
| 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 | Used by the the friends module for 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-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.