PSPXI:EncryptDecryptAes

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	MAC

MAC

For CBC mode, the output MAC is the last 16-bytes of the ciphertext. For the other modes, this field is the same as the input IV/CTR.

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.
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	Unknown, 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		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.