FRDU:GetMyApproachContext
Request[edit]
| Index Word | Description | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0 |
|
Request Static Buffers[edit]
The handler for this IPC command expects the following 0x100-bytes after the beginning of the above command buffer:
| Index Word | Description
|
|---|---|
| 0 | Descriptor for static buffer (id 0) |
| 1 | Output encrypted ApproachContext payload buffer |
Response[edit]
| Index Word | Description | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0 |
| ||||||||
| 1 | Result code | ||||||||
| 2 | Descriptor for static buffer (id 0) | ||||||||
| 3 | Output encrypted ApproachContext payload buffer |
Description[edit]
Creates an encrypted payload containing information that can be used to add this console as a friend locally. (See Approach Contexts for details)
First, the 0x1E0-sized ApproachContext structure is created and user's personal Mii is encrypted using APT:Wrap. If the user doesn't have a personal Mii yet, the 0x70-sized field in the approach context is set to all zeros.
The populated structure is then encrypted with AES-CCM using PS:EncryptSignDecryptVerifyAesCcm and keytype 8 (Keyslot 0x36), the nonce being the concatenated little-endian Principal ID and Friend Code of the console (total nonce size 12). The nonce is returned in plaintext at offset 0x4-0x10. Note that the ApproachContext is located at 0x10 and that is where the actually encrypted section begins. In other words, the AES-CCM encrypted section is located at offset 0x10 thru 0x1F0.