Mii Maker
Mii Maker lets you create Miis, and is the successor of the Wii's Mii Channel.
It can transfer Miis over local wireless from other systems running Mii Maker (3DS/Wii U), or receive, but not send, from Mii Channel.
Wii Mii Channel transfer protocol
The Wii beacons are similar to the usual multi-cart NDS beacons, except: beacon_type is zero, and payload size is 0x14. The payload data is just the Wii UTF-16 nickname, with some extra unused zero data. The usual multi-cast NDS protocol is used for sending the 3DS nick to the Wii. After many keep-alive frames, it eventually sends a bunch of frames, each containing the whole Mii. There's a 6-byte header, followed by Mii data. At the end of these frames like most NDS frames is the 0200 byte marker.
Mii QR Code format
3DS Mii QR is a standard 57x57 pixel Level 10 High ECC QR code with 'Mii' logo in center (refer to Denso-Wave Inc web site for QR Code format specifications). It contains 0x70-bytes of binary data. 3DS seems to have a fully implemented QR-code decoder, as it can interpret such Mii binary data being encoded even in the smallest possible for that data size Level 6 Low ECC QR code.
The data itself is encrypted with AES-CCM, xorpads can be determined from known plaintext here. The Mii Maker application uses the NS APT Wrap/Unwrap commands to encrypt/decrypt this Mii data. For the NS Unwrap command, the Mii Maker application uses nonceoffset=12, noncesize=10, and inputbuffer-size=0x60. Note that the actual nonce size is 8 bytes due to Wrap/Unwrap implementation, and the nonce data should be moved 12 bytes afterwards after decryption. The rest of the data at 0x8-0x5F is encrypted, and should be split into two parts after decryption, with the nonce data in the middle. (See Wrap and Unwrap for more information)
| Offset | Length | |
|---|---|---|
| 0x0 | 0x4 | Mii ID (big-endian 32-bit unsigned integer) The most significant 3 bits determine whether the Mii is Special, Foreign, or Normal [1] time_offset = (mii_id & 0x0FFFFFFF) * 2; time_offset is the time the Mii was created, represented as the number of seconds since 01/01/2010 00:00:00 |
| 0x4 | 0x4 | High 4 octets of MAC address [2] |
| 0x8 | 0x4 | Mii ID, the encrypted data begins here. |
| 0xC | 0x8 | System ID (this ID is produced by the output from GenHashConsoleUnique(0x0)) |
| 0x14 | 0x2 | Low 2 octets of MAC address |
| 0x16 | 0x2 | padding (0000) |
| 0x18 | 0x2 | Bit-mapped: Birthday (4bit-day,5bit-month), Sex, Shirt, ?? |
| 0x1A | 0x14 | UTF-16 Mii Name (10 chars max) |
| 0x2E | 0x2 | width & height |
| 0x30 | 0x1 | bit 0: disable sharing bit 1-4: face shape bit 5-7: skin color |
| 0x31 | 0x1 | bit 0-3: wrinkles bit 4-7: makeup |
| 0x32 | 0x1 | hair style |
| 0x33 | 0x1 | bit 0-2: hair color bit 3: flip hair |
| 0x34 | 0x4 | unknown |
| 0x38 | 0x1 | bit 0-4: eyebrow style bit 5-7: eyebrow color |
| 0x39 | 0x1 | bit 0-3: eyebrow scale bit 4-6: eyebrow yscale |
| 0x3A | 0x2 | note that the bytes are swapped over (little-endian layout) bit 0-3: eyebrow rotation bit 5-8: eyebrow x spacing bit 9-13: eyebrow y position |
| 0x3C | 0x1 | Allow Copying |
| 0x3D | 0x3 | unknown |
| 0x40 | 0x1 | Mii Sharing Value |
| 0x41 | 0x7 | unknown |
| 0x48 | 0x14 | UTF-16 Author Name (10 chars max) |
| 0x5C | 0x2 | unknown |
| 0x5E | 0x2 | CRC16 over the previous 0x5E |
| 0x60 | 0x10 | AES-CCM MAC |
- QR codes made from the same 3DS for the same Mii are use the same AES-CCM nonce (you can recreate the xorpad by xoring with known values from this table).
Mii Database
Created, received, or even met-in-multiplayer Miis are saved in CFL_DB.dat.
Savedata
editSaveData.bin
| Offset | Length | |
|---|---|---|
| 0x0 | 0x4 | "TIDE" header (EDIT byteswapped) |
| 0x4 | 0x4 | zero |
| 0xC | 0x4 (?) | 01000000 (constant?) |
| 0x100 | 0x4 | Number of scanned Special Mii QRs |
| 0x104 | - | Some data identifying each scanned Special Mii QRs, for the purpose of not making them scannable again. 8 or 12 byte each? |
| 0x2904 | 0x4 | Checksum? |
ExtData
The ExtData File System for Mii Maker is as follows:
root
├── icon
├── boss
└── user
└── ExBanner
└── COMMON.bin
| File | Details | Size | FW Introduced | Plaintext |
|---|---|---|---|---|
| icon | Duplicate from Application ExeFS. Always image 00000002. | 0x36c0 Bytes | 1.0.0-0 | Download |
| COMMON.bin | Extended Banner for Home Menu. Always image 00000003. | 0x20224 Bytes | 1.0.0-0 | Download |