Mii Maker: Difference between revisions

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3DS Mii QR is a standard 57x57 pixel Level 10 High ECC QR code with 'Mii' logo in center (refer to [http://www.denso-wave.com/qrcode 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 [[APT:Unwrap|Unwrap]] command, the Mii Maker application uses ~~blocksize~~=12, noncesize=10, and inputbuffer-size=0x60. ~~The first~~ 8-bytes~~(cleartext MiiID+MAC address) in the below Mii data is the nonce used with the NS~~ Unwrap~~/Wrap commands~~, the rest of the data at 0x8-0x5F is encrypted.

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 [[APT:Unwrap|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 [[APT:Wrap|Wrap]] and [[APT:Unwrap|Unwrap]] for more information)

{| class="wikitable"

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|-

| 0x8

| ~~0x1~~

| 0x4

| ~~Unknown~~, the encrypted data begins here.

| [[Mii#Mii_ID|Mii ID]], the encrypted data begins here.

|-

| 0xC

| 0x8

| System ID

|-

| ~~0x9~~

| 0x14

| ~~0x1~~

| 0x2

| ~~Allow Copying~~

| Low 2 octets of MAC address

|-

| ~~0xA~~

| 0x16

| ~~0xE~~

| 0x2

| ~~unknown~~

| padding (0000)

|-

| 0x18

@@ Line 11: / Line 11: @@
 DS Mii QR is a standard 57x57 pixel Level 10 High ECC QR code with 'Mii' logo in center (refer to [http://www.denso-wave.com/qrcode 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 [[APT:Unwrap|Unwrap]] command, the Mii Maker application uses blocksize=12, noncesize=10, and inputbuffer-size=0x60. The first 8-bytes(cleartext MiiID+MAC address) in the below Mii data is the nonce used with the NS Unwrap/Wrap commands, the rest of the data at 0x8-0x5F is encrypted.
+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 [[APT:Unwrap|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 [[APT:Wrap|Wrap]] and [[APT:Unwrap|Unwrap]] for more information)
 {| class="wikitable"
@@ Line 28: / Line 28: @@
 |-
 | 0x8
-| 0x1
+| 0x4
-| Unknown, the encrypted data begins here.
+| [[Mii#Mii_ID|Mii ID]], the encrypted data begins here.
+|-
+| 0xC
+| 0x8
+| System ID
 |-
-| 0x9
+| 0x14
-| 0x1
+| 0x2
-| Allow Copying
+| Low 2 octets of MAC address
 |-
-| 0xA
+| 0x16
-| 0xE
+| 0x2
-| unknown
+| padding (0000)
 |-
 | 0x18