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==Checksum==
==Checksum==


The algorithm used to verify the integrity of the database is based on [http://srecord.sourceforge.net/crc16-ccitt.html CRC16-CCITT], though it's an incorrect implementation. It is the same algorithm used to verify [http://wiibrew.org/wiki/Mii_Data#Block_format Mii Data on the Wii].
The algorithm used to verify the integrity of the database is based on CRC-16/XMODEM. It is the same algorithm used to verify [http://wiibrew.org/wiki/Mii_Data#Block_format Mii Data on the Wii].


To obtain the correct value for the checksum, apply the algorithm to the first 0xC81E bytes of the database. This can be done using [https://gbatemp.net/threads/tutorial-give-your-mii-gold-pants-and-use-it-for-streetpass.379146/page-24#post-6569186 FixCRC]; alternativly a pseudocode implementation of the checksum algorithm is given below:
To obtain the correct value for the checksum, apply the algorithm to the first 0xC81E bytes of the database. This can be done using [https://gbatemp.net/threads/tutorial-give-your-mii-gold-pants-and-use-it-for-streetpass.379146/page-24#post-6569186 FixCRC]; alternativly a pseudocode implementation of the checksum algorithm is given below:
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<source lang="python">
<source lang="python">
def crc16_CCITTWii(u8[]: data) -> u16:
def crc16_CCITTWii(u8[]: data) -> u16:
     """Calculate a checksum of data using the CRC16-CCITT implementation of the Wii
     """Calculate a checksum of data using the CRC-16/XMODEM implementation


     This implementation uses 0x0000 as the starting value, which is different
     CRC-16/XMODEM implementation uses 0x0000 as the starting value
    from what CRC16-CCITT specifies.
     """
     """
 
      
     # note: a correct implementation of CRC16-CCITT
    #      would initialize this to 0xffff
     u32 crc := 0x0
     u32 crc := 0x0


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| 0xC
| 0xC
| 0x4
| 0x4
| Mii ID (big-endian 32bit unsigned integer):<br/>Bit 0..27: (bit[0..27] * 2) = date of creation (seconds since 01/01/2010 00:00:00)<br/>Bit 28: Always set?<br/>Bit 29: set for temporary Mii<br/>Bit 30: Set for DSi mii?<br/>Bit 31: not set iff Mii is special
| Mii ID (big-endian 32bit unsigned integer):<br/>Bit 0..27: (bit[0..27] * 2) = date of creation (seconds since 01/01/2010 00:00:00)<br/>Bit 28: Always set?<br/>Bit 29: set for temporary Mii<br/>Bit 30: Set for DSi mii?<br/>Bit 31: not set if Mii is special
|-
|-
| 0x10
| 0x10
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| 0x14
| 0x14
| UTF-16 Author Name (10 chars max, 0000 terminated)
| UTF-16 Author Name (10 chars max, 0000 terminated)
|}
== CFLStoreData ==
This is a common Mii container object, used in games and system modules like [[Friend_Services|FRD]] and [[ACT_Services|ACT]].
{| class="wikitable" border="1"
|-
! Offset !! Size !! Description
|-
| 0x0 || 0x5C || Base Mii data in the above format
|-
| 0x5C || 0x2 || padding, left as zeros usually
|-
| 0x5E || 0x2 || CRC16 over the previous 0x5E of data
|}
|}


Retrieved from "https://www.3dbrew.org/wiki/Mii"