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'''Title metadata''', or '''TMD''' for short, is a format used to store information about a title (DSiWare, etc.) and all its installed contents, including which contents they consist of and their SHA1 hashes. The format between Wii and DSi Title metadata ''appears'' to be identical.
'''Title metadata''', or '''TMD''' for short, is a format used to store information about a title ([[DSiWare]], etc.) and all its installed contents, including which contents they consist of and their {{Wikipedia|SHA-1}} hashes. The format between Wii and DSi Title metadata ''appears'' to be identical; this includes {{Wikipedia|endianness}}, so byteswaps are often needed on the DSi.
Many operations are done in terms of 64-byte blocks, which means you will often see padding out to the nearest 64-byte boundary at the end of a field.
Many operations are done in terms of 64-byte blocks, which means you will often see padding out to the nearest 64-byte boundary at the end of a field.
Example of a Nintendo DSi TMD : http://nus.cdn.t.shop.nintendowifi.net/ccs/download/0003000f484e4c4a/tmd
Example of a Nintendo DSi TMD: http://nus.cdn.t.shop.nintendowifi.net/ccs/download/0003000f484e4c4a/tmd ("HNLJ", or Japanese [[Version Data]].)
The certificate chain at the end of the file seems to always/usually have a size in bytes of 1,792 and a {{Wikipedia|SHA-256}} of <code>03CE2468F00D1AAEA52D7193A2312B0FE87ECE72D43381C3B6BD4C57E700CDD7</code>.
== Structure ==
== Structure ==
| 0x183
| 0x183
| 1
| 1
| Padding modulo 64
| Padding modulo 4
|-
|-
| 0x184
| 0x184
| 8
| 8
| System Version
| System Version; probably always 0
|-
|-
| 0x18C
| 0x18C