Difference between revisions of "Title metadata"
Blooper4912 (talk | contribs) |
(Improve formatting) |
||
| (8 intermediate revisions by 4 users not shown) | |||
| Line 1: | Line 1: | ||
| − | '''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 | + | '''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 ("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 == | ||
| + | |||
=== Header === | === Header === | ||
| + | |||
{| class="wikitable" | {| class="wikitable" | ||
|- style="background-color: #ddd;" | |- style="background-color: #ddd;" | ||
| Line 41: | Line 47: | ||
| 0x183 | | 0x183 | ||
| 1 | | 1 | ||
| − | | Padding modulo | + | | Padding modulo 4 |
|- | |- | ||
| 0x184 | | 0x184 | ||
| 8 | | 8 | ||
| − | | System Version | + | | System Version; probably always 0 |
|- | |- | ||
| 0x18C | | 0x18C | ||
Latest revision as of 05:28, 20 December 2022
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 SHA-1 hashes. The format between Wii and DSi Title metadata appears to be identical; this includes 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.
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 SHA-256 of 03CE2468F00D1AAEA52D7193A2312B0FE87ECE72D43381C3B6BD4C57E700CDD7.
Structure
Header
| Start | Length | Description |
|---|---|---|
| 0x000 | 4 | Signature type |
| 0x004 | 256 | Signature |
| 0x104 | 60 | Padding modulo 64 |
| 0x140 | 64 | Issuer |
| 0x180 | 1 | Version |
| 0x181 | 1 | ca_crl_version |
| 0x182 | 1 | signer_crl_version |
| 0x183 | 1 | Padding modulo 4 |
| 0x184 | 8 | System Version; probably always 0 |
| 0x18C | 8 | Title ID |
| 0x194 | 4 | Title type |
| 0x198 | 2 | Group ID |
| 0x19A | 62 | reserved |
| 0x1D8 | 4 | Access rights |
| 0x1DC | 2 | Title version |
| 0x1DE | 2 | Number of contents (nbr_cont) |
| 0x1E0 | 2 | boot index |
| 0x1E2 | 2 | Padding modulo 64 |
| 0x1E4 | 36*nbr_cont | Contents |
Content
| Start | Length | Description |
|---|---|---|
| 0x00 | 4 | Content ID |
| 0x04 | 2 | Index |
| 0x06 | 2 | Type |
| 0x08 | 8 | Size |
| 0x10 | 20 | SHA1 hash |
Certificates
| Start | Length | Description |
|---|---|---|
| 0x000 | 4 | Signature type |
| 0x004 | 256 | Signature |
| 0x104 | 32 | Issuer |
| 0x124 | 4 | Tag |
| 0x128 | 64 | Name |
| 0x168 | Key |