Difference between revisions of "CNMT"
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Revision as of 17:09, 22 May 2019
This is the metadata file that ends in ".cnmt{.nca}" or "meta0.ncd". This seems to replace the TMD format.
There's at least 9 different filenames used for ".cnmt":
- "Application_{lower-case hex titleID}.cnmt"
- "Patch_{lower-case hex titleID}.cnmt"
- "AddOnContent_{lower-case hex titleID}.cnmt"
- "SystemUpdate_{hex titleID}.cnmt"
- "SystemData_{lower-case hex titleID}.cnmt"
- "SystemProgram_{lower-case hex titleID}.cnmt"
- "BootImagePackage_{lower-case hex titleID}.cnmt"
- "BootImagePackageSafe_{lower-case hex titleID}.cnmt"
- "Delta_{lower-case hex titleID}.cnmt"
Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Title ID |
| 0x8 | 0x4 | Version |
| 0xC | 0x1 | Meta Type |
| 0xD | 0x1 | Unused |
| 0xE | 0x2 | Extended Header Size |
| 0x10 | 0x2 | Content Count |
| 0x12 | 0x2 | Content Meta Count |
| 0x14 | 0x1 | Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless) |
| 0x15 | 0x3 | Unused |
| 0x18 | 0x4 | Required Download System Version |
| 0x1C | 0x4 | Unused |
SystemUpdate Extended Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | Extended Data Size |
Application Extended Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Patch ID |
| 0x8 | 0x4 | Required System Version |
| 0xC | 0x4 | Unused |
Patch Extended Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Application ID |
| 0x8 | 0x4 | Required System Version |
| 0xC | 0x4 | Extended Data Size |
| 0x10 | 0x8 | Unused |
AddOnContent Extended Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Application ID |
| 0x8 | 0x4 | Required Application Version |
| 0xC | 0x4 | Unused |
Delta Extended Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Application ID |
| 0x8 | 0x4 | Extended Data Size |
| 0xC | 0x4 | Unused |
Content Records
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x20 | Hash |
| 0x20 | 0x10 | Content ID |
| 0x30 | 0x6 | Size |
| 0x36 | 0x1 | Content Type (0=Meta, 1=Program, 2=Data, 3=Control, 4=HtmlDocument, 5=LegalInformation, 6=DeltaFragment) |
| 0x37 | 0x1 | Id Offset |
Content Meta Records
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Title ID |
| 0x8 | 0x4 | Version |
| 0xC | 0x1 | Meta Type |
| 0xD | 0x1 | Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless) |
| 0xE | 0x2 | Unused |
This is used for SystemUpdate, see here: NCM_services#ReadEntryMetaRecords.
SystemUpdate Extended Data
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | Version |
| 0x4 | 0x4 | Variation Count |
| 0x8 | 0x4 | Firmware Variation |
| 0xC | 0x1C * Variation Count | Unused |
Patch Extended Data
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | History Count |
| 0x4 | 0x4 | Delta History Count |
| 0x8 | 0x4 | Delta Count |
| 0xC | 0x4 | Fragment Set Count |
| 0x10 | 0x4 | History Content Count |
| 0x14 | 0x4 | Delta Content Count |
| 0x18 | 0x4 | Unused |
| 0x1C | 0x38 * History Count | History Headers |
| 0x28 * Delta History Count | Delta Histories | |
| 0x28 * Delta Count | Delta Headers | |
| 0x34 * Fragment Set Count | Fragment Sets | |
| 0x18 * History Content Count | History Content Records (Content Records without the Hash entry) | |
| 0x38 * Delta Content Count | Delta Content Records | |
| 0x4 * Fragment Indicator Count (Fragment Set) | Fragment Indicators |
History Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x10 | Content Meta Record |
| 0xC | 0x1 | Meta Type |
| 0xD | 0x1 | Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless) |
| 0xE | 0x2 | Unused |
| 0x10 | 0x20 | Digest |
| 0x30 | 0x2 | Content Info Count |
| 0x32 | 0x6 | Unused |
Delta History
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Source Patch ID |
| 0x8 | 0x8 | Destination Patch ID |
| 0x10 | 0x4 | Source Version |
| 0x14 | 0x4 | Destination Version |
| 0x18 | 0x8 | Download Size |
| 0x20 | 0x8 | Unused |
Delta Header
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Source Patch ID |
| 0x8 | 8 | Destination Patch ID |
| 0x10 | 0x4 | Source Version |
| 0x14 | 0x4 | Destination Version |
| 0x18 | 0x2 | Fragment Set Count |
| 0x1A | 0x6 | Unused |
| 0x20 | 0x2 | Content Info Count |
| 0x22 | 0x6 | Unused |
Fragment Set
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x10 | Source Content ID |
| 0x10 | 0x10 | Destination Content ID |
| 0x20 | 0x6 | Source Size |
| 0x26 | 0x6 | Destination Size |
| 0x2C | 0x2 | Fragment Indicator Count |
| 0x2E | 0x1 | Content Type (0=Meta, 1=Program, 2=Data, 3=Control, 4=HtmlDocument, 5=LegalInformation, 6=DeltaFragment) |
| 0x2F | 0x1 | Update Type (0=ApplyAsDelta, 1=Overwrite, 2=Create) |
| 0x30 | 0x4 | Unused |
Fragment Indicator
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x2 | Content Info Index |
| 0x2 | 0x2 | Fragment Index |
Delta Extended Data
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x8 | Source Patch ID |
| 0x8 | 0x8 | Destination Patch ID |
| 0x10 | 0x4 | Source Version |
| 0x14 | 0x4 | Destination Version |
| 0x18 | 0x2 | Fragment Set Count |
| 0x1A | 0x6 | Unused |
| 0x20 | 0x34 * Fragment Set Count | Fragment Sets |
| 0x4 * Fragment Indicator Count (Fragment Set) | Fragment Indicators |
Digest
Always found at the end of the file.
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x20 | Digest |