Difference between revisions of "CNMT"

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m (Undo revision 9676 by Hiccup (talk))
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| 0x10 * Meta Count (From [[CNMT#Firmware_Variation_Info_(Version_2)|Firmware Variation Info (Version 2)]])
 
| 0x10 * Meta Count (From [[CNMT#Firmware_Variation_Info_(Version_2)|Firmware Variation Info (Version 2)]])
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| [[CNMT#Content_Meta_Info|Content Meta Info]] (If Refer To Base is True)
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| [[CNMT#Content_Meta_Info|Content Meta Info]] (If Refer To Base is False)
 
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Latest revision as of 01:18, 18 July 2020

This is the metadata file that ends in ".cnmt{.nca}" or "meta0.ncd". This seems to replace the TMD format.

The official name for CNMT is "PackagedContentMeta".

Header

Offset Size Description
0x0 0x8 ID
0x8 0x4 Version
0xC 0x1 Content Meta Type
0xD 0x1 Reserved
0xE 0x2 Extended Header Size
0x10 0x2 Content Count
0x12 0x2 Content Meta Count
0x14 0x1 Content Meta Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
0x15 0x3 Reserved
0x18 0x4 Required Download System Version
0x1C 0x4 Reserved

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 Required Application Version

Patch Extended Header

Offset Size Description
0x0 0x8 Application ID
0x8 0x4 Required System Version
0xC 0x4 Extended Data Size
0x10 0x8 Reserved

AddOnContent Extended Header

Offset Size Description
0x0 0x8 Application ID
0x8 0x4 Required Application Version
0xC 0x4 Reserved

Delta Extended Header

Offset Size Description
0x0 0x8 Application ID
0x8 0x4 Extended Data Size
0xC 0x4 Reserved

Packaged Content Info

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 Info

Offset Size Description
0x0 0x8 ID
0x8 0x4 Version
0xC 0x1 Content Meta Type
0xD 0x1 Content Meta Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
0xE 0x2 Reserved

This is used for SystemUpdate, see here: NCM_services#ReadEntryMetaRecords.

SystemUpdate Extended Data

If the Version field is 1, the format is:

Offset Size Description
0x0 0x4 Version
0x4 0x4 Variation Count
0x8 0x20 * Variation Count Firmware Variation Info (Version 1)

If the Version field is 2, the format is:

Offset Size Description
0x0 0x4 Version
0x4 0x4 Variation Count
0x8 0x4 * Variation Count Firmware Variation ID
0x20 * Variation Count Firmware Variation Info (Version 2)
0x10 * Meta Count (From Firmware Variation Info (Version 2)) Content Meta Info (If Refer To Base is False)

Firmware Variation Info (Version 1)

Offset Size Description
0x0 0x4 Firmware Variation ID
0x4 0x1C Reserved

Firmware Variation Info (Version 2)

Offset Size Description
0x0 0x1 Refer To Base (0=False, 1=True)
0x1 0x3 Reserved
0x4 0x4 Meta Count
0x8 0x18 Reserved

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 Reserved
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 Info (Packaged Content Info without the Hash entry)
0x38 * Delta Content Count Delta Packaged Content Info
0x4 * Fragment Indicator Count (From Fragment Sets) Fragment Indicators

History Header

Offset Size Description
0x0 0x10 Content Meta Key (Slightly different Content Meta Info)
0x10 0x20 Digest
0x30 0x2 Content Info Count
0x32 0x6 Reserved

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 Reserved

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 Reserved
0x20 0x2 Content Info Count
0x22 0x6 Reserved

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 Fragment Target 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 Reserved

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 Reserved
0x20 0x34 * Fragment Set Count Fragment Sets
0x4 * Fragment Indicator Count (From Fragment Sets) Fragment Indicators

Digest

Always found at the end of the file.

Offset Size Description
0x0 0x20 Digest
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