Difference between revisions of "CNMT"

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−
For the content of the NCA FS which can be [[Filesystem_services|mounted]], see [[NCA_Content_FS|here]].
+
This is the metadata file that ends in <code>".cnmt{.nca}"</code> or <code>"meta0.ncd"</code>. This seems to replace the TMD format.
  
−
For the format of the actual NCA, see [[NCA_Format|here]].
+
There's at least 9 different filenames used for ".cnmt":
−
 
 
−
= Metadata file =
 
−
This is the file that ends in <code>".cnmt{.nca}"</code> or <code>"meta0.ncd"</code>. This seems to replace the TMD format.
 
−
 
 
−
There's at least 7 different filenames used for ".cnmt":
 
 
* "Application_{lower-case hex titleID}.cnmt"
 
* "Application_{lower-case hex titleID}.cnmt"
 
* "Patch_{lower-case hex titleID}.cnmt"
 
* "Patch_{lower-case hex titleID}.cnmt"
 +
* "AddOnContent_{lower-case hex titleID}.cnmt"
 
* "SystemUpdate_{hex titleID}.cnmt"
 
* "SystemUpdate_{hex titleID}.cnmt"
 
* "SystemData_{lower-case hex titleID}.cnmt"
 
* "SystemData_{lower-case hex titleID}.cnmt"
Line 14: Line 10:
 
* "BootImagePackage_{lower-case hex titleID}.cnmt"
 
* "BootImagePackage_{lower-case hex titleID}.cnmt"
 
* "BootImagePackageSafe_{lower-case hex titleID}.cnmt"
 
* "BootImagePackageSafe_{lower-case hex titleID}.cnmt"
 +
* "Delta_{lower-case hex titleID}.cnmt"
  
−
It starts with a header:
+
== Header ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 23: Line 20:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 8
+
| 0x8
 
| Title ID
 
| Title ID
 
|-
 
|-
 
| 0x8
 
| 0x8
−
| 4
+
| 0x4
−
| u32 [[Title_list|title-version]]
+
| Version
 
|-
 
|-
 
| 0xC
 
| 0xC
−
| 1
+
| 0x1
−
| Type (see [[Content_Manager_services#Title_Types|Title Types]])
+
| [[NCM_services#Title_Types|Meta Type]]
 
|-
 
|-
 
| 0xD
 
| 0xD
−
| 1
+
| 0x1
−
|
+
| Unused
 
|-
 
|-
 
| 0xE
 
| 0xE
−
| 2
+
| 0x2
−
| Offset to table relative to the end of this 0x20-byte header.
+
| Extended Header Size
 
|-
 
|-
 
| 0x10
 
| 0x10
−
| 2
+
| 0x2
−
| Number of content entries
+
| Content Count
 
|-
 
|-
 
| 0x12
 
| 0x12
−
| 2
+
| 0x2
−
| Number of meta entries
+
| Content Meta Count
 
|-
 
|-
 
| 0x14
 
| 0x14
−
| 12
+
| 0x1
−
|
+
| Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
 +
|-
 +
| 0x15
 +
| 0x3
 +
| Unused
 +
|-
 +
| 0x18
 +
| 0x4
 +
| Required Download System Version
 +
|-
 +
| 0x1C
 +
| 0x4
 +
| Unused
 
|}
 
|}
  
−
With SystemUpdate, the 4-bytes at offset 0xE are zero, with the entry-count field located at offset 0x12 instead(header size is the same).
+
== SystemUpdate Extended Header ==
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| Extended Data Size
 +
|}
  
−
An optional header can follow, depending on the title type.
+
== Application Extended Header ==
−
 
+
{| class="wikitable" border="1"
−
At the end of the file following the entries is a 0x20-byte block, presumably a hash.
+
|-
−
 
+
! Offset
−
With Patch-format, there's additional data after the end of the entries specified in the header and before the ending hash.
+
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| Patch ID
 +
|-
 +
| 0x8
 +
| 0x4
 +
| Required System Version
 +
|-
 +
| 0xC
 +
| 0x4
 +
| Unused
 +
|}
  
−
== Application header ==
+
== Patch Extended Header ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 70: Line 103:
 
! Description
 
! Description
 
|-
 
|-
−
| 0x20
+
| 0x0
−
| 8
+
| 0x8
−
| Patch Title ID
+
| Application ID
 +
|-
 +
| 0x8
 +
| 0x4
 +
| Required System Version
 +
|-
 +
| 0xC
 +
| 0x4
 +
| Extended Data Size
 
|-
 
|-
−
| 0x28
+
| 0x10
−
| 8
+
| 0x8
−
| Minimum system version
+
| Unused
 
|}
 
|}
  
−
== Patch header ==
+
== AddOnContent Extended Header ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 86: Line 127:
 
! Description
 
! Description
 
|-
 
|-
−
| 0x20
+
| 0x0
−
| 8
+
| 0x8
−
| Original title ID
+
| Application ID
 +
|-
 +
| 0x8
 +
| 0x4
 +
| Required Application Version
 
|-
 
|-
−
| 0x28
+
| 0xC
−
| 8
+
| 0x4
−
| Minimum system version
+
| Unused
 
|}
 
|}
  
−
== Add-on content header ==
+
== Delta Extended Header ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 102: Line 147:
 
! Description
 
! Description
 
|-
 
|-
−
| 0x20
+
| 0x0
−
| 8
+
| 0x8
−
| Application title ID
+
| Application ID
 +
|-
 +
| 0x8
 +
| 0x4
 +
| Extended Data Size
 
|-
 
|-
−
| 0x28
+
| 0xC
−
| 8
+
| 0x4
−
| Minimum application version
+
| Unused
 
|}
 
|}
  
−
== Content records ==
+
== Content Records ==
−
 
 
−
Each entry is 0x38 bytes:
 
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 122: Line 169:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 32
+
| 0x20
 
| Hash
 
| Hash
 
|-
 
|-
 
| 0x20
 
| 0x20
−
| 16
+
| 0x10
−
| NcaId [same as first 16-bytes of hash]
+
| Content ID
 
|-
 
|-
 
| 0x30
 
| 0x30
−
| 6
+
| 0x6
−
| Size, same as the output from [[Content_Manager_services#GetEntrySize]].
+
| Size
 
|-
 
|-
 
| 0x36
 
| 0x36
−
| 1
+
| 0x1
−
| Type (0=meta, 1=program, 2=data, 3=control, 4=offline-manual [[Internet_Browser|html]], 5=legal [[Internet_Browser|html]], 6=[[NCA_Format|game-update]] RomFS patches?)
+
| Content Type (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
 
|-
 
|-
 
| 0x37
 
| 0x37
−
| 1
+
| 0x1
−
|
+
| Id Offset
 +
|}
 +
 
 +
== Content Meta Records ==
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| Title ID
 +
|-
 +
| 0x8
 +
| 0x4
 +
| Version
 +
|-
 +
| 0xC
 +
| 0x1
 +
| [[NCM_services#Title_Types|Meta Type]]
 +
|-
 +
| 0xD
 +
| 0x1
 +
| Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
 +
|-
 +
| 0xE
 +
| 0x2
 +
| Unused
 
|}
 
|}
  
−
== Meta records ==
+
This is used for SystemUpdate, see here: [[NCM_services#ReadEntryMetaRecords]].
  
−
Each entry is 0x10 bytes:
+
== SystemUpdate Extended Data ==
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 153: Line 229:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 8
+
| 0x4
−
| Title ID
+
| Version
 +
|-
 +
| 0x4
 +
| 0x4
 +
| Variation Count
 +
|-
 +
| 0x8
 +
| 0x4
 +
| Firmware Variation
 +
|-
 +
| 0xC
 +
| 0x1C * Variation Count
 +
| Unused
 +
|}
 +
 
 +
== Patch Extended Data ==
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| History Count
 +
|-
 +
| 0x4
 +
| 0x4
 +
| Delta History Count
 
|-
 
|-
 
| 0x8
 
| 0x8
−
| 4
+
| 0x4
−
| Title version
+
| Delta Count
 +
|-
 +
| 0xC
 +
| 0x4
 +
| Fragment Set Count
 +
|-
 +
| 0x10
 +
| 0x4
 +
| History Content Count
 +
|-
 +
| 0x14
 +
| 0x4
 +
| Delta Content Count
 +
|-
 +
| 0x18
 +
| 0x4
 +
| Unused
 +
|-
 +
| 0x1C
 +
| 0x38 * History Count
 +
| [[CNMT#History_Header|History Headers]]
 +
|-
 +
|
 +
| 0x28 * Delta History Count
 +
| [[CNMT#Delta_History|Delta Histories]]
 +
|-
 +
|
 +
| 0x28 * Delta Count
 +
| [[CNMT#Delta_Header|Delta Headers]]
 +
|-
 +
|
 +
| 0x34 * Fragment Set Count
 +
| [[CNMT#Fragment_Set|Fragment Sets]]
 +
|-
 +
|
 +
| 0x18 * History Content Count
 +
| [[CNMT#Content_Records|History Content Records (Content Records without the Hash entry)]]
 +
|-
 +
|
 +
| 0x38 * Delta Content Count
 +
| [[CNMT#Content_Records|Delta Content Records]]
 +
|-
 +
|
 +
| 0x4 * Fragment Indicator Count (Fragment Set)
 +
| [[CNMT#Fragment_Indicator|Fragment Indicators]]
 +
|}
 +
 
 +
=== History Header ===
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x10
 +
| [[CNMT#Content_Meta_Records|Content Meta Record]]
 
|-
 
|-
 
| 0xC
 
| 0xC
−
| 1
+
| 0x1
−
| Type (see [[Content_Manager_services#Title_Types|Title Types]])
+
| [[NCM_services#Title_Types|Meta Type]]
 
|-
 
|-
 
| 0xD
 
| 0xD
−
| 1
+
| 0x1
−
| ? bit0 set = don't install?
+
| Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
 
|-
 
|-
 
| 0xE
 
| 0xE
−
| 2
+
| 0x2
−
| Unused?
+
| Unused
 +
|-
 +
| 0x10
 +
| 0x20
 +
| Digest
 +
|-
 +
| 0x30
 +
| 0x2
 +
| Content Info Count
 +
|-
 +
| 0x32
 +
| 0x6
 +
| Unused
 +
|}
 +
 
 +
=== Delta History ===
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! 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
 
|}
 
|}
  
−
This is used for SystemUpdate, see here: [[Content_Manager_services#GetUpdateTitleList]].
+
=== Delta Header ===
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! 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 ===
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! 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=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
 +
|-
 +
| 0x2F
 +
| 0x1
 +
| Update Type (0=ApplyAsDelta, 1=Overwrite, 2=Create)
 +
|-
 +
| 0x30
 +
| 0x4
 +
| Unused
 +
|}
 +
 
 +
=== Fragment Indicator ===
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x2
 +
| Content Info Index
 +
|-
 +
| 0x2
 +
| 0x2
 +
| Fragment Index
 +
|}
 +
 
 +
== Delta Extended Data ==
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! 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
 +
| [[CNMT#Fragment_Set|Fragment Sets]]
 +
|-
 +
|
 +
| 0x4 * Fragment Indicator Count (Fragment Set)
 +
| [[CNMT#Fragment_Indicator|Fragment Indicators]]
 +
|}
 +
 
 +
== Digest ==
 +
 
 +
Always found at the end of the file.
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x20
 +
| Digest
 +
|}

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
Retrieved from "https://switchbrew.org/w/index.php?title=CNMT&oldid=6944"