Difference between revisions of "CNMT"

From Nintendo Switch Brew
Jump to navigation Jump to search
(Update header and extended header - next is extended data)
 
(12 intermediate revisions by 3 users not shown)
Line 1: Line 1:
 
This is the metadata file that ends in <code>".cnmt{.nca}"</code> or <code>"meta0.ncd"</code>. This seems to replace the TMD format.
 
This is the metadata file that ends in <code>".cnmt{.nca}"</code> or <code>"meta0.ncd"</code>. This seems to replace the TMD format.
  
There's at least 9 different filenames used for ".cnmt":
+
The official name for CNMT is "PackagedContentMeta".
* "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 ==
 
== Header ==
Line 21: Line 12:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
| Title ID
+
| ID
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x4
 
| 0x4
| [[Title_list|Version]]
+
| Version
 
|-
 
|-
 
| 0xC
 
| 0xC
 
| 0x1
 
| 0x1
| [[NCM_services#Title_Types|Meta Type]]
+
| [[NCM_services#ContentMetaType|Content Meta Type]]
 
|-
 
|-
 
| 0xD
 
| 0xD
 
| 0x1
 
| 0x1
| Unused
+
| Reserved
 
|-
 
|-
 
| 0xE
 
| 0xE
Line 49: Line 40:
 
| 0x14
 
| 0x14
 
| 0x1
 
| 0x1
| Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
+
| Content Meta Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
 
|-
 
|-
 
| 0x15
 
| 0x15
 
| 0x3
 
| 0x3
| Unused
+
| Reserved
 
|-
 
|-
 
| 0x18
 
| 0x18
Line 61: Line 52:
 
| 0x1C
 
| 0x1C
 
| 0x4
 
| 0x4
| Unused
+
| Reserved
 
|}
 
|}
  
Line 73: Line 64:
 
| 0x0
 
| 0x0
 
| 0x4
 
| 0x4
| Extended Header Size
+
| Extended Data Size
 
|}
 
|}
  
Line 90: Line 81:
 
| 0x4
 
| 0x4
 
| Required System Version
 
| Required System Version
 +
|-
 +
| 0xC
 +
| 0x4
 +
| Required Application Version
 
|}
 
|}
  
Line 113: Line 108:
 
| 0x10
 
| 0x10
 
| 0x8
 
| 0x8
| Unused
+
| Reserved
 
|}
 
|}
  
Line 133: Line 128:
 
| 0xC
 
| 0xC
 
| 0x4
 
| 0x4
| Unused
+
| Reserved
 
|}
 
|}
  
Line 153: Line 148:
 
| 0xC
 
| 0xC
 
| 0x4
 
| 0x4
| Unused
+
| Reserved
 
|}
 
|}
  
== Content records ==
+
== Packaged Content Info ==
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 166: Line 161:
 
| 0x0
 
| 0x0
 
| 0x20
 
| 0x20
| Hash
+
| Hash (SHA256 of the referenced content)
 
|-
 
|-
 
| 0x20
 
| 0x20
Line 178: Line 173:
 
| 0x36
 
| 0x36
 
| 0x1
 
| 0x1
| Title Type (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
+
| Content Type (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
 
|-
 
|-
 
| 0x37
 
| 0x37
 
| 0x1
 
| 0x1
| Id Offset
+
| ID Offset
 
|}
 
|}
  
== Meta records ==
+
== Content Meta Info ==
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 195: Line 190:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
| Title ID
+
| ID
 
|-
 
|-
 
| 0x8
 
| 0x8
Line 203: Line 198:
 
| 0xC
 
| 0xC
 
| 0x1
 
| 0x1
| [[NCM_services#Title_Types|Meta Type]]
+
| [[NCM_services#Title_Types|Content Meta Type]]
 
|-
 
|-
 
| 0xD
 
| 0xD
 
| 0x1
 
| 0x1
| Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
+
| Content Meta Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
 
|-
 
|-
 
| 0xE
 
| 0xE
 
| 0x2
 
| 0x2
| Unused
+
| Reserved
 
|}
 
|}
  
 
This is used for SystemUpdate, see here: [[NCM_services#ReadEntryMetaRecords]].
 
This is used for SystemUpdate, see here: [[NCM_services#ReadEntryMetaRecords]].
  
== Extended data ==
+
== SystemUpdate Extended Data ==
  
Patch-type cnmt files include an extended data section.
+
If the Version field is 1, the format is:
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| Version
 +
|-
 +
| 0x4
 +
| 0x4
 +
| Variation Count
 +
|-
 +
| 0x8
 +
| 0x20 * Variation Count
 +
| [[CNMT#Firmware_Variation_Info_(Version_1)|Firmware Variation Info (Version 1)]]
 +
|}
  
 +
If the Version field is 2, the format is:
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 227: Line 241:
 
|-
 
|-
 
| 0x0
 
| 0x0
| 4
+
| 0x4
| Number of previous cnmt entries.
+
| Version
 
|-
 
|-
 
| 0x4
 
| 0x4
| 4
+
| 0x4
| Number of previous delta entries.
+
| Variation Count
 
|-
 
|-
 
| 0x8
 
| 0x8
| 4
+
| 0x4 * Variation Count
| Number of delta info entries.
+
| Firmware Variation ID
 +
|-
 +
|
 +
| 0x20 * Variation Count
 +
| [[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)]])
 +
| [[CNMT#Content_Meta_Info|Content Meta Info]] (If Refer To Base is False)
 +
|}
 +
 
 +
=== Firmware Variation Info (Version 1) ===
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| Firmware Variation ID
 +
|-
 +
| 0x4
 +
| 0x1C
 +
| Reserved
 +
|}
 +
 
 +
=== Firmware Variation Info (Version 2) ===
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! 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 ==
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| History Count
 +
|-
 +
| 0x4
 +
| 0x4
 +
| Delta History Count
 +
|-
 +
| 0x8
 +
| 0x4
 +
| Delta Count
 
|-
 
|-
 
| 0xC
 
| 0xC
| 4
+
| 0x4
| Number of delta application info entries.
+
| Fragment Set Count
 
|-
 
|-
 
| 0x10
 
| 0x10
| 4
+
| 0x4
| Number of previous content entries.
+
| History Content Count
 
|-
 
|-
 
| 0x14
 
| 0x14
| 4
+
| 0x4
| Number of delta content entries.
+
| Delta Content Count
 
|-
 
|-
 
| 0x18
 
| 0x18
| 4
+
| 0x4
| Unused?
+
| Reserved
 
|-
 
|-
 
| 0x1C
 
| 0x1C
| 0x38*X
+
| 0x38 * History Count
| Previous cnmt entries
+
| [[CNMT#History_Header|History Headers]]
 
|-
 
|-
 
|  
 
|  
| 0x28*X
+
| 0x28 * Delta History Count
| Previous delta entries
+
| [[CNMT#Delta_History|Delta Histories]]
 
|-
 
|-
 
|  
 
|  
| 0x28*X
+
| 0x28 * Delta Count
| Delta info entries
+
| [[CNMT#Delta_Header|Delta Headers]]
 
|-
 
|-
 
|  
 
|  
| 0x34*X
+
| 0x34 * Fragment Set Count
| Delta application info entries
+
| [[CNMT#Fragment_Set|Fragment Sets]]
 
|-
 
|-
 
|  
 
|  
| 0x18*X
+
| 0x18 * History Content Count
| Previous content entries
+
| [[CNMT#Packaged_Content_Info|History Content Info]] (Packaged Content Info without the Hash entry)
 
|-
 
|-
 
|  
 
|  
| 0x38*X
+
| 0x38 * Delta Content Count
| Delta content entries. (Standard content records)
+
| [[CNMT#Packaged_Content_Info|Delta Packaged Content Info]]
|-
 
|  
 
| 4
 
| Unknown
 
|-
 
|
 
| 4
 
| Unknown
 
|-
 
|
 
| 4
 
| Unknown
 
 
|-
 
|-
 +
|
 +
| 0x4 * Fragment Indicator Count (From [[CNMT#Fragment_Set|Fragment Sets]])
 +
| [[CNMT#Fragment_Indicator|Fragment Indicators]]
 
|}
 
|}
  
== Previous cnmt records ==
+
=== History Header ===
 
 
Each entry is 0x38 bytes:
 
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 303: Line 377:
 
|-
 
|-
 
| 0x0
 
| 0x0
| 8
+
| 0x10
| Title ID
+
| Content Meta Key (Slightly different Content Meta Info)
|-
 
| 0x8
 
| 4
 
| Title version
 
|-
 
| 0xC
 
| 1
 
| Type (see [[NCM_services#Title_Types|Title Types]])
 
|-
 
| 0xD
 
| 3
 
| Unused?
 
 
|-
 
|-
 
| 0x10
 
| 0x10
| 32
+
| 0x20
| Hash
+
| Digest
 
|-
 
|-
 
| 0x30
 
| 0x30
| 2
+
| 0x2
| Unknown
+
| Content Info Count
 
|-
 
|-
 
| 0x32
 
| 0x32
| 2
+
| 0x6
| Unused?
+
| Reserved
|-
 
| 0x34
 
| 4
 
| Unused?
 
|-
 
 
|}
 
|}
  
This contains information on previous metadata files.
+
=== Delta History ===
 
 
== Previous delta records ==
 
 
 
Each entry is 0x28 bytes:
 
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 349: Line 402:
 
|-
 
|-
 
| 0x0
 
| 0x0
| 8
+
| 0x8
| Old title ID
+
| Source Patch ID
 
|-
 
|-
 
| 0x8
 
| 0x8
| 8
+
| 0x8
| New title ID
+
| Destination Patch ID
 
|-
 
|-
 
| 0x10
 
| 0x10
| 4
+
| 0x4
| Old title version
+
| Source Version
 
|-
 
|-
 
| 0x14
 
| 0x14
| 4
+
| 0x4
| New title version
+
| Destination Version
 
|-
 
|-
 
| 0x18
 
| 0x18
| 8
+
| 0x8
| Size
+
| Download Size
 
|-
 
|-
 
| 0x20
 
| 0x20
| 8
+
| 0x8
| Unused?
+
| Reserved
|-
 
 
|}
 
|}
  
This contains information on previous delta patches.
+
=== Delta Header ===
 
 
== Delta info records ==
 
 
 
Each entry is 0x28 bytes:
 
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 387: Line 435:
 
|-
 
|-
 
| 0x0
 
| 0x0
| 8
+
| 0x8
| Old title ID
+
| Source Patch ID
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 8
 
| 8
| New title ID
+
| Destination Patch ID
 
|-
 
|-
 
| 0x10
 
| 0x10
| 4
+
| 0x4
| Old title version
+
| Source Version
 
|-
 
|-
 
| 0x14
 
| 0x14
| 4
+
| 0x4
| New title version
+
| Destination Version
 
|-
 
|-
 
| 0x18
 
| 0x18
| 8
+
| 0x2
| Some sort of index?
+
| Fragment Set Count
 +
|-
 +
| 0x1A
 +
| 0x6
 +
| Reserved
 
|-
 
|-
 
| 0x20
 
| 0x20
| 8
+
| 0x2
| Some sort of index?
+
| Content Info Count
 
|-
 
|-
 +
| 0x22
 +
| 0x6
 +
| Reserved
 
|}
 
|}
  
This contains information on the current delta patch.
+
=== Fragment Set ===
 
 
== Delta application info records ==
 
 
 
Each entry is 0x34 bytes:
 
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 425: Line 476:
 
|-
 
|-
 
| 0x0
 
| 0x0
| 16
+
| 0x10
| Old NcaId
+
| Source Content ID
 
|-
 
|-
 
| 0x10
 
| 0x10
| 16
+
| 0x10
| New NcaId
+
| Destination Content ID
 
|-
 
|-
 
| 0x20
 
| 0x20
| 6
+
| 0x6
| Old size
+
| Source Size
 
|-
 
|-
 
| 0x26
 
| 0x26
| 2
+
| 0x6
| Upper 2 bytes of the new size
+
| Destination Size
|-
 
| 0x28
 
| 4
 
| Lower 4 bytes of the new size
 
 
|-
 
|-
 
| 0x2C
 
| 0x2C
| 2
+
| 0x2
| Unknown
+
| Fragment Indicator Count
 
|-
 
|-
 
| 0x2E
 
| 0x2E
| 1
+
| 0x1
| Type (see [[NCM_services#Title_Types|Title Types]])
+
| Fragment Target Content Type (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
 
|-
 
|-
 
| 0x2F
 
| 0x2F
| 1
+
| 0x1
| ? bit0 set = don't install?
+
| Update Type (0=ApplyAsDelta, 1=Overwrite, 2=Create)
 
|-
 
|-
 
| 0x30
 
| 0x30
| 4
+
| 0x4
| Unused?
+
| Reserved
|-
 
 
|}
 
|}
  
This contains information on how to apply deltas to the previous patch.
+
=== Fragment Indicator ===
  
== Previous content records ==
+
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x2
 +
| Content Info Index
 +
|-
 +
| 0x2
 +
| 0x2
 +
| Fragment Index
 +
|}
  
Each entry is 0x18 bytes:
+
== Delta Extended Data ==
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 475: Line 534:
 
|-
 
|-
 
| 0x0
 
| 0x0
| 16
+
| 0x8
| NcaId
+
| Source Patch ID
 +
|-
 +
| 0x8
 +
| 0x8
 +
| Destination Patch ID
 
|-
 
|-
 
| 0x10
 
| 0x10
| 6
+
| 0x4
| Size
+
| Source Version
 +
|-
 +
| 0x14
 +
| 0x4
 +
| Destination Version
 +
|-
 +
| 0x18
 +
| 0x2
 +
| Fragment Set Count
 
|-
 
|-
| 0x16
+
| 0x1A
| 1
+
| 0x6
| Type (see [[NCM_services#Title_Types|Title Types]])
+
| Reserved
 
|-
 
|-
| 0x17
+
| 0x20
| 1
+
| 0x34 * Fragment Set Count
|  
+
| [[CNMT#Fragment_Set|Fragment Sets]]
 
|-
 
|-
 +
|
 +
| 0x4 * Fragment Indicator Count (From [[CNMT#Fragment_Set|Fragment Sets]])
 +
| [[CNMT#Fragment_Indicator|Fragment Indicators]]
 
|}
 
|}
  
This contains information on previous title content from earlier patches.
+
== Digest ==
 +
 
 +
Always found at the end of the file.
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x20
 +
| Digest
 +
|}

Latest revision as of 22:37, 11 January 2022

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 (SHA256 of the referenced content)
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