Difference between revisions of "CNMT"

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Line 3: Line 3:
 
The official name for CNMT is "PackagedContentMeta".
 
The official name for CNMT is "PackagedContentMeta".
  
−
== Header ==
+
= PackagedContentMetaHeader =
 +
This is "nn::ncm::PackagedContentMetaHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 12: Line 14:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| ID
+
| Id
 
|-
 
|-
 
| 0x8
 
| 0x8
Line 20: Line 22:
 
| 0xC
 
| 0xC
 
| 0x1
 
| 0x1
−
| [[NCM_services#ContentMetaType|Content Meta Type]]
+
| [[NCM_services#ContentMetaType|ContentMetaType]]
 
|-
 
|-
 
| 0xD
 
| 0xD
 
| 0x1
 
| 0x1
−
| Reserved
+
| [17.0.0+] [[NCM_services#ContentMetaPlatform|ContentMetaPlatform]] ([1.0.0-16.1.0] Reserved)
 
|-
 
|-
 
| 0xE
 
| 0xE
 
| 0x2
 
| 0x2
−
| Extended Header Size
+
| ExtendedHeaderSize
 
|-
 
|-
 
| 0x10
 
| 0x10
 
| 0x2
 
| 0x2
−
| Content Count
+
| ContentCount
 
|-
 
|-
 
| 0x12
 
| 0x12
 
| 0x2
 
| 0x2
−
| Content Meta Count
+
| ContentMetaCount
 
|-
 
|-
 
| 0x14
 
| 0x14
 
| 0x1
 
| 0x1
−
| Content Meta Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
+
| ContentMetaAttributes (0=None, 1=IncludesExFatDriver, 2=Rebootless, 4=Compacted)
 
|-
 
|-
 
| 0x15
 
| 0x15
Line 48: Line 50:
 
| 0x18
 
| 0x18
 
| 0x4
 
| 0x4
−
| Required Download System Version
+
| RequiredDownloadSystemVersion
 
|-
 
|-
 
| 0x1C
 
| 0x1C
Line 55: Line 57:
 
|}
 
|}
  
−
== SystemUpdate Extended Header ==
+
= SystemUpdateMetaExtendedHeader =
 +
This is "nn::ncm::SystemUpdateMetaExtendedHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 64: Line 68:
 
| 0x0
 
| 0x0
 
| 0x4
 
| 0x4
−
| Extended Data Size
+
| ExtendedDataSize
 
|}
 
|}
  
−
== Application Extended Header ==
+
= ApplicationMetaExtendedHeader =
 +
This is "nn::ncm::ApplicationMetaExtendedHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 76: Line 82:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Patch ID
+
| PatchId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x4
 
| 0x4
−
| Required System Version
+
| RequiredSystemVersion
 
|-
 
|-
 
| 0xC
 
| 0xC
 
| 0x4
 
| 0x4
−
| Required Application Version
+
| RequiredApplicationVersion
 
|}
 
|}
  
−
== Patch Extended Header ==
+
= PatchMetaExtendedHeader =
 +
This is "nn::ncm::PatchMetaExtendedHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 96: Line 104:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Application ID
+
| ApplicationId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x4
 
| 0x4
−
| Required System Version
+
| RequiredSystemVersion
 
|-
 
|-
 
| 0xC
 
| 0xC
 
| 0x4
 
| 0x4
−
| Extended Data Size
+
| ExtendedDataSize
 
|-
 
|-
 
| 0x10
 
| 0x10
Line 111: Line 119:
 
|}
 
|}
  
−
== AddOnContent Extended Header ==
+
= AddOnContentMetaExtendedHeader =
 +
This is "nn::ncm::AddOnContentMetaExtendedHeader".
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| ApplicationId
 +
|-
 +
| 0x8
 +
| 0x4
 +
| RequiredApplicationVersion
 +
|-
 +
| 0xC
 +
| 0x1
 +
| [15.0.0+] ContentAccessibilities ([1.0.0-14.1.2] Reserved)
 +
|-
 +
| 0xD
 +
| 0x3
 +
| Reserved
 +
|-
 +
| 0x10
 +
| 0x8
 +
| [15.0.0+] DataPatchId
 +
|}
 +
 
 +
= DeltaMetaExtendedHeader =
 +
This is "nn::ncm::DeltaMetaExtendedHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 120: Line 160:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Application ID
+
| ApplicationId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x4
 
| 0x4
−
| Required Application Version
+
| ExtendedDataSize
 
|-
 
|-
 
| 0xC
 
| 0xC
Line 131: Line 171:
 
|}
 
|}
  
−
== Delta Extended Header ==
+
= DataPatchMetaExtendedHeader =
 +
This is "nn::ncm::DataPatchMetaExtendedHeader".
 +
 
 +
This was added with [15.0.0+].
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 140: Line 184:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Application ID
+
| DataId
 
|-
 
|-
 
| 0x8
 
| 0x8
 +
| 0x8
 +
| ApplicationId
 +
|-
 +
| 0x10
 
| 0x4
 
| 0x4
−
| Extended Data Size
+
| RequiredApplicationVersion
 
|-
 
|-
−
| 0xC
+
| 0x14
 
| 0x4
 
| 0x4
 +
| ExtendedDataSize
 +
|-
 +
| 0x18
 +
| 0x8
 
| Reserved
 
| Reserved
 
|}
 
|}
  
−
== Packaged Content Info ==
+
= PackagedContentInfo =
 +
This is "nn::ncm::PackagedContentInfo".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 165: Line 218:
 
| 0x20
 
| 0x20
 
| 0x10
 
| 0x10
−
| Content ID
+
| ContentId
 
|-
 
|-
 
| 0x30
 
| 0x30
Line 173: Line 226:
 
| 0x35
 
| 0x35
 
| 0x1
 
| 0x1
−
| [15.0.0+] Content Attributes
+
| [15.0.0+] ContentAttributes
 
|-
 
|-
 
| 0x36
 
| 0x36
 
| 0x1
 
| 0x1
−
| Content Type (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
+
| ContentType (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
+
| IdOffset
 
|}
 
|}
  
−
== Content Meta Info ==
+
= ContentMetaInfo =
 +
This is "nn::ncm::ContentMetaInfo".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 194: Line 248:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| ID
+
| Id
 
|-
 
|-
 
| 0x8
 
| 0x8
Line 202: Line 256:
 
| 0xC
 
| 0xC
 
| 0x1
 
| 0x1
−
| [[NCM_services#Title_Types|Content Meta Type]]
+
| [[NCM_services#ContentMetaType|ContentMetaType]]
 
|-
 
|-
 
| 0xD
 
| 0xD
 
| 0x1
 
| 0x1
−
| Content Meta Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
+
| ContentMetaAttributes (0=None, 1=IncludesExFatDriver, 2=Rebootless, 4=Compacted)
 
|-
 
|-
 
| 0xE
 
| 0xE
Line 215: Line 269:
 
This is used for SystemUpdate, see here: [[NCM_services#ReadEntryMetaRecords]].
 
This is used for SystemUpdate, see here: [[NCM_services#ReadEntryMetaRecords]].
  
−
== SystemUpdate Extended Data ==
+
= SystemUpdateMetaExtendedData =
 +
This is "nn::ncm::SystemUpdateMetaExtendedData".
  
 
If the Version field is 1, the format is:
 
If the Version field is 1, the format is:
Line 230: Line 285:
 
| 0x4
 
| 0x4
 
| 0x4
 
| 0x4
−
| Variation Count
+
| VariationCount
 
|-
 
|-
 
| 0x8
 
| 0x8
−
| 0x20 * Variation Count
+
| 0x20 * VariationCount
−
| [[CNMT#Firmware_Variation_Info_(Version_1)|Firmware Variation Info (Version 1)]]
+
| [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 1)
 
|}
 
|}
  
Line 250: Line 305:
 
| 0x4
 
| 0x4
 
| 0x4
 
| 0x4
−
| Variation Count
+
| VariationCount
 
|-
 
|-
 
| 0x8
 
| 0x8
−
| 0x4 * Variation Count
+
| 0x4 * VariationCount
−
| Firmware Variation ID
+
| FirmwareVariationId
 
|-
 
|-
−
|  
+
| Variable
−
| 0x20 * Variation Count
+
| 0x20 * VariationCount
−
| [[CNMT#Firmware_Variation_Info_(Version_2)|Firmware Variation Info (Version 2)]]
+
| [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 2)
 
|-
 
|-
−
|  
+
| Variable
−
| 0x10 * Meta Count (From [[CNMT#Firmware_Variation_Info_(Version_2)|Firmware Variation Info (Version 2)]])
+
| 0x10 * MetaCount (from [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 2))
−
| [[CNMT#Content_Meta_Info|Content Meta Info]] (If Refer To Base is False)
+
| [[#ContentMetaInfo|ContentMetaInfo]] (if ReferToBase is False)
 
|}
 
|}
  
−
=== Firmware Variation Info (Version 1) ===
+
== FirmwareVariationInfo ==
 +
This is "FirmwareVariationInfo ".
  
 +
If the Version field is 1, the format is:
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 275: Line 332:
 
| 0x0
 
| 0x0
 
| 0x4
 
| 0x4
−
| Firmware Variation ID
+
| FirmwareVariationId
 
|-
 
|-
 
| 0x4
 
| 0x4
Line 282: Line 339:
 
|}
 
|}
  
−
=== Firmware Variation Info (Version 2) ===
+
If the Version field is 2, the format is:
−
 
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 292: Line 348:
 
| 0x0
 
| 0x0
 
| 0x1
 
| 0x1
−
| Refer To Base (0=False, 1=True)
+
| ReferToBase (0=False, 1=True)
 
|-
 
|-
 
| 0x1
 
| 0x1
Line 300: Line 356:
 
| 0x4
 
| 0x4
 
| 0x4
 
| 0x4
−
| Meta Count
+
| MetaCount
 
|-
 
|-
 
| 0x8
 
| 0x8
Line 307: Line 363:
 
|}
 
|}
  
−
== Patch Extended Data ==
+
= PatchMetaExtendedData =
 +
This is "nn::ncm::PatchMetaExtendedData".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 317: Line 374:
 
| 0x0
 
| 0x0
 
| 0x4
 
| 0x4
−
| History Count
+
| PatchHistoryHeaderCount
 
|-
 
|-
 
| 0x4
 
| 0x4
 
| 0x4
 
| 0x4
−
| Delta History Count
+
| PatchDeltaHistoryCount
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x4
 
| 0x4
−
| Delta Count
+
| PatchDeltaHeaderCount
 
|-
 
|-
 
| 0xC
 
| 0xC
 
| 0x4
 
| 0x4
−
| Fragment Set Count
+
| FragmentSetCount
 
|-
 
|-
 
| 0x10
 
| 0x10
 
| 0x4
 
| 0x4
−
| History Content Count
+
| PatchHistoryContentInfoCount
 
|-
 
|-
 
| 0x14
 
| 0x14
 
| 0x4
 
| 0x4
−
| Delta Content Count
+
| PatchDeltaPackagedContentInfoCount
 
|-
 
|-
 
| 0x18
 
| 0x18
Line 344: Line 401:
 
|-
 
|-
 
| 0x1C
 
| 0x1C
−
| 0x38 * History Count
+
| 0x38 * PatchHistoryHeaderCount
−
| [[CNMT#History_Header|History Headers]]
+
| [[#PatchHistoryHeader|PatchHistoryHeader]]
 
|-
 
|-
−
|  
+
| Variable
−
| 0x28 * Delta History Count
+
| 0x28 * PatchDeltaHistoryCount
−
| [[CNMT#Delta_History|Delta Histories]]
+
| [[#PatchDeltaHistory|PatchDeltaHistory]]
 
|-
 
|-
−
|  
+
| Variable
−
| 0x28 * Delta Count
+
| 0x28 * PatchDeltaHeaderCount
−
| [[CNMT#Delta_Header|Delta Headers]]
+
| [[#PatchDeltaHeader|PatchDeltaHeader]]
 
|-
 
|-
−
|  
+
| Variable
−
| 0x34 * Fragment Set Count
+
| 0x34 * FragmentSetCount
−
| [[CNMT#Fragment_Set|Fragment Sets]]
+
| [[#FragmentSet|FragmentSet]]
 
|-
 
|-
−
|  
+
| Variable
−
| 0x18 * History Content Count
+
| 0x18 * PatchHistoryContentInfoCount
−
| [[CNMT#Packaged_Content_Info|History Content Info]] (Packaged Content Info without the Hash entry)
+
| [[#PackagedContentInfo|PatchHistoryContentInfo]] ([[#PackagedContentInfo|PackagedContentInfo]] without the Hash entry)
 
|-
 
|-
−
|  
+
| Variable
−
| 0x38 * Delta Content Count
+
| 0x38 * PatchDeltaPackagedContentInfoCount
−
| [[CNMT#Packaged_Content_Info|Delta Packaged Content Info]]
+
| [[#PackagedContentInfo|PatchDeltaPackagedContentInfo]]
 
|-
 
|-
−
|
+
| Variable
−
| 0x4 * Fragment Indicator Count (From [[CNMT#Fragment_Set|Fragment Sets]])
+
| 0x4 * FragmentIndicatorCount (from [[#FragmentSet|FragmentSet]])
−
| [[CNMT#Fragment_Indicator|Fragment Indicators]]
+
| [[#FragmentIndicator|FragmentIndicator]]
 
|}
 
|}
  
−
=== History Header ===
+
== PatchHistoryHeader ==
 +
This is "nn::ncm::PatchHistoryHeader".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 382: Line 440:
 
| 0x0
 
| 0x0
 
| 0x10
 
| 0x10
−
| Content Meta Key (Slightly different Content Meta Info)
+
| ContentMetaKey
 
|-
 
|-
 
| 0x10
 
| 0x10
Line 390: Line 448:
 
| 0x30
 
| 0x30
 
| 0x2
 
| 0x2
−
| Content Info Count
+
| ContentInfoCount
 
|-
 
|-
 
| 0x32
 
| 0x32
Line 397: Line 455:
 
|}
 
|}
  
−
=== Delta History ===
+
== PatchDeltaHistory ==
 +
This is "nn::ncm::PatchDeltaHistory".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 407: Line 466:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Source Patch ID
+
| SourcePatchId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x8
 
| 0x8
−
| Destination Patch ID
+
| DestinationPatchId
 
|-
 
|-
 
| 0x10
 
| 0x10
 
| 0x4
 
| 0x4
−
| Source Version
+
| SourceVersion
 
|-
 
|-
 
| 0x14
 
| 0x14
 
| 0x4
 
| 0x4
−
| Destination Version
+
| DestinationVersion
 
|-
 
|-
 
| 0x18
 
| 0x18
 
| 0x8
 
| 0x8
−
| Download Size
+
| DownloadSize
 
|-
 
|-
 
| 0x20
 
| 0x20
Line 430: Line 489:
 
|}
 
|}
  
−
=== Delta Header ===
+
== PatchDeltaHeader ==
 +
This is "nn::ncm::PatchDeltaHeader".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 440: Line 500:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Source Patch ID
+
| SourcePatchId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 8
 
| 8
−
| Destination Patch ID
+
| DestinationPatchId
 
|-
 
|-
 
| 0x10
 
| 0x10
 
| 0x4
 
| 0x4
−
| Source Version
+
| SourceVersion
 
|-
 
|-
 
| 0x14
 
| 0x14
 
| 0x4
 
| 0x4
−
| Destination Version
+
| DestinationVersion
 
|-
 
|-
 
| 0x18
 
| 0x18
 
| 0x2
 
| 0x2
−
| Fragment Set Count
+
| FragmentSetCount
 
|-
 
|-
 
| 0x1A
 
| 0x1A
Line 464: Line 524:
 
| 0x20
 
| 0x20
 
| 0x2
 
| 0x2
−
| Content Info Count
+
| ContentInfoCount
 
|-
 
|-
 
| 0x22
 
| 0x22
Line 471: Line 531:
 
|}
 
|}
  
−
=== Fragment Set ===
+
== FragmentSet ==
 +
This is "nn::ncm::FragmentSet".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 481: Line 542:
 
| 0x0
 
| 0x0
 
| 0x10
 
| 0x10
−
| Source Content ID
+
| SourceContentId
 
|-
 
|-
 
| 0x10
 
| 0x10
 
| 0x10
 
| 0x10
−
| Destination Content ID
+
| DestinationContentId
 
|-
 
|-
 
| 0x20
 
| 0x20
 
| 0x6
 
| 0x6
−
| Source Size
+
| SourceSize
 
|-
 
|-
 
| 0x26
 
| 0x26
 
| 0x6
 
| 0x6
−
| Destination Size
+
| DestinationSize
 
|-
 
|-
 
| 0x2C
 
| 0x2C
 
| 0x2
 
| 0x2
−
| Fragment Indicator Count
+
| FragmentIndicatorCount
 
|-
 
|-
 
| 0x2E
 
| 0x2E
 
| 0x1
 
| 0x1
−
| Fragment Target Content Type (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
+
| FragmentTargetContentType (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
 
|-
 
|-
 
| 0x2F
 
| 0x2F
 
| 0x1
 
| 0x1
−
| Update Type (0=ApplyAsDelta, 1=Overwrite, 2=Create)
+
| UpdateType (0=ApplyAsDelta, 1=Overwrite, 2=Create)
 
|-
 
|-
 
| 0x30
 
| 0x30
Line 512: Line 573:
 
|}
 
|}
  
−
=== Fragment Indicator ===
+
== FragmentIndicator ==
 +
This is "nn::ncm::FragmentIndicator".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 522: Line 584:
 
| 0x0
 
| 0x0
 
| 0x2
 
| 0x2
−
| Content Info Index
+
| ContentInfoIndex
 
|-
 
|-
 
| 0x2
 
| 0x2
 
| 0x2
 
| 0x2
−
| Fragment Index
+
| FragmentIndex
 
|}
 
|}
  
−
== Delta Extended Data ==
+
= DeltaMetaExtendedData =
 +
This is "nn::ncm::DeltaMetaExtendedData".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 539: Line 602:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Source Patch ID
+
| SourcePatchId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x8
 
| 0x8
−
| Destination Patch ID
+
| DestinationPatchId
 
|-
 
|-
 
| 0x10
 
| 0x10
 
| 0x4
 
| 0x4
−
| Source Version
+
| SourceVersion
 
|-
 
|-
 
| 0x14
 
| 0x14
 
| 0x4
 
| 0x4
−
| Destination Version
+
| DestinationVersion
 
|-
 
|-
 
| 0x18
 
| 0x18
 
| 0x2
 
| 0x2
−
| Fragment Set Count
+
| FragmentSetCount
 
|-
 
|-
 
| 0x1A
 
| 0x1A
Line 562: Line 625:
 
|-
 
|-
 
| 0x20
 
| 0x20
−
| 0x34 * Fragment Set Count
+
| 0x34 * FragmentSetCount
−
| [[CNMT#Fragment_Set|Fragment Sets]]
+
| [[#FragmentSet|FragmentSet]]
 
|-
 
|-
−
|
+
| Variable
−
| 0x4 * Fragment Indicator Count (From [[CNMT#Fragment_Set|Fragment Sets]])
+
| 0x4 * FragmentIndicatorCount (from [[#FragmentSet|FragmentSet]])
−
| [[CNMT#Fragment_Indicator|Fragment Indicators]]
+
| [[#FragmentIndicator|FragmentIndicator]]
 
|}
 
|}
  
−
== Digest ==
+
= Digest =
−
 
 
−
Always found at the end of the file.
 
−
 
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 584: Line 644:
 
| Digest
 
| Digest
 
|}
 
|}
 +
 +
This is a SHA-256 hash always found at the end of the file. The hash is calculated over the CNMT file's contents, but this is only done for the development version of the file which results in its production version counterpart sharing the same hash value.

Latest revision as of 21:27, 15 October 2023

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".

PackagedContentMetaHeader

This is "nn::ncm::PackagedContentMetaHeader".

Offset Size Description
0x0 0x8 Id
0x8 0x4 Version
0xC 0x1 ContentMetaType
0xD 0x1 [17.0.0+] ContentMetaPlatform ([1.0.0-16.1.0] Reserved)
0xE 0x2 ExtendedHeaderSize
0x10 0x2 ContentCount
0x12 0x2 ContentMetaCount
0x14 0x1 ContentMetaAttributes (0=None, 1=IncludesExFatDriver, 2=Rebootless, 4=Compacted)
0x15 0x3 Reserved
0x18 0x4 RequiredDownloadSystemVersion
0x1C 0x4 Reserved

SystemUpdateMetaExtendedHeader

This is "nn::ncm::SystemUpdateMetaExtendedHeader".

Offset Size Description
0x0 0x4 ExtendedDataSize

ApplicationMetaExtendedHeader

This is "nn::ncm::ApplicationMetaExtendedHeader".

Offset Size Description
0x0 0x8 PatchId
0x8 0x4 RequiredSystemVersion
0xC 0x4 RequiredApplicationVersion

PatchMetaExtendedHeader

This is "nn::ncm::PatchMetaExtendedHeader".

Offset Size Description
0x0 0x8 ApplicationId
0x8 0x4 RequiredSystemVersion
0xC 0x4 ExtendedDataSize
0x10 0x8 Reserved

AddOnContentMetaExtendedHeader

This is "nn::ncm::AddOnContentMetaExtendedHeader".

Offset Size Description
0x0 0x8 ApplicationId
0x8 0x4 RequiredApplicationVersion
0xC 0x1 [15.0.0+] ContentAccessibilities ([1.0.0-14.1.2] Reserved)
0xD 0x3 Reserved
0x10 0x8 [15.0.0+] DataPatchId

DeltaMetaExtendedHeader

This is "nn::ncm::DeltaMetaExtendedHeader".

Offset Size Description
0x0 0x8 ApplicationId
0x8 0x4 ExtendedDataSize
0xC 0x4 Reserved

DataPatchMetaExtendedHeader

This is "nn::ncm::DataPatchMetaExtendedHeader".

This was added with [15.0.0+].

Offset Size Description
0x0 0x8 DataId
0x8 0x8 ApplicationId
0x10 0x4 RequiredApplicationVersion
0x14 0x4 ExtendedDataSize
0x18 0x8 Reserved

PackagedContentInfo

This is "nn::ncm::PackagedContentInfo".

Offset Size Description
0x0 0x20 Hash (SHA256 of the referenced content)
0x20 0x10 ContentId
0x30 [15.0.0+] 0x5 ([1.0.0-14.1.2] 0x6) Size
0x35 0x1 [15.0.0+] ContentAttributes
0x36 0x1 ContentType (0=Meta, 1=Program, 2=Data, 3=Control, 4=HtmlDocument, 5=LegalInformation, 6=DeltaFragment)
0x37 0x1 IdOffset

ContentMetaInfo

This is "nn::ncm::ContentMetaInfo".

Offset Size Description
0x0 0x8 Id
0x8 0x4 Version
0xC 0x1 ContentMetaType
0xD 0x1 ContentMetaAttributes (0=None, 1=IncludesExFatDriver, 2=Rebootless, 4=Compacted)
0xE 0x2 Reserved

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

SystemUpdateMetaExtendedData

This is "nn::ncm::SystemUpdateMetaExtendedData".

If the Version field is 1, the format is:

Offset Size Description
0x0 0x4 Version
0x4 0x4 VariationCount
0x8 0x20 * VariationCount FirmwareVariationInfo (Version 1)

If the Version field is 2, the format is:

Offset Size Description
0x0 0x4 Version
0x4 0x4 VariationCount
0x8 0x4 * VariationCount FirmwareVariationId
Variable 0x20 * VariationCount FirmwareVariationInfo (Version 2)
Variable 0x10 * MetaCount (from FirmwareVariationInfo (Version 2)) ContentMetaInfo (if ReferToBase is False)

FirmwareVariationInfo

This is "FirmwareVariationInfo ".

If the Version field is 1, the format is:

Offset Size Description
0x0 0x4 FirmwareVariationId
0x4 0x1C Reserved

If the Version field is 2, the format is:

Offset Size Description
0x0 0x1 ReferToBase (0=False, 1=True)
0x1 0x3 Reserved
0x4 0x4 MetaCount
0x8 0x18 Reserved

PatchMetaExtendedData

This is "nn::ncm::PatchMetaExtendedData".

Offset Size Description
0x0 0x4 PatchHistoryHeaderCount
0x4 0x4 PatchDeltaHistoryCount
0x8 0x4 PatchDeltaHeaderCount
0xC 0x4 FragmentSetCount
0x10 0x4 PatchHistoryContentInfoCount
0x14 0x4 PatchDeltaPackagedContentInfoCount
0x18 0x4 Reserved
0x1C 0x38 * PatchHistoryHeaderCount PatchHistoryHeader
Variable 0x28 * PatchDeltaHistoryCount PatchDeltaHistory
Variable 0x28 * PatchDeltaHeaderCount PatchDeltaHeader
Variable 0x34 * FragmentSetCount FragmentSet
Variable 0x18 * PatchHistoryContentInfoCount PatchHistoryContentInfo (PackagedContentInfo without the Hash entry)
Variable 0x38 * PatchDeltaPackagedContentInfoCount PatchDeltaPackagedContentInfo
Variable 0x4 * FragmentIndicatorCount (from FragmentSet) FragmentIndicator

PatchHistoryHeader

This is "nn::ncm::PatchHistoryHeader".

Offset Size Description
0x0 0x10 ContentMetaKey
0x10 0x20 Digest
0x30 0x2 ContentInfoCount
0x32 0x6 Reserved

PatchDeltaHistory

This is "nn::ncm::PatchDeltaHistory".

Offset Size Description
0x0 0x8 SourcePatchId
0x8 0x8 DestinationPatchId
0x10 0x4 SourceVersion
0x14 0x4 DestinationVersion
0x18 0x8 DownloadSize
0x20 0x8 Reserved

PatchDeltaHeader

This is "nn::ncm::PatchDeltaHeader".

Offset Size Description
0x0 0x8 SourcePatchId
0x8 8 DestinationPatchId
0x10 0x4 SourceVersion
0x14 0x4 DestinationVersion
0x18 0x2 FragmentSetCount
0x1A 0x6 Reserved
0x20 0x2 ContentInfoCount
0x22 0x6 Reserved

FragmentSet

This is "nn::ncm::FragmentSet".

Offset Size Description
0x0 0x10 SourceContentId
0x10 0x10 DestinationContentId
0x20 0x6 SourceSize
0x26 0x6 DestinationSize
0x2C 0x2 FragmentIndicatorCount
0x2E 0x1 FragmentTargetContentType (0=Meta, 1=Program, 2=Data, 3=Control, 4=HtmlDocument, 5=LegalInformation, 6=DeltaFragment)
0x2F 0x1 UpdateType (0=ApplyAsDelta, 1=Overwrite, 2=Create)
0x30 0x4 Reserved

FragmentIndicator

This is "nn::ncm::FragmentIndicator".

Offset Size Description
0x0 0x2 ContentInfoIndex
0x2 0x2 FragmentIndex

DeltaMetaExtendedData

This is "nn::ncm::DeltaMetaExtendedData".

Offset Size Description
0x0 0x8 SourcePatchId
0x8 0x8 DestinationPatchId
0x10 0x4 SourceVersion
0x14 0x4 DestinationVersion
0x18 0x2 FragmentSetCount
0x1A 0x6 Reserved
0x20 0x34 * FragmentSetCount FragmentSet
Variable 0x4 * FragmentIndicatorCount (from FragmentSet) FragmentIndicator

Digest

Offset Size Description
0x0 0x20 Digest

This is a SHA-256 hash always found at the end of the file. The hash is calculated over the CNMT file's contents, but this is only done for the development version of the file which results in its production version counterpart sharing the same hash value.

Retrieved from "https://switchbrew.org/w/index.php?title=CNMT&oldid=12551"