Difference between revisions of "CNMT"

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(Update header and extended header - next is extended data)
(Fix new field name)
(15 intermediate revisions by 5 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"
+
= PackagedContentMetaHeader =
−
* "AddOnContent_{lower-case hex titleID}.cnmt"
+
This is "nn::ncm::PackagedContentMetaHeader".
−
* "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 ==
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 21: Line 14:
 
| 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|ContentMetaType]]
 
|-
 
|-
 
| 0xD
 
| 0xD
 
| 0x1
 
| 0x1
−
| Unused
+
| 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
−
| Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
+
| ContentMetaAttributes (0=None, 1=IncludesExFatDriver, 2=Rebootless, 4=Compacted)
 
|-
 
|-
 
| 0x15
 
| 0x15
 
| 0x3
 
| 0x3
−
| Unused
+
| Reserved
 
|-
 
|-
 
| 0x18
 
| 0x18
 
| 0x4
 
| 0x4
−
| Required Download System Version
+
| RequiredDownloadSystemVersion
 
|-
 
|-
 
| 0x1C
 
| 0x1C
 
| 0x4
 
| 0x4
−
| Unused
+
| Reserved
 
|}
 
|}
  
−
== SystemUpdate Extended Header ==
+
= SystemUpdateMetaExtendedHeader =
 +
This is "nn::ncm::SystemUpdateMetaExtendedHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 73: Line 68:
 
| 0x0
 
| 0x0
 
| 0x4
 
| 0x4
−
| Extended Header Size
+
| ExtendedDataSize
 
|}
 
|}
  
−
== Application Extended Header ==
+
= ApplicationMetaExtendedHeader =
 +
This is "nn::ncm::ApplicationMetaExtendedHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 85: Line 82:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Patch ID
+
| PatchId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x4
 
| 0x4
−
| Required System Version
+
| RequiredSystemVersion
 +
|-
 +
| 0xC
 +
| 0x4
 +
| RequiredApplicationVersion
 
|}
 
|}
  
−
== Patch Extended Header ==
+
= PatchMetaExtendedHeader =
 +
This is "nn::ncm::PatchMetaExtendedHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 101: 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
 +
| 0x8
 +
| Reserved
 +
|}
 +
 
 +
= 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
 
| 0x10
 
| 0x8
 
| 0x8
−
| Unused
+
| [15.0.0+] DataPatchId
 
|}
 
|}
  
−
== AddOnContent Extended Header ==
+
= DeltaMetaExtendedHeader =
 +
This is "nn::ncm::DeltaMetaExtendedHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 125: Line 160:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Application ID
+
| ApplicationId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 0x4
 
| 0x4
−
| Required Application Version
+
| ExtendedDataSize
 
|-
 
|-
 
| 0xC
 
| 0xC
 
| 0x4
 
| 0x4
−
| Unused
+
| Reserved
 
|}
 
|}
  
−
== 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 145: Line 184:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Application ID
+
| DataId
 
|-
 
|-
 
| 0x8
 
| 0x8
 +
| 0x8
 +
| ApplicationId
 +
|-
 +
| 0x10
 
| 0x4
 
| 0x4
−
| Extended Data Size
+
| RequiredApplicationVersion
 
|-
 
|-
−
| 0xC
+
| 0x14
 
| 0x4
 
| 0x4
−
| Unused
+
| ExtendedDataSize
 +
|-
 +
| 0x18
 +
| 0x8
 +
| Reserved
 
|}
 
|}
  
−
== Content records ==
+
= PackagedContentInfo =
 +
This is "nn::ncm::PackagedContentInfo".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 166: Line 214:
 
| 0x0
 
| 0x0
 
| 0x20
 
| 0x20
−
| Hash
+
| Hash (SHA256 of the referenced content)
 
|-
 
|-
 
| 0x20
 
| 0x20
 
| 0x10
 
| 0x10
−
| Content ID
+
| ContentId
 
|-
 
|-
 
| 0x30
 
| 0x30
−
| 0x6
+
| [15.0.0+] 0x5 ([1.0.0-14.1.2] 0x6)
 
| Size
 
| Size
 +
|-
 +
| 0x35
 +
| 0x1
 +
| [15.0.0+] ContentAttributes
 
|-
 
|-
 
| 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]])
+
| 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
 
|}
 
|}
  
−
== Meta records ==
+
= ContentMetaInfo =
 +
This is "nn::ncm::ContentMetaInfo".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 195: Line 248:
 
| 0x0
 
| 0x0
 
| 0x8
 
| 0x8
−
| Title ID
+
| Id
 
|-
 
|-
 
| 0x8
 
| 0x8
Line 203: Line 256:
 
| 0xC
 
| 0xC
 
| 0x1
 
| 0x1
−
| [[NCM_services#Title_Types|Meta Type]]
+
| [[NCM_services#Title_Types|ContentMetaType]]
 
|-
 
|-
 
| 0xD
 
| 0xD
 
| 0x1
 
| 0x1
−
| Attributes (0=None, 1=IncludesExFatDriver, 2=Rebootless)
+
| ContentMetaAttributes (0=None, 1=IncludesExFatDriver, 2=Rebootless, 4=Compacted)
 
|-
 
|-
 
| 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 ==
+
= SystemUpdateMetaExtendedData =
−
 
+
This is "nn::ncm::SystemUpdateMetaExtendedData".
−
Patch-type cnmt files include an extended data section.  
 
  
 +
If the Version field is 1, the format is:
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 227: Line 280:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 4
+
| 0x4
−
| Number of previous cnmt entries.
+
| Version
 
|-
 
|-
 
| 0x4
 
| 0x4
−
| 4
+
| 0x4
−
| Number of previous delta entries.
+
| VariationCount
 
|-
 
|-
 
| 0x8
 
| 0x8
−
| 4
+
| 0x20 * VariationCount
−
| Number of delta info entries.
+
| [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 1)
 +
|}
 +
 
 +
If the Version field is 2, the format is:
 +
{| class="wikitable" border="1"
 
|-
 
|-
−
| 0xC
+
! Offset
−
| 4
+
! Size
−
| Number of delta application info entries.
+
! Description
 
|-
 
|-
−
| 0x10
+
| 0x0
−
| 4
+
| 0x4
−
| Number of previous content entries.
+
| Version
 
|-
 
|-
−
| 0x14
+
| 0x4
−
| 4
+
| 0x4
−
| Number of delta content entries.
+
| VariationCount
 
|-
 
|-
−
| 0x18
+
| 0x8
−
| 4
+
| 0x4 * VariationCount
−
| Unused?
+
| FirmwareVariationId
 
|-
 
|-
−
| 0x1C
+
| Variable
−
| 0x38*X
+
| 0x20 * VariationCount
−
| Previous cnmt entries
+
| [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 2)
 
|-
 
|-
−
|  
+
| Variable
−
| 0x28*X
+
| 0x10 * MetaCount (from [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 2))
−
| Previous delta entries
+
| [[#ContentMetaInfo|ContentMetaInfo]] (if ReferToBase is False)
 +
|}
 +
 
 +
== FirmwareVariationInfo ==
 +
This is "FirmwareVariationInfo ".
 +
 
 +
If the Version field is 1, the format is:
 +
{| class="wikitable" border="1"
 
|-
 
|-
−
|
+
! Offset
−
| 0x28*X
+
! Size
−
| Delta info entries
+
! Description
 
|-
 
|-
−
|  
+
| 0x0
−
| 0x34*X
+
| 0x4
−
| Delta application info entries
+
| FirmwareVariationId
 
|-
 
|-
−
|  
+
| 0x4
−
| 0x18*X
+
| 0x1C
−
| Previous content entries
+
| Reserved
 +
|}
 +
 
 +
If the Version field is 2, the format is:
 +
{| class="wikitable" border="1"
 
|-
 
|-
−
|
+
! Offset
−
| 0x38*X
+
! Size
−
| Delta content entries. (Standard content records)
+
! Description
 
|-
 
|-
−
|  
+
| 0x0
−
| 4
+
| 0x1
−
| Unknown
+
| ReferToBase (0=False, 1=True)
 
|-
 
|-
−
|  
+
| 0x1
−
| 4
+
| 0x3
−
| Unknown
+
| Reserved
 
|-
 
|-
−
|  
+
| 0x4
−
| 4
+
| 0x4
−
| Unknown
+
| MetaCount
 
|-
 
|-
 +
| 0x8
 +
| 0x18
 +
| Reserved
 
|}
 
|}
  
−
== Previous cnmt records ==
+
= PatchMetaExtendedData =
−
 
+
This is "nn::ncm::PatchMetaExtendedData".
−
Each entry is 0x38 bytes:
 
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 303: Line 373:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 8
+
| 0x4
−
| Title ID
+
| PatchHistoryHeaderCount
 +
|-
 +
| 0x4
 +
| 0x4
 +
| PatchDeltaHistoryCount
 
|-
 
|-
 
| 0x8
 
| 0x8
−
| 4
+
| 0x4
−
| Title version
+
| PatchDeltaHeaderCount
 
|-
 
|-
 
| 0xC
 
| 0xC
−
| 1
+
| 0x4
−
| Type (see [[NCM_services#Title_Types|Title Types]])
+
| FragmentSetCount
 +
|-
 +
| 0x10
 +
| 0x4
 +
| PatchHistoryContentInfoCount
 
|-
 
|-
−
| 0xD
+
| 0x14
−
| 3
+
| 0x4
−
| Unused?
+
| PatchDeltaPackagedContentInfoCount
 +
|-
 +
| 0x18
 +
| 0x4
 +
| Reserved
 +
|-
 +
| 0x1C
 +
| 0x38 * PatchHistoryHeaderCount
 +
| [[#PatchHistoryHeader|PatchHistoryHeader]]
 +
|-
 +
| Variable
 +
| 0x28 * PatchDeltaHistoryCount
 +
| [[#PatchDeltaHistory|PatchDeltaHistory]]
 
|-
 
|-
−
| 0x10
+
| Variable
−
| 32
+
| 0x28 * PatchDeltaHeaderCount
−
| Hash
+
| [[#PatchDeltaHeader|PatchDeltaHeader]]
 
|-
 
|-
−
| 0x30
+
| Variable
−
| 2
+
| 0x34 * FragmentSetCount
−
| Unknown
+
| [[#FragmentSet|FragmentSet]]
 
|-
 
|-
−
| 0x32
+
| Variable
−
| 2
+
| 0x18 * PatchHistoryContentInfoCount
−
| Unused?
+
| [[#PackagedContentInfo|PatchHistoryContentInfo]] ([[#PackagedContentInfo|PackagedContentInfo]] without the Hash entry)
 
|-
 
|-
−
| 0x34
+
| Variable
−
| 4
+
| 0x38 * PatchDeltaPackagedContentInfoCount
−
| Unused?
+
| [[#PackagedContentInfo|PatchDeltaPackagedContentInfo]]
 
|-
 
|-
 +
| Variable
 +
| 0x4 * FragmentIndicatorCount (from [[#FragmentSet|FragmentSet]])
 +
| [[#FragmentIndicator|FragmentIndicator]]
 
|}
 
|}
  
−
This contains information on previous metadata files.
+
== PatchHistoryHeader ==
 +
This is "nn::ncm::PatchHistoryHeader".
  
−
== Previous delta records ==
+
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x10
 +
| ContentMetaKey
 +
|-
 +
| 0x10
 +
| 0x20
 +
| Digest
 +
|-
 +
| 0x30
 +
| 0x2
 +
| ContentInfoCount
 +
|-
 +
| 0x32
 +
| 0x6
 +
| Reserved
 +
|}
  
−
Each entry is 0x28 bytes:
+
== PatchDeltaHistory ==
 +
This is "nn::ncm::PatchDeltaHistory".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 349: Line 465:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 8
+
| 0x8
−
| Old title ID
+
| SourcePatchId
 
|-
 
|-
 
| 0x8
 
| 0x8
−
| 8
+
| 0x8
−
| New title ID
+
| DestinationPatchId
 
|-
 
|-
 
| 0x10
 
| 0x10
−
| 4
+
| 0x4
−
| Old title version
+
| SourceVersion
 
|-
 
|-
 
| 0x14
 
| 0x14
−
| 4
+
| 0x4
−
| New title version
+
| DestinationVersion
 
|-
 
|-
 
| 0x18
 
| 0x18
−
| 8
+
| 0x8
−
| Size
+
| DownloadSize
 
|-
 
|-
 
| 0x20
 
| 0x20
−
| 8
+
| 0x8
−
| Unused?
+
| Reserved
−
|-
 
 
|}
 
|}
  
−
This contains information on previous delta patches.
+
== PatchDeltaHeader ==
−
 
+
This is "nn::ncm::PatchDeltaHeader".
−
== Delta info records ==
 
−
 
 
−
Each entry is 0x28 bytes:
 
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 387: Line 499:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 8
+
| 0x8
−
| Old title ID
+
| SourcePatchId
 
|-
 
|-
 
| 0x8
 
| 0x8
 
| 8
 
| 8
−
| New title ID
+
| DestinationPatchId
 
|-
 
|-
 
| 0x10
 
| 0x10
−
| 4
+
| 0x4
−
| Old title version
+
| SourceVersion
 
|-
 
|-
 
| 0x14
 
| 0x14
−
| 4
+
| 0x4
−
| New title version
+
| DestinationVersion
 
|-
 
|-
 
| 0x18
 
| 0x18
−
| 8
+
| 0x2
−
| Some sort of index?
+
| FragmentSetCount
 +
|-
 +
| 0x1A
 +
| 0x6
 +
| Reserved
 
|-
 
|-
 
| 0x20
 
| 0x20
−
| 8
+
| 0x2
−
| Some sort of index?
+
| ContentInfoCount
 
|-
 
|-
 +
| 0x22
 +
| 0x6
 +
| Reserved
 
|}
 
|}
  
−
This contains information on the current delta patch.
+
== FragmentSet ==
−
 
+
This is "nn::ncm::FragmentSet".
−
== Delta application info records ==
 
−
 
 
−
Each entry is 0x34 bytes:
 
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 425: Line 541:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 16
+
| 0x10
−
| Old NcaId
+
| SourceContentId
 
|-
 
|-
 
| 0x10
 
| 0x10
−
| 16
+
| 0x10
−
| New NcaId
+
| DestinationContentId
 
|-
 
|-
 
| 0x20
 
| 0x20
−
| 6
+
| 0x6
−
| Old size
+
| SourceSize
 
|-
 
|-
 
| 0x26
 
| 0x26
−
| 2
+
| 0x6
−
| Upper 2 bytes of the new size
+
| DestinationSize
−
|-
 
−
| 0x28
 
−
| 4
 
−
| Lower 4 bytes of the new size
 
 
|-
 
|-
 
| 0x2C
 
| 0x2C
−
| 2
+
| 0x2
−
| Unknown
+
| FragmentIndicatorCount
 
|-
 
|-
 
| 0x2E
 
| 0x2E
−
| 1
+
| 0x1
−
| Type (see [[NCM_services#Title_Types|Title Types]])
+
| FragmentTargetContentType (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?
+
| UpdateType (0=ApplyAsDelta, 1=Overwrite, 2=Create)
 
|-
 
|-
 
| 0x30
 
| 0x30
−
| 4
+
| 0x4
−
| Unused?
+
| Reserved
−
|-
 
 
|}
 
|}
  
−
This contains information on how to apply deltas to the previous patch.
+
== FragmentIndicator ==
 +
This is "nn::ncm::FragmentIndicator".
  
−
== Previous content records ==
+
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x2
 +
| ContentInfoIndex
 +
|-
 +
| 0x2
 +
| 0x2
 +
| FragmentIndex
 +
|}
  
−
Each entry is 0x18 bytes:
+
= DeltaMetaExtendedData =
 +
This is "nn::ncm::DeltaMetaExtendedData".
  
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 475: Line 601:
 
|-
 
|-
 
| 0x0
 
| 0x0
−
| 16
+
| 0x8
−
| NcaId
+
| SourcePatchId
 +
|-
 +
| 0x8
 +
| 0x8
 +
| DestinationPatchId
 
|-
 
|-
 
| 0x10
 
| 0x10
−
| 6
+
| 0x4
−
| Size
+
| SourceVersion
 +
|-
 +
| 0x14
 +
| 0x4
 +
| DestinationVersion
 
|-
 
|-
−
| 0x16
+
| 0x18
−
| 1
+
| 0x2
−
| Type (see [[NCM_services#Title_Types|Title Types]])
+
| FragmentSetCount
 
|-
 
|-
−
| 0x17
+
| 0x1A
−
| 1
+
| 0x6
−
|  
+
| Reserved
 
|-
 
|-
 +
| 0x20
 +
| 0x34 * FragmentSetCount
 +
| [[#FragmentSet|FragmentSet]]
 +
|-
 +
| Variable
 +
| 0x4 * FragmentIndicatorCount (from [[#FragmentSet|FragmentSet]])
 +
| [[#FragmentIndicator|FragmentIndicator]]
 
|}
 
|}
  
−
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
 +
|}

Revision as of 19:28, 18 October 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".

PackagedContentMetaHeader

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

Offset Size Description
0x0 0x8 Id
0x8 0x4 Version
0xC 0x1 ContentMetaType
0xD 0x1 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

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=11993"