Nintendo Switch Brew

Changes

CNMT (view source)

Revision as of 21:27, 15 October 2023

6,696 bytes added ,  21:27, 15 October 2023
no edit summary
Line 1: Line 1: −
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.
   −
= Metadata file =
+
The official name for CNMT is "PackagedContentMeta".
−
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 3 different filenames used for ".cnmt":
+
= PackagedContentMetaHeader =
−
* "Application_{lower-case hex titleID}.cnmt"
+
This is "nn::ncm::PackagedContentMetaHeader".
−
* "Patch_{lower-case hex titleID}.cnmt"
  −
* "SystemUpdate_{hex titleID}.cnmt"
     −
It starts with a header:
   
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 17: Line 13:  
|-
 
|-
 
| 0x0
 
| 0x0
−
| 8
+
| 0x8
−
| Title ID
+
| Id
 
|-
 
|-
 
| 0x8
 
| 0x8
−
| 4
+
| 0x4
−
|
+
| Version
 
|-
 
|-
 
| 0xC
 
| 0xC
−
| 1
+
| 0x1
−
| Type (see [[Content_Manager_services#Title_Types|Title Types]])
+
| [[NCM_services#ContentMetaType|ContentMetaType]]
 
|-
 
|-
 
| 0xD
 
| 0xD
−
| 1
+
| 0x1
−
|
+
| [17.0.0+] [[NCM_services#ContentMetaPlatform|ContentMetaPlatform]] ([1.0.0-16.1.0] Reserved)
 
|-
 
|-
 
| 0xE
 
| 0xE
−
| 2
+
| 0x2
−
| Offset to table relative to the end of this 0x20-byte header.
+
| ExtendedHeaderSize
 
|-
 
|-
 
| 0x10
 
| 0x10
−
| 2
+
| 0x2
−
| Number of entries
+
| ContentCount
 
|-
 
|-
 
| 0x12
 
| 0x12
−
| 14
+
| 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".
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| ExtendedDataSize
 +
|}
 +
 
 +
= ApplicationMetaExtendedHeader =
 +
This is "nn::ncm::ApplicationMetaExtendedHeader".
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| PatchId
 +
|-
 +
| 0x8
 +
| 0x4
 +
| RequiredSystemVersion
 +
|-
 +
| 0xC
 +
| 0x4
 +
| RequiredApplicationVersion
 +
|}
 +
 
 +
= PatchMetaExtendedHeader =
 +
This is "nn::ncm::PatchMetaExtendedHeader".
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| ApplicationId
 +
|-
 +
| 0x8
 +
| 0x4
 +
| RequiredSystemVersion
 +
|-
 +
| 0xC
 +
| 0x4
 +
| 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
 +
| 0x8
 +
| [15.0.0+] DataPatchId
 +
|}
 +
 
 +
= DeltaMetaExtendedHeader =
 +
This is "nn::ncm::DeltaMetaExtendedHeader".
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| ApplicationId
 +
|-
 +
| 0x8
 +
| 0x4
 +
| ExtendedDataSize
 +
|-
 +
| 0xC
 +
| 0x4
 +
| Reserved
 
|}
 
|}
   −
An optional header can follow, depending on the title type.
+
= DataPatchMetaExtendedHeader =
 +
This is "nn::ncm::DataPatchMetaExtendedHeader".
   −
At the end of the file following the entries is a 0x20-byte block, presumably a hash.
+
This was added with [15.0.0+].  
   −
With update-format, there's additional data after the end of the entries specified in the header and before the ending hash.
+
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| DataId
 +
|-
 +
| 0x8
 +
| 0x8
 +
| ApplicationId
 +
|-
 +
| 0x10
 +
| 0x4
 +
| RequiredApplicationVersion
 +
|-
 +
| 0x14
 +
| 0x4
 +
| ExtendedDataSize
 +
|-
 +
| 0x18
 +
| 0x8
 +
| Reserved
 +
|}
 +
 
 +
= PackagedContentInfo =
 +
This is "nn::ncm::PackagedContentInfo".
   −
== Application header ==
   
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 58: Line 212:  
! Description
 
! Description
 
|-
 
|-
 +
| 0x0
 
| 0x20
 
| 0x20
−
| 8
+
| Hash (SHA256 of the referenced content)
−
| Patch title ID
+
|-
 +
| 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=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
 +
|-
 +
| 0x37
 +
| 0x1
 +
| IdOffset
 +
|}
 +
 
 +
= ContentMetaInfo =
 +
This is "nn::ncm::ContentMetaInfo".
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| Id
 +
|-
 +
| 0x8
 +
| 0x4
 +
| Version
 +
|-
 +
| 0xC
 +
| 0x1
 +
| [[NCM_services#ContentMetaType|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:
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| Version
 +
|-
 +
| 0x4
 +
| 0x4
 +
| VariationCount
 +
|-
 +
| 0x8
 +
| 0x20 * VariationCount
 +
| [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 1)
 +
|}
 +
 
 +
If the Version field is 2, the format is:
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| Version
 +
|-
 +
| 0x4
 +
| 0x4
 +
| VariationCount
 +
|-
 +
| 0x8
 +
| 0x4 * VariationCount
 +
| FirmwareVariationId
 +
|-
 +
| Variable
 +
| 0x20 * VariationCount
 +
| [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 2)
 +
|-
 +
| Variable
 +
| 0x10 * MetaCount (from [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 2))
 +
| [[#ContentMetaInfo|ContentMetaInfo]] (if ReferToBase is False)
 +
|}
 +
 
 +
== FirmwareVariationInfo ==
 +
This is "FirmwareVariationInfo ".
 +
 
 +
If the Version field is 1, the format is:
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x4
 +
| FirmwareVariationId
 +
|-
 +
| 0x4
 +
| 0x1C
 +
| Reserved
 +
|}
 +
 
 +
If the Version field is 2, the format is:
 +
{| class="wikitable" border="1"
 +
|-
 +
! 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".
 +
 
 +
{| class="wikitable" border="1"
 +
|-
 +
! 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|PatchHistoryHeader]]
 +
|-
 +
| Variable
 +
| 0x28 * PatchDeltaHistoryCount
 +
| [[#PatchDeltaHistory|PatchDeltaHistory]]
 +
|-
 +
| Variable
 +
| 0x28 * PatchDeltaHeaderCount
 +
| [[#PatchDeltaHeader|PatchDeltaHeader]]
 +
|-
 +
| Variable
 +
| 0x34 * FragmentSetCount
 +
| [[#FragmentSet|FragmentSet]]
 +
|-
 +
| Variable
 +
| 0x18 * PatchHistoryContentInfoCount
 +
| [[#PackagedContentInfo|PatchHistoryContentInfo]] ([[#PackagedContentInfo|PackagedContentInfo]] without the Hash entry)
 +
|-
 +
| Variable
 +
| 0x38 * PatchDeltaPackagedContentInfoCount
 +
| [[#PackagedContentInfo|PatchDeltaPackagedContentInfo]]
 
|-
 
|-
−
| 0x28
+
| Variable
−
| 8
+
| 0x4 * FragmentIndicatorCount (from [[#FragmentSet|FragmentSet]])
−
|
+
| [[#FragmentIndicator|FragmentIndicator]]
 
|}
 
|}
   −
== Patch header ==
+
== PatchHistoryHeader ==
 +
This is "nn::ncm::PatchHistoryHeader".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 74: Line 438:  
! Description
 
! Description
 
|-
 
|-
 +
| 0x0
 +
| 0x10
 +
| ContentMetaKey
 +
|-
 +
| 0x10
 
| 0x20
 
| 0x20
 +
| Digest
 +
|-
 +
| 0x30
 +
| 0x2
 +
| ContentInfoCount
 +
|-
 +
| 0x32
 +
| 0x6
 +
| Reserved
 +
|}
 +
 +
== PatchDeltaHistory ==
 +
This is "nn::ncm::PatchDeltaHistory".
 +
 +
{| class="wikitable" border="1"
 +
|-
 +
! 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".
 +
 +
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x8
 +
| SourcePatchId
 +
|-
 +
| 0x8
 
| 8
 
| 8
−
| Original title ID
+
| DestinationPatchId
 +
|-
 +
| 0x10
 +
| 0x4
 +
| SourceVersion
 
|-
 
|-
−
| 0x28
+
| 0x14
−
| 8
+
| 0x4
−
|
+
| DestinationVersion
 +
|-
 +
| 0x18
 +
| 0x2
 +
| FragmentSetCount
 +
|-
 +
| 0x1A
 +
| 0x6
 +
| Reserved
 +
|-
 +
| 0x20
 +
| 0x2
 +
| ContentInfoCount
 +
|-
 +
| 0x22
 +
| 0x6
 +
| Reserved
 
|}
 
|}
   −
== Add-on content header ==
+
== FragmentSet ==
 +
This is "nn::ncm::FragmentSet".
 +
 
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
Line 89: Line 539:  
! Size
 
! Size
 
! Description
 
! Description
 +
|-
 +
| 0x0
 +
| 0x10
 +
| SourceContentId
 +
|-
 +
| 0x10
 +
| 0x10
 +
| DestinationContentId
 
|-
 
|-
 
| 0x20
 
| 0x20
−
| 8
+
| 0x6
−
| Application title ID
+
| SourceSize
 +
|-
 +
| 0x26
 +
| 0x6
 +
| DestinationSize
 +
|-
 +
| 0x2C
 +
| 0x2
 +
| FragmentIndicatorCount
 +
|-
 +
| 0x2E
 +
| 0x1
 +
| FragmentTargetContentType (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
 +
|-
 +
| 0x2F
 +
| 0x1
 +
| UpdateType (0=ApplyAsDelta, 1=Overwrite, 2=Create)
 
|-
 
|-
−
| 0x28
+
| 0x30
−
| 8
+
| 0x4
−
|
+
| Reserved
 
|}
 
|}
   −
== Content records ==
+
== FragmentIndicator ==
 +
This is "nn::ncm::FragmentIndicator".
   −
Each entry is 0x38 bytes:
+
{| class="wikitable" border="1"
 +
|-
 +
! Offset
 +
! Size
 +
! Description
 +
|-
 +
| 0x0
 +
| 0x2
 +
| ContentInfoIndex
 +
|-
 +
| 0x2
 +
| 0x2
 +
| FragmentIndex
 +
|}
 +
 
 +
= DeltaMetaExtendedData =
 +
This is "nn::ncm::DeltaMetaExtendedData".
    
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
Line 110: Line 601:  
|-
 
|-
 
| 0x0
 
| 0x0
−
| 32
+
| 0x8
−
| Hash
+
| SourcePatchId
 +
|-
 +
| 0x8
 +
| 0x8
 +
| DestinationPatchId
 +
|-
 +
| 0x10
 +
| 0x4
 +
| SourceVersion
 +
|-
 +
| 0x14
 +
| 0x4
 +
| DestinationVersion
 +
|-
 +
| 0x18
 +
| 0x2
 +
| FragmentSetCount
 +
|-
 +
| 0x1A
 +
| 0x6
 +
| Reserved
 
|-
 
|-
 
| 0x20
 
| 0x20
−
| 16
+
| 0x34 * FragmentSetCount
−
| NcaId [same as first 16-bytes of hash]
+
| [[#FragmentSet|FragmentSet]]
 
|-
 
|-
−
| 0x30
+
| Variable
−
| 6
+
| 0x4 * FragmentIndicatorCount (from [[#FragmentSet|FragmentSet]])
−
| Size, same as the output from [[Content_Manager_services#GetEntrySize]].
+
| [[#FragmentIndicator|FragmentIndicator]]
 +
|}
 +
 
 +
= Digest =
 +
{| class="wikitable" border="1"
 
|-
 
|-
−
| 0x36
+
! Offset
−
| 1
+
! Size
−
| Type (0=meta, 1=program, 2=data, 3=control, 4=offline-manual [[Internet_Browser|html]], 5=legal [[Internet_Browser|html]])
+
! Description
 
|-
 
|-
−
| 0x37
+
| 0x0
−
| 1
+
| 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/wiki/Special:MobileDiff/1277...12551"