3dbrew

Title metadata: Difference between revisions

← Older edit
3dsguy (talk | contribs)
839 edits
No edit summary
Ihaveamac (talk | contribs)
47 edits
note discrepancy in endianness
 
(12 intermediate revisions by 4 users not shown)
Line 1: Line 1:
[[Category:File formats]]
[[Category:File formats]]
'''Title metadata''' is a format used to store information about a title (a single standalone game, channel, etc.) and all its installed contents, including which contents they consist of and their SHA1 hashes.
'''Title metadata''' is a format used to store information about a title (installed title, DLC, etc.) and all its installed contents, including which contents they consist of and their SHA256 hashes.


[http://git.daifukkat.su/?p=3dshax.git Code is available] by trap15 to parse the available information from the 3DS format of TMDs.
[https://bitbucket.org/trap15/3dshax Code is available] by trap15 to parse the available information from the 3DS format of TMDs.


== Structure ==
== Structure ==


All the data in the file represented in Big Endian.
All the data in the file represented in Big Endian, unless otherwise noted.


=== Header ===
{| class="wikitable"
{| class="wikitable"
| align="center" style="background:#f0f0f0;"|'''Offset'''
| align="center" style="background:#f0f0f0;"|'''Offset'''
| align="center" style="background:#f0f0f0;"|''' '''
| align="center" style="background:#f0f0f0;"|'''Size'''
| align="center" style="background:#f0f0f0;"|'''Size'''
| align="center" style="background:#f0f0f0;"|'''Description'''
| align="center" style="background:#f0f0f0;"|'''Description'''
|-
|-
| ''RSA 2048''||''RSA 4096''||||
| 0x0||Y||Signature Data
|-
| Y ||0xC4||Header
|-
| 0xC4 + Y||0x24*64||Content Info Records.
|-
| 0x9C4 + Y||0x30*ContentCount||Content Chunk Records.
|}
 
Y denotes the total size of the "Signature Data" section and depends on the signature type.
 
=== Signature Data ===
The signature is of the header of the TMD.
{| class="wikitable"
| align="center" style="background:#f0f0f0;"|'''Offset'''
| align="center" style="background:#f0f0f0;"|'''Size'''
| align="center" style="background:#f0f0f0;"|'''Description'''
|-
| 0x0||0x4||Signature Type
|-
| 0x4 ||X||Signature
|-
|-
| 0x000||0x000||4||Signature type
| 0x4 + X|| ||Padding Aligning the signature data to 0x40 bytes
|}
 
==== Signature Type ====
{{Signature Types}}
The hash for the signature, is calculated over the header of the TMD
 
=== Header ===
 
{| class="wikitable"
| align="center" style="background:#f0f0f0;"|'''Offset'''
| align="center" style="background:#f0f0f0;"|'''Size'''
| align="center" style="background:#f0f0f0;"|'''Description'''
|-
|-
| 0x004||0x004||256 / 512||Signature
| 0x0||0x40||Signature Issuer
|-
|-
| 0x104||0x204||60||Padding modulo 64
| 0x40||0x1||Version
|-
|-
| 0x140||0x240||64||Issuer
| 0x41||0x1||ca_crl_version
|-
|-
| 0x180||0x280||1||Version
| 0x42||0x1||signer_crl_version
|-
|-
| 0x181||0x281||1||ca_crl_version
| 0x43||0x1||Reserved
|-
|-
| 0x182||0x282||1||signer_crl_version
| 0x44||0x8||System Version
|-
|-
| 0x183||0x283||1||Padding modulo 64
| 0x4C||0x8||Title ID
|-
|-
| 0x184||0x284||8||System Version
| 0x54||0x4||Title Type
|-
|-
| 0x18C||0x28C||8||Title ID
| 0x58||0x2||Group ID
|-
|-
| 0x194||0x294||4||Title type
| 0x5A||0x4||Save Data Size in Little Endian (Bytes) (Also SRL Public Save Data Size)
|-
|-
| 0x198||0x298||2||Group ID
| 0x5E||0x4||SRL Private Save Data Size in Little Endian (Bytes)
|-
|-
| 0x19A||0x29A||62||reserved
| 0x62||0x4||Reserved
|-
|-
| 0x1D8||0x2D8||4||Access rights
| 0x66||0x1||SRL Flag
|-
|-
| 0x1DC||0x2DC||2||Title version
| 0x67||0x31||Reserved
|-
|-
| 0x1DE||0x2DE||2||Number of contents (contcount)
| 0x98||0x4||Access Rights
|-
|-
| 0x1E0||0x2E0||2||Boot content
| 0x9C||0x2||Title Version
|-
|-
| 0x1E2||0x2E2||2||Padding
| 0x9E||0x02||Content Count
|-
|-
| 0x1E4||0x2E4||32||SHA-256 hash of the 36*64 byte long content info record blob (next field)
| 0xA0||0x2||Boot Content
|-
|-
| 0x204||0x304||36*64||Content info records
| 0xA2||0x2||Padding
|-
|-
| 0xB04||0xC04||48*contcount|| Content chunk records
| 0xA4||0x20||SHA-256 Hash of the Content Info Records
|}
|}


=== Content info records ===
=== Content Info Records ===
 
There are 64 of these records, usually only the first is used.
 
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 76: Line 109:
|-
|-
| 0x04
| 0x04
| 32
| 0x20
| SHA-256 hash of the next k content records that have not been hashed yet
| SHA-256 hash of the next k content records that have not been hashed yet
|}
|}


=== Content chunk records ===
=== Content chunk records ===
There is one of these for each content contained in this title. (Determined by "Content Count" in the TMD Header).
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 104: Line 139:
|-
|-
| 0x10
| 0x10
| 32
| 0x20
| SHA-256 hash
| SHA-256 hash
|}
|}
=== Content Index ===
==== Content Index ====


This indicates the content type:
This indicates the content type:
Line 126: Line 161:
|}
|}


=== Content Type flags ===
This does not apply to DLC.
 
==== Content Type flags ====
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 149: Line 186:


== Certificate Chain ==
== Certificate Chain ==
If the TMD file is obtained from Nintendo's CDN, then it will have two certificates appended at the end of the file:
If the TMD file is obtained from Nintendo's CDN, then it will have two [[Certificates|certificates]] appended at the end of the file:


{| class="wikitable" border="1"
{| class="wikitable" border="1"
Retrieved from "https://www.3dbrew.org/wiki/Title_metadata"