Difference between revisions of "Title metadata"

Revision as of 01:16, 27 February 2012

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.

Code is available by trap15 to parse the available information from the 3DS format of TMDs.

Structure

All the data in the file represented in Big Endian.

Header

Offset		Size	Description
RSA 2048	RSA 4096
0x000	0x000	4	Signature type
0x004	0x004	256 / 512	Signature
0x104	0x204	60	Padding modulo 64
0x140	0x240	64	Issuer
0x180	0x280	1	Version
0x181	0x281	1	ca_crl_version
0x182	0x282	1	signer_crl_version
0x183	0x283	1	Padding modulo 64
0x184	0x284	8	System Version
0x18C	0x28C	8	Title ID
0x194	0x294	4	Title type
0x198	0x298	2	Group ID
0x19A	0x29A	62	reserved
0x1D8	0x2D8	4	Access rights
0x1DC	0x2DC	2	Title version
0x1DE	0x2DE	2	Number of contents (contcount)
0x1E0	0x2E0	2	Boot content
0x1E2	0x2E2	2	Padding
0x1E4	0x2E4	32	SHA-256 hash of the 36*64 byte long content info record blob (next field)
0x204	0x304	36*64	Content info records
0xB04	0xC04	48*contcount	Content chunk records

Content info records

Offset	Size	Description
0x00	2	Content index offset
0x02	2	Content command count [k]
0x04	32	SHA-256 hash of the next k content records that have not been hashed yet

Content chunk records

Offset	Size	Description
0x00	4	Content id
0x04	2	Content index
0x06	2	Content type
0x08	8	Content size
0x10	32	SHA-256 hash

Content type flags

Flags	Description
1	Encrypted
2	Disc
4	CFM (abbreviation for?)
0x4000	Optional
0x8000	Shared

Certificates

Offset	Size	Description
0x000	4	Signature type
0x004	*	Signature
0x104	64	Issuer
0x124	4	Tag
0x128	64	Name
0x168		Key

Example code application

 enum sig_type {
         RSA_2048_SHA256 = 0x00010004,
         RSA_4096_SHA256 = 0x00010003,
         RSA_2048_SHA1   = 0x00010001,
         RSA_4096_SHA1   = 0x00010000
 };

// Sorry I removed the example struct because it is wrong.

@@ Line 9: / Line 9: @@
 === Header ===
 {| class="wikitable"
-| align="center" style="background:#f0f0f0;"|'''Start'''
+| align="center" style="background:#f0f0f0;"|'''Offset'''
 | align="center" style="background:#f0f0f0;"|''' '''
-| align="center" style="background:#f0f0f0;"|'''Length'''
+| align="center" style="background:#f0f0f0;"|'''Size'''
 | align="center" style="background:#f0f0f0;"|'''Description'''
 |-
@@ Line 62: / Line 62: @@
 {| class="wikitable"
 |-
-! Start
+! Offset
-! Length
+! Size
 ! Description
 |-
@@ Line 82: / Line 82: @@
 {| class="wikitable"
 |-
-! Start
+! Offset
-! Length
+! Size
 ! Description
 |-
@@ Line 132: / Line 132: @@
 {| class="wikitable"
 |-
-! Start
+! Offset
-! Length
+! Size
 ! Description
 |-