Title metadata

From 3dbrew
Revision as of 16:49, 12 July 2011 by Neimod (talk | contribs)
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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.



Start Length 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
0x204 0x304 36*64 Content info records
0xB04 0xC04 48*contcount Content chunk records

Content info records

Start Length Description
0x00 2 Content index offset
0x02 2 Content command count
0x04 32 SHA-256 hash? Commands?

Content chunk records

Start Length 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


Start Length 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.