Title metadata

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

Header

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
0x1E0	0x2E0	64	Content Records
0x220	0x320	40	Padding modulo 64
0x248	0x348	4	Boot content
0x252	0x352	4	Banner content
0x256	0x356	4	Banner size
0x260	0x360	32	Hash

Content Records

Start	Length	Description
0x00	4	Content ID
0x04	32	SHA-256 Hash

Certificates

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

Example code application

 typedef struct {
         u32 cid;         // content id
         u8  hash[0x20];  // SHA-256 hash
 } content_record;        // size: 0x24 bytes
 
 enum sig_type {
         RSA_2048_SHA256 = 0x00010004,
         RSA_4096_SHA256 = 0x00010003,
         RSA_2048_SHA1   = 0x00010001,
         RSA_4096_SHA1   = 0x00010000
 };
 
 typedef struct {
         u32 sig_type; 
         u8 sig[*];     // * Signature size
         u8 fill1[60];
         u8 issuer[64]; // Root-CA%08x-CP%08x
         u8 version;
         u8 ca_crl_version;
         u8 signer_crl_version;
         u8 fill2;
         u64 sys_version;
         u64 title_id;
         u32 title_type;
         u16 group_id; // publisher
         u8 reserved[62];
         u32 access_rights;
         u16 title_version;
         u16 num_contents;
         content_record contents[0x40];
         u8 padding[0x28];
         u32 boot_content;
         u32 banner_content;
         u32 banner_size;
         u8 hash[0x20]; /* Huh? */
 } tmd;

 //The tmd is then followed by a chain of certificates, where each certificate is of the general form
 typedef struct {
         u32 sig_type;
         u8 sig[*];        // * Signature size
         u8 issuer[64];
         u32 tag;          // identifies what is being signed
         u8 name[64];      // name of thing being signed
         u8 key[...];
 } certificate;