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
0x000	4	Signature type
0x004	*	Signature
0x104	60	Padding modulo 64
0x140	64	Issuer
0x180	1	Version
0x181	1	ca_crl_version
0x182	1	signer_crl_version
0x183	1	Padding modulo 64
0x184	8	System Version
0x18C	8	Title ID
0x194	4	Title type
0x198	2	Group ID
0x19A	62	reserved
0x1D8	4	Access rights
0x1DC	2	Title version
0x1DE	2	Number of contents
0x1E0	64	Content Records
0x220	40	Padding modulo 64
0x248	4	Boot content
0x252	4	Banner content
0x256	4	Banner size
0x260	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;