Title metadata

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Revision as of 05:08, 30 March 2011 by WB3000 (talk | contribs) (Multi-column entries for offsets)
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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
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


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;