Title metadata

typedef unsigned char  u8;
 typedef unsigned short u16;
 typedef unsigned int   u32; 
/* On a 32bit system, long is only 4 bytes- use long long instead */
 typedef unsigned long u64;

typedef struct {
   u32 cid;		// content id
   u16 index;		// # number of the file
   u16  type;
   u64 size;
   u8  hash [20]; 		//  SHA1 hash content
 } content_record; 			// size: 0x24 bytes

enum sig_type {
      RSA_2048 = 0x00010001,
      RSA_4096 = 0x00010000
 };

typedef struct {
        u32 sig_type; 
        u8 sig[256];
        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;
        u16 boot_index;
        u16 fill3;
        content_record contents[num_contents];
 } tmd;

u32 sig_type;  //
  u8 sig[256];   // 256 for RSA_2048, 512 for RSA_4096
  u8 issuer[32];
  u32 tag;  // identifies what is being signed
  u8 name[64]; // name of thing being signed
  u8 key[...];