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Tickets are found in many encrypted files used by the Wii (e.g. WAD Files or Wii Discs). Tickets for NAND titles are stored in /ticket, while tickets for discs are stored on the disc itself. Tickets contain the encrypted AES "title key" and the Title ID of the data and are signed by a certificate from a certificate chain (which usually is the same for all titles and stored somewhere on the NAND). So far only tickets with RSA-2048 signatures have been seen. Discs will only work with those signatures because the size of partition ticket is always 0x2a4.

While all Wii titles are available on NUS, most are encrypted with a key found in the ticket; this key is what is purchased with the Wii Shop Channel. Deleting a title using the data management feature of the System Menu leaves the ticket intact; this is responsible for allowing software to be redownloaded. However, tools such as AnyTitle Deleter delete tickets when they delete titles, which removes all traces of the title.

File structure

Start End Length Description
0x000 0x003 0x004 Signature type (always 0x10001 for RSA-2048)
0x004 0x103 0x100 Signature of ticket view by a certificate's key
0x104 0x13F 0x3C Padding (always 0)
0x140 0x2A2 0x162 Ticket view

Ticket view

Start End Length Description
0x000 0x039 0x040 Signature issuer
0x040 0x07B 0x03C ECDH data, used to generate one-time key during install of console specific titles
0x07C 0x07E 0x003 Unused/Padding
0x07F 0x08E 0x010 Title Key, encrypted by Common Key
0x08F 0x08F 0x001 Unknown
0x090 0x097 0x008 ticket_id (used as IV for title key decryption of console specific titles)
0x098 0x09B 0x004 Console ID
0x09C 0x0A3 0x008 Title ID / Initialization Vector (IV) used for AES-CBC encryption
0x0A4 0x0A5 0x002 Unknown, mostly 0xFFFF
0x0A6 0x0A7 0x002 Ticket title version
0x0A8 0x0A9 0x002 Permitted Titles Mask
0x0AA 0x0AD 0x004 Permit mask. The current disc title is ANDed with the inverse of this mask to see if the result matches the Permitted Titles Mask.
0x0AE 0x0AE 0x001 Title Export allowed using PRNG key (1 = allowed, 0 = not allowed)
0x0AF 0x0AF 0x001 Common Key index (2 = Wii U Wii mode, 1 = Korean Common key, 0 = "normal" Common key)
0x0B0 0x0DF 0x030 Unknown. Is all 0 for non-VC, for VC, all 0 except last byte is 1.
0x0E0 0x11F 0x040 Content access permissions (one bit for each content)
0x120 0x121 0x002 Padding (Always 0)
0x122 0x125 0x004 Enable time limit (1 = Enabled, 0 = Disabled)
0x126 0x129 0x004 Time limit (Seconds)
0x12A 0x161 0x038 7 more time_limit structs as above ({int enable, seconds})

To get the title key decrypt the 16 bytes at offset 0x1bf with the Common Key using the Title ID (offset 0x1dc) as the initialization vector (the last 8 bytes of the IV should be zero).