Each partition starts with a Ticket followed by the TMD followed by three certifications. The offset of the actual partition data is 0x for normal discs and 0x for unencrypted discs discs where 0x61 in the header is non-zero. For discs where 0x61 in the disc header is non-zero, skip this section and go to Decrypted. Such discs don't work on retail consoles. Partition data is encrypted using a key, which can be obtained from the partition header and the master key. The actual partition data starts at an offset into the partition normally 0x , and it is formatted in "clusters" of size 0x 32k.
Each one of these blocks consists of 0x bytes of encrypted SHA-1 hash data, followed by 0x7C00 bytes of encrypted user data. Clusters are aggregated into subgroups of 8 clusters, and 8 subgroups are aggregated into one group of 64 clusters. The plaintext format is as follows:. Finally, the global hash table "H3"; which the partition header points to contains the SHA-1 hash of the last table of each group in the partition.
This table is not encrypted, but it is signed. To build it, take bytes 0xx3DF from any sector in each group in the partition, apply SHA-1, and simply store all of the resulting hashes consecutively.
All in all, each sector includes enough information to trace itself back to the master SHA-1 hash table. As a result, the entire partition is effectively signed.
If anything is changed, the Wii will immediately crash if the master hash table has been updated , or it will crash when it reads any sector in the modified group if the group tables have been updated , any sector in the modified subgroup if the subgroup tables have been updated , or any modified sector if no SHA-1s were updated.
The signature is stored in the TMD. The TMDs for the partition always have one content. The type of that content seems to be always 3, and the SHA1 hash is the SHA1 of the entire 0x bytes of the hash table. The TMD is signed using Nintendo private key. That makes basically impossible to run modified discs. Trucha Signer uses the signing bug to bypass the TMD signature checking, so the SHA1 hash of the master table can be updated, and modified discs can be booted.
Once the Partition Data is decrypted or if it was stored unencrypted to begin with , it follows the same formatting as a Gamecube disc for the most part.
On the Title Database you can find some info about different game discs. Please enable JavaScript to pass antispam protection! Antispam by CleanTalk. Cookies help us deliver our services. By using our services, you agree to our use of cookies.
Thanks for responding though How to do this? Have priiloader installed, boot system while holding reset, go to one of the option menus and disable it.
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