27
edits
Changes
no edit summary
Line 107:
Line 107:
===Part F: Cleartext certificates===
===Part F: Cleartext certificates===
This part is not encrypted. The exact details of this field is not yet analyzed, but it is likely related to the chain of certificates as described on the [[Tmd_file_structure|TMD file format]] page.
This part is not encrypted. The exact details of this field is not yet analyzed, but it is likely related to the chain of certificates as described on the [[Tmd_file_structure|TMD file format]] page.
+
+===Part G: Making back-ups / copies of a channel / VC game ===
+Disclaimer: This is only legal to do when you have the right to use the VC game / channel, in other words: when you have bought the VC game or channel, or when it is/was free. Also, you're only allowed to install the software at one Wii at a time, and only on a Wii you own. Of course you may create homebrew channels too, and copy them as many times as you like.
+
+As said above, the Wii channels and VC games are encrypted by two AES/RSA keys. The first part (the header) is encrypted by a public key, which is the same on every Wii system. This explains why you can see what Wii channels/VC games are on a SD card on every Wii. The key used to encrypt the header is called the SD Key.
+The second part includes the software itself. It is encrypted with a key unique to each console. This explains why you can only copy software back to the Wii on which it was copied to the SD Card.
+The third part includes several checksums and certificates, for which I refer to the explanations above.
+
+The only way to copy Wii channels / VC games for use on another Wii is decompiling them on the Wii itself or on the computer. If this has been done, you obtain a WAD file, which is in fact slightly reverse engineered version of the original file.
+
+With the homebrew application WAD Packer it is then possible to convert the WAD file on the SD Card to a compiled version in your Wii NAND Memory. The installation can only be done on the Wii itself. When this is done, the WAD Installer gets your Wii unique key, and encrypts the WAD Package with this one. Once the installation is done, the new channel / VC game appears in the Wii menu, and you are able to use it as it was genuine. Further, it is then possible to copy the channels/games to an SD card, but again, when using this way, it can only be copied back to the Wii it was copied from.
[[Category:File formats]]
[[Category:File formats]]