Hacking Wii U - Decrypting Disc Images, Common Key and Cemu?

[7ank0v1c]

Hey Guys,

So I am very new to the Wii U scene, and quite late to the party if I might add

I am currently trying to back up my own Wii U games I have on disc. I have successfully copied the content onto my SD, by using the disc2app homebrew software. However, I have gotten stuck, as I am trying to decrypt the images now, in order to be able to play them on Cemu.

I have tried a few things, but a little lost. Could anyone maybe help me, please?

Also on my travels, I have come across the term 'common key'? Could someone explain that to me, please? I know each disc has a key, but don't know what this 'common key' is.

Thanks in advance guys

 

[BaamAlex]

The common key is the "shared secret" that exists on the Wii, the Wii U and the Nintendo DSi. On the Wii he was extracted using the Tweezer Attack. The key is known to all devices, but never used directly. Instead, all titles are encrypted with a random title key, which in turn is encrypted with the common key and stored in the ticket. If the common key is known, almost any content can be decrypted.

 

[dojafoja]

The Common Key is the key that is stored on every WiiU console. It's used to decrypt the encrypted titlekey. In turn, the decrypted titlekey is used to decrypt all the files. For digital titles, decryption is done at the time of install. For disc-based titles, decryption is done at the time of disc loading.

Now that you have used disc2app to dump the encrypted files from your disc, you need to decrypt and then unpack those files. If you are on Windows then just use Cdecrypt. If you are on a POSIX system then use something like this: https://github.com/ihaveamac/wiiu-things

 

[7ank0v1c]

Heya, so I have tried CDecrypt, but it gives me an error saying something about hashes. Are you aware of any known issues maybe? The game im trying is Paper Mario: Color Splash?

Thanks for your help thus far

 

[BaamAlex]

Maybe you try this.

 

[7ank0v1c]

Maybe you try this.

So I tried it, but it just gives me the error in the image below...

Any ideas?

 

[7ank0v1c]

Heya, could someone please help me.

I have done some reading but I am confused as to what I have to do.

The image below is the files I have dumped, I have tried using CDecypt but get the error I posted in the previous comment image.

Someone, please help!!!!.....

 

[BaamAlex]

You can unpack the games with the usb helper.