You can decrypt Wii U games using CDecrypt, but is there any way to re-encrypt them? I'm interested in this because I want to maintain a one-to-one transformation between a more compressible, decrypted format and the encrypted CDN No-Intro format. The benefit of storing the files in a decrypted form is that they compress much better, and can save gigabytes of space (especially for games that have multiple updates).
I was able to achieve this with 3DS titles by using ntool (the "dimensional" version of it) since that could re-encrypt the decrypted CIAs as well as convert back to the CDN format. So basically I was able to convert a CDN to one or more CIA files (one CIA file for each version of the update, which compress wonderfully in a 7-zip archive), and then I could perfectly reproduce the original No-Intro CDNs again by simply converting and re-encrypting all of the corresponding .cia files with ntool.
I'm hoping something analogous exists for the Wii U, but I've not found anything so far. Any ideas, or is this not possible currently?
I was able to achieve this with 3DS titles by using ntool (the "dimensional" version of it) since that could re-encrypt the decrypted CIAs as well as convert back to the CDN format. So basically I was able to convert a CDN to one or more CIA files (one CIA file for each version of the update, which compress wonderfully in a 7-zip archive), and then I could perfectly reproduce the original No-Intro CDNs again by simply converting and re-encrypting all of the corresponding .cia files with ntool.
I'm hoping something analogous exists for the Wii U, but I've not found anything so far. Any ideas, or is this not possible currently?
