Hacking NSMB2 DLC Decryption?

[Hiccup]

How would someone, in theory, decrypt the New Super Mario Bros. 2 DLC files (which are stored on the SD card after they are downloaded from the e-shop)?

 

[Quincy]

Decrypting isn't very much the problem. The problem would be re-encrypting them with your keys x'D

 

[loco365]

In theory, or probably in practice, you'd need your per-console key which is stored in the NAND. Once you have access to that, you can then use that key to generate an xorpad to xor your DLC. Then, you'd need to generate a second xorpad, which is the one we can currently do (Providing DLC is stored with this kind of encryption) and decrypt it into content you can then play around with.

 

[Oxybelis]

Or patch kernel to load decrypted DLC.

 

[gamesquest1]

or apply the decrypted DLC to the decrypted rom and re-pack XD

 

[Hiccup]

I'm more interested in unpacking the DLC files, than repacking them.

Unfortunatly, I do not have a homebrew-able 3DS. Would anybody be able to help? You can PM me if you want.

 

[Duo8]

or apply the decrypted DLC to the decrypted rom and re-pack XD

Is that even possible?
Might be very hard, depending on how the 3DS handles DLCs.