Several improvements

[leo60228]

• Run Rustfmt
• Use Rust 2018 idioms (automatic, via cargo fix)
• Fix doctests (previously called the wrong methods; decryption on XTSN still doesn't work)
• Add example for how to decrypt an NCA header

[ThatNerdyPikachu]

👀

[leo60228]

@ThatNerdyPikachu if you want something right now, @roblabla already wrote a fully functional NCA parser and decryptor. Check the PRs in MegatonHammer/linkle. I'm not sure, but I think the reason it hasn't been merged might be because of romfs not being supported.

[roblabla]

It's not merged because I absolutely hate the code. It's over-generic in all the worst ways. I need to rewrite it using more composable interfaces (notably, I want to switch to using a ReadAt/WriteAt trait instead) but haven't found the time or motivation.

[roblabla]

(Also if you need a pure-rust XTS implementation, look at roblabla/block-ciphers@b690b50)

[ThatNerdyPikachu]

@leo60228 Thanks for the suggestion, but I already finished my NCA parser with that library (rob’s XTS) a month ago, lol.

[leo60228]

@ThatNerdyPikachu Is it public?

[ThatNerdyPikachu]

@leo60228 not atm.. I’ll put it up on a gist later tho — it do3s use OpenSSL, which id like to change.