I don't know which is more frightening, your code or that you think you've done something wonderful.

Your code is unreadable and you provide no documentation for how you intend others to use it.

How is it that you can undo a one-way digest?

What is round? You don't define it and it's not obvious that you imported it (or from where you imported). Goes back to lack of documentation.

Why should you not be nominated for Schneier's DogHouse this month?