sha512

To check that all newtypes (SecretKeys, Poly1305, etc.) implement the correct traits, new testing functions are needed.

For example fn test_traits_secret_key<Secret: Debug + Drop + PartialEq>() {} could be used to check that a secret key implements the needed traits in a test like so:

fn test_traits_secret_key<Secret: Debug + Drop + PartialEq>() {}

#[test]
fn test_implemen

When a user click on file selection, check directory where selected file contains and try to find a .hash file with the same name (but .hash extension). If .hash file exists, read it and show hash value to user.