pub async fn hash_with_key<H, M, K>(
    hash: H,
    message: M,
    key: K
) -> Result<(), OneErr>
where H: Into<BufWrite> + 'static + Send, M: Into<BufRead> + 'static + Send, K: Into<BufRead> + 'static + Send,
Expand description

blake2b hashing scheme