pub fn multihash(wanthash: hashtypes, input: Vec<u8>) -> Result<Vec<u8>, String> {
    let ssl_hash: Option<Type> = match wanthash {
        hashtypes::sha1 => Some(Type::SHA1),
        hashtypes::sha2_256 => Some(Type::SHA256),
        hashtypes::sha2_512 => Some(Type::SHA512),
        _ => None,
    };
    match ssl_hash {
        Some(openssl_type) => Ok(hash(openssl_type, input.as_slice()).insert(0, wanthash.to_u8())), // Add the hashtype to the hash.
        None => Err("Sorry, we don't support that hash algorithm yet."),
    };
}