Thanks openssh for responding to a malformed key, not by telling me it's malformed, but instead by asking for a passphrase on a key with no passphrase. That only cost me two hours of my life. :P

We do this kind of things on purpose for example with the servers with IP check. Whenever they try to log in with ssh they get asked for login credentials.

Its fun to see them try for weeks. And they are not bothering another poor soul. I think it even has a name. Pretty sure even.