OpenSSH not requesting PIN code for YubiKey

Damien Miller
Mon, 13 Jul 2020 03:34:37 -0000

On Fri, 10 Jul 2020, Frank Sharkey wrote:

> I set up the YubiKey with OpenSSH 8.2 (Ubuntu client and server) and it
> works. However, it does not do PIN enforcement at SSH login.  It only
> requests the PIN during the set-up process (when the key is being
> generated). Is that the way it's supposed to work?

Assuming you are using this device as a FIDO token (and not PKCS#11),
this is expected. OpenSSH doesn't yet support requiring PINs for keys
except for a couple of corner cases (e.g. resident keys).

I hope to add this before OpenSSH 8.4.

-d