Yubico Forum

Hallo all,

I have been playing around with PIV and for multible different reason, all of them are a tale of my idiocy I have managed both enter the PIN and the PUK until it was blocked.

I have not set a management key.

To solve the problem I have reset the key:

yubico-piv-tool -a reset

After that, I could add an SSH key again, and I could set my own PIN again. It all seemed great, but my PUK is still blocked.

I tried to do this:
yubico-piv-tool -a change-puk -P 123456 -N 12345679
Result: The puk code is blocked, you will have to reinitialize the application.

Now, I am still able to use features I care about, but I would rather have this fixed.

Thanks for your help

There are really only two reasons why the the PUK would be blocked:

(1) If you entered the PUK wrong three times, either with yubico-piv-tool or the YubiKey PIV Manager

(2) If you initialized the PIV applet with the YubiKey PIV Manager and left the default setting of "Use PIN as key." This blocks the PUK. The reason for this is discussed here - https://developers.yubico.com/yubikey-p ... t_Key.html (and you can always set a custom Management Key instead, which allows you to set a custom PUK as well)

(1) Yes I did. Sorry if that was not clear. After that I did the reset.

(2) After the reset I might have started 'piv manager'. So are you saying that my setup is perfectly fine and expected?

If, after resetting the PIV applet successfully, you did either (1) or (2), yes that is normal. Once reset, the PIN and PUK retry counters will be at 3 each.