Re: tramp (2.6.0.29.1 nil/nil); Tramp crashes when trying to authenticate ssh with yubikey resident-key that requires user to enter FIDO2 PIN

[Michael Albinus]

coder.nova99@mailbox.org writes:

Hi,

> I tested it today and it does let me authenticate the key! But while it's 
> asking me to touch the key, it does display the following text in the buffer
> ```
> File error: [[Regexp ‘^^M*User presence confirmed[
> ^M]*\|^^M*\(Enter PIN for .*\)[
> ^M]*\|^^M*sign_and_send_pubkey: signing failed for .*[
> ^M]*’ not found in 0 secs]]
> ```
> However, once I touch the key, it does let me access the files on the remote 
> machine. So it does seem to be functional other than that!

Thanks for the feedback. Since you are able to access the remote machine
with you PIN-protected yubikey, I've pushed the patch to the
repositories. Will be available on GNU ELPA later this month, as Tramp 2.6.2.2.

The error message ... hmm, it isn't clear to me. One possible reason is
that Tramp has reached a timeout, that means you have waited for a while
until entering the PIN.

Another possibility is that your yubikey shows slightly different
messages while using it. Which yubikey do you use? I have taken a
"YubiKey 5C NFC" for my tests.

Anyway, if the error message persists, pls run the test with
tramp-verbose set to 10, and show the Tramp debug buffer.
 
Best regards, Michael.