sebastien rey-coyrehourcq 
<sebastien.rey-coyrehourcq@univ-rouen.fr> writes:

> Hi,
>
> I jump into guile world by learning and copy/pasting Dominic 
> Martinez config :)

Nice to know my config helped someone! Sorry it's a bit of a mess, 
I didn't really document anything.

> Everything going pretty well but now i'm blocked with yubikey 
> configuration.
>
> And without yubikey that contain your only private key to 
> sign/decrypt everything, that's a
> little complicated ...
>
> Running "gpg --card-status" my yubikey is correclty 
> detected. That a good news ... BUT
> that's all,
> other command don't work, for example both :
>
> gpg --list-secret-keys
> gpg --list-keys

When you say it doesn't work, do you mean it doesn't list any 
keys? If you have keys on your Yubikey that you used with GPG on a 
different system, you'll have to re-export the key stubs for GPG 
to use the Yubikey for authentication (see 
https://github.com/drduh/YubiKey-Guide#switching-between-two-or-more-yubikeys).

If you're getting other errors, you might need to enable some 
system services. For instance, you need the pcscd service 
(https://guix.gnu.org/manual/devel/en/guix.html#index-pcscd), and 
also the udev rules appropriate for your Yubikey model 
(https://github.com/Yubico/libfido2/blob/main/udev/70-u2f.rules). The 
below snippet should get all Yubikey functionality working:

#+begin_src scheme
(service pcscd-service-type)
(udev-rules-service 'yubikey-rules
                     (udev-rule
                      "70-u2f.rules"
                      (string-append
                       ;; All keys
                       "ACTION!=\"add|change\", 
                       GOTO=\"u2f_end\"\n"
                       ;; Yubikey
                       "KERNEL==\"hidraw*\", "
                       "SUBSYSTEM==\"hidraw\", "
                       "ATTRS{idVendor}==\"1050\", "
                        "ATTRS{idProduct}==\"0113|0114|0115|0116|0120|0121|0200|0402|0403|0406|0407|0410\", 
                        "
                       "TAG+=\"uaccess\", MODE=\"0660\"\n"
                       ;; End all keys
                       "LABEL=\"u2f_end\"")))
#+end_src