bug#31337: Unable to use gnuk usb smartcard token on GuixSD

[ludo@gnu.org (Ludovic Courtès)]

Hi Vagrant,

Vagrant Cascadian <vagrant@debian.org> skribis:

> I've been unable to use my gnuk usb smartcard token with gnupg on
> GuixSD, and it appears this is because scdaemon is built without libusb
> support:
>
>       $ gpg --card-status
>       gpg: selecting openpgp failed: No such device
>       gpg: OpenPGP card not available: No such device
>
> Attached is a patch that gets scdaemon working for me and a gnuk...
>
> Unfortunately, enabling libusb causes one of the tets to hang
> indefinitely:
>
>       PASS: tests/openpgp/decrypt-session-key.scm
>       Checking unwrapping the encryption.
>           > encsig-2-keys-3 encsig-2-keys-4 <
>       PASS: tests/openpgp/decrypt-unwrap-verify.scm
>       Checking signing with the default hash algorithm
>           >
>
> So far, I've only been able to get it to work by disabling the
> tests... so it's obviously not a good idea to enable without further
> troubleshooting.

Did you try attaching strace or gdb to the faulty test to see what’s
going on?

It may be that this test depends on the availability of special hardware
or something like that, in which case we should arrange to skip just
this test.

Thanks for looking into it!

Ludo’.