Ubuntu
nemo package

Can't connect to an SSH server using a GPG auth key on a Yubikey

Bug #1925713 reported by Duncan Bayne on 2021-04-23

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	nemo (Ubuntu)	New	Undecided	Unassigned

Bug Description

I have a Raspberry Pi server, which I connect to using a GPG auth key that lives on my Yubikey. For example, from console:

➜ ~ ssh <email address hidden>
Linux nas.local 4.19.66-v7+ #1253 SMP Thu Aug 15 11:49:46 BST 2019 armv7l

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
No mail.
Last login: Fri Apr 23 01:38:54 2021 from 192.168.1.128
pi@nas:~ $

Before the login proceeds, I'm prompted to unlock the Yubikey, and then I touch the Yubikey to permit gpg-agent to use the key. This is all as expected.

However, when I try to connect to the same server from Nemo, I am not prompted either to unlock or touch the Yubikey. Instead I immediately receive the error "Permission denied".

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: nemo 4.6.5-1
ProcVersionSignature: Ubuntu 5.8.0-50.56-generic 5.8.18
Uname: Linux 5.8.0-50-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Apr 23 12:03:41 2021
ExecutablePath: /usr/bin/nemo
InstallationDate: Installed on 2020-11-03 (170 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
RebootRequiredPkgs:
linux-image-5.8.0-50-generic
linux-base
SourcePackage: nemo
UpgradeStatus: No upgrade log present (probably fresh install)