*** This bug is a duplicate of bug 1789523 ***
https://bugs.launchpad.net/bugs/1789523
Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1789523, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report. Feel free to continue to report any other bugs you may
find.
** This bug has been marked a duplicate of bug 1789523
The ssh-agent launcher script fails to relaunch ssh-agent
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Packages, which is subscribed to gnome-session in Ubuntu.
https://bugs.launchpad.net/bugs/1812247
Title:
ssh-agent fails for ssh-add -c: agent refused operation
Status in gnome-session package in Ubuntu:
New
Bug description:
Ubuntu uses ssh-agent from OpenSSH which supports adding keys by means
of `ssh-add -c` indicating that keys "should be subject to
confirmation before being used for authentication. In Ubuntu 18.10
this fails with the error
sign_and_send_pubkey: signing failed: agent refused operation
To reproduce I used a Ubuntu 18.10 Live "CD", apt-get update && apt-
get upgrade, log out and log back in (these steps are not required but
we want to use an up-to-date system). Then:
$ sudo apt-get install ssh-askpass-gnome
(...)
$ # verify that ssh-askpass shows a popup, confirm with Enter
$ ssh-askpass ; echo $?
0
$ ssh-keygen
(...)
$ ssh-add -D
All identities removed.
$ ssh-copy-id $sshuser@$sshserver
(...)
Number of key(s) added: 1
(...)
$ ssh $sshuser@$sshserver uname -a
Linux server 4.9.0-8-amd64 #1 SMP Debian 4.9.130-2 (2018-10-27) x86_64
GNU/Linux
$ ssh-add -d
Identity removed: /home/ubuntu/.ssh/id_rsa (ubuntu@ubuntu)
$ ssh-add -c
Enter passphrase for /home/ubuntu/.ssh/id_rsa (will confirm each use):
Identity added: /home/ubuntu/.ssh/id_rsa (/home/ubuntu/.ssh/id_rsa)
The user must confirm each use of the key
$ ssh $sshuser@$sshserver uname -a
sign_and_send_pubkey: signing failed: agent refused operation
sshuser@server's password: [^C'ed]
$ ssh-add -l
2048 SHA256:yvAFsTpkNWnlrQyCp+tWV83dIF8Je3AksM0o+Ajvyyc
/home/ubuntu/.ssh/id_rsa (RSA)
So, our key is loaded, ssh-askpass is working (also confirmed with
`ssh-add -c </dev/null`), but authentication fails with
"sign_and_send_pubkey: signing failed: agent refused operation".
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gnome-session-bin 3.30.0-0ubuntu4
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
Uname: Linux 4.18.0-10-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CasperVersion: 1.399
CurrentDesktop: ubuntu:GNOME
Date: Thu Jan 17 17:14:35 2019
ExecutablePath: /usr/lib/gnome-session/gnome-session-binary
LiveMediaBuild: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-session
UpgradeStatus: No upgrade log present (probably fresh install)
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