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Cannot perform ssh public key authentication from codeserver terminal.

See original GitHub issue

OS/Web Information

Web Browser:Google Chrome 90.0.4430.85（Official Build）
Local OS: Windows10 20H2 (19042.928)
Remote OS: Debian GNU/Linux 10 (buster)
Remote Architecture: Linux server1 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64 GNU/Linux
code-server --version: 3.9.3 fe2dc2deb08e378069891b622bb62ad1d261d1b1

Steps to Reproduce

1.Execute ssh -T github. 2.An error will be displayed.

sign_and_send_pubkey: signing failed: agent refused operation
git@github.com: Permission denied (publickey).

Expected

Expect to get a response like ssh or COCKPIT(WEBSHELL) as follows

Enter passphrase for key '/home/server/.ssh/id_rsa': 
Hi penM000! You've successfully authenticated, but GitHub does not provide shell access.

Solution

It works properly by discarding the environment variables as follows.

server@server1:~$ ssh -T github
sign_and_send_pubkey: signing failed: agent refused operation
git@github.com: Permission denied (publickey).
server@server1:~$ sudo -E -u `whoami`  ssh -T github
sign_and_send_pubkey: signing failed: agent refused operation
git@github.com: Permission denied (publickey).
server@server1:~$ sudo -u `whoami`  ssh -T github
Enter passphrase for key '/home/server/.ssh/id_rsa': 
Hi penM000! You've successfully authenticated, but GitHub does not provide shell access.

server@server1:~$ sudo su root
root@server1:/home/server# su server
server@server1:~$ ssh -T github
Enter passphrase for key '/home/server/.ssh/id_rsa': 
Hi penM000! You've successfully authenticated, but GitHub does not provide shell access.

Issue Analytics

State:
Created 2 years ago
Comments:7 (3 by maintainers)

Top GitHub Comments

1reaction

penM000commented, Apr 24, 2021

As you mentioned, I made sure that the ssh-agent command was available. I also confirmed that SSH_AUTH_SOCK exists only on codeserver, as shown below.

ssh shell

server@server1:~$ env | grep SSH
SSH_CONNECTION=ip_address 51240 ip_address 22
SSH_CLIENT=ip_address 22
SSH_TTY=/dev/pts/4

code server shell

server@server1:~$ env | grep SSH
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
SSH_AGENT_PID=6733

By deleting SSH_AUTH_SOCK in codeserver’s shell, it worked fine. I wrote unset in the bashrc, and the codeserver shell was restored. Thank you very much for your advice!

server@server1:~$ ssh -T github
sign_and_send_pubkey: signing failed: agent refused operation
git@github.com: Permission denied (publickey).
server@server1:~$ unset SSH_AUTH_SOCK
server@server1:~$ ssh -T github
Enter passphrase for key '/home/server/.ssh/id_rsa': 
Hi penM000! You've successfully authenticated, but GitHub does not provide shell access.

1reaction

code-ashercommented, Apr 23, 2021

Are you using ssh-agent? If the SSH_AUTH_SOCK environment variable exists then unsetting it might cause it to ask for the password normally. Something like:

SSH_AUTH_SOCK= ssh -T github

If that doesn’t help then using ssh -vvv might reveal more information.

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