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Renci.SshNet.Common.SshAuthenticationException: Permission denied (publickey) #373
Description
I'm trying to connect to an Ubuntu server with my private key, but I can't get it working
let execution () =
let connectionInfo = new ConnectionInfo(host, "root", new PrivateKeyAuthenticationMethod("./resources/keys/id_rsa"))
use client = new SshClient(connectionInfo)
do client.Connect()
()
do execution ()
The code is a F# script but I guess it's readable.
I tested the file to be reachable (looks like the exception if the path is wrong is the same) and I also tried using the key with ssh cli, succesfully. So the key should be good.
EDIT: the same error occurs using both the NuGet package and the current develop branch on GitHub
EDIT 2: i managed to get it working. This is the working code:
let execution () =
let connectionInfo = new ConnectionInfo(host, "root", new PrivateKeyAuthenticationMethod("root", new PrivateKeyFile("./resources/keys/id_rsa")))
use client = new SshClient(connectionInfo)
do client.Connect()
()
do execution ()
I see it's a bit redundant (having to specify twice the username). Is there a better way, similar to the multi-factor example?
Reacted by starshine
Activity
hovek commentedon Mar 5, 2018
Windows C#, .NET 4.5. I get permission denied just out of the blue, it worked fine and suddenly throws permission denied for every file, FileZilla works fine.
kranz912 commentedon Jun 8, 2018
I got the same issue. It was working on my development machine running windows 10. When I deployed it to our production environment I get this message. Both are pointing to the same private key file.
drieseng commentedon Jun 8, 2018
@gmlion: in the first code snippet you actually specified "./resources/keys/id_rsa" as user name, hence the authentication failure.
I agree that it's a bit weird to specify the user name twice. Please submit a separate issue for this.
drieseng commentedon Jun 8, 2018
@hovek, @kranz912: If you have more information (eg. server logs), please submit a separate issue.
@kranz912: Were you actually accessing the same SSH server on both your development machine and your production environment?
gmlion commentedon Jun 11, 2018
@drieseng The single argument PrivateKeyAuthenticationMethod constructor is used in the multi-factor-authentication example in the README, I suppose it no longer works that way?
hotyes commentedon Jul 7, 2022
hi @gmlion , have you solved this problem ? thanks
igavva commentedon Sep 19, 2023
A simple solution.
Add this line in /etc/ssh/sshd_config.
PubkeyAcceptedAlgorithms +ssh-rsa
Afterwards, restart the sshd service to make the new settings come into effect.
$ sudo systemctl restart sshd
WojciechNagorski commentedon Sep 23, 2023
Fixed by #1177 and #1180
WojciechNagorski commentedon Oct 10, 2023
Version 2023.0.0 has been published https://www.nuget.org/packages/SSH.NET/2023.0.0