SshNet.Agent

SSH.NET Extension to authenticate via OpenSSH Agent and PuTTY Pageant

Status

Works on my machine - WIP

.NET Frameworks

• .NET 4.8
• netstandard 2.0
• netstandard 2.1

Note: Only with netstandard 2.1 it contains support for Unix Domain Sockets to use ssh-agent on Linux.

Keys

• ssh-ed25519
• ecdsa-sha2-nistp256
• ecdsa-sha2-nistp384
• ecdsa-sha2-nistp521
• ssh-rsa with 2048, 3072, 4096 or 8192 KeyLength

Features

• Auth
• Adding Keys
• Getting Keys
• Removing Keys
• Removing all Keys

Agent Protocol Documentation

draft-miller-ssh-agent-02

Usage

OpenSSH Agent

var agent = new SshAgent();

var keyFile = new PrivateKeyFile("test.key");
agent.AddIdentity(keyFile);

var keys = agent.RequestIdentities();

using var client = new SshClient("ssh.foo.com", "root", keys);
client.Connect();
Console.WriteLine(client.RunCommand("hostname").Result);

PuTTY Pageant

var agent = new Pageant();

var keyFile = new PrivateKeyFile("test.key");
agent.AddIdentity(keyFile);

var keys = agent.RequestIdentities();

using var client = new SshClient("ssh.foo.com", "root", keys);
client.Connect();
Console.WriteLine(client.RunCommand("hostname").Result);

Resharper Warning

If you want to avoid the Resharper Warning "Co-variant array conversion": https://www.jetbrains.com/help/resharper/CoVariantArrayConversion.html

var agent = new Pageant();

var keyFile = new PrivateKeyFile("test.key");
agent.AddIdentity(keyFile);

var keys = agent.RequestIdentities();

using var client = new SshClient("ssh.foo.com", "root", keys.ToArray<IPrivateKeyFile>());
client.Connect();
Console.WriteLine(client.RunCommand("hostname").Result);