(PowerShell) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$ssh = New-Object Chilkat.Ssh

# Set some timeouts, in milliseconds:
$ssh.ConnectTimeoutMs = 5000
$ssh.IdleTimeoutMs = 15000

# Connect to the SSH server.  
# The standard SSH port = 22
# The hostname may be a hostname or IP address.
$hostname = "sftp.example.com"
$port = 22
$success = $ssh.Connect($hostname,$port)
if ($success -ne $true) {
    $($ssh.LastErrorText)
    exit
}

$key = New-Object Chilkat.SshKey

# Read the PEM file into a string variable:
# (This does not load the PEM file into the key.  The LoadText
# method is a convenience method for loading the full contents of ANY text
# file into a string variable.)
$privKey = $key.LoadText("myPrivateKey.pem")
if ($key.LastMethodSuccess -ne $true) {
    $($key.LastErrorText)
    exit
}

# Load a private key from a PEM string:
# (Private keys may be loaded from OpenSSH and Putty formats.
# Both encrypted and unencrypted private key file formats
# are supported.  This example loads an unencrypted private
# key in OpenSSH format.  PuTTY keys typically use the .ppk
# file extension, while OpenSSH keys use the PEM format.
# (For PuTTY keys, call FromPuttyPrivateKey instead.)
$success = $key.FromOpenSshPrivateKey($privKey)
if ($success -ne $true) {
    $($key.LastErrorText)
    exit
}

# Authenticate with the SSH server using the login and
# private key.  (The corresponding public key should've 
# been installed on the SSH server beforehand.)
$success = $ssh.AuthenticatePk("myLogin",$key)
if ($success -ne $true) {
    $($ssh.LastErrorText)
    exit
}

$($ssh.LastErrorText)
$("Public-Key Authentication Successful!")