PowerShell

SSH Authenticate with Password and Private Key

Demonstrates the Chilkat Ssh.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The first argument is the username, the second is the password, and the third is an SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

Background: Most servers require either a password or a public key, not both — but some high-security configurations mandate multi-factor SSH, combining something you know (the password) with something you have (the key). This method satisfies that policy in one call. As always, the password should come from a secure source rather than a literal in code.

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

$success = $false

#  Demonstrates the Ssh.AuthenticatePwPk method, which authenticates with a server that requires
#  BOTH a password and a private key.  The 1st argument is the username, the 2nd is the
#  password, and the 3rd is an SshKey private key.

$ssh = New-Object Chilkat.Ssh

#  Connect to the SSH server.  Port 22 is the usual SSH port.
$sshPort = 22
$success = $ssh.Connect("ssh.example.com",$sshPort)
if ($success -eq $false) {
    $($ssh.LastErrorText)
    exit
}

#  Normally you would not hard-code the password in source.  You should instead obtain it
#  from an interactive prompt, environment variable, or a secrets vault.
$password = "mySshPassword"

#  Load the SSH private key.  LoadText reads the file's text, which is then imported.
$privKey = New-Object Chilkat.SshKey
$keyStr = $privKey.LoadText("qa_data/id_rsa")
if ($privKey.LastMethodSuccess -eq $false) {
    $($privKey.LastErrorText)
    exit
}

$success = $privKey.FromOpenSshPrivateKey($keyStr)
if ($success -eq $false) {
    $($privKey.LastErrorText)
    exit
}

$success = $ssh.AuthenticatePwPk("mySshLogin",$password,$privKey)
if ($success -eq $false) {
    $($ssh.LastErrorText)
    exit
}

$("Authenticated with password and private key.")

$ssh.Disconnect()