PowerShell

SSH Tunnel Authenticate with a Password

Demonstrates the Chilkat SshTunnel.AuthenticatePw method, which authenticates the SSH connection with a login name and password. The first argument is the login and the second is the password. Connect first, and call BeginAccepting afterward.

Background: Password authentication is the simplest option, but the password is a secret and should never be a hard-coded literal — obtain it from an interactive prompt, an environment variable, or a secrets vault. Public-key authentication is generally preferred for the unattended, long-running services that tunnels often are.

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

$success = $false

#  Demonstrates the SshTunnel.AuthenticatePw method, which authenticates the SSH connection with
#  a login name and password.  The 1st argument is the login and the 2nd is the password.

$tunnel = New-Object Chilkat.SshTunnel

#  The tunnel forwards accepted local connections to this destination through the SSH server.
$tunnel.DestHostname = "db.internal.example.com"
$tunnel.DestPort = 5432

#  Connect to the SSH server.  This performs the TCP/proxy connection and SSH handshake, but
#  does not authenticate yet.
$sshPort = 22
$success = $tunnel.Connect("ssh.example.com",$sshPort)
if ($success -eq $false) {
    $($tunnel.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"

$success = $tunnel.AuthenticatePw("mySshLogin",$password)
if ($success -eq $false) {
    $($tunnel.LastErrorText)
    exit
}

$("Authenticated.")

#  After authenticating, call BeginAccepting to start listening for local connections to forward.

$waitForThreadExit = $true
$success = $tunnel.CloseTunnel($waitForThreadExit)
if ($success -eq $false) {
    $($tunnel.LastErrorText)
    exit
}