Open a Forwarded Channel through an SSH Tunnel

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Demonstrates Socket.SshNewChannel, which opens a port-forwarded channel through an authenticated SSH tunnel to a destination host and port, populating a Socket with the connected channel.

var success = false;

var socket = new CkSocket();

//  Connect to the SSH server and initialize an SSH tunneling session.  Port 22 is conventional but
//  not required.
success = socket.SshOpenTunnel("ssh.example.com",22);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

//  Authenticate the SSH session before opening forwarded channels.
//  The SSH password should come from a secure source rather than being hard-coded.
var sshPassword = "mySshPassword";
success = socket.SshAuthenticatePw("sshUser",sshPassword);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

//  Open a port-forwarded channel through the authenticated SSH tunnel to the destination host and
//  port, populating a Socket with the connected channel.  Set the 3rd argument to true to establish
//  TLS to the destination inside the tunnel.
var bTls = false;
var maxWaitMs = 20000;
var channel = new CkSocket();
success = socket.SshNewChannel("db.internal",5432,bTls,maxWaitMs,channel);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

//  Use the channel socket to send and receive with the destination through the tunnel.
console.log("Forwarded channel opened to the destination.");