JavaScript

Start SSH Keyboard-Interactive Authentication

Demonstrates the Chilkat Ssh.StartKeyboardAuth method, which begins keyboard-interactive authentication. The only argument is the login name. It returns XML describing the server's prompts and whether each response should be echoed. Answer the prompts with ContinueKeyboardAuth.

Background: Keyboard-interactive is the flexible, prompt-driven SSH method — the server sends one or more questions (a password, a one-time code, a security question) and the client answers each. It is how SSH supports two-factor and other challenge-response schemes. The returned XML tells you exactly what to ask the user and whether to mask their input.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

//  Demonstrates the Ssh.StartKeyboardAuth method, which begins keyboard-interactive
//  authentication.  The only argument is the login name.  It returns XML describing the server's
//  prompts and whether each response should be echoed.

var ssh = new CkSsh();

//  Connect to the SSH server.  Port 22 is the usual SSH port.
var sshPort = 22;
success = ssh.Connect("ssh.example.com",sshPort);
if (success == false) {
    console.log(ssh.LastErrorText);
    return;
}

//  Begin keyboard-interactive authentication.  The returned XML describes the prompts.
var infoRequestXml = ssh.StartKeyboardAuth("mySshLogin");
if (ssh.LastMethodSuccess == false) {
    console.log(ssh.LastErrorText);
    return;
}

console.log(infoRequestXml);

//  Answer the prompt(s) with ContinueKeyboardAuth.

ssh.Disconnect();