Continue SSH Tunnel Keyboard-Interactive Authentication

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Demonstrates the Chilkat SshTunnel.ContinueKeyboardAuth method, which submits a response to a keyboard-interactive prompt. The only argument is the response text; for a request with multiple prompts, an XML response is supplied instead. It returns XML indicating the next prompt or the final result.

func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the SshTunnel.ContinueKeyboardAuth method, which submits a response to a
    //  keyboard-interactive prompt.  The only argument is the response.  For multiple prompts, an XML
    //  response is supplied instead.

    let tunnel = CkoSshTunnel()!

    //  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.
    var sshPort: Int = 22
    success = tunnel.connect(hostname: "ssh.example.com", port: sshPort)
    if success == false {
        print("\(tunnel.lastErrorText!)")
        return
    }

    //  Begin keyboard-interactive authentication to receive the server's prompt(s).
    var infoRequestXml: String? = tunnel.startKeyboardAuth(login: "mySshLogin")
    if tunnel.lastMethodSuccess == false {
        print("\(tunnel.lastErrorText!)")
        return
    }

    //  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.
    var password: String? = "mySshPassword"

    //  Submit the response (typically the password).  The returned XML indicates the next prompt or
    //  the final result.
    var result: String? = tunnel.continueKeyboardAuth(response: password)
    if tunnel.lastMethodSuccess == false {
        print("\(tunnel.lastErrorText!)")
        return
    }

    print("\(result!)")

    var waitForThreadExit: Bool = true
    success = tunnel.closeTunnel(waitForThreads: waitForThreadExit)
    if success == false {
        print("\(tunnel.lastErrorText!)")
        return
    }


}