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.

Background: This is the second half of the exchange started by StartKeyboardAuth. A server may issue several rounds of prompts, so a robust client loops: submit answers, read the returned XML, and continue until it sees success or failure. On success, BeginAccepting still must be called before the tunnel forwards traffic.

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    success := 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.

    tunnel := chilkat.NewSshTunnel()

    //  The tunnel forwards accepted local connections to this destination through the SSH server.
    tunnel.SetDestHostname("db.internal.example.com")
    tunnel.SetDestPort(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 == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        return
    }

    //  Begin keyboard-interactive authentication to receive the server's prompt(s).
    infoRequestXml := tunnel.StartKeyboardAuth("mySshLogin")
    if tunnel.LastMethodSuccess() == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        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.
    password := "mySshPassword"

    //  Submit the response (typically the password).  The returned XML indicates the next prompt or
    //  the final result.
    result := tunnel.ContinueKeyboardAuth(password)
    if tunnel.LastMethodSuccess() == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        return
    }

    fmt.Println(*result)

    waitForThreadExit := true
    success = tunnel.CloseTunnel(waitForThreadExit)
    if success == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        return
    }


    tunnel.DisposeSshTunnel()