Start SSH Tunnel Keyboard-Interactive Authentication

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Demonstrates the Chilkat SshTunnel.StartKeyboardAuth method, which begins keyboard-interactive authentication. The only argument is the login name. It returns XML describing the server's prompts, which are answered with ContinueKeyboardAuth.

Background: Keyboard-interactive is the prompt-driven authentication method: the server sends one or more questions — a password, a one-time code, a security question — and the client answers each. This is how a tunnel supports two-factor and other challenge-response schemes. The returned XML says exactly what to ask and whether to mask the input.

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    success := false

    //  Demonstrates the SshTunnel.StartKeyboardAuth method, which begins keyboard-interactive
    //  authentication.  The only argument is the login name.  It returns XML describing the server's
    //  prompts, which are answered with ContinueKeyboardAuth.

    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.  The returned XML describes the server's prompts.
    infoRequestXml := tunnel.StartKeyboardAuth("mySshLogin")
    if tunnel.LastMethodSuccess() == false {
        fmt.Println(tunnel.LastErrorText())
        tunnel.DisposeSshTunnel()
        return
    }

    fmt.Println(*infoRequestXml)

    //  Answer the prompt(s) with ContinueKeyboardAuth, then call BeginAccepting.

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


    tunnel.DisposeSshTunnel()