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.

// 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 = chilkat::SshTunnel::new();

// The tunnel forwards accepted local connections to this destination through the SSH server.
tunnel.set_dest_hostname("db.internal.example.com");
tunnel.set_dest_port(5432);

// Connect to the SSH server.  This performs the TCP/proxy connection and SSH handshake, but
// does not authenticate yet.
let ssh_port = 22;
if tunnel.connect("ssh.example.com", ssh_port).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}

// Begin keyboard-interactive authentication to receive the server's prompt(s).
let Ok(info_request_xml) = tunnel.start_keyboard_auth("mySshLogin") else {
    println!("{}", tunnel.last_error_text());
    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.
let password = "mySshPassword".to_string();

// Submit the response (typically the password).  The returned XML indicates the next prompt or
// the final result.
let Ok(result) = tunnel.continue_keyboard_auth(&password) else {
    println!("{}", tunnel.last_error_text());
    return;
};

println!("{}", result);

let wait_for_thread_exit = true;
if tunnel.close_tunnel(wait_for_thread_exit).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}