Rust

Continue SFTP Keyboard-Interactive Authentication

Demonstrates the Chilkat SFtp.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, remember that InitializeSftp still must be called before any file operation.

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Rust


// Demonstrates the SFtp.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 sftp = chilkat::SFtp::new();

// Step 1: Connect the SSH transport.  Port 22 is the usual port.
let port = 22;
if sftp.connect("sftp.example.com", port).is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

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

println!("{}", result);

// On success, initialize the SFTP subsystem.
if sftp.initialize_sftp().is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

sftp.disconnect();