Rust

Start SFTP Keyboard-Interactive Authentication

Demonstrates the Chilkat SFtp.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: rather than assuming a single password, the server sends one or more questions — a password, a one-time code, a security question — and the client answers each. This is how SFTP supports two-factor and other challenge-response schemes. The returned XML tells you exactly what to ask and whether to mask the input.

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Rust


// Demonstrates the SFtp.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.

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.  The returned XML describes the server's prompts.
let Ok(info_request_xml) = sftp.start_keyboard_auth("mySshLogin") else {
    println!("{}", sftp.last_error_text());
    return;
};

println!("{}", info_request_xml);

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

sftp.disconnect();