SFTP Authenticate with a SecureString Password and Private Key

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Demonstrates the Chilkat SFtp.AuthenticateSecPwPk method, which authenticates using SecureString login and password objects together with a private key. The third argument is the SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

// Demonstrates the SFtp.AuthenticateSecPwPk method, which authenticates using SecureString login
// and password objects together with a private key.  The 1st argument is the username, the 2nd
// is the password, and the 3rd is an SshKey private key.

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;
}

// 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();

// Load the SSH private key.  LoadText reads the file's text, which is then imported.
let priv_key = chilkat::SshKey::new();
let Ok(key_text) = priv_key.load_text("qa_data/id_rsa") else {
    println!("{}", priv_key.last_error_text());
    return;
};

if priv_key.from_open_ssh_private_key(&key_text).is_err() {
    println!("{}", priv_key.last_error_text());
    return;
}

// Place the login and password into SecureString objects.
let secure_login = chilkat::SecureString::new();
let _ = secure_login.append("mySshLogin");
let secure_password = chilkat::SecureString::new();
let _ = secure_password.append(&password);

if sftp.authenticate_sec_pw_pk(&secure_login, &secure_password, &priv_key).is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

// Step 3: Open the SFTP subsystem.  This must be done after authentication and before any
// file or directory operations.
if sftp.initialize_sftp().is_err() {
    println!("{}", sftp.last_error_text());
    return;
}

println!("Authenticated.");

sftp.disconnect();