SSH Tunnel Authenticate with a SecureString Password and Private Key

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Demonstrates the Chilkat SshTunnel.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. Absolute paths may also be used. Supply the path to your own key file.

// Demonstrates the SshTunnel.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 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;
}

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

println!("Authenticated.");

// After authenticating, call BeginAccepting to start listening for local connections to forward.

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