Rust

SFTP Authenticate with Password and Private Key

Demonstrates the Chilkat SFtp.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The arguments are the username, the password, and an 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.

Background: Most servers require either a password or a public key, not both — but some high-security deployments mandate two-factor SSH, combining something you know (the password) with something you have (the key). This method satisfies that policy in one call. As always, the password should come from a secure source rather than a literal in code.

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Rust


// Demonstrates the SFtp.AuthenticatePwPk method, which authenticates with a server that requires
// BOTH a password and 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;
}

if sftp.authenticate_pw_pk("mySshLogin", &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 with a password and a private key.");

sftp.disconnect();