Rust

Set the FTP Password from a SecureString

Demonstrates the Chilkat Ftp2.SetSecurePassword method, which sets the login password from a SecureString. The only argument is the SecureString. It is equivalent to setting the Password property but avoids holding the password as an ordinary immutable string.

Background: An ordinary string password can linger in memory (and in memory dumps) because strings are immutable and copied freely. A SecureString keeps the value encrypted under a session key and clears it deterministically, reducing that exposure — a sensible upgrade for a credential the process holds for the life of the connection. Populate it from a runtime source rather than a hard-coded literal.

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Rust


// Demonstrates the Ftp2.SetSecurePassword method, which sets the login password from a
// SecureString.  The only argument is the SecureString.  This avoids holding the password as an
// ordinary immutable string.

let ftp = chilkat::Ftp2::new();

ftp.set_hostname("ftp.example.com");
ftp.set_username("myFtpLogin");

// 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 = "myPassword".to_string();

// Place the password into a SecureString, which keeps it encrypted in memory.
let secure_password = chilkat::SecureString::new();
let _ = secure_password.append(&password);

// Setting the secure password is equivalent to setting the Password property, but more
// protective.
if ftp.set_secure_password(&secure_password).is_err() {
    println!("{}", ftp.last_error_text());
    return;
}

if ftp.connect().is_err() {
    println!("{}", ftp.last_error_text());
    return;
}

println!("Connected using a secure password.");

if ftp.disconnect().is_err() {
    println!("{}", ftp.last_error_text());
    return;
}