JavaScript

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.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

//  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.

var ftp = new CkFtp2();

ftp.Hostname = "ftp.example.com";
ftp.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.
var password = "myPassword";

//  Place the password into a SecureString, which keeps it encrypted in memory.
var securePassword = new CkSecureString();
securePassword.Append(password);

//  Setting the secure password is equivalent to setting the Password property, but more
//  protective.
success = ftp.SetSecurePassword(securePassword);
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}

success = ftp.Connect();
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}

console.log("Connected using a secure password.");

success = ftp.Disconnect();
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}