Set the FTP Password from a SecureString

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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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    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.

    ftp := chilkat.NewFtp2()

    ftp.SetHostname("ftp.example.com")
    ftp.SetUsername("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.
    password := "myPassword"

    //  Place the password into a SecureString, which keeps it encrypted in memory.
    securePassword := chilkat.NewSecureString()
    securePassword.Append(password)

    //  Setting the secure password is equivalent to setting the Password property, but more
    //  protective.
    success = ftp.SetSecurePassword(securePassword)
    if success == false {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        securePassword.DisposeSecureString()
        return
    }

    success = ftp.Connect()
    if success == false {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        securePassword.DisposeSecureString()
        return
    }

    fmt.Println("Connected using a secure password.")

    success = ftp.Disconnect()
    if success == false {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        securePassword.DisposeSecureString()
        return
    }


    ftp.DisposeFtp2()
    securePassword.DisposeSecureString()