iTextSharp.text.pdf.PdfEncryption.PadPassword C# (CSharp) Метод

        private byte[] PadPassword(byte[] userPassword)
        {
            byte[] userPad = new byte[32];
            if (userPassword == null) {
            Array.Copy(pad, 0, userPad, 0, 32);
            }
            else {
            Array.Copy(userPassword, 0, userPad, 0, Math.Min(userPassword.Length, 32));
            if (userPassword.Length < 32)
                Array.Copy(pad, 0, userPad, userPassword.Length, 32 - userPassword.Length);
            }

            return userPad;
        }