iTextSharp.text.pdf.crypto.StandardDecryption.StandardDecryption C# (CSharp) Метод

        public StandardDecryption(byte[] key, int off, int len, int revision)
        {
            aes = (revision == AES_128 || revision == AES_256);
            if (aes) {
                this.key = new byte[len];
                System.Array.Copy(key, off, this.key, 0, len);
            }
            else {
                arcfour = new ARCFOUREncryption();
                arcfour.PrepareARCFOURKey(key, off, len);
            }
        }