iTextSharp.text.pdf.PdfString.GetOriginalBytes C# (CSharp) Метод

        public byte[] GetOriginalBytes()
        {
            if (originalValue == null)
                return GetBytes();
            return PdfEncodings.ConvertToBytes(originalValue, null);
        }

        private PdfName GetSignatureHashKey(String signatureName)
        {
            PdfDictionary dic      = acroFields.GetSignatureDictionary(signatureName);
            PdfString     contents = dic.GetAsString(PdfName.CONTENTS);

            byte[] bc = contents.GetOriginalBytes();
            byte[] bt = null;
            if (PdfName.ETSI_RFC3161.Equals(dic.GetAsName(PdfName.SUBFILTER)))
            {
                Asn1InputStream din  = new Asn1InputStream(new MemoryStream(bc));
                Asn1Object      pkcs = din.ReadObject();
                bc = pkcs.GetEncoded();
            }
            bt = HashBytesSha1(bc);
            return(new PdfName(ConvertToHex(bt)));
        }