iTextSharp.text.pdf.PdfReader.GetCertificationLevel C# (CSharp) Метод

        public int GetCertificationLevel() {
            PdfDictionary dic = catalog.GetAsDict(PdfName.PERMS);
            if (dic == null)
                return PdfSignatureAppearance.NOT_CERTIFIED;
            dic = dic.GetAsDict(PdfName.DOCMDP);
            if (dic == null)
                return PdfSignatureAppearance.NOT_CERTIFIED;
            PdfArray arr = dic.GetAsArray(PdfName.REFERENCE);
            if (arr == null || arr.Size == 0)
                return PdfSignatureAppearance.NOT_CERTIFIED;
            dic = arr.GetAsDict(0);
            if (dic == null)
                return PdfSignatureAppearance.NOT_CERTIFIED;
            dic = dic.GetAsDict(PdfName.TRANSFORMPARAMS);
            if (dic == null)
                return PdfSignatureAppearance.NOT_CERTIFIED;
            PdfNumber p = dic.GetAsNumber(PdfName.P);
            if (p == null)
                return PdfSignatureAppearance.NOT_CERTIFIED;
            return p.IntValue;
        }