iTextSharp.text.pdf.security.SignaturePermissions.SignaturePermissions C# (CSharp) Метод

        public SignaturePermissions(PdfDictionary sigDict, SignaturePermissions previous)
        {
            if (previous != null) {
                annotationsAllowed &= previous.AnnotationsAllowed;
                fillInAllowed &= previous.FillInAllowed;
                fieldLocks.AddRange(previous.FieldLocks);
            }
            PdfArray reference = sigDict.GetAsArray(PdfName.REFERENCE);
            if (reference != null) {
                for (int i = 0; i < reference.Size; i++) {
                    PdfDictionary dict = reference.GetAsDict(i);
                    PdfDictionary parameters = dict.GetAsDict(PdfName.TRANSFORMPARAMS);
                    if (PdfName.DOCMDP.Equals(dict.GetAsName(PdfName.TRANSFORMMETHOD)))
                        certification = true;

                    PdfName action = parameters.GetAsName(PdfName.ACTION);
                    if (action != null)
                        fieldLocks.Add(new FieldLock(action, parameters.GetAsArray(PdfName.FIELDS)));

                    PdfNumber p = parameters.GetAsNumber(PdfName.P);
                    if (p == null)
                        continue;
                    switch (p.IntValue) {
                    case 1:
                        fillInAllowed = false;
                        break;
                    case 2:
                        annotationsAllowed = false;
                        break;
                    }
                }
            }
        }