iTextSharp.text.pdf.PdfPKCS7.GetIssuer C# (CSharp) Метод

        private static Asn1Object GetIssuer(byte[] enc) {
            Asn1InputStream inp = new Asn1InputStream(new MemoryStream(enc));
            Asn1Sequence seq = (Asn1Sequence)inp.ReadObject();
            return (Asn1Object)seq[seq[0] is DerTaggedObject ? 3 : 2];
        }