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

        public bool Verify() {
            if (verified)
                return verifyResult;
            if (sigAttr != null) {
                byte[] msd = new byte[messageDigest.GetDigestSize()];
                sig.BlockUpdate(sigAttr, 0, sigAttr.Length);
                if (RSAdata != null) {
                    messageDigest.DoFinal(msd, 0);
                    messageDigest.BlockUpdate(msd, 0, msd.Length);
                }
                messageDigest.DoFinal(msd, 0);
                verifyResult = (Arrays.AreEqual(msd, digestAttr) && sig.VerifySignature(digest));
            }
            else {
                if (RSAdata != null){
                    byte[] msd = new byte[messageDigest.GetDigestSize()];
                    messageDigest.DoFinal(msd, 0);
                    sig.BlockUpdate(msd, 0, msd.Length);
                }
                verifyResult = sig.VerifySignature(digest);
            }
            verified = true;
            return verifyResult;
        }