PdfRpt.Core.Security.SignatureWriter.signDetached C# (CSharp) Method

        private void signDetached(PdfSignatureAppearance signAppearance)
        {
            signAppearance.CertificationLevel = PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED;
            var es = new PrivateKeySignature(_asymmetricKeyParameter, "SHA-256");
            MakeSignature.SignDetached(signAppearance, es, _chain, null, null, null, 0, CryptoStandard.CMS);
        }