iTextSharp.text.pdf.security.CrlVerifier.IsSignatureValid C# (CSharp) Méthode

        public bool IsSignatureValid(X509Crl crl, X509Certificate crlIssuer)
        {
            // check if the CRL was issued by the issuer
            if (crlIssuer != null) {
                try {
                    crl.Verify(crlIssuer.GetPublicKey());
                    return true;
                } catch (GeneralSecurityException) {
                    LOGGER.Warn("CRL not issued by the same authority as the certificate that is being checked");
                }
            }
            // check the CRL against trusted anchors
            if (certificates == null)
                return false;
            try {
                // loop over the certificate in the key store
                foreach (X509Certificate anchor in certificates) {
                    try {
                        crl.Verify(anchor.GetPublicKey());
                        return true;
                    } catch (GeneralSecurityException) {}
                }
            }
            catch (GeneralSecurityException) {
                return false;
            }
            return false;
        }