iTextSharp.text.pdf.security.MakeXmlSignature.VerifyArguments C# (CSharp) Метод

        private static void VerifyArguments(XmlSignatureAppearance sap, IExternalSignature externalSignature) {
            if (sap.GetXmlLocator() == null)
                throw new DocumentException(MessageLocalization.GetComposedMessage("xmllocator.cannot.be.null"));
            if (!externalSignature.GetHashAlgorithm().Equals(SecurityConstants.SHA1))
                throw new UnsupportedPdfException(MessageLocalization.GetComposedMessage("support.only.sha1.hash.algorithm"));

            if (!externalSignature.GetEncryptionAlgorithm().Equals(SecurityConstants.RSA)
                && !externalSignature.GetEncryptionAlgorithm().Equals(SecurityConstants.DSA))
                throw new UnsupportedPdfException(MessageLocalization.GetComposedMessage("support.only.rsa.and.dsa.algorithms"));
        }