Ejemplo n.º 1
0
        /// <summary>
        /// Tries to sign the specified XML text.
        /// </summary>
        /// <param name="xmlText">The XML text.</param>
        /// <param name="certificate">The certificate.</param>
        /// <param name="elementName">The name of the element to be signed.</param>
        /// <param name="elementNamespace">The namespace of the element to be signed.</param>
        /// <param name="xmlTextSigned">The initial XML text to which the signature was added.</param>
        /// <param name="useFingerprint">If true the public key of the certificate will be replaced with the fingerprint in the signature.</param>
        /// <returns>True if the signing was possible, false otherwise.</returns>
        public static bool TrySignElement(string xmlText, X509Certificate2 certificate, string elementName, string elementNamespace, out string xmlTextSigned, bool useFingerprint = true)
        {
            xmlTextSigned = null;

            var xmlWholeDocument = new XmlDocument();

            xmlWholeDocument.PreserveWhitespace = true;
            xmlWholeDocument.LoadXml(xmlText);

            if (String.IsNullOrEmpty(elementName))
            {
                return(false);
            }
            if (String.IsNullOrEmpty(elementNamespace))
            {
                return(false);
            }

            // we are signing only an element (part of the big document)
            var elements = xmlWholeDocument.GetElementsByTagName(elementName, elementNamespace);

            if (elements.Count == 0)
            {
                return(false);
            }
            var elementToSign      = elements[0] as XmlElement;
            var xmlElementDocument = new XmlDocument();

            xmlElementDocument.PreserveWhitespace = true;
            xmlElementDocument.LoadXml(elementToSign.OuterXml);

            EmandatesSignatureOperationsService.GetOrCreateContextForSignatureAdding getOrCreateContextForSignatureAdding = (doc, elem) =>
            {
                return(GetOrCreateContextForEmandatesSignatureAdding(doc, elem));
            };

            //todo cip!! you can optimize this one
            XmlElement signatureContainer = getOrCreateContextForSignatureAdding(xmlElementDocument, xmlElementDocument.DocumentElement);

            XmlSignature.Sign(ref xmlElementDocument, certificate, signatureContainer, "", useFingerprint);
            //var xmlSignature = XmlSignature.Sign(ref doc, certificate, xmlContainerElement, "", null, true);

            var newnode = xmlWholeDocument.ImportNode(xmlElementDocument.DocumentElement, true);

            elementToSign.ParentNode.ReplaceChild(newnode, elementToSign);

            var stringWriter  = new StringWriter();
            var xmlTextWriter = XmlWriter.Create(stringWriter);

            xmlWholeDocument.WriteTo(xmlTextWriter);
            xmlTextWriter.Flush();
            xmlTextSigned = stringWriter.GetStringBuilder().ToString();

            return(true);
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Signs the specified XML text.
        /// </summary>
        /// <param name="xmlText">The XML text.</param>
        /// <param name="certificate">The certificate.</param>
        /// <param name="useFingerprint">If true the public key of the certificate will be replaced with the fingerprint in the signature.</param>
        /// <returns>The initial XML text to which the signature was added.</returns>
        public static string SignDocument(string xmlText, X509Certificate2 certificate, bool useFingerprint = true)
        {
            var xmlDoc = new XmlDocument();

            xmlDoc.PreserveWhitespace = true;
            xmlDoc.LoadXml(xmlText);

            XmlSignature.Sign(ref xmlDoc, certificate, xmlDoc.DocumentElement, "", useFingerprint);

            var stringWriter  = new StringWriter();
            var xmlTextWriter = XmlWriter.Create(stringWriter);

            xmlDoc.WriteTo(xmlTextWriter);
            xmlTextWriter.Flush();
            xmlText = stringWriter.GetStringBuilder().ToString();

            return(xmlText);
        }