/// <summary>
/// Verifies the specified XML text signature.
/// </summary>
/// <param name="xmlText">The XML text.</param>
/// <param name="certificate">The certificate.</param>
///<returns>True if the signature is valid, false otherwise</returns>
public static bool VerifyDocument(string xmlText, X509Certificate2 certificate)
{
var xmlDoc = new XmlDocument();
xmlDoc.PreserveWhitespace = true;
xmlDoc.LoadXml(xmlText);
XmlElement signatureElement = XmlSignature.GetElementUnderRoot(xmlDoc.DocumentElement, "Signature", "http://www.w3.org/2000/09/xmldsig#") as XmlElement;
var result = XmlSignature.CheckSignature(xmlDoc, certificate, signatureElement);
return(result);
}
private static XmlElement GetOrCreateContextForEmandatesSignatureAdding(XmlDocument xmlDocument, XmlElement xmlElement)
{
XmlNode mndtAccptncRptNode = XmlSignature.GetElementUnderRoot(xmlElement, "MndtAccptncRpt");
if (mndtAccptncRptNode == null)
{
return(null);
}
// the signature should be placed inside the signed element (more specific, inside a <SplmtryData><Envlp>....</Envlp></SplmtryData> container)
string elemPrefix = !String.IsNullOrEmpty(xmlDocument.Prefix) ? xmlDocument.Prefix + ":" : "";
var splmtryDataElements = xmlDocument.GetElementsByTagName("SplmtryData");
var envlpDataElements = xmlDocument.GetElementsByTagName("Envlp");
XmlElement splmtryDataContainer;
if (splmtryDataElements.Count == 0)
{
splmtryDataContainer = xmlDocument.CreateElement(elemPrefix + "SplmtryData", xmlElement.NamespaceURI);
// append the 'SplmtryData' element at the end of the signed element
mndtAccptncRptNode.AppendChild(splmtryDataContainer);
}
else
{
splmtryDataContainer = splmtryDataElements[0] as XmlElement;
}
XmlElement envlpContainer;
if (envlpDataElements.Count == 0)
{
envlpContainer = xmlDocument.CreateElement(elemPrefix + "Envlp", xmlElement.NamespaceURI);
// append the 'Envlp' into the 'SplmtryData' element
splmtryDataContainer.AppendChild(envlpContainer);
}
else
{
envlpContainer = envlpDataElements[0] as XmlElement;
}
return(envlpContainer);
}
private static XmlElement GetEmandatesSignatureElement(XmlElement xmlElement)
{
XmlNode mndtAccptncRptElement = XmlSignature.GetElementUnderRoot(xmlElement, "MndtAccptncRpt");
if (mndtAccptncRptElement != null)
{
XmlNode splmtryDataElement = XmlSignature.GetElementUnderRoot(mndtAccptncRptElement as XmlElement, "SplmtryData");
if (splmtryDataElement != null)
{
XmlNode envlpElement = XmlSignature.GetElementUnderRoot(splmtryDataElement as XmlElement, "Envlp");
if (envlpElement != null)
{
var sig = XmlSignature.GetElementUnderRoot(envlpElement as XmlElement, "Signature", "http://www.w3.org/2000/09/xmldsig#") as XmlElement;
return(sig);
}
}
}
return(null);
}