/// <summary>
/// Verify the signature of an XML file
/// </summary>
/// <param name="fileName">Filename</param>
/// <returns>True or False</returns>
public static Boolean VerifyXmlFile(String fileName)
{
// Check the args.
if (null == fileName)
{
throw new ArgumentNullException("FileName");
}
// Create a new XML document.
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.PreserveWhitespace = true;
// check the file exists
if (!(System.IO.File.Exists(fileName)))
{
LogManager.Log(LOG_FILE.DRCA_BL, "DigitalSignatureManager.VerifyXMLFile(): File not found: " + fileName);
throw new ArgumentNullException("File not found");
}
// Load the passed XML file into the document.
xmlDocument.Load(fileName);
// Create a new SignedXml object and pass it
// the XML document class.
SignedXml signedXml = new SignedXml(xmlDocument);
// Find the "Signature" node and create a new
// XmlNodeList object.
XmlNodeList nodeList = xmlDocument.GetElementsByTagName("Signature");
// Load the signature node.
signedXml.LoadXml((XmlElement)nodeList[0]);
// Check the signature and return the result.
bool valid = false;
try
{
valid = signedXml.CheckSignature();
}
catch (Exception ex)
{
throw ex;
}
if (valid)
{
LogManager.Log(LOG_FILE.DRCA_BL, "DigitalSignatureManager.VerifyXMLFile(): " + fileName + " verifed OK");
}
else
{
LogManager.Log(LOG_FILE.DRCA_BL, "DigitalSignatureManager.VerifyXMLFile(): " + fileName + " failed verify", System.Diagnostics.EventLogEntryType.Error);
LogManager.AppEventLog("DigitalSignatureManager.VerifyXMLFile(): " + fileName + " failed verify", System.Diagnostics.EventLogEntryType.FailureAudit, 0);
}
return(valid);
}
