// Encrypt the text in the specified XmlDocument.
private static void ShowTransformProperties(XmlDocument xmlDoc)
{
//<Snippet1>
XmlDsigC14NTransform xmlTransform =
new XmlDsigC14NTransform(true);
//</Snippet1>
// Ensure the transform is using the appropriate algorithm.
//<Snippet4>
xmlTransform.Algorithm =
SignedXml.XmlDsigExcC14NTransformUrl;
//</Snippet4>
// Retrieve the XML representation of the current transform.
//<Snippet10>
XmlElement xmlInTransform = xmlTransform.GetXml();
//</Snippet10>
Console.WriteLine("\nXml representation of the current transform: ");
Console.WriteLine(xmlInTransform.OuterXml);
// Retrieve the valid input types for the current transform.
//<Snippet5>
Type[] validInTypes = xmlTransform.InputTypes;
//</Snippet5>
// Verify the xmlTransform can accept the XMLDocument as an
// input type.
for (int i = 0; i < validInTypes.Length; i++)
{
if (validInTypes[i] == xmlDoc.GetType())
{
// Load the document into the transfrom.
//<Snippet12>
xmlTransform.LoadInput(xmlDoc);
//</Snippet12>
//<Snippet3>
XmlDsigC14NTransform secondTransform =
new XmlDsigC14NTransform();
//</Snippet3>
//<Snippet13>
string classDescription = secondTransform.ToString();
//</Snippet13>
// This call does not perform as expected.
// This transform does not contain inner XML elements
//<Snippet11>
secondTransform.LoadInnerXml(xmlDoc.SelectNodes("//."));
//</Snippet11>
break;
}
}
//<Snippet6>
Type[] validOutTypes = xmlTransform.OutputTypes;
//</Snippet6>
for (int i = 0; i < validOutTypes.Length; i++)
{
if (validOutTypes[i] == typeof(System.IO.Stream))
{
try
{
//<Snippet9>
Type streamType = typeof(System.IO.Stream);
MemoryStream outputStream = (MemoryStream)
xmlTransform.GetOutput(streamType);
//</Snippet9>
// Read the CryptoStream into a stream reader.
StreamReader streamReader =
new StreamReader(outputStream);
// Read the stream into a string.
string outputMessage = streamReader.ReadToEnd();
// Close the streams.
outputStream.Close();
streamReader.Close();
// Display to the console the Xml before and after
// encryption.
Console.WriteLine("Encoding the following xml: " +
xmlDoc.OuterXml);
Console.WriteLine("Message encoded: " + outputMessage);
}
catch (Exception ex)
{
Console.WriteLine("Unexpected exception caught: " +
ex.ToString());
}
break;
}
else
{
//<Snippet8>
object outputObject = xmlTransform.GetOutput();
//</Snippet8>
}
}
}
