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//
// XmlDsigBase64Transform.cs - Base64 Transform implementation for XML Signature
//
// Author:
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
// (C) 2004 Novell (http://www.novell.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Xml;
namespace System.Security.Cryptography.Xml {
// http://www.w3.org/2000/09/xmldsig#base64
public class XmlDsigBase64Transform : Transform {
private CryptoStream cs;
private Type[] input;
private Type[] output;
public XmlDsigBase64Transform ()
{
Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigBase64Transform;
}
public override Type[] InputTypes {
get {
if (input == null) {
input = new Type [3];
input[0] = typeof (System.IO.Stream);
input[1] = typeof (System.Xml.XmlDocument);
input[2] = typeof (System.Xml.XmlNodeList);
}
return input;
}
}
public override Type[] OutputTypes {
get {
if (output == null) {
output = new Type [1];
output[0] = typeof (System.IO.Stream);
}
return output;
}
}
protected override XmlNodeList GetInnerXml ()
{
return null; // THIS IS DOCUMENTED AS SUCH
}
public override object GetOutput ()
{
return (object) cs;
}
public override object GetOutput (Type type)
{
if (type != typeof (System.IO.Stream))
throw new ArgumentException ("type");
return GetOutput ();
}
public override void LoadInnerXml (XmlNodeList nodeList)
{
// documented as not changing the state of the transform
}
public override void LoadInput (object obj)
{
XmlNodeList xnl = null;
Stream stream = null;
if (obj is Stream)
stream = (obj as Stream);
else if (obj is XmlDocument)
xnl = (obj as XmlDocument).SelectNodes ("//.");
else if (obj is XmlNodeList)
xnl = (XmlNodeList) obj;
if (xnl != null) {
stream = new MemoryStream ();
StreamWriter sw = new StreamWriter (stream);
foreach (XmlNode xn in xnl) {
switch (xn.NodeType) {
case XmlNodeType.Attribute:
case XmlNodeType.Text:
case XmlNodeType.CDATA:
case XmlNodeType.SignificantWhitespace:
case XmlNodeType.Whitespace:
sw.Write (xn.Value);
break;
}
}
sw.Flush ();
// ready to be re-used
stream.Position = 0;
}
if (stream != null)
cs = new CryptoStream (stream, new FromBase64Transform (), CryptoStreamMode.Read);
// note: there is no default are other types won't throw an exception
}
}
}
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