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