mcs/class/System.Security/System.Security.Cryptography.Xml/XmlDsigXsltTransform.cs

   1 //
   2 // XmlDsigEnvelopedSignatureTransform.cs -
   3 //      Enveloped Signature Transform implementation for XML Signature
   4 // http://www.w3.org/TR/1999/REC-xslt-19991116
   5 //
   6 // Author:
   7 //      Sebastien Pouliot (spouliot@motus.com)
   8 //      Atsushi Enomoto (atsushi@ximian.com)
   9 //
  10 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
  11 // (C) 2004 Novell Inc.
  12 //
  13
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System.IO;
  36 using System.Xml;
  37 using System.Xml.Xsl;
  38
  39 namespace System.Security.Cryptography.Xml
  40 {
  41
  42         public class XmlDsigXsltTransform : Transform
  43         {
  44
  45                 private Type [] input;
  46                 private Type [] output;
  47                 private bool comments;
  48                 private XmlNodeList xnl;
  49                 private XmlDocument inputDoc;
  50
  51                 public XmlDsigXsltTransform () : this (false)
  52                 {
  53                 }
  54
  55                 public XmlDsigXsltTransform (bool includeComments)
  56                 {
  57                         comments = includeComments;
  58                         Algorithm = "http://www.w3.org/TR/1999/REC-xslt-19991116";
  59                 }
  60
  61                 public override Type [] InputTypes {
  62                         get {
  63                                 if (input == null) {
  64                                         lock (this) {
  65                                                 // this way the result is cached if called multiple time
  66                                                 input = new Type [3];
  67                                                 input [0] = typeof (System.IO.Stream);
  68                                                 input [1] = typeof (System.Xml.XmlDocument);
  69                                                 input [2] = typeof (System.Xml.XmlNodeList);
  70                                         }
  71                                 }
  72                                 return input;
  73                         }
  74                 }
  75
  76                 public override Type [] OutputTypes {
  77                         get {
  78                                 if (output == null) {
  79                                         lock (this) {
  80                                                 // this way the result is cached if called multiple time
  81                                                 output = new Type [1];
  82                                                 output [0] = typeof (System.IO.Stream);
  83                                         }
  84                                 }
  85                                 return output;
  86                         }
  87                 }
  88
  89                 protected override XmlNodeList GetInnerXml ()
  90                 {
  91                         return xnl;
  92                 }
  93
  94                 public override object GetOutput ()
  95                 {
  96                         XmlResolver resolver = GetResolver ();
  97
  98                         XslTransform xsl = new XslTransform ();
  99                         XmlDocument doc = new XmlDocument ();
 100 #if NET_1_1
 101                         doc.XmlResolver = resolver;
 102 #endif
 103                         foreach (XmlNode n in xnl)
 104                                 doc.AppendChild (doc.ImportNode (n, true));
 105 #if NET_1_1
 106                         xsl.Load (doc, resolver);
 107 #else
 108                         xsl.Load (doc);
 109 #endif
 110
 111                         if (inputDoc == null)
 112                                 throw new NullReferenceException ("Load input document before transformation.");
 113
 114                         MemoryStream stream = new MemoryStream ();
 115                         // only possible output: Stream
 116 #if NET_1_1
 117                         xsl.XmlResolver = resolver;
 118 #endif
 119                         xsl.Transform (inputDoc, null, stream);
 120
 121                         stream.Seek (0, SeekOrigin.Begin);
 122                         return stream;
 123                 }
 124
 125                 public override object GetOutput (Type type)
 126                 {
 127                         if (type != Type.GetType ("System.IO.Stream"))
 128                                 throw new ArgumentException ("type");
 129                         return GetOutput ();
 130                 }
 131
 132                 public override void LoadInnerXml (XmlNodeList nodeList)
 133                 {
 134                         if (nodeList == null)
 135                                 throw new CryptographicException ("nodeList");
 136                         xnl = nodeList;
 137                 }
 138
 139                 public override void LoadInput (object obj)
 140                 {
 141                         // possible input: Stream, XmlDocument, and XmlNodeList
 142                         if (obj is Stream) {
 143                                 inputDoc = new XmlDocument ();
 144 #if NET_1_1
 145                                 inputDoc.XmlResolver = GetResolver ();
 146 #endif
 147                                 inputDoc.Load (obj as Stream);
 148                         }
 149                         else if (obj is XmlDocument) {
 150                                 inputDoc= obj as XmlDocument;
 151                         }
 152                         else if (obj is XmlNodeList) {
 153                                 inputDoc = new XmlDocument ();
 154 #if NET_1_1
 155                                 inputDoc.XmlResolver = GetResolver ();
 156 #endif
 157                                 XmlNodeList nl = (XmlNodeList) obj;
 158                                 for (int i = 0; i < nl.Count; i++)
 159                                         inputDoc.AppendChild (inputDoc.ImportNode (nl [i], true));
 160                         }
 161                 }
 162         }
 163 }