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 = XmlSignature.AlgorithmNamespaces.XmlDsigXsltTransform;
  59                 }
  60
  61                 public override Type [] InputTypes {
  62                         get {
  63                                 if (input == null) {
  64                                         input = new Type [3];
  65                                         input [0] = typeof (System.IO.Stream);
  66                                         input [1] = typeof (System.Xml.XmlDocument);
  67                                         input [2] = typeof (System.Xml.XmlNodeList);
  68                                 }
  69                                 return input;
  70                         }
  71                 }
  72
  73                 public override Type [] OutputTypes {
  74                         get {
  75                                 if (output == null) {
  76                                         output = new Type [1];
  77                                         output [0] = typeof (System.IO.Stream);
  78                                 }
  79                                 return output;
  80                         }
  81                 }
  82
  83                 protected override XmlNodeList GetInnerXml ()
  84                 {
  85                         return xnl;
  86                 }
  87
  88                 public override object GetOutput ()
  89                 {
  90 #if NET_2_0
  91                         if (xnl == null)
  92                                 throw new ArgumentNullException ("LoadInnerXml before transformation.");
  93 #endif
  94                         XmlResolver resolver = GetResolver ();
  95
  96                         XslTransform xsl = new XslTransform ();
  97                         XmlDocument doc = new XmlDocument ();
  98 #if NET_1_1
  99                         doc.XmlResolver = resolver;
 100 #endif
 101                         foreach (XmlNode n in xnl)
 102                                 doc.AppendChild (doc.ImportNode (n, true));
 103 #if NET_1_1
 104                         xsl.Load (doc, resolver);
 105 #else
 106                         xsl.Load (doc);
 107 #endif
 108
 109                         if (inputDoc == null)
 110 #if NET_2_0
 111                                 throw new ArgumentNullException ("LoadInput before transformation.");
 112 #else
 113                                 throw new NullReferenceException ("LoadInput before transformation.");
 114 #endif
 115
 116                         MemoryStream stream = new MemoryStream ();
 117                         // only possible output: Stream
 118 #if NET_1_1
 119                         xsl.XmlResolver = resolver;
 120 #endif
 121                         xsl.Transform (inputDoc, null, stream);
 122
 123                         stream.Seek (0, SeekOrigin.Begin);
 124                         return stream;
 125                 }
 126
 127                 public override object GetOutput (Type type)
 128                 {
 129                         if (type != typeof (Stream))
 130                                 throw new ArgumentException ("type");
 131                         return GetOutput ();
 132                 }
 133
 134                 public override void LoadInnerXml (XmlNodeList nodeList)
 135                 {
 136                         if (nodeList == null)
 137                                 throw new CryptographicException ("nodeList");
 138                         xnl = nodeList;
 139                 }
 140
 141                 public override void LoadInput (object obj)
 142                 {
 143                         // possible input: Stream, XmlDocument, and XmlNodeList
 144                         Stream s = (obj as Stream);
 145                         if (s != null) {
 146                                 inputDoc = new XmlDocument ();
 147 #if NET_1_1
 148                                 inputDoc.XmlResolver = GetResolver ();
 149 #endif
 150 //                              inputDoc.Load (obj as Stream);
 151                                 inputDoc.Load (new XmlSignatureStreamReader (new StreamReader (s)));
 152                                 return;
 153                         }
 154
 155                         XmlDocument xd = (obj as XmlDocument);
 156                         if (xd != null) {
 157                                 inputDoc = xd;
 158                                 return;
 159                         }
 160
 161                         XmlNodeList nl = (obj as XmlNodeList);
 162                         if (nl != null) {
 163                                 inputDoc = new XmlDocument ();
 164 #if NET_1_1
 165                                 inputDoc.XmlResolver = GetResolver ();
 166 #endif
 167                                 for (int i = 0; i < nl.Count; i++)
 168                                         inputDoc.AppendChild (inputDoc.ImportNode (nl [i], true));
 169                         }
 170                 }
 171         }
 172 }