class/System.Security/System.Security.Cryptography.Xml/EncryptedReference.cs

   1 //
   2 // EncryptedReference.cs - EncryptedReference implementation for XML Encryption
   3 // http://www.w3.org/2001/04/xmlenc#sec-EncryptedReference
   4 //
   5 // Author:
   6 //      Tim Coleman (tim@timcoleman.com)
   7 //
   8 // Copyright (C) Tim Coleman, 2004
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 #if NET_2_0
  32
  33 using System.Xml;
  34
  35 namespace System.Security.Cryptography.Xml {
  36         public abstract class EncryptedReference {
  37
  38                 #region Fields
  39
  40                 bool cacheValid;
  41                 string referenceType;
  42                 string uri;
  43                 TransformChain tc;
  44
  45                 #endregion // Fields
  46
  47                 #region Constructors
  48
  49                 protected EncryptedReference ()
  50                 {
  51                         TransformChain = new TransformChain ();
  52                 }
  53
  54                 protected EncryptedReference (string uri)
  55                 {
  56                         Uri = uri;
  57                         TransformChain = new TransformChain ();
  58                 }
  59
  60                 protected EncryptedReference (string uri, TransformChain tc)
  61                         : this ()
  62                 {
  63                         Uri = uri;
  64                         TransformChain = tc;
  65                 }
  66
  67                 #endregion // Constructors
  68
  69                 #region Properties
  70
  71                 [MonoTODO()]
  72                 protected internal bool CacheValid {
  73                         get { return cacheValid; }
  74                 }
  75
  76                 protected string ReferenceType {
  77                         get { return referenceType; }
  78                         set { referenceType = value; }
  79                 }
  80
  81                 public TransformChain TransformChain {
  82                         get { return tc; }
  83                         set { tc = value; }
  84                 }
  85
  86                 public string Uri {
  87                         get { return uri; }
  88                         set { uri = value; }
  89                 }
  90
  91                 #endregion // Properties
  92
  93                 #region Methods
  94
  95                 public void AddTransform (Transform transform)
  96                 {
  97                         TransformChain.Add (transform);
  98                 }
  99
 100                 public virtual XmlElement GetXml ()
 101                 {
 102                         return GetXml (new XmlDocument ());
 103                 }
 104
 105                 internal virtual XmlElement GetXml (XmlDocument document)
 106                 {
 107                         XmlElement xel = document.CreateElement (ReferenceType, EncryptedXml.XmlEncNamespaceUrl);
 108
 109                         xel.SetAttribute (XmlEncryption.AttributeNames.URI, Uri);
 110
 111                         if (TransformChain != null && TransformChain.Count > 0) {
 112                                 XmlElement xtr = document.CreateElement (XmlEncryption.ElementNames.Transforms, EncryptedXml.XmlEncNamespaceUrl);
 113                                 foreach (Transform t in TransformChain)
 114                                         xtr.AppendChild (document.ImportNode (t.GetXml (), true));
 115                                 xel.AppendChild (xtr);
 116                         }
 117
 118                         return xel;
 119                 }
 120
 121                 [MonoTODO ("Make compliant.")]
 122                 public virtual void LoadXml (XmlElement value)
 123                 {
 124                         if (value == null)
 125                                 throw new ArgumentNullException ("value");
 126                         else {
 127                                 Uri = null;
 128                                 TransformChain = new TransformChain ();
 129
 130                                 foreach (XmlNode n in value.ChildNodes) {
 131                                         if (n is XmlWhitespace)
 132                                                 continue;
 133
 134                                         switch (n.LocalName) {
 135                                         case XmlEncryption.ElementNames.Transforms:
 136                                                 foreach (XmlNode xn in ((XmlElement) n).GetElementsByTagName (XmlSignature.ElementNames.Transform, XmlSignature.NamespaceURI)) {
 137                                                         Transform t = null;
 138                                                         switch (((XmlElement) xn).Attributes [XmlSignature.AttributeNames.Algorithm].Value) {
 139                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigBase64Transform:
 140                                                                 t = new XmlDsigBase64Transform ();
 141                                                                 break;
 142                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigC14NTransform:
 143                                                                 t = new XmlDsigC14NTransform ();
 144                                                                 break;
 145                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigC14NWithCommentsTransform:
 146                                                                 t = new XmlDsigC14NWithCommentsTransform ();
 147                                                                 break;
 148                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigEnvelopedSignatureTransform:
 149                                                                 t = new XmlDsigEnvelopedSignatureTransform ();
 150                                                                 break;
 151                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigXPathTransform:
 152                                                                 t = new XmlDsigXPathTransform ();
 153                                                                 break;
 154                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigXsltTransform:
 155                                                                 t = new XmlDsigXsltTransform ();
 156                                                                 break;
 157 #if NET_2_0
 158                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NTransform:
 159                                                                 t = new XmlDsigExcC14NTransform ();
 160                                                                 break;
 161                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NWithCommentsTransform:
 162                                                                 t = new XmlDsigExcC14NWithCommentsTransform ();
 163                                                                 break;
 164                                                         case XmlSignature.AlgorithmNamespaces.XmlDecryptionTransform:
 165                                                                 t = new XmlDecryptionTransform ();
 166                                                                 break;
 167 #endif
 168                                                         default:
 169                                                                 continue;
 170                                                         }
 171
 172                                                         t.LoadInnerXml (((XmlElement) xn).ChildNodes);
 173                                                         TransformChain.Add (t);
 174                                                 }
 175                                                 break;
 176                                         }
 177                                 }
 178
 179                                 if (value.HasAttribute (XmlEncryption.AttributeNames.URI))
 180                                         Uri = value.Attributes [XmlEncryption.AttributeNames.URI].Value;
 181                         }
 182                 }
 183
 184                 #endregion // Methods
 185         }
 186 }
 187
 188 #endif