mcs/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
  32 using System.Xml;
  33
  34 namespace System.Security.Cryptography.Xml {
  35         public abstract class EncryptedReference {
  36
  37                 #region Fields
  38
  39                 string referenceType;
  40                 string uri;
  41                 TransformChain tc;
  42
  43                 #endregion // Fields
  44
  45                 #region Constructors
  46
  47                 protected EncryptedReference ()
  48                 {
  49                         TransformChain = new TransformChain ();
  50                 }
  51
  52                 protected EncryptedReference (string uri)
  53                 {
  54                         Uri = uri;
  55                         TransformChain = new TransformChain ();
  56                 }
  57
  58                 protected EncryptedReference (string uri, TransformChain transformChain)
  59                         : this ()
  60                 {
  61                         Uri = uri;
  62                         TransformChain = transformChain;
  63                 }
  64
  65                 #endregion // Constructors
  66
  67                 #region Properties
  68
  69                 [MonoTODO("Always returns false")]
  70                 protected internal bool CacheValid {
  71                         get { return false; }
  72                 }
  73
  74                 protected string ReferenceType {
  75                         get { return referenceType; }
  76                         set { referenceType = value; }
  77                 }
  78
  79                 public TransformChain TransformChain {
  80                         get { return tc; }
  81                         set { tc = value; }
  82                 }
  83
  84                 public string Uri {
  85                         get { return uri; }
  86                         set { uri = value; }
  87                 }
  88
  89                 #endregion // Properties
  90
  91                 #region Methods
  92
  93                 public void AddTransform (Transform transform)
  94                 {
  95                         TransformChain.Add (transform);
  96                 }
  97
  98                 public virtual XmlElement GetXml ()
  99                 {
 100                         return GetXml (new XmlDocument ());
 101                 }
 102
 103                 internal virtual XmlElement GetXml (XmlDocument document)
 104                 {
 105                         XmlElement xel = document.CreateElement (ReferenceType, EncryptedXml.XmlEncNamespaceUrl);
 106
 107                         xel.SetAttribute (XmlEncryption.AttributeNames.URI, Uri);
 108
 109                         if (TransformChain != null && TransformChain.Count > 0) {
 110                                 XmlElement xtr = document.CreateElement (XmlEncryption.ElementNames.Transforms, EncryptedXml.XmlEncNamespaceUrl);
 111                                 foreach (Transform t in TransformChain)
 112                                         xtr.AppendChild (document.ImportNode (t.GetXml (), true));
 113                                 xel.AppendChild (xtr);
 114                         }
 115
 116                         return xel;
 117                 }
 118
 119                 [MonoTODO ("Make compliant.")]
 120                 public virtual void LoadXml (XmlElement value)
 121                 {
 122                         if (value == null)
 123                                 throw new ArgumentNullException ("value");
 124                         else {
 125                                 Uri = null;
 126                                 TransformChain = new TransformChain ();
 127
 128                                 foreach (XmlNode n in value.ChildNodes) {
 129                                         if (n is XmlWhitespace)
 130                                                 continue;
 131
 132                                         switch (n.LocalName) {
 133                                         case XmlEncryption.ElementNames.Transforms:
 134                                                 foreach (XmlNode xn in ((XmlElement) n).GetElementsByTagName (XmlSignature.ElementNames.Transform, XmlSignature.NamespaceURI)) {
 135                                                         Transform t = null;
 136                                                         switch (((XmlElement) xn).Attributes [XmlSignature.AttributeNames.Algorithm].Value) {
 137                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigBase64Transform:
 138                                                                 t = new XmlDsigBase64Transform ();
 139                                                                 break;
 140                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigC14NTransform:
 141                                                                 t = new XmlDsigC14NTransform ();
 142                                                                 break;
 143                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigC14NWithCommentsTransform:
 144                                                                 t = new XmlDsigC14NWithCommentsTransform ();
 145                                                                 break;
 146                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigEnvelopedSignatureTransform:
 147                                                                 t = new XmlDsigEnvelopedSignatureTransform ();
 148                                                                 break;
 149                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigXPathTransform:
 150                                                                 t = new XmlDsigXPathTransform ();
 151                                                                 break;
 152                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigXsltTransform:
 153                                                                 t = new XmlDsigXsltTransform ();
 154                                                                 break;
 155                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NTransform:
 156                                                                 t = new XmlDsigExcC14NTransform ();
 157                                                                 break;
 158                                                         case XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NWithCommentsTransform:
 159                                                                 t = new XmlDsigExcC14NWithCommentsTransform ();
 160                                                                 break;
 161                                                         case XmlSignature.AlgorithmNamespaces.XmlDecryptionTransform:
 162                                                                 t = new XmlDecryptionTransform ();
 163                                                                 break;
 164                                                         default:
 165                                                                 continue;
 166                                                         }
 167
 168                                                         t.LoadInnerXml (((XmlElement) xn).ChildNodes);
 169                                                         TransformChain.Add (t);
 170                                                 }
 171                                                 break;
 172                                         }
 173                                 }
 174
 175                                 if (value.HasAttribute (XmlEncryption.AttributeNames.URI))
 176                                         Uri = value.Attributes [XmlEncryption.AttributeNames.URI].Value;
 177                         }
 178                 }
 179
 180                 #endregion // Methods
 181         }
 182 }
 183