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