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

   1 //
   2 // EncryptedKey.cs - EncryptedKey implementation for XML Encryption
   3 // http://www.w3.org/2001/04/xmlenc#sec-EncryptedKey
   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 sealed class EncryptedKey : EncryptedType {
  37
  38                 #region Fields
  39
  40                 string carriedKeyName;
  41                 string recipient;
  42                 ReferenceList referenceList;
  43
  44                 #endregion // Fields
  45
  46                 #region Constructors
  47
  48                 public EncryptedKey ()
  49                 {
  50                         referenceList = new ReferenceList ();
  51                 }
  52
  53                 #endregion // Constructors
  54
  55                 #region Properties
  56
  57                 public string CarriedKeyName {
  58                         get { return carriedKeyName; }
  59                         set { carriedKeyName = value; }
  60                 }
  61
  62                 public string Recipient {
  63                         get { return recipient; }
  64                         set { recipient = value; }
  65                 }
  66
  67                 public ReferenceList ReferenceList {
  68                         get { return referenceList; }
  69                 }
  70
  71                 #endregion // Properties
  72
  73                 #region Methods
  74
  75                 public void AddReference (DataReference dataReference)
  76                 {
  77                         ReferenceList.Add (dataReference);
  78                 }
  79
  80                 public void AddReference (KeyReference keyReference)
  81                 {
  82                         ReferenceList.Add (keyReference);
  83                 }
  84
  85                 public override XmlElement GetXml ()
  86                 {
  87                         return GetXml (new XmlDocument ());
  88                 }
  89
  90                 internal XmlElement GetXml (XmlDocument document)
  91                 {
  92                         if (CipherData == null)
  93                                 throw new CryptographicException ("Cipher data is not specified.");
  94
  95                         XmlElement xel = document.CreateElement (XmlEncryption.ElementNames.EncryptedKey, EncryptedXml.XmlEncNamespaceUrl);
  96
  97                         if (EncryptionMethod != null)
  98                                 xel.AppendChild (EncryptionMethod.GetXml (document));
  99                         if (KeyInfo != null)
 100                                 xel.AppendChild (document.ImportNode (KeyInfo.GetXml (), true));
 101                         if (CipherData != null)
 102                                 xel.AppendChild (CipherData.GetXml (document));
 103
 104                         if (EncryptionProperties.Count > 0) {
 105                                 XmlElement xep = document.CreateElement (XmlEncryption.ElementNames.EncryptionProperties, EncryptedXml.XmlEncNamespaceUrl);
 106                                 foreach (EncryptionProperty p in EncryptionProperties)
 107                                         xep.AppendChild (p.GetXml (document));
 108                                 xel.AppendChild (xep);
 109                         }
 110
 111                         if (ReferenceList.Count > 0) {
 112                                 XmlElement xrl = document.CreateElement (XmlEncryption.ElementNames.ReferenceList, EncryptedXml.XmlEncNamespaceUrl);
 113                                 foreach (EncryptedReference er in ReferenceList)
 114                                         xrl.AppendChild (er.GetXml (document));
 115                                 xel.AppendChild (xrl);
 116                         }
 117
 118                         if (CarriedKeyName != null) {
 119                                 XmlElement xck = document.CreateElement (XmlEncryption.ElementNames.CarriedKeyName, EncryptedXml.XmlEncNamespaceUrl);
 120                                 xck.InnerText = CarriedKeyName;
 121                                 xel.AppendChild (xck);
 122                         }
 123
 124                         if (Id != null)
 125                                 xel.SetAttribute (XmlEncryption.AttributeNames.Id, Id);
 126                         if (Type != null)
 127                                 xel.SetAttribute (XmlEncryption.AttributeNames.Type, Type);
 128                         if (MimeType != null)
 129                                 xel.SetAttribute (XmlEncryption.AttributeNames.MimeType, MimeType);
 130                         if (Encoding != null)
 131                                 xel.SetAttribute (XmlEncryption.AttributeNames.Encoding, Encoding);
 132                         if (Recipient != null)
 133                                 xel.SetAttribute (XmlEncryption.AttributeNames.Recipient, Recipient);
 134                         return xel;
 135                 }
 136
 137                 public override void LoadXml (XmlElement value)
 138                 {
 139                         if (value == null)
 140                                 throw new ArgumentNullException ("value");
 141
 142                         if ((value.LocalName != XmlEncryption.ElementNames.EncryptedKey) || (value.NamespaceURI != EncryptedXml.XmlEncNamespaceUrl))
 143                                 throw new CryptographicException ("Malformed EncryptedKey element.");
 144                         else {
 145                                 EncryptionMethod = null;
 146                                 EncryptionMethod = null;
 147                                 EncryptionProperties.Clear ();
 148                                 ReferenceList.Clear ();
 149                                 CarriedKeyName = null;
 150                                 Id = null;
 151                                 Type = null;
 152                                 MimeType = null;
 153                                 Encoding = null;
 154                                 Recipient = null;
 155
 156                                 foreach (XmlNode n in value.ChildNodes) {
 157                                         if (n is XmlWhitespace)
 158                                                 continue;
 159
 160                                         switch (n.LocalName) {
 161                                         case XmlEncryption.ElementNames.EncryptionMethod:
 162                                                 EncryptionMethod = new EncryptionMethod ();
 163                                                 EncryptionMethod.LoadXml ((XmlElement) n);
 164                                                 break;
 165                                         case XmlSignature.ElementNames.KeyInfo:
 166                                                 KeyInfo = new KeyInfo ();
 167                                                 KeyInfo.LoadXml ((XmlElement) n);
 168                                                 break;
 169                                         case XmlEncryption.ElementNames.CipherData:
 170                                                 CipherData = new CipherData ();
 171                                                 CipherData.LoadXml ((XmlElement) n);
 172                                                 break;
 173                                         case XmlEncryption.ElementNames.EncryptionProperties:
 174                                                 foreach (XmlElement element in ((XmlElement) n).GetElementsByTagName (XmlEncryption.ElementNames.EncryptionProperty, EncryptedXml.XmlEncNamespaceUrl))
 175                                                         EncryptionProperties.Add (new EncryptionProperty (element));
 176                                                 break;
 177                                         case XmlEncryption.ElementNames.ReferenceList:
 178                                                 foreach (XmlNode r in ((XmlElement) n).ChildNodes) {
 179                                                         if (r is XmlWhitespace)
 180                                                                 continue;
 181
 182                                                         switch (r.LocalName) {
 183                                                         case XmlEncryption.ElementNames.DataReference:
 184                                                                 DataReference dr = new DataReference ();
 185                                                                 dr.LoadXml ((XmlElement) r);
 186                                                                 AddReference (dr);
 187                                                                 break;
 188                                                         case XmlEncryption.ElementNames.KeyReference:
 189                                                                 KeyReference kr = new KeyReference ();
 190                                                                 kr.LoadXml ((XmlElement) r);
 191                                                                 AddReference (kr);
 192                                                                 break;
 193                                                         }
 194                                                 }
 195                                                 break;
 196                                         case XmlEncryption.ElementNames.CarriedKeyName:
 197                                                 CarriedKeyName = ((XmlElement) n).InnerText;
 198                                                 break;
 199                                         }
 200                                 }
 201
 202                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Id))
 203                                         Id = value.Attributes [XmlEncryption.AttributeNames.Id].Value;
 204                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Type))
 205                                         Type = value.Attributes [XmlEncryption.AttributeNames.Type].Value;
 206                                 if (value.HasAttribute (XmlEncryption.AttributeNames.MimeType))
 207                                         MimeType = value.Attributes [XmlEncryption.AttributeNames.MimeType].Value;
 208                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Encoding))
 209                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Encoding].Value;
 210                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Recipient))
 211                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Recipient].Value;
 212                         }
 213                 }
 214
 215                 #endregion // Methods
 216         }
 217 }
 218
 219 #endif