mcs/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
  32 using System.Xml;
  33
  34 namespace System.Security.Cryptography.Xml {
  35         public sealed class EncryptedKey : EncryptedType {
  36
  37                 #region Fields
  38
  39                 string carriedKeyName;
  40                 string recipient;
  41                 ReferenceList referenceList;
  42
  43                 #endregion // Fields
  44
  45                 #region Constructors
  46
  47                 public EncryptedKey ()
  48                 {
  49                         referenceList = new ReferenceList ();
  50                 }
  51
  52                 #endregion // Constructors
  53
  54                 #region Properties
  55
  56                 public string CarriedKeyName {
  57                         get { return carriedKeyName; }
  58                         set { carriedKeyName = value; }
  59                 }
  60
  61                 public string Recipient {
  62                         get { return recipient; }
  63                         set { recipient = value; }
  64                 }
  65
  66                 public ReferenceList ReferenceList {
  67                         get { return referenceList; }
  68                 }
  69
  70                 #endregion // Properties
  71
  72                 #region Methods
  73
  74                 public void AddReference (DataReference dataReference)
  75                 {
  76                         ReferenceList.Add (dataReference);
  77                 }
  78
  79                 public void AddReference (KeyReference keyReference)
  80                 {
  81                         ReferenceList.Add (keyReference);
  82                 }
  83
  84                 public override XmlElement GetXml ()
  85                 {
  86                         return GetXml (new XmlDocument ());
  87                 }
  88
  89                 internal XmlElement GetXml (XmlDocument document)
  90                 {
  91                         if (CipherData == null)
  92                                 throw new CryptographicException ("Cipher data is not specified.");
  93
  94                         XmlElement xel = document.CreateElement (XmlEncryption.ElementNames.EncryptedKey, EncryptedXml.XmlEncNamespaceUrl);
  95
  96                         if (EncryptionMethod != null)
  97                                 xel.AppendChild (EncryptionMethod.GetXml (document));
  98                         if (KeyInfo != null)
  99                                 xel.AppendChild (document.ImportNode (KeyInfo.GetXml (), true));
 100                         if (CipherData != null)
 101                                 xel.AppendChild (CipherData.GetXml (document));
 102
 103                         if (EncryptionProperties.Count > 0) {
 104                                 XmlElement xep = document.CreateElement (XmlEncryption.ElementNames.EncryptionProperties, EncryptedXml.XmlEncNamespaceUrl);
 105                                 foreach (EncryptionProperty p in EncryptionProperties)
 106                                         xep.AppendChild (p.GetXml (document));
 107                                 xel.AppendChild (xep);
 108                         }
 109
 110                         if (ReferenceList.Count > 0) {
 111                                 XmlElement xrl = document.CreateElement (XmlEncryption.ElementNames.ReferenceList, EncryptedXml.XmlEncNamespaceUrl);
 112                                 foreach (EncryptedReference er in ReferenceList)
 113                                         xrl.AppendChild (er.GetXml (document));
 114                                 xel.AppendChild (xrl);
 115                         }
 116
 117                         if (CarriedKeyName != null) {
 118                                 XmlElement xck = document.CreateElement (XmlEncryption.ElementNames.CarriedKeyName, EncryptedXml.XmlEncNamespaceUrl);
 119                                 xck.InnerText = CarriedKeyName;
 120                                 xel.AppendChild (xck);
 121                         }
 122
 123                         if (Id != null)
 124                                 xel.SetAttribute (XmlEncryption.AttributeNames.Id, Id);
 125                         if (Type != null)
 126                                 xel.SetAttribute (XmlEncryption.AttributeNames.Type, Type);
 127                         if (MimeType != null)
 128                                 xel.SetAttribute (XmlEncryption.AttributeNames.MimeType, MimeType);
 129                         if (Encoding != null)
 130                                 xel.SetAttribute (XmlEncryption.AttributeNames.Encoding, Encoding);
 131                         if (Recipient != null)
 132                                 xel.SetAttribute (XmlEncryption.AttributeNames.Recipient, Recipient);
 133                         return xel;
 134                 }
 135
 136                 public override void LoadXml (XmlElement value)
 137                 {
 138                         if (value == null)
 139                                 throw new ArgumentNullException ("value");
 140
 141                         if ((value.LocalName != XmlEncryption.ElementNames.EncryptedKey) || (value.NamespaceURI != EncryptedXml.XmlEncNamespaceUrl))
 142                                 throw new CryptographicException ("Malformed EncryptedKey element.");
 143                         else {
 144                                 EncryptionMethod = null;
 145                                 EncryptionMethod = null;
 146                                 EncryptionProperties.Clear ();
 147                                 ReferenceList.Clear ();
 148                                 CarriedKeyName = null;
 149                                 Id = null;
 150                                 Type = null;
 151                                 MimeType = null;
 152                                 Encoding = null;
 153                                 Recipient = null;
 154
 155                                 foreach (XmlNode n in value.ChildNodes) {
 156                                         if (n is XmlWhitespace)
 157                                                 continue;
 158
 159                                         switch (n.LocalName) {
 160                                         case XmlEncryption.ElementNames.EncryptionMethod:
 161                                                 EncryptionMethod = new EncryptionMethod ();
 162                                                 EncryptionMethod.LoadXml ((XmlElement) n);
 163                                                 break;
 164                                         case XmlSignature.ElementNames.KeyInfo:
 165                                                 KeyInfo = new KeyInfo ();
 166                                                 KeyInfo.LoadXml ((XmlElement) n);
 167                                                 break;
 168                                         case XmlEncryption.ElementNames.CipherData:
 169                                                 CipherData = new CipherData ();
 170                                                 CipherData.LoadXml ((XmlElement) n);
 171                                                 break;
 172                                         case XmlEncryption.ElementNames.EncryptionProperties:
 173                                                 foreach (XmlElement element in ((XmlElement) n).GetElementsByTagName (XmlEncryption.ElementNames.EncryptionProperty, EncryptedXml.XmlEncNamespaceUrl))
 174                                                         EncryptionProperties.Add (new EncryptionProperty (element));
 175                                                 break;
 176                                         case XmlEncryption.ElementNames.ReferenceList:
 177                                                 foreach (XmlNode r in ((XmlElement) n).ChildNodes) {
 178                                                         if (r is XmlWhitespace)
 179                                                                 continue;
 180
 181                                                         switch (r.LocalName) {
 182                                                         case XmlEncryption.ElementNames.DataReference:
 183                                                                 DataReference dr = new DataReference ();
 184                                                                 dr.LoadXml ((XmlElement) r);
 185                                                                 AddReference (dr);
 186                                                                 break;
 187                                                         case XmlEncryption.ElementNames.KeyReference:
 188                                                                 KeyReference kr = new KeyReference ();
 189                                                                 kr.LoadXml ((XmlElement) r);
 190                                                                 AddReference (kr);
 191                                                                 break;
 192                                                         }
 193                                                 }
 194                                                 break;
 195                                         case XmlEncryption.ElementNames.CarriedKeyName:
 196                                                 CarriedKeyName = ((XmlElement) n).InnerText;
 197                                                 break;
 198                                         }
 199                                 }
 200
 201                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Id))
 202                                         Id = value.Attributes [XmlEncryption.AttributeNames.Id].Value;
 203                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Type))
 204                                         Type = value.Attributes [XmlEncryption.AttributeNames.Type].Value;
 205                                 if (value.HasAttribute (XmlEncryption.AttributeNames.MimeType))
 206                                         MimeType = value.Attributes [XmlEncryption.AttributeNames.MimeType].Value;
 207                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Encoding))
 208                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Encoding].Value;
 209                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Recipient))
 210                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Recipient].Value;
 211                         }
 212                 }
 213
 214                 #endregion // Methods
 215         }
 216 }
 217