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 #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                         : base ()
  50                 {
  51                         CarriedKeyName = null;
  52                         Recipient = null;
  53                         ReferenceList = new ReferenceList ();
  54                 }
  55
  56                 #endregion // Constructors
  57
  58                 #region Properties
  59
  60                 public string CarriedKeyName {
  61                         get { return carriedKeyName; }
  62                         set { carriedKeyName = value; }
  63                 }
  64
  65                 public string Recipient {
  66                         get { return recipient; }
  67                         set { recipient = value; }
  68                 }
  69
  70                 public ReferenceList ReferenceList {
  71                         get { return referenceList; }
  72                         set { referenceList = value; }
  73                 }
  74
  75                 #endregion // Properties
  76
  77                 #region Methods
  78
  79                 public void AddReference (DataReference dataReference)
  80                 {
  81                         ReferenceList.Add (dataReference);
  82                 }
  83
  84                 public void AddReference (KeyReference keyReference)
  85                 {
  86                         ReferenceList.Add (keyReference);
  87                 }
  88
  89                 public override XmlElement GetXml ()
  90                 {
  91                         return GetXml (new XmlDocument ());
  92                 }
  93
  94                 internal XmlElement GetXml (XmlDocument document)
  95                 {
  96                         if (CipherData == null)
  97                                 throw new CryptographicException ("Cipher data is not specified.");
  98
  99                         XmlElement xel = document.CreateElement (XmlEncryption.ElementNames.EncryptedData, EncryptedXml.XmlEncNamespaceUrl);
 100
 101                         if (EncryptionMethod != null)
 102                                 xel.AppendChild (EncryptionMethod.GetXml (document));
 103                         if (KeyInfo != null)
 104                                 xel.AppendChild (document.ImportNode (KeyInfo.GetXml (), true));
 105                         if (CipherData != null)
 106                                 xel.AppendChild (CipherData.GetXml (document));
 107
 108                         if (EncryptionProperties.Count > 0) {
 109                                 XmlElement xep = document.CreateElement (XmlEncryption.ElementNames.EncryptionProperties, EncryptedXml.XmlEncNamespaceUrl);
 110                                 foreach (EncryptionProperty p in EncryptionProperties)
 111                                         xep.AppendChild (p.GetXml (document));
 112                                 xel.AppendChild (xep);
 113                         }
 114
 115                         if (ReferenceList.Count > 0) {
 116                                 XmlElement xrl = document.CreateElement (XmlEncryption.ElementNames.ReferenceList, EncryptedXml.XmlEncNamespaceUrl);
 117                                 foreach (EncryptedReference er in ReferenceList)
 118                                         xrl.AppendChild (er.GetXml (document));
 119                                 xel.AppendChild (xrl);
 120                         }
 121
 122                         if (CarriedKeyName != null) {
 123                                 XmlElement xck = document.CreateElement (XmlEncryption.ElementNames.CarriedKeyName, EncryptedXml.XmlEncNamespaceUrl);
 124                                 xck.InnerText = CarriedKeyName;
 125                                 xel.AppendChild (xck);
 126                         }
 127
 128                         if (Id != null)
 129                                 xel.SetAttribute (XmlEncryption.AttributeNames.Id, Id);
 130                         if (Type != null)
 131                                 xel.SetAttribute (XmlEncryption.AttributeNames.Type, Type);
 132                         if (MimeType != null)
 133                                 xel.SetAttribute (XmlEncryption.AttributeNames.MimeType, MimeType);
 134                         if (Encoding != null)
 135                                 xel.SetAttribute (XmlEncryption.AttributeNames.Encoding, Encoding);
 136                         if (Recipient != null)
 137                                 xel.SetAttribute (XmlEncryption.AttributeNames.Recipient, Recipient);
 138                         return xel;
 139                 }
 140
 141                 public override void LoadXml (XmlElement value)
 142                 {
 143                         if (value == null)
 144                                 throw new ArgumentNullException ("value");
 145
 146                         if ((value.LocalName != XmlEncryption.ElementNames.EncryptedKey) || (value.NamespaceURI != EncryptedXml.XmlEncNamespaceUrl))
 147                                 throw new CryptographicException ("Malformed EncryptedKey element.");
 148                         else {
 149                                 EncryptionMethod = null;
 150                                 KeyInfo keyInfo = null;
 151                                 CipherData cipherData = null;
 152                                 EncryptionMethod = null;
 153                                 EncryptionProperties = new EncryptionProperties ();
 154                                 ReferenceList = new ReferenceList ();
 155                                 CarriedKeyName = null;
 156                                 Id = null;
 157                                 Type = null;
 158                                 MimeType = null;
 159                                 Encoding = null;
 160                                 Recipient = null;
 161
 162                                 foreach (XmlNode n in value.ChildNodes) {
 163                                         if (n is XmlWhitespace)
 164                                                 continue;
 165
 166                                         switch (n.LocalName) {
 167                                         case XmlEncryption.ElementNames.EncryptionMethod:
 168                                                 EncryptionMethod = new EncryptionMethod ();
 169                                                 EncryptionMethod.LoadXml ((XmlElement) n);
 170                                                 break;
 171                                         case XmlSignature.ElementNames.KeyInfo:
 172                                                 KeyInfo = new KeyInfo ();
 173                                                 KeyInfo.LoadXml ((XmlElement) n);
 174                                                 break;
 175                                         case XmlEncryption.ElementNames.CipherData:
 176                                                 CipherData = new CipherData ();
 177                                                 CipherData.LoadXml ((XmlElement) n);
 178                                                 break;
 179                                         case XmlEncryption.ElementNames.EncryptionProperties:
 180                                                 foreach (XmlElement element in ((XmlElement) n).GetElementsByTagName (XmlEncryption.ElementNames.EncryptionProperty, EncryptedXml.XmlEncNamespaceUrl))
 181                                                         EncryptionProperties.Add (new EncryptionProperty (element));
 182                                                 break;
 183                                         case XmlEncryption.ElementNames.ReferenceList:
 184                                                 foreach (XmlNode r in ((XmlElement) n).ChildNodes) {
 185                                                         if (r is XmlWhitespace)
 186                                                                 continue;
 187
 188                                                         switch (r.LocalName) {
 189                                                         case XmlEncryption.ElementNames.DataReference:
 190                                                                 DataReference dr = new DataReference ();
 191                                                                 dr.LoadXml ((XmlElement) r);
 192                                                                 AddReference (dr);
 193                                                                 break;
 194                                                         case XmlEncryption.ElementNames.KeyReference:
 195                                                                 KeyReference kr = new KeyReference ();
 196                                                                 kr.LoadXml ((XmlElement) r);
 197                                                                 AddReference (kr);
 198                                                                 break;
 199                                                         }
 200                                                 }
 201                                                 break;
 202                                         case XmlEncryption.ElementNames.CarriedKeyName:
 203                                                 CarriedKeyName = ((XmlElement) n).InnerText;
 204                                                 break;
 205                                         }
 206                                 }
 207
 208                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Id))
 209                                         Id = value.Attributes [XmlEncryption.AttributeNames.Id].Value;
 210                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Type))
 211                                         Type = value.Attributes [XmlEncryption.AttributeNames.Type].Value;
 212                                 if (value.HasAttribute (XmlEncryption.AttributeNames.MimeType))
 213                                         MimeType = value.Attributes [XmlEncryption.AttributeNames.MimeType].Value;
 214                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Encoding))
 215                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Encoding].Value;
 216                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Recipient))
 217                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Recipient].Value;
 218                         }
 219                 }
 220
 221                 #endregion // Methods
 222         }
 223 }
 224
 225 #endif