mcs/class/System.Security/System.Security.Cryptography.Xml/EncryptedData.cs

   1 //
   2 // EncryptedData.cs - EncryptedData implementation for XML Encryption
   3 // http://www.w3.org/2001/04/xmlenc#sec-EncryptedData
   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 EncryptedData : EncryptedType {
  37
  38                 #region Constructors
  39
  40                 public EncryptedData ()
  41                         : base ()
  42                 {
  43                 }
  44
  45                 #endregion // Constructors
  46
  47                 #region Methods
  48
  49                 public override XmlElement GetXml ()
  50                 {
  51                         return GetXml (new XmlDocument ());
  52                 }
  53
  54                 internal XmlElement GetXml (XmlDocument document)
  55                 {
  56                         if (CipherData == null)
  57                                 throw new CryptographicException ("Cipher data is not specified.");
  58
  59                         XmlElement xel = document.CreateElement (XmlEncryption.ElementNames.EncryptedData, EncryptedXml.XmlEncNamespaceUrl);
  60
  61                         if (EncryptionMethod != null)
  62                                 xel.AppendChild (EncryptionMethod.GetXml (document));
  63                         if (KeyInfo != null)
  64                                 xel.AppendChild (document.ImportNode (KeyInfo.GetXml (), true));
  65                         if (CipherData != null)
  66                                 xel.AppendChild (CipherData.GetXml (document));
  67
  68                         if (EncryptionProperties.Count > 0) {
  69                                 XmlElement xep = document.CreateElement (XmlEncryption.ElementNames.EncryptionProperties, EncryptedXml.XmlEncNamespaceUrl);
  70                                 foreach (EncryptionProperty p in EncryptionProperties)
  71                                         xep.AppendChild (p.GetXml (document));
  72                                 xel.AppendChild (xep);
  73                         }
  74
  75                         if (Id != null)
  76                                 xel.SetAttribute (XmlEncryption.AttributeNames.Id, Id);
  77                         if (Type != null)
  78                                 xel.SetAttribute (XmlEncryption.AttributeNames.Type, Type);
  79                         if (MimeType != null)
  80                                 xel.SetAttribute (XmlEncryption.AttributeNames.MimeType, MimeType);
  81                         if (Encoding != null)
  82                                 xel.SetAttribute (XmlEncryption.AttributeNames.Encoding, Encoding);
  83                         return xel;
  84                 }
  85
  86                 public override void LoadXml (XmlElement value)
  87                 {
  88                         if (value == null)
  89                                 throw new ArgumentNullException ("value");
  90
  91                         if ((value.LocalName != XmlEncryption.ElementNames.EncryptedData) || (value.NamespaceURI != EncryptedXml.XmlEncNamespaceUrl))
  92                                 throw new CryptographicException ("Malformed EncryptedData element.");
  93                         else {
  94                                 EncryptionMethod = null;
  95                                 KeyInfo keyInfo = null;
  96                                 CipherData cipherData = null;
  97                                 EncryptionMethod = null;
  98                                 EncryptionProperties = new EncryptionProperties ();
  99                                 Id = null;
 100                                 Type = null;
 101                                 MimeType = null;
 102                                 Encoding = null;
 103
 104                                 foreach (XmlNode n in value.ChildNodes) {
 105                                         if (n is XmlWhitespace)
 106                                                 continue;
 107
 108                                         switch (n.LocalName) {
 109                                         case XmlEncryption.ElementNames.EncryptionMethod:
 110                                                 EncryptionMethod = new EncryptionMethod ();
 111                                                 EncryptionMethod.LoadXml ((XmlElement) n);
 112                                                 break;
 113                                         case XmlSignature.ElementNames.KeyInfo:
 114                                                 KeyInfo = new KeyInfo ();
 115                                                 KeyInfo.LoadXml ((XmlElement) n);
 116                                                 break;
 117                                         case XmlEncryption.ElementNames.CipherData:
 118                                                 CipherData = new CipherData ();
 119                                                 CipherData.LoadXml ((XmlElement) n);
 120                                                 break;
 121                                         case XmlEncryption.ElementNames.EncryptionProperties:
 122                                                 foreach (XmlElement element in ((XmlElement) n).GetElementsByTagName (XmlEncryption.ElementNames.EncryptionProperty, EncryptedXml.XmlEncNamespaceUrl))
 123                                                         EncryptionProperties.Add (new EncryptionProperty (element));
 124                                                 break;
 125                                         }
 126                                 }
 127
 128                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Id))
 129                                         Id = value.Attributes [XmlEncryption.AttributeNames.Id].Value;
 130                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Type))
 131                                         Type = value.Attributes [XmlEncryption.AttributeNames.Type].Value;
 132                                 if (value.HasAttribute (XmlEncryption.AttributeNames.MimeType))
 133                                         MimeType = value.Attributes [XmlEncryption.AttributeNames.MimeType].Value;
 134                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Encoding))
 135                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Encoding].Value;
 136                         }
 137                 }
 138
 139                 #endregion // Methods
 140         }
 141 }
 142
 143 #endif