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.Security.Cryptography.X509Certificates;
  34 using System.Xml;
  35
  36 namespace System.Security.Cryptography.Xml {
  37
  38         public sealed class EncryptedData : EncryptedType {
  39
  40                 #region Constructors
  41
  42                 public EncryptedData ()
  43                 {
  44                 }
  45
  46                 #endregion // Constructors
  47
  48                 #region Methods
  49
  50                 public override XmlElement GetXml ()
  51                 {
  52                         return GetXml (new XmlDocument ());
  53                 }
  54
  55                 internal XmlElement GetXml (XmlDocument document)
  56                 {
  57                         if (CipherData == null)
  58                                 throw new CryptographicException ("Cipher data is not specified.");
  59
  60                         XmlElement xel = document.CreateElement (XmlEncryption.ElementNames.EncryptedData, EncryptedXml.XmlEncNamespaceUrl);
  61
  62                         if (EncryptionMethod != null)
  63                                 xel.AppendChild (EncryptionMethod.GetXml (document));
  64                         if (KeyInfo != null)
  65                                 xel.AppendChild (document.ImportNode (KeyInfo.GetXml (), true));
  66                         if (CipherData != null)
  67                                 xel.AppendChild (CipherData.GetXml (document));
  68
  69                         if (EncryptionProperties.Count > 0) {
  70                                 XmlElement xep = document.CreateElement (XmlEncryption.ElementNames.EncryptionProperties, EncryptedXml.XmlEncNamespaceUrl);
  71                                 foreach (EncryptionProperty p in EncryptionProperties)
  72                                         xep.AppendChild (p.GetXml (document));
  73                                 xel.AppendChild (xep);
  74                         }
  75
  76                         if (Id != null)
  77                                 xel.SetAttribute (XmlEncryption.AttributeNames.Id, Id);
  78                         if (Type != null)
  79                                 xel.SetAttribute (XmlEncryption.AttributeNames.Type, Type);
  80                         if (MimeType != null)
  81                                 xel.SetAttribute (XmlEncryption.AttributeNames.MimeType, MimeType);
  82                         if (Encoding != null)
  83                                 xel.SetAttribute (XmlEncryption.AttributeNames.Encoding, Encoding);
  84                         return xel;
  85                 }
  86
  87                 public override void LoadXml (XmlElement value)
  88                 {
  89                         if (value == null)
  90                                 throw new ArgumentNullException ("value");
  91
  92                         if ((value.LocalName != XmlEncryption.ElementNames.EncryptedData) || (value.NamespaceURI != EncryptedXml.XmlEncNamespaceUrl))
  93                                 throw new CryptographicException ("Malformed EncryptedData element.");
  94                         else {
  95                                 EncryptionMethod = null;
  96                                 EncryptionMethod = null;
  97                                 EncryptionProperties.Clear ();
  98                                 Id = null;
  99                                 Type = null;
 100                                 MimeType = null;
 101                                 Encoding = null;
 102
 103                                 foreach (XmlNode n in value.ChildNodes) {
 104                                         if (n is XmlWhitespace)
 105                                                 continue;
 106
 107                                         switch (n.LocalName) {
 108                                         case XmlEncryption.ElementNames.EncryptionMethod:
 109                                                 EncryptionMethod = new EncryptionMethod ();
 110                                                 EncryptionMethod.LoadXml ((XmlElement) n);
 111                                                 break;
 112                                         case XmlSignature.ElementNames.KeyInfo:
 113                                                 KeyInfo = new KeyInfo ();
 114                                                 KeyInfo.LoadXml ((XmlElement) n);
 115                                                 break;
 116                                         case XmlEncryption.ElementNames.CipherData:
 117                                                 CipherData = new CipherData ();
 118                                                 CipherData.LoadXml ((XmlElement) n);
 119                                                 break;
 120                                         case XmlEncryption.ElementNames.EncryptionProperties:
 121                                                 foreach (XmlElement element in ((XmlElement) n).GetElementsByTagName (XmlEncryption.ElementNames.EncryptionProperty, EncryptedXml.XmlEncNamespaceUrl))
 122                                                         EncryptionProperties.Add (new EncryptionProperty (element));
 123                                                 break;
 124                                         }
 125                                 }
 126
 127                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Id))
 128                                         Id = value.Attributes [XmlEncryption.AttributeNames.Id].Value;
 129                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Type))
 130                                         Type = value.Attributes [XmlEncryption.AttributeNames.Type].Value;
 131                                 if (value.HasAttribute (XmlEncryption.AttributeNames.MimeType))
 132                                         MimeType = value.Attributes [XmlEncryption.AttributeNames.MimeType].Value;
 133                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Encoding))
 134                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Encoding].Value;
 135                         }
 136                 }
 137
 138                 #endregion // Methods
 139         }
 140 }
 141
 142 #endif