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 #if NET_1_2
  11
  12 using System.Xml;
  13
  14 namespace System.Security.Cryptography.Xml {
  15         public sealed class EncryptedData : EncryptedType {
  16
  17                 #region Constructors
  18
  19                 public EncryptedData ()
  20                         : base ()
  21                 {
  22                 }
  23
  24                 #endregion // Constructors
  25
  26                 #region Methods
  27
  28                 public override XmlElement GetXml ()
  29                 {
  30                         return GetXml (new XmlDocument ());
  31                 }
  32
  33                 internal XmlElement GetXml (XmlDocument document)
  34                 {
  35                         if (CipherData == null)
  36                                 throw new CryptographicException ("Cipher data is not specified.");
  37
  38                         XmlElement xel = document.CreateElement (XmlEncryption.ElementNames.EncryptedData, XmlEncryption.NamespaceURI);
  39
  40                         if (EncryptionMethod != null)
  41                                 xel.AppendChild (EncryptionMethod.GetXml (document));
  42                         if (KeyInfo != null)
  43                                 xel.AppendChild (document.ImportNode (KeyInfo.GetXml (), true));
  44                         if (CipherData != null)
  45                                 xel.AppendChild (CipherData.GetXml (document));
  46
  47                         if (EncryptionProperties.Count > 0) {
  48                                 XmlElement xep = document.CreateElement (XmlEncryption.ElementNames.EncryptionProperties, XmlEncryption.NamespaceURI);
  49                                 foreach (EncryptionProperty p in EncryptionProperties)
  50                                         xep.AppendChild (p.GetXml (document));
  51                                 xel.AppendChild (xep);
  52                         }
  53
  54                         if (Id != null)
  55                                 xel.SetAttribute (XmlEncryption.AttributeNames.Id, Id);
  56                         if (Type != null)
  57                                 xel.SetAttribute (XmlEncryption.AttributeNames.Type, Type);
  58                         if (MimeType != null)
  59                                 xel.SetAttribute (XmlEncryption.AttributeNames.MimeType, MimeType);
  60                         if (Encoding != null)
  61                                 xel.SetAttribute (XmlEncryption.AttributeNames.Encoding, Encoding);
  62                         return xel;
  63                 }
  64
  65                 public override void LoadXml (XmlElement value)
  66                 {
  67                         if (value == null)
  68                                 throw new ArgumentNullException ("value");
  69
  70                         if ((value.LocalName != XmlEncryption.ElementNames.EncryptedData) || (value.NamespaceURI != XmlEncryption.NamespaceURI))
  71                                 throw new CryptographicException ("Malformed EncryptedData element.");
  72                         else {
  73                                 EncryptionMethod = null;
  74                                 KeyInfo keyInfo = null;
  75                                 CipherData cipherData = null;
  76                                 EncryptionMethod = null;
  77                                 EncryptionProperties = new EncryptionProperties ();
  78                                 Id = null;
  79                                 Type = null;
  80                                 MimeType = null;
  81                                 Encoding = null;
  82
  83                                 foreach (XmlNode n in value.ChildNodes) {
  84                                         if (n is XmlWhitespace)
  85                                                 continue;
  86
  87                                         switch (n.LocalName) {
  88                                         case XmlEncryption.ElementNames.EncryptionMethod:
  89                                                 EncryptionMethod = new EncryptionMethod ();
  90                                                 EncryptionMethod.LoadXml ((XmlElement) n);
  91                                                 break;
  92                                         case XmlSignature.ElementNames.KeyInfo:
  93                                                 KeyInfo = new KeyInfo ();
  94                                                 KeyInfo.LoadXml ((XmlElement) n);
  95                                                 break;
  96                                         case XmlEncryption.ElementNames.CipherData:
  97                                                 CipherData = new CipherData ();
  98                                                 CipherData.LoadXml ((XmlElement) n);
  99                                                 break;
 100                                         case XmlEncryption.ElementNames.EncryptionProperties:
 101                                                 foreach (XmlElement element in ((XmlElement) n).GetElementsByTagName (XmlEncryption.ElementNames.EncryptionProperty, XmlEncryption.NamespaceURI))
 102                                                         EncryptionProperties.Add (new EncryptionProperty (element));
 103                                                 break;
 104                                         }
 105                                 }
 106
 107                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Id))
 108                                         Id = value.Attributes [XmlEncryption.AttributeNames.Id].Value;
 109                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Type))
 110                                         Type = value.Attributes [XmlEncryption.AttributeNames.Type].Value;
 111                                 if (value.HasAttribute (XmlEncryption.AttributeNames.MimeType))
 112                                         MimeType = value.Attributes [XmlEncryption.AttributeNames.MimeType].Value;
 113                                 if (value.HasAttribute (XmlEncryption.AttributeNames.Encoding))
 114                                         Encoding = value.Attributes [XmlEncryption.AttributeNames.Encoding].Value;
 115                         }
 116                 }
 117
 118                 #endregion // Methods
 119         }
 120 }
 121
 122 #endif