141 lines
4.8 KiB
C#
141 lines
4.8 KiB
C#
//
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// EncryptedData.cs - EncryptedData implementation for XML Encryption
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// http://www.w3.org/2001/04/xmlenc#sec-EncryptedData
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//
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// Author:
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// Tim Coleman (tim@timcoleman.com)
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//
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// Copyright (C) Tim Coleman, 2004
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Security.Cryptography.X509Certificates;
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using System.Xml;
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namespace System.Security.Cryptography.Xml {
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public sealed class EncryptedData : EncryptedType {
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#region Constructors
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public EncryptedData ()
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{
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}
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#endregion // Constructors
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#region Methods
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public override XmlElement GetXml ()
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{
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return GetXml (new XmlDocument ());
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}
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internal XmlElement GetXml (XmlDocument document)
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{
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if (CipherData == null)
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throw new CryptographicException ("Cipher data is not specified.");
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XmlElement xel = document.CreateElement (XmlEncryption.ElementNames.EncryptedData, EncryptedXml.XmlEncNamespaceUrl);
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if (EncryptionMethod != null)
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xel.AppendChild (EncryptionMethod.GetXml (document));
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if (KeyInfo != null)
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xel.AppendChild (document.ImportNode (KeyInfo.GetXml (), true));
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if (CipherData != null)
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xel.AppendChild (CipherData.GetXml (document));
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if (EncryptionProperties.Count > 0) {
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XmlElement xep = document.CreateElement (XmlEncryption.ElementNames.EncryptionProperties, EncryptedXml.XmlEncNamespaceUrl);
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foreach (EncryptionProperty p in EncryptionProperties)
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xep.AppendChild (p.GetXml (document));
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xel.AppendChild (xep);
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}
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if (Id != null)
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xel.SetAttribute (XmlEncryption.AttributeNames.Id, Id);
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if (Type != null)
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xel.SetAttribute (XmlEncryption.AttributeNames.Type, Type);
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if (MimeType != null)
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xel.SetAttribute (XmlEncryption.AttributeNames.MimeType, MimeType);
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if (Encoding != null)
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xel.SetAttribute (XmlEncryption.AttributeNames.Encoding, Encoding);
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return xel;
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}
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public override void LoadXml (XmlElement value)
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{
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if (value == null)
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throw new ArgumentNullException ("value");
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if ((value.LocalName != XmlEncryption.ElementNames.EncryptedData) || (value.NamespaceURI != EncryptedXml.XmlEncNamespaceUrl))
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throw new CryptographicException ("Malformed EncryptedData element.");
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else {
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EncryptionMethod = null;
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EncryptionMethod = null;
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EncryptionProperties.Clear ();
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Id = null;
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Type = null;
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MimeType = null;
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Encoding = null;
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foreach (XmlNode n in value.ChildNodes) {
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if (n is XmlWhitespace)
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continue;
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switch (n.LocalName) {
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case XmlEncryption.ElementNames.EncryptionMethod:
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EncryptionMethod = new EncryptionMethod ();
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EncryptionMethod.LoadXml ((XmlElement) n);
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break;
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case XmlSignature.ElementNames.KeyInfo:
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KeyInfo = new KeyInfo ();
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KeyInfo.LoadXml ((XmlElement) n);
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break;
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case XmlEncryption.ElementNames.CipherData:
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CipherData = new CipherData ();
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CipherData.LoadXml ((XmlElement) n);
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break;
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case XmlEncryption.ElementNames.EncryptionProperties:
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foreach (XmlElement element in ((XmlElement) n).GetElementsByTagName (XmlEncryption.ElementNames.EncryptionProperty, EncryptedXml.XmlEncNamespaceUrl))
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EncryptionProperties.Add (new EncryptionProperty (element));
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break;
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}
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}
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if (value.HasAttribute (XmlEncryption.AttributeNames.Id))
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Id = value.Attributes [XmlEncryption.AttributeNames.Id].Value;
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if (value.HasAttribute (XmlEncryption.AttributeNames.Type))
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Type = value.Attributes [XmlEncryption.AttributeNames.Type].Value;
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if (value.HasAttribute (XmlEncryption.AttributeNames.MimeType))
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MimeType = value.Attributes [XmlEncryption.AttributeNames.MimeType].Value;
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if (value.HasAttribute (XmlEncryption.AttributeNames.Encoding))
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Encoding = value.Attributes [XmlEncryption.AttributeNames.Encoding].Value;
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}
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}
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#endregion // Methods
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}
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}
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