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// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
// <OWNER>Microsoft</OWNER>
//
//
// EncryptedData.cs
//
// This object implements the EncryptedData element.
//
// 04/01/2002
//
namespace System.Security.Cryptography.Xml
{
using System;
using System.Collections;
using System.Xml;
[System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
public sealed class EncryptedData : EncryptedType {
public override void LoadXml(XmlElement value) {
if (value == null)
throw new ArgumentNullException("value");
XmlNamespaceManager nsm = new XmlNamespaceManager(value.OwnerDocument.NameTable);
nsm.AddNamespace("enc", EncryptedXml.XmlEncNamespaceUrl);
nsm.AddNamespace("ds", SignedXml.XmlDsigNamespaceUrl);
this.Id = Utils.GetAttribute(value, "Id", EncryptedXml.XmlEncNamespaceUrl);
this.Type = Utils.GetAttribute(value, "Type", EncryptedXml.XmlEncNamespaceUrl);
this.MimeType = Utils.GetAttribute(value, "MimeType", EncryptedXml.XmlEncNamespaceUrl);
this.Encoding = Utils.GetAttribute(value, "Encoding", EncryptedXml.XmlEncNamespaceUrl);
XmlNode encryptionMethodNode = value.SelectSingleNode("enc:EncryptionMethod", nsm);
// EncryptionMethod
this.EncryptionMethod = new EncryptionMethod();
if (encryptionMethodNode != null)
this.EncryptionMethod.LoadXml(encryptionMethodNode as XmlElement);
// Key Info
this.KeyInfo = new KeyInfo();
XmlNode keyInfoNode = value.SelectSingleNode("ds:KeyInfo", nsm);
if (keyInfoNode != null)
this.KeyInfo.LoadXml(keyInfoNode as XmlElement);
// CipherData
XmlNode cipherDataNode = value.SelectSingleNode("enc:CipherData", nsm);
if (cipherDataNode == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_MissingCipherData"));
this.CipherData = new CipherData();
this.CipherData.LoadXml(cipherDataNode as XmlElement);
// EncryptionProperties
XmlNode encryptionPropertiesNode = value.SelectSingleNode("enc:EncryptionProperties", nsm);
if (encryptionPropertiesNode != null) {
// Select the EncryptionProperty elements inside the EncryptionProperties element
XmlNodeList encryptionPropertyNodes = encryptionPropertiesNode.SelectNodes("enc:EncryptionProperty", nsm);
if (encryptionPropertyNodes != null) {
foreach (XmlNode node in encryptionPropertyNodes) {
EncryptionProperty ep = new EncryptionProperty();
ep.LoadXml(node as XmlElement);
this.EncryptionProperties.Add(ep);
}
}
}
// Save away the cached value
m_cachedXml = value;
}
public override XmlElement GetXml() {
if (CacheValid) return(m_cachedXml);
XmlDocument document = new XmlDocument();
document.PreserveWhitespace = true;
return GetXml(document);
}
internal XmlElement GetXml (XmlDocument document) {
// Create the EncryptedData element
XmlElement encryptedDataElement = (XmlElement) document.CreateElement("EncryptedData", EncryptedXml.XmlEncNamespaceUrl);
// Deal with attributes
if (!String.IsNullOrEmpty(this.Id))
encryptedDataElement.SetAttribute("Id", this.Id);
if (!String.IsNullOrEmpty(this.Type))
encryptedDataElement.SetAttribute("Type", this.Type);
if (!String.IsNullOrEmpty(this.MimeType))
encryptedDataElement.SetAttribute("MimeType", this.MimeType);
if (!String.IsNullOrEmpty(this.Encoding))
encryptedDataElement.SetAttribute("Encoding", this.Encoding);
// EncryptionMethod
if (this.EncryptionMethod != null)
encryptedDataElement.AppendChild(this.EncryptionMethod.GetXml(document));
// KeyInfo
if (this.KeyInfo.Count > 0)
encryptedDataElement.AppendChild(this.KeyInfo.GetXml(document));
// CipherData is required.
if (this.CipherData == null)
throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_MissingCipherData"));
encryptedDataElement.AppendChild(this.CipherData.GetXml(document));
// EncryptionProperties
if (this.EncryptionProperties.Count > 0) {
XmlElement encryptionPropertiesElement = document.CreateElement("EncryptionProperties", EncryptedXml.XmlEncNamespaceUrl);
for (int index = 0; index < this.EncryptionProperties.Count; index++) {
EncryptionProperty ep = this.EncryptionProperties.Item(index);
encryptionPropertiesElement.AppendChild(ep.GetXml(document));
}
encryptedDataElement.AppendChild(encryptionPropertiesElement);
}
return encryptedDataElement;
}
}
}
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