EncryptedData.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / ManagedLibraries / Security / System / Security / Cryptography / Xml / EncryptedData.cs / 1305376 / EncryptedData.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// 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;
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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