XmlEncApr2001.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Security / XmlEncApr2001.cs / 1 / XmlEncApr2001.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.ServiceModel.Security 
{
    using HexBinary = System.Runtime.Remoting.Metadata.W3cXsd2001.SoapHexBinary; 
    using System; 
    using System.ServiceModel;
    using System.Collections; 
    using System.Collections.Generic;
    using System.Diagnostics;
    using System.Globalization;
    using System.IO; 
    using System.Text;
    using System.Threading; 
    using System.Xml; 
    using System.IdentityModel.Claims;
    using System.IdentityModel.Policy; 
    using System.IdentityModel.Tokens;
    using System.IdentityModel.Selectors;
    using System.Security.Cryptography.X509Certificates;
    using System.ServiceModel.Security.Tokens; 
    using System.ServiceModel.Channels;
    using System.ServiceModel.Security; 
    using System.Runtime.Serialization; 

    using KeyIdentifierEntry = WSSecurityTokenSerializer.KeyIdentifierEntry; 
    using KeyIdentifierClauseEntry = WSSecurityTokenSerializer.KeyIdentifierClauseEntry;
    using TokenEntry = WSSecurityTokenSerializer.TokenEntry;
    using SignedXml = System.IdentityModel.SignedXml;
 
    class XmlEncApr2001 : WSSecurityTokenSerializer.SerializerEntries
    { 
        WSSecurityTokenSerializer tokenSerializer; 

        public XmlEncApr2001(WSSecurityTokenSerializer tokenSerializer) 
        {
            this.tokenSerializer = tokenSerializer;
        }
 
        public override void PopulateKeyIdentifierClauseEntries(IList keyIdentifierClauseEntries)
        { 
            keyIdentifierClauseEntries.Add(new EncryptedKeyClauseEntry(this.tokenSerializer)); 
        }
 
        internal class EncryptedKeyClauseEntry : KeyIdentifierClauseEntry
        {
            WSSecurityTokenSerializer tokenSerializer;
 
            public EncryptedKeyClauseEntry(WSSecurityTokenSerializer tokenSerializer)
            { 
                this.tokenSerializer = tokenSerializer; 
            }
 
            protected override XmlDictionaryString LocalName
            {
                get
                { 
                    return XD.XmlEncryptionDictionary.EncryptedKey;
                } 
            } 

            protected override XmlDictionaryString NamespaceUri 
            {
                get
                {
                    return XD.XmlEncryptionDictionary.Namespace; 
                }
            } 
 
            public override SecurityKeyIdentifierClause ReadKeyIdentifierClauseCore(XmlDictionaryReader reader)
            { 
                string encryptionMethod = null;
                string carriedKeyName = null;
                SecurityKeyIdentifier encryptingKeyIdentifier = null;
                byte[] encryptedKey = null; 

                reader.ReadStartElement(XD.XmlEncryptionDictionary.EncryptedKey, NamespaceUri); 
 
                if (reader.IsStartElement(XD.XmlEncryptionDictionary.EncryptionMethod, NamespaceUri))
                { 
                    encryptionMethod = reader.GetAttribute(XD.XmlEncryptionDictionary.AlgorithmAttribute, null);
                    bool isEmptyElement = reader.IsEmptyElement;
                    reader.ReadStartElement();
                    if (!isEmptyElement) 
                    {
                        while (reader.IsStartElement()) 
                        { 
                            reader.Skip();
                        } 
                        reader.ReadEndElement();
                    }
                }
 
                if (this.tokenSerializer.CanReadKeyIdentifier(reader))
                { 
                    encryptingKeyIdentifier = this.tokenSerializer.ReadKeyIdentifier(reader); 
                }
 
                reader.ReadStartElement(XD.XmlEncryptionDictionary.CipherData, NamespaceUri);
                reader.ReadStartElement(XD.XmlEncryptionDictionary.CipherValue, NamespaceUri);
                encryptedKey = reader.ReadContentAsBase64();
                reader.ReadEndElement(); 
                reader.ReadEndElement();
 
                if (reader.IsStartElement(XD.XmlEncryptionDictionary.CarriedKeyName, NamespaceUri)) 
                {
                    reader.ReadStartElement(); 
                    carriedKeyName = reader.ReadString();
                    reader.ReadEndElement();
                }
 
                reader.ReadEndElement();
 
                return new EncryptedKeyIdentifierClause(encryptedKey, encryptionMethod, encryptingKeyIdentifier, carriedKeyName); 
            }
 
            public override bool SupportsCore(SecurityKeyIdentifierClause keyIdentifierClause)
            {
                return keyIdentifierClause is EncryptedKeyIdentifierClause;
            } 

            public override void WriteKeyIdentifierClauseCore(XmlDictionaryWriter writer, SecurityKeyIdentifierClause keyIdentifierClause) 
            { 
                EncryptedKeyIdentifierClause encryptedKeyClause = keyIdentifierClause as EncryptedKeyIdentifierClause;
 
                writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.EncryptedKey, NamespaceUri);

                if (encryptedKeyClause.EncryptionMethod != null)
                { 
                    writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.EncryptionMethod, NamespaceUri);
                    writer.WriteAttributeString(XD.XmlEncryptionDictionary.AlgorithmAttribute, null, encryptedKeyClause.EncryptionMethod); 
                    if (encryptedKeyClause.EncryptionMethod == XD.SecurityAlgorithmDictionary.RsaOaepKeyWrap.Value) 
                    {
                        writer.WriteStartElement(XmlSignatureStrings.Prefix, XD.XmlSignatureDictionary.DigestMethod, XD.XmlSignatureDictionary.Namespace); 
                        writer.WriteAttributeString(XD.XmlSignatureDictionary.Algorithm, null, SecurityAlgorithms.Sha1Digest);
                        writer.WriteEndElement();
                    }
                    writer.WriteEndElement(); 
                }
 
                if (encryptedKeyClause.EncryptingKeyIdentifier != null) 
                {
                    this.tokenSerializer.WriteKeyIdentifier(writer, encryptedKeyClause.EncryptingKeyIdentifier); 
                }

                writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.CipherData, NamespaceUri);
                writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.CipherValue, NamespaceUri); 
                byte[] encryptedKey = encryptedKeyClause.GetEncryptedKey();
                writer.WriteBase64(encryptedKey, 0, encryptedKey.Length); 
                writer.WriteEndElement(); 
                writer.WriteEndElement();
 
                if (encryptedKeyClause.CarriedKeyName != null)
                {
                    writer.WriteElementString(XD.XmlEncryptionDictionary.Prefix.Value, XD.XmlEncryptionDictionary.CarriedKeyName, NamespaceUri, encryptedKeyClause.CarriedKeyName);
                } 

                writer.WriteEndElement(); 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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XmlEncApr2001.cs source code in C# .NET

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