WindowsStreamSecurityBindingElement.cs source code in C# .NET

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

namespace System.ServiceModel.Channels 
{
    using System.Collections.Generic; 
    using System.ServiceModel.Description; 
    using System.Net.Security;
    using System.ServiceModel; 
    using System.ServiceModel.Security;

    using System.Xml;
 
    public class WindowsStreamSecurityBindingElement : StreamUpgradeBindingElement,
        ITransportTokenAssertionProvider, 
        IPolicyExportExtension 
    {
        ProtectionLevel protectionLevel; 

        public WindowsStreamSecurityBindingElement()
            : base()
        { 
            this.protectionLevel = ConnectionOrientedTransportDefaults.ProtectionLevel;
        } 
 
        protected WindowsStreamSecurityBindingElement(WindowsStreamSecurityBindingElement elementToBeCloned)
            : base(elementToBeCloned) 
        {
            this.protectionLevel = elementToBeCloned.protectionLevel;
        }
 
        public ProtectionLevel ProtectionLevel
        { 
            get 
            {
                return this.protectionLevel; 
            }
            set
            {
                ProtectionLevelHelper.Validate(value); 
                this.protectionLevel = value;
            } 
        } 

        public override BindingElement Clone() 
        {
            return new WindowsStreamSecurityBindingElement(this);
        }
 
        public override IChannelFactory BuildChannelFactory(BindingContext context)
        { 
            if (context == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("context"); 
            }

#pragma warning suppress 56506 // [....], BindingContext.BindingParameters cannot be null
            context.BindingParameters.Add(this); 
            return context.BuildInnerChannelFactory();
        } 
 
        public override bool CanBuildChannelFactory(BindingContext context)
        { 
            if (context == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("context");
            } 

#pragma warning suppress 56506 // [....], BindingContext.BindingParameters cannot be null 
            context.BindingParameters.Add(this); 
            return context.CanBuildInnerChannelFactory();
        } 

        public override IChannelListener BuildChannelListener(BindingContext context)
        {
            if (context == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("context"); 
            } 

#pragma warning suppress 56506 // [....], BindingContext.BindingParameters cannot be null 
            context.BindingParameters.Add(this);
            return context.BuildInnerChannelListener();
        }
 
        public override bool CanBuildChannelListener(BindingContext context)
        { 
            if (context == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("context"); 
            }

#pragma warning suppress 56506 // [....], BindingContext.BindingParameters cannot be null
            context.BindingParameters.Add(this); 
            return context.CanBuildInnerChannelListener();
        } 
 
        public override StreamUpgradeProvider BuildClientStreamUpgradeProvider(BindingContext context)
        { 
            return new WindowsStreamSecurityUpgradeProvider(this, context, true);
        }

        public override StreamUpgradeProvider BuildServerStreamUpgradeProvider(BindingContext context) 
        {
            return new WindowsStreamSecurityUpgradeProvider(this, context, false); 
        } 

        public override T GetProperty(BindingContext context) 
        {
            if (context == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("context"); 
            }
 
            if (typeof(T) == typeof(ISecurityCapabilities)) 
            {
                return (T)(object)new SecurityCapabilities(true, true, true, protectionLevel, protectionLevel); 
            }
            else if (typeof(T) == typeof(IdentityVerifier))
            {
                return (T)(object)IdentityVerifier.CreateDefault(); 
            }
            else 
            { 
                return context.GetInnerProperty();
            } 
        }


        internal static void ImportPolicy(MetadataImporter importer, PolicyConversionContext policyContext) 
        {
            XmlElement assertion = PolicyConversionContext.FindAssertion(policyContext.GetBindingAssertions(), 
                TransportPolicyConstants.WindowsTransportSecurityName, TransportPolicyConstants.DotNetFramingNamespace, true); 

            if (assertion != null) 
            {
                WindowsStreamSecurityBindingElement windowsBindingElement
                    = new WindowsStreamSecurityBindingElement();
 
                XmlReader reader = new XmlNodeReader(assertion);
                reader.ReadStartElement(); 
                string protectionLevelString = null; 
                if (reader.IsStartElement(
                    TransportPolicyConstants.ProtectionLevelName, 
                    TransportPolicyConstants.DotNetFramingNamespace) && !reader.IsEmptyElement)
                {
                    protectionLevelString = reader.ReadElementContentAsString();
                } 
                if (string.IsNullOrEmpty(protectionLevelString))
                { 
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException( 
                        SR.GetString(SR.ExpectedElementMissing, TransportPolicyConstants.ProtectionLevelName, TransportPolicyConstants.DotNetFramingNamespace)));
                } 
                windowsBindingElement.ProtectionLevel = (ProtectionLevel)Enum.Parse(typeof(ProtectionLevel), protectionLevelString);
                policyContext.BindingElements.Add(windowsBindingElement);
            }
        } 

        #region ITransportTokenAssertionProvider Members 
 
        public XmlElement GetTransportTokenAssertion()
        { 
            XmlDocument document = new XmlDocument();
            XmlElement assertion =
                document.CreateElement(TransportPolicyConstants.DotNetFramingPrefix,
                TransportPolicyConstants.WindowsTransportSecurityName, 
                TransportPolicyConstants.DotNetFramingNamespace);
            XmlElement protectionLevelElement = document.CreateElement(TransportPolicyConstants.DotNetFramingPrefix, 
                TransportPolicyConstants.ProtectionLevelName, TransportPolicyConstants.DotNetFramingNamespace); 
            protectionLevelElement.AppendChild(document.CreateTextNode(this.ProtectionLevel.ToString()));
            assertion.AppendChild(protectionLevelElement); 
            return assertion;
        }

        #endregion 

 
        void IPolicyExportExtension.ExportPolicy(MetadataExporter exporter, PolicyConversionContext context) 
        {
            if (exporter == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("exporter");
            }
            if (context == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("context"); 
            } 

            SecurityBindingElement.ExportPolicy(exporter, context); 
        }

        internal override bool IsMatch(BindingElement b)
        { 
            if (b == null)
            { 
                return false; 
            }
            WindowsStreamSecurityBindingElement security = b as WindowsStreamSecurityBindingElement; 
            if (security == null)
            {
                return false;
            } 
            if (this.protectionLevel != security.protectionLevel)
            { 
                return false; 
            }
 
            return true;
        }
    }
} 

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

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