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//------------------------------------------------------------
// 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.ComponentModel;
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;
}
[DefaultValue(ConnectionOrientedTransportDefaults.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<TChannel> BuildChannelFactory<TChannel>(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<TChannel>();
}
public override bool CanBuildChannelFactory<TChannel>(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<TChannel>();
}
public override IChannelListener<TChannel> BuildChannelListener<TChannel>(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<TChannel>();
}
public override bool CanBuildChannelListener<TChannel>(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<TChannel>();
}
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<T>(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<T>();
}
}
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.ExportPolicyForTransportTokenAssertionProviders(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;
}
}
}
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