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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System.Security.Authentication;
using System.ComponentModel;
using System.Collections.Generic;
using System.Net.Security;
using System.ServiceModel.Description;
using System.ServiceModel;
using System.ServiceModel.Security;
using System.ServiceModel.Security.Tokens;
using System.Xml;
public class SslStreamSecurityBindingElement : StreamUpgradeBindingElement, ITransportTokenAssertionProvider, IPolicyExportExtension
{
IdentityVerifier identityVerifier;
bool requireClientCertificate;
SslProtocols sslProtocols;
public SslStreamSecurityBindingElement()
{
this.requireClientCertificate = TransportDefaults.RequireClientCertificate;
this.sslProtocols = TransportDefaults.SslProtocols;
}
protected SslStreamSecurityBindingElement(SslStreamSecurityBindingElement elementToBeCloned)
: base(elementToBeCloned)
{
this.identityVerifier = elementToBeCloned.identityVerifier;
this.requireClientCertificate = elementToBeCloned.requireClientCertificate;
this.sslProtocols = elementToBeCloned.sslProtocols;
}
public IdentityVerifier IdentityVerifier
{
get
{
if (this.identityVerifier == null)
{
this.identityVerifier = IdentityVerifier.CreateDefault();
}
return this.identityVerifier;
}
set
{
if (value == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value");
}
this.identityVerifier = value;
}
}
[DefaultValue(TransportDefaults.RequireClientCertificate)]
public bool RequireClientCertificate
{
get
{
return this.requireClientCertificate;
}
set
{
this.requireClientCertificate = value;
}
}
[DefaultValue(TransportDefaults.SslProtocols)]
public SslProtocols SslProtocols
{
get
{
return this.sslProtocols;
}
set
{
SslProtocolsHelper.Validate(value);
this.sslProtocols = value;
}
}
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 BindingElement Clone()
{
return new SslStreamSecurityBindingElement(this);
}
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(this.RequireClientCertificate, true, this.RequireClientCertificate,
ProtectionLevel.EncryptAndSign, ProtectionLevel.EncryptAndSign);
}
else if (typeof(T) == typeof(IdentityVerifier))
{
return (T)(object)this.IdentityVerifier;
}
else
{
return context.GetInnerProperty<T>();
}
}
public override StreamUpgradeProvider BuildClientStreamUpgradeProvider(BindingContext context)
{
return SslStreamSecurityUpgradeProvider.CreateClientProvider(this, context);
}
public override StreamUpgradeProvider BuildServerStreamUpgradeProvider(BindingContext context)
{
return SslStreamSecurityUpgradeProvider.CreateServerProvider(this, context);
}
internal static void ImportPolicy(MetadataImporter importer, PolicyConversionContext policyContext)
{
XmlElement assertion = PolicyConversionContext.FindAssertion(policyContext.GetBindingAssertions(),
TransportPolicyConstants.SslTransportSecurityName, TransportPolicyConstants.DotNetFramingNamespace, true);
if (assertion != null)
{
SslStreamSecurityBindingElement sslBindingElement = new SslStreamSecurityBindingElement();
XmlReader reader = new XmlNodeReader(assertion);
reader.ReadStartElement();
sslBindingElement.RequireClientCertificate = reader.IsStartElement(
TransportPolicyConstants.RequireClientCertificateName,
TransportPolicyConstants.DotNetFramingNamespace);
if (sslBindingElement.RequireClientCertificate)
{
reader.ReadElementString();
}
policyContext.BindingElements.Add(sslBindingElement);
}
}
#region ITransportTokenAssertionProvider Members
public XmlElement GetTransportTokenAssertion()
{
XmlDocument document = new XmlDocument();
XmlElement assertion =
document.CreateElement(TransportPolicyConstants.DotNetFramingPrefix,
TransportPolicyConstants.SslTransportSecurityName,
TransportPolicyConstants.DotNetFramingNamespace);
if (this.requireClientCertificate)
{
assertion.AppendChild(document.CreateElement(TransportPolicyConstants.DotNetFramingPrefix,
TransportPolicyConstants.RequireClientCertificateName,
TransportPolicyConstants.DotNetFramingNamespace));
}
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;
}
SslStreamSecurityBindingElement ssl = b as SslStreamSecurityBindingElement;
if (ssl == null)
{
return false;
}
return this.requireClientCertificate == ssl.requireClientCertificate && this.sslProtocols == ssl.sslProtocols;
}
[EditorBrowsable(EditorBrowsableState.Never)]
public bool ShouldSerializeIdentityVerifier()
{
// IdentifyVerifier.CreateDefault() grabs the static instance of nested DefaultIdentityVerifier.
// DefaultIdentityVerifier can't be serialized directly because it's nested.
return (!object.ReferenceEquals(this.IdentityVerifier, IdentityVerifier.CreateDefault()));
}
}
}
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