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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Security
{
using System.Security.Principal;
using System.ServiceModel.Channels;
using System.Xml;
sealed class ImpersonatingMessage : Message
{
Message innerMessage;
public ImpersonatingMessage(Message innerMessage)
{
if (innerMessage == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("innerMessage");
}
this.innerMessage = innerMessage;
}
public override bool IsEmpty
{
get
{
return this.innerMessage.IsEmpty;
}
}
public override bool IsFault
{
get { return this.innerMessage.IsFault; }
}
public override MessageHeaders Headers
{
get { return this.innerMessage.Headers; }
}
public override MessageProperties Properties
{
get { return this.innerMessage.Properties; }
}
public override MessageVersion Version
{
get { return this.innerMessage.Version; }
}
internal override RecycledMessageState RecycledMessageState
{
get
{
return this.innerMessage.RecycledMessageState;
}
}
protected override void OnClose()
{
base.OnClose();
this.innerMessage.Close();
}
//Runs impersonated.
protected override IAsyncResult OnBeginWriteMessage(XmlDictionaryWriter writer, AsyncCallback callback, object state)
{
ImpersonateOnSerializingReplyMessageProperty impersonationProperty = null;
IDisposable impersonationContext = null;
IPrincipal originalPrincipal = null;
bool isThreadPrincipalSet = false;
if (!ImpersonateOnSerializingReplyMessageProperty.TryGet(this.innerMessage, out impersonationProperty))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.UnableToImpersonateWhileSerializingReponse)));
}
try
{
impersonationProperty.StartImpersonation(out impersonationContext, out originalPrincipal, out isThreadPrincipalSet);
return this.innerMessage.BeginWriteMessage(writer, callback, state);
}
finally
{
try
{
impersonationProperty.StopImpersonation(impersonationContext, originalPrincipal, isThreadPrincipalSet);
}
#pragma warning suppress 56500 // covered by FxCOP
catch
{
string message = null;
try
{
message = SR.GetString(SR.SFxRevertImpersonationFailed0);
}
finally
{
DiagnosticUtility.FailFast(message);
}
}
}
}
//Runs impersonated.
protected override void OnWriteMessage(XmlDictionaryWriter writer)
{
this.ImpersonateCall(() => this.innerMessage.WriteMessage(writer));
}
protected override void OnEndWriteMessage(IAsyncResult result)
{
this.innerMessage.EndWriteMessage(result);
}
protected override void OnWriteStartEnvelope(XmlDictionaryWriter writer)
{
this.innerMessage.WriteStartEnvelope(writer);
}
protected override void OnWriteStartHeaders(XmlDictionaryWriter writer)
{
this.innerMessage.WriteStartHeaders(writer);
}
protected override void OnWriteStartBody(XmlDictionaryWriter writer)
{
this.innerMessage.WriteStartBody(writer);
}
protected override string OnGetBodyAttribute(string localName, string ns)
{
return this.innerMessage.GetBodyAttribute(localName, ns);
}
protected override MessageBuffer OnCreateBufferedCopy(int maxBufferSize)
{
return this.innerMessage.CreateBufferedCopy(maxBufferSize);
}
protected override IAsyncResult OnBeginWriteBodyContents(XmlDictionaryWriter writer, AsyncCallback callback, object state)
{
ImpersonateOnSerializingReplyMessageProperty impersonationProperty = null;
IDisposable impersonationContext = null;
IPrincipal originalPrincipal = null;
bool isThreadPrincipalSet = false;
if (!ImpersonateOnSerializingReplyMessageProperty.TryGet(this.innerMessage, out impersonationProperty))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.UnableToImpersonateWhileSerializingReponse)));
}
try
{
impersonationProperty.StartImpersonation(out impersonationContext, out originalPrincipal, out isThreadPrincipalSet);
return this.innerMessage.BeginWriteBodyContents(writer, callback, state);
}
finally
{
try
{
impersonationProperty.StopImpersonation(impersonationContext, originalPrincipal, isThreadPrincipalSet);
}
#pragma warning suppress 56500 // covered by FxCOP
catch
{
string message = null;
try
{
message = SR.GetString(SR.SFxRevertImpersonationFailed0);
}
finally
{
DiagnosticUtility.FailFast(message);
}
}
}
}
protected override void OnWriteBodyContents(XmlDictionaryWriter writer)
{
this.ImpersonateCall( () => this.innerMessage.WriteBodyContents(writer));
}
protected override void OnEndWriteBodyContents(IAsyncResult result)
{
this.innerMessage.EndWriteBodyContents(result);
}
//Runs impersonated.
protected override void OnBodyToString(XmlDictionaryWriter writer)
{
this.ImpersonateCall(() => this.innerMessage.BodyToString(writer));
}
void ImpersonateCall(Action callToImpersonate)
{
ImpersonateOnSerializingReplyMessageProperty impersonationProperty = null;
IDisposable impersonationContext = null;
IPrincipal originalPrincipal = null;
bool isThreadPrincipalSet = false;
if (!ImpersonateOnSerializingReplyMessageProperty.TryGet(this.innerMessage, out impersonationProperty))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.UnableToImpersonateWhileSerializingReponse)));
}
try
{
impersonationProperty.StartImpersonation(out impersonationContext, out originalPrincipal, out isThreadPrincipalSet);
callToImpersonate();
}
finally
{
try
{
impersonationProperty.StopImpersonation(impersonationContext, originalPrincipal, isThreadPrincipalSet);
}
#pragma warning suppress 56500 // covered by FxCOP
catch
{
string message = null;
try
{
message = SR.GetString(SR.SFxRevertImpersonationFailed0);
}
finally
{
DiagnosticUtility.FailFast(message);
}
}
}
}
}
}
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