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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Security
{
using System;
using System.Collections.ObjectModel;
using System.IdentityModel.Policy;
using System.IdentityModel.Selectors;
using System.IdentityModel.Tokens;
using System.Runtime;
using System.Security.Cryptography.X509Certificates;
using System.ServiceModel;
using System.Xml;
using SchProtocols = System.IdentityModel.SchProtocols;
class TlsnegoTokenProvider : SspiNegotiationTokenProvider
{
SecurityTokenAuthenticator serverTokenAuthenticator;
SecurityTokenProvider clientTokenProvider;
public TlsnegoTokenProvider()
: base()
{
// empty
}
public SecurityTokenAuthenticator ServerTokenAuthenticator
{
get
{
return this.serverTokenAuthenticator;
}
set
{
this.CommunicationObject.ThrowIfDisposedOrImmutable();
this.serverTokenAuthenticator = value;
}
}
public SecurityTokenProvider ClientTokenProvider
{
get
{
return this.clientTokenProvider;
}
set
{
this.CommunicationObject.ThrowIfDisposedOrImmutable();
this.clientTokenProvider = value;
}
}
// helpers
static X509SecurityToken ValidateToken(SecurityToken token)
{
X509SecurityToken result = token as X509SecurityToken;
if (result == null && token != null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.TokenProviderReturnedBadToken, token.GetType().ToString())));
}
return result;
}
SspiNegotiationTokenProviderState CreateTlsSspiState(X509SecurityToken token)
{
X509Certificate2 clientCertificate;
if (token == null)
{
clientCertificate = null;
}
else
{
clientCertificate = token.Certificate;
}
TlsSspiNegotiation tlsNegotiation = new TlsSspiNegotiation(String.Empty, SchProtocols.Ssl3Client | SchProtocols.TlsClient, clientCertificate);
return new SspiNegotiationTokenProviderState(tlsNegotiation);
}
// overrides
public override XmlDictionaryString NegotiationValueType
{
get
{
if (this.StandardsManager.MessageSecurityVersion.TrustVersion == TrustVersion.WSTrustFeb2005)
{
return XD.TrustApr2004Dictionary.TlsnegoValueTypeUri;
}
else if (this.StandardsManager.MessageSecurityVersion.TrustVersion == TrustVersion.WSTrust13)
{
return DXD.TrustDec2005Dictionary.TlsnegoValueTypeUri;
}
// Not supported
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException());
}
}
protected override bool CreateNegotiationStateCompletesSynchronously(EndpointAddress target, Uri via)
{
if (this.ClientTokenProvider == null)
{
return true;
}
else
{
return false;
}
}
protected override IAsyncResult BeginCreateNegotiationState(EndpointAddress target, Uri via, TimeSpan timeout, AsyncCallback callback, object state)
{
EnsureEndpointAddressDoesNotRequireEncryption(target);
if (this.ClientTokenProvider == null)
{
return new CompletedAsyncResult<SspiNegotiationTokenProviderState>(CreateTlsSspiState(null), callback, state);
}
else
{
return new CreateSspiStateAsyncResult(target, via, this, timeout, callback, state);
}
}
protected override SspiNegotiationTokenProviderState EndCreateNegotiationState(IAsyncResult result)
{
if (result is CompletedAsyncResult<SspiNegotiationTokenProviderState>)
{
return CompletedAsyncResult<SspiNegotiationTokenProviderState>.End(result);
}
else
{
return CreateSspiStateAsyncResult.End(result);
}
}
protected override SspiNegotiationTokenProviderState CreateNegotiationState(EndpointAddress target, Uri via, TimeSpan timeout)
{
EnsureEndpointAddressDoesNotRequireEncryption(target);
X509SecurityToken clientToken;
if (this.ClientTokenProvider == null)
{
clientToken = null;
}
else
{
SecurityToken token = this.ClientTokenProvider.GetToken(timeout);
clientToken = ValidateToken(token);
}
return CreateTlsSspiState(clientToken);
}
protected override ReadOnlyCollection<IAuthorizationPolicy> ValidateSspiNegotiation(ISspiNegotiation sspiNegotiation)
{
TlsSspiNegotiation tlsNegotiation = (TlsSspiNegotiation)sspiNegotiation;
if (tlsNegotiation.IsValidContext == false)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityNegotiationException(SR.GetString(SR.InvalidSspiNegotiation)));
}
X509Certificate2 serverCert = tlsNegotiation.RemoteCertificate;
if (serverCert == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityNegotiationException(SR.GetString(SR.ServerCertificateNotProvided)));
}
ReadOnlyCollection<IAuthorizationPolicy> authzPolicies;
if (this.ServerTokenAuthenticator != null)
{
X509SecurityToken certToken = new X509SecurityToken(serverCert, false);
authzPolicies = this.ServerTokenAuthenticator.ValidateToken(certToken);
}
else
{
authzPolicies = EmptyReadOnlyCollection<IAuthorizationPolicy>.Instance;
}
return authzPolicies;
}
public override void OnOpen(TimeSpan timeout)
{
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
if (this.ClientTokenProvider != null)
{
SecurityUtils.OpenTokenProviderIfRequired(this.ClientTokenProvider, timeoutHelper.RemainingTime());
}
if (this.ServerTokenAuthenticator != null)
{
SecurityUtils.OpenTokenAuthenticatorIfRequired(this.ServerTokenAuthenticator, timeoutHelper.RemainingTime());
}
base.OnOpen(timeoutHelper.RemainingTime());
}
public override void OnClose(TimeSpan timeout)
{
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
if (this.clientTokenProvider != null)
{
SecurityUtils.CloseTokenProviderIfRequired(this.ClientTokenProvider, timeoutHelper.RemainingTime());
this.clientTokenProvider = null;
}
if (this.serverTokenAuthenticator != null)
{
SecurityUtils.CloseTokenAuthenticatorIfRequired(this.ServerTokenAuthenticator, timeoutHelper.RemainingTime());
this.serverTokenAuthenticator = null;
}
base.OnClose(timeoutHelper.RemainingTime());
}
public override void OnAbort()
{
if (this.clientTokenProvider != null)
{
SecurityUtils.AbortTokenProviderIfRequired(this.ClientTokenProvider);
this.clientTokenProvider = null;
}
if (this.serverTokenAuthenticator != null)
{
SecurityUtils.AbortTokenAuthenticatorIfRequired(this.ServerTokenAuthenticator);
this.serverTokenAuthenticator = null;
}
base.OnAbort();
}
class CreateSspiStateAsyncResult : AsyncResult
{
static readonly AsyncCallback getTokensCallback = Fx.ThunkCallback(new AsyncCallback(GetTokensCallback));
TlsnegoTokenProvider tlsTokenProvider;
SspiNegotiationTokenProviderState sspiState;
public CreateSspiStateAsyncResult(EndpointAddress target, Uri via, TlsnegoTokenProvider tlsTokenProvider, TimeSpan timeout, AsyncCallback callback, object state)
: base(callback, state)
{
this.tlsTokenProvider = tlsTokenProvider;
IAsyncResult result = this.tlsTokenProvider.ClientTokenProvider.BeginGetToken(timeout, getTokensCallback, this);
if (!result.CompletedSynchronously)
{
return;
}
SecurityToken token = this.tlsTokenProvider.ClientTokenProvider.EndGetToken(result);
X509SecurityToken clientToken = ValidateToken(token);
this.sspiState = this.tlsTokenProvider.CreateTlsSspiState(clientToken);
base.Complete(true);
}
static void GetTokensCallback(IAsyncResult result)
{
if (result.CompletedSynchronously)
{
return;
}
CreateSspiStateAsyncResult typedResult = (CreateSspiStateAsyncResult)result.AsyncState;
try
{
SecurityToken token = typedResult.tlsTokenProvider.ClientTokenProvider.EndGetToken(result);
X509SecurityToken clientToken = TlsnegoTokenProvider.ValidateToken(token);
typedResult.sspiState = typedResult.tlsTokenProvider.CreateTlsSspiState(clientToken);
typedResult.Complete(false);
}
catch (Exception e)
{
if (Fx.IsFatal(e)) throw;
typedResult.Complete(false, e);
}
}
public static SspiNegotiationTokenProviderState End(IAsyncResult result)
{
CreateSspiStateAsyncResult asyncResult = AsyncResult.End<CreateSspiStateAsyncResult>(result);
return asyncResult.sspiState;
}
}
}
}
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