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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Security
{
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IdentityModel.Claims;
using System.IdentityModel.Policy;
using System.Net;
using System.Runtime;
using System.Security.Authentication.ExtendedProtection;
using System.Security.Principal;
using System.ServiceModel;
using System.ServiceModel.Diagnostics;
using System.Xml;
using SafeCloseHandle = System.IdentityModel.SafeCloseHandle;
using SafeFreeCredentials = System.IdentityModel.SafeFreeCredentials;
sealed class SpnegoTokenAuthenticator : SspiNegotiationTokenAuthenticator
{
bool extractGroupsForWindowsAccounts;
NetworkCredential serverCredential;
bool allowUnauthenticatedCallers;
SafeFreeCredentials credentialsHandle;
public SpnegoTokenAuthenticator()
: base()
{
// empty
}
// settings
public bool ExtractGroupsForWindowsAccounts
{
get
{
return this.extractGroupsForWindowsAccounts;
}
set
{
this.CommunicationObject.ThrowIfDisposedOrImmutable();
this.extractGroupsForWindowsAccounts = value;
}
}
public NetworkCredential ServerCredential
{
get
{
return this.serverCredential;
}
set
{
this.CommunicationObject.ThrowIfDisposedOrImmutable();
this.serverCredential = value;
}
}
public bool AllowUnauthenticatedCallers
{
get
{
return this.allowUnauthenticatedCallers;
}
set
{
this.CommunicationObject.ThrowIfDisposedOrImmutable();
this.allowUnauthenticatedCallers = value;
}
}
// overrides
public override XmlDictionaryString NegotiationValueType
{
get
{
return XD.TrustApr2004Dictionary.SpnegoValueTypeUri;
}
}
public override void OnOpening()
{
base.OnOpening();
if (this.credentialsHandle == null)
{
this.credentialsHandle = SecurityUtils.GetCredentialsHandle("Negotiate", this.serverCredential, true);
}
}
public override void OnClose(TimeSpan timeout)
{
base.OnClose(timeout);
FreeCredentialsHandle();
}
public override void OnAbort()
{
base.OnAbort();
FreeCredentialsHandle();
}
void FreeCredentialsHandle()
{
if (this.credentialsHandle != null)
{
this.credentialsHandle.Close();
this.credentialsHandle = null;
}
}
protected override SspiNegotiationTokenAuthenticatorState CreateSspiState(byte[] incomingBlob, string incomingValueTypeUri)
{
ISspiNegotiation windowsNegotiation = new WindowsSspiNegotiation("Negotiate", this.credentialsHandle, DefaultServiceBinding);
return new SspiNegotiationTokenAuthenticatorState(windowsNegotiation);
}
protected override ReadOnlyCollection<IAuthorizationPolicy> ValidateSspiNegotiation(ISspiNegotiation sspiNegotiation)
{
WindowsSspiNegotiation windowsNegotiation = (WindowsSspiNegotiation)sspiNegotiation;
if (windowsNegotiation.IsValidContext == false)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperWarning(new SecurityNegotiationException(SR.GetString(SR.InvalidSspiNegotiation)));
}
SecurityTraceRecordHelper.TraceServiceSpnego(windowsNegotiation);
if (this.IsClientAnonymous)
{
return EmptyReadOnlyCollection<IAuthorizationPolicy>.Instance;
}
using (SafeCloseHandle contextToken = windowsNegotiation.GetContextToken())
{
WindowsIdentity windowsIdentity = new WindowsIdentity(contextToken.DangerousGetHandle(), windowsNegotiation.ProtocolName);
SecurityUtils.ValidateAnonymityConstraint(windowsIdentity, this.AllowUnauthenticatedCallers);
List<IAuthorizationPolicy> policies = new List<IAuthorizationPolicy>(1);
WindowsClaimSet wic = new WindowsClaimSet( windowsIdentity, windowsNegotiation.ProtocolName, this.extractGroupsForWindowsAccounts, false );
policies.Add(new System.IdentityModel.Policy.UnconditionalPolicy(wic, TimeoutHelper.Add(DateTime.UtcNow, base.ServiceTokenLifetime)));
return policies.AsReadOnly();
}
}
}
}
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