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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel
{
using System;
using System.ServiceModel.Channels;
using System.ServiceModel.Security;
using System.IdentityModel.Claims;
using System.IdentityModel.Policy;
using System.IdentityModel.Tokens;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Security.Principal;
public class ServiceSecurityContext
{
static ServiceSecurityContext anonymous;
ReadOnlyCollection<IAuthorizationPolicy> authorizationPolicies;
AuthorizationContext authorizationContext;
IIdentity primaryIdentity;
Claim identityClaim;
WindowsIdentity windowsIdentity;
// Perf: delay created authorizationContext using forward chain.
public ServiceSecurityContext(ReadOnlyCollection<IAuthorizationPolicy> authorizationPolicies)
{
if (authorizationPolicies == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("authorizationPolicies");
}
this.authorizationContext = null;
this.authorizationPolicies = authorizationPolicies;
}
public ServiceSecurityContext(AuthorizationContext authorizationContext)
: this(authorizationContext, EmptyReadOnlyCollection<IAuthorizationPolicy>.Instance)
{
}
public ServiceSecurityContext(AuthorizationContext authorizationContext, ReadOnlyCollection<IAuthorizationPolicy> authorizationPolicies)
{
if (authorizationContext == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("authorizationContext");
}
if (authorizationPolicies == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("authorizationPolicies");
}
this.authorizationContext = authorizationContext;
this.authorizationPolicies = authorizationPolicies;
}
public static ServiceSecurityContext Anonymous
{
get
{
if (anonymous == null)
{
anonymous = new ServiceSecurityContext(EmptyReadOnlyCollection<IAuthorizationPolicy>.Instance);
}
return anonymous;
}
}
public static ServiceSecurityContext Current
{
get
{
ServiceSecurityContext result = null;
OperationContext operationContext = OperationContext.Current;
if (operationContext != null)
{
MessageProperties properties = operationContext.IncomingMessageProperties;
if (properties != null)
{
SecurityMessageProperty security = properties.Security;
if (security != null)
{
result = security.ServiceSecurityContext;
}
}
}
return result;
}
}
public bool IsAnonymous
{
get
{
return this == Anonymous || this.IdentityClaim == null;
}
}
internal Claim IdentityClaim
{
get
{
if (this.identityClaim == null)
{
this.identityClaim = SecurityUtils.GetPrimaryIdentityClaim(this.AuthorizationContext);
}
return this.identityClaim;
}
}
public IIdentity PrimaryIdentity
{
get
{
if (this.primaryIdentity == null)
{
IIdentity primaryIdentity = null;
IList<IIdentity> identities = GetIdentities();
// Multiple Identities is treated as anonymous
if (identities != null && identities.Count == 1)
{
primaryIdentity = identities[0];
}
this.primaryIdentity = primaryIdentity ?? SecurityUtils.AnonymousIdentity;
}
return this.primaryIdentity;
}
}
public WindowsIdentity WindowsIdentity
{
get
{
if (this.windowsIdentity == null)
{
WindowsIdentity windowsIdentity = null;
IList<IIdentity> identities = GetIdentities();
if (identities != null)
{
for (int i = 0; i < identities.Count; ++i)
{
WindowsIdentity identity = identities[i] as WindowsIdentity;
if (identity != null)
{
// Multiple Identities is treated as anonymous
if (windowsIdentity != null)
{
windowsIdentity = WindowsIdentity.GetAnonymous();
break;
}
windowsIdentity = identity;
}
}
}
this.windowsIdentity = windowsIdentity ?? WindowsIdentity.GetAnonymous();
}
return this.windowsIdentity;
}
}
public ReadOnlyCollection<IAuthorizationPolicy> AuthorizationPolicies
{
get
{
return this.authorizationPolicies;
}
set
{
this.authorizationPolicies = value;
}
}
public AuthorizationContext AuthorizationContext
{
get
{
if (this.authorizationContext == null)
{
this.authorizationContext = AuthorizationContext.CreateDefaultAuthorizationContext(this.authorizationPolicies);
}
return this.authorizationContext;
}
}
IList<IIdentity> GetIdentities()
{
object identities;
AuthorizationContext authContext = this.AuthorizationContext;
if (authContext != null && authContext.Properties.TryGetValue(SecurityUtils.Identities, out identities))
{
return identities as IList<IIdentity>;
}
return null;
}
}
}
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