ServiceSecurityContext.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / ServiceSecurityContext.cs / 1 / ServiceSecurityContext.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 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 authorizationPolicies;
        AuthorizationContext authorizationContext;
        IIdentity primaryIdentity; 
        Claim identityClaim;
        WindowsIdentity windowsIdentity; 
 
        // Perf: delay created authorizationContext using forward chain.
        public ServiceSecurityContext(ReadOnlyCollection authorizationPolicies) 
        {
            if (authorizationPolicies == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("authorizationPolicies"); 
            }
            this.authorizationContext = null; 
            this.authorizationPolicies = authorizationPolicies; 
        }
 
        public ServiceSecurityContext(AuthorizationContext authorizationContext)
            : this(authorizationContext, EmptyReadOnlyCollection.Instance)
        {
        } 

        public ServiceSecurityContext(AuthorizationContext authorizationContext, ReadOnlyCollection 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.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 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 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 AuthorizationPolicies
        {
            get 
            {
                return this.authorizationPolicies; 
            } 
        }
 
        public AuthorizationContext AuthorizationContext
        {
            get
            { 
                if (this.authorizationContext == null)
                { 
                    this.authorizationContext = AuthorizationContext.CreateDefaultAuthorizationContext(this.authorizationPolicies); 
                }
                return this.authorizationContext; 
            }
        }

        IList GetIdentities() 
        {
            object identities; 
            AuthorizationContext authContext = this.AuthorizationContext; 
            if (authContext != null && authContext.Properties.TryGetValue(SecurityUtils.Identities, out identities))
            { 
                return identities as IList;
            }
            return null;
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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ServiceSecurityContext.cs source code in C# .NET

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