AuthenticationService.cs source code in C# .NET

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                         / DotNET / DotNET / 8.0 / untmp / Orcas / RTM / ndp / fx / src / xsp / System / Web / Extensions / ApplicationServices / AuthenticationService.cs / 1 / AuthenticationService.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.ApplicationServices { 
    using System; 
    using System.Diagnostics.CodeAnalysis;
    using System.Security.Permissions; 
    using System.ServiceModel;
    using System.ServiceModel.Activation;
    using System.Web;
    using System.Web.Management; 
    using System.Web.Resources;
    using System.Web.Security; 
 
    /// 
    ///     Implements login service contract to be exposed as a WCF service. Uses Membership provider 
    ///     or custom authentication login in the Authenticating event. Also uses Forms.SetAuthCookie() or
    ///     custom cookie generation via the CreatingCookie event.
    /// 
 
    [
    AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required), 
    AspNetHostingPermission(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal), 
    AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal),
    ServiceContract(Namespace="http://asp.net/ApplicationServices/v200"), 
    ServiceBehavior(Namespace="http://asp.net/ApplicationServices/v200", InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)
    ]
    public class AuthenticationService {
 
        /// 
        ///    Raised to authenticate the user . The event handler sets the e.AuthenticationIsComplete flag to true 
        ///    and e.Authenticated to the result. 
        /// 
        private static object _authenticatingEventHandlerLock = new object(); 
        private static EventHandler _authenticating;
        public static event EventHandler Authenticating {
            add {
                lock (_authenticatingEventHandlerLock) { 
                    _authenticating += value;
                } 
            } 
            remove {
                lock (_authenticatingEventHandlerLock) { 
                    _authenticating -= value;
                }
            }
        } 

        ///  
        ///    Raised to create and set the cookie. The event handler shouldset the e.CookieIsSet flag to true, if it is 
        ///    setting the cookie.
        ///  
        private static object _creatingCookieEventHandlerLock = new object();
        private static EventHandler _creatingCookie;
        public static event EventHandler CreatingCookie {
            add { 
                lock (_creatingCookieEventHandlerLock) {
                    _creatingCookie += value; 
                } 
            }
            remove { 
                lock (_creatingCookieEventHandlerLock) {
                    _creatingCookie -= value;
                }
            } 
        }
 
        //hiding constructors 
        internal AuthenticationService() {
        } 

        /// 
        ///    Raises the AuthentincatingEvent if atleast one handler is assigned.
        ///  
        private void OnAuthenticating(AuthenticatingEventArgs e) {
            EventHandler handler = _authenticating; 
            if (null != handler) { 
                handler(this, e);
            } 
        }

        /// 
        ///     Raises the CreatingCookieEvent if atleast one handler is assigned. 
        /// 
        private void OnCreatingCookie(CreatingCookieEventArgs e) { 
            EventHandler handler = _creatingCookie; 
            if (null != handler) {
                handler(this, e); 
            }
        }

        ///  
        ///     Validates user credentials,without actually setting the FormAuth cookie
        ///  
        /// Username of the account 
        /// Password of the account
        /// Any misc. string to be used by custom authentication logic 
        /// True, if credentials are valid, otherwise false
        [OperationContract]
        [SuppressMessage("Microsoft.Naming", "CA1702:CompoundWordsShouldBeCasedCorrectly", MessageId="username", Justification="consistent with Whidbey")]
        public bool ValidateUser(string username, string password, string customCredential) { 
            ApplicationServiceHelper.EnsureAuthenticationServiceEnabled(HttpContext.Current, true);
            return LoginInternal(username, password, customCredential, false, false); 
        } 

        ///  
        ///     Validates user credentials,and sets the FormAuth cookie if the credentials are valid.
        /// 
        /// Username of the account
        /// Password of the account 
        /// Any misc. string to be used by custom authentication logic
        /// If true the persistant cookie is generated.  
        /// True, if credentials are valid, otherwise false 
        [OperationContract]
        [SuppressMessage("Microsoft.Naming", "CA1702:CompoundWordsShouldBeCasedCorrectly", MessageId="username", Justification="consistent with Whidbey")] 
        public bool Login(string username, string password, string customCredential, bool isPersistent) {
            ApplicationServiceHelper.EnsureAuthenticationServiceEnabled(HttpContext.Current, true);
            return LoginInternal(username, password, customCredential, isPersistent, true);
        } 

        ///  
        ///    Checks whether the Forms Authentication cookie attached to the request is valid. 
        /// 
        [OperationContract] 
        public bool IsLoggedIn() {
            ApplicationServiceHelper.EnsureAuthenticationServiceEnabled(HttpContext.Current, true);
            return HttpContext.Current.User.Identity.IsAuthenticated;
        } 

        ///  
        ///   Clears the Forms Authentication cookie 
        /// 
        [OperationContract] 
        public void Logout() {
            ApplicationServiceHelper.EnsureAuthenticationServiceEnabled(HttpContext.Current, false);
            FormsAuthentication.SignOut();
        } 

        ///  
        ///     Validates the user credentials. 
        /// 
        ///  
        /// 
        /// 
        /// 
        /// If this is true, CreatingCookie event is raised, and cookie is set in HttpResponse 
        /// 
        private bool LoginInternal(string username, string password, string customCredential, bool isPersistent, bool setCookie) { 
            if (null == username) { 
                throw new ArgumentNullException("username");
            } 

            if (null == password) {
                throw new ArgumentNullException("password");
            } 
            AuthenticatingEventArgs authEventArgs = new AuthenticatingEventArgs(username, password, customCredential);
            try { 
                OnAuthenticating(authEventArgs); 

                if (!authEventArgs.AuthenticationIsComplete) { 
                    MembershipValidate(authEventArgs);
                }
                if (!authEventArgs.Authenticated) {
                    Logout(); 
                }
                if (authEventArgs.Authenticated && setCookie) { 
                    CreatingCookieEventArgs cookieEventArgs = new CreatingCookieEventArgs(username, password, isPersistent, customCredential); 
                    OnCreatingCookie(cookieEventArgs);
                    if (!cookieEventArgs.CookieIsSet) { 
                        SetCookie(username, isPersistent);
                    }
                }
            } 
            catch (Exception e) {
                LogException(e); 
                throw; 
            }
            return authEventArgs.Authenticated; 
        }


        private static void MembershipValidate(AuthenticatingEventArgs e) { 
            e.Authenticated = Membership.ValidateUser(e.UserName, e.Password);
        } 
 
        private static void SetCookie(string username, bool isPersistent) {
            FormsAuthentication.SetAuthCookie(username, isPersistent); 
        }

        private void LogException(Exception e) {
            WebServiceErrorEvent errorevent = new WebServiceErrorEvent(AtlasWeb.UnhandledExceptionEventLogMessage, this, e); 
            errorevent.Raise();
        } 
 
    }
} 

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

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