Membership.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Security / Membership.cs / 1305376 / Membership.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Security { 
    using  System.Web; 
    using  System.Web.Configuration;
    using  System.Security.Principal; 
    using  System.Security.Permissions;
    using  System.Globalization;
    using  System.Runtime.Serialization;
    using  System.Collections; 
    using  System.Security.Cryptography;
    using  System.Configuration.Provider; 
    using  System.Text; 
    using  System.Configuration;
    using  System.Web.Management; 
    using  System.Web.Hosting;
    using  System.Threading;
    using  System.Web.Util;
    using  System.Collections.Specialized; 
    using System.Web.Compilation;
 
 
    /// 
    ///    [To be supplied.] 
    /// 
    // This has no hosting permission demands because of DevDiv Bugs 31461: ClientAppSvcs: ASP.net Provider support
    public static class Membership
    { 

        public static bool   EnablePasswordRetrieval   { get { Initialize(); return Provider.EnablePasswordRetrieval;}} 
 
        public static bool   EnablePasswordReset       { get { Initialize(); return Provider.EnablePasswordReset;}}
 
        public static bool   RequiresQuestionAndAnswer   { get { Initialize(); return Provider.RequiresQuestionAndAnswer;}}

        public static int    UserIsOnlineTimeWindow      { get { Initialize(); return s_UserIsOnlineTimeWindow; }}
 

        public static MembershipProviderCollection    Providers    { get { Initialize(); return s_Providers; }} 
 
        public static MembershipProvider Provider {
            get { 
                Initialize();
                if (s_Provider == null) {
                    throw new InvalidOperationException(SR.GetString(SR.Def_membership_provider_not_found));
                } 
                return s_Provider;
            } 
        } 

        public static string   HashAlgorithmType { get { Initialize(); return s_HashAlgorithmType; }} 
        internal static bool   IsHashAlgorithmFromMembershipConfig { get { Initialize(); return s_HashAlgorithmFromConfig; }}

        public static int MaxInvalidPasswordAttempts
        { 
            get
            { 
                Initialize(); 

                return Provider.MaxInvalidPasswordAttempts; 
            }
        }

        public static int PasswordAttemptWindow 
        {
            get 
            { 
                Initialize();
 
                return Provider.PasswordAttemptWindow;
            }
        }
 
        public static int MinRequiredPasswordLength
        { 
            get 
            {
                Initialize(); 

                return Provider.MinRequiredPasswordLength;
            }
        } 

        public static int MinRequiredNonAlphanumericCharacters 
        { 
            get
            { 
                Initialize();

                return Provider.MinRequiredNonAlphanumericCharacters;
            } 
        }
 
        public static string PasswordStrengthRegularExpression 
        {
            get 
            {
                Initialize();

                return Provider.PasswordStrengthRegularExpression; 
            }
        } 
 

        public static string ApplicationName 
        {
            get { return Provider.ApplicationName; }
            set { Provider.ApplicationName = value; }
        } 

 
        public static MembershipUser CreateUser(string username, string password) 
        {
            return CreateUser(username, password, null); 
        }


        public static MembershipUser CreateUser(string username, string password, string email) 
        {
            MembershipCreateStatus status; 
            MembershipUser u = CreateUser(username, password, email,null,null,true, out status); 
            if (u == null)
                throw new MembershipCreateUserException(status); 
            return u;
        }

 
        public static MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, out MembershipCreateStatus status)
        { 
            return CreateUser(username, password, email, passwordQuestion, passwordAnswer, isApproved, null, out status); 
        }
 
        public static MembershipUser CreateUser( string username, string password,  string email, string passwordQuestion,string passwordAnswer,
                                                 bool   isApproved, object providerUserKey, out MembershipCreateStatus status )
        {
            if( !SecUtility.ValidateParameter(ref username,  true,  true, true, 0)) 
            {
                status = MembershipCreateStatus.InvalidUserName; 
                return null; 
            }
 
            if( !SecUtility.ValidatePasswordParameter(ref password, 0))
            {
                status = MembershipCreateStatus.InvalidPassword;
                return null; 
            }
 
 
            if( !SecUtility.ValidateParameter( ref email, false, false, false, 0))
            { 
                status = MembershipCreateStatus.InvalidEmail;
                return null;
            }
 
            if( !SecUtility.ValidateParameter(ref passwordQuestion, false, true, false, 0))
            { 
                status = MembershipCreateStatus.InvalidQuestion; 
                return null;
            } 

            if( !SecUtility.ValidateParameter(ref passwordAnswer, false, true, false, 0))
            {
                status = MembershipCreateStatus.InvalidAnswer; 
                return null;
            } 
 
            return Provider.CreateUser( username, password, email, passwordQuestion, passwordAnswer, isApproved, providerUserKey, out status);
        } 


        public static bool ValidateUser(string username, string password)
        { 
            return Provider.ValidateUser(username, password);
            /* 
            if (retVal) { 
                PerfCounters.IncrementCounter(AppPerfCounter.MEMBER_SUCCESS);
                WebBaseEvent.RaiseSystemEvent(null, WebEventCodes.AuditMembershipAuthenticationSuccess, username); 
            }
            else {
                PerfCounters.IncrementCounter(AppPerfCounter.MEMBER_FAIL);
                WebBaseEvent.RaiseSystemEvent(null, WebEventCodes.AuditMembershipAuthenticationFailure, username); 
            }
 
            return retVal; 
             */
        } 


        public static MembershipUser GetUser()
        { 
            return GetUser(GetCurrentUserName(), true);
        } 
 

        public static MembershipUser GetUser(bool userIsOnline) 
        {
            return GetUser(GetCurrentUserName(), userIsOnline);
        }
 

        public static MembershipUser GetUser(string username) 
        { 
            return GetUser(username, false);
        } 


        public static MembershipUser GetUser(string username, bool userIsOnline)
        { 
            SecUtility.CheckParameter( ref username, true, false, true, 0, "username" );
 
            return Provider.GetUser(username, userIsOnline); 
        }
 
        public static MembershipUser GetUser( object providerUserKey )
        {
            return GetUser( providerUserKey, false);
        } 

        public static MembershipUser GetUser( object providerUserKey, bool userIsOnline ) 
        { 
            if( providerUserKey == null )
            { 
                throw new ArgumentNullException( "providerUserKey" );
            }

 
            return Provider.GetUser( providerUserKey, userIsOnline);
        } 
 

        public static string GetUserNameByEmail( string emailToMatch ) 
        {
            SecUtility.CheckParameter( ref emailToMatch,
                                       false,
                                       false, 
                                       false,
                                       0, 
                                       "emailToMatch" ); 

            return Provider.GetUserNameByEmail( emailToMatch ); 
        }


        public static bool DeleteUser(string username) 
        {
            SecUtility.CheckParameter( ref username, true, true, true, 0, "username" ); 
            return Provider.DeleteUser( username, true ); 
        }
 

        public static bool DeleteUser(string username, bool deleteAllRelatedData)
        {
            SecUtility.CheckParameter( ref username, true, true, true, 0, "username" ); 
            return Provider.DeleteUser( username, deleteAllRelatedData );
        } 
 

        public static void UpdateUser( MembershipUser user ) 
        {
            if( user == null )
            {
                throw new ArgumentNullException( "user" ); 
            }
 
            user.Update(); 
        }
 

        public static MembershipUserCollection GetAllUsers()
        {
            int totalRecords = 0; 
            return GetAllUsers( 0, Int32.MaxValue, out totalRecords);
        } 
 
        public static MembershipUserCollection GetAllUsers(int pageIndex, int pageSize, out int totalRecords)
        { 
            if ( pageIndex < 0 )
            {
                throw new ArgumentException(SR.GetString(SR.PageIndex_bad), "pageIndex");
            } 

            if ( pageSize < 1 ) 
            { 
                throw new ArgumentException(SR.GetString(SR.PageSize_bad), "pageSize");
            } 

            return Provider.GetAllUsers(pageIndex, pageSize, out totalRecords);
        }
 

        public static int GetNumberOfUsersOnline() { 
            return Provider.GetNumberOfUsersOnline(); 
        }
 
        private static char [] punctuations = "!@#$%^&*()_-+=[{]};:>|./?".ToCharArray();


        public static string GeneratePassword(int length, int numberOfNonAlphanumericCharacters) { 
            if (length < 1 || length > 128)
            { 
                throw new ArgumentException(SR.GetString(SR.Membership_password_length_incorrect)); 
            }
 
            if( numberOfNonAlphanumericCharacters > length || numberOfNonAlphanumericCharacters < 0 )
            {
                throw new ArgumentException(SR.GetString(SR.Membership_min_required_non_alphanumeric_characters_incorrect,
                                                         "numberOfNonAlphanumericCharacters")); 
            }
 
            string password; 
            int    index;
            byte[] buf; 
            char[] cBuf;
            int count;

            do { 
                buf = new byte[length];
                cBuf = new char[length]; 
                count = 0; 

                (new RNGCryptoServiceProvider()).GetBytes(buf); 

                for(int iter=0; iter".
                // If the validation is "3DES", switch it to use "SHA1" instead.
                MachineKeyValidation v = appConfig.MachineKey.Validation; 
                if (v != MachineKeyValidation.AES && v != MachineKeyValidation.TripleDES)
                    s_HashAlgorithmType = appConfig.MachineKey.ValidationAlgorithm; 
                else 
                    s_HashAlgorithmType = "SHA1";
            } 
            s_Providers = new MembershipProviderCollection();
            if (HostingEnvironment.IsHosted) {
                ProvidersHelper.InstantiateProviders(settings.Providers, s_Providers, typeof(MembershipProvider));
            } else { 
                foreach (ProviderSettings ps in settings.Providers) {
                    Type t = Type.GetType(ps.Type, true, true); 
                    if (!typeof(MembershipProvider).IsAssignableFrom(t)) 
                        throw new ArgumentException(SR.GetString(SR.Provider_must_implement_type, typeof(MembershipProvider).ToString()));
                    MembershipProvider provider = (MembershipProvider)Activator.CreateInstance(t); 
                    NameValueCollection pars = ps.Parameters;
                    NameValueCollection cloneParams = new NameValueCollection(pars.Count, StringComparer.Ordinal);
                    foreach (string key in pars)
                        cloneParams[key] = pars[key]; 
                    provider.Initialize(ps.Name, cloneParams);
                    s_Providers.Add(provider); 
                } 
            }
 
            TimeSpan timeWindow = settings.UserIsOnlineTimeWindow;
            s_UserIsOnlineTimeWindow = (int)timeWindow.TotalMinutes;

            return true; 
        }
 
        private static bool InitializeDefaultProvider(bool initializeDefaultProvider, MembershipSection settings) { 
            if (!initializeDefaultProvider) {
                return false; 
            }

            s_Providers.SetReadOnly();
 
            if (settings.DefaultProvider == null || s_Providers.Count < 1)
                throw new ProviderException(SR.GetString(SR.Def_membership_provider_not_specified)); 
 
            s_Provider = s_Providers[settings.DefaultProvider];
            if (s_Provider == null) { 
                throw new ConfigurationErrorsException(SR.GetString(SR.Def_membership_provider_not_found), settings.ElementInformation.Properties["defaultProvider"].Source, settings.ElementInformation.Properties["defaultProvider"].LineNumber);
            }

            return true; 
        }
 
        public static MembershipUserCollection FindUsersByName( string usernameToMatch, 
                                                                int pageIndex,
                                                                int pageSize, 
                                                                out int totalRecords )
        {
            SecUtility.CheckParameter( ref usernameToMatch,
                                       true, 
                                       true,
                                       false, 
                                       0, 
                                       "usernameToMatch" );
 
            if ( pageIndex < 0 )
            {
                throw new ArgumentException(SR.GetString(SR.PageIndex_bad), "pageIndex");
            } 

            if ( pageSize < 1 ) 
            { 
                throw new ArgumentException(SR.GetString(SR.PageSize_bad), "pageSize");
            } 

            return Provider.FindUsersByName( usernameToMatch,
                                             pageIndex,
                                             pageSize, 
                                             out totalRecords);
        } 
 

        public static MembershipUserCollection FindUsersByName( string usernameToMatch ) 
        {
            SecUtility.CheckParameter( ref usernameToMatch,
                                       true,
                                       true, 
                                       false,
                                       0, 
                                       "usernameToMatch" ); 

            int totalRecords = 0; 
            return Provider.FindUsersByName( usernameToMatch,
                                             0,
                                             Int32.MaxValue,
                                             out totalRecords ); 
        }
 
        public static MembershipUserCollection FindUsersByEmail( string  emailToMatch, 
                                                                 int     pageIndex,
                                                                 int     pageSize, 
                                                                 out int totalRecords )
        {
            SecUtility.CheckParameter( ref emailToMatch,
                                       false, 
                                       false,
                                       false, 
                                       0, 
                                       "emailToMatch" );
 
            if ( pageIndex < 0 )
            {
                throw new ArgumentException(SR.GetString(SR.PageIndex_bad), "pageIndex");
            } 

            if ( pageSize < 1 ) 
            { 
                throw new ArgumentException(SR.GetString(SR.PageSize_bad), "pageSize");
            } 

            return Provider.FindUsersByEmail( emailToMatch,
                                              pageIndex,
                                              pageSize, 
                                              out totalRecords );
        } 
 
        public static MembershipUserCollection FindUsersByEmail(string emailToMatch)
        { 
            SecUtility.CheckParameter( ref emailToMatch,
                                       false,
                                       false,
                                       false, 
                                       0,
                                       "emailToMatch" ); 
 
            int totalRecords = 0;
            return FindUsersByEmail(emailToMatch, 0, Int32.MaxValue, out totalRecords); 
        }

        private static string GetCurrentUserName()
        { 
            if (HostingEnvironment.IsHosted) {
                HttpContext cur = HttpContext.Current; 
                if (cur != null) 
                    return cur.User.Identity.Name;
            } 
            IPrincipal user = Thread.CurrentPrincipal;
            if (user == null || user.Identity == null)
                return String.Empty;
            else 
                return user.Identity.Name;
        } 
 
        public static event MembershipValidatePasswordEventHandler ValidatingPassword
        { 
            add
            {
                Provider.ValidatingPassword += value;
            } 
            remove
            { 
                Provider.ValidatingPassword -= value; 
            }
        } 

        private static MembershipProviderCollection   s_Providers;
        private static MembershipProvider             s_Provider;
        private static int                            s_UserIsOnlineTimeWindow = 15; 
        private static object                         s_lock = new object();
        private static bool                           s_Initialized = false; 
        private static bool                           s_InitializedDefaultProvider; 
        private static Exception                      s_InitializeException = null;
        private static string                         s_HashAlgorithmType; 
        private static bool                           s_HashAlgorithmFromConfig;

    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Security { 
    using  System.Web; 
    using  System.Web.Configuration;
    using  System.Security.Principal; 
    using  System.Security.Permissions;
    using  System.Globalization;
    using  System.Runtime.Serialization;
    using  System.Collections; 
    using  System.Security.Cryptography;
    using  System.Configuration.Provider; 
    using  System.Text; 
    using  System.Configuration;
    using  System.Web.Management; 
    using  System.Web.Hosting;
    using  System.Threading;
    using  System.Web.Util;
    using  System.Collections.Specialized; 
    using System.Web.Compilation;
 
 
    /// 
    ///    [To be supplied.] 
    /// 
    // This has no hosting permission demands because of DevDiv Bugs 31461: ClientAppSvcs: ASP.net Provider support
    public static class Membership
    { 

        public static bool   EnablePasswordRetrieval   { get { Initialize(); return Provider.EnablePasswordRetrieval;}} 
 
        public static bool   EnablePasswordReset       { get { Initialize(); return Provider.EnablePasswordReset;}}
 
        public static bool   RequiresQuestionAndAnswer   { get { Initialize(); return Provider.RequiresQuestionAndAnswer;}}

        public static int    UserIsOnlineTimeWindow      { get { Initialize(); return s_UserIsOnlineTimeWindow; }}
 

        public static MembershipProviderCollection    Providers    { get { Initialize(); return s_Providers; }} 
 
        public static MembershipProvider Provider {
            get { 
                Initialize();
                if (s_Provider == null) {
                    throw new InvalidOperationException(SR.GetString(SR.Def_membership_provider_not_found));
                } 
                return s_Provider;
            } 
        } 

        public static string   HashAlgorithmType { get { Initialize(); return s_HashAlgorithmType; }} 
        internal static bool   IsHashAlgorithmFromMembershipConfig { get { Initialize(); return s_HashAlgorithmFromConfig; }}

        public static int MaxInvalidPasswordAttempts
        { 
            get
            { 
                Initialize(); 

                return Provider.MaxInvalidPasswordAttempts; 
            }
        }

        public static int PasswordAttemptWindow 
        {
            get 
            { 
                Initialize();
 
                return Provider.PasswordAttemptWindow;
            }
        }
 
        public static int MinRequiredPasswordLength
        { 
            get 
            {
                Initialize(); 

                return Provider.MinRequiredPasswordLength;
            }
        } 

        public static int MinRequiredNonAlphanumericCharacters 
        { 
            get
            { 
                Initialize();

                return Provider.MinRequiredNonAlphanumericCharacters;
            } 
        }
 
        public static string PasswordStrengthRegularExpression 
        {
            get 
            {
                Initialize();

                return Provider.PasswordStrengthRegularExpression; 
            }
        } 
 

        public static string ApplicationName 
        {
            get { return Provider.ApplicationName; }
            set { Provider.ApplicationName = value; }
        } 

 
        public static MembershipUser CreateUser(string username, string password) 
        {
            return CreateUser(username, password, null); 
        }


        public static MembershipUser CreateUser(string username, string password, string email) 
        {
            MembershipCreateStatus status; 
            MembershipUser u = CreateUser(username, password, email,null,null,true, out status); 
            if (u == null)
                throw new MembershipCreateUserException(status); 
            return u;
        }

 
        public static MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, out MembershipCreateStatus status)
        { 
            return CreateUser(username, password, email, passwordQuestion, passwordAnswer, isApproved, null, out status); 
        }
 
        public static MembershipUser CreateUser( string username, string password,  string email, string passwordQuestion,string passwordAnswer,
                                                 bool   isApproved, object providerUserKey, out MembershipCreateStatus status )
        {
            if( !SecUtility.ValidateParameter(ref username,  true,  true, true, 0)) 
            {
                status = MembershipCreateStatus.InvalidUserName; 
                return null; 
            }
 
            if( !SecUtility.ValidatePasswordParameter(ref password, 0))
            {
                status = MembershipCreateStatus.InvalidPassword;
                return null; 
            }
 
 
            if( !SecUtility.ValidateParameter( ref email, false, false, false, 0))
            { 
                status = MembershipCreateStatus.InvalidEmail;
                return null;
            }
 
            if( !SecUtility.ValidateParameter(ref passwordQuestion, false, true, false, 0))
            { 
                status = MembershipCreateStatus.InvalidQuestion; 
                return null;
            } 

            if( !SecUtility.ValidateParameter(ref passwordAnswer, false, true, false, 0))
            {
                status = MembershipCreateStatus.InvalidAnswer; 
                return null;
            } 
 
            return Provider.CreateUser( username, password, email, passwordQuestion, passwordAnswer, isApproved, providerUserKey, out status);
        } 


        public static bool ValidateUser(string username, string password)
        { 
            return Provider.ValidateUser(username, password);
            /* 
            if (retVal) { 
                PerfCounters.IncrementCounter(AppPerfCounter.MEMBER_SUCCESS);
                WebBaseEvent.RaiseSystemEvent(null, WebEventCodes.AuditMembershipAuthenticationSuccess, username); 
            }
            else {
                PerfCounters.IncrementCounter(AppPerfCounter.MEMBER_FAIL);
                WebBaseEvent.RaiseSystemEvent(null, WebEventCodes.AuditMembershipAuthenticationFailure, username); 
            }
 
            return retVal; 
             */
        } 


        public static MembershipUser GetUser()
        { 
            return GetUser(GetCurrentUserName(), true);
        } 
 

        public static MembershipUser GetUser(bool userIsOnline) 
        {
            return GetUser(GetCurrentUserName(), userIsOnline);
        }
 

        public static MembershipUser GetUser(string username) 
        { 
            return GetUser(username, false);
        } 


        public static MembershipUser GetUser(string username, bool userIsOnline)
        { 
            SecUtility.CheckParameter( ref username, true, false, true, 0, "username" );
 
            return Provider.GetUser(username, userIsOnline); 
        }
 
        public static MembershipUser GetUser( object providerUserKey )
        {
            return GetUser( providerUserKey, false);
        } 

        public static MembershipUser GetUser( object providerUserKey, bool userIsOnline ) 
        { 
            if( providerUserKey == null )
            { 
                throw new ArgumentNullException( "providerUserKey" );
            }

 
            return Provider.GetUser( providerUserKey, userIsOnline);
        } 
 

        public static string GetUserNameByEmail( string emailToMatch ) 
        {
            SecUtility.CheckParameter( ref emailToMatch,
                                       false,
                                       false, 
                                       false,
                                       0, 
                                       "emailToMatch" ); 

            return Provider.GetUserNameByEmail( emailToMatch ); 
        }


        public static bool DeleteUser(string username) 
        {
            SecUtility.CheckParameter( ref username, true, true, true, 0, "username" ); 
            return Provider.DeleteUser( username, true ); 
        }
 

        public static bool DeleteUser(string username, bool deleteAllRelatedData)
        {
            SecUtility.CheckParameter( ref username, true, true, true, 0, "username" ); 
            return Provider.DeleteUser( username, deleteAllRelatedData );
        } 
 

        public static void UpdateUser( MembershipUser user ) 
        {
            if( user == null )
            {
                throw new ArgumentNullException( "user" ); 
            }
 
            user.Update(); 
        }
 

        public static MembershipUserCollection GetAllUsers()
        {
            int totalRecords = 0; 
            return GetAllUsers( 0, Int32.MaxValue, out totalRecords);
        } 
 
        public static MembershipUserCollection GetAllUsers(int pageIndex, int pageSize, out int totalRecords)
        { 
            if ( pageIndex < 0 )
            {
                throw new ArgumentException(SR.GetString(SR.PageIndex_bad), "pageIndex");
            } 

            if ( pageSize < 1 ) 
            { 
                throw new ArgumentException(SR.GetString(SR.PageSize_bad), "pageSize");
            } 

            return Provider.GetAllUsers(pageIndex, pageSize, out totalRecords);
        }
 

        public static int GetNumberOfUsersOnline() { 
            return Provider.GetNumberOfUsersOnline(); 
        }
 
        private static char [] punctuations = "!@#$%^&*()_-+=[{]};:>|./?".ToCharArray();


        public static string GeneratePassword(int length, int numberOfNonAlphanumericCharacters) { 
            if (length < 1 || length > 128)
            { 
                throw new ArgumentException(SR.GetString(SR.Membership_password_length_incorrect)); 
            }
 
            if( numberOfNonAlphanumericCharacters > length || numberOfNonAlphanumericCharacters < 0 )
            {
                throw new ArgumentException(SR.GetString(SR.Membership_min_required_non_alphanumeric_characters_incorrect,
                                                         "numberOfNonAlphanumericCharacters")); 
            }
 
            string password; 
            int    index;
            byte[] buf; 
            char[] cBuf;
            int count;

            do { 
                buf = new byte[length];
                cBuf = new char[length]; 
                count = 0; 

                (new RNGCryptoServiceProvider()).GetBytes(buf); 

                for(int iter=0; iter".
                // If the validation is "3DES", switch it to use "SHA1" instead.
                MachineKeyValidation v = appConfig.MachineKey.Validation; 
                if (v != MachineKeyValidation.AES && v != MachineKeyValidation.TripleDES)
                    s_HashAlgorithmType = appConfig.MachineKey.ValidationAlgorithm; 
                else 
                    s_HashAlgorithmType = "SHA1";
            } 
            s_Providers = new MembershipProviderCollection();
            if (HostingEnvironment.IsHosted) {
                ProvidersHelper.InstantiateProviders(settings.Providers, s_Providers, typeof(MembershipProvider));
            } else { 
                foreach (ProviderSettings ps in settings.Providers) {
                    Type t = Type.GetType(ps.Type, true, true); 
                    if (!typeof(MembershipProvider).IsAssignableFrom(t)) 
                        throw new ArgumentException(SR.GetString(SR.Provider_must_implement_type, typeof(MembershipProvider).ToString()));
                    MembershipProvider provider = (MembershipProvider)Activator.CreateInstance(t); 
                    NameValueCollection pars = ps.Parameters;
                    NameValueCollection cloneParams = new NameValueCollection(pars.Count, StringComparer.Ordinal);
                    foreach (string key in pars)
                        cloneParams[key] = pars[key]; 
                    provider.Initialize(ps.Name, cloneParams);
                    s_Providers.Add(provider); 
                } 
            }
 
            TimeSpan timeWindow = settings.UserIsOnlineTimeWindow;
            s_UserIsOnlineTimeWindow = (int)timeWindow.TotalMinutes;

            return true; 
        }
 
        private static bool InitializeDefaultProvider(bool initializeDefaultProvider, MembershipSection settings) { 
            if (!initializeDefaultProvider) {
                return false; 
            }

            s_Providers.SetReadOnly();
 
            if (settings.DefaultProvider == null || s_Providers.Count < 1)
                throw new ProviderException(SR.GetString(SR.Def_membership_provider_not_specified)); 
 
            s_Provider = s_Providers[settings.DefaultProvider];
            if (s_Provider == null) { 
                throw new ConfigurationErrorsException(SR.GetString(SR.Def_membership_provider_not_found), settings.ElementInformation.Properties["defaultProvider"].Source, settings.ElementInformation.Properties["defaultProvider"].LineNumber);
            }

            return true; 
        }
 
        public static MembershipUserCollection FindUsersByName( string usernameToMatch, 
                                                                int pageIndex,
                                                                int pageSize, 
                                                                out int totalRecords )
        {
            SecUtility.CheckParameter( ref usernameToMatch,
                                       true, 
                                       true,
                                       false, 
                                       0, 
                                       "usernameToMatch" );
 
            if ( pageIndex < 0 )
            {
                throw new ArgumentException(SR.GetString(SR.PageIndex_bad), "pageIndex");
            } 

            if ( pageSize < 1 ) 
            { 
                throw new ArgumentException(SR.GetString(SR.PageSize_bad), "pageSize");
            } 

            return Provider.FindUsersByName( usernameToMatch,
                                             pageIndex,
                                             pageSize, 
                                             out totalRecords);
        } 
 

        public static MembershipUserCollection FindUsersByName( string usernameToMatch ) 
        {
            SecUtility.CheckParameter( ref usernameToMatch,
                                       true,
                                       true, 
                                       false,
                                       0, 
                                       "usernameToMatch" ); 

            int totalRecords = 0; 
            return Provider.FindUsersByName( usernameToMatch,
                                             0,
                                             Int32.MaxValue,
                                             out totalRecords ); 
        }
 
        public static MembershipUserCollection FindUsersByEmail( string  emailToMatch, 
                                                                 int     pageIndex,
                                                                 int     pageSize, 
                                                                 out int totalRecords )
        {
            SecUtility.CheckParameter( ref emailToMatch,
                                       false, 
                                       false,
                                       false, 
                                       0, 
                                       "emailToMatch" );
 
            if ( pageIndex < 0 )
            {
                throw new ArgumentException(SR.GetString(SR.PageIndex_bad), "pageIndex");
            } 

            if ( pageSize < 1 ) 
            { 
                throw new ArgumentException(SR.GetString(SR.PageSize_bad), "pageSize");
            } 

            return Provider.FindUsersByEmail( emailToMatch,
                                              pageIndex,
                                              pageSize, 
                                              out totalRecords );
        } 
 
        public static MembershipUserCollection FindUsersByEmail(string emailToMatch)
        { 
            SecUtility.CheckParameter( ref emailToMatch,
                                       false,
                                       false,
                                       false, 
                                       0,
                                       "emailToMatch" ); 
 
            int totalRecords = 0;
            return FindUsersByEmail(emailToMatch, 0, Int32.MaxValue, out totalRecords); 
        }

        private static string GetCurrentUserName()
        { 
            if (HostingEnvironment.IsHosted) {
                HttpContext cur = HttpContext.Current; 
                if (cur != null) 
                    return cur.User.Identity.Name;
            } 
            IPrincipal user = Thread.CurrentPrincipal;
            if (user == null || user.Identity == null)
                return String.Empty;
            else 
                return user.Identity.Name;
        } 
 
        public static event MembershipValidatePasswordEventHandler ValidatingPassword
        { 
            add
            {
                Provider.ValidatingPassword += value;
            } 
            remove
            { 
                Provider.ValidatingPassword -= value; 
            }
        } 

        private static MembershipProviderCollection   s_Providers;
        private static MembershipProvider             s_Provider;
        private static int                            s_UserIsOnlineTimeWindow = 15; 
        private static object                         s_lock = new object();
        private static bool                           s_Initialized = false; 
        private static bool                           s_InitializedDefaultProvider; 
        private static Exception                      s_InitializeException = null;
        private static string                         s_HashAlgorithmType; 
        private static bool                           s_HashAlgorithmFromConfig;

    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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