private static bool BuildEAS25And120Provisions(StringBuilder xml, int deviceVersion, IPolicyData mailboxPolicy)
        {
            bool flag = true;
            bool allowNonProvisionableDevices = mailboxPolicy.AllowNonProvisionableDevices;

            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "DevicePasswordEnabled", mailboxPolicy.DevicePasswordEnabled, allowNonProvisionableDevices, deviceVersion, 20, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AlphanumericDevicePasswordRequired", mailboxPolicy.AlphanumericDevicePasswordRequired, allowNonProvisionableDevices, deviceVersion, 20, false);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "PasswordRecoveryEnabled", mailboxPolicy.PasswordRecoveryEnabled, allowNonProvisionableDevices, deviceVersion, 20, false);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "RequireStorageCardEncryption", mailboxPolicy.RequireStorageCardEncryption, allowNonProvisionableDevices, deviceVersion, 20, false);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AttachmentsEnabled", mailboxPolicy.AttachmentsEnabled, allowNonProvisionableDevices, deviceVersion, 20, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MinDevicePasswordLength", mailboxPolicy.MinDevicePasswordLength, allowNonProvisionableDevices, deviceVersion, 20, 0);
            object value = null;

            if (!mailboxPolicy.MaxInactivityTimeDeviceLock.IsUnlimited)
            {
                value = (int)mailboxPolicy.MaxInactivityTimeDeviceLock.Value.TotalSeconds;
            }
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxInactivityTimeDeviceLock", value, allowNonProvisionableDevices, deviceVersion, 20, null);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxDevicePasswordFailedAttempts", mailboxPolicy.MaxDevicePasswordFailedAttempts, allowNonProvisionableDevices, deviceVersion, 20, null);
            value = null;
            if (!mailboxPolicy.MaxAttachmentSize.IsUnlimited)
            {
                value = mailboxPolicy.MaxAttachmentSize.Value.ToBytes();
            }
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxAttachmentSize", value, allowNonProvisionableDevices, deviceVersion, 20, null);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowSimpleDevicePassword", mailboxPolicy.AllowSimpleDevicePassword, allowNonProvisionableDevices, deviceVersion, 20, true);
            value = null;
            if (!mailboxPolicy.DevicePasswordExpiration.IsUnlimited)
            {
                value = (int)mailboxPolicy.DevicePasswordExpiration.Value.TotalDays;
            }
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "DevicePasswordExpiration", value, allowNonProvisionableDevices, deviceVersion, 20, null);
            return(flag & ProvisionCommandPhaseOne.AppendEASAttribute(xml, "DevicePasswordHistory", mailboxPolicy.DevicePasswordHistory, allowNonProvisionableDevices, deviceVersion, 20, 0));
        }
示例#2
0
        internal override Command.ExecutionState ExecuteCommand()
        {
            base.XmlResponse = base.GetCommandXmlStub();
            XmlNode provisionResponseNode = base.XmlResponse[this.RootNodeName];

            switch (ProvisionCommandPhaseBase.DetermineCallPhase(base.XmlRequest))
            {
            case ProvisionCommandPhaseBase.ProvisionPhase.PhaseOne:
            {
                ProvisionCommandPhaseOne provisionCommandPhaseOne = new ProvisionCommandPhaseOne(this);
                provisionCommandPhaseOne.Process(provisionResponseNode);
                break;
            }

            case ProvisionCommandPhaseBase.ProvisionPhase.PhaseTwo:
            {
                ProvisionCommandPhaseTwo provisionCommandPhaseTwo = new ProvisionCommandPhaseTwo(this);
                provisionCommandPhaseTwo.Process(provisionResponseNode);
                break;
            }

            default:
                throw new AirSyncPermanentException(StatusCode.Sync_ProtocolVersionMismatch, false)
                      {
                          ErrorStringForProtocolLogger = "Provision_InvalidCallType"
                      };
            }
            return(Command.ExecutionState.Complete);
        }
        // Token: 0x06000DF7 RID: 3575 RVA: 0x0004DFAC File Offset: 0x0004C1AC
        public PolicyData(MobileMailboxPolicy policy, bool useIrmEnabledPolicySetting)
        {
            this.identity = policy.OriginalId;
            this.allowNonProvisionableDevices       = policy.AllowNonProvisionableDevices;
            this.alphanumericDevicePasswordRequired = policy.AlphanumericPasswordRequired;
            this.attachmentsEnabled              = policy.AttachmentsEnabled;
            this.requireStorageCardEncryption    = policy.RequireStorageCardEncryption;
            this.devicePasswordEnabled           = policy.PasswordEnabled;
            this.passwordRecoveryEnabled         = policy.PasswordRecoveryEnabled;
            this.devicePolicyRefreshInterval     = policy.DevicePolicyRefreshInterval;
            this.allowSimpleDevicePassword       = policy.AllowSimplePassword;
            this.maxAttachmentSize               = policy.MaxAttachmentSize;
            this.wssAccessEnabled                = policy.WSSAccessEnabled;
            this.uncAccessEnabled                = policy.UNCAccessEnabled;
            this.minDevicePasswordLength         = policy.MinPasswordLength;
            this.maxInactivityTimeDeviceLock     = policy.MaxInactivityTimeLock;
            this.maxDevicePasswordFailedAttempts = policy.MaxPasswordFailedAttempts;
            this.devicePasswordExpiration        = policy.PasswordExpiration;
            this.devicePasswordHistory           = policy.PasswordHistory;
            this.isDefault                                = policy.IsDefault;
            this.allowStorageCard                         = policy.AllowStorageCard;
            this.allowCamera                              = policy.AllowCamera;
            this.requireDeviceEncryption                  = policy.RequireDeviceEncryption;
            this.allowUnsignedApplications                = policy.AllowUnsignedApplications;
            this.allowUnsignedInstallationPackages        = policy.AllowUnsignedInstallationPackages;
            this.allowWiFi                                = policy.AllowWiFi;
            this.allowTextMessaging                       = policy.AllowTextMessaging;
            this.allowPOPIMAPEmail                        = policy.AllowPOPIMAPEmail;
            this.allowIrDA                                = policy.AllowIrDA;
            this.requireManualSyncWhenRoaming             = policy.RequireManualSyncWhenRoaming;
            this.allowDesktopSync                         = policy.AllowDesktopSync;
            this.allowHTMLEmail                           = policy.AllowHTMLEmail;
            this.requireSignedSMIMEMessages               = policy.RequireSignedSMIMEMessages;
            this.requireEncryptedSMIMEMessages            = policy.RequireEncryptedSMIMEMessages;
            this.allowSMIMESoftCerts                      = policy.AllowSMIMESoftCerts;
            this.allowBrowser                             = policy.AllowBrowser;
            this.allowConsumerEmail                       = policy.AllowConsumerEmail;
            this.allowRemoteDesktop                       = policy.AllowRemoteDesktop;
            this.allowInternetSharing                     = policy.AllowInternetSharing;
            this.allowBluetooth                           = policy.AllowBluetooth;
            this.maxCalendarAgeFilter                     = policy.MaxCalendarAgeFilter;
            this.maxEmailAgeFilter                        = policy.MaxEmailAgeFilter;
            this.requireSignedSMIMEAlgorithm              = policy.RequireSignedSMIMEAlgorithm;
            this.requireEncryptionSMIMEAlgorithm          = policy.RequireEncryptionSMIMEAlgorithm;
            this.allowSMIMEEncryptionAlgorithmNegotiation = policy.AllowSMIMEEncryptionAlgorithmNegotiation;
            this.minDevicePasswordComplexCharacters       = policy.MinPasswordComplexCharacters;
            this.maxEmailBodyTruncationSize               = policy.MaxEmailBodyTruncationSize;
            this.maxEmailHTMLBodyTruncationSize           = policy.MaxEmailHTMLBodyTruncationSize;
            this.unapprovedInROMApplicationList           = policy.UnapprovedInROMApplicationList;
            this.approvedApplicationList                  = policy.ApprovedApplicationList;
            this.allowExternalDeviceManagement            = policy.AllowExternalDeviceManagement;
            this.MobileOTAUpdateMode                      = policy.MobileOTAUpdateMode;
            this.AllowMobileOTAUpdate                     = policy.AllowMobileOTAUpdate;
            this.isIrmEnabled                             = (useIrmEnabledPolicySetting && policy.IrmEnabled);
            string policyXml = ProvisionCommandPhaseOne.BuildEASProvisionDoc(20, out this.preversion121DeviceCompatibility, this) + policy.AllowNonProvisionableDevices;

            this.preversion121HashCode = PolicyData.GetPolicyHashCode(policyXml);
            policyXml = ProvisionCommandPhaseOne.BuildEASProvisionDoc(121, out this.version121DeviceCompatibility, this) + policy.AllowNonProvisionableDevices;
            this.version121HashCode = PolicyData.GetPolicyHashCode(policyXml);
        }
 private static string BuildEASProvisionDoc(IPolicyData mailboxPolicy, int deviceVersion, out bool policyIsCompatibleWithDevice)
 {
     policyIsCompatibleWithDevice = true;
     if (mailboxPolicy == null)
     {
         return(null);
     }
     return(ProvisionCommandPhaseOne.BuildEASProvisionDoc(deviceVersion, out policyIsCompatibleWithDevice, mailboxPolicy));
 }
        internal static string BuildEASProvisionDoc(int deviceVersion, out bool policyIsCompatibleWithDevice, IPolicyData mailboxPolicy)
        {
            policyIsCompatibleWithDevice = true;
            StringBuilder stringBuilder = new StringBuilder(300);

            stringBuilder.Append("<eas-provisioningdoc xmlns=\"Provision:\">");
            policyIsCompatibleWithDevice = ProvisionCommandPhaseOne.BuildEAS25And120Provisions(stringBuilder, deviceVersion, mailboxPolicy);
            policyIsCompatibleWithDevice = (policyIsCompatibleWithDevice && ProvisionCommandPhaseOne.BuildEAS121Provisions(stringBuilder, deviceVersion, mailboxPolicy));
            stringBuilder.Append("</eas-provisioningdoc>");
            return(stringBuilder.ToString());
        }
        private bool ProcessPolicy(XmlNode response)
        {
            uint?headerPolicyKey = this.owningCommand.HeaderPolicyKey;

            base.GlobalInfo.ProvisionSupported = true;
            bool flag;

            Command.DetectPolicyChange(this.owningCommand.PolicyData, base.GlobalInfo, this.owningCommand.ProtocolVersion, out flag);
            if (!flag)
            {
                this.owningCommand.ProtocolLogger.SetValue(ProtocolLoggerData.Error, "DeviceNotFullyProvisionable");
                this.owningCommand.SetErrorResponse(HttpStatusCode.Forbidden, StatusCode.DeviceNotFullyProvisionable);
                base.GlobalInfo.DevicePolicyApplicationStatus = DevicePolicyApplicationStatus.NotApplied;
                return(false);
            }
            if (this.requestPolicyType != null)
            {
                if (this.deviceInformationNode == null && this.owningCommand.ProtocolVersion >= 141)
                {
                    throw new AirSyncPermanentException(StatusCode.DeviceInformationRequired, false)
                          {
                              ErrorStringForProtocolLogger = "DeviceInfoRequiredInProvision"
                          };
                }
                if (string.Equals(this.requestPolicyType, "MS-WAP-Provisioning-XML", StringComparison.OrdinalIgnoreCase))
                {
                    if (this.owningCommand.ProtocolVersion > 25)
                    {
                        this.owningCommand.ProtocolLogger.SetValue(ProtocolLoggerData.Error, "CannotUseWAP");
                        this.responseProvisionStatus = ProvisionCommand.ProvisionStatusCode.ProtocolError;
                        base.GlobalInfo.DevicePolicyApplicationStatus = DevicePolicyApplicationStatus.NotApplied;
                        return(true);
                    }
                    if (base.GlobalInfo.PolicyKeyNeeded != 0U || (string.Equals(this.requestPolicyType, "MS-WAP-Provisioning-XML", StringComparison.OrdinalIgnoreCase) && headerPolicyKey != null && headerPolicyKey != 0U))
                    {
                        this.responsePolicyType = this.requestPolicyType;
                        IPolicyData policyData = this.owningCommand.PolicyData;
                        this.responsePolicyData   = ProvisionCommandPhaseOne.BuildWAPProvisionDoc(policyData);
                        this.responsePolicyStatus = ProvisionCommand.PolicyStatusCode.Success;
                        this.responsePolicyKey    = new uint?(base.GlobalInfo.PolicyKeyWaitingAck);
                    }
                    else
                    {
                        this.responsePolicyStatus = ProvisionCommand.PolicyStatusCode.NoPolicy;
                        this.responsePolicyType   = this.requestPolicyType;
                    }
                }
                else if (string.Equals(this.requestPolicyType, "MS-EAS-Provisioning-WBXML", StringComparison.OrdinalIgnoreCase))
                {
                    if (base.GlobalInfo.PolicyKeyNeeded != 0U)
                    {
                        this.responsePolicyType = this.requestPolicyType;
                        IPolicyData policyData2 = this.owningCommand.PolicyData;
                        this.responsePolicyData   = ProvisionCommandPhaseOne.BuildEASProvisionDoc(policyData2, this.owningCommand.ProtocolVersion, out flag);
                        this.responsePolicyStatus = ProvisionCommand.PolicyStatusCode.Success;
                        this.responsePolicyKey    = new uint?(base.GlobalInfo.PolicyKeyWaitingAck);
                    }
                    else if (base.GlobalInfo.PolicyKeyOnDevice != 0U || (string.Equals(this.requestPolicyType, "MS-EAS-Provisioning-WBXML", StringComparison.OrdinalIgnoreCase) && headerPolicyKey != null && headerPolicyKey != 0U))
                    {
                        this.responsePolicyType   = this.requestPolicyType;
                        this.responsePolicyData   = "<eas-provisioningdoc xmlns=\"Provision:\"><DevicePasswordEnabled>0</DevicePasswordEnabled></eas-provisioningdoc>";
                        this.responsePolicyStatus = ProvisionCommand.PolicyStatusCode.Success;
                        this.responsePolicyKey    = new uint?(base.GlobalInfo.PolicyKeyWaitingAck);
                    }
                    else
                    {
                        this.responsePolicyStatus = ProvisionCommand.PolicyStatusCode.NoPolicy;
                        this.responsePolicyType   = this.requestPolicyType;
                    }
                }
                else
                {
                    if (this.requestPolicyType.Length == 0)
                    {
                        base.GlobalInfo.DevicePolicyApplicationStatus = DevicePolicyApplicationStatus.NotApplied;
                        this.responseProvisionStatus = ProvisionCommand.ProvisionStatusCode.ProtocolError;
                        return(true);
                    }
                    base.GlobalInfo.DevicePolicyApplicationStatus = DevicePolicyApplicationStatus.NotApplied;
                    this.responsePolicyType      = this.requestPolicyType;
                    this.responsePolicyStatus    = ProvisionCommand.PolicyStatusCode.UnknownPolicyType;
                    this.responseProvisionStatus = ProvisionCommand.ProvisionStatusCode.Success;
                    return(true);
                }
            }
            this.responseProvisionStatus = ProvisionCommand.ProvisionStatusCode.Success;
            return(true);
        }
        private static bool BuildEAS121Provisions(StringBuilder xml, int deviceVersion, IPolicyData mailboxPolicy)
        {
            bool flag = true;
            bool allowNonProvisionableDevices = mailboxPolicy.AllowNonProvisionableDevices;

            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowStorageCard", mailboxPolicy.AllowStorageCard, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowCamera", mailboxPolicy.AllowCamera, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "RequireDeviceEncryption", mailboxPolicy.RequireDeviceEncryption, allowNonProvisionableDevices, deviceVersion, 121, false);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowUnsignedApplications", mailboxPolicy.AllowUnsignedApplications, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowUnsignedInstallationPackages", mailboxPolicy.AllowUnsignedInstallationPackages, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= (ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MinDevicePasswordComplexCharacters", mailboxPolicy.MinDevicePasswordComplexCharacters, allowNonProvisionableDevices, deviceVersion, 121, 1) || !mailboxPolicy.AlphanumericDevicePasswordRequired);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowWiFi", mailboxPolicy.AllowWiFi, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowTextMessaging", mailboxPolicy.AllowTextMessaging, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowPOPIMAPEmail", mailboxPolicy.AllowPOPIMAPEmail, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowBluetooth", (int)mailboxPolicy.AllowBluetooth, allowNonProvisionableDevices, deviceVersion, 121, 2);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowIrDA", mailboxPolicy.AllowIrDA, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "RequireManualSyncWhenRoaming", mailboxPolicy.RequireManualSyncWhenRoaming, allowNonProvisionableDevices, deviceVersion, 121, false);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowDesktopSync", mailboxPolicy.AllowDesktopSync, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxCalendarAgeFilter", (int)mailboxPolicy.MaxCalendarAgeFilter, allowNonProvisionableDevices, deviceVersion, 121, 0);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowHTMLEmail", mailboxPolicy.AllowHTMLEmail, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxEmailAgeFilter", (int)mailboxPolicy.MaxEmailAgeFilter, allowNonProvisionableDevices, deviceVersion, 121, 0);
            if (!mailboxPolicy.MaxEmailBodyTruncationSize.IsUnlimited)
            {
                flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxEmailBodyTruncationSize", mailboxPolicy.MaxEmailBodyTruncationSize.Value, allowNonProvisionableDevices, deviceVersion, 121, null);
            }
            else
            {
                flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxEmailBodyTruncationSize", -1, allowNonProvisionableDevices, deviceVersion, 121, -1);
            }
            if (!mailboxPolicy.MaxEmailHTMLBodyTruncationSize.IsUnlimited)
            {
                flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxEmailHTMLBodyTruncationSize", mailboxPolicy.MaxEmailHTMLBodyTruncationSize.Value, allowNonProvisionableDevices, deviceVersion, 121, null);
            }
            else
            {
                flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "MaxEmailHTMLBodyTruncationSize", -1, allowNonProvisionableDevices, deviceVersion, 121, -1);
            }
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "RequireSignedSMIMEMessages", mailboxPolicy.RequireSignedSMIMEMessages, allowNonProvisionableDevices, deviceVersion, 121, false);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "RequireEncryptedSMIMEMessages", mailboxPolicy.RequireEncryptedSMIMEMessages, allowNonProvisionableDevices, deviceVersion, 121, false);
            ProvisionCommandPhaseOne.AppendEASAttribute(xml, "RequireSignedSMIMEAlgorithm", (int)mailboxPolicy.RequireSignedSMIMEAlgorithm, allowNonProvisionableDevices, deviceVersion, 121, false);
            ProvisionCommandPhaseOne.AppendEASAttribute(xml, "RequireEncryptionSMIMEAlgorithm", (int)mailboxPolicy.RequireEncryptionSMIMEAlgorithm, allowNonProvisionableDevices, deviceVersion, 121, false);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowSMIMEEncryptionAlgorithmNegotiation", (int)mailboxPolicy.AllowSMIMEEncryptionAlgorithmNegotiation, allowNonProvisionableDevices, deviceVersion, 121, 2);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowSMIMESoftCerts", mailboxPolicy.AllowSMIMESoftCerts, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowBrowser", mailboxPolicy.AllowBrowser, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowConsumerEmail", mailboxPolicy.AllowConsumerEmail, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowRemoteDesktop", mailboxPolicy.AllowRemoteDesktop, allowNonProvisionableDevices, deviceVersion, 121, true);
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "AllowInternetSharing", mailboxPolicy.AllowInternetSharing, allowNonProvisionableDevices, deviceVersion, 121, true);
            StringBuilder stringBuilder = new StringBuilder(300);
            MultiValuedProperty <string> unapprovedInROMApplicationList = mailboxPolicy.UnapprovedInROMApplicationList;

            if (unapprovedInROMApplicationList != null)
            {
                foreach (string str in unapprovedInROMApplicationList)
                {
                    stringBuilder.AppendFormat("<{0}>{1}</{0}>", "ApplicationName", SecurityElement.Escape(str));
                }
            }
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "UnapprovedInROMApplicationList", stringBuilder.ToString(), allowNonProvisionableDevices, deviceVersion, 121, string.Empty);
            stringBuilder.Length = 0;
            ApprovedApplicationCollection approvedApplicationList = mailboxPolicy.ApprovedApplicationList;

            if (approvedApplicationList != null)
            {
                foreach (ApprovedApplication approvedApplication in approvedApplicationList)
                {
                    stringBuilder.AppendFormat("<{0}>{1}</{0}>", "Hash", Convert.ToBase64String(HexStringConverter.GetBytes(approvedApplication.AppHash, false)));
                }
            }
            flag &= ProvisionCommandPhaseOne.AppendEASAttribute(xml, "ApprovedApplicationList", stringBuilder.ToString(), allowNonProvisionableDevices, deviceVersion, 121, string.Empty);
            return(flag);
        }