/// <summary> /// Executes when a change event is received from a Terminal Server session. /// </summary> /// <param name="changeDescription"> /// Identifies the type of session change and the session to which it applies. /// </param> protected override void OnSessionChange(SessionChangeDescription changeDescription) { switch (changeDescription.Reason) { // The user has logged off from a session, either locally or remotely. case SessionChangeReason.SessionLogoff: EncryptedSettings encryptedSettings = new EncryptedSettings(EncryptedSettings.SettingsFilePath); System.Collections.Generic.List <SecurityIdentifier> sidsToRemove = new System.Collections.Generic.List <SecurityIdentifier>(encryptedSettings.AddedUserSIDs); int[] sessionIds = LsaLogonSessions.LogonSessions.GetLoggedOnUserSessionIds(); // For any user that is still logged on, remove their SID from the list of // SIDs to be removed from Administrators. That is, let the users who are still // logged on stay in the Administrators group. foreach (int id in sessionIds) { SecurityIdentifier sid = LsaLogonSessions.LogonSessions.GetSidForSessionId(id); if (sid != null) { if (sidsToRemove.Contains(sid)) { sidsToRemove.Remove(sid); } } } // Process the list of SIDs to be removed from Administrators. for (int i = 0; i < sidsToRemove.Count; i++) { if ( // If the user is not remote. (!(encryptedSettings.ContainsSID(sidsToRemove[i]) && encryptedSettings.IsRemote(sidsToRemove[i]))) && // If admin rights are to be removed on logoff, or the user's rights do not expire. (Settings.RemoveAdminRightsOnLogout || !encryptedSettings.GetExpirationTime(sidsToRemove[i]).HasValue) ) { LocalAdministratorGroup.RemoveUser(sidsToRemove[i], RemovalReason.UserLogoff); } } /* * In theory, this code should remove the user associated with the logoff, but it doesn't work. * SecurityIdentifier sid = LsaLogonSessions.LogonSessions.GetSidForSessionId(changeDescription.SessionId); * if (!(UserList.ContainsSID(sid) && UserList.IsRemote(sid))) * { * LocalAdministratorGroup.RemoveUser(sid, RemovalReason.UserLogoff); * } */ break; // The user has logged on to a session, either locally or remotely. case SessionChangeReason.SessionLogon: WindowsIdentity userIdentity = LsaLogonSessions.LogonSessions.GetWindowsIdentityForSessionId(changeDescription.SessionId); if (userIdentity != null) { NetNamedPipeBinding binding = new NetNamedPipeBinding(NetNamedPipeSecurityMode.Transport); ChannelFactory <IAdminGroup> namedPipeFactory = new ChannelFactory <IAdminGroup>(binding, Settings.NamedPipeServiceBaseAddress); IAdminGroup channel = namedPipeFactory.CreateChannel(); bool userIsAuthorizedForAutoAdd = channel.UserIsAuthorized(Settings.AutomaticAddAllowed, Settings.AutomaticAddDenied); namedPipeFactory.Close(); // If the user is in the automatic add list, then add them to the Administrators group. if ( (Settings.AutomaticAddAllowed != null) && (Settings.AutomaticAddAllowed.Length > 0) && (userIsAuthorizedForAutoAdd /*UserIsAuthorized(userIdentity, Settings.AutomaticAddAllowed, Settings.AutomaticAddDenied)*/) ) { LocalAdministratorGroup.AddUser(userIdentity, null, null); } } else { ApplicationLog.WriteEvent(Properties.Resources.UserIdentifyIsNull, EventID.DebugMessage, System.Diagnostics.EventLogEntryType.Warning); } break; /* * // The user has reconnected or logged on to a remote session. * case SessionChangeReason.RemoteConnect: * ApplicationLog.WriteInformationEvent(string.Format("Remote connect. Session ID: {0}", changeDescription.SessionId), EventID.SessionChangeEvent); * break; */ /* * // The user has disconnected or logged off from a remote session. * case SessionChangeReason.RemoteDisconnect: * ApplicationLog.WriteInformationEvent(string.Format("Remote disconnect. Session ID: {0}", changeDescription.SessionId), EventID.SessionChangeEvent); * break; */ /* * // The user has locked their session. * case SessionChangeReason.SessionLock: * ApplicationLog.WriteInformationEvent(string.Format("Session lock. Session ID: {0}", changeDescription.SessionId), EventID.SessionChangeEvent); * break; */ /* * // The user has unlocked their session. * case SessionChangeReason.SessionUnlock: * ApplicationLog.WriteInformationEvent(string.Format("Session unlock. Session ID: {0}", changeDescription.SessionId), EventID.SessionChangeEvent); * break; */ } base.OnSessionChange(changeDescription); }
/* * private bool TcpPortInUse * { * get * { * System.Net.NetworkInformation.IPGlobalProperties globalIPProps = System.Net.NetworkInformation.IPGlobalProperties.GetIPGlobalProperties(); * return globalIPProps.GetActiveTcpListeners().Where(n => n.Port == Settings.TCPServicePort).Count() > 0; * } * } */ /// <summary> /// Handles the faulted event for a WCF service host. /// </summary> /// <param name="sender"> /// The service host that has entered the faulted state. /// </param> /// <param name="e"> /// Data related to the event. /// </param> private void ServiceHostFaulted(object sender, EventArgs e) { ApplicationLog.WriteEvent(Properties.Resources.ServiceHostFaulted, EventID.DebugMessage, System.Diagnostics.EventLogEntryType.Warning); }
/// <summary> /// Validates that all of the users stored in the on-disk user list /// are in the local Administrators group if they're supposed to be, and vice-versa. /// </summary> public static void ValidateAllAddedUsers() { // Get a list of the users stored in the on-disk list. EncryptedSettings encryptedSettings = new EncryptedSettings(EncryptedSettings.SettingsFilePath); SecurityIdentifier[] addedUserList = encryptedSettings.AddedUserSIDs; // Get a list of the current members of the Administrators group. SecurityIdentifier[] localAdminSids = null; if ((addedUserList.Length > 0) && (LocalAdminGroupName != null)) { localAdminSids = GetLocalGroupMembers(LocalAdminGroupName); } for (int i = 0; i < addedUserList.Length; i++) { bool sidFoundInAdminsGroup = false; if ((addedUserList[i] != null) && (localAdminSids != null)) { foreach (SecurityIdentifier sid in localAdminSids) { if (sid == addedUserList[i]) { sidFoundInAdminsGroup = true; break; } } AdminGroupManipulator adminGroup = new AdminGroupManipulator(); if (sidFoundInAdminsGroup) { // User's SID was found in the local administrators group. DateTime?expirationTime = encryptedSettings.GetExpirationTime(addedUserList[i]); if (expirationTime.HasValue) { // The user's rights expire at some point. if (expirationTime.Value > DateTime.Now) { // The user's administrator rights expire in the future. // Nothing to do here, since the user is already in the administrators group. } else { // The user's administrator rights have expired. LocalAdministratorGroup.RemoveUser(addedUserList[i], RemovalReason.Timeout); } } else { // The user's rights never expire. // Get a WindowsIdentity object for the user matching the added user SID. WindowsIdentity sessionIdentity = null; WindowsIdentity userIdentity = null; int[] loggedOnSessionIDs = LsaLogonSessions.LogonSessions.GetLoggedOnUserSessionIds(); foreach (int sessionId in loggedOnSessionIDs) { sessionIdentity = LsaLogonSessions.LogonSessions.GetWindowsIdentityForSessionId(sessionId); if ((sessionIdentity != null) && (sessionIdentity.User == addedUserList[i])) { userIdentity = sessionIdentity; break; } } if ( (Settings.AutomaticAddAllowed != null) && (Settings.AutomaticAddAllowed.Length > 0) && (adminGroup.UserIsAuthorized(Settings.AutomaticAddAllowed, Settings.AutomaticAddDenied)) ) { // The user is an automatically-added user. // Nothing to do here. The user is an automatically-added one, and their rights don't expire. } else { // The user is not an automatically-added user. // Users who are not automatically added should not have non-expiring rights. Remove this user. LocalAdministratorGroup.RemoveUser(addedUserList[i], RemovalReason.Timeout); } } } else { // User's SID was not found in the local administrators group. DateTime?expirationTime = encryptedSettings.GetExpirationTime(addedUserList[i]); if (expirationTime.HasValue) { // The user's rights expire at some point. if (expirationTime.Value > DateTime.Now) { // The user's administrator rights expire in the future. string accountName = GetAccountNameFromSID(addedUserList[i]); if (Settings.OverrideRemovalByOutsideProcess) { ApplicationLog.WriteEvent(string.Format(Properties.Resources.UserRemovedByOutsideProcess + " " + Properties.Resources.AddingUserBackToAdministrators, addedUserList[i], string.IsNullOrEmpty(accountName) ? Properties.Resources.UnknownAccount : accountName), EventID.UserRemovedByExternalProcess, System.Diagnostics.EventLogEntryType.Information); AddUserToAdministrators(addedUserList[i]); } else { ApplicationLog.WriteEvent(string.Format(Properties.Resources.UserRemovedByOutsideProcess + " " + Properties.Resources.RemovingUserFromList, addedUserList[i], string.IsNullOrEmpty(accountName) ? Properties.Resources.UnknownAccount : accountName), EventID.UserRemovedByExternalProcess, System.Diagnostics.EventLogEntryType.Information); encryptedSettings.RemoveUser(addedUserList[i]); } } else { // The user's administrator rights have expired. // No need to remove from the administrators group, as we already know the SID // is not present in the group. encryptedSettings.RemoveUser(addedUserList[i]); } } else { // The user's rights never expire. // Get a WindowsIdentity object for the user matching the added user SID. WindowsIdentity sessionIdentity = null; WindowsIdentity userIdentity = null; int[] loggedOnSessionIDs = LsaLogonSessions.LogonSessions.GetLoggedOnUserSessionIds(); foreach (int sessionId in loggedOnSessionIDs) { sessionIdentity = LsaLogonSessions.LogonSessions.GetWindowsIdentityForSessionId(sessionId); if ((sessionIdentity != null) && (sessionIdentity.User == addedUserList[i])) { userIdentity = sessionIdentity; break; } } if ( (Settings.AutomaticAddAllowed != null) && (Settings.AutomaticAddAllowed.Length > 0) && (adminGroup.UserIsAuthorized(Settings.AutomaticAddAllowed, Settings.AutomaticAddDenied)) ) { // The user is an automatically-added user. // The users rights do not expire, but they are an automatically-added user and are missing // from the Administrators group. Add the user back in. AddUserToAdministrators(addedUserList[i]); } else { // The user is not an automatically-added user. // The user is not in the Administrators group now, but they are // listed as having non-expiring rights, even though they are not // automatically added. This should never really happen, but // just in case, we'll remove them from the on-disk user list. encryptedSettings.RemoveUser(addedUserList[i]); } } } } } }
/// <summary> /// Creates the WCF Service Host which is accessible via TCP. /// </summary> private void OpenTcpServiceHost() { if ((null != this.tcpServiceHost) && (this.tcpServiceHost.State == CommunicationState.Opened)) { this.tcpServiceHost.Close(); } this.tcpServiceHost = new ServiceHost(typeof(AdminGroupManipulator), new Uri(Settings.TcpServiceBaseAddress)); this.tcpServiceHost.Faulted += ServiceHostFaulted; NetTcpBinding binding = new NetTcpBinding(SecurityMode.Transport) { PortSharingEnabled = true }; // If port sharing is enabled, then the Net.Tcp Port Sharing Service must be available as well. if (PortSharingServiceExists) { ServiceController controller = new ServiceController(portSharingServiceName); switch (controller.StartType) { case ServiceStartMode.Disabled: ApplicationLog.WriteEvent("The Net.Tcp Port Sharing Service is disabled. Remote access will not be available.", EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Warning); return; /* * case ServiceStartMode.Automatic: #if DEBUG * ApplicationLog.WriteEvent("Port sharing service is set to start automatically.", EventID.DebugMessage, System.Diagnostics.EventLogEntryType.Information); #endif * break; * case ServiceStartMode.Manual: #if DEBUG * ApplicationLog.WriteEvent("Port sharing service is set to start manually.", EventID.DebugMessage, System.Diagnostics.EventLogEntryType.Information); #endif * int waitCount = 0; * while ((controller.Status != ServiceControllerStatus.Running) && (waitCount < 10)) * { * switch (controller.Status) * { * case ServiceControllerStatus.Paused: * controller.Continue(); * controller.WaitForStatus(ServiceControllerStatus.Running, new TimeSpan(0, 0, 5)); * break; * case ServiceControllerStatus.Stopped: * try * { * controller.Start(); * controller.WaitForStatus(ServiceControllerStatus.Running, new TimeSpan(0, 0, 5)); * } * catch (Win32Exception win32Exception) * { * ApplicationLog.WriteEvent(win32Exception.Message, EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Error); * } * catch (InvalidOperationException invalidOpException) * { * ApplicationLog.WriteEvent(invalidOpException.Message, EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Error); * } * break; * } * System.Threading.Thread.Sleep(1000); * waitCount++; * } * * if (controller.Status != ServiceControllerStatus.Running) * { * ApplicationLog.WriteEvent(string.Format("Port {0} is already in use, but the Net.Tcp Port Sharing Service is not running. Remote access will not be available.", Settings.TCPServicePort), EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Warning); * } * * break; */ } controller.Close(); } else { ApplicationLog.WriteEvent(string.Format("Port {0} is already in use, but the Net.Tcp Port Sharing Service does not exist. Remote access will not be available.", Settings.TCPServicePort), EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Warning); return; } this.tcpServiceHost.AddServiceEndpoint(typeof(IAdminGroup), binding, Settings.TcpServiceBaseAddress); try { this.tcpServiceHost.Open(); } catch (ObjectDisposedException) { ApplicationLog.WriteEvent("The communication object is in a Closing or Closed state and cannot be modified.", EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Warning); } catch (InvalidOperationException) { ApplicationLog.WriteEvent("The communication object is not in a Opened or Opening state and cannot be modified.", EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Warning); } catch (CommunicationObjectFaultedException) { ApplicationLog.WriteEvent("The communication object is in a Faulted state and cannot be modified.", EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Warning); } catch (System.TimeoutException) { ApplicationLog.WriteEvent("The default interval of time that was allotted for the operation was exceeded before the operation was completed.", EventID.RemoteAccessFailure, System.Diagnostics.EventLogEntryType.Warning); } }
public static void ValidateAllAddedPrincipals() { SecurityIdentifier[] localAdminSids = null; /* string[] addedSids = PrincipalList.GetSIDs(); */ SecurityIdentifier[] addedSids = PrincipalList.GetSIDs(); if ((addedSids.Length > 0) && (LocalAdminGroup != null)) { localAdminSids = GetLocalGroupMembers(null, LocalAdminGroup.SamAccountName); } for (int i = 0; i < addedSids.Length; i++) { bool sidFoundInAdminsGroup = false; if ((addedSids[i] != null) && (localAdminSids != null)) { foreach (SecurityIdentifier sid in localAdminSids) { if (sid == addedSids[i]) { sidFoundInAdminsGroup = true; break; } } if (sidFoundInAdminsGroup) { // Principal's SID was found in the local administrators group. if (PrincipalList.GetExpirationTime(addedSids[i]).HasValue) { // The principal's rights expire at some point. if (PrincipalList.GetExpirationTime(addedSids[i]).Value > DateTime.Now) { // The principal's administrator rights expire in the future. // Nothing to do here, since the principal is already in the administrators group. } else { // The principal's administrator rights have expired. #if DEBUG string accountName = GetAccountNameFromSID(addedSids[i]); ApplicationLog.WriteInformationEvent(string.Format("Principal {0} ({1}) has been removed from the Administrators group by an outside process. Removing the principal from Make Me Admin's list.", addedSids[i], string.IsNullOrEmpty(accountName) ? "unknown account" : accountName), EventID.DebugMessage); #endif LocalAdministratorGroup.RemovePrincipal(addedSids[i], RemovalReason.Timeout); } } // TODO: This should be put back in, but it needs to account for the fact that // some principals may be added without expiration times. /* * else * { // The principal's rights never expire. This should never happen. * // Remove the principal from the administrator group. #if DEBUG * string accountName = GetAccountNameFromSID(addedSids[i]); * ApplicationLog.WriteInformationEvent(string.Format("Principal {0} ({1}) has been removed from the Administrators group by an outside process. Removing the principal from Make Me Admin's list.", addedSids[i], string.IsNullOrEmpty(accountName) ? "unknown account" : accountName), EventID.DebugMessage); #endif * LocalAdministratorGroup.RemovePrincipal(addedSids[i], RemovalReason.Timeout); * * if ( * (Settings.AutomaticAddAllowed != null) && * (Settings.AutomaticAddAllowed.Length > 0) && * (Shared.UserIsAuthorized(userIdentity, Settings.AutomaticAddAllowed, Settings.AutomaticAddDenied)) * ) * { #if DEBUG * ApplicationLog.WriteInformationEvent("User is allowed to be automatically added!", EventID.DebugMessage); #endif * LocalAdministratorGroup.AddPrincipal(userIdentity, null, null); * } * } */ } else { // Principal's SID was not found in the local administrators group. if (PrincipalList.GetExpirationTime(addedSids[i]).HasValue) { // The principal's rights expire at some point. if (PrincipalList.GetExpirationTime(addedSids[i]).Value > DateTime.Now) { // The principal's administrator rights expire in the future. string accountName = GetAccountNameFromSID(addedSids[i]); if (Settings.OverrideRemovalByOutsideProcess) { // TODO: i18n. ApplicationLog.WriteInformationEvent(string.Format("Principal {0} ({1}) has been removed from the Administrators group by an outside process. Adding the principal back to the Administrators group.", addedSids[i], string.IsNullOrEmpty(accountName) ? "unknown account" : accountName), EventID.PrincipalRemovedByExternalProcess); AddPrincipalToAdministrators(addedSids[i], null); } else { // TODO: i18n. ApplicationLog.WriteInformationEvent(string.Format("Principal {0} ({1}) has been removed from the Administrators group by an outside process. Removing the principal from Make Me Admin's list.", addedSids[i], string.IsNullOrEmpty(accountName) ? "unknown account" : accountName), EventID.PrincipalRemovedByExternalProcess); PrincipalList.RemoveSID(addedSids[i]); Settings.SIDs = PrincipalList.GetSIDs().Select(p => p.Value).ToArray <string>(); } } else { // The principal's administrator rights have expired. // No need to remove from the administrators group, as we already know the SID // is not present in the group. #if DEBUG ApplicationLog.WriteInformationEvent(string.Format("Removing SID \"{0}\" from the principal list.", addedSids[i]), EventID.DebugMessage); #endif PrincipalList.RemoveSID(addedSids[i]); Settings.SIDs = PrincipalList.GetSIDs().Select(p => p.Value).ToArray <string>(); } } /* * Rights shouldn't need to be removed here, as we already know the SID is not * a member of the local administrator group. * else * { // The principal's rights never expire. This should never happen. * // Remove the principal from the administrator. group. * LocalAdministratorGroup.RemovePrincipal(addedSids[i], RemovalReason.Timeout); * } */ } } } }