/// <summary>
/// Handles the Elapsed event for the rights removal timer.
/// </summary>
/// <param name="sender">
/// The timer whose Elapsed event is firing.
/// </param>
/// <param name="e">
/// Data related to the event.
/// </param>
private void RemovalTimerElapsed(object sender, System.Timers.ElapsedEventArgs e)
{
EncryptedSettings encryptedSettings = new EncryptedSettings(EncryptedSettings.SettingsFilePath);
User[] expiredUsers = encryptedSettings.GetExpiredUsers();
if (expiredUsers != null)
{
foreach (User prin in expiredUsers)
{
LocalAdministratorGroup.RemoveUser(prin.Sid, RemovalReason.Timeout);
if ((Settings.EndRemoteSessionsUponExpiration) && (!string.IsNullOrEmpty(prin.RemoteAddress)))
{
string userName = prin.Name;
while (userName.LastIndexOf("\\") >= 0)
{
userName = userName.Substring(userName.LastIndexOf("\\") + 1);
}
int returnCode = 0;
if (!string.IsNullOrEmpty(userName))
{
returnCode = LocalAdministratorGroup.EndNetworkSession(string.Format(@"\\{0}", prin.RemoteAddress), userName);
}
}
}
}
LocalAdministratorGroup.ValidateAllAddedUsers();
}
/// <summary>
/// Determines whether the given array of SIDs/Identities contains the given target user identity.
/// </summary>
/// <param name="accountList">
/// An array to be searched for the target identity.
/// </param>
/// <param name="userIdentity">
/// The user identity to check to see if they or one of the groups they belong to are in the list of identities.
/// </param>
/// <returns>
/// Returns true if the given target identity is present in the array of SIDs/Identities.
/// If the array is null or empty, false is returned.
/// </returns>
private static bool AccountListContainsIdentity(string[] accountList, WindowsIdentity userIdentity)
{
if (accountList != null)
{
foreach (string account in accountList)
{
SecurityIdentifier sid = LocalAdministratorGroup.GetSIDFromAccountName(account);
// If the user's SID or name is in the list, return true
if (sid == userIdentity.User)
{
return(true);
}
// If any of the user's authorization groups are in the denied list, the user is not authorized.
foreach (IdentityReference groupsid in userIdentity.Groups)
{
// Translate the NT Account (Domain\User) to SID if needed, and check the resulting values.
if (sid == (SecurityIdentifier)groupsid.Translate(typeof(SecurityIdentifier)))
{
return(true);
}
}
}
}
return(false);
}
/// <summary>
/// Adds a user to the local Administrators group.
/// </summary>
public void AddUserToAdministratorsGroup(DateTime expirationTime)
{
string remoteAddress = null;
WindowsIdentity userIdentity = null;
if (ServiceSecurityContext.Current != null)
{
userIdentity = ServiceSecurityContext.Current.WindowsIdentity;
}
if (OperationContext.Current != null)
{
if (OperationContext.Current.IncomingMessageProperties != null)
{
if (OperationContext.Current.IncomingMessageProperties.ContainsKey(RemoteEndpointMessageProperty.Name))
{
remoteAddress = ((RemoteEndpointMessageProperty)OperationContext.Current.IncomingMessageProperties[RemoteEndpointMessageProperty.Name]).Address;
if (remoteAddress != null)
{
ApplicationLog.WriteEvent(string.Format(Properties.Resources.RequestSentFromHost, remoteAddress), EventID.RemoteRequestInformation, System.Diagnostics.EventLogEntryType.Information);
}
}
}
}
if (userIdentity != null)
{
int timeoutMinutes = GetTimeoutForUser(userIdentity);
LocalAdministratorGroup.AddUser(userIdentity, expirationTime, remoteAddress);
}
}
/// <summary>
/// Handles the stopping of the service.
/// </summary>
/// <remarks>
/// Executes when a stop command is sent to the service by the Service Control Manager (SCM).
/// </remarks>
protected override void OnStop()
{
if ((this.namedPipeServiceHost != null) && (this.namedPipeServiceHost.State == CommunicationState.Opened))
{
this.namedPipeServiceHost.Close();
}
if ((this.tcpServiceHost != null) && (this.tcpServiceHost.State == CommunicationState.Opened))
{
this.tcpServiceHost.Close();
}
this.removalTimer.Stop();
EncryptedSettings encryptedSettings = new EncryptedSettings(EncryptedSettings.SettingsFilePath);
SecurityIdentifier[] sids = encryptedSettings.AddedUserSIDs;
for (int i = 0; i < sids.Length; i++)
{
LocalAdministratorGroup.RemoveUser(sids[i], RemovalReason.ServiceStopped);
}
if (processWatchSession != null)
{
processWatchSession.Dispose();
}
base.OnStop();
}
/// <summary>
/// Removes a user from the local Administrators group.
/// </summary>
/// <param name="reason">
/// The reason that the rights are being removed.
/// </param>
public void RemoveUserFromAdministratorsGroup(RemovalReason reason)
{
WindowsIdentity userIdentity = null;
if (ServiceSecurityContext.Current != null)
{
userIdentity = ServiceSecurityContext.Current.WindowsIdentity;
}
if (userIdentity != null)
{
LocalAdministratorGroup.RemoveUser(userIdentity.User, reason);
}
}
public void AddPrincipalToAdministratorsGroup()
{
string remoteAddress = null;
WindowsIdentity userIdentity = null;
if (ServiceSecurityContext.Current != null)
{
userIdentity = ServiceSecurityContext.Current.WindowsIdentity;
}
#if DEBUG
else
{
ApplicationLog.WriteWarningEvent("Current service security context is null.", EventID.DebugMessage);
}
#endif
if (OperationContext.Current != null)
{
if (OperationContext.Current.IncomingMessageProperties != null)
{
if (OperationContext.Current.IncomingMessageProperties.ContainsKey(RemoteEndpointMessageProperty.Name))
{
remoteAddress = ((RemoteEndpointMessageProperty)OperationContext.Current.IncomingMessageProperties[RemoteEndpointMessageProperty.Name]).Address;
}
}
}
#if DEBUG
if (remoteAddress != null)
{
string message = string.Format("Administrator rights request came from [{0}].", remoteAddress);
ApplicationLog.WriteInformationEvent(message, EventID.DebugMessage);
}
#endif
if (userIdentity != null)
{
int timeoutMinutes = Shared.GetTimeoutForUser(userIdentity);
DateTime expirationTime = DateTime.Now.AddMinutes(timeoutMinutes);
LocalAdministratorGroup.AddPrincipal(userIdentity, expirationTime, remoteAddress);
}
}
/// <summary>
/// Handles the Elapsed event for the rights removal timer.
/// </summary>
/// <param name="sender">
/// The timer whose Elapsed event is firing.
/// </param>
/// <param name="e">
/// Data related to the event.
/// </param>
private void RemovalTimerElapsed(object sender, System.Timers.ElapsedEventArgs e)
{
EncryptedSettings encryptedSettings = new EncryptedSettings(EncryptedSettings.SettingsFilePath);
User[] expiredUsers = encryptedSettings.GetExpiredUsers();
if (expiredUsers != null)
{
foreach (User prin in expiredUsers)
{
LocalAdministratorGroup.RemoveUser(prin.Sid, RemovalReason.Timeout);
if ((Settings.EndRemoteSessionsUponExpiration) && (!string.IsNullOrEmpty(prin.RemoteAddress)))
{
string userName = prin.Name;
while (userName.LastIndexOf("\\") >= 0)
{
userName = userName.Substring(userName.LastIndexOf("\\") + 1);
}
// TODO: Log this return code if it's not a success?
int returnCode = 0;
if (!string.IsNullOrEmpty(userName))
{
returnCode = LocalAdministratorGroup.EndNetworkSession(string.Format(@"\\{0}", prin.RemoteAddress), userName);
}
}
}
}
LocalAdministratorGroup.ValidateAllAddedUsers();
if (Settings.LogElevatedProcesses != ElevatedProcessLogging.Never)
{
if (this.processWatchSession == null)
{
StartTracing();
}
if (this.processWatchSession != null)
{
LogProcesses();
}
}
}
private void RemovalTimerElapsed(object sender, System.Timers.ElapsedEventArgs e)
{
/*
* string[] expiredSidStrings = PrincipalList.GetExpiredSIDs();
* foreach (string sidString in expiredSidStrings)
* {
* LocalAdministratorGroup.RemovePrincipal(new SecurityIdentifier(sidString), RemovalReason.Timeout);
* }
*/
Principal[] expiredPrincipals = PrincipalList.GetExpiredPrincipals();
foreach (Principal prin in expiredPrincipals)
{
#if DEBUG
ApplicationLog.WriteInformationEvent(string.Format("Expired Principal: {0}", prin.PrincipalSid.Value), EventID.DebugMessage);
#endif
LocalAdministratorGroup.RemovePrincipal(prin.PrincipalSid, RemovalReason.Timeout);
if ((Settings.EndRemoteSessionsUponExpiration) && (!string.IsNullOrEmpty(prin.RemoteAddress)))
{
string userName = prin.PrincipalName;
while (userName.LastIndexOf("\\") >= 0)
{
userName = userName.Substring(userName.LastIndexOf("\\") + 1);
}
#if DEBUG
ApplicationLog.WriteInformationEvent(string.Format("Ending session for \"{0}\" on \"{1}.\"", userName, prin.RemoteAddress), EventID.DebugMessage);
#endif
int returnCode = Shared.EndNetworkSession(string.Format(@"\\{0}", prin.RemoteAddress), userName);
#if DEBUG
ApplicationLog.WriteInformationEvent(string.Format("Ending session returned error code {0}.", returnCode), EventID.DebugMessage);
#endif
}
}
LocalAdministratorGroup.ValidateAllAddedPrincipals();
}
protected override void OnStop()
{
if (this.namedPipeServiceHost.State == CommunicationState.Opened)
{
this.namedPipeServiceHost.Close();
}
if ((this.tcpServiceHost != null) && (this.tcpServiceHost.State == CommunicationState.Opened))
{
this.tcpServiceHost.Close();
}
this.removalTimer.Stop();
SecurityIdentifier[] sids = PrincipalList.GetSIDs();
for (int i = 0; i < sids.Length; i++)
{
LocalAdministratorGroup.RemovePrincipal(sids[i], RemovalReason.ServiceStopped);
}
base.OnStop();
}
/// <summary>
/// Validates that all of the users stored in the on-disk user list
/// are in the local Adminstrators group if they're supposed to be, and vice-vera.
/// </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) && (LocalAdminGroup != null))
{
localAdminSids = GetLocalGroupMembers(LocalAdminGroup.SamAccountName);
}
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>
/// 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);
}
/// <summary>
/// Determines whether the given user is authorized to obtain administrator rights.
/// </summary>
/// <param name="userIdentity">
/// An identity object representing the user whose authorization is to be checked.
/// </param>
/// <param name="allowedSidsList">
/// The list of allowed SIDs and principal names against which the user's identity is checked.
/// </param>
/// <param name="deniedSidsList">
/// The list of denied SIDs and principal names against which the user's identity is checked.
/// </param>
/// <returns>
/// Returns true if the user is authorized to obtain administrator rights.
/// </returns>
public bool UserIsAuthorized(string[] allowedSidsList, string[] deniedSidsList)
{
WindowsIdentity userIdentity = null;
if (ServiceSecurityContext.Current != null)
{
userIdentity = ServiceSecurityContext.Current.WindowsIdentity;
}
if (userIdentity == null)
{
return(false);
}
if ((deniedSidsList != null) && (deniedSidsList.Length > 0))
{ // The denied list contains entries. Check the user against that list first.
// If the user's SID or name is in the denied list, the user is not authorized.
if ((ArrayContainsString(deniedSidsList, userIdentity.User.Value)) || (ArrayContainsString(deniedSidsList, userIdentity.Name)))
{
return(false);
}
// If any of the user's authorization groups are in the denied list, the user is not authorized.
foreach (SecurityIdentifier sid in userIdentity.Groups)
{
// Check the SID values.
if (ArrayContainsString(deniedSidsList, sid.Value))
{
return(false);
}
// Translate the SID to an NT Account (Domain\User), and check the resulting values.
if (ArrayContainsString(deniedSidsList, LocalAdministratorGroup.GetAccountNameFromSID(sid)))
{
return(false);
}
}
}
// The user hasn't been denied yet, so now we check for authorization.
// Check the authorization list.
if (allowedSidsList == null)
{ // The allowed list is null, meaning everyone is allowed administrator rights.
return(true);
}
else if (allowedSidsList.Length == 0)
{ // The allowed list is empty, meaning no one is allowed administrator rights.
return(false);
}
else
{ // The allowed list has entries.
// If the user's SID is in the allowed list, the user is authorized.
if ((ArrayContainsString(allowedSidsList, userIdentity.User.Value)) || (ArrayContainsString(allowedSidsList, userIdentity.Name)))
{
return(true);
}
// If any of the user's authorization groups are in the allowed list, the user is authorized.
foreach (SecurityIdentifier sid in userIdentity.Groups)
{
// Check the SID values.
if (ArrayContainsString(allowedSidsList, sid.Value))
{
return(true);
}
// Translate the SID to an NT Account (Domain\User), and check the resulting values.
if (ArrayContainsString(allowedSidsList, LocalAdministratorGroup.GetAccountNameFromSID(sid)))
{
return(true);
}
}
// The user was not found in the allowed list, so the user is not authorized.
return(false);
}
}
/// <summary>
/// Updates the variables which store the user's administrator status.
/// </summary>
private void UpdateUserAdministratorStatus()
{
this.userIsAdmin = LocalAdministratorGroup.IsMemberOfAdministrators(WindowsIdentity.GetCurrent());
this.userIsDirectAdmin = LocalAdministratorGroup.IsMemberOfAdministratorsDirectly(WindowsIdentity.GetCurrent());
}
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);
* }
*/
}
}
}
}
protected override void OnSessionChange(SessionChangeDescription changeDescription)
{
switch (changeDescription.Reason)
{
// The user has logged off from a session, either locally or remotely.
case SessionChangeReason.SessionLogoff:
#if DEBUG
ApplicationLog.WriteInformationEvent(string.Format("Session {0} has logged off.", changeDescription.SessionId), EventID.DebugMessage);
#endif
//if (Settings.RemoveAdminRightsOnLogout)
//{
System.Collections.Generic.List <SecurityIdentifier> sidsToRemove = new System.Collections.Generic.List <SecurityIdentifier>(PrincipalList.GetSIDs());
/*
#if DEBUG
* ApplicationLog.WriteInformationEvent("SID to remove list has been retrieved.", EventID.DebugMessage);
* for (int i = 0; i < sidsToRemove.Count; i++)
* {
* ApplicationLog.WriteInformationEvent(string.Format("SID to remove: {0}", sidsToRemove[i]), EventID.DebugMessage);
* }
#endif
*/
int[] sessionIds = LsaLogonSessions.LogonSessions.GetLoggedOnUserSessionIds();
foreach (int id in sessionIds)
{
SecurityIdentifier sid = LsaLogonSessions.LogonSessions.GetSidForSessionId(id);
if (sid != null)
{
if (sidsToRemove.Contains(sid))
{
sidsToRemove.Remove(sid);
}
}
}
/*
#if DEBUG
* ApplicationLog.WriteInformationEvent("SID to remove list has been updated.", EventID.DebugMessage);
* for (int i = 0; i < sidsToRemove.Count; i++)
* {
* ApplicationLog.WriteInformationEvent(string.Format("SID to remove: {0}", sidsToRemove[i]), EventID.DebugMessage);
* }
#endif
*/
for (int i = 0; i < sidsToRemove.Count; i++)
{
if (
(!(PrincipalList.ContainsSID(sidsToRemove[i]) && PrincipalList.IsRemote(sidsToRemove[i])))
&&
(Settings.RemoveAdminRightsOnLogout || !PrincipalList.GetExpirationTime(sidsToRemove[i]).HasValue)
)
{
LocalAdministratorGroup.RemovePrincipal(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 (!(PrincipalList.ContainsSID(sid) && PrincipalList.IsRemote(sid)))
* {
* LocalAdministratorGroup.RemovePrincipal(sid, RemovalReason.UserLogoff);
* }
*/
//}
/*
* else
* {
#if DEBUG
* ApplicationLog.WriteInformationEvent("Removing admin rights on log off is disabled.", EventID.DebugMessage);
#endif
* }
*/
break;
// The user has logged on to a session, either locally or remotely.
case SessionChangeReason.SessionLogon:
#if DEBUG
// TODO: i18n.
ApplicationLog.WriteInformationEvent(string.Format("Session logon. Session ID: {0}", changeDescription.SessionId), EventID.SessionChangeEvent);
#endif
WindowsIdentity userIdentity = LsaLogonSessions.LogonSessions.GetWindowsIdentityForSessionId(changeDescription.SessionId);
if (userIdentity != null)
{
/*
#if DEBUG
* ApplicationLog.WriteInformationEvent("User identity is not null.", EventID.DebugMessage);
* ApplicationLog.WriteInformationEvent(string.Format("user name: {0}", userIdentity.Name), EventID.DebugMessage);
* ApplicationLog.WriteInformationEvent(string.Format("user SID: {0}", userIdentity.User), EventID.DebugMessage);
#endif
*/
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
{
// TODO: i18n.
ApplicationLog.WriteWarningEvent("User identity is null.", EventID.DebugMessage);
}
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);
}
