base/system/winlogon/sas.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS Winlogon
   4  * FILE:            base/system/winlogon/sas.c
   5  * PURPOSE:         Secure Attention Sequence
   6  * PROGRAMMERS:     Thomas Weidenmueller (w3seek@users.sourceforge.net)
   7  *                  Hervé Poussineau (hpoussin@reactos.org)
   8  * UPDATE HISTORY:
   9  *                  Created 28/03/2004
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include "winlogon.h"
  15
  16 #include <wine/debug.h>
  17
  18 WINE_DEFAULT_DEBUG_CHANNEL(winlogon);
  19
  20 /* GLOBALS ******************************************************************/
  21
  22 #define WINLOGON_SAS_CLASS L"SAS Window class"
  23 #define WINLOGON_SAS_TITLE L"SAS window"
  24
  25 #define HK_CTRL_ALT_DEL   0
  26 #define HK_CTRL_SHIFT_ESC 1
  27
  28 extern BOOL WINAPI SetLogonNotifyWindow(HWND Wnd, HWINSTA WinSta);
  29
  30 /* FUNCTIONS ****************************************************************/
  31
  32 static BOOL
  33 StartTaskManager(
  34         IN OUT PWLSESSION Session)
  35 {
  36         LPVOID lpEnvironment;
  37         BOOL ret;
  38
  39         if (!Session->Gina.Functions.WlxStartApplication)
  40                 return FALSE;
  41
  42         if (!CreateEnvironmentBlock(
  43                 &lpEnvironment,
  44                 Session->UserToken,
  45                 TRUE))
  46         {
  47                 return FALSE;
  48         }
  49
  50         ret = Session->Gina.Functions.WlxStartApplication(
  51                 Session->Gina.Context,
  52                 L"Default",
  53                 lpEnvironment,
  54                 L"taskmgr.exe");
  55
  56         DestroyEnvironmentBlock(lpEnvironment);
  57         return ret;
  58 }
  59
  60 BOOL
  61 SetDefaultLanguage(
  62         IN BOOL UserProfile)
  63 {
  64         HKEY BaseKey;
  65         LPCWSTR SubKey;
  66         LPCWSTR ValueName;
  67         LONG rc;
  68         HKEY hKey = NULL;
  69         DWORD dwType, dwSize;
  70         LPWSTR Value = NULL;
  71         UNICODE_STRING ValueString;
  72         NTSTATUS Status;
  73         LCID Lcid;
  74         BOOL ret = FALSE;
  75
  76         if (UserProfile)
  77         {
  78                 BaseKey = HKEY_CURRENT_USER;
  79                 SubKey = L"Control Panel\\International";
  80                 ValueName = L"Locale";
  81         }
  82         else
  83         {
  84                 BaseKey = HKEY_LOCAL_MACHINE;
  85                 SubKey = L"System\\CurrentControlSet\\Control\\Nls\\Language";
  86                 ValueName = L"Default";
  87         }
  88
  89         rc = RegOpenKeyExW(
  90                 BaseKey,
  91                 SubKey,
  92                 0,
  93                 KEY_READ,
  94                 &hKey);
  95         if (rc != ERROR_SUCCESS)
  96         {
  97                 TRACE("RegOpenKeyEx() failed with error %lu\n", rc);
  98                 goto cleanup;
  99         }
 100         rc = RegQueryValueExW(
 101                 hKey,
 102                 ValueName,
 103                 NULL,
 104                 &dwType,
 105                 NULL,
 106                 &dwSize);
 107         if (rc != ERROR_SUCCESS)
 108         {
 109                 TRACE("RegQueryValueEx() failed with error %lu\n", rc);
 110                 goto cleanup;
 111         }
 112         else if (dwType != REG_SZ)
 113         {
 114                 TRACE("Wrong type for %S\\%S registry entry (got 0x%lx, expected 0x%x)\n",
 115                         SubKey, ValueName, dwType, REG_SZ);
 116                 goto cleanup;
 117         }
 118
 119         Value = HeapAlloc(GetProcessHeap(), 0, dwSize);
 120         if (!Value)
 121         {
 122                 TRACE("HeapAlloc() failed\n");
 123                 goto cleanup;
 124         }
 125         rc = RegQueryValueExW(
 126                 hKey,
 127                 ValueName,
 128                 NULL,
 129                 NULL,
 130                 (LPBYTE)Value,
 131                 &dwSize);
 132         if (rc != ERROR_SUCCESS)
 133         {
 134                 TRACE("RegQueryValueEx() failed with error %lu\n", rc);
 135                 goto cleanup;
 136         }
 137
 138         /* Convert Value to a Lcid */
 139         ValueString.Length = ValueString.MaximumLength = (USHORT)dwSize;
 140         ValueString.Buffer = Value;
 141         Status = RtlUnicodeStringToInteger(&ValueString, 16, (PULONG)&Lcid);
 142         if (!NT_SUCCESS(Status))
 143         {
 144                 TRACE("RtlUnicodeStringToInteger() failed with status 0x%08lx\n", Status);
 145                 goto cleanup;
 146         }
 147
 148         TRACE("%s language is 0x%08lx\n",
 149                 UserProfile ? "User" : "System", Lcid);
 150         Status = NtSetDefaultLocale(UserProfile, Lcid);
 151         if (!NT_SUCCESS(Status))
 152         {
 153                 TRACE("NtSetDefaultLocale() failed with status 0x%08lx\n", Status);
 154                 goto cleanup;
 155         }
 156
 157         ret = TRUE;
 158
 159 cleanup:
 160         if (hKey)
 161                 RegCloseKey(hKey);
 162         if (Value)
 163                 HeapFree(GetProcessHeap(), 0, Value);
 164         return ret;
 165 }
 166
 167 static BOOL
 168 HandleLogon(
 169         IN OUT PWLSESSION Session)
 170 {
 171         PROFILEINFOW ProfileInfo;
 172         LPVOID lpEnvironment = NULL;
 173         BOOLEAN Old;
 174         BOOL ret = FALSE;
 175
 176         /* Loading personal settings */
 177         DisplayStatusMessage(Session, Session->WinlogonDesktop, IDS_LOADINGYOURPERSONALSETTINGS);
 178         ProfileInfo.hProfile = INVALID_HANDLE_VALUE;
 179         if (0 == (Session->Options & WLX_LOGON_OPT_NO_PROFILE))
 180         {
 181                 if (Session->Profile == NULL
 182                  || (Session->Profile->dwType != WLX_PROFILE_TYPE_V1_0
 183                   && Session->Profile->dwType != WLX_PROFILE_TYPE_V2_0))
 184                 {
 185                         ERR("WL: Wrong profile\n");
 186                         goto cleanup;
 187                 }
 188
 189                 /* Load the user profile */
 190                 ZeroMemory(&ProfileInfo, sizeof(PROFILEINFOW));
 191                 ProfileInfo.dwSize = sizeof(PROFILEINFOW);
 192                 ProfileInfo.dwFlags = 0;
 193                 ProfileInfo.lpUserName = Session->MprNotifyInfo.pszUserName;
 194                 ProfileInfo.lpProfilePath = Session->Profile->pszProfile;
 195                 if (Session->Profile->dwType >= WLX_PROFILE_TYPE_V2_0)
 196                 {
 197                         ProfileInfo.lpDefaultPath = Session->Profile->pszNetworkDefaultUserProfile;
 198                         ProfileInfo.lpServerName = Session->Profile->pszServerName;
 199                         ProfileInfo.lpPolicyPath = Session->Profile->pszPolicy;
 200                 }
 201
 202                 if (!LoadUserProfileW(Session->UserToken, &ProfileInfo))
 203                 {
 204                         ERR("WL: LoadUserProfileW() failed\n");
 205                         goto cleanup;
 206                 }
 207         }
 208
 209         /* Create environment block for the user */
 210         if (!CreateEnvironmentBlock(
 211                 &lpEnvironment,
 212                 Session->UserToken,
 213                 TRUE))
 214         {
 215                 WARN("WL: CreateEnvironmentBlock() failed\n");
 216                 goto cleanup;
 217         }
 218         /* FIXME: Append variables of Session->Profile->pszEnvironment */
 219
 220         DisplayStatusMessage(Session, Session->WinlogonDesktop, IDS_APPLYINGYOURPERSONALSETTINGS);
 221         UpdatePerUserSystemParameters(0, TRUE);
 222
 223         /* Set default language */
 224         if (!SetDefaultLanguage(TRUE))
 225         {
 226                 WARN("WL: SetDefaultLanguage() failed\n");
 227                 goto cleanup;
 228         }
 229
 230         /* Get privilege */
 231         /* FIXME: who should do it? winlogon or gina? */
 232         /* FIXME: reverting to lower privileges after creating user shell? */
 233         RtlAdjustPrivilege(SE_ASSIGNPRIMARYTOKEN_PRIVILEGE, TRUE, FALSE, &Old);
 234
 235         if (!Session->Gina.Functions.WlxActivateUserShell(
 236                 Session->Gina.Context,
 237                 L"Default",
 238                 NULL, /* FIXME */
 239                 lpEnvironment))
 240         {
 241                 //WCHAR StatusMsg[256];
 242                 WARN("WL: WlxActivateUserShell() failed\n");
 243                 //LoadStringW(hAppInstance, IDS_FAILEDACTIVATEUSERSHELL, StatusMsg, sizeof(StatusMsg));
 244                 //MessageBoxW(0, StatusMsg, NULL, MB_ICONERROR);
 245                 goto cleanup;
 246         }
 247
 248         if (!InitializeScreenSaver(Session))
 249                 WARN("WL: Failed to initialize screen saver\n");
 250
 251         Session->hProfileInfo = ProfileInfo.hProfile;
 252         ret = TRUE;
 253
 254 cleanup:
 255         if (Session->Profile)
 256         {
 257                 HeapFree(GetProcessHeap(), 0, Session->Profile->pszProfile);
 258                 HeapFree(GetProcessHeap(), 0, Session->Profile);
 259         }
 260         Session->Profile = NULL;
 261         if (!ret
 262          && ProfileInfo.hProfile != INVALID_HANDLE_VALUE)
 263         {
 264                 UnloadUserProfile(WLSession->UserToken, ProfileInfo.hProfile);
 265         }
 266         if (lpEnvironment)
 267                 DestroyEnvironmentBlock(lpEnvironment);
 268         RemoveStatusMessage(Session);
 269         if (!ret)
 270         {
 271                 CloseHandle(Session->UserToken);
 272                 Session->UserToken = NULL;
 273         }
 274         return ret;
 275 }
 276
 277 #define EWX_ACTION_MASK 0xffffffeb
 278 #define EWX_FLAGS_MASK  0x00000014
 279
 280 typedef struct tagLOGOFF_SHUTDOWN_DATA
 281 {
 282   UINT Flags;
 283   PWLSESSION Session;
 284 } LOGOFF_SHUTDOWN_DATA, *PLOGOFF_SHUTDOWN_DATA;
 285
 286 static DWORD WINAPI
 287 LogoffShutdownThread(LPVOID Parameter)
 288 {
 289         PLOGOFF_SHUTDOWN_DATA LSData = (PLOGOFF_SHUTDOWN_DATA)Parameter;
 290
 291         if (LSData->Session->UserToken != NULL && !ImpersonateLoggedOnUser(LSData->Session->UserToken))
 292         {
 293                 ERR("ImpersonateLoggedOnUser() failed with error %lu\n", GetLastError());
 294                 return 0;
 295         }
 296
 297         /* Close processes of the interactive user */
 298         if (!ExitWindowsEx(
 299                 EWX_INTERNAL_KILL_USER_APPS | (LSData->Flags & EWX_FLAGS_MASK) |
 300                 (EWX_LOGOFF == (LSData->Flags & EWX_ACTION_MASK) ? EWX_INTERNAL_FLAG_LOGOFF : 0),
 301                 0))
 302         {
 303                 ERR("Unable to kill user apps, error %lu\n", GetLastError());
 304                 RevertToSelf();
 305                 return 0;
 306         }
 307
 308         /* FIXME: Call ExitWindowsEx() to terminate COM processes */
 309
 310         if (LSData->Session->UserToken)
 311                 RevertToSelf();
 312
 313         return 1;
 314 }
 315
 316
 317 static NTSTATUS
 318 CreateLogoffSecurityAttributes(
 319         OUT PSECURITY_ATTRIBUTES* ppsa)
 320 {
 321         /* The following code is not working yet and messy */
 322         /* Still, it gives some ideas about data types and functions involved and */
 323         /* required to set up a SECURITY_DESCRIPTOR for a SECURITY_ATTRIBUTES */
 324         /* instance for a thread, to allow that  thread to ImpersonateLoggedOnUser(). */
 325         /* Specifically THREAD_SET_THREAD_TOKEN is required. */
 326         PSECURITY_DESCRIPTOR SecurityDescriptor = NULL;
 327         PSECURITY_ATTRIBUTES psa = 0;
 328         BYTE* pMem;
 329         PACL pACL;
 330         EXPLICIT_ACCESS Access;
 331         PSID pEveryoneSID = NULL;
 332         static SID_IDENTIFIER_AUTHORITY WorldAuthority = { SECURITY_WORLD_SID_AUTHORITY };
 333
 334         *ppsa = NULL;
 335
 336         // Let's first try to enumerate what kind of data we need for this to ever work:
 337         // 1.  The Winlogon SID, to be able to give it THREAD_SET_THREAD_TOKEN.
 338         // 2.  The users SID (the user trying to logoff, or rather shut down the system).
 339         // 3.  At least two EXPLICIT_ACCESS instances:
 340         // 3.1 One for Winlogon itself, giving it the rights
 341         //     required to THREAD_SET_THREAD_TOKEN (as it's needed to successfully call
 342         //     ImpersonateLoggedOnUser).
 343         // 3.2 One for the user, to allow *that* thread to perform its work.
 344         // 4.  An ACL to hold the these EXPLICIT_ACCESS ACE's.
 345         // 5.  A SECURITY_DESCRIPTOR to hold the ACL, and finally.
 346         // 6.  A SECURITY_ATTRIBUTES instance to pull all of this required stuff
 347         //     together, to hand it to CreateThread.
 348         //
 349         // However, it seems struct LOGOFF_SHUTDOWN_DATA doesn't contain
 350         // these required SID's, why they'd have to be added.
 351         // The Winlogon's own SID should probably only be created once,
 352         // while the user's SID obviously must be created for each new user.
 353         // Might as well store it when the user logs on?
 354
 355         if(!AllocateAndInitializeSid(&WorldAuthority,
 356                                      1,
 357                                      SECURITY_WORLD_RID,
 358                                      0, 0, 0, 0, 0, 0, 0,
 359                                      &pEveryoneSID))
 360         {
 361                 ERR("Failed to initialize security descriptor for logoff thread!\n");
 362                 return STATUS_UNSUCCESSFUL;
 363         }
 364
 365         /* set up the required security attributes to be able to shut down */
 366         /* To save space and time, allocate a single block of memory holding */
 367         /* both SECURITY_ATTRIBUTES and SECURITY_DESCRIPTOR */
 368         pMem = HeapAlloc(GetProcessHeap(),
 369                          0,
 370                          sizeof(SECURITY_ATTRIBUTES) +
 371                          SECURITY_DESCRIPTOR_MIN_LENGTH +
 372                          sizeof(ACL));
 373         if (!pMem)
 374         {
 375                 ERR("Failed to allocate memory for logoff security descriptor!\n");
 376                 return STATUS_NO_MEMORY;
 377         }
 378
 379         /* Note that the security descriptor needs to be in _absolute_ format, */
 380         /* meaning its members must be pointers to other structures, rather */
 381         /* than the relative format using offsets */
 382         psa = (PSECURITY_ATTRIBUTES)pMem;
 383         SecurityDescriptor = (PSECURITY_DESCRIPTOR)(pMem + sizeof(SECURITY_ATTRIBUTES));
 384         pACL = (PACL)(((PBYTE)SecurityDescriptor) + SECURITY_DESCRIPTOR_MIN_LENGTH);
 385
 386         // Initialize an EXPLICIT_ACCESS structure for an ACE.
 387         // The ACE will allow this thread to log off (and shut down the system, currently).
 388         ZeroMemory(&Access, sizeof(Access));
 389         Access.grfAccessPermissions = THREAD_SET_THREAD_TOKEN;
 390         Access.grfAccessMode = SET_ACCESS; // GRANT_ACCESS?
 391         Access.grfInheritance = NO_INHERITANCE;
 392         Access.Trustee.TrusteeForm = TRUSTEE_IS_SID;
 393         Access.Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
 394         Access.Trustee.ptstrName = pEveryoneSID;
 395
 396         if (SetEntriesInAcl(1, &Access, NULL, &pACL) != ERROR_SUCCESS)
 397         {
 398                 ERR("Failed to set Access Rights for logoff thread. Logging out will most likely fail.\n");
 399
 400                 HeapFree(GetProcessHeap(), 0, pMem);
 401                 return STATUS_UNSUCCESSFUL;
 402         }
 403
 404         if (!InitializeSecurityDescriptor(SecurityDescriptor, SECURITY_DESCRIPTOR_REVISION))
 405         {
 406                 ERR("Failed to initialize security descriptor for logoff thread!\n");
 407                 HeapFree(GetProcessHeap(), 0, pMem);
 408                 return STATUS_UNSUCCESSFUL;
 409         }
 410
 411         if (!SetSecurityDescriptorDacl(SecurityDescriptor,
 412                                        TRUE,     // bDaclPresent flag
 413                                        pACL,
 414                                        FALSE))   // not a default DACL
 415         {
 416                 ERR("SetSecurityDescriptorDacl Error %lu\n", GetLastError());
 417                 HeapFree(GetProcessHeap(), 0, pMem);
 418                 return STATUS_UNSUCCESSFUL;
 419         }
 420
 421         psa->nLength = sizeof(SECURITY_ATTRIBUTES);
 422         psa->lpSecurityDescriptor = SecurityDescriptor;
 423         psa->bInheritHandle = FALSE;
 424
 425         *ppsa = psa;
 426
 427         return STATUS_SUCCESS;
 428 }
 429
 430 static VOID
 431 DestroyLogoffSecurityAttributes(
 432         IN PSECURITY_ATTRIBUTES psa)
 433 {
 434         if (psa)
 435         {
 436                 HeapFree(GetProcessHeap(), 0, psa);
 437         }
 438 }
 439
 440
 441 static NTSTATUS
 442 HandleLogoff(
 443         IN OUT PWLSESSION Session,
 444         IN UINT Flags)
 445 {
 446         PLOGOFF_SHUTDOWN_DATA LSData;
 447         PSECURITY_ATTRIBUTES psa;
 448         HANDLE hThread;
 449         DWORD exitCode;
 450         NTSTATUS Status;
 451
 452         DisplayStatusMessage(Session, Session->WinlogonDesktop, IDS_SAVEYOURSETTINGS);
 453
 454         /* Prepare data for logoff thread */
 455         LSData = HeapAlloc(GetProcessHeap(), 0, sizeof(LOGOFF_SHUTDOWN_DATA));
 456         if (!LSData)
 457         {
 458                 ERR("Failed to allocate mem for thread data\n");
 459                 return STATUS_NO_MEMORY;
 460         }
 461         LSData->Flags = Flags;
 462         LSData->Session = Session;
 463
 464         Status = CreateLogoffSecurityAttributes(&psa);
 465         if (!NT_SUCCESS(Status))
 466         {
 467                 ERR("Failed to create a required security descriptor. Status 0x%08lx\n", Status);
 468                 HeapFree(GetProcessHeap(), 0, LSData);
 469                 return Status;
 470         }
 471
 472         /* Run logoff thread */
 473         hThread = CreateThread(psa, 0, LogoffShutdownThread, (LPVOID)LSData, 0, NULL);
 474
 475         /* we're done with the SECURITY_DESCRIPTOR */
 476         DestroyLogoffSecurityAttributes(psa);
 477         psa = NULL;
 478
 479         if (!hThread)
 480         {
 481                 ERR("Unable to create logoff thread, error %lu\n", GetLastError());
 482                 HeapFree(GetProcessHeap(), 0, LSData);
 483                 return STATUS_UNSUCCESSFUL;
 484         }
 485         WaitForSingleObject(hThread, INFINITE);
 486         HeapFree(GetProcessHeap(), 0, LSData);
 487         if (!GetExitCodeThread(hThread, &exitCode))
 488         {
 489                 ERR("Unable to get exit code of logoff thread (error %lu)\n", GetLastError());
 490                 CloseHandle(hThread);
 491                 return STATUS_UNSUCCESSFUL;
 492         }
 493         CloseHandle(hThread);
 494         if (exitCode == 0)
 495         {
 496                 ERR("Logoff thread returned failure\n");
 497                 return STATUS_UNSUCCESSFUL;
 498         }
 499
 500         UnloadUserProfile(Session->UserToken, Session->hProfileInfo);
 501         CloseHandle(Session->UserToken);
 502         UpdatePerUserSystemParameters(0, FALSE);
 503         Session->LogonStatus = WKSTA_IS_LOGGED_OFF;
 504         Session->UserToken = NULL;
 505         return STATUS_SUCCESS;
 506 }
 507
 508 static BOOL CALLBACK
 509 ShutdownComputerWindowProc(
 510         IN HWND hwndDlg,
 511         IN UINT uMsg,
 512         IN WPARAM wParam,
 513         IN LPARAM lParam)
 514 {
 515         UNREFERENCED_PARAMETER(lParam);
 516
 517         switch (uMsg)
 518         {
 519                 case WM_COMMAND:
 520                 {
 521                         switch (LOWORD(wParam))
 522                         {
 523                                 case IDC_BTNSHTDOWNCOMPUTER:
 524                                         EndDialog(hwndDlg, IDC_BTNSHTDOWNCOMPUTER);
 525                                         return TRUE;
 526                         }
 527                         break;
 528                 }
 529                 case WM_INITDIALOG:
 530                 {
 531                         RemoveMenu(GetSystemMenu(hwndDlg, FALSE), SC_CLOSE, MF_BYCOMMAND);
 532                         SetFocus(GetDlgItem(hwndDlg, IDC_BTNSHTDOWNCOMPUTER));
 533                         return TRUE;
 534                 }
 535         }
 536         return FALSE;
 537 }
 538
 539 static VOID
 540 UninitializeSAS(
 541         IN OUT PWLSESSION Session)
 542 {
 543         if (Session->SASWindow)
 544         {
 545                 DestroyWindow(Session->SASWindow);
 546                 Session->SASWindow = NULL;
 547         }
 548         if (Session->hEndOfScreenSaverThread)
 549                 SetEvent(Session->hEndOfScreenSaverThread);
 550         UnregisterClassW(WINLOGON_SAS_CLASS, hAppInstance);
 551 }
 552
 553 NTSTATUS
 554 HandleShutdown(
 555         IN OUT PWLSESSION Session,
 556         IN DWORD wlxAction)
 557 {
 558         PLOGOFF_SHUTDOWN_DATA LSData;
 559         HANDLE hThread;
 560         DWORD exitCode;
 561
 562         DisplayStatusMessage(Session, Session->WinlogonDesktop, IDS_REACTOSISSHUTTINGDOWN);
 563
 564         /* Prepare data for shutdown thread */
 565         LSData = HeapAlloc(GetProcessHeap(), 0, sizeof(LOGOFF_SHUTDOWN_DATA));
 566         if (!LSData)
 567         {
 568                 ERR("Failed to allocate mem for thread data\n");
 569                 return STATUS_NO_MEMORY;
 570         }
 571         if (wlxAction == WLX_SAS_ACTION_SHUTDOWN_POWER_OFF)
 572                 LSData->Flags = EWX_POWEROFF;
 573         else if (wlxAction == WLX_SAS_ACTION_SHUTDOWN_REBOOT)
 574                 LSData->Flags = EWX_REBOOT;
 575         else
 576                 LSData->Flags = EWX_SHUTDOWN;
 577         LSData->Session = Session;
 578
 579         /* Run shutdown thread */
 580         hThread = CreateThread(NULL, 0, LogoffShutdownThread, (LPVOID)LSData, 0, NULL);
 581         if (!hThread)
 582         {
 583                 ERR("Unable to create shutdown thread, error %lu\n", GetLastError());
 584                 HeapFree(GetProcessHeap(), 0, LSData);
 585                 return STATUS_UNSUCCESSFUL;
 586         }
 587         WaitForSingleObject(hThread, INFINITE);
 588         HeapFree(GetProcessHeap(), 0, LSData);
 589         if (!GetExitCodeThread(hThread, &exitCode))
 590         {
 591                 ERR("Unable to get exit code of shutdown thread (error %lu)\n", GetLastError());
 592                 CloseHandle(hThread);
 593                 return STATUS_UNSUCCESSFUL;
 594         }
 595         CloseHandle(hThread);
 596         if (exitCode == 0)
 597         {
 598                 ERR("Shutdown thread returned failure\n");
 599                 return STATUS_UNSUCCESSFUL;
 600         }
 601
 602         /* Destroy SAS window */
 603         UninitializeSAS(Session);
 604
 605         FIXME("FIXME: Call SMSS API #1\n");
 606         if (wlxAction == WLX_SAS_ACTION_SHUTDOWN_REBOOT)
 607                 NtShutdownSystem(ShutdownReboot);
 608         else
 609         {
 610                 if (FALSE)
 611                 {
 612                         /* FIXME - only show this dialog if it's a shutdown and the computer doesn't support APM */
 613                         DialogBox(hAppInstance, MAKEINTRESOURCE(IDD_SHUTDOWNCOMPUTER), GetDesktopWindow(), ShutdownComputerWindowProc);
 614                 }
 615                 NtShutdownSystem(ShutdownNoReboot);
 616         }
 617         return STATUS_SUCCESS;
 618 }
 619
 620 static VOID
 621 DoGenericAction(
 622         IN OUT PWLSESSION Session,
 623         IN DWORD wlxAction)
 624 {
 625         switch (wlxAction)
 626         {
 627                 case WLX_SAS_ACTION_LOGON: /* 0x01 */
 628                         if (HandleLogon(Session))
 629                         {
 630                                 SwitchDesktop(Session->ApplicationDesktop);
 631                                 Session->LogonStatus = WKSTA_IS_LOGGED_ON;
 632                         }
 633                         else
 634                                 Session->Gina.Functions.WlxDisplaySASNotice(Session->Gina.Context);
 635                         break;
 636                 case WLX_SAS_ACTION_NONE: /* 0x02 */
 637                         break;
 638                 case WLX_SAS_ACTION_LOCK_WKSTA: /* 0x03 */
 639                         if (Session->Gina.Functions.WlxIsLockOk(Session->Gina.Context))
 640                         {
 641                                 SwitchDesktop(WLSession->WinlogonDesktop);
 642                                 Session->LogonStatus = WKSTA_IS_LOCKED;
 643                                 Session->Gina.Functions.WlxDisplayLockedNotice(Session->Gina.Context);
 644                         }
 645                         break;
 646                 case WLX_SAS_ACTION_LOGOFF: /* 0x04 */
 647                 case WLX_SAS_ACTION_SHUTDOWN: /* 0x05 */
 648                 case WLX_SAS_ACTION_SHUTDOWN_POWER_OFF: /* 0x0a */
 649                 case WLX_SAS_ACTION_SHUTDOWN_REBOOT: /* 0x0b */
 650                         if (Session->LogonStatus != WKSTA_IS_LOGGED_OFF)
 651                         {
 652                                 if (!Session->Gina.Functions.WlxIsLogoffOk(Session->Gina.Context))
 653                                         break;
 654                                 SwitchDesktop(WLSession->WinlogonDesktop);
 655                                 Session->Gina.Functions.WlxLogoff(Session->Gina.Context);
 656                                 if (!NT_SUCCESS(HandleLogoff(Session, EWX_LOGOFF)))
 657                                 {
 658                                         RemoveStatusMessage(Session);
 659                                         break;
 660                                 }
 661                         }
 662                         if (WLX_SHUTTINGDOWN(wlxAction))
 663                         {
 664                                 Session->Gina.Functions.WlxShutdown(Session->Gina.Context, wlxAction);
 665                                 if (!NT_SUCCESS(HandleShutdown(Session, wlxAction)))
 666                                 {
 667                                         RemoveStatusMessage(Session);
 668                                         Session->Gina.Functions.WlxDisplaySASNotice(Session->Gina.Context);
 669                                 }
 670                         }
 671                         else
 672                         {
 673                                 RemoveStatusMessage(Session);
 674                                 Session->Gina.Functions.WlxDisplaySASNotice(Session->Gina.Context);
 675                         }
 676                         break;
 677                 case WLX_SAS_ACTION_TASKLIST: /* 0x07 */
 678                         SwitchDesktop(WLSession->ApplicationDesktop);
 679                         StartTaskManager(Session);
 680                         break;
 681                 case WLX_SAS_ACTION_UNLOCK_WKSTA: /* 0x08 */
 682                         SwitchDesktop(WLSession->ApplicationDesktop);
 683                         Session->LogonStatus = WKSTA_IS_LOGGED_ON;
 684                         break;
 685                 default:
 686                         WARN("Unknown SAS action 0x%lx\n", wlxAction);
 687         }
 688 }
 689
 690 static VOID
 691 DispatchSAS(
 692         IN OUT PWLSESSION Session,
 693         IN DWORD dwSasType)
 694 {
 695         DWORD wlxAction = WLX_SAS_ACTION_NONE;
 696
 697         if (Session->LogonStatus == WKSTA_IS_LOGGED_ON)
 698                 wlxAction = (DWORD)Session->Gina.Functions.WlxLoggedOnSAS(Session->Gina.Context, dwSasType, NULL);
 699         else if (Session->LogonStatus == WKSTA_IS_LOCKED)
 700                 wlxAction = (DWORD)Session->Gina.Functions.WlxWkstaLockedSAS(Session->Gina.Context, dwSasType);
 701         else
 702         {
 703                 /* Display a new dialog (if necessary) */
 704                 switch (dwSasType)
 705                 {
 706                         case WLX_SAS_TYPE_TIMEOUT: /* 0x00 */
 707                         {
 708                                 Session->Gina.Functions.WlxDisplaySASNotice(Session->Gina.Context);
 709                                 break;
 710                         }
 711                         default:
 712                         {
 713                                 PSID LogonSid = NULL; /* FIXME */
 714
 715                                 Session->Options = 0;
 716
 717                                 wlxAction = (DWORD)Session->Gina.Functions.WlxLoggedOutSAS(
 718                                         Session->Gina.Context,
 719                                         Session->SASAction,
 720                                         &Session->LogonId,
 721                                         LogonSid,
 722                                         &Session->Options,
 723                                         &Session->UserToken,
 724                                         &Session->MprNotifyInfo,
 725                                         (PVOID*)&Session->Profile);
 726                                 break;
 727                         }
 728                 }
 729         }
 730
 731         if (dwSasType == WLX_SAS_TYPE_SCRNSVR_TIMEOUT)
 732         {
 733                 BOOL bSecure = TRUE;
 734                 if (!Session->Gina.Functions.WlxScreenSaverNotify(Session->Gina.Context, &bSecure))
 735                 {
 736                         /* Skip start of screen saver */
 737                         SetEvent(Session->hEndOfScreenSaver);
 738                 }
 739                 else
 740                 {
 741                         if (bSecure)
 742                                 DoGenericAction(Session, WLX_SAS_ACTION_LOCK_WKSTA);
 743                         StartScreenSaver(Session);
 744                 }
 745         }
 746         else if (dwSasType == WLX_SAS_TYPE_SCRNSVR_ACTIVITY)
 747                 SetEvent(Session->hUserActivity);
 748
 749         DoGenericAction(Session, wlxAction);
 750 }
 751
 752 static BOOL
 753 RegisterHotKeys(
 754         IN PWLSESSION Session,
 755         IN HWND hwndSAS)
 756 {
 757         /* Register Ctrl+Alt+Del Hotkey */
 758         if (!RegisterHotKey(hwndSAS, HK_CTRL_ALT_DEL, MOD_CONTROL | MOD_ALT, VK_DELETE))
 759         {
 760                 ERR("WL: Unable to register Ctrl+Alt+Del hotkey!\n");
 761                 return FALSE;
 762         }
 763
 764         /* Register Ctrl+Shift+Esc (optional) */
 765         Session->TaskManHotkey = RegisterHotKey(hwndSAS, HK_CTRL_SHIFT_ESC, MOD_CONTROL | MOD_SHIFT, VK_ESCAPE);
 766         if (!Session->TaskManHotkey)
 767                 WARN("WL: Warning: Unable to register Ctrl+Alt+Esc hotkey!\n");
 768         return TRUE;
 769 }
 770
 771 static BOOL
 772 UnregisterHotKeys(
 773         IN PWLSESSION Session,
 774         IN HWND hwndSAS)
 775 {
 776         /* Unregister hotkeys */
 777         UnregisterHotKey(hwndSAS, HK_CTRL_ALT_DEL);
 778
 779         if (Session->TaskManHotkey)
 780                 UnregisterHotKey(hwndSAS, HK_CTRL_SHIFT_ESC);
 781
 782         return TRUE;
 783 }
 784
 785 static NTSTATUS
 786 CheckForShutdownPrivilege(
 787         IN DWORD RequestingProcessId)
 788 {
 789         HANDLE Process;
 790         HANDLE Token;
 791         BOOL CheckResult;
 792         PPRIVILEGE_SET PrivSet;
 793
 794         TRACE("CheckForShutdownPrivilege()\n");
 795
 796         Process = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, RequestingProcessId);
 797         if (!Process)
 798         {
 799                 WARN("OpenProcess() failed with error %lu\n", GetLastError());
 800                 return STATUS_INVALID_HANDLE;
 801         }
 802         if (!OpenProcessToken(Process, TOKEN_QUERY, &Token))
 803         {
 804                 WARN("OpenProcessToken() failed with error %lu\n", GetLastError());
 805                 CloseHandle(Process);
 806                 return STATUS_INVALID_HANDLE;
 807         }
 808         CloseHandle(Process);
 809         PrivSet = HeapAlloc(GetProcessHeap(), 0, sizeof(PRIVILEGE_SET) + sizeof(LUID_AND_ATTRIBUTES));
 810         if (!PrivSet)
 811         {
 812                 ERR("Failed to allocate mem for privilege set\n");
 813                 CloseHandle(Token);
 814                 return STATUS_NO_MEMORY;
 815         }
 816         PrivSet->PrivilegeCount = 1;
 817         PrivSet->Control = PRIVILEGE_SET_ALL_NECESSARY;
 818         if (!LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, &PrivSet->Privilege[0].Luid))
 819         {
 820                 WARN("LookupPrivilegeValue() failed with error %lu\n", GetLastError());
 821                 HeapFree(GetProcessHeap(), 0, PrivSet);
 822                 CloseHandle(Token);
 823                 return STATUS_UNSUCCESSFUL;
 824         }
 825         if (!PrivilegeCheck(Token, PrivSet, &CheckResult))
 826         {
 827                 WARN("PrivilegeCheck() failed with error %lu\n", GetLastError());
 828                 HeapFree(GetProcessHeap(), 0, PrivSet);
 829                 CloseHandle(Token);
 830                 return STATUS_ACCESS_DENIED;
 831         }
 832         HeapFree(GetProcessHeap(), 0, PrivSet);
 833         CloseHandle(Token);
 834
 835         if (!CheckResult)
 836         {
 837                 WARN("SE_SHUTDOWN privilege not enabled\n");
 838                 return STATUS_ACCESS_DENIED;
 839         }
 840         return STATUS_SUCCESS;
 841 }
 842
 843 static LRESULT CALLBACK
 844 SASWindowProc(
 845         IN HWND hwndDlg,
 846         IN UINT uMsg,
 847         IN WPARAM wParam,
 848         IN LPARAM lParam)
 849 {
 850         PWLSESSION Session = (PWLSESSION)GetWindowLongPtr(hwndDlg, GWLP_USERDATA);
 851
 852         switch (uMsg)
 853         {
 854                 case WM_HOTKEY:
 855                 {
 856                         switch (lParam)
 857                         {
 858                                 case MAKELONG(MOD_CONTROL | MOD_ALT, VK_DELETE):
 859                                 {
 860                                         TRACE("SAS: CONTROL+ALT+DELETE\n");
 861                                         if (!Session->Gina.UseCtrlAltDelete)
 862                                                 break;
 863                                         PostMessageW(Session->SASWindow, WLX_WM_SAS, WLX_SAS_TYPE_CTRL_ALT_DEL, 0);
 864                                         return TRUE;
 865                                 }
 866                                 case MAKELONG(MOD_CONTROL | MOD_SHIFT, VK_ESCAPE):
 867                                 {
 868                                         TRACE("SAS: CONTROL+SHIFT+ESCAPE\n");
 869                                         DoGenericAction(Session, WLX_SAS_ACTION_TASKLIST);
 870                                         return TRUE;
 871                                 }
 872                         }
 873                         break;
 874                 }
 875                 case WM_CREATE:
 876                 {
 877                         /* Get the session pointer from the create data */
 878                         Session = (PWLSESSION)((LPCREATESTRUCT)lParam)->lpCreateParams;
 879
 880                         /* Save the Session pointer */
 881                         SetWindowLongPtrW(hwndDlg, GWLP_USERDATA, (LONG_PTR)Session);
 882                         if (GetSetupType())
 883                                 return TRUE;
 884                         return RegisterHotKeys(Session, hwndDlg);
 885                 }
 886                 case WM_DESTROY:
 887                 {
 888                         if (!GetSetupType())
 889                             UnregisterHotKeys(Session, hwndDlg);
 890                         return TRUE;
 891                 }
 892                 case WM_SETTINGCHANGE:
 893                 {
 894                         UINT uiAction = (UINT)wParam;
 895                         if (uiAction == SPI_SETSCREENSAVETIMEOUT
 896                          || uiAction == SPI_SETSCREENSAVEACTIVE)
 897                         {
 898                                 SetEvent(Session->hScreenSaverParametersChanged);
 899                         }
 900                         return TRUE;
 901                 }
 902                 case WLX_WM_SAS:
 903                 {
 904                         DispatchSAS(Session, (DWORD)wParam);
 905                         return TRUE;
 906                 }
 907                 case PM_WINLOGON_EXITWINDOWS:
 908                 {
 909                         UINT Flags = (UINT)lParam;
 910                         UINT Action = Flags & EWX_ACTION_MASK;
 911                         DWORD wlxAction;
 912
 913                         /* Check parameters */
 914                         switch (Action)
 915                         {
 916                                 case EWX_LOGOFF: wlxAction = WLX_SAS_ACTION_LOGOFF; break;
 917                                 case EWX_SHUTDOWN: wlxAction = WLX_SAS_ACTION_SHUTDOWN; break;
 918                                 case EWX_REBOOT: wlxAction = WLX_SAS_ACTION_SHUTDOWN_REBOOT; break;
 919                                 case EWX_POWEROFF: wlxAction = WLX_SAS_ACTION_SHUTDOWN_POWER_OFF; break;
 920                                 default:
 921                                 {
 922                                         ERR("Invalid ExitWindows action 0x%x\n", Action);
 923                                         return STATUS_INVALID_PARAMETER;
 924                                 }
 925                         }
 926
 927                         if (WLX_SHUTTINGDOWN(wlxAction))
 928                         {
 929                                 NTSTATUS Status = CheckForShutdownPrivilege((DWORD)wParam);
 930                                 if (!NT_SUCCESS(Status))
 931                                         return Status;
 932                         }
 933                         DoGenericAction(Session, wlxAction);
 934                         return 1;
 935                 }
 936         }
 937
 938         return DefWindowProc(hwndDlg, uMsg, wParam, lParam);
 939 }
 940
 941 BOOL
 942 InitializeSAS(
 943         IN OUT PWLSESSION Session)
 944 {
 945         WNDCLASSEXW swc;
 946         BOOL ret = FALSE;
 947
 948         if (!SwitchDesktop(Session->WinlogonDesktop))
 949         {
 950                 ERR("WL: Failed to switch to winlogon desktop\n");
 951                 goto cleanup;
 952         }
 953
 954         /* Register SAS window class */
 955         swc.cbSize = sizeof(WNDCLASSEXW);
 956         swc.style = CS_SAVEBITS;
 957         swc.lpfnWndProc = SASWindowProc;
 958         swc.cbClsExtra = 0;
 959         swc.cbWndExtra = 0;
 960         swc.hInstance = hAppInstance;
 961         swc.hIcon = NULL;
 962         swc.hCursor = NULL;
 963         swc.hbrBackground = NULL;
 964         swc.lpszMenuName = NULL;
 965         swc.lpszClassName = WINLOGON_SAS_CLASS;
 966         swc.hIconSm = NULL;
 967         if (RegisterClassExW(&swc) == 0)
 968         {
 969                 ERR("WL: Failed to register SAS window class\n");
 970                 goto cleanup;
 971         }
 972
 973         /* Create invisible SAS window */
 974         Session->SASWindow = CreateWindowExW(
 975                 0,
 976                 WINLOGON_SAS_CLASS,
 977                 WINLOGON_SAS_TITLE,
 978                 WS_POPUP,
 979                 0, 0, 0, 0, 0, 0,
 980                 hAppInstance, Session);
 981         if (!Session->SASWindow)
 982         {
 983                 ERR("WL: Failed to create SAS window\n");
 984                 goto cleanup;
 985         }
 986
 987         /* Register SAS window to receive SAS notifications */
 988         if (!SetLogonNotifyWindow(Session->SASWindow, Session->InteractiveWindowStation))
 989         {
 990                 ERR("WL: Failed to register SAS window\n");
 991                 goto cleanup;
 992         }
 993
 994         if (!SetDefaultLanguage(FALSE))
 995                 return FALSE;
 996
 997         ret = TRUE;
 998
 999 cleanup:
1000         if (!ret)
1001                 UninitializeSAS(Session);
1002         return ret;
1003 }