dlls/shell32/shpolicy.c

   1 /*
   2  * shpolicy.c - Data for shell/system policies.
   3  *
   4  * Copyright 1999 Ian Schmidt <ischmidt@cfl.rr.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * NOTES:
  21  *
  22  * Some of these policies can be tweaked via the System Policy
  23  * Editor which came with the Win95 Migration Guide, although
  24  * there doesn't appear to be an updated Win98 version that
  25  * would handle the many new policies introduced since then.
  26  * You could easily write one with the information in
  27  * this file...
  28  *
  29  * Up to date as of SHELL32 v5.00 (W2K)
  30  */
  31
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 #include "windef.h"
  36 #include "winerror.h"
  37 #include "winreg.h"
  38
  39 #include "shell32_main.h"
  40
  41 #include "wine/debug.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  44
  45 #define SHELL_NO_POLICY 0xffffffff
  46
  47 typedef struct tagPOLICYDAT
  48 {
  49   DWORD policy;          /* policy value passed to SHRestricted */
  50   LPCSTR appstr;         /* application str such as "Explorer" */
  51   LPCSTR keystr;         /* name of the actual registry key / policy */
  52   DWORD cache;           /* cached value or 0xffffffff for invalid */
  53 } POLICYDATA, *LPPOLICYDATA;
  54
  55 /* registry strings */
  56 static const CHAR strRegistryPolicyA[] = "Software\\Microsoft\\Windows\\CurrentVersion\\Policies";
  57 static const WCHAR strRegistryPolicyW[] = {'S','o','f','t','w','a','r','e','\\','M','i','c','r','o',
  58                                            's','o','f','t','\\','W','i','n','d','o','w','s','\\',
  59                                            'C','u','r','r','e','n','t','V','e','r','s','i','o','n',
  60                                            '\\','P','o','l','i','c','i','e','s',0};
  61 static const CHAR strPolicyA[] = "Policy";
  62 static const WCHAR strPolicyW[] = {'P','o','l','i','c','y',0};
  63
  64 /* application strings */
  65
  66 static const char strExplorer[] = {"Explorer"};
  67 static const char strActiveDesk[] = {"ActiveDesktop"};
  68 static const char strWinOldApp[] = {"WinOldApp"};
  69 static const char strAddRemoveProgs[] = {"AddRemoveProgs"};
  70
  71 /* key strings */
  72
  73 static const char strNoFileURL[] = {"NoFileUrl"};
  74 static const char strNoFolderOptions[] = {"NoFolderOptions"};
  75 static const char strNoChangeStartMenu[] = {"NoChangeStartMenu"};
  76 static const char strNoWindowsUpdate[] = {"NoWindowsUpdate"};
  77 static const char strNoSetActiveDesktop[] = {"NoSetActiveDesktop"};
  78 static const char strNoForgetSoftwareUpdate[] = {"NoForgetSoftwareUpdate"};
  79 static const char strNoMSAppLogo[] = {"NoMSAppLogo5ChannelNotify"};
  80 static const char strForceCopyACLW[] = {"ForceCopyACLWithFile"};
  81 static const char strNoResolveTrk[] = {"NoResolveTrack"};
  82 static const char strNoResolveSearch[] = {"NoResolveSearch"};
  83 static const char strNoEditComponent[] = {"NoEditingComponents"};
  84 static const char strNoMovingBand[] = {"NoMovingBands"};
  85 static const char strNoCloseDragDrop[] = {"NoCloseDragDropBands"};
  86 static const char strNoCloseComponent[] = {"NoClosingComponents"};
  87 static const char strNoDelComponent[] = {"NoDeletingComponents"};
  88 static const char strNoAddComponent[] = {"NoAddingComponents"};
  89 static const char strNoComponent[] = {"NoComponents"};
  90 static const char strNoChangeWallpaper[] = {"NoChangingWallpaper"};
  91 static const char strNoHTMLWallpaper[] = {"NoHTMLWallpaper"};
  92 static const char strNoCustomWebView[] = {"NoCustomizeWebView"};
  93 static const char strClassicShell[] = {"ClassicShell"};
  94 static const char strClearRecentDocs[] = {"ClearRecentDocsOnExit"};
  95 static const char strNoFavoritesMenu[] = {"NoFavoritesMenu"};
  96 static const char strNoActiveDesktopChanges[] = {"NoActiveDesktopChanges"};
  97 static const char strNoActiveDesktop[] = {"NoActiveDesktop"};
  98 static const char strNoRecentDocMenu[] = {"NoRecentDocsMenu"};
  99 static const char strNoRecentDocHistory[] = {"NoRecentDocsHistory"};
 100 static const char strNoInetIcon[] = {"NoInternetIcon"};
 101 static const char strNoStngsWizard[] = {"NoSettingsWizards"};
 102 static const char strNoLogoff[] = {"NoLogoff"};
 103 static const char strNoNetConDis[] = {"NoNetConnectDisconnect"};
 104 static const char strNoContextMenu[] = {"NoViewContextMenu"};
 105 static const char strNoTryContextMenu[] = {"NoTrayContextMenu"};
 106 static const char strNoWebMenu[] = {"NoWebMenu"};
 107 static const char strLnkResolveIgnoreLnkInfo[] = {"LinkResolveIgnoreLinkInfo"};
 108 static const char strNoCommonGroups[] = {"NoCommonGroups"};
 109 static const char strEnforceShlExtSecurity[] = {"EnforceShellExtensionSecurity"};
 110 static const char strNoRealMode[] = {"NoRealMode"};
 111 static const char strMyDocsOnNet[] = {"MyDocsOnNet"};
 112 static const char strNoStartMenuSubfolder[] = {"NoStartMenuSubFolders"};
 113 static const char strNoAddPrinters[] = {"NoAddPrinter"};
 114 static const char strNoDeletePrinters[] = {"NoDeletePrinter"};
 115 static const char strNoPrintTab[] = {"NoPrinterTabs"};
 116 static const char strRestrictRun[] = {"RestrictRun"};
 117 static const char strNoStartBanner[] = {"NoStartBanner"};
 118 static const char strNoNetworkNeighborhood[] = {"NoNetHood"};
 119 static const char strNoDriveTypeAtRun[] = {"NoDriveTypeAutoRun"};
 120 static const char strNoDrivesAutoRun[] = {"NoDriveAutoRun"};
 121 static const char strNoDrives[] = {"NoDrives"};
 122 static const char strNoFind[] = {"NoFind"};
 123 static const char strNoDesktop[] = {"NoDesktop"};
 124 static const char strNoSetTaskBar[] = {"NoSetTaskbar"};
 125 static const char strNoSetFld[] = {"NoSetFolders"};
 126 static const char strNoFileMenu[] = {"NoFileMenu"};
 127 static const char strNoSavSetng[] = {"NoSaveSettings"};
 128 static const char strNoClose[] = {"NoClose"};
 129 static const char strNoRun[] = {"NoRun"};
 130
 131 /* policy data array */
 132 POLICYDATA sh32_policy_table[] =
 133 {
 134   {
 135     0x1,
 136     strExplorer,
 137     strNoRun,
 138     SHELL_NO_POLICY
 139   },
 140   {
 141     0x2,
 142     strExplorer,
 143     strNoClose,
 144     SHELL_NO_POLICY
 145   },
 146   {
 147     0x4,
 148     strExplorer,
 149     strNoSavSetng,
 150     SHELL_NO_POLICY
 151   },
 152   {
 153     0x8,
 154     strExplorer,
 155     strNoFileMenu,
 156     SHELL_NO_POLICY
 157   },
 158   {
 159     0x10,
 160     strExplorer,
 161     strNoSetFld,
 162     SHELL_NO_POLICY
 163   },
 164   {
 165     0x20,
 166     strExplorer,
 167     strNoSetTaskBar,
 168     SHELL_NO_POLICY
 169   },
 170   {
 171     0x40,
 172     strExplorer,
 173     strNoDesktop,
 174     SHELL_NO_POLICY
 175   },
 176   {
 177     0x80,
 178     strExplorer,
 179     strNoFind,
 180     SHELL_NO_POLICY
 181   },
 182   {
 183     0x100,
 184     strExplorer,
 185     strNoDrives,
 186     SHELL_NO_POLICY
 187   },
 188   {
 189     0x200,
 190     strExplorer,
 191     strNoDrivesAutoRun,
 192     SHELL_NO_POLICY
 193   },
 194   {
 195     0x400,
 196     strExplorer,
 197     strNoDriveTypeAtRun,
 198     SHELL_NO_POLICY
 199   },
 200   {
 201     0x800,
 202     strExplorer,
 203     strNoNetworkNeighborhood,
 204     SHELL_NO_POLICY
 205   },
 206   {
 207     0x1000,
 208     strExplorer,
 209     strNoStartBanner,
 210     SHELL_NO_POLICY
 211   },
 212   {
 213     0x2000,
 214     strExplorer,
 215     strRestrictRun,
 216     SHELL_NO_POLICY
 217   },
 218   {
 219     0x4000,
 220     strExplorer,
 221     strNoPrintTab,
 222     SHELL_NO_POLICY
 223   },
 224   {
 225     0x8000,
 226     strExplorer,
 227     strNoDeletePrinters,
 228     SHELL_NO_POLICY
 229   },
 230   {
 231     0x10000,
 232     strExplorer,
 233     strNoAddPrinters,
 234     SHELL_NO_POLICY
 235   },
 236   {
 237     0x20000,
 238     strExplorer,
 239     strNoStartMenuSubfolder,
 240     SHELL_NO_POLICY
 241   },
 242   {
 243     0x40000,
 244     strExplorer,
 245     strMyDocsOnNet,
 246     SHELL_NO_POLICY
 247   },
 248   {
 249     0x80000,
 250     strWinOldApp,
 251     strNoRealMode,
 252     SHELL_NO_POLICY
 253   },
 254   {
 255     0x100000,
 256     strExplorer,
 257     strEnforceShlExtSecurity,
 258     SHELL_NO_POLICY
 259   },
 260   {
 261     0x200000,
 262     strExplorer,
 263     strLnkResolveIgnoreLnkInfo,
 264     SHELL_NO_POLICY
 265   },
 266   {
 267     0x400000,
 268     strExplorer,
 269     strNoCommonGroups,
 270     SHELL_NO_POLICY
 271   },
 272   {
 273     0x800000,
 274     strExplorer,
 275     "SeparateProcess",
 276     SHELL_NO_POLICY
 277   },
 278   {
 279     0x1000000,
 280     strExplorer,
 281     strNoWebMenu,
 282     SHELL_NO_POLICY
 283   },
 284   {
 285     0x2000000,
 286     strExplorer,
 287     strNoTryContextMenu,
 288     SHELL_NO_POLICY
 289   },
 290   {
 291     0x4000000,
 292     strExplorer,
 293     strNoContextMenu,
 294     SHELL_NO_POLICY
 295   },
 296   {
 297     0x8000000,
 298     strExplorer,
 299     strNoNetConDis,
 300     SHELL_NO_POLICY
 301   },
 302   {
 303     0x10000000,
 304     strExplorer,
 305     strNoLogoff,
 306     SHELL_NO_POLICY
 307   },
 308   {
 309     0x20000000,
 310     strExplorer,
 311     strNoStngsWizard,
 312     SHELL_NO_POLICY
 313   },
 314   {
 315     0x40000001,
 316     strExplorer,
 317     strNoInetIcon,
 318     SHELL_NO_POLICY
 319   },
 320   {
 321     0x40000002,
 322     strExplorer,
 323     strNoRecentDocHistory,
 324     SHELL_NO_POLICY
 325   },
 326   {
 327     0x40000003,
 328     strExplorer,
 329     strNoRecentDocMenu,
 330     SHELL_NO_POLICY
 331   },
 332   {
 333     0x40000004,
 334     strExplorer,
 335     strNoActiveDesktop,
 336     SHELL_NO_POLICY
 337   },
 338   {
 339     0x40000005,
 340     strExplorer,
 341     strNoActiveDesktopChanges,
 342     SHELL_NO_POLICY
 343   },
 344   {
 345     0x40000006,
 346     strExplorer,
 347     strNoFavoritesMenu,
 348     SHELL_NO_POLICY
 349   },
 350   {
 351     0x40000007,
 352     strExplorer,
 353     strClearRecentDocs,
 354     SHELL_NO_POLICY
 355   },
 356   {
 357     0x40000008,
 358     strExplorer,
 359     strClassicShell,
 360     SHELL_NO_POLICY
 361   },
 362   {
 363     0x40000009,
 364     strExplorer,
 365     strNoCustomWebView,
 366     SHELL_NO_POLICY
 367   },
 368   {
 369     0x40000010,
 370     strActiveDesk,
 371     strNoHTMLWallpaper,
 372     SHELL_NO_POLICY
 373   },
 374   {
 375     0x40000011,
 376     strActiveDesk,
 377     strNoChangeWallpaper,
 378     SHELL_NO_POLICY
 379   },
 380   {
 381     0x40000012,
 382     strActiveDesk,
 383     strNoComponent,
 384     SHELL_NO_POLICY
 385   },
 386   {
 387     0x40000013,
 388     strActiveDesk,
 389     strNoAddComponent,
 390     SHELL_NO_POLICY
 391   },
 392   {
 393     0x40000014,
 394     strActiveDesk,
 395     strNoDelComponent,
 396     SHELL_NO_POLICY
 397   },
 398   {
 399     0x40000015,
 400     strActiveDesk,
 401     strNoCloseComponent,
 402     SHELL_NO_POLICY
 403   },
 404   {
 405     0x40000016,
 406     strActiveDesk,
 407     strNoCloseDragDrop,
 408     SHELL_NO_POLICY
 409   },
 410   {
 411     0x40000017,
 412     strActiveDesk,
 413     strNoMovingBand,
 414     SHELL_NO_POLICY
 415   },
 416   {
 417     0x40000018,
 418     strActiveDesk,
 419     strNoEditComponent,
 420     SHELL_NO_POLICY
 421   },
 422   {
 423     0x40000019,
 424     strExplorer,
 425     strNoResolveSearch,
 426     SHELL_NO_POLICY
 427   },
 428   {
 429     0x4000001a,
 430     strExplorer,
 431     strNoResolveTrk,
 432     SHELL_NO_POLICY
 433   },
 434   {
 435     0x4000001b,
 436     strExplorer,
 437     strForceCopyACLW,
 438     SHELL_NO_POLICY
 439   },
 440   {
 441     0x4000001c,
 442     strExplorer,
 443     strNoMSAppLogo,
 444     SHELL_NO_POLICY
 445   },
 446   {
 447     0x4000001d,
 448     strExplorer,
 449     strNoForgetSoftwareUpdate,
 450     SHELL_NO_POLICY
 451   },
 452   {
 453     0x4000001e,
 454     strExplorer,
 455     strNoSetActiveDesktop,
 456     SHELL_NO_POLICY
 457   },
 458   {
 459     0x4000001f,
 460     strExplorer,
 461     strNoWindowsUpdate,
 462     SHELL_NO_POLICY
 463   },
 464   {
 465     0x40000020,
 466     strExplorer,
 467     strNoChangeStartMenu,
 468     SHELL_NO_POLICY
 469   },
 470   {
 471     0x40000021,
 472     strExplorer,
 473     strNoFolderOptions,
 474     SHELL_NO_POLICY
 475   },
 476   {
 477     0x50000024,
 478     strExplorer,
 479     strNoFileURL,
 480     SHELL_NO_POLICY
 481   },
 482   {
 483     0x40000022,
 484     strExplorer,
 485     "FindComputers",
 486     SHELL_NO_POLICY
 487   },
 488   {
 489     0x40000023,
 490     strExplorer,
 491     "IntelliMenus",
 492     SHELL_NO_POLICY
 493   },
 494   {
 495     0x40000024,
 496     strExplorer,
 497     "MemCheckBoxInRunDlg",
 498     SHELL_NO_POLICY
 499   },
 500   {
 501     0x40000025,
 502     strAddRemoveProgs,
 503     "ShowPostSetup",
 504     SHELL_NO_POLICY
 505   },
 506   {
 507     0x40000026,
 508     strExplorer,
 509     "NoSyncAll",
 510     SHELL_NO_POLICY
 511   },
 512   {
 513     0x40000027,
 514     strExplorer,
 515     "NoControlPanel",
 516     SHELL_NO_POLICY
 517   },
 518   {
 519     0x40000028,
 520     strExplorer,
 521     "EnumWorkgroup",
 522     SHELL_NO_POLICY
 523   },
 524   {
 525     0x40000029,
 526     strAddRemoveProgs,
 527     "NoAddRemovePrograms",
 528     SHELL_NO_POLICY
 529   },
 530   {
 531     0x4000002A,
 532     strAddRemoveProgs,
 533     "NoRemovePage",
 534     SHELL_NO_POLICY
 535   },
 536   {
 537     0x4000002B,
 538     strAddRemoveProgs,
 539     "NoAddPage",
 540     SHELL_NO_POLICY
 541   },
 542   {
 543     0x4000002C,
 544     strAddRemoveProgs,
 545     "NoWindowsSetupPage",
 546     SHELL_NO_POLICY
 547   },
 548   {
 549     0x4000002E,
 550     strExplorer,
 551     "NoChangeMappedDriveLabel",
 552     SHELL_NO_POLICY
 553   },
 554   {
 555     0x4000002F,
 556     strExplorer,
 557     "NoChangeMappedDriveComment",
 558     SHELL_NO_POLICY
 559   },
 560   {
 561     0x40000030,
 562     strExplorer,
 563     "MaxRecentDocs",
 564     SHELL_NO_POLICY
 565   },
 566   {
 567     0x40000031,
 568     strExplorer,
 569     "NoNetworkConnections",
 570     SHELL_NO_POLICY
 571   },
 572   {
 573     0x40000032,
 574     strExplorer,
 575     "ForceStartMenuLogoff",
 576     SHELL_NO_POLICY
 577   },
 578   {
 579     0x40000033,
 580     strExplorer,
 581      "NoWebView",
 582     SHELL_NO_POLICY
 583   },
 584   {
 585     0x40000034,
 586     strExplorer,
 587     "NoCustomizeThisFolder",
 588     SHELL_NO_POLICY
 589   },
 590   {
 591     0x40000035,
 592     strExplorer,
 593     "NoEncryption",
 594     SHELL_NO_POLICY
 595   },
 596   {
 597     0x40000036,
 598     strExplorer,
 599     "AllowFrenchEncryption",
 600     SHELL_NO_POLICY
 601   },
 602   {
 603     0x40000037,
 604     strExplorer,
 605     "DontShowSuperHidden",
 606     SHELL_NO_POLICY
 607   },
 608   {
 609     0x40000038,
 610     strExplorer,
 611     "NoShellSearchButton",
 612     SHELL_NO_POLICY
 613   },
 614   {
 615     0x40000039,
 616     strExplorer,
 617     "NoHardwareTab",
 618     SHELL_NO_POLICY
 619   },
 620   {
 621     0x4000003A,
 622     strExplorer,
 623     "NoRunasInstallPrompt",
 624     SHELL_NO_POLICY
 625   },
 626   {
 627     0x4000003B,
 628     strExplorer,
 629     "PromptRunasInstallNetPath",
 630     SHELL_NO_POLICY
 631   },
 632   {
 633     0x4000003C,
 634     strExplorer,
 635     "NoManageMyComputerVerb",
 636     SHELL_NO_POLICY
 637   },
 638   {
 639     0x4000003D,
 640     strExplorer,
 641     "NoRecentDocsNetHood",
 642     SHELL_NO_POLICY
 643   },
 644   {
 645     0x4000003E,
 646     strExplorer,
 647     "DisallowRun",
 648     SHELL_NO_POLICY
 649   },
 650   {
 651     0x4000003F,
 652     strExplorer,
 653     "NoWelcomeScreen",
 654     SHELL_NO_POLICY
 655   },
 656   {
 657     0x40000040,
 658     strExplorer,
 659     "RestrictCpl",
 660     SHELL_NO_POLICY
 661   },
 662   {
 663     0x40000041,
 664     strExplorer,
 665     "DisallowCpl",
 666     SHELL_NO_POLICY
 667   },
 668   {
 669     0x40000042,
 670     strExplorer,
 671     "NoSMBalloonTip",
 672     SHELL_NO_POLICY
 673   },
 674   {
 675     0x40000043,
 676     strExplorer,
 677     "NoSMHelp",
 678     SHELL_NO_POLICY
 679   },
 680   {
 681     0x40000044,
 682     strExplorer,
 683     "NoWinKeys",
 684     SHELL_NO_POLICY
 685   },
 686   {
 687     0x40000045,
 688     strExplorer,
 689     "NoEncryptOnMove",
 690     SHELL_NO_POLICY
 691   },
 692   {
 693     0x40000046,
 694     strExplorer,
 695     "DisableLocalMachineRun",
 696     SHELL_NO_POLICY
 697   },
 698   {
 699     0x40000047,
 700     strExplorer,
 701     "DisableCurrentUserRun",
 702     SHELL_NO_POLICY
 703   },
 704   {
 705     0x40000048,
 706     strExplorer,
 707     "DisableLocalMachineRunOnce",
 708     SHELL_NO_POLICY
 709   },
 710   {
 711     0x40000049,
 712     strExplorer,
 713     "DisableCurrentUserRunOnce",
 714     SHELL_NO_POLICY
 715   },
 716   {
 717     0x4000004A,
 718     strExplorer,
 719     "ForceActiveDesktopOn",
 720     SHELL_NO_POLICY
 721   },
 722   {
 723     0x4000004B,
 724     strExplorer,
 725     "NoComputersNearMe",
 726     SHELL_NO_POLICY
 727   },
 728   {
 729     0x4000004C,
 730     strExplorer,
 731     "NoViewOnDrive",
 732     SHELL_NO_POLICY
 733   },
 734   {
 735     0x4000004F,
 736     strExplorer,
 737     "NoSMMyDocs",
 738     SHELL_NO_POLICY
 739   },
 740   {
 741     0x40000061,
 742     strExplorer,
 743     "StartRunNoHOMEPATH",
 744     SHELL_NO_POLICY
 745   },
 746   {
 747     0x41000001,
 748     strExplorer,
 749     "NoDisconnect",
 750     SHELL_NO_POLICY
 751   },
 752   {
 753     0x41000002,
 754     strExplorer,
 755     "NoNTSecurity",
 756     SHELL_NO_POLICY
 757   },
 758   {
 759     0x41000003,
 760     strExplorer,
 761     "NoFileAssociate",
 762     SHELL_NO_POLICY
 763   },
 764   {
 765     0,
 766     0,
 767     0,
 768     SHELL_NO_POLICY
 769         }
 770 };
 771
 772 /*************************************************************************
 773  * SHRestricted                          [SHELL32.100]
 774  *
 775  * Get the value associated with a policy Id.
 776  *
 777  * PARAMS
 778  *     pol [I] Policy Id
 779  *
 780  * RETURNS
 781  *     The queried value for the policy.
 782  *
 783  * NOTES
 784  *     Exported by ordinal.
 785  *     This function caches the retrieved values to prevent unnecessary registry access,
 786  *     if SHInitRestricted() was previously called.
 787  *
 788  * REFERENCES
 789  *     a: MS System Policy Editor.
 790  *     b: 98Lite 2.0 (which uses many of these policy keys) http://www.98lite.net/
 791  *     c: 'The Windows 95 Registry', by John Woram, 1996 MIS: Press
 792  */
 793 DWORD WINAPI SHRestricted (DWORD policy)
 794 {
 795         char regstr[256];
 796         HKEY    xhkey;
 797         DWORD   retval, datsize = 4;
 798         LPPOLICYDATA p;
 799
 800         TRACE("(%08lx)\n", policy);
 801
 802         /* scan to see if we know this policy ID */
 803         for (p = sh32_policy_table; p->policy; p++)
 804         {
 805           if (policy == p->policy)
 806           {
 807             break;
 808           }
 809         }
 810
 811         if (p->policy == 0)
 812         {
 813             /* we don't know this policy, return 0 */
 814             TRACE("unknown policy: (%08lx)\n", policy);
 815                 return 0;
 816         }
 817
 818         /* we have a known policy */
 819
 820         /* first check if this policy has been cached, return it if so */
 821         if (p->cache != SHELL_NO_POLICY)
 822         {
 823             return p->cache;
 824         }
 825
 826         lstrcpyA(regstr, strRegistryPolicyA);
 827         lstrcatA(regstr, p->appstr);
 828
 829         /* return 0 and don't set the cache if any registry errors occur */
 830         retval = 0;
 831         if (RegOpenKeyA(HKEY_CURRENT_USER, regstr, &xhkey) == ERROR_SUCCESS)
 832         {
 833           if (RegQueryValueExA(xhkey, p->keystr, NULL, NULL, (LPBYTE)&retval, &datsize) == ERROR_SUCCESS)
 834           {
 835             p->cache = retval;
 836           }
 837           RegCloseKey(xhkey);
 838         }
 839         return retval;
 840 }
 841
 842 /*************************************************************************
 843  * SHInitRestricted          [SHELL32.244]
 844  *
 845  * Initialise the policy cache to speed up calls to SHRestricted().
 846  *
 847  * PARAMS
 848  *  unused    [I] Reserved.
 849  *  inpRegKey [I] Registry key to scan.
 850  *
 851  * RETURNS
 852  *  Success: -1. The policy cache is initialised.
 853  *  Failure: 0, if inpRegKey is any value other than NULL, "Policy", or
 854  *           "Software\Microsoft\Windows\CurrentVersion\Policies".
 855  *
 856  * NOTES
 857  *  Exported by ordinal. Introduced in Win98.
 858  */
 859 BOOL WINAPI SHInitRestricted(LPCVOID unused, LPCVOID inpRegKey)
 860 {
 861         LPPOLICYDATA p;
 862
 863         TRACE("(%p, %p)\n", unused, inpRegKey);
 864
 865         /* first check - if input is non-NULL and points to the secret
 866            key string, then pass. Otherwise return 0.
 867          */
 868         if (inpRegKey != NULL)
 869         {
 870           if (SHELL_OsIsUnicode())
 871           {
 872             if (lstrcmpiW((LPWSTR)inpRegKey, strRegistryPolicyW) &&
 873                 lstrcmpiW((LPWSTR)inpRegKey, strPolicyW))
 874               /* doesn't match, fail */
 875               return 0;
 876           }
 877           else
 878           {
 879             if (lstrcmpiA((LPSTR)inpRegKey, strRegistryPolicyA) &&
 880                 lstrcmpiA((LPSTR)inpRegKey, strPolicyA))
 881               /* doesn't match, fail */
 882               return 0;
 883           }
 884         }
 885
 886         /* check passed, init all policy cache entries with SHELL_NO_POLICY */
 887         for (p = sh32_policy_table; p->policy; p++)
 888         {
 889           p->cache = SHELL_NO_POLICY;
 890         }
 891         return SHELL_NO_POLICY;
 892 }