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 <stdarg.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "winerror.h"
  39 #include "winreg.h"
  40
  41 #include "shell32_main.h"
  42
  43 #include "wine/debug.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  46
  47 #define SHELL_NO_POLICY 0xffffffff
  48
  49 typedef struct tagPOLICYDAT
  50 {
  51   DWORD policy;          /* policy value passed to SHRestricted */
  52   LPCSTR appstr;         /* application str such as "Explorer" */
  53   LPCSTR keystr;         /* name of the actual registry key / policy */
  54   DWORD cache;           /* cached value or 0xffffffff for invalid */
  55 } POLICYDATA, *LPPOLICYDATA;
  56
  57 /* registry strings */
  58 static const CHAR strRegistryPolicyA[] = "Software\\Microsoft\\Windows\\CurrentVersion\\Policies";
  59 static const WCHAR strRegistryPolicyW[] = {'S','o','f','t','w','a','r','e','\\','M','i','c','r','o',
  60                                            's','o','f','t','\\','W','i','n','d','o','w','s','\\',
  61                                            'C','u','r','r','e','n','t','V','e','r','s','i','o','n',
  62                                            '\\','P','o','l','i','c','i','e','s',0};
  63 static const CHAR strPolicyA[] = "Policy";
  64 static const WCHAR strPolicyW[] = {'P','o','l','i','c','y',0};
  65
  66 /* application strings */
  67
  68 static const char strExplorer[] = {"Explorer"};
  69 static const char strActiveDesk[] = {"ActiveDesktop"};
  70 static const char strWinOldApp[] = {"WinOldApp"};
  71 static const char strAddRemoveProgs[] = {"AddRemoveProgs"};
  72
  73 /* key strings */
  74
  75 static const char strNoFileURL[] = {"NoFileUrl"};
  76 static const char strNoFolderOptions[] = {"NoFolderOptions"};
  77 static const char strNoChangeStartMenu[] = {"NoChangeStartMenu"};
  78 static const char strNoWindowsUpdate[] = {"NoWindowsUpdate"};
  79 static const char strNoSetActiveDesktop[] = {"NoSetActiveDesktop"};
  80 static const char strNoForgetSoftwareUpdate[] = {"NoForgetSoftwareUpdate"};
  81 static const char strNoMSAppLogo[] = {"NoMSAppLogo5ChannelNotify"};
  82 static const char strForceCopyACLW[] = {"ForceCopyACLWithFile"};
  83 static const char strNoResolveTrk[] = {"NoResolveTrack"};
  84 static const char strNoResolveSearch[] = {"NoResolveSearch"};
  85 static const char strNoEditComponent[] = {"NoEditingComponents"};
  86 static const char strNoMovingBand[] = {"NoMovingBands"};
  87 static const char strNoCloseDragDrop[] = {"NoCloseDragDropBands"};
  88 static const char strNoCloseComponent[] = {"NoClosingComponents"};
  89 static const char strNoDelComponent[] = {"NoDeletingComponents"};
  90 static const char strNoAddComponent[] = {"NoAddingComponents"};
  91 static const char strNoComponent[] = {"NoComponents"};
  92 static const char strNoChangeWallpaper[] = {"NoChangingWallpaper"};
  93 static const char strNoHTMLWallpaper[] = {"NoHTMLWallpaper"};
  94 static const char strNoCustomWebView[] = {"NoCustomizeWebView"};
  95 static const char strClassicShell[] = {"ClassicShell"};
  96 static const char strClearRecentDocs[] = {"ClearRecentDocsOnExit"};
  97 static const char strNoFavoritesMenu[] = {"NoFavoritesMenu"};
  98 static const char strNoActiveDesktopChanges[] = {"NoActiveDesktopChanges"};
  99 static const char strNoActiveDesktop[] = {"NoActiveDesktop"};
 100 static const char strNoRecentDocMenu[] = {"NoRecentDocsMenu"};
 101 static const char strNoRecentDocHistory[] = {"NoRecentDocsHistory"};
 102 static const char strNoInetIcon[] = {"NoInternetIcon"};
 103 static const char strNoStngsWizard[] = {"NoSettingsWizards"};
 104 static const char strNoLogoff[] = {"NoLogoff"};
 105 static const char strNoNetConDis[] = {"NoNetConnectDisconnect"};
 106 static const char strNoContextMenu[] = {"NoViewContextMenu"};
 107 static const char strNoTryContextMenu[] = {"NoTrayContextMenu"};
 108 static const char strNoWebMenu[] = {"NoWebMenu"};
 109 static const char strLnkResolveIgnoreLnkInfo[] = {"LinkResolveIgnoreLinkInfo"};
 110 static const char strNoCommonGroups[] = {"NoCommonGroups"};
 111 static const char strEnforceShlExtSecurity[] = {"EnforceShellExtensionSecurity"};
 112 static const char strNoRealMode[] = {"NoRealMode"};
 113 static const char strMyDocsOnNet[] = {"MyDocsOnNet"};
 114 static const char strNoStartMenuSubfolder[] = {"NoStartMenuSubFolders"};
 115 static const char strNoAddPrinters[] = {"NoAddPrinter"};
 116 static const char strNoDeletePrinters[] = {"NoDeletePrinter"};
 117 static const char strNoPrintTab[] = {"NoPrinterTabs"};
 118 static const char strRestrictRun[] = {"RestrictRun"};
 119 static const char strNoStartBanner[] = {"NoStartBanner"};
 120 static const char strNoNetworkNeighborhood[] = {"NoNetHood"};
 121 static const char strNoDriveTypeAtRun[] = {"NoDriveTypeAutoRun"};
 122 static const char strNoDrivesAutoRun[] = {"NoDriveAutoRun"};
 123 static const char strNoDrives[] = {"NoDrives"};
 124 static const char strNoFind[] = {"NoFind"};
 125 static const char strNoDesktop[] = {"NoDesktop"};
 126 static const char strNoSetTaskBar[] = {"NoSetTaskbar"};
 127 static const char strNoSetFld[] = {"NoSetFolders"};
 128 static const char strNoFileMenu[] = {"NoFileMenu"};
 129 static const char strNoSavSetng[] = {"NoSaveSettings"};
 130 static const char strNoClose[] = {"NoClose"};
 131 static const char strNoRun[] = {"NoRun"};
 132
 133 /* policy data array */
 134 POLICYDATA sh32_policy_table[] =
 135 {
 136   {
 137     0x1,
 138     strExplorer,
 139     strNoRun,
 140     SHELL_NO_POLICY
 141   },
 142   {
 143     0x2,
 144     strExplorer,
 145     strNoClose,
 146     SHELL_NO_POLICY
 147   },
 148   {
 149     0x4,
 150     strExplorer,
 151     strNoSavSetng,
 152     SHELL_NO_POLICY
 153   },
 154   {
 155     0x8,
 156     strExplorer,
 157     strNoFileMenu,
 158     SHELL_NO_POLICY
 159   },
 160   {
 161     0x10,
 162     strExplorer,
 163     strNoSetFld,
 164     SHELL_NO_POLICY
 165   },
 166   {
 167     0x20,
 168     strExplorer,
 169     strNoSetTaskBar,
 170     SHELL_NO_POLICY
 171   },
 172   {
 173     0x40,
 174     strExplorer,
 175     strNoDesktop,
 176     SHELL_NO_POLICY
 177   },
 178   {
 179     0x80,
 180     strExplorer,
 181     strNoFind,
 182     SHELL_NO_POLICY
 183   },
 184   {
 185     0x100,
 186     strExplorer,
 187     strNoDrives,
 188     SHELL_NO_POLICY
 189   },
 190   {
 191     0x200,
 192     strExplorer,
 193     strNoDrivesAutoRun,
 194     SHELL_NO_POLICY
 195   },
 196   {
 197     0x400,
 198     strExplorer,
 199     strNoDriveTypeAtRun,
 200     SHELL_NO_POLICY
 201   },
 202   {
 203     0x800,
 204     strExplorer,
 205     strNoNetworkNeighborhood,
 206     SHELL_NO_POLICY
 207   },
 208   {
 209     0x1000,
 210     strExplorer,
 211     strNoStartBanner,
 212     SHELL_NO_POLICY
 213   },
 214   {
 215     0x2000,
 216     strExplorer,
 217     strRestrictRun,
 218     SHELL_NO_POLICY
 219   },
 220   {
 221     0x4000,
 222     strExplorer,
 223     strNoPrintTab,
 224     SHELL_NO_POLICY
 225   },
 226   {
 227     0x8000,
 228     strExplorer,
 229     strNoDeletePrinters,
 230     SHELL_NO_POLICY
 231   },
 232   {
 233     0x10000,
 234     strExplorer,
 235     strNoAddPrinters,
 236     SHELL_NO_POLICY
 237   },
 238   {
 239     0x20000,
 240     strExplorer,
 241     strNoStartMenuSubfolder,
 242     SHELL_NO_POLICY
 243   },
 244   {
 245     0x40000,
 246     strExplorer,
 247     strMyDocsOnNet,
 248     SHELL_NO_POLICY
 249   },
 250   {
 251     0x80000,
 252     strWinOldApp,
 253     strNoRealMode,
 254     SHELL_NO_POLICY
 255   },
 256   {
 257     0x100000,
 258     strExplorer,
 259     strEnforceShlExtSecurity,
 260     SHELL_NO_POLICY
 261   },
 262   {
 263     0x200000,
 264     strExplorer,
 265     strLnkResolveIgnoreLnkInfo,
 266     SHELL_NO_POLICY
 267   },
 268   {
 269     0x400000,
 270     strExplorer,
 271     strNoCommonGroups,
 272     SHELL_NO_POLICY
 273   },
 274   {
 275     0x800000,
 276     strExplorer,
 277     "SeparateProcess",
 278     SHELL_NO_POLICY
 279   },
 280   {
 281     0x1000000,
 282     strExplorer,
 283     strNoWebMenu,
 284     SHELL_NO_POLICY
 285   },
 286   {
 287     0x2000000,
 288     strExplorer,
 289     strNoTryContextMenu,
 290     SHELL_NO_POLICY
 291   },
 292   {
 293     0x4000000,
 294     strExplorer,
 295     strNoContextMenu,
 296     SHELL_NO_POLICY
 297   },
 298   {
 299     0x8000000,
 300     strExplorer,
 301     strNoNetConDis,
 302     SHELL_NO_POLICY
 303   },
 304   {
 305     0x10000000,
 306     strExplorer,
 307     strNoLogoff,
 308     SHELL_NO_POLICY
 309   },
 310   {
 311     0x20000000,
 312     strExplorer,
 313     strNoStngsWizard,
 314     SHELL_NO_POLICY
 315   },
 316   {
 317     0x40000001,
 318     strExplorer,
 319     strNoInetIcon,
 320     SHELL_NO_POLICY
 321   },
 322   {
 323     0x40000002,
 324     strExplorer,
 325     strNoRecentDocHistory,
 326     SHELL_NO_POLICY
 327   },
 328   {
 329     0x40000003,
 330     strExplorer,
 331     strNoRecentDocMenu,
 332     SHELL_NO_POLICY
 333   },
 334   {
 335     0x40000004,
 336     strExplorer,
 337     strNoActiveDesktop,
 338     SHELL_NO_POLICY
 339   },
 340   {
 341     0x40000005,
 342     strExplorer,
 343     strNoActiveDesktopChanges,
 344     SHELL_NO_POLICY
 345   },
 346   {
 347     0x40000006,
 348     strExplorer,
 349     strNoFavoritesMenu,
 350     SHELL_NO_POLICY
 351   },
 352   {
 353     0x40000007,
 354     strExplorer,
 355     strClearRecentDocs,
 356     SHELL_NO_POLICY
 357   },
 358   {
 359     0x40000008,
 360     strExplorer,
 361     strClassicShell,
 362     SHELL_NO_POLICY
 363   },
 364   {
 365     0x40000009,
 366     strExplorer,
 367     strNoCustomWebView,
 368     SHELL_NO_POLICY
 369   },
 370   {
 371     0x40000010,
 372     strActiveDesk,
 373     strNoHTMLWallpaper,
 374     SHELL_NO_POLICY
 375   },
 376   {
 377     0x40000011,
 378     strActiveDesk,
 379     strNoChangeWallpaper,
 380     SHELL_NO_POLICY
 381   },
 382   {
 383     0x40000012,
 384     strActiveDesk,
 385     strNoComponent,
 386     SHELL_NO_POLICY
 387   },
 388   {
 389     0x40000013,
 390     strActiveDesk,
 391     strNoAddComponent,
 392     SHELL_NO_POLICY
 393   },
 394   {
 395     0x40000014,
 396     strActiveDesk,
 397     strNoDelComponent,
 398     SHELL_NO_POLICY
 399   },
 400   {
 401     0x40000015,
 402     strActiveDesk,
 403     strNoCloseComponent,
 404     SHELL_NO_POLICY
 405   },
 406   {
 407     0x40000016,
 408     strActiveDesk,
 409     strNoCloseDragDrop,
 410     SHELL_NO_POLICY
 411   },
 412   {
 413     0x40000017,
 414     strActiveDesk,
 415     strNoMovingBand,
 416     SHELL_NO_POLICY
 417   },
 418   {
 419     0x40000018,
 420     strActiveDesk,
 421     strNoEditComponent,
 422     SHELL_NO_POLICY
 423   },
 424   {
 425     0x40000019,
 426     strExplorer,
 427     strNoResolveSearch,
 428     SHELL_NO_POLICY
 429   },
 430   {
 431     0x4000001a,
 432     strExplorer,
 433     strNoResolveTrk,
 434     SHELL_NO_POLICY
 435   },
 436   {
 437     0x4000001b,
 438     strExplorer,
 439     strForceCopyACLW,
 440     SHELL_NO_POLICY
 441   },
 442   {
 443     0x4000001c,
 444     strExplorer,
 445     strNoMSAppLogo,
 446     SHELL_NO_POLICY
 447   },
 448   {
 449     0x4000001d,
 450     strExplorer,
 451     strNoForgetSoftwareUpdate,
 452     SHELL_NO_POLICY
 453   },
 454   {
 455     0x4000001e,
 456     strExplorer,
 457     strNoSetActiveDesktop,
 458     SHELL_NO_POLICY
 459   },
 460   {
 461     0x4000001f,
 462     strExplorer,
 463     strNoWindowsUpdate,
 464     SHELL_NO_POLICY
 465   },
 466   {
 467     0x40000020,
 468     strExplorer,
 469     strNoChangeStartMenu,
 470     SHELL_NO_POLICY
 471   },
 472   {
 473     0x40000021,
 474     strExplorer,
 475     strNoFolderOptions,
 476     SHELL_NO_POLICY
 477   },
 478   {
 479     0x50000024,
 480     strExplorer,
 481     strNoFileURL,
 482     SHELL_NO_POLICY
 483   },
 484   {
 485     0x40000022,
 486     strExplorer,
 487     "FindComputers",
 488     SHELL_NO_POLICY
 489   },
 490   {
 491     0x40000023,
 492     strExplorer,
 493     "IntelliMenus",
 494     SHELL_NO_POLICY
 495   },
 496   {
 497     0x40000024,
 498     strExplorer,
 499     "MemCheckBoxInRunDlg",
 500     SHELL_NO_POLICY
 501   },
 502   {
 503     0x40000025,
 504     strAddRemoveProgs,
 505     "ShowPostSetup",
 506     SHELL_NO_POLICY
 507   },
 508   {
 509     0x40000026,
 510     strExplorer,
 511     "NoSyncAll",
 512     SHELL_NO_POLICY
 513   },
 514   {
 515     0x40000027,
 516     strExplorer,
 517     "NoControlPanel",
 518     SHELL_NO_POLICY
 519   },
 520   {
 521     0x40000028,
 522     strExplorer,
 523     "EnumWorkgroup",
 524     SHELL_NO_POLICY
 525   },
 526   {
 527     0x40000029,
 528     strAddRemoveProgs,
 529     "NoAddRemovePrograms",
 530     SHELL_NO_POLICY
 531   },
 532   {
 533     0x4000002A,
 534     strAddRemoveProgs,
 535     "NoRemovePage",
 536     SHELL_NO_POLICY
 537   },
 538   {
 539     0x4000002B,
 540     strAddRemoveProgs,
 541     "NoAddPage",
 542     SHELL_NO_POLICY
 543   },
 544   {
 545     0x4000002C,
 546     strAddRemoveProgs,
 547     "NoWindowsSetupPage",
 548     SHELL_NO_POLICY
 549   },
 550   {
 551     0x4000002E,
 552     strExplorer,
 553     "NoChangeMappedDriveLabel",
 554     SHELL_NO_POLICY
 555   },
 556   {
 557     0x4000002F,
 558     strExplorer,
 559     "NoChangeMappedDriveComment",
 560     SHELL_NO_POLICY
 561   },
 562   {
 563     0x40000030,
 564     strExplorer,
 565     "MaxRecentDocs",
 566     SHELL_NO_POLICY
 567   },
 568   {
 569     0x40000031,
 570     strExplorer,
 571     "NoNetworkConnections",
 572     SHELL_NO_POLICY
 573   },
 574   {
 575     0x40000032,
 576     strExplorer,
 577     "ForceStartMenuLogoff",
 578     SHELL_NO_POLICY
 579   },
 580   {
 581     0x40000033,
 582     strExplorer,
 583      "NoWebView",
 584     SHELL_NO_POLICY
 585   },
 586   {
 587     0x40000034,
 588     strExplorer,
 589     "NoCustomizeThisFolder",
 590     SHELL_NO_POLICY
 591   },
 592   {
 593     0x40000035,
 594     strExplorer,
 595     "NoEncryption",
 596     SHELL_NO_POLICY
 597   },
 598   {
 599     0x40000036,
 600     strExplorer,
 601     "AllowFrenchEncryption",
 602     SHELL_NO_POLICY
 603   },
 604   {
 605     0x40000037,
 606     strExplorer,
 607     "DontShowSuperHidden",
 608     SHELL_NO_POLICY
 609   },
 610   {
 611     0x40000038,
 612     strExplorer,
 613     "NoShellSearchButton",
 614     SHELL_NO_POLICY
 615   },
 616   {
 617     0x40000039,
 618     strExplorer,
 619     "NoHardwareTab",
 620     SHELL_NO_POLICY
 621   },
 622   {
 623     0x4000003A,
 624     strExplorer,
 625     "NoRunasInstallPrompt",
 626     SHELL_NO_POLICY
 627   },
 628   {
 629     0x4000003B,
 630     strExplorer,
 631     "PromptRunasInstallNetPath",
 632     SHELL_NO_POLICY
 633   },
 634   {
 635     0x4000003C,
 636     strExplorer,
 637     "NoManageMyComputerVerb",
 638     SHELL_NO_POLICY
 639   },
 640   {
 641     0x4000003D,
 642     strExplorer,
 643     "NoRecentDocsNetHood",
 644     SHELL_NO_POLICY
 645   },
 646   {
 647     0x4000003E,
 648     strExplorer,
 649     "DisallowRun",
 650     SHELL_NO_POLICY
 651   },
 652   {
 653     0x4000003F,
 654     strExplorer,
 655     "NoWelcomeScreen",
 656     SHELL_NO_POLICY
 657   },
 658   {
 659     0x40000040,
 660     strExplorer,
 661     "RestrictCpl",
 662     SHELL_NO_POLICY
 663   },
 664   {
 665     0x40000041,
 666     strExplorer,
 667     "DisallowCpl",
 668     SHELL_NO_POLICY
 669   },
 670   {
 671     0x40000042,
 672     strExplorer,
 673     "NoSMBalloonTip",
 674     SHELL_NO_POLICY
 675   },
 676   {
 677     0x40000043,
 678     strExplorer,
 679     "NoSMHelp",
 680     SHELL_NO_POLICY
 681   },
 682   {
 683     0x40000044,
 684     strExplorer,
 685     "NoWinKeys",
 686     SHELL_NO_POLICY
 687   },
 688   {
 689     0x40000045,
 690     strExplorer,
 691     "NoEncryptOnMove",
 692     SHELL_NO_POLICY
 693   },
 694   {
 695     0x40000046,
 696     strExplorer,
 697     "DisableLocalMachineRun",
 698     SHELL_NO_POLICY
 699   },
 700   {
 701     0x40000047,
 702     strExplorer,
 703     "DisableCurrentUserRun",
 704     SHELL_NO_POLICY
 705   },
 706   {
 707     0x40000048,
 708     strExplorer,
 709     "DisableLocalMachineRunOnce",
 710     SHELL_NO_POLICY
 711   },
 712   {
 713     0x40000049,
 714     strExplorer,
 715     "DisableCurrentUserRunOnce",
 716     SHELL_NO_POLICY
 717   },
 718   {
 719     0x4000004A,
 720     strExplorer,
 721     "ForceActiveDesktopOn",
 722     SHELL_NO_POLICY
 723   },
 724   {
 725     0x4000004B,
 726     strExplorer,
 727     "NoComputersNearMe",
 728     SHELL_NO_POLICY
 729   },
 730   {
 731     0x4000004C,
 732     strExplorer,
 733     "NoViewOnDrive",
 734     SHELL_NO_POLICY
 735   },
 736   {
 737     0x4000004F,
 738     strExplorer,
 739     "NoSMMyDocs",
 740     SHELL_NO_POLICY
 741   },
 742   {
 743     0x40000061,
 744     strExplorer,
 745     "StartRunNoHOMEPATH",
 746     SHELL_NO_POLICY
 747   },
 748   {
 749     0x41000001,
 750     strExplorer,
 751     "NoDisconnect",
 752     SHELL_NO_POLICY
 753   },
 754   {
 755     0x41000002,
 756     strExplorer,
 757     "NoNTSecurity",
 758     SHELL_NO_POLICY
 759   },
 760   {
 761     0x41000003,
 762     strExplorer,
 763     "NoFileAssociate",
 764     SHELL_NO_POLICY
 765   },
 766   {
 767     0,
 768     0,
 769     0,
 770     SHELL_NO_POLICY
 771         }
 772 };
 773
 774 /*************************************************************************
 775  * SHRestricted                          [SHELL32.100]
 776  *
 777  * Get the value associated with a policy Id.
 778  *
 779  * PARAMS
 780  *     pol [I] Policy Id
 781  *
 782  * RETURNS
 783  *     The queried value for the policy.
 784  *
 785  * NOTES
 786  *     Exported by ordinal.
 787  *     This function caches the retrieved values to prevent unnecessary registry access,
 788  *     if SHInitRestricted() was previously called.
 789  *
 790  * REFERENCES
 791  *     a: MS System Policy Editor.
 792  *     b: 98Lite 2.0 (which uses many of these policy keys) http://www.98lite.net/
 793  *     c: 'The Windows 95 Registry', by John Woram, 1996 MIS: Press
 794  */
 795 DWORD WINAPI SHRestricted (DWORD policy)
 796 {
 797         char regstr[256];
 798         HKEY    xhkey;
 799         DWORD   retval, datsize = 4;
 800         LPPOLICYDATA p;
 801
 802         TRACE("(%08lx)\n", policy);
 803
 804         /* scan to see if we know this policy ID */
 805         for (p = sh32_policy_table; p->policy; p++)
 806         {
 807           if (policy == p->policy)
 808           {
 809             break;
 810           }
 811         }
 812
 813         if (p->policy == 0)
 814         {
 815             /* we don't know this policy, return 0 */
 816             TRACE("unknown policy: (%08lx)\n", policy);
 817                 return 0;
 818         }
 819
 820         /* we have a known policy */
 821
 822         /* first check if this policy has been cached, return it if so */
 823         if (p->cache != SHELL_NO_POLICY)
 824         {
 825             return p->cache;
 826         }
 827
 828         lstrcpyA(regstr, strRegistryPolicyA);
 829         lstrcatA(regstr, p->appstr);
 830
 831         /* return 0 and don't set the cache if any registry errors occur */
 832         retval = 0;
 833         if (RegOpenKeyA(HKEY_CURRENT_USER, regstr, &xhkey) == ERROR_SUCCESS)
 834         {
 835           if (RegQueryValueExA(xhkey, p->keystr, NULL, NULL, (LPBYTE)&retval, &datsize) == ERROR_SUCCESS)
 836           {
 837             p->cache = retval;
 838           }
 839           RegCloseKey(xhkey);
 840         }
 841         return retval;
 842 }
 843
 844 /*************************************************************************
 845  * SHInitRestricted          [SHELL32.244]
 846  *
 847  * Initialise the policy cache to speed up calls to SHRestricted().
 848  *
 849  * PARAMS
 850  *  unused    [I] Reserved.
 851  *  inpRegKey [I] Registry key to scan.
 852  *
 853  * RETURNS
 854  *  Success: -1. The policy cache is initialised.
 855  *  Failure: 0, if inpRegKey is any value other than NULL, "Policy", or
 856  *           "Software\Microsoft\Windows\CurrentVersion\Policies".
 857  *
 858  * NOTES
 859  *  Exported by ordinal. Introduced in Win98.
 860  */
 861 BOOL WINAPI SHInitRestricted(LPCVOID unused, LPCVOID inpRegKey)
 862 {
 863         LPPOLICYDATA p;
 864
 865         TRACE("(%p, %p)\n", unused, inpRegKey);
 866
 867         /* first check - if input is non-NULL and points to the secret
 868            key string, then pass. Otherwise return 0.
 869          */
 870         if (inpRegKey != NULL)
 871         {
 872           if (SHELL_OsIsUnicode())
 873           {
 874             if (lstrcmpiW((LPWSTR)inpRegKey, strRegistryPolicyW) &&
 875                 lstrcmpiW((LPWSTR)inpRegKey, strPolicyW))
 876               /* doesn't match, fail */
 877               return 0;
 878           }
 879           else
 880           {
 881             if (lstrcmpiA((LPSTR)inpRegKey, strRegistryPolicyA) &&
 882                 lstrcmpiA((LPSTR)inpRegKey, strPolicyA))
 883               /* doesn't match, fail */
 884               return 0;
 885           }
 886         }
 887
 888         /* check passed, init all policy cache entries with SHELL_NO_POLICY */
 889         for (p = sh32_policy_table; p->policy; p++)
 890         {
 891           p->cache = SHELL_NO_POLICY;
 892         }
 893         return SHELL_NO_POLICY;
 894 }