SecurityPkg/Library/DxeTcgPhysicalPresenceLib/DxeTcgPhysicalPresenceLib.c

   1 /** @file
   2
   3   Execute pending TPM requests from OS or BIOS and Lock TPM.
   4
   5 Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
   6 This program and the accompanying materials
   7 are licensed and made available under the terms and conditions of the BSD License
   8 which accompanies this distribution.  The full text of the license may be found at
   9 http://opensource.org/licenses/bsd-license.php
  10
  11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <PiDxe.h>
  17
  18 #include <Protocol/TcgService.h>
  19 #include <Library/DebugLib.h>
  20 #include <Library/BaseMemoryLib.h>
  21 #include <Library/UefiRuntimeServicesTableLib.h>
  22 #include <Library/UefiDriverEntryPoint.h>
  23 #include <Library/UefiBootServicesTableLib.h>
  24 #include <Library/UefiLib.h>
  25 #include <Library/MemoryAllocationLib.h>
  26 #include <Library/PrintLib.h>
  27 #include <Library/HiiLib.h>
  28 #include <Guid/EventGroup.h>
  29 #include <Guid/PhysicalPresenceData.h>
  30
  31 #define TPM_PP_USER_ABORT           ((TPM_RESULT)(-0x10))
  32 #define TPM_PP_BIOS_FAILURE         ((TPM_RESULT)(-0x0f))
  33 #define CONFIRM_BUFFER_SIZE         4096
  34
  35 EFI_HII_HANDLE mPpStringPackHandle;
  36
  37 /**
  38   Get string by string id from HII Interface.
  39
  40   @param[in] Id          String ID.
  41
  42   @retval    CHAR16 *    String from ID.
  43   @retval    NULL        If error occurs.
  44
  45 **/
  46 CHAR16 *
  47 PhysicalPresenceGetStringById (
  48   IN  EFI_STRING_ID   Id
  49   )
  50 {
  51   return HiiGetString (mPpStringPackHandle, Id, NULL);
  52 }
  53
  54 /**
  55   Get TPM physical presence permanent flags.
  56
  57   @param[in]  TcgProtocol   EFI TCG Protocol instance.
  58   @param[out] LifetimeLock  physicalPresenceLifetimeLock permanent flag.
  59   @param[out] CmdEnable     physicalPresenceCMDEnable permanent flag.
  60
  61   @retval EFI_SUCCESS       Flags were returns successfully.
  62   @retval other             Failed to locate EFI TCG Protocol.
  63
  64 **/
  65 EFI_STATUS
  66 GetTpmCapability (
  67   IN   EFI_TCG_PROTOCOL             *TcgProtocol,
  68   OUT  BOOLEAN                      *LifetimeLock,
  69   OUT  BOOLEAN                      *CmdEnable
  70   )
  71 {
  72   EFI_STATUS                        Status;
  73   TPM_RQU_COMMAND_HDR               *TpmRqu;
  74   TPM_RSP_COMMAND_HDR               *TpmRsp;
  75   UINT32                            *SendBufPtr;
  76   UINT8                             SendBuffer[sizeof (*TpmRqu) + sizeof (UINT32) * 3];
  77   TPM_PERMANENT_FLAGS               *TpmPermanentFlags;
  78   UINT8                             RecvBuffer[40];
  79
  80   //
  81   // Fill request header
  82   //
  83   TpmRsp = (TPM_RSP_COMMAND_HDR*)RecvBuffer;
  84   TpmRqu = (TPM_RQU_COMMAND_HDR*)SendBuffer;
  85
  86   TpmRqu->tag       = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  87   TpmRqu->paramSize = SwapBytes32 (sizeof (SendBuffer));
  88   TpmRqu->ordinal   = SwapBytes32 (TPM_ORD_GetCapability);
  89
  90   //
  91   // Set request parameter
  92   //
  93   SendBufPtr      = (UINT32*)(TpmRqu + 1);
  94   WriteUnaligned32 (SendBufPtr++, SwapBytes32 (TPM_CAP_FLAG));
  95   WriteUnaligned32 (SendBufPtr++, SwapBytes32 (sizeof (TPM_CAP_FLAG_PERMANENT)));
  96   WriteUnaligned32 (SendBufPtr, SwapBytes32 (TPM_CAP_FLAG_PERMANENT));
  97
  98   Status = TcgProtocol->PassThroughToTpm (
  99                           TcgProtocol,
 100                           sizeof (SendBuffer),
 101                           (UINT8*)TpmRqu,
 102                           sizeof (RecvBuffer),
 103                           (UINT8*)&RecvBuffer
 104                           );
 105   ASSERT_EFI_ERROR (Status);
 106   ASSERT (TpmRsp->tag == SwapBytes16 (TPM_TAG_RSP_COMMAND));
 107   ASSERT (TpmRsp->returnCode == 0);
 108
 109   TpmPermanentFlags = (TPM_PERMANENT_FLAGS *)&RecvBuffer[sizeof (TPM_RSP_COMMAND_HDR) + sizeof (UINT32)];
 110
 111   if (LifetimeLock != NULL) {
 112     *LifetimeLock = TpmPermanentFlags->physicalPresenceLifetimeLock;
 113   }
 114
 115   if (CmdEnable != NULL) {
 116     *CmdEnable = TpmPermanentFlags->physicalPresenceCMDEnable;
 117   }
 118
 119   return Status;
 120 }
 121
 122 /**
 123   Issue TSC_PhysicalPresence command to TPM.
 124
 125   @param[in] TcgProtocol          EFI TCG Protocol instance.
 126   @param[in] PhysicalPresence     The state to set the TPM's Physical Presence flags.
 127
 128   @retval EFI_SUCCESS             TPM executed the command successfully.
 129   @retval EFI_SECURITY_VIOLATION  TPM returned error when executing the command.
 130   @retval other                   Failed to locate EFI TCG Protocol.
 131
 132 **/
 133 EFI_STATUS
 134 TpmPhysicalPresence (
 135   IN      EFI_TCG_PROTOCOL          *TcgProtocol,
 136   IN      TPM_PHYSICAL_PRESENCE     PhysicalPresence
 137   )
 138 {
 139   EFI_STATUS                        Status;
 140   TPM_RQU_COMMAND_HDR               *TpmRqu;
 141   TPM_PHYSICAL_PRESENCE             *TpmPp;
 142   TPM_RSP_COMMAND_HDR               TpmRsp;
 143   UINT8                             Buffer[sizeof (*TpmRqu) + sizeof (*TpmPp)];
 144
 145   TpmRqu = (TPM_RQU_COMMAND_HDR*)Buffer;
 146   TpmPp = (TPM_PHYSICAL_PRESENCE*)(TpmRqu + 1);
 147
 148   TpmRqu->tag       = SwapBytes16 (TPM_TAG_RQU_COMMAND);
 149   TpmRqu->paramSize = SwapBytes32 (sizeof (Buffer));
 150   TpmRqu->ordinal   = SwapBytes32 (TSC_ORD_PhysicalPresence);
 151   WriteUnaligned16 (TpmPp, (TPM_PHYSICAL_PRESENCE) SwapBytes16 (PhysicalPresence));
 152
 153   Status = TcgProtocol->PassThroughToTpm (
 154                           TcgProtocol,
 155                           sizeof (Buffer),
 156                           (UINT8*)TpmRqu,
 157                           sizeof (TpmRsp),
 158                           (UINT8*)&TpmRsp
 159                           );
 160   ASSERT_EFI_ERROR (Status);
 161   ASSERT (TpmRsp.tag == SwapBytes16 (TPM_TAG_RSP_COMMAND));
 162   if (TpmRsp.returnCode != 0) {
 163     //
 164     // If it fails, some requirements may be needed for this command.
 165     //
 166     return EFI_SECURITY_VIOLATION;
 167   }
 168
 169   return Status;
 170 }
 171
 172 /**
 173   Issue a TPM command for which no additional output data will be returned.
 174
 175   @param[in] TcgProtocol              EFI TCG Protocol instance.
 176   @param[in] Ordinal                  TPM command code.
 177   @param[in] AdditionalParameterSize  Additional parameter size.
 178   @param[in] AdditionalParameters     Pointer to the Additional paramaters.
 179
 180   @retval TPM_PP_BIOS_FAILURE         Error occurred during sending command to TPM or
 181                                       receiving response from TPM.
 182   @retval Others                      Return code from the TPM device after command execution.
 183
 184 **/
 185 TPM_RESULT
 186 TpmCommandNoReturnData (
 187   IN      EFI_TCG_PROTOCOL          *TcgProtocol,
 188   IN      TPM_COMMAND_CODE          Ordinal,
 189   IN      UINTN                     AdditionalParameterSize,
 190   IN      VOID                      *AdditionalParameters
 191   )
 192 {
 193   EFI_STATUS                        Status;
 194   TPM_RQU_COMMAND_HDR               *TpmRqu;
 195   TPM_RSP_COMMAND_HDR               TpmRsp;
 196   UINT32                            Size;
 197
 198   TpmRqu = (TPM_RQU_COMMAND_HDR*) AllocatePool (sizeof (*TpmRqu) + AdditionalParameterSize);
 199   if (TpmRqu == NULL) {
 200     return TPM_PP_BIOS_FAILURE;
 201   }
 202
 203   TpmRqu->tag       = SwapBytes16 (TPM_TAG_RQU_COMMAND);
 204   Size              = (UINT32)(sizeof (*TpmRqu) + AdditionalParameterSize);
 205   TpmRqu->paramSize = SwapBytes32 (Size);
 206   TpmRqu->ordinal   = SwapBytes32 (Ordinal);
 207   CopyMem (TpmRqu + 1, AdditionalParameters, AdditionalParameterSize);
 208
 209   Status = TcgProtocol->PassThroughToTpm (
 210                           TcgProtocol,
 211                           Size,
 212                           (UINT8*)TpmRqu,
 213                           (UINT32)sizeof (TpmRsp),
 214                           (UINT8*)&TpmRsp
 215                           );
 216   FreePool (TpmRqu);
 217   if (EFI_ERROR (Status) || (TpmRsp.tag != SwapBytes16 (TPM_TAG_RSP_COMMAND))) {
 218     return TPM_PP_BIOS_FAILURE;
 219   }
 220   return SwapBytes32 (TpmRsp.returnCode);
 221 }
 222
 223 /**
 224   Execute physical presence operation requested by the OS.
 225
 226   @param[in]      TcgProtocol         EFI TCG Protocol instance.
 227   @param[in]      CommandCode         Physical presence operation value.
 228   @param[in, out] PpiFlags            The physical presence interface flags.
 229
 230   @retval TPM_PP_BIOS_FAILURE         Unknown physical presence operation.
 231   @retval TPM_PP_BIOS_FAILURE         Error occurred during sending command to TPM or
 232                                       receiving response from TPM.
 233   @retval Others                      Return code from the TPM device after command execution.
 234
 235 **/
 236 TPM_RESULT
 237 ExecutePhysicalPresence (
 238   IN      EFI_TCG_PROTOCOL          *TcgProtocol,
 239   IN      UINT8                     CommandCode,
 240   IN OUT  UINT8                     *PpiFlags
 241   )
 242 {
 243   BOOLEAN                           BoolVal;
 244   TPM_RESULT                        TpmResponse;
 245   UINT32                            InData[5];
 246
 247   switch (CommandCode) {
 248     case PHYSICAL_PRESENCE_ENABLE:
 249       return TpmCommandNoReturnData (
 250                TcgProtocol,
 251                TPM_ORD_PhysicalEnable,
 252                0,
 253                NULL
 254                );
 255
 256     case PHYSICAL_PRESENCE_DISABLE:
 257       return TpmCommandNoReturnData (
 258                TcgProtocol,
 259                TPM_ORD_PhysicalDisable,
 260                0,
 261                NULL
 262                );
 263
 264     case PHYSICAL_PRESENCE_ACTIVATE:
 265       BoolVal = FALSE;
 266       return TpmCommandNoReturnData (
 267                TcgProtocol,
 268                TPM_ORD_PhysicalSetDeactivated,
 269                sizeof (BoolVal),
 270                &BoolVal
 271                );
 272
 273     case PHYSICAL_PRESENCE_DEACTIVATE:
 274       BoolVal = TRUE;
 275       return TpmCommandNoReturnData (
 276                TcgProtocol,
 277                TPM_ORD_PhysicalSetDeactivated,
 278                sizeof (BoolVal),
 279                &BoolVal
 280                );
 281
 282     case PHYSICAL_PRESENCE_CLEAR:
 283       return TpmCommandNoReturnData (
 284                TcgProtocol,
 285                TPM_ORD_ForceClear,
 286                0,
 287                NULL
 288                );
 289
 290     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE:
 291       TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE, PpiFlags);
 292       if (TpmResponse == 0) {
 293         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ACTIVATE, PpiFlags);
 294       }
 295       return TpmResponse;
 296
 297     case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE:
 298       TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_DEACTIVATE, PpiFlags);
 299       if (TpmResponse == 0) {
 300         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_DISABLE, PpiFlags);
 301       }
 302       return TpmResponse;
 303
 304     case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE:
 305       BoolVal = TRUE;
 306       return TpmCommandNoReturnData (
 307                TcgProtocol,
 308                TPM_ORD_SetOwnerInstall,
 309                sizeof (BoolVal),
 310                &BoolVal
 311                );
 312
 313     case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE:
 314       BoolVal = FALSE;
 315       return TpmCommandNoReturnData (
 316                TcgProtocol,
 317                TPM_ORD_SetOwnerInstall,
 318                sizeof (BoolVal),
 319                &BoolVal
 320                );
 321
 322     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE:
 323       //
 324       // PHYSICAL_PRESENCE_ENABLE_ACTIVATE + PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE
 325       // PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE will be executed after reboot
 326       //
 327       if ((*PpiFlags & FLAG_RESET_TRACK) == 0) {
 328         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE_ACTIVATE, PpiFlags);
 329         *PpiFlags |= FLAG_RESET_TRACK;
 330       } else {
 331         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE, PpiFlags);
 332         *PpiFlags &= ~FLAG_RESET_TRACK;
 333       }
 334       return TpmResponse;
 335
 336     case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE:
 337       TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE, PpiFlags);
 338       if (TpmResponse == 0) {
 339         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_DEACTIVATE_DISABLE, PpiFlags);
 340       }
 341       return TpmResponse;
 342
 343     case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE:
 344       InData[0] = SwapBytes32 (TPM_SET_STCLEAR_DATA);            // CapabilityArea
 345       InData[1] = SwapBytes32 (sizeof(UINT32));                  // SubCapSize
 346       InData[2] = SwapBytes32 (TPM_SD_DEFERREDPHYSICALPRESENCE); // SubCap
 347       InData[3] = SwapBytes32 (sizeof(UINT32));                  // SetValueSize
 348       InData[4] = SwapBytes32 (1);                               // UnownedFieldUpgrade; bit0
 349       return TpmCommandNoReturnData (
 350                TcgProtocol,
 351                TPM_ORD_SetCapability,
 352                sizeof (UINT32) * 5,
 353                InData
 354                );
 355
 356     case PHYSICAL_PRESENCE_SET_OPERATOR_AUTH:
 357       //
 358       // TPM_SetOperatorAuth
 359       // This command requires UI to prompt user for Auth data
 360       // Here it is NOT implemented
 361       //
 362       return TPM_PP_BIOS_FAILURE;
 363
 364     case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE:
 365       TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_CLEAR, PpiFlags);
 366       if (TpmResponse == 0) {
 367         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE_ACTIVATE, PpiFlags);
 368       }
 369       return TpmResponse;
 370
 371     case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_FALSE:
 372       *PpiFlags &= ~FLAG_NO_PPI_PROVISION;
 373       return 0;
 374
 375     case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_TRUE:
 376       *PpiFlags |= FLAG_NO_PPI_PROVISION;
 377       return 0;
 378
 379     case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_FALSE:
 380       *PpiFlags &= ~FLAG_NO_PPI_CLEAR;
 381       return 0;
 382
 383     case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_TRUE:
 384       *PpiFlags |= FLAG_NO_PPI_CLEAR;
 385       return 0;
 386
 387     case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_FALSE:
 388       *PpiFlags &= ~FLAG_NO_PPI_MAINTENANCE;
 389       return 0;
 390
 391     case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_TRUE:
 392       *PpiFlags |= FLAG_NO_PPI_MAINTENANCE;
 393       return 0;
 394
 395     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR:
 396       TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE_ACTIVATE, PpiFlags);
 397       if (TpmResponse == 0) {
 398         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_CLEAR, PpiFlags);
 399       }
 400       return TpmResponse;
 401
 402     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE:
 403       //
 404       // PHYSICAL_PRESENCE_ENABLE_ACTIVATE + PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE
 405       // PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE will be executed atfer reboot.
 406       //
 407       if ((*PpiFlags & FLAG_RESET_TRACK) == 0) {
 408         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE_ACTIVATE, PpiFlags);
 409         *PpiFlags |= FLAG_RESET_TRACK;
 410       } else {
 411         TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE, PpiFlags);
 412         *PpiFlags &= ~FLAG_RESET_TRACK;
 413       }
 414       return TpmResponse;
 415
 416     default:
 417       ;
 418   }
 419   return TPM_PP_BIOS_FAILURE;
 420 }
 421
 422
 423 /**
 424   Read the specified key for user confirmation.
 425
 426   @param[in]  CautionKey  If true,  F12 is used as confirm key;
 427                           If false, F10 is used as confirm key.
 428
 429   @retval     TRUE        User confirmed the changes by input.
 430   @retval     FALSE       User discarded the changes.
 431
 432 **/
 433 BOOLEAN
 434 ReadUserKey (
 435   IN     BOOLEAN                    CautionKey
 436   )
 437 {
 438   EFI_STATUS                        Status;
 439   EFI_INPUT_KEY                     Key;
 440   UINT16                            InputKey;
 441
 442   InputKey = 0;
 443   do {
 444     Status = gBS->CheckEvent (gST->ConIn->WaitForKey);
 445     if (!EFI_ERROR (Status)) {
 446       Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
 447       if (Key.ScanCode == SCAN_ESC) {
 448         InputKey = Key.ScanCode;
 449       }
 450       if ((Key.ScanCode == SCAN_F10) && !CautionKey) {
 451         InputKey = Key.ScanCode;
 452       }
 453       if ((Key.ScanCode == SCAN_F12) && CautionKey) {
 454         InputKey = Key.ScanCode;
 455       }
 456     }
 457   } while (InputKey == 0);
 458
 459   if (InputKey != SCAN_ESC) {
 460     return TRUE;
 461   }
 462
 463   return FALSE;
 464 }
 465
 466 /**
 467   The constructor function register UNI strings into imageHandle.
 468
 469   It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
 470
 471   @param  ImageHandle   The firmware allocated handle for the EFI image.
 472   @param  SystemTable   A pointer to the EFI System Table.
 473
 474   @retval EFI_SUCCESS   The constructor successfully added string package.
 475   @retval Other value   The constructor can't add string package.
 476
 477 **/
 478 EFI_STATUS
 479 EFIAPI
 480 TcgPhysicalPresenceLibConstructor (
 481   IN EFI_HANDLE        ImageHandle,
 482   IN EFI_SYSTEM_TABLE  *SystemTable
 483   )
 484 {
 485   mPpStringPackHandle = HiiAddPackages (&gEfiPhysicalPresenceGuid, ImageHandle, DxeTcgPhysicalPresenceLibStrings, NULL);
 486   ASSERT (mPpStringPackHandle != NULL);
 487
 488   return EFI_SUCCESS;
 489 }
 490
 491 /**
 492   Display the confirm text and get user confirmation.
 493
 494   @param[in] TpmPpCommand  The requested TPM physical presence command.
 495
 496   @retval    TRUE          The user has confirmed the changes.
 497   @retval    FALSE         The user doesn't confirm the changes.
 498 **/
 499 BOOLEAN
 500 UserConfirm (
 501   IN      UINT8                     TpmPpCommand
 502   )
 503 {
 504   CHAR16                            *ConfirmText;
 505   CHAR16                            *TmpStr1;
 506   CHAR16                            *TmpStr2;
 507   UINTN                             BufSize;
 508   BOOLEAN                           CautionKey;
 509   UINT16                            Index;
 510   CHAR16                            DstStr[81];
 511
 512   TmpStr2     = NULL;
 513   CautionKey  = FALSE;
 514   BufSize     = CONFIRM_BUFFER_SIZE;
 515   ConfirmText = AllocateZeroPool (BufSize);
 516   ASSERT (ConfirmText != NULL);
 517
 518   switch (TpmPpCommand) {
 519     case PHYSICAL_PRESENCE_ENABLE:
 520       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ENABLE));
 521
 522       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 523       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 524       FreePool (TmpStr1);
 525
 526       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 527       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 528       FreePool (TmpStr1);
 529       break;
 530
 531     case PHYSICAL_PRESENCE_DISABLE:
 532       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_DISABLE));
 533
 534       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 535       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 536       FreePool (TmpStr1);
 537
 538       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING));
 539       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 540       FreePool (TmpStr1);
 541
 542       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 543       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 544       FreePool (TmpStr1);
 545       break;
 546
 547     case PHYSICAL_PRESENCE_ACTIVATE:
 548       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACTIVATE));
 549
 550       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 551       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 552       FreePool (TmpStr1);
 553
 554       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 555       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 556       FreePool (TmpStr1);
 557       break;
 558
 559     case PHYSICAL_PRESENCE_DEACTIVATE:
 560       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_DEACTIVATE));
 561
 562       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 563       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 564       FreePool (TmpStr1);
 565
 566       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING));
 567       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 568       FreePool (TmpStr1);
 569
 570       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 571       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 572       FreePool (TmpStr1);
 573       break;
 574
 575     case PHYSICAL_PRESENCE_CLEAR:
 576       CautionKey = TRUE;
 577       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CLEAR));
 578
 579       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 580       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 581       FreePool (TmpStr1);
 582
 583       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR));
 584       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 585       StrnCat (ConfirmText, L" \n\n", (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 586       FreePool (TmpStr1);
 587
 588       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY));
 589       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 590       FreePool (TmpStr1);
 591       break;
 592
 593     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE:
 594       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ENABLE_ACTIVATE));
 595
 596       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 597       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 598       FreePool (TmpStr1);
 599
 600       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_ON));
 601       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 602       FreePool (TmpStr1);
 603
 604       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 605       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 606       FreePool (TmpStr1);
 607       break;
 608
 609     case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE:
 610       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_DEACTIVATE_DISABLE));
 611
 612       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 613       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 614       FreePool (TmpStr1);
 615
 616       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_OFF));
 617       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 618       FreePool (TmpStr1);
 619
 620       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING));
 621       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 622       FreePool (TmpStr1);
 623
 624       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 625       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 626       FreePool (TmpStr1);
 627       break;
 628
 629     case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE:
 630       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ALLOW_TAKE_OWNERSHIP));
 631
 632       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 633       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 634       FreePool (TmpStr1);
 635
 636       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 637       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 638       FreePool (TmpStr1);
 639       break;
 640
 641     case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE:
 642       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_DISALLOW_TAKE_OWNERSHIP));
 643
 644       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 645       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 646       FreePool (TmpStr1);
 647
 648       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 649       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 650       FreePool (TmpStr1);
 651       break;
 652
 653     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE:
 654       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_TURN_ON));
 655
 656       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 657       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 658       FreePool (TmpStr1);
 659
 660       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_ON));
 661       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 662       FreePool (TmpStr1);
 663
 664       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 665       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 666       FreePool (TmpStr1);
 667       break;
 668
 669     case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE:
 670       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_TURN_OFF));
 671
 672       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 673       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 674       FreePool (TmpStr1);
 675
 676       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_OFF));
 677       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 678       FreePool (TmpStr1);
 679
 680       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING));
 681       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 682       FreePool (TmpStr1);
 683
 684       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 685       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 686       FreePool (TmpStr1);
 687       break;
 688
 689     case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE:
 690       CautionKey = TRUE;
 691       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_UNOWNED_FIELD_UPGRADE));
 692
 693       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_UPGRADE_HEAD_STR));
 694       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 695       FreePool (TmpStr1);
 696
 697       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_MAINTAIN));
 698       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 699       FreePool (TmpStr1);
 700
 701       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY));
 702       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 703       FreePool (TmpStr1);
 704       break;
 705
 706     case PHYSICAL_PRESENCE_SET_OPERATOR_AUTH:
 707       //
 708       // TPM_SetOperatorAuth
 709       // This command requires UI to prompt user for Auth data
 710       // Here it is NOT implemented
 711       //
 712       break;
 713
 714     case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE:
 715       CautionKey = TRUE;
 716       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CLEAR_TURN_ON));
 717
 718       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 719       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 720       FreePool (TmpStr1);
 721
 722       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_ON));
 723       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 724       FreePool (TmpStr1);
 725
 726       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR));
 727       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 728       FreePool (TmpStr1);
 729
 730       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR_CONT));
 731       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 732       FreePool (TmpStr1);
 733
 734       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY));
 735       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 736       FreePool (TmpStr1);
 737       break;
 738
 739     case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_TRUE:
 740       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_PROVISION));
 741
 742       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_PPI_HEAD_STR));
 743       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 744       FreePool (TmpStr1);
 745
 746       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY));
 747       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 748       FreePool (TmpStr1);
 749
 750       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_INFO));
 751       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 752       FreePool (TmpStr1);
 753       break;
 754
 755     case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_TRUE:
 756       CautionKey = TRUE;
 757       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CLEAR));
 758
 759       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_PPI_HEAD_STR));
 760       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 761       FreePool (TmpStr1);
 762
 763       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_CLEAR));
 764       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 765       FreePool (TmpStr1);
 766
 767       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR));
 768       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 769       StrnCat (ConfirmText, L" \n\n", (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 770       FreePool (TmpStr1);
 771
 772       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY));
 773       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 774       FreePool (TmpStr1);
 775
 776       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_INFO));
 777       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 778       FreePool (TmpStr1);
 779       break;
 780
 781     case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_TRUE:
 782       CautionKey = TRUE;
 783       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_MAINTAIN));
 784
 785       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_PPI_HEAD_STR));
 786       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 787       FreePool (TmpStr1);
 788
 789       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_MAINTAIN));
 790       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 791       FreePool (TmpStr1);
 792
 793       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY));
 794       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 795       FreePool (TmpStr1);
 796
 797       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_INFO));
 798       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 799       FreePool (TmpStr1);
 800       break;
 801
 802     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR:
 803       CautionKey = TRUE;
 804       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ENABLE_ACTIVATE_CLEAR));
 805
 806       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 807       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 808       FreePool (TmpStr1);
 809
 810       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR));
 811       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 812       StrnCat (ConfirmText, L" \n\n", (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 813       FreePool (TmpStr1);
 814
 815       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY));
 816       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 817       FreePool (TmpStr1);
 818       break;
 819
 820     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE:
 821       CautionKey = TRUE;
 822       TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE));
 823
 824       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR));
 825       UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
 826       FreePool (TmpStr1);
 827
 828       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_ON));
 829       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 830       FreePool (TmpStr1);
 831
 832       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR));
 833       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 834       FreePool (TmpStr1);
 835
 836       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR_CONT));
 837       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 838       FreePool (TmpStr1);
 839
 840       TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY));
 841       StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1);
 842       FreePool (TmpStr1);
 843       break;
 844
 845     default:
 846       ;
 847   }
 848
 849   if (TmpStr2 == NULL) {
 850     FreePool (ConfirmText);
 851     return FALSE;
 852   }
 853
 854   TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_REJECT_KEY));
 855   BufSize -= StrSize (ConfirmText);
 856   UnicodeSPrint (ConfirmText + StrLen (ConfirmText), BufSize, TmpStr1, TmpStr2);
 857
 858   DstStr[80] = L'\0';
 859   for (Index = 0; Index < StrLen (ConfirmText); Index += 80) {
 860     StrnCpy(DstStr, ConfirmText + Index, 80);
 861     Print (DstStr);
 862   }
 863
 864   FreePool (TmpStr1);
 865   FreePool (TmpStr2);
 866   FreePool (ConfirmText);
 867
 868   if (ReadUserKey (CautionKey)) {
 869     return TRUE;
 870   }
 871
 872   return FALSE;
 873 }
 874
 875 /**
 876   Check and execute the requested physical presence command.
 877
 878   @param[in] TcgProtocol          EFI TCG Protocol instance.
 879   @param[in] TcgPpData            Point to the physical presence NV variable.
 880
 881 **/
 882 VOID
 883 ExecutePendingTpmRequest (
 884   IN      EFI_TCG_PROTOCOL          *TcgProtocol,
 885   IN      EFI_PHYSICAL_PRESENCE     *TcgPpData
 886   )
 887 {
 888   EFI_STATUS                        Status;
 889   UINTN                             DataSize;
 890   UINT8                             Flags;
 891   BOOLEAN                           RequestConfirmed;
 892
 893   Flags            = TcgPpData->Flags;
 894   RequestConfirmed = FALSE;
 895   switch (TcgPpData->PPRequest) {
 896     case PHYSICAL_PRESENCE_NO_ACTION:
 897       return;
 898     case PHYSICAL_PRESENCE_ENABLE:
 899     case PHYSICAL_PRESENCE_DISABLE:
 900     case PHYSICAL_PRESENCE_ACTIVATE:
 901     case PHYSICAL_PRESENCE_DEACTIVATE:
 902     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE:
 903     case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE:
 904     case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE:
 905     case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE:
 906     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE:
 907     case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE:
 908     case PHYSICAL_PRESENCE_SET_OPERATOR_AUTH:
 909       if ((Flags & FLAG_NO_PPI_PROVISION) != 0) {
 910         RequestConfirmed = TRUE;
 911       }
 912       break;
 913
 914     case PHYSICAL_PRESENCE_CLEAR:
 915     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR:
 916       if ((Flags & FLAG_NO_PPI_CLEAR) != 0) {
 917         RequestConfirmed = TRUE;
 918       }
 919       break;
 920
 921     case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE:
 922       if ((Flags & FLAG_NO_PPI_MAINTENANCE) != 0) {
 923         RequestConfirmed = TRUE;
 924       }
 925       break;
 926
 927     case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE:
 928     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE:
 929       if ((Flags & FLAG_NO_PPI_CLEAR) != 0 && (Flags & FLAG_NO_PPI_PROVISION) != 0) {
 930         RequestConfirmed = TRUE;
 931       }
 932       break;
 933
 934     case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_FALSE:
 935     case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_FALSE:
 936     case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_FALSE:
 937       RequestConfirmed = TRUE;
 938       break;
 939   }
 940
 941   if ((Flags & FLAG_RESET_TRACK) != 0) {
 942     //
 943     // It had been confirmed in last boot, it doesn't need confirm again.
 944     //
 945     RequestConfirmed = TRUE;
 946   }
 947
 948   if (!RequestConfirmed) {
 949     //
 950     // Print confirm text and wait for approval.
 951     //
 952     RequestConfirmed = UserConfirm (TcgPpData->PPRequest);
 953   }
 954
 955   //
 956   // Execute requested physical presence command
 957   //
 958   TcgPpData->PPResponse = TPM_PP_USER_ABORT;
 959   if (RequestConfirmed) {
 960     TcgPpData->PPResponse = ExecutePhysicalPresence (TcgProtocol, TcgPpData->PPRequest, &TcgPpData->Flags);
 961   }
 962
 963   //
 964   // Clear request
 965   //
 966   if ((TcgPpData->Flags & FLAG_RESET_TRACK) == 0) {
 967     TcgPpData->LastPPRequest = TcgPpData->PPRequest;
 968     TcgPpData->PPRequest = 0;
 969   }
 970
 971   //
 972   // Save changes
 973   //
 974   DataSize = sizeof (EFI_PHYSICAL_PRESENCE);
 975   Status = gRT->SetVariable (
 976                   PHYSICAL_PRESENCE_VARIABLE,
 977                   &gEfiPhysicalPresenceGuid,
 978                   EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
 979                   DataSize,
 980                   TcgPpData
 981                   );
 982   if (EFI_ERROR (Status)) {
 983     return;
 984   }
 985
 986   if (TcgPpData->PPResponse == TPM_PP_USER_ABORT) {
 987     return;
 988   }
 989
 990   //
 991   // Reset system to make new TPM settings in effect
 992   //
 993   switch (TcgPpData->LastPPRequest) {
 994     case PHYSICAL_PRESENCE_ACTIVATE:
 995     case PHYSICAL_PRESENCE_DEACTIVATE:
 996     case PHYSICAL_PRESENCE_CLEAR:
 997     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE:
 998     case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE:
 999     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE:
1000     case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE:
1001     case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE:
1002     case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE:
1003     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR:
1004     case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE:
1005       break;
1006     default:
1007       if (TcgPpData->PPRequest != 0) {
1008         break;
1009       }
1010       return;
1011   }
1012
1013   Print (L"Rebooting system to make TPM settings in effect\n");
1014   gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
1015   ASSERT (FALSE);
1016 }
1017
1018 /**
1019   Check and execute the pending TPM request and Lock TPM.
1020
1021   The TPM request may come from OS or BIOS. This API will display request information and wait
1022   for user confirmation if TPM request exists. The TPM request will be sent to TPM device after
1023   the TPM request is confirmed, and one or more reset may be required to make TPM request to
1024   take effect. At last, it will lock TPM to prevent TPM state change by malware.
1025
1026   This API should be invoked after console in and console out are all ready as they are required
1027   to display request information and get user input to confirm the request. This API should also
1028   be invoked as early as possible as TPM is locked in this function.
1029
1030 **/
1031 VOID
1032 EFIAPI
1033 TcgPhysicalPresenceLibProcessRequest (
1034   VOID
1035   )
1036 {
1037   EFI_STATUS                        Status;
1038   BOOLEAN                           LifetimeLock;
1039   BOOLEAN                           CmdEnable;
1040   UINTN                             DataSize;
1041   EFI_PHYSICAL_PRESENCE             TcgPpData;
1042   EFI_TCG_PROTOCOL                  *TcgProtocol;
1043
1044   Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **)&TcgProtocol);
1045   if (EFI_ERROR (Status)) {
1046     return ;
1047   }
1048
1049   //
1050   // Initialize physical presence variable.
1051   //
1052   DataSize = sizeof (EFI_PHYSICAL_PRESENCE);
1053   Status = gRT->GetVariable (
1054                   PHYSICAL_PRESENCE_VARIABLE,
1055                   &gEfiPhysicalPresenceGuid,
1056                   NULL,
1057                   &DataSize,
1058                   &TcgPpData
1059                   );
1060   if (EFI_ERROR (Status)) {
1061     if (Status == EFI_NOT_FOUND) {
1062       ZeroMem ((VOID*)&TcgPpData, sizeof (TcgPpData));
1063       TcgPpData.Flags |= FLAG_NO_PPI_PROVISION;
1064       DataSize = sizeof (EFI_PHYSICAL_PRESENCE);
1065       Status   = gRT->SetVariable (
1066                         PHYSICAL_PRESENCE_VARIABLE,
1067                         &gEfiPhysicalPresenceGuid,
1068                         EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
1069                         DataSize,
1070                         &TcgPpData
1071                         );
1072     }
1073     ASSERT_EFI_ERROR (Status);
1074   }
1075
1076   DEBUG ((EFI_D_INFO, "[TPM] Flags=%x, PPRequest=%x\n", TcgPpData.Flags, TcgPpData.PPRequest));
1077
1078   Status = GetTpmCapability (TcgProtocol, &LifetimeLock, &CmdEnable);
1079   if (EFI_ERROR (Status)) {
1080     return ;
1081   }
1082
1083   if (!CmdEnable) {
1084     if (LifetimeLock) {
1085       //
1086       // physicalPresenceCMDEnable is locked, can't execute physical presence command.
1087       //
1088       return ;
1089     }
1090     Status = TpmPhysicalPresence (TcgProtocol, TPM_PHYSICAL_PRESENCE_CMD_ENABLE);
1091     if (EFI_ERROR (Status)) {
1092       return ;
1093     }
1094   }
1095
1096   //
1097   // Set operator physical presence flags
1098   //
1099   TpmPhysicalPresence (TcgProtocol, TPM_PHYSICAL_PRESENCE_PRESENT);
1100
1101   //
1102   // Execute pending TPM request.
1103   //
1104   ExecutePendingTpmRequest (TcgProtocol, &TcgPpData);
1105   DEBUG ((EFI_D_INFO, "[TPM] PPResponse = %x\n", TcgPpData.PPResponse));
1106
1107   //
1108   // Lock physical presence.
1109   //
1110   TpmPhysicalPresence (TcgProtocol, TPM_PHYSICAL_PRESENCE_NOTPRESENT | TPM_PHYSICAL_PRESENCE_LOCK);
1111 }
1112