From 607599bf3d054da087529e58883650ad693aad3d Mon Sep 17 00:00:00 2001 From: gdong1 Date: Tue, 27 Sep 2011 08:44:33 +0000 Subject: Implement Tcg physical presence as a library instead of DXE driver in order that TPM can be locked as early as possible. Signed-off-by: gdong1 Reviewed-by: hhtian Reviewed-by: niruiyu Reviewed-by: xdu2 git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12447 6f19259b-4bc3-4df7-8a09-765794883524 --- .../DxeTcgPhysicalPresenceLib.c | 1112 ++++++++++++++++++++ 1 file changed, 1112 insertions(+) create mode 100644 SecurityPkg/Library/DxeTcgPhysicalPresenceLib/DxeTcgPhysicalPresenceLib.c (limited to 'SecurityPkg/Library/DxeTcgPhysicalPresenceLib/DxeTcgPhysicalPresenceLib.c') diff --git a/SecurityPkg/Library/DxeTcgPhysicalPresenceLib/DxeTcgPhysicalPresenceLib.c b/SecurityPkg/Library/DxeTcgPhysicalPresenceLib/DxeTcgPhysicalPresenceLib.c new file mode 100644 index 0000000000..d32cc7aff3 --- /dev/null +++ b/SecurityPkg/Library/DxeTcgPhysicalPresenceLib/DxeTcgPhysicalPresenceLib.c @@ -0,0 +1,1112 @@ +/** @file + + Execute pending TPM requests from OS or BIOS and Lock TPM. + +Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.
+This program and the accompanying materials +are licensed and made available under the terms and conditions of the BSD License +which accompanies this distribution. The full text of the license may be found at +http://opensource.org/licenses/bsd-license.php + +THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define TPM_PP_USER_ABORT ((TPM_RESULT)(-0x10)) +#define TPM_PP_BIOS_FAILURE ((TPM_RESULT)(-0x0f)) +#define CONFIRM_BUFFER_SIZE 4096 + +EFI_HII_HANDLE mPpStringPackHandle; + +/** + Get string by string id from HII Interface. + + @param[in] Id String ID. + + @retval CHAR16 * String from ID. + @retval NULL If error occurs. + +**/ +CHAR16 * +PhysicalPresenceGetStringById ( + IN EFI_STRING_ID Id + ) +{ + return HiiGetString (mPpStringPackHandle, Id, NULL); +} + +/** + Get TPM physical presence permanent flags. + + @param[in] TcgProtocol EFI TCG Protocol instance. + @param[out] LifetimeLock physicalPresenceLifetimeLock permanent flag. + @param[out] CmdEnable physicalPresenceCMDEnable permanent flag. + + @retval EFI_SUCCESS Flags were returns successfully. + @retval other Failed to locate EFI TCG Protocol. + +**/ +EFI_STATUS +GetTpmCapability ( + IN EFI_TCG_PROTOCOL *TcgProtocol, + OUT BOOLEAN *LifetimeLock, + OUT BOOLEAN *CmdEnable + ) +{ + EFI_STATUS Status; + TPM_RQU_COMMAND_HDR *TpmRqu; + TPM_RSP_COMMAND_HDR *TpmRsp; + UINT32 *SendBufPtr; + UINT8 SendBuffer[sizeof (*TpmRqu) + sizeof (UINT32) * 3]; + TPM_PERMANENT_FLAGS *TpmPermanentFlags; + UINT8 RecvBuffer[40]; + + // + // Fill request header + // + TpmRsp = (TPM_RSP_COMMAND_HDR*)RecvBuffer; + TpmRqu = (TPM_RQU_COMMAND_HDR*)SendBuffer; + + TpmRqu->tag = SwapBytes16 (TPM_TAG_RQU_COMMAND); + TpmRqu->paramSize = SwapBytes32 (sizeof (SendBuffer)); + TpmRqu->ordinal = SwapBytes32 (TPM_ORD_GetCapability); + + // + // Set request parameter + // + SendBufPtr = (UINT32*)(TpmRqu + 1); + WriteUnaligned32 (SendBufPtr++, SwapBytes32 (TPM_CAP_FLAG)); + WriteUnaligned32 (SendBufPtr++, SwapBytes32 (sizeof (TPM_CAP_FLAG_PERMANENT))); + WriteUnaligned32 (SendBufPtr, SwapBytes32 (TPM_CAP_FLAG_PERMANENT)); + + Status = TcgProtocol->PassThroughToTpm ( + TcgProtocol, + sizeof (SendBuffer), + (UINT8*)TpmRqu, + sizeof (RecvBuffer), + (UINT8*)&RecvBuffer + ); + ASSERT_EFI_ERROR (Status); + ASSERT (TpmRsp->tag == SwapBytes16 (TPM_TAG_RSP_COMMAND)); + ASSERT (TpmRsp->returnCode == 0); + + TpmPermanentFlags = (TPM_PERMANENT_FLAGS *)&RecvBuffer[sizeof (TPM_RSP_COMMAND_HDR) + sizeof (UINT32)]; + + if (LifetimeLock != NULL) { + *LifetimeLock = TpmPermanentFlags->physicalPresenceLifetimeLock; + } + + if (CmdEnable != NULL) { + *CmdEnable = TpmPermanentFlags->physicalPresenceCMDEnable; + } + + return Status; +} + +/** + Issue TSC_PhysicalPresence command to TPM. + + @param[in] TcgProtocol EFI TCG Protocol instance. + @param[in] PhysicalPresence The state to set the TPM's Physical Presence flags. + + @retval EFI_SUCCESS TPM executed the command successfully. + @retval EFI_SECURITY_VIOLATION TPM returned error when executing the command. + @retval other Failed to locate EFI TCG Protocol. + +**/ +EFI_STATUS +TpmPhysicalPresence ( + IN EFI_TCG_PROTOCOL *TcgProtocol, + IN TPM_PHYSICAL_PRESENCE PhysicalPresence + ) +{ + EFI_STATUS Status; + TPM_RQU_COMMAND_HDR *TpmRqu; + TPM_PHYSICAL_PRESENCE *TpmPp; + TPM_RSP_COMMAND_HDR TpmRsp; + UINT8 Buffer[sizeof (*TpmRqu) + sizeof (*TpmPp)]; + + TpmRqu = (TPM_RQU_COMMAND_HDR*)Buffer; + TpmPp = (TPM_PHYSICAL_PRESENCE*)(TpmRqu + 1); + + TpmRqu->tag = SwapBytes16 (TPM_TAG_RQU_COMMAND); + TpmRqu->paramSize = SwapBytes32 (sizeof (Buffer)); + TpmRqu->ordinal = SwapBytes32 (TSC_ORD_PhysicalPresence); + WriteUnaligned16 (TpmPp, (TPM_PHYSICAL_PRESENCE) SwapBytes16 (PhysicalPresence)); + + Status = TcgProtocol->PassThroughToTpm ( + TcgProtocol, + sizeof (Buffer), + (UINT8*)TpmRqu, + sizeof (TpmRsp), + (UINT8*)&TpmRsp + ); + ASSERT_EFI_ERROR (Status); + ASSERT (TpmRsp.tag == SwapBytes16 (TPM_TAG_RSP_COMMAND)); + if (TpmRsp.returnCode != 0) { + // + // If it fails, some requirements may be needed for this command. + // + return EFI_SECURITY_VIOLATION; + } + + return Status; +} + +/** + Issue a TPM command for which no additional output data will be returned. + + @param[in] TcgProtocol EFI TCG Protocol instance. + @param[in] Ordinal TPM command code. + @param[in] AdditionalParameterSize Additional parameter size. + @param[in] AdditionalParameters Pointer to the Additional paramaters. + + @retval TPM_PP_BIOS_FAILURE Error occurred during sending command to TPM or + receiving response from TPM. + @retval Others Return code from the TPM device after command execution. + +**/ +TPM_RESULT +TpmCommandNoReturnData ( + IN EFI_TCG_PROTOCOL *TcgProtocol, + IN TPM_COMMAND_CODE Ordinal, + IN UINTN AdditionalParameterSize, + IN VOID *AdditionalParameters + ) +{ + EFI_STATUS Status; + TPM_RQU_COMMAND_HDR *TpmRqu; + TPM_RSP_COMMAND_HDR TpmRsp; + UINT32 Size; + + TpmRqu = (TPM_RQU_COMMAND_HDR*) AllocatePool (sizeof (*TpmRqu) + AdditionalParameterSize); + if (TpmRqu == NULL) { + return TPM_PP_BIOS_FAILURE; + } + + TpmRqu->tag = SwapBytes16 (TPM_TAG_RQU_COMMAND); + Size = (UINT32)(sizeof (*TpmRqu) + AdditionalParameterSize); + TpmRqu->paramSize = SwapBytes32 (Size); + TpmRqu->ordinal = SwapBytes32 (Ordinal); + CopyMem (TpmRqu + 1, AdditionalParameters, AdditionalParameterSize); + + Status = TcgProtocol->PassThroughToTpm ( + TcgProtocol, + Size, + (UINT8*)TpmRqu, + (UINT32)sizeof (TpmRsp), + (UINT8*)&TpmRsp + ); + FreePool (TpmRqu); + if (EFI_ERROR (Status) || (TpmRsp.tag != SwapBytes16 (TPM_TAG_RSP_COMMAND))) { + return TPM_PP_BIOS_FAILURE; + } + return SwapBytes32 (TpmRsp.returnCode); +} + +/** + Execute physical presence operation requested by the OS. + + @param[in] TcgProtocol EFI TCG Protocol instance. + @param[in] CommandCode Physical presence operation value. + @param[in, out] PpiFlags The physical presence interface flags. + + @retval TPM_PP_BIOS_FAILURE Unknown physical presence operation. + @retval TPM_PP_BIOS_FAILURE Error occurred during sending command to TPM or + receiving response from TPM. + @retval Others Return code from the TPM device after command execution. + +**/ +TPM_RESULT +ExecutePhysicalPresence ( + IN EFI_TCG_PROTOCOL *TcgProtocol, + IN UINT8 CommandCode, + IN OUT UINT8 *PpiFlags + ) +{ + BOOLEAN BoolVal; + TPM_RESULT TpmResponse; + UINT32 InData[5]; + + switch (CommandCode) { + case PHYSICAL_PRESENCE_ENABLE: + return TpmCommandNoReturnData ( + TcgProtocol, + TPM_ORD_PhysicalEnable, + 0, + NULL + ); + + case PHYSICAL_PRESENCE_DISABLE: + return TpmCommandNoReturnData ( + TcgProtocol, + TPM_ORD_PhysicalDisable, + 0, + NULL + ); + + case PHYSICAL_PRESENCE_ACTIVATE: + BoolVal = FALSE; + return TpmCommandNoReturnData ( + TcgProtocol, + TPM_ORD_PhysicalSetDeactivated, + sizeof (BoolVal), + &BoolVal + ); + + case PHYSICAL_PRESENCE_DEACTIVATE: + BoolVal = TRUE; + return TpmCommandNoReturnData ( + TcgProtocol, + TPM_ORD_PhysicalSetDeactivated, + sizeof (BoolVal), + &BoolVal + ); + + case PHYSICAL_PRESENCE_CLEAR: + return TpmCommandNoReturnData ( + TcgProtocol, + TPM_ORD_ForceClear, + 0, + NULL + ); + + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE: + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE, PpiFlags); + if (TpmResponse == 0) { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ACTIVATE, PpiFlags); + } + return TpmResponse; + + case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE: + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_DEACTIVATE, PpiFlags); + if (TpmResponse == 0) { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_DISABLE, PpiFlags); + } + return TpmResponse; + + case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE: + BoolVal = TRUE; + return TpmCommandNoReturnData ( + TcgProtocol, + TPM_ORD_SetOwnerInstall, + sizeof (BoolVal), + &BoolVal + ); + + case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE: + BoolVal = FALSE; + return TpmCommandNoReturnData ( + TcgProtocol, + TPM_ORD_SetOwnerInstall, + sizeof (BoolVal), + &BoolVal + ); + + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE: + // + // PHYSICAL_PRESENCE_ENABLE_ACTIVATE + PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE + // PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE will be executed after reboot + // + if ((*PpiFlags & FLAG_RESET_TRACK) == 0) { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE_ACTIVATE, PpiFlags); + *PpiFlags |= FLAG_RESET_TRACK; + } else { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE, PpiFlags); + *PpiFlags &= ~FLAG_RESET_TRACK; + } + return TpmResponse; + + case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE: + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE, PpiFlags); + if (TpmResponse == 0) { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_DEACTIVATE_DISABLE, PpiFlags); + } + return TpmResponse; + + case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE: + InData[0] = SwapBytes32 (TPM_SET_STCLEAR_DATA); // CapabilityArea + InData[1] = SwapBytes32 (sizeof(UINT32)); // SubCapSize + InData[2] = SwapBytes32 (TPM_SD_DEFERREDPHYSICALPRESENCE); // SubCap + InData[3] = SwapBytes32 (sizeof(UINT32)); // SetValueSize + InData[4] = SwapBytes32 (1); // UnownedFieldUpgrade; bit0 + return TpmCommandNoReturnData ( + TcgProtocol, + TPM_ORD_SetCapability, + sizeof (UINT32) * 5, + InData + ); + + case PHYSICAL_PRESENCE_SET_OPERATOR_AUTH: + // + // TPM_SetOperatorAuth + // This command requires UI to prompt user for Auth data + // Here it is NOT implemented + // + return TPM_PP_BIOS_FAILURE; + + case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE: + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_CLEAR, PpiFlags); + if (TpmResponse == 0) { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE_ACTIVATE, PpiFlags); + } + return TpmResponse; + + case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_FALSE: + *PpiFlags &= ~FLAG_NO_PPI_PROVISION; + return 0; + + case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_TRUE: + *PpiFlags |= FLAG_NO_PPI_PROVISION; + return 0; + + case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_FALSE: + *PpiFlags &= ~FLAG_NO_PPI_CLEAR; + return 0; + + case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_TRUE: + *PpiFlags |= FLAG_NO_PPI_CLEAR; + return 0; + + case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_FALSE: + *PpiFlags &= ~FLAG_NO_PPI_MAINTENANCE; + return 0; + + case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_TRUE: + *PpiFlags |= FLAG_NO_PPI_MAINTENANCE; + return 0; + + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR: + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE_ACTIVATE, PpiFlags); + if (TpmResponse == 0) { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_CLEAR, PpiFlags); + } + return TpmResponse; + + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE: + // + // PHYSICAL_PRESENCE_ENABLE_ACTIVATE + PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE + // PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE will be executed atfer reboot. + // + if ((*PpiFlags & FLAG_RESET_TRACK) == 0) { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_ENABLE_ACTIVATE, PpiFlags); + *PpiFlags |= FLAG_RESET_TRACK; + } else { + TpmResponse = ExecutePhysicalPresence (TcgProtocol, PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE, PpiFlags); + *PpiFlags &= ~FLAG_RESET_TRACK; + } + return TpmResponse; + + default: + ; + } + return TPM_PP_BIOS_FAILURE; +} + + +/** + Read the specified key for user confirmation. + + @param[in] CautionKey If true, F12 is used as confirm key; + If false, F10 is used as confirm key. + + @retval TRUE User confirmed the changes by input. + @retval FALSE User discarded the changes. + +**/ +BOOLEAN +ReadUserKey ( + IN BOOLEAN CautionKey + ) +{ + EFI_STATUS Status; + EFI_INPUT_KEY Key; + UINT16 InputKey; + + InputKey = 0; + do { + Status = gBS->CheckEvent (gST->ConIn->WaitForKey); + if (!EFI_ERROR (Status)) { + Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key); + if (Key.ScanCode == SCAN_ESC) { + InputKey = Key.ScanCode; + } + if ((Key.ScanCode == SCAN_F10) && !CautionKey) { + InputKey = Key.ScanCode; + } + if ((Key.ScanCode == SCAN_F12) && CautionKey) { + InputKey = Key.ScanCode; + } + } + } while (InputKey == 0); + + if (InputKey != SCAN_ESC) { + return TRUE; + } + + return FALSE; +} + +/** + The constructor function register UNI strings into imageHandle. + + It will ASSERT() if that operation fails and it will always return EFI_SUCCESS. + + @param ImageHandle The firmware allocated handle for the EFI image. + @param SystemTable A pointer to the EFI System Table. + + @retval EFI_SUCCESS The constructor successfully added string package. + @retval Other value The constructor can't add string package. + +**/ +EFI_STATUS +EFIAPI +TcgPhysicalPresenceLibConstructor ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + mPpStringPackHandle = HiiAddPackages (&gEfiPhysicalPresenceGuid, &ImageHandle, DxeTcgPhysicalPresenceLibStrings, NULL); + ASSERT (mPpStringPackHandle != NULL); + + return EFI_SUCCESS; +} + +/** + Display the confirm text and get user confirmation. + + @param[in] TpmPpCommand The requested TPM physical presence command. + + @retval TRUE The user has confirmed the changes. + @retval FALSE The user doesn't confirm the changes. +**/ +BOOLEAN +UserConfirm ( + IN UINT8 TpmPpCommand + ) +{ + CHAR16 *ConfirmText; + CHAR16 *TmpStr1; + CHAR16 *TmpStr2; + UINTN BufSize; + BOOLEAN CautionKey; + UINT16 Index; + CHAR16 DstStr[81]; + + TmpStr2 = NULL; + CautionKey = FALSE; + BufSize = CONFIRM_BUFFER_SIZE; + ConfirmText = AllocateZeroPool (BufSize); + ASSERT (ConfirmText != NULL); + + switch (TpmPpCommand) { + case PHYSICAL_PRESENCE_ENABLE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ENABLE)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_DISABLE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_DISABLE)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_ACTIVATE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACTIVATE)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_DEACTIVATE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_DEACTIVATE)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_CLEAR: + CautionKey = TRUE; + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CLEAR)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + StrnCat (ConfirmText, L" \n\n", (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ENABLE_ACTIVATE)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_ON)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_DEACTIVATE_DISABLE)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_OFF)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ALLOW_TAKE_OWNERSHIP)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_DISALLOW_TAKE_OWNERSHIP)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_TURN_ON)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_ON)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_TURN_OFF)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_OFF)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE: + CautionKey = TRUE; + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_UNOWNED_FIELD_UPGRADE)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_UPGRADE_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_MAINTAIN)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_SET_OPERATOR_AUTH: + // + // TPM_SetOperatorAuth + // This command requires UI to prompt user for Auth data + // Here it is NOT implemented + // + break; + + case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE: + CautionKey = TRUE; + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CLEAR_TURN_ON)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_ON)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR_CONT)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_TRUE: + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_PROVISION)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_PPI_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_INFO)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_TRUE: + CautionKey = TRUE; + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CLEAR)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_PPI_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_CLEAR)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + StrnCat (ConfirmText, L" \n\n", (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_INFO)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_TRUE: + CautionKey = TRUE; + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_MAINTAIN)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_PPI_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_MAINTAIN)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_INFO)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR: + CautionKey = TRUE; + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ENABLE_ACTIVATE_CLEAR)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + StrnCat (ConfirmText, L" \n\n", (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE: + CautionKey = TRUE; + TmpStr2 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE)); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); + UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_ON)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR_CONT)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY)); + StrnCat (ConfirmText, TmpStr1, (BufSize / sizeof (CHAR16 *)) - StrLen (ConfirmText) - 1); + FreePool (TmpStr1); + break; + + default: + ; + } + + if (TmpStr2 == NULL) { + FreePool (ConfirmText); + return FALSE; + } + + TmpStr1 = PhysicalPresenceGetStringById (STRING_TOKEN (TPM_REJECT_KEY)); + BufSize -= StrSize (ConfirmText); + UnicodeSPrint (ConfirmText + StrLen (ConfirmText), BufSize, TmpStr1, TmpStr2); + + DstStr[80] = L'\0'; + for (Index = 0; Index < StrLen (ConfirmText); Index += 80) { + StrnCpy(DstStr, ConfirmText + Index, 80); + Print (DstStr); + } + + FreePool (TmpStr1); + FreePool (TmpStr2); + FreePool (ConfirmText); + + if (ReadUserKey (CautionKey)) { + return TRUE; + } + + return FALSE; +} + +/** + Check and execute the requested physical presence command. + + @param[in] TcgProtocol EFI TCG Protocol instance. + @param[in] TcgPpData Point to the physical presence NV variable. + +**/ +VOID +ExecutePendingTpmRequest ( + IN EFI_TCG_PROTOCOL *TcgProtocol, + IN EFI_PHYSICAL_PRESENCE *TcgPpData + ) +{ + EFI_STATUS Status; + UINTN DataSize; + UINT8 Flags; + BOOLEAN RequestConfirmed; + + Flags = TcgPpData->Flags; + RequestConfirmed = FALSE; + switch (TcgPpData->PPRequest) { + case PHYSICAL_PRESENCE_NO_ACTION: + return; + case PHYSICAL_PRESENCE_ENABLE: + case PHYSICAL_PRESENCE_DISABLE: + case PHYSICAL_PRESENCE_ACTIVATE: + case PHYSICAL_PRESENCE_DEACTIVATE: + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE: + case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE: + case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE: + case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE: + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE: + case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE: + case PHYSICAL_PRESENCE_SET_OPERATOR_AUTH: + if ((Flags & FLAG_NO_PPI_PROVISION) != 0) { + RequestConfirmed = TRUE; + } + break; + + case PHYSICAL_PRESENCE_CLEAR: + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR: + if ((Flags & FLAG_NO_PPI_CLEAR) != 0) { + RequestConfirmed = TRUE; + } + break; + + case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE: + if ((Flags & FLAG_NO_PPI_MAINTENANCE) != 0) { + RequestConfirmed = TRUE; + } + break; + + case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE: + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE: + if ((Flags & FLAG_NO_PPI_CLEAR) != 0 && (Flags & FLAG_NO_PPI_PROVISION) != 0) { + RequestConfirmed = TRUE; + } + break; + + case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_FALSE: + case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_FALSE: + case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_FALSE: + RequestConfirmed = TRUE; + break; + } + + if ((Flags & FLAG_RESET_TRACK) != 0) { + // + // It had been confirmed in last boot, it doesn't need confirm again. + // + RequestConfirmed = TRUE; + } + + if (!RequestConfirmed) { + // + // Print confirm text and wait for approval. + // + RequestConfirmed = UserConfirm (TcgPpData->PPRequest); + } + + // + // Execute requested physical presence command + // + TcgPpData->PPResponse = TPM_PP_USER_ABORT; + if (RequestConfirmed) { + TcgPpData->PPResponse = ExecutePhysicalPresence (TcgProtocol, TcgPpData->PPRequest, &TcgPpData->Flags); + } + + // + // Clear request + // + if ((TcgPpData->Flags & FLAG_RESET_TRACK) == 0) { + TcgPpData->LastPPRequest = TcgPpData->PPRequest; + TcgPpData->PPRequest = 0; + } + + // + // Save changes + // + DataSize = sizeof (EFI_PHYSICAL_PRESENCE); + Status = gRT->SetVariable ( + PHYSICAL_PRESENCE_VARIABLE, + &gEfiPhysicalPresenceGuid, + EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, + DataSize, + TcgPpData + ); + if (EFI_ERROR (Status)) { + return; + } + + if (TcgPpData->PPResponse == TPM_PP_USER_ABORT) { + return; + } + + // + // Reset system to make new TPM settings in effect + // + switch (TcgPpData->LastPPRequest) { + case PHYSICAL_PRESENCE_ACTIVATE: + case PHYSICAL_PRESENCE_DEACTIVATE: + case PHYSICAL_PRESENCE_CLEAR: + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE: + case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE: + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE: + case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE: + case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE: + case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE: + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR: + case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE: + break; + default: + if (TcgPpData->PPRequest != 0) { + break; + } + return; + } + + Print (L"Rebooting system to make TPM settings in effect\n"); + gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL); + ASSERT (FALSE); +} + +/** + Check and execute the pending TPM request and Lock TPM. + + The TPM request may come from OS or BIOS. This API will display request information and wait + for user confirmation if TPM request exists. The TPM request will be sent to TPM device after + the TPM request is confirmed, and one or more reset may be required to make TPM request to + take effect. At last, it will lock TPM to prevent TPM state change by malware. + + This API should be invoked after console in and console out are all ready as they are required + to display request information and get user input to confirm the request. This API should also + be invoked as early as possible as TPM is locked in this function. + +**/ +VOID +EFIAPI +TcgPhysicalPresenceLibProcessRequest ( + VOID + ) +{ + EFI_STATUS Status; + BOOLEAN LifetimeLock; + BOOLEAN CmdEnable; + UINTN DataSize; + EFI_PHYSICAL_PRESENCE TcgPpData; + EFI_TCG_PROTOCOL *TcgProtocol; + + Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **)&TcgProtocol); + if (EFI_ERROR (Status)) { + return ; + } + + // + // Initialize physical presence variable. + // + DataSize = sizeof (EFI_PHYSICAL_PRESENCE); + Status = gRT->GetVariable ( + PHYSICAL_PRESENCE_VARIABLE, + &gEfiPhysicalPresenceGuid, + NULL, + &DataSize, + &TcgPpData + ); + if (EFI_ERROR (Status)) { + if (Status == EFI_NOT_FOUND) { + ZeroMem ((VOID*)&TcgPpData, sizeof (TcgPpData)); + TcgPpData.Flags |= FLAG_NO_PPI_PROVISION; + DataSize = sizeof (EFI_PHYSICAL_PRESENCE); + Status = gRT->SetVariable ( + PHYSICAL_PRESENCE_VARIABLE, + &gEfiPhysicalPresenceGuid, + EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, + DataSize, + &TcgPpData + ); + } + ASSERT_EFI_ERROR (Status); + } + + DEBUG ((EFI_D_INFO, "[TPM] Flags=%x, PPRequest=%x\n", TcgPpData.Flags, TcgPpData.PPRequest)); + + Status = GetTpmCapability (TcgProtocol, &LifetimeLock, &CmdEnable); + if (EFI_ERROR (Status)) { + return ; + } + + if (!CmdEnable) { + if (LifetimeLock) { + // + // physicalPresenceCMDEnable is locked, can't execute physical presence command. + // + return ; + } + Status = TpmPhysicalPresence (TcgProtocol, TPM_PHYSICAL_PRESENCE_CMD_ENABLE); + if (EFI_ERROR (Status)) { + return ; + } + } + + // + // Set operator physical presence flags + // + TpmPhysicalPresence (TcgProtocol, TPM_PHYSICAL_PRESENCE_PRESENT); + + // + // Execute pending TPM request. + // + ExecutePendingTpmRequest (TcgProtocol, &TcgPpData); + DEBUG ((EFI_D_INFO, "[TPM] PPResponse = %x\n", TcgPpData.PPResponse)); + + // + // Lock physical presence. + // + TpmPhysicalPresence (TcgProtocol, TPM_PHYSICAL_PRESENCE_NOTPRESENT | TPM_PHYSICAL_PRESENCE_LOCK); +} + -- cgit v1.2.3