| /** @file | |
| Execute pending TPM2 requests from OS or BIOS. | |
| Caution: This module requires additional review when modified. | |
| This driver will have external input - variable. | |
| This external input must be validated carefully to avoid security issue. | |
| Tpm2ExecutePendingTpmRequest() will receive untrusted input and do validation. | |
| Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR> | |
| 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 <PiDxe.h> | |
| #include <Protocol/Tcg2Protocol.h> | |
| #include <Protocol/VariableLock.h> | |
| #include <Library/DebugLib.h> | |
| #include <Library/BaseMemoryLib.h> | |
| #include <Library/UefiRuntimeServicesTableLib.h> | |
| #include <Library/UefiDriverEntryPoint.h> | |
| #include <Library/UefiBootServicesTableLib.h> | |
| #include <Library/UefiLib.h> | |
| #include <Library/MemoryAllocationLib.h> | |
| #include <Library/PrintLib.h> | |
| #include <Library/HiiLib.h> | |
| #include <Library/HobLib.h> | |
| #include <Guid/EventGroup.h> | |
| #include <Guid/Tcg2PhysicalPresenceData.h> | |
| #include <Library/Tpm2CommandLib.h> | |
| #include <Library/Tcg2PhysicalPresenceLib.h> | |
| #include <Library/Tcg2PpVendorLib.h> | |
| #define CONFIRM_BUFFER_SIZE 4096 | |
| EFI_HII_HANDLE mTcg2PpStringPackHandle; | |
| /** | |
| Get string by string id from HII Interface. | |
| @param[in] Id String ID. | |
| @retval CHAR16 * String from ID. | |
| @retval NULL If error occurs. | |
| **/ | |
| CHAR16 * | |
| Tcg2PhysicalPresenceGetStringById ( | |
| IN EFI_STRING_ID Id | |
| ) | |
| { | |
| return HiiGetString (mTcg2PpStringPackHandle, Id, NULL); | |
| } | |
| /** | |
| Send ClearControl and Clear command to TPM. | |
| @param[in] PlatformAuth platform auth value. NULL means no platform auth change. | |
| @retval EFI_SUCCESS Operation completed successfully. | |
| @retval EFI_TIMEOUT The register can't run into the expected status in time. | |
| @retval EFI_BUFFER_TOO_SMALL Response data buffer is too small. | |
| @retval EFI_DEVICE_ERROR Unexpected device behavior. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| Tpm2CommandClear ( | |
| IN TPM2B_AUTH *PlatformAuth OPTIONAL | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| TPMS_AUTH_COMMAND *AuthSession; | |
| TPMS_AUTH_COMMAND LocalAuthSession; | |
| if (PlatformAuth == NULL) { | |
| AuthSession = NULL; | |
| } else { | |
| AuthSession = &LocalAuthSession; | |
| ZeroMem (&LocalAuthSession, sizeof(LocalAuthSession)); | |
| LocalAuthSession.sessionHandle = TPM_RS_PW; | |
| LocalAuthSession.hmac.size = PlatformAuth->size; | |
| CopyMem (LocalAuthSession.hmac.buffer, PlatformAuth->buffer, PlatformAuth->size); | |
| } | |
| DEBUG ((EFI_D_INFO, "Tpm2ClearControl ... \n")); | |
| Status = Tpm2ClearControl (TPM_RH_PLATFORM, AuthSession, NO); | |
| DEBUG ((EFI_D_INFO, "Tpm2ClearControl - %r\n", Status)); | |
| if (EFI_ERROR (Status)) { | |
| goto Done; | |
| } | |
| DEBUG ((EFI_D_INFO, "Tpm2Clear ... \n")); | |
| Status = Tpm2Clear (TPM_RH_PLATFORM, AuthSession); | |
| DEBUG ((EFI_D_INFO, "Tpm2Clear - %r\n", Status)); | |
| Done: | |
| ZeroMem (&LocalAuthSession.hmac, sizeof(LocalAuthSession.hmac)); | |
| return Status; | |
| } | |
| /** | |
| Change EPS. | |
| @param[in] PlatformAuth platform auth value. NULL means no platform auth change. | |
| @retval EFI_SUCCESS Operation completed successfully. | |
| **/ | |
| EFI_STATUS | |
| Tpm2CommandChangeEps ( | |
| IN TPM2B_AUTH *PlatformAuth OPTIONAL | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| TPMS_AUTH_COMMAND *AuthSession; | |
| TPMS_AUTH_COMMAND LocalAuthSession; | |
| if (PlatformAuth == NULL) { | |
| AuthSession = NULL; | |
| } else { | |
| AuthSession = &LocalAuthSession; | |
| ZeroMem (&LocalAuthSession, sizeof(LocalAuthSession)); | |
| LocalAuthSession.sessionHandle = TPM_RS_PW; | |
| LocalAuthSession.hmac.size = PlatformAuth->size; | |
| CopyMem (LocalAuthSession.hmac.buffer, PlatformAuth->buffer, PlatformAuth->size); | |
| } | |
| Status = Tpm2ChangeEPS (TPM_RH_PLATFORM, AuthSession); | |
| DEBUG ((EFI_D_INFO, "Tpm2ChangeEPS - %r\n", Status)); | |
| ZeroMem(&LocalAuthSession.hmac, sizeof(LocalAuthSession.hmac)); | |
| return Status; | |
| } | |
| /** | |
| Execute physical presence operation requested by the OS. | |
| @param[in] PlatformAuth platform auth value. NULL means no platform auth change. | |
| @param[in] CommandCode Physical presence operation value. | |
| @param[in] CommandParameter Physical presence operation parameter. | |
| @param[in, out] PpiFlags The physical presence interface flags. | |
| @retval TCG_PP_OPERATION_RESPONSE_BIOS_FAILURE Unknown physical presence operation. | |
| @retval TCG_PP_OPERATION_RESPONSE_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. | |
| **/ | |
| UINT32 | |
| Tcg2ExecutePhysicalPresence ( | |
| IN TPM2B_AUTH *PlatformAuth, OPTIONAL | |
| IN UINT32 CommandCode, | |
| IN UINT32 CommandParameter, | |
| IN OUT EFI_TCG2_PHYSICAL_PRESENCE_FLAGS *PpiFlags | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_TCG2_PROTOCOL *Tcg2Protocol; | |
| EFI_TCG2_BOOT_SERVICE_CAPABILITY ProtocolCapability; | |
| Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &Tcg2Protocol); | |
| ASSERT_EFI_ERROR (Status); | |
| ProtocolCapability.Size = sizeof(ProtocolCapability); | |
| Status = Tcg2Protocol->GetCapability ( | |
| Tcg2Protocol, | |
| &ProtocolCapability | |
| ); | |
| ASSERT_EFI_ERROR (Status); | |
| switch (CommandCode) { | |
| case TCG2_PHYSICAL_PRESENCE_CLEAR: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR_2: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR_3: | |
| Status = Tpm2CommandClear (PlatformAuth); | |
| if (EFI_ERROR (Status)) { | |
| return TCG_PP_OPERATION_RESPONSE_BIOS_FAILURE; | |
| } else { | |
| return TCG_PP_OPERATION_RESPONSE_SUCCESS; | |
| } | |
| case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_CLEAR_TRUE: | |
| PpiFlags->PPFlags |= TCG2_BIOS_TPM_MANAGEMENT_FLAG_PP_REQUIRED_FOR_CLEAR; | |
| return TCG_PP_OPERATION_RESPONSE_SUCCESS; | |
| case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_CLEAR_FALSE: | |
| PpiFlags->PPFlags &= ~TCG2_BIOS_TPM_MANAGEMENT_FLAG_PP_REQUIRED_FOR_CLEAR; | |
| return TCG_PP_OPERATION_RESPONSE_SUCCESS; | |
| case TCG2_PHYSICAL_PRESENCE_SET_PCR_BANKS: | |
| Status = Tpm2PcrAllocateBanks (PlatformAuth, ProtocolCapability.HashAlgorithmBitmap, CommandParameter); | |
| if (EFI_ERROR (Status)) { | |
| return TCG_PP_OPERATION_RESPONSE_BIOS_FAILURE; | |
| } else { | |
| return TCG_PP_OPERATION_RESPONSE_SUCCESS; | |
| } | |
| case TCG2_PHYSICAL_PRESENCE_CHANGE_EPS: | |
| Status = Tpm2CommandChangeEps (PlatformAuth); | |
| if (EFI_ERROR (Status)) { | |
| return TCG_PP_OPERATION_RESPONSE_BIOS_FAILURE; | |
| } else { | |
| return TCG_PP_OPERATION_RESPONSE_SUCCESS; | |
| } | |
| case TCG2_PHYSICAL_PRESENCE_LOG_ALL_DIGESTS: | |
| Status = Tpm2PcrAllocateBanks (PlatformAuth, ProtocolCapability.HashAlgorithmBitmap, ProtocolCapability.HashAlgorithmBitmap); | |
| if (EFI_ERROR (Status)) { | |
| return TCG_PP_OPERATION_RESPONSE_BIOS_FAILURE; | |
| } else { | |
| return TCG_PP_OPERATION_RESPONSE_SUCCESS; | |
| } | |
| default: | |
| if (CommandCode <= TCG2_PHYSICAL_PRESENCE_NO_ACTION_MAX) { | |
| return TCG_PP_OPERATION_RESPONSE_SUCCESS; | |
| } else { | |
| return TCG_PP_OPERATION_RESPONSE_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 | |
| Tcg2ReadUserKey ( | |
| 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; | |
| } | |
| /** | |
| Fill Buffer With BootHashAlg. | |
| @param[in] Buffer Buffer to be filled. | |
| @param[in] BufferSize Size of buffer. | |
| @param[in] BootHashAlg BootHashAlg. | |
| **/ | |
| VOID | |
| Tcg2FillBufferWithBootHashAlg ( | |
| IN UINT16 *Buffer, | |
| IN UINTN BufferSize, | |
| IN UINT32 BootHashAlg | |
| ) | |
| { | |
| Buffer[0] = 0; | |
| if ((BootHashAlg & EFI_TCG2_BOOT_HASH_ALG_SHA1) != 0) { | |
| if (Buffer[0] != 0) { | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L", ", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L"SHA1", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| if ((BootHashAlg & EFI_TCG2_BOOT_HASH_ALG_SHA256) != 0) { | |
| if (Buffer[0] != 0) { | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L", ", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L"SHA256", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| if ((BootHashAlg & EFI_TCG2_BOOT_HASH_ALG_SHA384) != 0) { | |
| if (Buffer[0] != 0) { | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L", ", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L"SHA384", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| if ((BootHashAlg & EFI_TCG2_BOOT_HASH_ALG_SHA512) != 0) { | |
| if (Buffer[0] != 0) { | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L", ", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L"SHA512", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| if ((BootHashAlg & EFI_TCG2_BOOT_HASH_ALG_SM3_256) != 0) { | |
| if (Buffer[0] != 0) { | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L", ", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| StrnCatS (Buffer, BufferSize / sizeof (CHAR16), L"SM3_256", (BufferSize / sizeof (CHAR16)) - StrLen (Buffer) - 1); | |
| } | |
| } | |
| /** | |
| Display the confirm text and get user confirmation. | |
| @param[in] TpmPpCommand The requested TPM physical presence command. | |
| @param[in] TpmPpCommandParameter The requested TPM physical presence command parameter. | |
| @retval TRUE The user has confirmed the changes. | |
| @retval FALSE The user doesn't confirm the changes. | |
| **/ | |
| BOOLEAN | |
| Tcg2UserConfirm ( | |
| IN UINT32 TpmPpCommand, | |
| IN UINT32 TpmPpCommandParameter | |
| ) | |
| { | |
| CHAR16 *ConfirmText; | |
| CHAR16 *TmpStr1; | |
| CHAR16 *TmpStr2; | |
| UINTN BufSize; | |
| BOOLEAN CautionKey; | |
| BOOLEAN NoPpiInfo; | |
| UINT16 Index; | |
| CHAR16 DstStr[81]; | |
| CHAR16 TempBuffer[1024]; | |
| CHAR16 TempBuffer2[1024]; | |
| EFI_TCG2_PROTOCOL *Tcg2Protocol; | |
| EFI_TCG2_BOOT_SERVICE_CAPABILITY ProtocolCapability; | |
| UINT32 CurrentPCRBanks; | |
| EFI_STATUS Status; | |
| Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &Tcg2Protocol); | |
| ASSERT_EFI_ERROR (Status); | |
| ProtocolCapability.Size = sizeof(ProtocolCapability); | |
| Status = Tcg2Protocol->GetCapability ( | |
| Tcg2Protocol, | |
| &ProtocolCapability | |
| ); | |
| ASSERT_EFI_ERROR (Status); | |
| Status = Tcg2Protocol->GetActivePcrBanks ( | |
| Tcg2Protocol, | |
| &CurrentPCRBanks | |
| ); | |
| ASSERT_EFI_ERROR (Status); | |
| TmpStr2 = NULL; | |
| CautionKey = FALSE; | |
| NoPpiInfo = FALSE; | |
| BufSize = CONFIRM_BUFFER_SIZE; | |
| ConfirmText = AllocateZeroPool (BufSize); | |
| ASSERT (ConfirmText != NULL); | |
| switch (TpmPpCommand) { | |
| case TCG2_PHYSICAL_PRESENCE_CLEAR: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR_2: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR_3: | |
| CautionKey = TRUE; | |
| TmpStr2 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CLEAR)); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); | |
| UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); | |
| FreePool (TmpStr1); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), L" \n\n", (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| break; | |
| case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_CLEAR_FALSE: | |
| CautionKey = TRUE; | |
| NoPpiInfo = TRUE; | |
| TmpStr2 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CLEAR)); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_PPI_HEAD_STR)); | |
| UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); | |
| FreePool (TmpStr1); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NOTE_CLEAR)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CLEAR)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), L" \n\n", (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| break; | |
| case TCG2_PHYSICAL_PRESENCE_SET_PCR_BANKS: | |
| CautionKey = TRUE; | |
| TmpStr2 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_SET_PCR_BANKS)); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); | |
| UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); | |
| FreePool (TmpStr1); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_SET_PCR_BANKS_1)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_SET_PCR_BANKS_2)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| Tcg2FillBufferWithBootHashAlg (TempBuffer, sizeof(TempBuffer), TpmPpCommandParameter); | |
| Tcg2FillBufferWithBootHashAlg (TempBuffer2, sizeof(TempBuffer2), CurrentPCRBanks); | |
| TmpStr1 = AllocateZeroPool (BufSize); | |
| ASSERT (TmpStr1 != NULL); | |
| UnicodeSPrint (TmpStr1, BufSize, L"Current PCRBanks is 0x%x. (%s)\nNew PCRBanks is 0x%x. (%s)\n", CurrentPCRBanks, TempBuffer2, TpmPpCommandParameter, TempBuffer); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), L" \n", (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| break; | |
| case TCG2_PHYSICAL_PRESENCE_CHANGE_EPS: | |
| CautionKey = TRUE; | |
| TmpStr2 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CHANGE_EPS)); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_HEAD_STR)); | |
| UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2); | |
| FreePool (TmpStr1); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CHANGE_EPS_1)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_WARNING_CHANGE_EPS_2)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| break; | |
| default: | |
| ; | |
| } | |
| if (TmpStr2 == NULL) { | |
| FreePool (ConfirmText); | |
| return FALSE; | |
| } | |
| if (TpmPpCommand < TCG2_PHYSICAL_PRESENCE_STORAGE_MANAGEMENT_BEGIN) { | |
| if (CautionKey) { | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_CAUTION_KEY)); | |
| } else { | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_ACCEPT_KEY)); | |
| } | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| if (NoPpiInfo) { | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_NO_PPI_INFO)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| } | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TPM_REJECT_KEY)); | |
| } else { | |
| if (CautionKey) { | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_CAUTION_KEY)); | |
| } else { | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_ACCEPT_KEY)); | |
| } | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| if (NoPpiInfo) { | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_NO_PPI_INFO)); | |
| StrnCatS (ConfirmText, BufSize / sizeof (CHAR16), TmpStr1, (BufSize / sizeof (CHAR16)) - StrLen (ConfirmText) - 1); | |
| FreePool (TmpStr1); | |
| } | |
| TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_REJECT_KEY)); | |
| } | |
| BufSize -= StrSize (ConfirmText); | |
| UnicodeSPrint (ConfirmText + StrLen (ConfirmText), BufSize, TmpStr1, TmpStr2); | |
| DstStr[80] = L'\0'; | |
| for (Index = 0; Index < StrLen (ConfirmText); Index += 80) { | |
| StrnCpyS (DstStr, sizeof (DstStr) / sizeof (CHAR16), ConfirmText + Index, sizeof (DstStr) / sizeof (CHAR16) - 1); | |
| Print (DstStr); | |
| } | |
| FreePool (TmpStr1); | |
| FreePool (TmpStr2); | |
| FreePool (ConfirmText); | |
| if (Tcg2ReadUserKey (CautionKey)) { | |
| return TRUE; | |
| } | |
| return FALSE; | |
| } | |
| /** | |
| Check if there is a valid physical presence command request. Also updates parameter value | |
| to whether the requested physical presence command already confirmed by user | |
| @param[in] TcgPpData EFI Tcg2 Physical Presence request data. | |
| @param[in] Flags The physical presence interface flags. | |
| @param[out] RequestConfirmed If the physical presence operation command required user confirm from UI. | |
| True, it indicates the command doesn't require user confirm, or already confirmed | |
| in last boot cycle by user. | |
| False, it indicates the command need user confirm from UI. | |
| @retval TRUE Physical Presence operation command is valid. | |
| @retval FALSE Physical Presence operation command is invalid. | |
| **/ | |
| BOOLEAN | |
| Tcg2HaveValidTpmRequest ( | |
| IN EFI_TCG2_PHYSICAL_PRESENCE *TcgPpData, | |
| IN EFI_TCG2_PHYSICAL_PRESENCE_FLAGS Flags, | |
| OUT BOOLEAN *RequestConfirmed | |
| ) | |
| { | |
| BOOLEAN IsRequestValid; | |
| *RequestConfirmed = FALSE; | |
| switch (TcgPpData->PPRequest) { | |
| case TCG2_PHYSICAL_PRESENCE_NO_ACTION: | |
| *RequestConfirmed = TRUE; | |
| return TRUE; | |
| case TCG2_PHYSICAL_PRESENCE_CLEAR: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR_2: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR_3: | |
| if ((Flags.PPFlags & TCG2_BIOS_TPM_MANAGEMENT_FLAG_PP_REQUIRED_FOR_CLEAR) == 0) { | |
| *RequestConfirmed = TRUE; | |
| } | |
| break; | |
| case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_CLEAR_TRUE: | |
| *RequestConfirmed = TRUE; | |
| break; | |
| case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_CLEAR_FALSE: | |
| break; | |
| case TCG2_PHYSICAL_PRESENCE_SET_PCR_BANKS: | |
| if ((Flags.PPFlags & TCG2_BIOS_TPM_MANAGEMENT_FLAG_PP_REQUIRED_FOR_CHANGE_PCRS) == 0) { | |
| *RequestConfirmed = TRUE; | |
| } | |
| break; | |
| case TCG2_PHYSICAL_PRESENCE_CHANGE_EPS: | |
| if ((Flags.PPFlags & TCG2_BIOS_TPM_MANAGEMENT_FLAG_PP_REQUIRED_FOR_CHANGE_EPS) == 0) { | |
| *RequestConfirmed = TRUE; | |
| } | |
| break; | |
| case TCG2_PHYSICAL_PRESENCE_LOG_ALL_DIGESTS: | |
| *RequestConfirmed = TRUE; | |
| break; | |
| default: | |
| if (TcgPpData->PPRequest >= TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) { | |
| IsRequestValid = Tcg2PpVendorLibHasValidRequest (TcgPpData->PPRequest, Flags.PPFlags, RequestConfirmed); | |
| if (!IsRequestValid) { | |
| return FALSE; | |
| } else { | |
| break; | |
| } | |
| } else { | |
| // | |
| // Wrong Physical Presence command | |
| // | |
| return FALSE; | |
| } | |
| } | |
| if ((Flags.PPFlags & TCG2_LIB_PP_FLAG_RESET_TRACK) != 0) { | |
| // | |
| // It had been confirmed in last boot, it doesn't need confirm again. | |
| // | |
| *RequestConfirmed = TRUE; | |
| } | |
| // | |
| // Physical Presence command is correct | |
| // | |
| return TRUE; | |
| } | |
| /** | |
| Check and execute the requested physical presence command. | |
| Caution: This function may receive untrusted input. | |
| TcgPpData variable is external input, so this function will validate | |
| its data structure to be valid value. | |
| @param[in] PlatformAuth platform auth value. NULL means no platform auth change. | |
| @param[in] TcgPpData Point to the physical presence NV variable. | |
| @param[in] Flags The physical presence interface flags. | |
| **/ | |
| VOID | |
| Tcg2ExecutePendingTpmRequest ( | |
| IN TPM2B_AUTH *PlatformAuth, OPTIONAL | |
| IN EFI_TCG2_PHYSICAL_PRESENCE *TcgPpData, | |
| IN EFI_TCG2_PHYSICAL_PRESENCE_FLAGS Flags | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| UINTN DataSize; | |
| BOOLEAN RequestConfirmed; | |
| EFI_TCG2_PHYSICAL_PRESENCE_FLAGS NewFlags; | |
| BOOLEAN ResetRequired; | |
| UINT32 NewPPFlags; | |
| if (TcgPpData->PPRequest == TCG2_PHYSICAL_PRESENCE_NO_ACTION) { | |
| // | |
| // No operation request | |
| // | |
| return; | |
| } | |
| if (!Tcg2HaveValidTpmRequest(TcgPpData, Flags, &RequestConfirmed)) { | |
| // | |
| // Invalid operation request. | |
| // | |
| if (TcgPpData->PPRequest <= TCG2_PHYSICAL_PRESENCE_NO_ACTION_MAX) { | |
| TcgPpData->PPResponse = TCG_PP_OPERATION_RESPONSE_SUCCESS; | |
| } else { | |
| TcgPpData->PPResponse = TCG_PP_OPERATION_RESPONSE_BIOS_FAILURE; | |
| } | |
| TcgPpData->LastPPRequest = TcgPpData->PPRequest; | |
| TcgPpData->PPRequest = TCG2_PHYSICAL_PRESENCE_NO_ACTION; | |
| TcgPpData->PPRequestParameter = 0; | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE); | |
| Status = gRT->SetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, | |
| DataSize, | |
| TcgPpData | |
| ); | |
| return; | |
| } | |
| ResetRequired = FALSE; | |
| if (TcgPpData->PPRequest >= TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) { | |
| NewFlags = Flags; | |
| NewPPFlags = NewFlags.PPFlags; | |
| TcgPpData->PPResponse = Tcg2PpVendorLibExecutePendingRequest (PlatformAuth, TcgPpData->PPRequest, &NewPPFlags, &ResetRequired); | |
| NewFlags.PPFlags = NewPPFlags; | |
| } else { | |
| if (!RequestConfirmed) { | |
| // | |
| // Print confirm text and wait for approval. | |
| // | |
| RequestConfirmed = Tcg2UserConfirm (TcgPpData->PPRequest, TcgPpData->PPRequestParameter); | |
| } | |
| // | |
| // Execute requested physical presence command | |
| // | |
| TcgPpData->PPResponse = TCG_PP_OPERATION_RESPONSE_USER_ABORT; | |
| NewFlags = Flags; | |
| if (RequestConfirmed) { | |
| TcgPpData->PPResponse = Tcg2ExecutePhysicalPresence ( | |
| PlatformAuth, | |
| TcgPpData->PPRequest, | |
| TcgPpData->PPRequestParameter, | |
| &NewFlags | |
| ); | |
| } | |
| } | |
| // | |
| // Save the flags if it is updated. | |
| // | |
| if (CompareMem (&Flags, &NewFlags, sizeof(EFI_TCG2_PHYSICAL_PRESENCE_FLAGS)) != 0) { | |
| Status = gRT->SetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, | |
| sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS), | |
| &NewFlags | |
| ); | |
| } | |
| // | |
| // Clear request | |
| // | |
| if ((NewFlags.PPFlags & TCG2_LIB_PP_FLAG_RESET_TRACK) == 0) { | |
| TcgPpData->LastPPRequest = TcgPpData->PPRequest; | |
| TcgPpData->PPRequest = TCG2_PHYSICAL_PRESENCE_NO_ACTION; | |
| TcgPpData->PPRequestParameter = 0; | |
| } | |
| // | |
| // Save changes | |
| // | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE); | |
| Status = gRT->SetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, | |
| DataSize, | |
| TcgPpData | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return; | |
| } | |
| if (TcgPpData->PPResponse == TCG_PP_OPERATION_RESPONSE_USER_ABORT) { | |
| return; | |
| } | |
| // | |
| // Reset system to make new TPM settings in effect | |
| // | |
| switch (TcgPpData->LastPPRequest) { | |
| case TCG2_PHYSICAL_PRESENCE_CLEAR: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR_2: | |
| case TCG2_PHYSICAL_PRESENCE_ENABLE_CLEAR_3: | |
| case TCG2_PHYSICAL_PRESENCE_SET_PCR_BANKS: | |
| case TCG2_PHYSICAL_PRESENCE_CHANGE_EPS: | |
| case TCG2_PHYSICAL_PRESENCE_LOG_ALL_DIGESTS: | |
| break; | |
| default: | |
| if (TcgPpData->LastPPRequest >= TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) { | |
| if (ResetRequired) { | |
| break; | |
| } else { | |
| return ; | |
| } | |
| } | |
| if (TcgPpData->PPRequest != TCG2_PHYSICAL_PRESENCE_NO_ACTION) { | |
| break; | |
| } | |
| return; | |
| } | |
| Print (L"Rebooting system to make TPM2 settings in effect\n"); | |
| gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL); | |
| ASSERT (FALSE); | |
| } | |
| /** | |
| Check and execute the pending TPM request. | |
| 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. | |
| 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. | |
| @param[in] PlatformAuth platform auth value. NULL means no platform auth change. | |
| **/ | |
| VOID | |
| EFIAPI | |
| Tcg2PhysicalPresenceLibProcessRequest ( | |
| IN TPM2B_AUTH *PlatformAuth OPTIONAL | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| UINTN DataSize; | |
| EFI_TCG2_PHYSICAL_PRESENCE TcgPpData; | |
| EFI_TCG2_PROTOCOL *Tcg2Protocol; | |
| EDKII_VARIABLE_LOCK_PROTOCOL *VariableLockProtocol; | |
| EFI_TCG2_PHYSICAL_PRESENCE_FLAGS PpiFlags; | |
| Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &Tcg2Protocol); | |
| if (EFI_ERROR (Status)) { | |
| return ; | |
| } | |
| // | |
| // Check S4 resume | |
| // | |
| if (GetBootModeHob () == BOOT_ON_S4_RESUME) { | |
| DEBUG ((EFI_D_INFO, "S4 Resume, Skip TPM PP process!\n")); | |
| return ; | |
| } | |
| mTcg2PpStringPackHandle = HiiAddPackages (&gEfiTcg2PhysicalPresenceGuid, gImageHandle, DxeTcg2PhysicalPresenceLibStrings, NULL); | |
| ASSERT (mTcg2PpStringPackHandle != NULL); | |
| // | |
| // Initialize physical presence flags. | |
| // | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS); | |
| Status = gRT->GetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| NULL, | |
| &DataSize, | |
| &PpiFlags | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| PpiFlags.PPFlags = TCG2_BIOS_TPM_MANAGEMENT_FLAG_DEFAULT; | |
| Status = gRT->SetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, | |
| sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS), | |
| &PpiFlags | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| DEBUG ((EFI_D_ERROR, "[TPM2] Set physical presence flag failed, Status = %r\n", Status)); | |
| return ; | |
| } | |
| } | |
| DEBUG ((EFI_D_INFO, "[TPM2] PpiFlags = %x\n", PpiFlags.PPFlags)); | |
| // | |
| // This flags variable controls whether physical presence is required for TPM command. | |
| // It should be protected from malicious software. We set it as read-only variable here. | |
| // | |
| Status = gBS->LocateProtocol (&gEdkiiVariableLockProtocolGuid, NULL, (VOID **)&VariableLockProtocol); | |
| if (!EFI_ERROR (Status)) { | |
| Status = VariableLockProtocol->RequestToLock ( | |
| VariableLockProtocol, | |
| TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| DEBUG ((EFI_D_ERROR, "[TPM2] Error when lock variable %s, Status = %r\n", TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, Status)); | |
| ASSERT_EFI_ERROR (Status); | |
| } | |
| } | |
| // | |
| // Initialize physical presence variable. | |
| // | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE); | |
| Status = gRT->GetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| NULL, | |
| &DataSize, | |
| &TcgPpData | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| ZeroMem ((VOID*)&TcgPpData, sizeof (TcgPpData)); | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE); | |
| Status = gRT->SetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, | |
| DataSize, | |
| &TcgPpData | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| DEBUG ((EFI_D_ERROR, "[TPM2] Set physical presence variable failed, Status = %r\n", Status)); | |
| return ; | |
| } | |
| } | |
| DEBUG ((EFI_D_INFO, "[TPM2] Flags=%x, PPRequest=%x (LastPPRequest=%x)\n", PpiFlags.PPFlags, TcgPpData.PPRequest, TcgPpData.LastPPRequest)); | |
| // | |
| // Execute pending TPM request. | |
| // | |
| Tcg2ExecutePendingTpmRequest (PlatformAuth, &TcgPpData, PpiFlags); | |
| DEBUG ((EFI_D_INFO, "[TPM2] PPResponse = %x (LastPPRequest=%x, Flags=%x)\n", TcgPpData.PPResponse, TcgPpData.LastPPRequest, PpiFlags.PPFlags)); | |
| } | |
| /** | |
| Check if the pending TPM request needs user input to confirm. | |
| The TPM request may come from OS. This API will check if TPM request exists and need user | |
| input to confirmation. | |
| @retval TRUE TPM needs input to confirm user physical presence. | |
| @retval FALSE TPM doesn't need input to confirm user physical presence. | |
| **/ | |
| BOOLEAN | |
| EFIAPI | |
| Tcg2PhysicalPresenceLibNeedUserConfirm( | |
| VOID | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_TCG2_PHYSICAL_PRESENCE TcgPpData; | |
| UINTN DataSize; | |
| BOOLEAN RequestConfirmed; | |
| EFI_TCG2_PROTOCOL *Tcg2Protocol; | |
| EFI_TCG2_PHYSICAL_PRESENCE_FLAGS PpiFlags; | |
| Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &Tcg2Protocol); | |
| if (EFI_ERROR (Status)) { | |
| return FALSE; | |
| } | |
| // | |
| // Check S4 resume | |
| // | |
| if (GetBootModeHob () == BOOT_ON_S4_RESUME) { | |
| DEBUG ((EFI_D_INFO, "S4 Resume, Skip TPM PP process!\n")); | |
| return FALSE; | |
| } | |
| // | |
| // Check Tpm requests | |
| // | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE); | |
| Status = gRT->GetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| NULL, | |
| &DataSize, | |
| &TcgPpData | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return FALSE; | |
| } | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS); | |
| Status = gRT->GetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| NULL, | |
| &DataSize, | |
| &PpiFlags | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return FALSE; | |
| } | |
| if (TcgPpData.PPRequest == TCG2_PHYSICAL_PRESENCE_NO_ACTION) { | |
| // | |
| // No operation request | |
| // | |
| return FALSE; | |
| } | |
| if (!Tcg2HaveValidTpmRequest(&TcgPpData, PpiFlags, &RequestConfirmed)) { | |
| // | |
| // Invalid operation request. | |
| // | |
| return FALSE; | |
| } | |
| if (!RequestConfirmed) { | |
| // | |
| // Need UI to confirm | |
| // | |
| return TRUE; | |
| } | |
| return FALSE; | |
| } | |
| /** | |
| The handler for TPM physical presence function: | |
| Return TPM Operation Response to OS Environment. | |
| @param[out] MostRecentRequest Most recent operation request. | |
| @param[out] Response Response to the most recent operation request. | |
| @return Return Code for Return TPM Operation Response to OS Environment. | |
| **/ | |
| UINT32 | |
| EFIAPI | |
| Tcg2PhysicalPresenceLibReturnOperationResponseToOsFunction ( | |
| OUT UINT32 *MostRecentRequest, | |
| OUT UINT32 *Response | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| UINTN DataSize; | |
| EFI_TCG2_PHYSICAL_PRESENCE PpData; | |
| DEBUG ((EFI_D_INFO, "[TPM2] ReturnOperationResponseToOsFunction\n")); | |
| // | |
| // Get the Physical Presence variable | |
| // | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE); | |
| Status = gRT->GetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| NULL, | |
| &DataSize, | |
| &PpData | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| *MostRecentRequest = 0; | |
| *Response = 0; | |
| DEBUG ((EFI_D_ERROR, "[TPM2] Get PP variable failure! Status = %r\n", Status)); | |
| return TCG_PP_RETURN_TPM_OPERATION_RESPONSE_FAILURE; | |
| } | |
| *MostRecentRequest = PpData.LastPPRequest; | |
| *Response = PpData.PPResponse; | |
| return TCG_PP_RETURN_TPM_OPERATION_RESPONSE_SUCCESS; | |
| } | |
| /** | |
| The handler for TPM physical presence function: | |
| Submit TPM Operation Request to Pre-OS Environment and | |
| Submit TPM Operation Request to Pre-OS Environment 2. | |
| Caution: This function may receive untrusted input. | |
| @param[in] OperationRequest TPM physical presence operation request. | |
| @param[in] RequestParameter TPM physical presence operation request parameter. | |
| @return Return Code for Submit TPM Operation Request to Pre-OS Environment and | |
| Submit TPM Operation Request to Pre-OS Environment 2. | |
| **/ | |
| UINT32 | |
| EFIAPI | |
| Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction ( | |
| IN UINT32 OperationRequest, | |
| IN UINT32 RequestParameter | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| UINTN DataSize; | |
| EFI_TCG2_PHYSICAL_PRESENCE PpData; | |
| EFI_TCG2_PHYSICAL_PRESENCE_FLAGS Flags; | |
| DEBUG ((EFI_D_INFO, "[TPM2] SubmitRequestToPreOSFunction, Request = %x, %x\n", OperationRequest, RequestParameter)); | |
| // | |
| // Get the Physical Presence variable | |
| // | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE); | |
| Status = gRT->GetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| NULL, | |
| &DataSize, | |
| &PpData | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| DEBUG ((EFI_D_ERROR, "[TPM2] Get PP variable failure! Status = %r\n", Status)); | |
| return TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE; | |
| } | |
| if ((OperationRequest > TCG2_PHYSICAL_PRESENCE_NO_ACTION_MAX) && | |
| (OperationRequest < TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) ) { | |
| // | |
| // This command requires UI to prompt user for Auth data. | |
| // | |
| return TCG_PP_SUBMIT_REQUEST_TO_PREOS_NOT_IMPLEMENTED; | |
| } | |
| if ((PpData.PPRequest != OperationRequest) || | |
| (PpData.PPRequestParameter != RequestParameter)) { | |
| PpData.PPRequest = (UINT8)OperationRequest; | |
| PpData.PPRequestParameter = RequestParameter; | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE); | |
| Status = gRT->SetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, | |
| DataSize, | |
| &PpData | |
| ); | |
| } | |
| if (EFI_ERROR (Status)) { | |
| DEBUG ((EFI_D_ERROR, "[TPM2] Set PP variable failure! Status = %r\n", Status)); | |
| return TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE; | |
| } | |
| if (OperationRequest >= TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) { | |
| DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS); | |
| Status = gRT->GetVariable ( | |
| TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, | |
| &gEfiTcg2PhysicalPresenceGuid, | |
| NULL, | |
| &DataSize, | |
| &Flags | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| Flags.PPFlags = TCG2_BIOS_TPM_MANAGEMENT_FLAG_DEFAULT; | |
| } | |
| return Tcg2PpVendorLibSubmitRequestToPreOSFunction (OperationRequest, Flags.PPFlags, RequestParameter); | |
| } | |
| return TCG_PP_SUBMIT_REQUEST_TO_PREOS_SUCCESS; | |
| } |