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- /** @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 - 2020, Intel Corporation. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #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 ((DEBUG_INFO, "Tpm2ClearControl ... \n"));
- Status = Tpm2ClearControl (TPM_RH_PLATFORM, AuthSession, NO);
- DEBUG ((DEBUG_INFO, "Tpm2ClearControl - %r\n", Status));
- if (EFI_ERROR (Status)) {
- goto Done;
- }
- DEBUG ((DEBUG_INFO, "Tpm2Clear ... \n"));
- Status = Tpm2Clear (TPM_RH_PLATFORM, AuthSession);
- DEBUG ((DEBUG_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 ((DEBUG_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_EVENT_ALGORITHM_BITMAP TpmHashAlgorithmBitmap;
- UINT32 ActivePcrBanks;
- 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 = Tpm2GetCapabilitySupportedAndActivePcrs (&TpmHashAlgorithmBitmap, &ActivePcrBanks);
- ASSERT_EFI_ERROR (Status);
- //
- // PP spec requirements:
- // Firmware should check that all requested (set) hashing algorithms are supported with respective PCR banks.
- // Firmware has to ensure that at least one PCR banks is active.
- // If not, an error is returned and no action is taken.
- //
- if ((CommandParameter == 0) || ((CommandParameter & (~TpmHashAlgorithmBitmap)) != 0)) {
- DEBUG ((DEBUG_ERROR, "PCR banks %x to allocate are not supported by TPM. Skip operation\n", CommandParameter));
- return TCG_PP_OPERATION_RESPONSE_BIOS_FAILURE;
- }
- Status = Tpm2PcrAllocateBanks (PlatformAuth, TpmHashAlgorithmBitmap, 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 = Tpm2GetCapabilitySupportedAndActivePcrs (&TpmHashAlgorithmBitmap, &ActivePcrBanks);
- ASSERT_EFI_ERROR (Status);
- Status = Tpm2PcrAllocateBanks (PlatformAuth, TpmHashAlgorithmBitmap, TpmHashAlgorithmBitmap);
- if (EFI_ERROR (Status)) {
- return TCG_PP_OPERATION_RESPONSE_BIOS_FAILURE;
- } else {
- return TCG_PP_OPERATION_RESPONSE_SUCCESS;
- }
- case TCG2_PHYSICAL_PRESENCE_ENABLE_BLOCK_SID:
- PpiFlags->PPFlags |= TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_ENABLE_BLOCK_SID;
- return TCG_PP_OPERATION_RESPONSE_SUCCESS;
- case TCG2_PHYSICAL_PRESENCE_DISABLE_BLOCK_SID:
- PpiFlags->PPFlags &= ~TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_ENABLE_BLOCK_SID;
- return TCG_PP_OPERATION_RESPONSE_SUCCESS;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_ENABLE_BLOCK_SID_FUNC_TRUE:
- PpiFlags->PPFlags |= TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_PP_REQUIRED_FOR_ENABLE_BLOCK_SID;
- return TCG_PP_OPERATION_RESPONSE_SUCCESS;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_ENABLE_BLOCK_SID_FUNC_FALSE:
- PpiFlags->PPFlags &= ~TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_PP_REQUIRED_FOR_ENABLE_BLOCK_SID;
- return TCG_PP_OPERATION_RESPONSE_SUCCESS;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_DISABLE_BLOCK_SID_FUNC_TRUE:
- PpiFlags->PPFlags |= TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_PP_REQUIRED_FOR_DISABLE_BLOCK_SID;
- return TCG_PP_OPERATION_RESPONSE_SUCCESS;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_DISABLE_BLOCK_SID_FUNC_FALSE:
- PpiFlags->PPFlags &= ~TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_PP_REQUIRED_FOR_DISABLE_BLOCK_SID;
- 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;
- TmpStr2 = NULL;
- CautionKey = FALSE;
- NoPpiInfo = FALSE;
- BufSize = CONFIRM_BUFFER_SIZE;
- ConfirmText = AllocateZeroPool (BufSize);
- ASSERT (ConfirmText != NULL);
- mTcg2PpStringPackHandle = HiiAddPackages (&gEfiTcg2PhysicalPresenceGuid, gImageHandle, DxeTcg2PhysicalPresenceLibStrings, NULL);
- ASSERT (mTcg2PpStringPackHandle != 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:
- 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);
- 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;
- case TCG2_PHYSICAL_PRESENCE_ENABLE_BLOCK_SID:
- TmpStr2 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_ENABLE_BLOCK_SID));
- TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_HEAD_STR));
- UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
- FreePool (TmpStr1);
- break;
- case TCG2_PHYSICAL_PRESENCE_DISABLE_BLOCK_SID:
- TmpStr2 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_DISABLE_BLOCK_SID));
- TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_HEAD_STR));
- UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
- FreePool (TmpStr1);
- break;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_ENABLE_BLOCK_SID_FUNC_FALSE:
- NoPpiInfo = TRUE;
- TmpStr2 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_PP_ENABLE_BLOCK_SID));
- TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_PPI_HEAD_STR));
- UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
- FreePool (TmpStr1);
- break;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_DISABLE_BLOCK_SID_FUNC_FALSE:
- NoPpiInfo = TRUE;
- TmpStr2 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_PP_DISABLE_BLOCK_SID));
- TmpStr1 = Tcg2PhysicalPresenceGetStringById (STRING_TOKEN (TCG_STORAGE_PPI_HEAD_STR));
- UnicodeSPrint (ConfirmText, BufSize, TmpStr1, TmpStr2);
- 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);
- HiiRemovePackages (mTcg2PpStringPackHandle);
- 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
- )
- {
- EFI_TCG2_PROTOCOL *Tcg2Protocol;
- EFI_STATUS Status;
- BOOLEAN IsRequestValid;
- *RequestConfirmed = FALSE;
- if (TcgPpData->PPRequest <= TCG2_PHYSICAL_PRESENCE_NO_ACTION_MAX) {
- //
- // Need TCG2 protocol.
- //
- Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **)&Tcg2Protocol);
- if (EFI_ERROR (Status)) {
- return 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;
- case TCG2_PHYSICAL_PRESENCE_ENABLE_BLOCK_SID:
- if ((Flags.PPFlags & TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_PP_REQUIRED_FOR_ENABLE_BLOCK_SID) == 0) {
- *RequestConfirmed = TRUE;
- }
- break;
- case TCG2_PHYSICAL_PRESENCE_DISABLE_BLOCK_SID:
- if ((Flags.PPFlags & TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_PP_REQUIRED_FOR_DISABLE_BLOCK_SID) == 0) {
- *RequestConfirmed = TRUE;
- }
- break;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_ENABLE_BLOCK_SID_FUNC_TRUE:
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_DISABLE_BLOCK_SID_FUNC_TRUE:
- *RequestConfirmed = TRUE;
- break;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_ENABLE_BLOCK_SID_FUNC_FALSE:
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_DISABLE_BLOCK_SID_FUNC_FALSE:
- 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, out] TcgPpData Pointer to the physical presence NV variable.
- @param[in, out] Flags Pointer to the physical presence interface flags.
- **/
- VOID
- Tcg2ExecutePendingTpmRequest (
- IN TPM2B_AUTH *PlatformAuth OPTIONAL,
- IN OUT EFI_TCG2_PHYSICAL_PRESENCE *TcgPpData,
- IN OUT 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) {
- *Flags = NewFlags;
- 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;
- case TCG2_PHYSICAL_PRESENCE_ENABLE_BLOCK_SID:
- case TCG2_PHYSICAL_PRESENCE_DISABLE_BLOCK_SID:
- break;
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_ENABLE_BLOCK_SID_FUNC_TRUE:
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_DISABLE_BLOCK_SID_FUNC_TRUE:
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_ENABLE_BLOCK_SID_FUNC_FALSE:
- case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_DISABLE_BLOCK_SID_FUNC_FALSE:
- return;
- 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;
- EDKII_VARIABLE_LOCK_PROTOCOL *VariableLockProtocol;
- EFI_TCG2_PHYSICAL_PRESENCE_FLAGS PpiFlags;
- //
- // 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 ((DEBUG_ERROR, "[TPM2] Error when lock variable %s, Status = %r\n", TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, Status));
- ASSERT_EFI_ERROR (Status);
- }
- }
- //
- // Check S4 resume
- //
- if (GetBootModeHob () == BOOT_ON_S4_RESUME) {
- DEBUG ((DEBUG_INFO, "S4 Resume, Skip TPM PP process!\n"));
- return;
- }
- //
- // 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 = PcdGet32 (PcdTcg2PhysicalPresenceFlags);
- 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 ((DEBUG_ERROR, "[TPM2] Set physical presence flag failed, Status = %r\n", Status));
- return;
- }
- DEBUG ((DEBUG_INFO, "[TPM2] Initial physical presence flags value is 0x%x\n", PpiFlags.PPFlags));
- }
- //
- // 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 ((DEBUG_ERROR, "[TPM2] Set physical presence variable failed, Status = %r\n", Status));
- return;
- }
- }
- DEBUG ((DEBUG_INFO, "[TPM2] Flags=%x, PPRequest=%x (LastPPRequest=%x)\n", PpiFlags.PPFlags, TcgPpData.PPRequest, TcgPpData.LastPPRequest));
- //
- // Execute pending TPM request.
- //
- Tcg2ExecutePendingTpmRequest (PlatformAuth, &TcgPpData, &PpiFlags);
- DEBUG ((DEBUG_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_PHYSICAL_PRESENCE_FLAGS PpiFlags;
- //
- // Check S4 resume
- //
- if (GetBootModeHob () == BOOT_ON_S4_RESUME) {
- DEBUG ((DEBUG_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 ((DEBUG_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 ((DEBUG_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 ((DEBUG_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 ((DEBUG_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_STORAGE_MANAGEMENT_BEGIN))
- {
- 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 ((DEBUG_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 = PcdGet32 (PcdTcg2PhysicalPresenceFlags);
- }
- return Tcg2PpVendorLibSubmitRequestToPreOSFunction (OperationRequest, Flags.PPFlags, RequestParameter);
- }
- return TCG_PP_SUBMIT_REQUEST_TO_PREOS_SUCCESS;
- }
- /**
- Return TPM2 ManagementFlags set by PP interface.
- @retval ManagementFlags TPM2 Management Flags.
- **/
- UINT32
- EFIAPI
- Tcg2PhysicalPresenceLibGetManagementFlags (
- VOID
- )
- {
- EFI_STATUS Status;
- EFI_TCG2_PHYSICAL_PRESENCE_FLAGS PpiFlags;
- UINTN DataSize;
- DEBUG ((DEBUG_INFO, "[TPM2] GetManagementFlags\n"));
- 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 = PcdGet32 (PcdTcg2PhysicalPresenceFlags);
- }
- return PpiFlags.PPFlags;
- }
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