/** @file | |
Tcg PP storage library instance that does support any storage specific PPI. | |
Copyright (c) 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 <Guid/TcgPhysicalPresenceStorageData.h> | |
#include <IndustryStandard/TcgPhysicalPresence.h> | |
#include <Protocol/SmmVariable.h> | |
#include <Library/TcgPhysicalPresenceStorageLib.h> | |
#include <Library/DebugLib.h> | |
#include <Library/SmmServicesTableLib.h> | |
EFI_SMM_VARIABLE_PROTOCOL *mTcg2PpStorageSmmVariable; | |
/** | |
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 | |
TcgPhysicalPresenceStorageLibSubmitRequestToPreOSFunction ( | |
IN UINT32 OperationRequest, | |
IN UINT32 RequestParameter | |
) | |
{ | |
ASSERT (FALSE); | |
return TCG_PP_RETURN_TPM_OPERATION_RESPONSE_SUCCESS; | |
} | |
/** | |
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 | |
TcgPhysicalPresenceStorageLibReturnOperationResponseToOsFunction ( | |
OUT UINT32 *MostRecentRequest, | |
OUT UINT32 *Response | |
) | |
{ | |
ASSERT (FALSE); | |
return TCG_PP_RETURN_TPM_OPERATION_RESPONSE_SUCCESS; | |
} | |
/** | |
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 | |
TcgPhysicalPresenceStorageLibNeedUserConfirm( | |
VOID | |
) | |
{ | |
ASSERT (FALSE); | |
return 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 | |
TcgPhysicalPresenceStorageLibProcessRequest ( | |
VOID | |
) | |
{ | |
ASSERT (FALSE); | |
} | |
/** | |
The handler for TPM physical presence function: | |
Return TPM Operation flag variable. | |
@return Return Code for Return TPM Operation flag variable. | |
**/ | |
UINT32 | |
EFIAPI | |
TcgPhysicalPresenceStorageLibReturnStorageFlags ( | |
VOID | |
) | |
{ | |
UINTN DataSize; | |
EFI_TCG_PHYSICAL_PRESENCE_STORAGE_FLAGS PpiFlags; | |
EFI_STATUS Status; | |
// | |
// Get the Physical Presence storage flags | |
// | |
DataSize = sizeof (EFI_TCG_PHYSICAL_PRESENCE_STORAGE_FLAGS); | |
Status = mTcg2PpStorageSmmVariable->SmmGetVariable ( | |
TCG_PHYSICAL_PRESENCE_STORAGE_FLAGS_VARIABLE, | |
&gEfiTcgPhysicalPresenceStorageGuid, | |
NULL, | |
&DataSize, | |
&PpiFlags | |
); | |
if (EFI_ERROR (Status)) { | |
DEBUG ((EFI_D_ERROR, "[TPM2] Get PP storage flags failure! Status = %r\n", Status)); | |
PpiFlags.PPFlags = TCG_BIOS_STORAGE_MANAGEMENT_FLAG_DEFAULT; | |
} | |
return PpiFlags.PPFlags; | |
} | |
/** | |
Install Boot Manager Menu driver. | |
@param ImageHandle The image handle. | |
@param SystemTable The system table. | |
@retval EFI_SUCEESS Install Boot manager menu success. | |
@retval Other Return error status. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
TcgPhysicalPresenceStorageLibConstructor ( | |
IN EFI_HANDLE ImageHandle, | |
IN EFI_SYSTEM_TABLE *SystemTable | |
) | |
{ | |
EFI_STATUS Status; | |
// | |
// Locate SmmVariableProtocol. | |
// | |
Status = gSmst->SmmLocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID**)&mTcg2PpStorageSmmVariable); | |
ASSERT_EFI_ERROR (Status); | |
return EFI_SUCCESS; | |
} |