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|
//*************************************************************************
//*************************************************************************
//** **
//** (C)Copyright 1985-2011, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//*************************************************************************
//*************************************************************************
//**********************************************************************
// $Header: /Alaska/SOURCE/Modules/TCG2/Common/TcgPlatformSetupPolicy/TcgPlatformSetupPolicy.c 2 6/09/14 4:59p Fredericko $
//
// $Revision: 2 $
//
// $Date: 6/09/14 4:59p $
//**********************************************************************
// Revision History
// ----------------
// $Log: /Alaska/SOURCE/Modules/TCG2/Common/TcgPlatformSetupPolicy/TcgPlatformSetupPolicy.c $
//
// 2 6/09/14 4:59p Fredericko
// Changes for SetVariable vulnerability during Runtime
//
// 1 4/21/14 2:18p Fredericko
//
// 1 10/08/13 12:05p Fredericko
// Initial Check-In for Tpm-Next module
//
// 2 10/03/13 2:43p Fredericko
//
// 1 7/10/13 5:57p Fredericko
// [TAG] EIP120969
// [Category] New Feature
// [Description] TCG (TPM20)
//
// 7 5/19/12 6:42p Fredericko
//
// 6 12/15/11 3:30p Fredericko
// removed check for setup changes before NVRAM writes
//
// 5 10/26/11 2:14p Fredericko
// [TAG] EIP72872
// [Category] Improvement
// [Description] Do not call setvariable if no change to TPM setup
// information
// [Files] TcgPlatformSetupPolicy.c
//
// 4 10/24/11 1:52p Fredericko
// [TAG] EIP72872
// [Category] Improvement
// [Description] TCG module do not call SetVariable() for setup data if
// no setup changes
// [Files] TcgPlatformSetupPolicy.c
//
// 3 10/07/11 6:52p Fredericko
//
// 2 9/28/11 6:30p Fredericko
//
// 1 9/27/11 10:11p Fredericko
// [TAG] EIP67286
// [Category] Improvement
// [Description] Initial check-in for Tcg Setup policy for Dxe
// [Files] TcgPlatformSetupPolicy.cif
// TcgPlatformSetupPolicy.c
// TcgPlatformSetupPolicy.h
// TcgPlatformSetupPolicy.sdl
// TcgPlatformSetupPolicy.mak
// TcgPlatformSetupPolicy.dxs
//
//**********************************************************************
//<AMI_FHDR_START>
//---------------------------------------------------------------------------
// Name: TcgPlatformSetupPolicy.c
//
// Description: Policy file to allow reading and update of TCG policy
//
//---------------------------------------------------------------------------
//<AMI_FHDR_END>
#include <AmiDxeLib.h>
#include "TcgPlatformSetupPolicy.h"
TCG_PLATFORM_SETUP_PROTOCOL *TcgPlatformSetupInstance = NULL;
EFI_HANDLE gImageHandle;
static TCG_CONFIGURATION InitialConfigFlags;
EFI_GUID gTcgPlatformSetupPolicyGuid = TCG_PLATFORM_SETUP_POLICY_GUID;
EFI_GUID gTcgInternalSyncflagGuid = TCG_PPI_SYNC_FLAG_GUID;
EFI_GUID gTcgInternalflagsGuid = TCG_INTERNAL_FLAGS_GUID;
EFI_STATUS
UpdateTcgStatusFlags (TCG_CONFIGURATION *StatusFlags, BOOLEAN UpdateNvram)
{
EFI_STATUS Status;
UINTN VariableSize = sizeof(SETUP_DATA);
SETUP_DATA SetupDataBuffer;
UINTN SetupVariableSize = sizeof(SETUP_DATA);
UINT32 SetupVariableAttributes;
EFI_GUID gSetupGuid = SETUP_GUID;
TCG_PLATFORM_SETUP_PROTOCOL *NewTcgPlatformSetupInstance = NULL;
TCG_PLATFORM_SETUP_PROTOCOL *OldTcgPlatformSetupInstance = NULL;
if(InitialConfigFlags.DisallowTpm == 1)return EFI_INVALID_PARAMETER;
Status = pBS->LocateProtocol (&gTcgPlatformSetupPolicyGuid, NULL, &OldTcgPlatformSetupInstance);
if (EFI_ERROR (Status)) {
return Status;
}
Status = pBS->AllocatePool (
EfiBootServicesData,
sizeof (TCG_PLATFORM_SETUP_PROTOCOL),
(VOID**)&NewTcgPlatformSetupInstance
);
if(StatusFlags == NULL)
{
return EFI_INVALID_PARAMETER;
}
if(TcgPlatformSetupInstance == NULL) return EFI_OUT_OF_RESOURCES;
NewTcgPlatformSetupInstance->ConfigFlags.TpmSupport = InitialConfigFlags.TpmSupport;
NewTcgPlatformSetupInstance->ConfigFlags.TcmSupport = StatusFlags->TcmSupport;
NewTcgPlatformSetupInstance->ConfigFlags.TpmEnable = StatusFlags->TpmEnable ;
NewTcgPlatformSetupInstance->ConfigFlags.TpmAuthenticate = InitialConfigFlags.TpmAuthenticate;
NewTcgPlatformSetupInstance->ConfigFlags.TpmOperation = StatusFlags->TpmOperation;
NewTcgPlatformSetupInstance->ConfigFlags.DisallowTpm = 0;
NewTcgPlatformSetupInstance->ConfigFlags.Reserved1 = StatusFlags->Reserved1;
NewTcgPlatformSetupInstance->ConfigFlags.Reserved2 = StatusFlags->Reserved2;
NewTcgPlatformSetupInstance->ConfigFlags.TpmHardware = StatusFlags->TpmHardware;
NewTcgPlatformSetupInstance->ConfigFlags.TpmEnaDisable = StatusFlags->TpmEnaDisable;
NewTcgPlatformSetupInstance->ConfigFlags.TpmActDeact = StatusFlags->TpmActDeact;
NewTcgPlatformSetupInstance->ConfigFlags.TpmOwnedUnowned = StatusFlags->TpmOwnedUnowned;
NewTcgPlatformSetupInstance->ConfigFlags.TcgSupportEnabled = StatusFlags->TcgSupportEnabled ;
NewTcgPlatformSetupInstance->ConfigFlags.TpmError = StatusFlags->TpmError;
NewTcgPlatformSetupInstance->ConfigFlags.PpiSetupSyncFlag = StatusFlags->PpiSetupSyncFlag;
NewTcgPlatformSetupInstance->ConfigFlags.Reserved3 = StatusFlags->Reserved3;
NewTcgPlatformSetupInstance->ConfigFlags.Reserved4 = StatusFlags->Reserved4;
NewTcgPlatformSetupInstance->ConfigFlags.Reserved5 = StatusFlags->Reserved5;
NewTcgPlatformSetupInstance->ConfigFlags.Tpm20Device = StatusFlags->Tpm20Device;
NewTcgPlatformSetupInstance->UpdateStatusFlags = UpdateTcgStatusFlags;
Status = pBS->UninstallMultipleProtocolInterfaces(
gImageHandle,
&gTcgPlatformSetupPolicyGuid,
OldTcgPlatformSetupInstance,
NULL
);
Status = pBS->InstallMultipleProtocolInterfaces (
&gImageHandle,
&gTcgPlatformSetupPolicyGuid,
NewTcgPlatformSetupInstance,
NULL
);
if (EFI_ERROR (Status)) {
return Status;
}
if(UpdateNvram){
Status = pRS->GetVariable (
L"Setup",
&gSetupGuid,
&SetupVariableAttributes,
&SetupVariableSize,
&SetupDataBuffer);
SetupDataBuffer.TpmEnable = NewTcgPlatformSetupInstance->ConfigFlags.TpmEnable;
SetupDataBuffer.TpmSupport = NewTcgPlatformSetupInstance->ConfigFlags.TpmSupport;
SetupDataBuffer.TcmSupport = NewTcgPlatformSetupInstance->ConfigFlags.TcmSupport;
SetupDataBuffer.TpmAuthenticate = NewTcgPlatformSetupInstance->ConfigFlags.TpmAuthenticate;
SetupDataBuffer.TpmOperation = NewTcgPlatformSetupInstance->ConfigFlags.TpmOperation;
SetupDataBuffer.TpmEnaDisable = NewTcgPlatformSetupInstance->ConfigFlags.TpmEnaDisable;
SetupDataBuffer.TpmActDeact = NewTcgPlatformSetupInstance->ConfigFlags.TpmActDeact;
SetupDataBuffer.TpmHrdW = NewTcgPlatformSetupInstance->ConfigFlags.TpmHardware;
SetupDataBuffer.TpmOwnedUnowned = NewTcgPlatformSetupInstance->ConfigFlags.TpmOwnedUnowned;
SetupDataBuffer.TpmError = NewTcgPlatformSetupInstance->ConfigFlags.TpmError;
SetupDataBuffer.TcgSupportEnabled = NewTcgPlatformSetupInstance->ConfigFlags.TcgSupportEnabled;
SetupDataBuffer.Tpm20Device = NewTcgPlatformSetupInstance->ConfigFlags.Tpm20Device;
SetupDataBuffer.ShaPolicy = NewTcgPlatformSetupInstance->ConfigFlags.Reserved1;
Status = pRS->SetVariable (
L"Setup",
&gSetupGuid,
SetupVariableAttributes,
SetupVariableSize,
&SetupDataBuffer);
SetupVariableAttributes = EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_NON_VOLATILE;
Status = pRS->SetVariable (
L"TcgInternalSyncFlag",
&gTcgInternalSyncflagGuid,
SetupVariableAttributes,
sizeof(UINT8),
&(NewTcgPlatformSetupInstance->ConfigFlags.PpiSetupSyncFlag));
if(Status == EFI_INVALID_PARAMETER)
{
Status = pRS->SetVariable( L"TcgInternalSyncFlag", \
&gTcgInternalSyncflagGuid, \
0, \
0, \
NULL);
if(EFI_ERROR(Status))return Status;
Status = pRS->SetVariable( L"TcgInternalSyncFlag", \
&gTcgInternalSyncflagGuid, \
SetupVariableAttributes, \
sizeof(UINT8), \
&(NewTcgPlatformSetupInstance->ConfigFlags.PpiSetupSyncFlag));
}
}
return Status;
}
//**********************************************************************
//<AMI_PHDR_START>
//
// Procedure: TcgPlatformSetupPolicyEntryPoint
//
// Description: Entry point for TcgPlatformSetupPolicyEntryPoint
//
// Input: ImageHandle Image handle of this driver.
// SystemTable Global system service table.
//
// Output: EFI_STATUS
//
// Modified:
//
// Referrals:
//
// Notes:
//<AMI_PHDR_END>
//**********************************************************************
EFI_STATUS
EFIAPI
TcgPlatformSetupPolicyEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
UINTN VariableSize = 0;
SETUP_DATA SetupDataBuffer;
SETUP_DATA *SetupData = &SetupDataBuffer;
UINTN SetupVariableSize;
UINT32 SetupVariableAttributes;
EFI_GUID gSetupGuid = SETUP_GUID;
UINT8 SyncVar;
UINT8 DisallowTpmFlag;
UINTN TempSizeofSyncVar = sizeof(UINT8);
InitAmiLib (ImageHandle, SystemTable);
SetupVariableSize = sizeof (SETUP_DATA);
Status = pBS->AllocatePool (
EfiBootServicesData,
sizeof (TCG_PLATFORM_SETUP_PROTOCOL),
(VOID**)&TcgPlatformSetupInstance
);
if (EFI_ERROR(Status)) {
return EFI_OUT_OF_RESOURCES;
}
Status = pRS->GetVariable (
L"InternalDisallowTpmFlag",
&gTcgInternalflagsGuid,
&SetupVariableAttributes,
&TempSizeofSyncVar,
&DisallowTpmFlag);
if(EFI_ERROR(Status)){
DisallowTpmFlag = 0;
Status = EFI_SUCCESS;
}
else if(DisallowTpmFlag == 1)
{
MemSet(&TcgPlatformSetupInstance->ConfigFlags, sizeof(TCG_CONFIGURATION), 0);
TcgPlatformSetupInstance->ConfigFlags.DisallowTpm = 1;
MemSet(&InitialConfigFlags, sizeof(TCG_CONFIGURATION), 0);
InitialConfigFlags.DisallowTpm = 1;
TcgPlatformSetupInstance->Revision = TCG_PLATFORM_SETUP_PROTOCOL_REVISION_1;
TcgPlatformSetupInstance->UpdateStatusFlags = UpdateTcgStatusFlags;
Status = pRS->GetVariable (
L"Setup",
&gSetupGuid,
&SetupVariableAttributes,
&SetupVariableSize,
&SetupDataBuffer);
SetupDataBuffer.TpmEnable = 0;
SetupDataBuffer.TpmSupport = 0;
SetupDataBuffer.TcmSupport = 0;
SetupDataBuffer.TpmAuthenticate = 0;
SetupDataBuffer.TpmOperation = 0;
SetupDataBuffer.TpmEnaDisable = 0;
SetupDataBuffer.TpmActDeact = 0;
SetupDataBuffer.TpmHrdW = 0;
SetupDataBuffer.TpmOwnedUnowned = 0;
SetupDataBuffer.TpmError = 0;
SetupDataBuffer.SuppressTcg = DisallowTpmFlag;
SetupDataBuffer.TcgSupportEnabled = 0;
Status = pRS->SetVariable (
L"Setup",
&gSetupGuid,
SetupVariableAttributes,
SetupVariableSize,
&SetupDataBuffer);
return Status;
}
Status = pRS->GetVariable (
L"TcgInternalSyncFlag",
&gTcgInternalSyncflagGuid,
&SetupVariableAttributes,
&TempSizeofSyncVar,
&SyncVar);
if(EFI_ERROR(Status)){
SyncVar = 0;
}
Status = pRS->GetVariable (
L"Setup",
&gSetupGuid,
&SetupVariableAttributes,
&SetupVariableSize,
&SetupDataBuffer);
TcgPlatformSetupInstance->Revision = TCG_PLATFORM_SETUP_PROTOCOL_REVISION_1;
if (EFI_ERROR(Status))
{
MemSet(&TcgPlatformSetupInstance->ConfigFlags, sizeof(TCG_CONFIGURATION), 0);
SetupData = NULL;
} else {
MemSet(&TcgPlatformSetupInstance->ConfigFlags, sizeof(TCG_CONFIGURATION), 0);
TcgPlatformSetupInstance->ConfigFlags.TpmSupport = (SetupData->TpmSupport);
TcgPlatformSetupInstance->ConfigFlags.TcmSupport = (SetupData->TcmSupport);
TcgPlatformSetupInstance->ConfigFlags.TpmEnable = (SetupData->TpmEnable);
TcgPlatformSetupInstance->ConfigFlags.TpmAuthenticate = (SetupData->TpmAuthenticate);
TcgPlatformSetupInstance->ConfigFlags.TpmOperation = (SetupData->TpmOperation);
TcgPlatformSetupInstance->ConfigFlags.PpiSetupSyncFlag = SyncVar;
TcgPlatformSetupInstance->ConfigFlags.Reserved1 = (SetupData->ShaPolicy);
TcgPlatformSetupInstance->ConfigFlags.Reserved2 = 0;
TcgPlatformSetupInstance->ConfigFlags.DisallowTpm = DisallowTpmFlag;
TcgPlatformSetupInstance->ConfigFlags.TpmHardware = (SetupData->TpmHrdW);
TcgPlatformSetupInstance->ConfigFlags.TpmEnaDisable = (SetupData->TpmEnaDisable);
TcgPlatformSetupInstance->ConfigFlags.TpmActDeact = (SetupData->TpmActDeact);
TcgPlatformSetupInstance->ConfigFlags.TpmOwnedUnowned = (SetupData->TpmOwnedUnowned);
TcgPlatformSetupInstance->ConfigFlags.TcgSupportEnabled = (SetupData->TcgSupportEnabled);
TcgPlatformSetupInstance->ConfigFlags.TpmError = (SetupData->TpmError);
TcgPlatformSetupInstance->ConfigFlags.Reserved3 = 0;
TcgPlatformSetupInstance->ConfigFlags.Reserved4 = 0;
TcgPlatformSetupInstance->ConfigFlags.Reserved5 = 0;
TcgPlatformSetupInstance->ConfigFlags.Tpm20Device = SetupData->Tpm20Device;
}
TcgPlatformSetupInstance->UpdateStatusFlags = UpdateTcgStatusFlags;
InitialConfigFlags.TpmSupport = TcgPlatformSetupInstance->ConfigFlags.TpmSupport;
InitialConfigFlags.TcmSupport = TcgPlatformSetupInstance->ConfigFlags.TcmSupport;
InitialConfigFlags.TpmEnable = TcgPlatformSetupInstance->ConfigFlags.TpmEnable;
InitialConfigFlags.TpmAuthenticate = TcgPlatformSetupInstance->ConfigFlags.TpmAuthenticate;
InitialConfigFlags.TpmOperation = TcgPlatformSetupInstance->ConfigFlags.TpmOperation;
InitialConfigFlags.Reserved1 = TcgPlatformSetupInstance->ConfigFlags.Reserved1 ;
InitialConfigFlags.Reserved2 = TcgPlatformSetupInstance->ConfigFlags.Reserved2;
InitialConfigFlags.TpmHardware = TcgPlatformSetupInstance->ConfigFlags.TpmHardware;
InitialConfigFlags.TpmEnaDisable = TcgPlatformSetupInstance->ConfigFlags.TpmEnaDisable;
InitialConfigFlags.TpmActDeact = TcgPlatformSetupInstance->ConfigFlags.TpmActDeact;
InitialConfigFlags.TpmOwnedUnowned = TcgPlatformSetupInstance->ConfigFlags.TpmOwnedUnowned;
InitialConfigFlags.TcgSupportEnabled = TcgPlatformSetupInstance->ConfigFlags.TcgSupportEnabled;
InitialConfigFlags.TpmError = TcgPlatformSetupInstance->ConfigFlags.TpmError;
InitialConfigFlags.PpiSetupSyncFlag = TcgPlatformSetupInstance->ConfigFlags.PpiSetupSyncFlag;
InitialConfigFlags.Reserved3 = TcgPlatformSetupInstance->ConfigFlags.Reserved3;
InitialConfigFlags.Reserved4 = TcgPlatformSetupInstance->ConfigFlags.Reserved4;
InitialConfigFlags.Reserved5 = TcgPlatformSetupInstance->ConfigFlags.Reserved5;
InitialConfigFlags.Tpm20Device = TcgPlatformSetupInstance->ConfigFlags.Tpm20Device;
//
//
Status = pBS->InstallMultipleProtocolInterfaces (
&ImageHandle,
&gTcgPlatformSetupPolicyGuid,
TcgPlatformSetupInstance,
NULL
);
gImageHandle = ImageHandle;
return Status;
}
//*************************************************************************
//*************************************************************************
//** **
//** (C)Copyright 1985-2010, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//*************************************************************************
//*************************************************************************
|
