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/** @file
This library is used by other modules to measure data to TPM.
Copyright (c) 2012, 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/TcgService.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/TpmMeasurementLib.h>
#include <Guid/Acpi.h>
#include <IndustryStandard/Acpi.h>
/**
Tpm12 measure and log data, and extend the measurement result into a specific PCR.
@param[in] PcrIndex PCR Index.
@param[in] EventType Event type.
@param[in] EventLog Measurement event log.
@param[in] LogLen Event log length in bytes.
@param[in] HashData The start of the data buffer to be hashed, extended.
@param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_UNSUPPORTED TPM device not available.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
Tpm12MeasureAndLogData (
IN UINT32 PcrIndex,
IN UINT32 EventType,
IN VOID *EventLog,
IN UINT32 LogLen,
IN VOID *HashData,
IN UINT64 HashDataLen
)
{
EFI_STATUS Status;
EFI_TCG_PROTOCOL *TcgProtocol;
TCG_PCR_EVENT *TcgEvent;
EFI_PHYSICAL_ADDRESS EventLogLastEntry;
UINT32 EventNumber;
TcgEvent = NULL;
//
// Tpm active/deactive state is checked in HashLogExtendEvent
//
Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **) &TcgProtocol);
if (EFI_ERROR(Status)){
return Status;
}
TcgEvent = (TCG_PCR_EVENT *)AllocateZeroPool (sizeof (TCG_PCR_EVENT_HDR) + LogLen);
if(TcgEvent == NULL) {
return EFI_OUT_OF_RESOURCES;
}
TcgEvent->PCRIndex = PcrIndex;
TcgEvent->EventType = EventType;
TcgEvent->EventSize = LogLen;
CopyMem (&TcgEvent->Event[0], EventLog, LogLen);
EventNumber = 1;
Status = TcgProtocol->HashLogExtendEvent (
TcgProtocol,
(EFI_PHYSICAL_ADDRESS)(UINTN)HashData,
HashDataLen,
TPM_ALG_SHA,
TcgEvent,
&EventNumber,
&EventLogLastEntry
);
FreePool (TcgEvent);
return Status;
}
/**
Tpm measure and log data, and extend the measurement result into a specific PCR.
@param[in] PcrIndex PCR Index.
@param[in] EventType Event type.
@param[in] EventLog Measurement event log.
@param[in] LogLen Event log length in bytes.
@param[in] HashData The start of the data buffer to be hashed, extended.
@param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_UNSUPPORTED TPM device not available.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
EFIAPI
TpmMeasureAndLogData (
IN UINT32 PcrIndex,
IN UINT32 EventType,
IN VOID *EventLog,
IN UINT32 LogLen,
IN VOID *HashData,
IN UINT64 HashDataLen
)
{
EFI_STATUS Status;
//
// Try to measure using Tpm1.2 protocol
//
Status = Tpm12MeasureAndLogData(
PcrIndex,
EventType,
EventLog,
LogLen,
HashData,
HashDataLen
);
return Status;
}
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