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/** @file
This library is used by other modules to measure data to TPM.
Copyright (c) 2020, Intel Corporation. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Library/BaseMemoryLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/TpmMeasurementLib.h>
#include <Ppi/Tcg.h>
#include <IndustryStandard/UefiTcgPlatform.h>
/**
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;
EDKII_TCG_PPI *TcgPpi;
TCG_PCR_EVENT_HDR TcgEventHdr;
Status = PeiServicesLocatePpi (
&gEdkiiTcgPpiGuid,
0,
NULL,
(VOID**)&TcgPpi
);
if (EFI_ERROR(Status)) {
return Status;
}
TcgEventHdr.PCRIndex = PcrIndex;
TcgEventHdr.EventType = EventType;
TcgEventHdr.EventSize = LogLen;
Status = TcgPpi->HashLogExtendEvent (
TcgPpi,
0,
HashData,
(UINTN)HashDataLen,
&TcgEventHdr,
EventLog
);
return Status;
}
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