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/** @file
Extend to RTMR and Build GuidHob for tdx measurement.
Copyright (c) 2025, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/PrintLib.h>
#include <Library/TdxLib.h>
#include <Library/BaseCryptLib.h>
#include <Library/TpmMeasurementLib.h>
#include <IndustryStandard/UefiTcgPlatform.h>
#include <Library/TdxMeasurementLib.h>
/**
Do a hash operation on a data buffer, extend a specific RTMR with the hash result,
and add an entry to the Event Log.
@param[in] PcrIndex PCRIndex Index of the TPM PCR
@param[in] EventType Type of the Event.
@param[in] EventLog Physical address of the start of the data buffer.
@param[in] EventSize The length, in bytes, of the buffer referenced by EventLog.
@param[in] HashData Physical address of the start of the data buffer
to be hashed, extended, and logged.
@param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData
@retval EFI_SUCCESS The measurement is successful
@retval Others Other errors as indicated
**/
EFI_STATUS
EFIAPI
TdxHashLogExtendEvent (
IN UINT32 PcrIndex,
IN UINT32 EventType,
IN VOID *EventLog,
IN UINT32 LogLen,
IN VOID *HashData,
IN UINT64 HashDataLen
)
{
EFI_STATUS Status;
UINT8 Digest[SHA384_DIGEST_SIZE];
UINT32 MrIndex;
if ((EventLog == NULL) || (HashData == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (!TdIsEnabled ()) {
return EFI_UNSUPPORTED;
}
MrIndex = TdxMeasurementMapPcrToMrIndex (PcrIndex);
// MRTD is NOT extendable in TDVF.
if ((MrIndex == CC_MR_INDEX_INVALID) || (MrIndex == CC_MR_INDEX_0_MRTD)) {
return EFI_INVALID_PARAMETER;
}
Status = TdxMeasurementHashAndExtendToRtmr (
MrIndex - 1,
(UINT8 *)HashData,
(UINTN)HashDataLen,
Digest,
SHA384_DIGEST_SIZE
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a: TdxMeasurementHashAndExtendToRtmr failed with %r\n", __func__, Status));
return Status;
}
Status = TdxMeasurementBuildGuidHob (
MrIndex - 1,
EventType,
EventLog,
LogLen,
Digest,
SHA384_DIGEST_SIZE
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a: TdxMeasurementBuildGuidHob failed with %r\n", __func__, Status));
}
return Status;
}
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