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6f73428d06
Add below APIs implementation that copied from TdxHelperLib. - TdxMeasurementMapPcrToMrIndex - TdxMeasurementHashAndExtendToRtmr - TdxMeasurementBuildGuidHob Cc: Erdem Aktas <erdemaktas@google.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Min Xu <min.m.xu@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: Min Xu <min.m.xu@intel.com> Signed-off-by: Ceping Sun <cepingx.sun@intel.com>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/** @file
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TdxMeasurement Functions which are used in SEC and PEI phase
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Copyright (c) 2025, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiPei.h>
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#include <Pi/PiHob.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <IndustryStandard/Tpm20.h>
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#include <IndustryStandard/UefiTcgPlatform.h>
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#include <Library/TdxMeasurementLib.h>
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/**
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* Build GuidHob for Tdx measurement.
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*
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* Tdx measurement includes the measurement of TdHob and CFV. They're measured
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* and extended to RTMR registers in SEC phase. Because at that moment the Hob
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* service are not available. So the values of the measurement are saved in
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* workarea and will be built into GuidHob after the Hob service is ready.
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*
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* @param RtmrIndex RTMR index
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* @param EventType Event type
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* @param EventData Event data
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* @param EventSize Size of event data
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* @param HashValue Hash value
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* @param HashSize Size of hash
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*
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* @retval EFI_SUCCESS Successfully build the GuidHobs
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* @retval Others Other error as indicated
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*/
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EFI_STATUS
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EFIAPI
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TdxMeasurementBuildGuidHob (
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UINT32 RtmrIndex,
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UINT32 EventType,
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UINT8 *EventData,
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UINT32 EventSize,
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UINT8 *HashValue,
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UINT32 HashSize
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)
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{
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VOID *EventHobData;
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UINT8 *Ptr;
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TPML_DIGEST_VALUES *TdxDigest;
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if (HashSize != SHA384_DIGEST_SIZE) {
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return EFI_INVALID_PARAMETER;
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}
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#define TDX_DIGEST_VALUE_LEN (sizeof (UINT32) + sizeof (TPMI_ALG_HASH) + SHA384_DIGEST_SIZE)
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EventHobData = BuildGuidHob (
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&gCcEventEntryHobGuid,
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sizeof (TCG_PCRINDEX) + sizeof (TCG_EVENTTYPE) +
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TDX_DIGEST_VALUE_LEN +
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sizeof (UINT32) + EventSize
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);
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if (EventHobData == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Ptr = (UINT8 *)EventHobData;
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//
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// There are 2 types of measurement registers in TDX: MRTD and RTMR[0-3].
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// According to UEFI Spec 2.10 Section 38.4.1, RTMR[0-3] is mapped to MrIndex[1-4].
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// So RtmrIndex must be increased by 1 before the event log is created.
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//
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RtmrIndex++;
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CopyMem (Ptr, &RtmrIndex, sizeof (UINT32));
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Ptr += sizeof (UINT32);
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CopyMem (Ptr, &EventType, sizeof (TCG_EVENTTYPE));
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Ptr += sizeof (TCG_EVENTTYPE);
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TdxDigest = (TPML_DIGEST_VALUES *)Ptr;
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TdxDigest->count = 1;
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TdxDigest->digests[0].hashAlg = TPM_ALG_SHA384;
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CopyMem (
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TdxDigest->digests[0].digest.sha384,
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HashValue,
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SHA384_DIGEST_SIZE
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);
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Ptr += TDX_DIGEST_VALUE_LEN;
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CopyMem (Ptr, &EventSize, sizeof (UINT32));
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Ptr += sizeof (UINT32);
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CopyMem (Ptr, (VOID *)EventData, EventSize);
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Ptr += EventSize;
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return EFI_SUCCESS;
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}
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