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SecurityPkg Tcg2Pei: Add comments into LogHashEvent() 

Add comments into LogHashEvent() to describe the usage
of GetDigestListSize (DigestList).

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Star Zeng 2016-11-18 10:58:35 +08:00
parent a9f1b2e2d7
commit 3cabe66b20
1 changed files with 4 additions and 0 deletions
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4
SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c
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@ -317,6 +317,10 @@ LogHashEvent (
} }
break; break;
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2: case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2:
//
// Use GetDigestListSize (DigestList) in the GUID HOB DataLength calculation
// to reserve enough buffer to hold TPML_DIGEST_VALUES compact binary.
//
HobData = BuildGuidHob ( HobData = BuildGuidHob (
&gTcgEvent2EntryHobGuid, &gTcgEvent2EntryHobGuid,
sizeof(TcgPcrEvent2->PCRIndex) + sizeof(TcgPcrEvent2->EventType) + GetDigestListSize (DigestList) + sizeof(TcgPcrEvent2->EventSize) + NewEventHdr->EventSize sizeof(TcgPcrEvent2->PCRIndex) + sizeof(TcgPcrEvent2->EventType) + GetDigestListSize (DigestList) + sizeof(TcgPcrEvent2->EventSize) + NewEventHdr->EventSize