REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2376
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Jian J Wang <jian.j.w...@intel.com>
Cc: Qi Zhang <qi1.zh...@intel.com>
Cc: Rahul Kumar <rahul1.ku...@intel.com>
Signed-off-by: Qi Zhang <qi1.zh...@intel.com>
---
SecurityPkg/Include/Ppi/Tcg.h | 5 +++++
SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c | 12 +++++++-----
2 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/SecurityPkg/Include/Ppi/Tcg.h b/SecurityPkg/Include/Ppi/Tcg.h
index 0e943f2465..22f47f9817 100644
--- a/SecurityPkg/Include/Ppi/Tcg.h
+++ b/SecurityPkg/Include/Ppi/Tcg.h
@@ -18,6 +18,11 @@ typedef struct _EDKII_TCG_PPI EDKII_TCG_PPI;
//
#define EDKII_TCG_PRE_HASH 0x0000000000000001
+//
+// This bit is shall be set when HashData is the pre-hash digest and log only.
+//
+#define EDKII_TCG_PRE_HASH_LOG_ONLY 0x0000000000000002
+
/**
Tpm measure and log data, and extend the measurement result into a specific
PCR.
diff --git a/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c
b/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c
index 246968bb7f..b56b03746c 100644
--- a/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c
+++ b/SecurityPkg/Tcg/Tcg2Pei/Tcg2Pei.c
@@ -453,13 +453,15 @@ HashLogExtendEvent (
return EFI_DEVICE_ERROR;
}
- if(Flags & EDKII_TCG_PRE_HASH) {
+ if ((Flags & EDKII_TCG_PRE_HASH) || (Flags & EDKII_TCG_PRE_HASH_LOG_ONLY)) {
ZeroMem (&DigestList, sizeof(DigestList));
CopyMem (&DigestList, HashData, sizeof(DigestList));
- Status = Tpm2PcrExtend (
- 0,
- &DigestList
- );
+ if (Flags & EDKII_TCG_PRE_HASH) {
+ Status = Tpm2PcrExtend (
+ NewEventHdr->PCRIndex,
+ &DigestList
+ );
+ }
} else {
Status = HashAndExtend (
NewEventHdr->PCRIndex,
--
2.26.2.windows.1
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