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SecurityPkg/Tcg2Config: Hide BIOS unsupported hash algorithm from UI 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4731

TCG2 configuration UI shows all the hash algorithms that TPM hardware
supports in the checkbox. If user only selects one algorithm that is
supported by TPM hardware but not supported by BIOS and uncheck the
others, the SyncPcrAllocationsAndPcrMask in Tcg2Pei will not be able
to decide a viable PCR to activate, then an assert occurs.

Add check against PcdTcg2HashAlgorithmBitmap when deciding whether
to suppress the hash algorithm checkbox to avoid user to select the
hash algorithm which may cause an assert.

Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Wei6 Xu <wei6.xu@intel.com>
Reviewed-by: Rahul Kumar <rahul1.kumar@intel.com>
Acked-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Wei6 Xu 2024-04-12 15:14:40 +08:00 committed by mergify[bot]
parent e25808f501
commit 0707d9296d
1 changed files with 41 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigImpl.c
View File

@ -722,33 +722,50 @@ FillBufferWithBootHashAlg (
}
/**
Set ConfigInfo according to TpmAlgHash.
Set ConfigInfo according to TpmAlgHash and Tcg2HashAlgBitmap.
@param[in,out] Tcg2ConfigInfo TCG2 config info.
@param[in] TpmAlgHash TpmAlgHash.
@param[in] Tcg2HashAlgBitmap TCG2 Hash Algorithm Bitmap.
**/
VOID
SetConfigInfo (
IN OUT TCG2_CONFIGURATION_INFO *Tcg2ConfigInfo,
IN UINT32 TpmAlgHash
IN UINT32 TpmAlgHash,
IN UINT32 Tcg2HashAlgBitmap
)
{
switch (TpmAlgHash) {
case TPM_ALG_SHA1:
Tcg2ConfigInfo->Sha1Supported = TRUE;
if ((Tcg2HashAlgBitmap & HASH_ALG_SHA1) != 0) {
Tcg2ConfigInfo->Sha1Supported = TRUE;
}
break;
case TPM_ALG_SHA256:
Tcg2ConfigInfo->Sha256Supported = TRUE;
if ((Tcg2HashAlgBitmap & HASH_ALG_SHA256) != 0) {
Tcg2ConfigInfo->Sha256Supported = TRUE;
}
break;
case TPM_ALG_SHA384:
Tcg2ConfigInfo->Sha384Supported = TRUE;
if ((Tcg2HashAlgBitmap & HASH_ALG_SHA384) != 0) {
Tcg2ConfigInfo->Sha384Supported = TRUE;
}
break;
case TPM_ALG_SHA512:
Tcg2ConfigInfo->Sha512Supported = TRUE;
if ((Tcg2HashAlgBitmap & HASH_ALG_SHA512) != 0) {
Tcg2ConfigInfo->Sha512Supported = TRUE;
}
break;
case TPM_ALG_SM3_256:
Tcg2ConfigInfo->Sm3Supported = TRUE;
if ((Tcg2HashAlgBitmap & HASH_ALG_SM3_256) != 0) {
Tcg2ConfigInfo->Sm3Supported = TRUE;
}
break;
}
}
@ -809,16 +826,17 @@ InstallTcg2ConfigForm (
IN OUT TCG2_CONFIG_PRIVATE_DATA *PrivateData
)
{
EFI_STATUS Status;
EFI_HII_HANDLE HiiHandle;
EFI_HANDLE DriverHandle;
EFI_HII_CONFIG_ACCESS_PROTOCOL *ConfigAccess;
UINTN Index;
TPML_PCR_SELECTION Pcrs;
CHAR16 TempBuffer[1024];
TCG2_CONFIGURATION_INFO Tcg2ConfigInfo;
TPM2_PTP_INTERFACE_TYPE TpmDeviceInterfaceDetected;
BOOLEAN IsCmdImp = FALSE;
EFI_STATUS Status;
EFI_HII_HANDLE HiiHandle;
EFI_HANDLE DriverHandle;
EFI_HII_CONFIG_ACCESS_PROTOCOL *ConfigAccess;
UINTN Index;
TPML_PCR_SELECTION Pcrs;
CHAR16 TempBuffer[1024];
TCG2_CONFIGURATION_INFO Tcg2ConfigInfo;
TPM2_PTP_INTERFACE_TYPE TpmDeviceInterfaceDetected;
BOOLEAN IsCmdImp;
EFI_TCG2_EVENT_ALGORITHM_BITMAP Tcg2HashAlgorithmBitmap;
DriverHandle = NULL;
ConfigAccess = &PrivateData->ConfigAccess;
@ -879,6 +897,8 @@ InstallTcg2ConfigForm (
break;
}
Tcg2HashAlgorithmBitmap = PcdGet32 (PcdTcg2HashAlgorithmBitmap);
ZeroMem (&Tcg2ConfigInfo, sizeof (Tcg2ConfigInfo));
Status = Tpm2GetCapabilityPcrs (&Pcrs);
if (EFI_ERROR (Status)) {
@ -897,20 +917,21 @@ InstallTcg2ConfigForm (
TempBuffer[0] = 0;
for (Index = 0; Index < Pcrs.count; Index++) {
AppendBufferWithTpmAlgHash (TempBuffer, sizeof (TempBuffer), Pcrs.pcrSelections[Index].hash);
SetConfigInfo (&Tcg2ConfigInfo, Pcrs.pcrSelections[Index].hash);
SetConfigInfo (&Tcg2ConfigInfo, Pcrs.pcrSelections[Index].hash, Tcg2HashAlgorithmBitmap);
}
HiiSetString (PrivateData->HiiHandle, STRING_TOKEN (STR_TPM2_SUPPORTED_HASH_ALGO_CONTENT), TempBuffer, NULL);
}
Status = Tpm2GetCapabilityIsCommandImplemented (TPM_CC_ChangeEPS, &IsCmdImp);
IsCmdImp = FALSE;
Status = Tpm2GetCapabilityIsCommandImplemented (TPM_CC_ChangeEPS, &IsCmdImp);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Tpm2GetCapabilityIsCmdImpl fails %r\n", Status));
}
Tcg2ConfigInfo.ChangeEPSSupported = IsCmdImp;
FillBufferWithBootHashAlg (TempBuffer, sizeof (TempBuffer), PcdGet32 (PcdTcg2HashAlgorithmBitmap));
FillBufferWithBootHashAlg (TempBuffer, sizeof (TempBuffer), Tcg2HashAlgorithmBitmap);
HiiSetString (PrivateData->HiiHandle, STRING_TOKEN (STR_BIOS_HASH_ALGO_CONTENT), TempBuffer, NULL);
//