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SecurityPkg: Tcg2Dxe: Update PCR[4] measure logic 

Update PCR[4] measure logic for each boot attempt.
1. Measure event to PCR[4] instead of PCR[5]
2. Measure “Calling UEFI Application from Boot Option”
http://www.trustedcomputinggroup.org/wp-content/uploads/PC-ClientSpecific_Platform_Profile_for_TPM_2p0_Systems_v21.pdf

Cc: Star Zeng <star.zeng@intel.com>
Cc: Yao Jiewen <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Yao Jiewen <jiewen.yao@intel.com>
This commit is contained in:
Zhang, Chao B 2017-01-25 12:50:55 +08:00
parent 8b17ad862c
commit c1b0828b3b
1 changed files with 22 additions and 3 deletions
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23
SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c
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@ -1648,8 +1648,9 @@ SetupEventLog (
}
/**
Measure and log an action string, and extend the measurement result into PCR[5].
Measure and log an action string, and extend the measurement result into PCR[PCRIndex].
@param[in] PCRIndex PCRIndex to extend
@param[in] String A specific string that indicates an Action event.
@retval EFI_SUCCESS Operation completed successfully.
@ -1658,12 +1659,13 @@ SetupEventLog (
**/
EFI_STATUS
TcgMeasureAction (
IN TPM_PCRINDEX PCRIndex,
IN CHAR8 *String
)
{
TCG_PCR_EVENT_HDR TcgEvent;
TcgEvent.PCRIndex = 5;
TcgEvent.PCRIndex = PCRIndex;
TcgEvent.EventType = EV_EFI_ACTION;
TcgEvent.EventSize = (UINT32)AsciiStrLen (String);
return TcgDxeHashLogExtendEvent (
@ -2180,6 +2182,7 @@ OnReadyToBoot (
// 1. This is the first boot attempt.
//
Status = TcgMeasureAction (
4,
EFI_CALLING_EFI_APPLICATION
);
if (EFI_ERROR (Status)) {
@ -2213,11 +2216,24 @@ OnReadyToBoot (
// 6. Not first attempt, meaning a return from last attempt
//
Status = TcgMeasureAction (
4,
EFI_RETURNING_FROM_EFI_APPLICATOIN
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a not Measured. Error!\n", EFI_RETURNING_FROM_EFI_APPLICATOIN));
}
//
// 7. Next boot attempt, measure "Calling EFI Application from Boot Option" again
// TCG PC Client PFP spec Section 2.4.4.5 Step 4
//
Status = TcgMeasureAction (
4,
EFI_CALLING_EFI_APPLICATION
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a not Measured. Error!\n", EFI_CALLING_EFI_APPLICATION));
}
}
DEBUG ((EFI_D_INFO, "TPM2 Tcg2Dxe Measure Data when ReadyToBoot\n"));
@ -2250,6 +2266,7 @@ OnExitBootServices (
// Measure invocation of ExitBootServices,
//
Status = TcgMeasureAction (
5,
EFI_EXIT_BOOT_SERVICES_INVOCATION
);
if (EFI_ERROR (Status)) {
@ -2260,6 +2277,7 @@ OnExitBootServices (
// Measure success of ExitBootServices
//
Status = TcgMeasureAction (
5,
EFI_EXIT_BOOT_SERVICES_SUCCEEDED
);
if (EFI_ERROR (Status)) {
@ -2289,6 +2307,7 @@ OnExitBootServicesFailed (
// Measure Failure of ExitBootServices,
//
Status = TcgMeasureAction (
5,
EFI_EXIT_BOOT_SERVICES_FAILED
);
if (EFI_ERROR (Status)) {