BitLocker Tpm And Recovery Password tests for AOAC devices with PCR 7

  • Article

All platforms that implement a TPM must ensure invariance of PCRs 7, 11 across power cycles in the absence of changes to the platform’s static core root of trust for measurements (SRTM). Attaching a (non-bootable) USB to the platform or attaching the platform to a docking station should not cause changes to the SRTM.

Note  

This test restarts the system multiple times to check whether PCRs are consistent.

 

Test details

Associated requirements

Device.DevFund.Firmware.UpdateDriverPackage System.Fundamentals.TPM.CS.ConnectedStandby

See the system hardware requirements.

Platforms

Windows RT (ARM-based) Windows 8 (x64) Windows 8 (x86) Windows RT 8.1 Windows 8.1 x64 Windows 8.1 x86

Expected run time

~15 minutes

Categories

Basic Certification

Type

Automated

 

Running the test

Before you run the test, complete the test setup as described in the test requirements: WDTF System Fundamentals Testing Prerequisites. Also, check that TPM is on and ready for use by running tpm.msc (the Trusted Platform Module (TPM) Management snap-in). Secure boot should be enabled.

Troubleshooting

For troubleshooting information, see Troubleshooting System Fundamentals Testing.

If this test fails, review the test log from Windows Hardware Certification Kit (Windows HCK) Studio.

  1. Make sure you can see fveapi.dll in %systemroot%\system32\.

  2. Check test output directly from command prompt when the test runs or open te.wtl in the HCK Manager.

  3. If a test script fails, check the BitLocker status:

    • Manage-bde –status [volume]

  4. Collect BitLocker event logs from event viewer at two locations:

    • Filter \Windows logs\System logs by event sources started with BitLocker

    • Applications and Services Logs\Microsoft\Windows\BitLocker-API\Management

  5. Run **tpm.msc ** to ensure that the TPM Status is ON and that ownership has been taken.

  6. Check TCG logs

    • Collect TCG log (*.txt).

    • Compare multiple copies of the TCG log and see whether PCR [0, 2, 4, 11] are consistent across reboot and hibernate.

Note  

If the BitLocker WHCK test results in a recovery event, the BitLocker recovery key is 48-zeros (0000-0000-0000-0000-0000-0000-0000-0000-0000-0000-0000-0000).

 

 

 

Send comments about this topic to Microsoft