Hello,

Following up with the Proposal for Measured Boot Implementation described in https://lists.trustedfirmware.org/pipermail/tf-a/2020-March/000332.html , I am working on the implementation of a test fTPM service to exercise Measured Boot on TF-A.

Some details about the implementation can be found below:

1.- The service will be based on Microsoft's reference implementation of the TPM 2.0 Specification by TCG. It will be implemented as an OP- TEE TA.

2.- During service initialisation, the fTPM service will read the TPM Event Log stored by Measured Boot in Secure Memory and it will extend it into the PCR specified by the log header.

3.- Alongside with the fTPM service, a test framework based on OP-TEE Toolkit is being implemented as well. This test framework will generate and run a Linux/Buildroot environment over a Foundation Model so the fTPM's PCRs can be accessed to verify its content.

It is important here to highlight that this fTPM service and the related test framework are meant to be used only for demonstration purposes, it is not meant to be used as a production implementation.

Please, let me know any comment or query you might have with regards this.

Best regards, Javier