linux-kernel - Re: [PATCH 1/2] ima: use the IMA configured hash algo to calculate the boot aggregate

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Message-ID: <20200129083034.GA387@dell5510>
Date:   Wed, 29 Jan 2020 09:30:34 +0100
From:   Petr Vorel <pvorel@...e.cz>
To:     Mimi Zohar <zohar@...ux.ibm.com>
Cc:     Jerry Snitselaar <jsnitsel@...hat.com>,
        linux-integrity@...r.kernel.org,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ima: use the IMA configured hash algo to calculate
 the boot aggregate

Hi Mimi,

Reviewed-by: Petr Vorel <pvorel@...e.cz>

> The original LTP ima_boot_aggregate.c test needed to be updated to
> support TPM 2.0 before this change.  For TPM 2.0, the PCRs are not
> exported.  With this change, the kernel could be reading PCRs from a
> TPM bank other than SHA1 and calculating the boot_aggregate based on a
> different hash algorithm as well.  I'm not sure how a remote verifier
> would know which TPM bank was read, when calculating the boot-
> aggregate.
Mimi, do you plan to do update LTP test?

Kind regards,
Petr