linux-kernel - Re: [PATCH 0/4] keys: Introduce a keys frontend for attestation reports

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Date:   Tue, 8 Aug 2023 13:04:53 -0700
From:   Dionna Amalie Glaze <dionnaglaze@...gle.com>
To:     James Bottomley <James.Bottomley@...senpartnership.com>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>, dhowells@...hat.com,
        Brijesh Singh <brijesh.singh@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Borislav Petkov <bp@...en8.de>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Samuel Ortiz <sameo@...osinc.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-coco@...ts.linux.dev, keyrings@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] keys: Introduce a keys frontend for attestation reports

> Trusting the vTPM is a one time thing.  Once trust in the TPM is
> established, you don't need to be worried about replay and you can just
> use standard TPM primitives for everything onward, even when doing
> point in time runtime attestation.
>

It's a one time thing for who? It seems like you're still only looking
at the 1. use case and not the 2. use case. Every different person
establishing a connection with the service will need to independently
establish trust in the TPM.


-- 
-Dionna Glaze, PhD (she/her)