linux-kernel - Re: Read-protected UEFI variables

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Message-ID: <20180219202440.2e80dfbc@alans-desktop>
Date:   Mon, 19 Feb 2018 20:24:40 +0000
From:   Alan Cox <gnomes@...rguk.ukuu.org.uk>
To:     Benjamin Drung <benjamin.drung@...fitbricks.com>
Cc:     Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Matthew Garrett <matthew.garrett@...ula.com>,
        Jeremy Kerr <jk@...abs.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        linux-efi@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Read-protected UEFI variables

> If the UEFI is as secure as storing an unencrypted file on a hard
> drive, I am satisfied. Or do you have a better idea where to store the
> SSH keys for a diskless system that boots via network?

Store them in the TPM ?

If you are booting over a network and not doing some kind of TPM based
trusted boot check you already lost to a network attacker 

Alan