Re: TPM2 for disk encryption, clevis

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On Wed, Jul 08, 2020 at 11:58:58AM +0300, Marius Vollmer wrote:
> Hi,
> 
> we have some rudimentary support for Clevis in the Cockpit Web Console,
> and now the question is, should we add support for "tpm2" to that?

What does 'support for clevis' there look like? you mean just binding a
encrypted drive to look for clevis servers on boot?
> 
> As I understand it, there is a lot of evolving OS specific subtlety
> involved, so I am asking specifically how this would look on current
> Fedora and what to expect in the near future.

> 
> Here is the discussion that prompted my question:
> 
>     https://github.com/cockpit-project/cockpit/issues/14313[1]
> 
> In most concrete terms: Which PCRs should we use on which version of
> Fedora?  ("None" is a totally nice answer.)
> 
> I don't think we can let the user enter the PCR numbers, that requires
> way to much intimate knowledge of the current state of support for
> secure boot of their OS.  I.e., the best way I have to answer that for
> myself is to ask here.
> 
> The user needs to be shielded from that knowledge, I'd say, and ideally
> clevis would already shield me from it, but I am happy to do it in
> Cockpit.

I think tpm2 might be good, but.... lots of machines don't have tpm2. 
So I would think it would need to be optional?

kevin

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