netdev - Re: [RFC net-next 05/15] psp: add op for rotation of secret state

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Message-ID: <CADuNpCxb3NV84BLQd7064q5YEjnYutDqerY6dvTRDsqdK2fO3Q@mail.gmail.com>
Date: Thu, 16 May 2024 15:59:14 -0400
From: Lance Richardson <lance604@...il.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, pabeni@...hat.com, willemdebruijn.kernel@...il.com, 
	borisp@...dia.com, gal@...dia.com, cratiu@...dia.com, rrameshbabu@...dia.com, 
	steffen.klassert@...unet.com, tariqt@...dia.com, 
	Lance Richardson <rlance@...gle.com>
Subject: Re: [RFC net-next 05/15] psp: add op for rotation of secret state

On Thu, May 9, 2024 at 11:05 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> Rotating the secret state is a key part of the PSP protocol design.
> Some external daemon needs to do it once a day, or so.
> Add a netlink op to perform this operation.
> Add a notification group for informing users that key has been
> rotated and they should rekey (next rotation will cut them off).
>
Does this allow for the possibility of NIC firmware or the driver initiating
a rotation? E.g. during key generation if the SPI space has been
exhausted a rotation will be required in order to generate a new
derived key.