Re: [PATCH v1 0/3] KEYS: trusted: Introduce support for NXP CAAM-based trusted keys

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, 1 Apr 2021 at 19:00, Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> wrote:
>
> Hello Richard, Sumit,
>
> On 01.04.21 15:17, Richard Weinberger wrote:
> > Sumit,
> >
> > ----- Ursprüngliche Mail -----
> >> Von: "Sumit Garg" <sumit.garg@xxxxxxxxxx>
> >> IIUC, this would require support for multiple trusted keys backends at
> >> runtime but currently the trusted keys subsystem only supports a
> >> single backend which is selected via kernel module parameter during
> >> boot.
> >>
> >> So the trusted keys framework needs to evolve to support multiple
> >> trust sources at runtime but I would like to understand the use-cases
> >> first. IMO, selecting the best trust source available on a platform
> >> for trusted keys should be a one time operation, so why do we need to
> >> have other backends available at runtime as well?
> >
> > I thought about devices with a TPM-Chip and CAAM.

In this case why would one prefer to use CAAM when you have standards
compliant TPM-Chip which additionally offers sealing to specific PCR
(integrity measurement) values.

> > IMHO allowing only one backend at the same time is a little over simplified.
>
> It is, but I'd rather leave this until it's actually needed.
> What can be done now is adopting a format for the exported keys that would
> make this extension seamless in future.
>

+1

-Sumit

> Cheers,
> Ahmad
>
> --
> Pengutronix e.K.                           |                             |
> Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Linux Kernel]     [Linux Kernel Hardening]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux SCSI]

  Powered by Linux