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

Ahmad Fatoum
2021-04-01T10:29:10Z

Hello,

On 01.04.21 12:20, Richard Weinberger wrote:
> Ahmad,
>
> ----- Ursprüngliche Mail -----
>> Von: "Ahmad Fatoum" <a.fatoum@pengutronix.de>
>>> I'm pretty sure with minimal changes it will work with your recent approach too.
>>
>> I am using dmsetup directly in my project. I am not familiar with cryptsetup
>> plain. What benefits do you see with this over direct dmsetup?
>
> cryptsetup is the de-facto standard to setup encrypted block devices.
> There is a lot of existing tooling around cryptsetup already (systemd, etc..),

Do you mean systemd-cryptsetup? It looks to me like it's just a way to supply
the keyphrase. With trusted keys and a keyphrase unknown to userspace, this
won't work.

> so being able to use CAAM keys for dm-crypt with cryptsetup seems natural to me.
> Plain mode allows setting up dm-crypt without LUKS.

I don't (yet) see the utility of it without LUKS. Perhaps a command dump on how
to do the same I did with dmsetup, but with cryptsetup plain instead could
help me to see the benefits?

Cheers,
Ahmad

>
> Thanks,
> //richard
>

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