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Subject: Re: [PATCH v2 1/2] security/keys/secure_key: Adds the secure key
 support based on CAAM.
From:   Mimi Zohar <zohar@linux.ibm.com>
To:     David Howells <dhowells@redhat.com>
Cc:     James Bottomley <James.Bottomley@HansenPartnership.com>,
        Udit Agarwal <udit.agarwal@nxp.com>, zohar@linux.vnet.ibm.com,
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        linux-kernel@vger.kernel.org, sahil.malhotra@nxp.com,
        ruchika.gupta@nxp.com, horia.geanta@nxp.com, aymen.sghaier@nxp.com
Date:   Fri, 03 Aug 2018 11:23:35 -0400
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On Fri, 2018-08-03 at 15:55 +0100, David Howells wrote:
> Mimi Zohar <zohar@linux.ibm.com> wrote:
> 
> > "trusted" keys are currently being used to decrypt other keys (eg.
> > encrypted, ecryptfs, ...).
> 
> Can it decrypt both symmetric and asymmetric keys?

Yes, the "trusted" key is returned to the caller and is used to
decrypt a datablob.

For an example, refer to encrypted_key_decrypt().  The call
to request_master_key() returns either the "trusted" or "user" type
key, which is used to decrypt the "enccrypted" key type.

Mimi