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Subject: Re: [PATCH] KEYS: asym_tpm: Switch to get_random_bytes()
From:   Mimi Zohar <zohar@linux.ibm.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc:     James Bottomley <James.Bottomley@HansenPartnership.com>,
        Jerry Snitselaar <jsnitsel@redhat.com>,
        David Safford <david.safford@ge.com>,
        linux-integrity@vger.kernel.org, stable@vger.kernel.org,
        David Howells <dhowells@redhat.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        "David S. Miller" <davem@davemloft.net>,
        "open list:ASYMMETRIC KEYS" <keyrings@vger.kernel.org>,
        "open list:CRYPTO API" <linux-crypto@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>
Date:   Mon, 07 Oct 2019 14:08:15 -0400
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On Mon, 2019-10-07 at 02:52 +0300, Jarkko Sakkinen wrote:
> 
> With TEE coming in, TPM is not the only hardware measure anymore sealing
> the keys and we don't want a mess where every hardware asset does their
> own proprietary key generation. The proprietary technology should only
> take care of the sealing part.

I'm fine with the concept of "trusted" keys being extended beyond just
TPM.  But just as the VFS layer defines a set of callbacks and generic
functions, which can be used in lieu of file system specific callback
functions, a similar approach could be used here.

Mimi