linux-kernel - Re: [PATCH] KEYS: asym_tpm: Switch to get_random

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Message-ID: <20191008234935.GA13926@linux.intel.com>
Date:   Wed, 9 Oct 2019 02:49:35 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Ken Goldman <kgold@...ux.ibm.com>
Cc:     "Safford, David (GE Global Research, US)" <david.safford@...com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        "linux-integrity@...r.kernel.org" <linux-integrity@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "open list:ASYMMETRIC KEYS" <keyrings@...r.kernel.org>,
        "open list:CRYPTO API" <linux-crypto@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] KEYS: asym_tpm: Switch to get_random_bytes()

On Mon, Oct 07, 2019 at 06:13:01PM -0400, Ken Goldman wrote:
> The TPM library specification states that the TPM must comply with NIST
> SP800-90 A.
> 
> https://trustedcomputinggroup.org/membership/certification/tpm-certified-products/
> 
> shows that the TPMs get third party certification, Common Criteria EAL 4+.
> 
> While it's theoretically possible that an attacker could compromise
> both the TPM vendors and the evaluation agencies, we do have EAL 4+
> assurance against both 1 and 2.

Certifications do not equal to trust.

/Jarkko