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From: Jarkko Sakkinen <jarkko@kernel.org>
To: Mimi Zohar <zohar@linux.ibm.com>, sumit.garg@linaro.org
Cc: Elaine Palmer <erpalmerny@gmail.com>,
	jarkko.sakkinen@linux.intel.com, jejb@linux.ibm.com,
	dhowells@redhat.com, jens.wiklander@linaro.org, corbet@lwn.net,
	jmorris@namei.org, serge@hallyn.com, casey@schaufler-ca.com,
	janne.karhunen@gmail.com, daniel.thompson@linaro.org,
	Markus.Wamser@mixed-mode.de, lhinds@redhat.com,
	keyrings@vger.kernel.org, linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	op-tee@lists.trustedfirmware.org,
	Kenneth Goldman <kgoldman@us.ibm.com>,
	gcwilson@linux.ibm.com, zgu@us.ibm.com, stefanb@us.ibm.com,
	NAYNA JAIN1 <naynjain@ibm.com>
Subject: Re: [PATCH v8 3/4] doc: trusted-encrypted: updates with TEE as a new trust source
Date: Tue, 8 Dec 2020 19:49:06 +0200	[thread overview]
Message-ID: <20201208174906.GA58572@kernel.org> (raw)
In-Reply-To: <ba6cd934bf7460cf6e9fc101a759a63fdd4e6e9b.camel@linux.ibm.com>

On Tue, Dec 08, 2020 at 10:02:57AM -0500, Mimi Zohar wrote:
> Hi Jarkko,
> 
> On Fri, 2020-12-04 at 17:30 +0200, Jarkko Sakkinen wrote:
> > On Wed, Dec 02, 2020 at 02:34:07PM -0500, gmail Elaine Palmer wrote:
> > > Hi Sumit,  
> > > 
> > > Thank you for the detailed descriptions and examples of trust sources
> > > for Trusted Keys.   A group of us in IBM (Stefan Berger, Ken Goldman,
> > > Zhongshu Gu, Nayna Jain, Elaine Palmer, George Wilson, Mimi Zohar)
> > > have been doing related work for quite some time, and we have one
> > > primary concern and some suggested changes to the document. 
> > > 
> > > Our primary concern is that describing a TEE as a Trust Source needs
> > > to be more specific.   For example, "ARM TrustZone" is not sufficient,
> > > but "wolfSSL embedded SSL/TLS library with ARM TrustZone
> > > CryptoCell-310" is.  Just because a key is protected by software
> > > running in a TEE is not enough to establish trust.  Just like
> > > cryptographic modules, a Trust Source should be defined as a specific
> > > implementation on specific hardware with well-documented environmental
> > > assumptions, dependencies, and threats.
> > > 
> > > In addition to the above concern, our suggested changes are inline
> > > below.
> > 
> > In order to give a decent review comment it should have two ingredients:
> > 
> > - Where the existing line of code / text / whatever goes wrong.
> > - How it should modified and why that makes sense. And use as plain
> >   English and non-academic terms as possible, if it is documentation.
> >   Further, scope is only the kernel implementation, no more or no
> >   less.
> > 
> > "do this" is not unfortunately an argument. Feedback is welcome when
> > it is supported by something common sensse.
> 
> Even after the code is fully debugged, reviewed and tested, our concern
> is that people will assume the security guarantees of TEE based trusted
> keys to be equivalent to that of a discrete TPM.
> 
> > 
> > Some meta suggestion of related to email:
> > 
> > Please also use a proper email client and split your paragraphs into
> > at most 80 character lines with new line characters when writing email.
> > I prefer to use 72 character line length so that there's some space
> > for longer email threads.
> 
> Sure, we'll re-post the suggested documentation changes/additions.
> 
> Mimi

So. Wouldn't it be a better idea to post a patch that Sumit could
squash to his (and add co-developed-by tag)?

/Jarkko

  reply	other threads:[~2020-12-08 17:50 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-03 16:01 [PATCH v8 0/4] Introduce TEE based Trusted Keys support Sumit Garg
2020-11-03 16:01 ` [PATCH v8 1/4] KEYS: trusted: Add generic trusted keys framework Sumit Garg
2020-11-24  3:42   ` Jarkko Sakkinen
2021-02-15 13:13     ` Sumit Garg
2021-02-10 17:00   ` Jarkko Sakkinen
2021-02-11 10:34     ` Ahmad Fatoum
2021-02-12 12:22       ` Jarkko Sakkinen
2021-02-15 13:15     ` Sumit Garg
2020-11-03 16:01 ` [PATCH v8 2/4] KEYS: trusted: Introduce TEE based Trusted Keys Sumit Garg
2020-11-24  3:46   ` Jarkko Sakkinen
2021-01-11 16:35   ` Jarkko Sakkinen
2021-01-13 11:17     ` Sumit Garg
2021-01-14  2:05       ` Jarkko Sakkinen
2021-01-15  6:02         ` Sumit Garg
2021-01-19 10:30           ` Jarkko Sakkinen
2021-01-20  1:31             ` Jarkko Sakkinen
2021-01-20  7:23               ` Sumit Garg
2021-01-21  0:01                 ` Jarkko Sakkinen
     [not found]                 ` <01000177223f74d3-1eef7685-4a19-40d2-ace6-d4cd7f35579d-000000@email.amazonses.com>
2021-01-21  8:44                   ` Jerome Forissier
2021-01-21 15:07                     ` Jarkko Sakkinen
2021-01-21 15:24                       ` Jarkko Sakkinen
2021-01-21 16:23                         ` Jerome Forissier
2021-01-22 18:12                           ` Jarkko Sakkinen
2021-01-25  9:17                             ` Sumit Garg
2021-01-27 17:14                               ` Jarkko Sakkinen
2021-01-27 17:19                               ` Jarkko Sakkinen
2021-02-04  0:05                               ` Jarkko Sakkinen
2021-02-11 23:34                               ` Jarkko Sakkinen
2021-02-11 23:35                                 ` Jarkko Sakkinen
2021-02-15 13:07                                 ` Sumit Garg
2021-02-16  7:29                                   ` Jarkko Sakkinen
2021-02-22  7:15                                     ` Sumit Garg
2021-02-24 16:58                                       ` Jarkko Sakkinen
2021-01-20 13:36   ` Ahmad Fatoum
2020-11-03 16:01 ` [PATCH v8 3/4] doc: trusted-encrypted: updates with TEE as a new trust source Sumit Garg
2020-12-02 19:34   ` gmail Elaine Palmer
2020-12-04 15:30     ` Jarkko Sakkinen
2020-12-08 15:02       ` Mimi Zohar
2020-12-08 17:49         ` Jarkko Sakkinen [this message]
2020-12-09 16:50           ` Mimi Zohar
2020-12-11 10:36             ` Jarkko Sakkinen
2020-12-11 15:29               ` Mimi Zohar
2020-12-06 18:51   ` Randy Dunlap
2020-12-08 15:55   ` Mimi Zohar
2020-12-08 17:07     ` Mimi Zohar
2020-11-03 16:01 ` [PATCH v8 4/4] MAINTAINERS: Add myself as Trusted Keys co-maintainer Sumit Garg
2020-11-24  3:46   ` Jarkko Sakkinen
2020-11-05  5:07 ` [PATCH v8 0/4] Introduce TEE based Trusted Keys support Jarkko Sakkinen
2020-11-06  9:32   ` Sumit Garg
2020-11-06 14:52     ` Jarkko Sakkinen
2020-12-04  5:16       ` Jarkko Sakkinen
2020-12-08 11:51         ` Sumit Garg

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