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From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Sumit Garg <sumit.garg@linaro.org>
Cc: Mimi Zohar <zohar@linux.ibm.com>,
	James Bottomley <jejb@linux.ibm.com>,
	dhowells@redhat.com, Jens Wiklander <jens.wiklander@linaro.org>,
	Jonathan Corbet <corbet@lwn.net>,
	James Morris <jmorris@namei.org>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	Casey Schaufler <casey@schaufler-ca.com>,
	Janne Karhunen <janne.karhunen@gmail.com>,
	Daniel Thompson <daniel.thompson@linaro.org>,
	Markus Wamser <Markus.Wamser@mixed-mode.de>,
	"open list:ASYMMETRIC KEYS" <keyrings@vger.kernel.org>,
	linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	Linux Doc Mailing List <linux-doc@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	op-tee@lists.trustedfirmware.org,
	"tee-dev @ lists . linaro . org" <tee-dev@lists.linaro.org>
Subject: Re: [PATCH v4 1/4] KEYS: trusted: Add generic trusted keys framework
Date: Fri, 15 May 2020 03:00:25 +0300	[thread overview]
Message-ID: <956b284c2b144313fd158de75cba510eb98f71bf.camel@linux.intel.com> (raw)
In-Reply-To: <CAFA6WYMciZ=qkG3N_9YWzt_DJr2dGwdAy9diMXCJSNjr2o5ONA@mail.gmail.com>

On Thu, 2020-05-14 at 16:53 +0530, Sumit Garg wrote:
> On Thu, 14 May 2020 at 05:55, Jarkko Sakkinen
> <jarkko.sakkinen@linux.intel.com> wrote:
> > On Wed, 2020-05-06 at 15:10 +0530, Sumit Garg wrote:
> > > Current trusted keys framework is tightly coupled to use TPM device as
> > > an underlying implementation which makes it difficult for implementations
> > > like Trusted Execution Environment (TEE) etc. to provide trusked keys
> > > support in case platform doesn't posses a TPM device.
> > > 
> > > So this patch tries to add generic trusted keys framework where underlying
> > > implemtations like TPM, TEE etc. could be easily plugged-in.
> > > 
> > > Suggested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> > > Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
> > 
> > I tend to agree how this is implemented and could merge it as such.
> > 
> > I'm just thinking if we could refine this patch in a way that instead of
> > copying TRUSTED_DEBUG macro we could just replace pr_info() statements
> > with pr_debug()?
> 
> AFAIU, TRUSTED_DEBUG being a security sensitive operation is only
> meant to be used in development environments and should be strictly
> disabled in production environments. But it may not always be true
> with pr_debug() with CONFIG_DYNAMIC_DEBUG=y which allows the debug
> paths to be compiled into the kernel which can be enabled/disabled at
> runtime.
> 
> IMO we should keep this TRUSTED_DEBUG macro, so that users are aware
> of its security sensitive nature and need to explicitly enable it to
> debug.

You are absolutely correct.

/Jarkko


  reply	other threads:[~2020-05-15  0:00 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-06  9:40 [PATCH v4 0/4] Introduce TEE based Trusted Keys support Sumit Garg
2020-05-06  9:40 ` [PATCH v4 1/4] KEYS: trusted: Add generic trusted keys framework Sumit Garg
2020-05-14  0:25   ` Jarkko Sakkinen
2020-05-14 11:23     ` Sumit Garg
2020-05-15  0:00       ` Jarkko Sakkinen [this message]
2020-06-01  2:00   ` Jarkko Sakkinen
2020-06-01  8:50     ` Sumit Garg
2020-06-02  7:08       ` Jarkko Sakkinen
2020-06-01  2:11   ` Jarkko Sakkinen
2020-06-01  9:11     ` Sumit Garg
2020-06-02  7:14       ` Jarkko Sakkinen
2020-06-02  8:40         ` Sumit Garg
2020-05-06  9:40 ` [PATCH v4 2/4] KEYS: trusted: Introduce TEE based Trusted Keys Sumit Garg
2020-05-14  0:28   ` Jarkko Sakkinen
2020-05-14  7:27     ` Sumit Garg
2020-05-14 23:43       ` Jarkko Sakkinen
2020-05-06  9:40 ` [PATCH v4 3/4] doc: trusted-encrypted: updates with TEE as a new trust source Sumit Garg
2020-05-14  0:29   ` Jarkko Sakkinen
2020-05-06  9:40 ` [PATCH v4 4/4] MAINTAINERS: Add entry for TEE based Trusted Keys Sumit Garg
2020-05-14  0:35   ` Jarkko Sakkinen
2020-05-12  9:20 ` [PATCH v4 0/4] Introduce TEE based Trusted Keys support Sumit Garg

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