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From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Jarkko Sakkinen <jarkko@kernel.org>,
	Mimi Zohar <zohar@linux.ibm.com>,
	Nayna <nayna@linux.vnet.ibm.com>,
	Eric Snowberg <eric.snowberg@oracle.com>,
	David Howells <dhowells@redhat.com>
Cc: keyrings@vger.kernel.org,
	linux-integrity <linux-integrity@vger.kernel.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	"David S . Miller" <davem@davemloft.net>,
	James Morris <jmorris@namei.org>,
	"Serge E . Hallyn" <serge@hallyn.com>,
	keescook@chromium.org, gregkh@linuxfoundation.org,
	torvalds@linux-foundation.org, scott.branden@broadcom.com,
	weiyongjun1@huawei.com, nayna@linux.ibm.com, ebiggers@google.com,
	ardb@kernel.org,
	Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
	lszubowi@redhat.com, linux-kernel@vger.kernel.org,
	linux-crypto@vger.kernel.org,
	linux-security-module@vger.kernel.org, pjones@redhat.com,
	"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
	Patrick Uiterwijk <patrick@puiterwijk.org>
Subject: Re: [PATCH v4 00/12] Enroll kernel keys thru MOK
Date: Wed, 25 Aug 2021 15:27:18 -0700	[thread overview]
Message-ID: <bc37d1da3ef5aae16e69eeda25d6ce6fe6a51a77.camel@HansenPartnership.com> (raw)
In-Reply-To: <9067ff7142d097698b827f3c1630a751898a76bf.camel@kernel.org>

On Thu, 2021-08-26 at 01:21 +0300, Jarkko Sakkinen wrote:
> On Tue, 2021-08-24 at 10:34 -0400, Mimi Zohar wrote:
> > > > > Jarkko, I think the emphasis should not be on "machine" from
> > > > > Machine Owner Key (MOK), but on "owner".  Whereas Nayna is
> > > > > focusing more on the "_ca" aspect of the name.   Perhaps
> > > > > consider naming it "system_owner_ca" or something along those
> > > > > lines.
> > > > What do you gain such overly long identifier? Makes no sense.
> > > > What is "ca aspect of the name" anyway?
> > > 
> > > As I mentioned previously, the main usage of this new keyring is
> > > that it should contain only CA keys which can be later used to
> > > vouch for user keys loaded onto secondary or IMA keyring at
> > > runtime. Having ca in the  name like .xxxx_ca, would make the
> > > keyring name self-describing. Since you preferred .system, we can
> > > call it .system_ca.
> > 
> > Sounds good to me.  Jarkko?
> > 
> > thanks,
> > 
> > Mimi
> 
> I just wonder what you exactly gain with "_ca"?

Remember, a CA cert is a self signed cert with the CA:TRUE basic
constraint.  Pretty much no secure boot key satisfies this (secure boot
chose deliberately NOT to use CA certificates, so they're all some type
of intermediate or leaf), so the design seems to be only to pick out
the CA certificates you put in the MOK keyring.  Adding the _ca suffix
may deflect some of the "why aren't all my MOK certificates in the
keyring" emails ...

James



  reply	other threads:[~2021-08-25 22:27 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-19  0:20 Eric Snowberg
2021-08-19  0:20 ` [PATCH v4 01/12] integrity: Introduce a Linux keyring for the Machine Owner Key (MOK) Eric Snowberg
2021-08-19  0:20 ` [PATCH v4 02/12] integrity: Do not allow mok keyring updates following init Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 03/12] KEYS: CA link restriction Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 04/12] integrity: restrict INTEGRITY_KEYRING_MOK to restrict_link_by_ca Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 05/12] integrity: add new keyring handler for mok keys Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 06/12] KEYS: add a reference to mok keyring Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 07/12] KEYS: Introduce link restriction to include builtin, secondary and mok keys Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 08/12] KEYS: integrity: change link restriction to trust the mok keyring Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 09/12] KEYS: link secondary_trusted_keys to mok trusted keys Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 10/12] integrity: store reference to mok keyring Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 11/12] integrity: Trust MOK keys if MokListTrustedRT found Eric Snowberg
2021-08-19  0:21 ` [PATCH v4 12/12] integrity: Only use mok keyring when uefi_check_trust_mok_keys is true Eric Snowberg
2021-08-19 11:38 ` [PATCH v4 00/12] Enroll kernel keys thru MOK Jarkko Sakkinen
2021-08-19 13:10   ` Mimi Zohar
2021-08-19 15:23     ` Eric Snowberg
2021-08-19 17:32       ` Mimi Zohar
2021-08-23 17:51         ` Jarkko Sakkinen
2021-08-23 20:48           ` Nayna
2021-08-24 14:34             ` Mimi Zohar
2021-08-25 22:21               ` Jarkko Sakkinen
2021-08-25 22:27                 ` James Bottomley [this message]
2021-08-27 20:44                   ` Nayna
2021-08-30 17:39                     ` Eric Snowberg
2021-09-01  0:52                       ` Nayna
2021-09-01  1:51                         ` Eric Snowberg
2021-09-02 10:18                           ` Mimi Zohar
2021-09-01  4:34                     ` Jarkko Sakkinen
2021-09-01  4:36                       ` Jarkko Sakkinen
2021-09-01  4:46                         ` Jarkko Sakkinen
2021-08-23 17:37       ` Jarkko Sakkinen
2021-08-23 17:35     ` Jarkko Sakkinen
2021-08-23 17:48       ` Eric Snowberg

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