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From: Matthew Garrett <mjg59@google.com>
To: Mimi Zohar <zohar@linux.ibm.com>
Cc: linux-integrity <linux-integrity@vger.kernel.org>,
	David Howells <dhowells@redhat.com>,
	Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Subject: Re: [RFC] kexec: Allow kexec_file() with appropriate IMA policy when locked down
Date: Thu, 14 Mar 2019 14:08:11 -0700	[thread overview]
Message-ID: <CACdnJuv=-Gr9Psd1ABZ=fW43-2FHcgEkG_iu0bY20Jx4Vro=mA@mail.gmail.com> (raw)
In-Reply-To: <1552525698.24794.237.camel@linux.ibm.com>

On Wed, Mar 13, 2019 at 6:08 PM Mimi Zohar <zohar@linux.ibm.com> wrote:
> The IMA hash and EVM hmac combination is fine for offline protection.
> It's used for mutable files.  For immutable files, there must be
> either an IMA or EVM signature.

Ok. Is the correct way to handle this to check that the file has a
signature, or to extend IMA policy to allow it to provide a
requirement that EVM verify a signature rather than an HMAC and have
the arch policy set that?

  reply	other threads:[~2019-03-14 21:08 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-12 19:57 [RFC] kexec: Allow kexec_file() with appropriate IMA policy when locked down Matthew Garrett
2019-03-13 11:58 ` Mimi Zohar
2019-03-13 20:36   ` Matthew Garrett
2019-03-13 21:29     ` Mimi Zohar
2019-03-13 21:59       ` Matthew Garrett
2019-03-14  1:08         ` Mimi Zohar
2019-03-14 21:08           ` Matthew Garrett [this message]
2019-03-14 22:31             ` Mimi Zohar
2019-03-14 22:54               ` Matthew Garrett
2019-03-14 23:58                 ` Mimi Zohar
2019-03-15 22:03                   ` Matthew Garrett
2019-03-17 11:39                     ` Mimi Zohar
2019-03-17 11:39                       ` Mimi Zohar
2019-03-18 19:51                       ` Matthew Garrett
2019-03-18 19:51                         ` Matthew Garrett

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