From: Mimi Zohar <zohar@linux.vnet.ibm.com>
To: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Cc: Mikhail Kurinnoi <viewizard@viewizard.com>,
Matthew Garrett <mjg59@google.com>,
linux-integrity <linux-integrity@vger.kernel.org>
Subject: Re: RFC: Make it practical to ship EVM signatures
Date: Wed, 18 Oct 2017 17:07:21 -0400 [thread overview]
Message-ID: <1508360841.4510.64.camel@linux.vnet.ibm.com> (raw)
In-Reply-To: <CACE9dm92snkpP4vM_Jq0M10F9mHOFu5Zce8GB_HesmNDG9h=Rw@mail.gmail.com>
Hi Dmitry,
On Wed, 2017-10-18 at 23:37 +0300, Dmitry Kasatkin wrote:
> May be Mikhail could share GIT url to look somewhere.
> To see latest bits.
Please bottom post in the future.
Summary:
Mikhail's patches were posted earlier this year. His patches defined
a portable EVM signature, which was never written out to disk, but
after being verified, was written out as an HMAC. This was based on
my understanding that the i_ino/uuid is required to prevent a cut &
paste attack.
In the recent discussions, Matthew wanted to know why the i_ino/uuid
is required. After going around and around discussing it, it turns
out including security.ima is equivalent to including the i_ino/uuid.
The i_ino/uuid is only necessary to prevent a cut and paste attack,
when security.ima is not included in the security.evm hmac/signature.
We're at the point of making the portable EVM signature immutable. By
immutable, we mean that it isn't re-written as an HMAC. It is based
on your ima-evm-utils support.
Mikhail, Matthew, did I leave anything out?
Mimi
next prev parent reply other threads:[~2017-10-18 21:07 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-27 22:16 RFC: Make it practical to ship EVM signatures Matthew Garrett
2017-09-27 22:16 ` [PATCH 1/6] IMA: Allow EVM validation on appraisal even without a symmetric key Matthew Garrett
2017-10-01 2:08 ` Mimi Zohar
2017-10-02 17:02 ` Matthew Garrett
2017-10-02 19:41 ` Mimi Zohar
2017-09-27 22:16 ` [PATCH 2/6] EVM: Add infrastructure for making EVM fields optional Matthew Garrett
2017-09-27 22:16 ` [PATCH 3/6] EVM: Allow userland to override the default EVM attributes Matthew Garrett
2017-09-27 22:16 ` [PATCH 4/6] EVM: Add an hmac_ng xattr format Matthew Garrett
2017-09-27 22:16 ` [PATCH 5/6] EVM: Write out HMAC xattrs in the new format Matthew Garrett
2017-09-27 22:16 ` [PATCH 6/6] EVM: Add a new digital signature format Matthew Garrett
2017-09-28 20:12 ` RFC: Make it practical to ship EVM signatures Mimi Zohar
2017-09-28 21:13 ` Matthew Garrett
2017-09-29 0:53 ` Mimi Zohar
2017-09-29 18:09 ` Matthew Garrett
2017-09-29 19:02 ` Mimi Zohar
2017-09-29 19:17 ` Matthew Garrett
2017-09-29 20:01 ` Mimi Zohar
2017-09-29 20:09 ` Matthew Garrett
2017-10-01 2:36 ` Mimi Zohar
2017-10-02 17:09 ` Matthew Garrett
2017-10-02 19:54 ` Mimi Zohar
[not found] ` <CACdnJutYw7Pgh-EwWuwp9Wz+5KzoreZVr+c6UV30zC__8FZSVA@mail.gmail.com>
[not found] ` <1506974574.5691.304.camel@linux.vnet.ibm.com>
2017-10-02 20:07 ` Matthew Garrett
2017-10-09 17:51 ` Mimi Zohar
2017-10-09 17:59 ` Matthew Garrett
2017-10-09 18:15 ` Mimi Zohar
2017-10-09 18:18 ` Matthew Garrett
2017-10-09 18:40 ` Mimi Zohar
[not found] ` <20171009232314.545de76a@totoro>
[not found] ` <1507583449.3748.46.camel@linux.vnet.ibm.com>
[not found] ` <20171010003326.6409ae23@totoro>
2017-10-09 21:40 ` Mimi Zohar
2017-10-09 23:10 ` Mikhail Kurinnoi
2017-10-10 19:07 ` Mimi Zohar
2017-10-12 23:09 ` Dmitry Kasatkin
2017-10-18 19:48 ` Dmitry Kasatkin
2017-10-18 20:30 ` Mimi Zohar
2017-10-18 20:37 ` Dmitry Kasatkin
2017-10-18 21:02 ` Mikhail Kurinnoi
2017-10-18 21:07 ` Mimi Zohar [this message]
2017-10-19 10:14 ` Dmitry Kasatkin
2017-10-19 11:43 ` Mimi Zohar
2017-10-19 17:08 ` Matthew Garrett
2017-10-19 18:38 ` Dmitry Kasatkin
2017-10-19 10:36 ` Dmitry Kasatkin
2017-10-19 11:45 ` Mimi Zohar
2017-10-02 14:53 ` Roberto Sassu
2017-10-02 8:55 ` Roberto Sassu
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