linux-kernel - [PATCH 0/2] Add support for ECDSA-signed kernel modules

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Message-Id: <20210406185340.1079403-1-stefanb@linux.ibm.com>
Date:   Tue,  6 Apr 2021 14:53:38 -0400
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     keyrings@...r.kernel.org, dhowells@...hat.com, zohar@...ux.ibm.com,
        jarkko@...nel.org
Cc:     nayna@...ux.ibm.com, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, Stefan Berger <stefanb@...ux.ibm.com>
Subject: [PATCH 0/2] Add support for ECDSA-signed kernel modules

This series adds support for ECDSA-signed kernel modules.

The first patch in this series attempts to address the issue where a
developer created an ECDSA key for signing modules and then falls back
to compiling an older version of the kernel that does not support
ECDSA keys. In this case this patch would delete that ECDSA key if it is
in certs/signing_key.pem and trigger the creation of an RSA key. However,
for this to work this patch would have to be applied to previous versions
of the kernel but would also only work for the developer if he/she used a
stable version of the kernel to which this patch was applied. So whether
this patch actually achieves the wanted effect is not always guaranteed.

The 2nd patch adds the support for the ECSDA-signed kernel modules.

This series depends on Nayna's series https://lkml.org/lkml/2021/3/30/571
and my ECDSA support series currently queued here:
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git/log/?h=ecc

  Stefan

Stefan Berger (2):
  certs: Trigger recreation of module signing key if it's not an RSA key
  certs: Add support for using elliptic curve keys for signing modules

 certs/Kconfig                         | 25 +++++++++++++++++++++++++
 certs/Makefile                        | 14 ++++++++++++++
 crypto/asymmetric_keys/pkcs7_parser.c |  4 ++++
 3 files changed, 43 insertions(+)

-- 
2.29.2