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SubjectRe: [PATCH v8 0/2] Add support for ECDSA-signed kernel modules
On Tue, Jun 29, 2021 at 05:34:19PM -0400, Stefan Berger wrote:
> From: Stefan Berger <stefanb@linux.ibm.com>
>
> This series adds support for ECDSA-signed kernel modules. It also
> attempts to address a kbuild issue where a developer created an ECDSA
> key for signing kernel modules and then builds an older version of the
> kernel, when bisecting the kernel for example, that does not support
> ECDSA keys.
>
> The first patch addresses the kbuild issue of needing to 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
> backported 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.
>
> Stefan
>
> v8:
> - Removed R-b tags and reordered Cc tags
>
> v7:
> - Changed Kconfig reference to kernel version from 5.11 to 5.13
> - Redirecting stderr of openssl to NULL device to address kernel robot
> detected issue
> - Replaced $(CONFIG_MODULE_SIG_KEY) with "certs/signing_key.pem" following
> Linus's suggestion
>
> v6:
> - Patch 2/4 is fixing V4's 1/2 and 4/4 is fixing V4's 2/2. Both fixup
> patches to be squashed.
>
> v5:
> - do not touch the key files if openssl is not installed; likely
> addresses an issue pointed out by kernel test robot
>
> v4:
> - extending 'depends on' with MODULES to (IMA_APPRAISE_MODSIG && MODULES)
>
> v3:
> - added missing OIDs for ECDSA signed hashes to pkcs7_sig_note_pkey_algo
> - added recommendation to use string hash to Kconfig help text
>
> v2:
> - Adjustment to ECDSA key detector string in 2/2
> - Rephrased cover letter and patch descriptions with Mimi
>
>
> Stefan Berger (2):
> certs: Trigger creation of RSA module signing key if it's not an RSA
> key
> certs: Add support for using elliptic curve keys for signing modules
>
> certs/Kconfig | 26 ++++++++++++++++++++++++++
> certs/Makefile | 21 +++++++++++++++++++++
> crypto/asymmetric_keys/pkcs7_parser.c | 8 ++++++++
> 3 files changed, 55 insertions(+)
>
> --
> 2.31.1
>
>

LGTM

For both:

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

/Jarkko

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