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.
This patch depends on the ECDSA support series currently queued here:
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git/log/?h=ecc
Stefan
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 | 14 ++++++++++++++
crypto/asymmetric_keys/pkcs7_parser.c | 8 ++++++++
3 files changed, 48 insertions(+)
--
2.29.2
On Fri, Apr 23, 2021 at 11:12:45AM -0400, Stefan Berger wrote:
> 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.
>
> This patch depends on the ECDSA support series currently queued here:
> https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git/log/?h=ecc
>
> Stefan
>
> 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 | 14 ++++++++++++++
> crypto/asymmetric_keys/pkcs7_parser.c | 8 ++++++++
> 3 files changed, 48 insertions(+)
>
> --
> 2.29.2
>
>
I just went through v3. My tags apply also to this version.
/Jarkko