[PATCH v6 0/4] Add support for ECDSA-signed kernel modules
stefanb at linux.ibm.com
Mon Jun 14 19:20:43 UTC 2021
On 6/14/21 3:19 PM, Jarkko Sakkinen wrote:
> On Thu, Jun 10, 2021 at 08:56:19AM -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:
>> - Patch 2/4 is fixing V4's 1/2 and 4/4 is fixing V4's 2/2. Both fixup
>> patches to be squashed.
>> - do not touch the key files if openssl is not installed; likely
>> addresses an issue pointed out by kernel test robot
>> - 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
>> - Adjustment to ECDSA key detector string in 2/2
>> - Rephrased cover letter and patch descriptions with Mimi
>> Stefan Berger (4):
>> certs: Trigger creation of RSA module signing key if it's not an RSA
>> certs: Check whether openssl tool is available
>> certs: Add support for using elliptic curve keys for signing modules
>> certs: Adjustment due to 'Check whether openssl tool is available'
>> certs/Kconfig | 26 ++++++++++++++++++++++++++
>> certs/Makefile | 21 +++++++++++++++++++++
>> crypto/asymmetric_keys/pkcs7_parser.c | 8 ++++++++
>> 3 files changed, 55 insertions(+)
> Since you know the commit ID's in
> you could just use fixes-tags and send exactly two patch series. Works
> better with various tools (e.g. https://pypi.org/project/b4/)
So you are not taking v6's 2/4 and 4/4 ?
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