Bug 38214 - Customize kernel module signing key
Customize kernel module signing key
Product: UCS
Classification: Unclassified
Component: Kernel
UCS 4.2
Other Linux
: P5 normal (vote)
: UCS 4.x
Assigned To: UCS maintainers
Depends on: 36335
Blocks: 36383 39527
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Reported: 2015-04-08 14:01 CEST by Philipp Hahn
Modified: 2020-07-03 20:54 CEST (History)
4 users (show)

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Description Philipp Hahn univentionstaff 2015-04-08 14:01:17 CEST
Our signed kernel modules use the default "Magrathea" key, which just looks trange.
We should generate a customized "Univention" key following <https://www.kernel.org/doc/Documentation/module-signing.txt> → "GENERATING SIGNING KEYS", as this (currently) generates some strange errors like
> kernel: Request for unknown module key 'Magrathea: Glacier sining key: ...' err -11

See end of kernel/Makefile: it is enough to provide a custom file x509.genkey.

+++ This bug was initially created as a clone of Bug #36335 +++
Comment 1 Philipp Hahn univentionstaff 2016-02-11 09:12:55 CET
With dd2f6c4481debfa389c1f2b2b1d5bd6449c42611 (v3.18-rc1) but without e7c87bef7de2417b219d4dbfe8d33a0098a8df54 (v4.3-rc4) this breaks loading signed modules:
>  Request for unknown module key 'Build time autogenerated kernel key: 006416f63733d99e57be1fd3a06d66c85b9e2c23' err -11

I requested the inclusion of said patch into 3.18-4.2
Comment 2 Philipp Hahn univentionstaff 2017-04-21 10:53:17 CEST
This would allow us to build custom modules for already released kernels.
On the other hand NSA can't force us to give them a key we don't have.

FYI: The name was changed from "O=Magrathea,CN=Glacier signing key" to "CN = Build time autogenerated kernel key" by git:9c4249c8e0221e5cfae758d35b768aee84abf6c0
Comment 3 Ingo Steuwer univentionstaff 2020-07-03 20:54:44 CEST
This issue has been filed against UCS 4.2.

UCS 4.2 is out of maintenance and many UCS components have changed in later releases. Thus, this issue is now being closed.

If this issue still occurs in newer UCS versions, please use "Clone this bug" or reopen it and update the UCS version. In this case please provide detailed information on how this issue is affecting you.