Re: [RFD] linux-firmware key arrangement for firmware signing

Mimi Zohar
2015-05-26T19:52:51Z

On Tue, 2015-05-26 at 18:08 +0100, One Thousand Gnomes wrote:

> IMHO we want the supplier of a given firmware providing signatures on
> the firmware git tree if this is done. A generic linux-firmware owned key
> would be both a horrendously inviting attack target, and a single point of
> failure.
>
> Git can already do all the needed commit signing bits unless I'm missing
> something here ?

Nice! I haven't tried signing commits yet. Assuming the signatures can
be extracted from git, the firmware blob git commit signature could be
stored either as a security xattr or appended (eg. similar to kernel
modules). The end system owner could then make the decision to load the
associated public key or not.

Mimi