Messages in this thread | | | Subject | Re: [PATCH 10/8] modsign: Allow password to be specified for signing key | From | David Woodhouse <> | Date | Tue, 19 May 2015 17:15:12 +0100 |
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On Tue, 2015-05-19 at 18:50 +0300, Petko Manolov wrote: > On 15-05-19 15:45:58, David Woodhouse wrote: > > We don't want this in the Kconfig since it might then get exposed in > > /proc/config.gz. So make it a parameter to Kbuild instead. This also > > means we don't have to jump through hoops to strip quotes from it, as > > we would if it was a config option. > > If it were on a network-less, secure sign/build server i'd say it is OK. > > However, exposing your private key's password in an environment variable on a > regular Linux box is a bit fishy.
I don't quite understand the objection.
If you want the modules to be signed with an external key of your choice, then for the duration of the 'make modules_sign' run (or 'make modules_install if CONFIG_MODULE_SIG_ALL=y) surely the password has to be available *somehow*?
You are, of course, free to sign the modules by invoking sign-file directly. In which case you *still* need to provide it with the password for the key somehow, if there is one.
Mimi quite rightly pointed out that my original mechanism for this, a CONFIG_MODULE_SIG_KEY_PASSWORD option, was inadvertently exposing it more than was necessary.
As it is now, you *only* need it in the environment for the duration of the operations that actually *use* it.
Do you have a better suggestion?
-- David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation
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