linux-kernel - Re: [PATCH 4/4] Documentation/admin-guide/module-signing.rst: add openssl command option example for CodeSign EKU

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Date:   Thu, 26 Nov 2020 14:58:26 +0800
From:   joeyli <jlee@...e.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     "Lee, Chun-Yi" <joeyli.kernel@...il.com>,
        David Howells <dhowells@...hat.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Ben Boeckel <me@...boeckel.net>,
        Malte Gell <malte.gell@....de>, keyrings@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] Documentation/admin-guide/module-signing.rst: add
 openssl command option example for CodeSign EKU

Hi Randy,

Thanks for your review! I will update it in next version.

Joey Lee

On Wed, Nov 25, 2020 at 09:25:51AM -0800, Randy Dunlap wrote:
> Hi--
> 
> On 11/24/20 11:26 PM, Lee, Chun-Yi wrote:
> > Add an openssl command option example for generating CodeSign extended
> > key usage in X.509 when CONFIG_CHECK_CODESIGN_EKU be enabled.
> 
>                                                     is enabled.
> 
> > 
> > Signed-off-by: "Lee, Chun-Yi" <jlee@...e.com>
> > ---
> >  Documentation/admin-guide/module-signing.rst | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/Documentation/admin-guide/module-signing.rst b/Documentation/admin-guide/module-signing.rst
> > index f8b584179cff..bc184124d646 100644
> > --- a/Documentation/admin-guide/module-signing.rst
> > +++ b/Documentation/admin-guide/module-signing.rst
> > @@ -170,6 +170,12 @@ generate the public/private key files::
> >  	   -config x509.genkey -outform PEM -out kernel_key.pem \
> >  	   -keyout kernel_key.pem
> >  
> > +When ``CONFIG_CHECK_CODESIGN_EKU`` option be enabled, the following openssl
> 
>                                              is enabled,
> 
> > +command option should be added for generating CodeSign extended key usage in
> > +X.509::
> > +
> > +        -addext "extendedKeyUsage=codeSigning"
> > +
> >  The full pathname for the resulting kernel_key.pem file can then be specified
> >  in the ``CONFIG_MODULE_SIG_KEY`` option, and the certificate and key therein will
> >  be used instead of an autogenerated keypair.
> > 
> 
> 
> -- 
> ~Randy