linux-kernel - Re: [PATCH v9,4/4] Documentation/admin-guide/module-signing.rst: add openssl command option example for CodeSign EKU

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Message-ID: <20220831075432.GV5247@linux-l9pv.suse>
Date:   Wed, 31 Aug 2022 15:54:32 +0800
From:   joeyli <jlee@...e.com>
To:     Jarkko Sakkinen <jarkko@...nel.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>,
        Randy Dunlap <rdunlap@...radead.org>,
        Malte Gell <malte.gell@....de>,
        Varad Gautam <varad.gautam@...e.com>,
        Mimi Zohar <zohar@...ux.ibm.com>, keyrings@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9,4/4] Documentation/admin-guide/module-signing.rst: add
 openssl command option example for CodeSign EKU

On Sun, Aug 28, 2022 at 06:35:24AM +0300, Jarkko Sakkinen wrote:
> On Thu, Aug 25, 2022 at 10:23:14PM +0800, Lee, Chun-Yi wrote:
> > Add an openssl command option example for generating CodeSign extended
> > key usage in X.509 when CONFIG_CHECK_CODESIGN_EKU 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 7d7c7c8a545c..ca3b8f19466c 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 is enabled, the following openssl
> > +command option should be added where for generating CodeSign extended key usage
> 
> You have:
> 
> 1. codeSign
> 2. CodeSign
> 3. CodeSigning
> 
> Why this ambiguity?
>

Sorry for the ambiguity. I will use codeSigning in document and patch
description to sync with RFC2459 and openssl.

Thanks a lot!
Joey Lee
 
> > +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.
> > -- 
> > 2.26.2
> > 
> 
> BR, Jarkko