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Date:   Wed, 25 Nov 2020 09:25:51 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     "Lee, Chun-Yi" <joeyli.kernel@...il.com>,
        David Howells <dhowells@...hat.com>
Cc:     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,
        "Lee, Chun-Yi" <jlee@...e.com>
Subject: Re: [PATCH 4/4] Documentation/admin-guide/module-signing.rst: add
 openssl command option example for CodeSign EKU

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

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