linux-kernel - Re: [PATCH v4 3/6] KEYS: X.509: Parse Basic Constraints for CA

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Date:   Wed, 08 Feb 2023 16:01:56 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Eric Snowberg <eric.snowberg@...cle.com>, jarkko@...nel.org,
        dhowells@...hat.com, dwmw2@...radead.org
Cc:     herbert@...dor.apana.org.au, davem@...emloft.net,
        dmitry.kasatkin@...il.com, paul@...l-moore.com, jmorris@...ei.org,
        serge@...lyn.com, pvorel@...e.cz, tadeusz.struk@...el.com,
        kanth.ghatraju@...cle.com, konrad.wilk@...cle.com,
        erpalmer@...ux.vnet.ibm.com, coxu@...hat.com,
        keyrings@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v4 3/6] KEYS: X.509: Parse Basic Constraints for CA

On Mon, 2023-02-06 at 21:59 -0500, Eric Snowberg wrote:
> Parse the X.509 Basic Constraints.  The basic constraints extension
> identifies whether the subject of the certificate is a CA.
> 
> BasicConstraints ::= SEQUENCE {
>         cA                      BOOLEAN DEFAULT FALSE,
>         pathLenConstraint       INTEGER (0..MAX) OPTIONAL }
> 
> If the CA is true, store it in the public_key.  This will be used
> in a follow on patch that requires knowing if the public key is a CA.
> 
> Link: https://www.rfc-editor.org/rfc/rfc5280#section-4.2.1.9
> Signed-off-by: Eric Snowberg <eric.snowberg@...cle.com>

Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>