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

[Mimi Zohar]

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 at oracle.com>

Reviewed-by: Mimi Zohar <zohar at linux.ibm.com>