Hi,

> Dmitrij Mironov wrote:

>    This extension MUST appear in certificates that contain public keys
>    that are used to validate digital signatures on other public key
>    certificates or CRLs.  When this extension appears, it SHOULD be
>    marked critical.

It MUST appear but it SHOULD be marked as critical

> As I understand from this - CA (in most cases) must have key usage
> extension
> and CA/end user certificates which have key usage ext. MUST have it marked
> critical. By default OpenCA certificates are issued with non critical
> extensions. Is this bug in OpenCA or those certificates profiles are
> defined
> only as examples?

I wouldn't mark any extension as critical unless the certificate and crl
profile says I must (e.g for a CA certificate).
In case an extension is critical and the application does not know it, it
will fail.

Regards




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