[libksba] Libksba behaviour wrt. certificates with no extensions

[Dmitry Eremin-Solenikov]

Hello,

I'm debugging libksba behaviour wrt. a very lame certificate -
it's a self signed certificate with no extensions defined used
to sign/encrypt S/MIME messages. I'm attaching a certificate
to the e-mail (it comes from an example at RFC 4491).

The problem is that when asked for ksba_cert_is_ca() ->
ksba_get_extension() -> read_extension() it (if I debugged
it right) finds a dummy extension node, sets cert->cache.n_extns
to 1 then fails the OID check and returns GPG_ERR_NO_VALUE.

>From my understanding _ksba_asn_find_node should have returned
NULL, as there are no extensions in the certificate.

Is it a bug? Is it a misfuture?

-- 
With best wishes
Dmitry
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