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RE: OCSP for LDAP Client
This page has a decent breakdown of verifying:
Step one would likely start with with 'get cert from your ldap node/vip' - and in my environment at least, returns the configured chain, which help you move on to the next step.
PS: If this is old news to you, feel free to ignore this. :)
From: openldap-technical [mailto:firstname.lastname@example.org] On Behalf Of Howard Chu
Sent: Thursday, January 28, 2016 3:09 PM
To: Jason Talley <email@example.com>; firstname.lastname@example.org
Subject: Re: OCSP for LDAP Client
Jason Talley wrote:
> I've been asked to enable OCSP checking in our client (connecting to
> any LDAP
> server) . The client uses OpenLdap api's for managing the connection
> to the server. From my recent birth-by-fire education on certs and
> security, OCSP checking appears more or less to be a manual process
> rather than having OpenSSL do all the work auto-magically as part of
> the handshake (ignoring ocsp stapling which I'm avoiding). I don't
> see any options in openssl s_client (for testing) to enable OCSP --
> only a separate utility to manually check based on captured client certs.
> Storing the CRL in the LDAP DB isn't an option. For whatever reason,
> OCSP is required.
> Is there any way to enable OCSP checking via the current LDAP API?
There is nothing in the LDAP API for this.
> the answer is no, then would a reasonable approach be to manually
> query the server URL from time to time, and verify the certificate in the background?
> Traffic from our client should be relatively minimal, so even at a
> rate of one verification an hour should have a minimal risk window of
> the cert being expired. Using this method I can more or less follow
> the same logic as the openssl utilities (s_client and ocsp).
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
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