Hi! Do you need OCSP (Online Certificate Status Protocol) in wolfSSL? We added OCSP as a wolfSSL feature back in 2011. At this point it is well tested by our users and well into the deployment phase. More information on the protocol is available here: http://www.ietf.org/rfc/rfc2560.txt. The gist of the feature is that a client can go out and check to see the status of a certificate. OCSP is the modern CRL.
If you have questions about our OCSP support, just email us at email@example.com.