OCSP Server

OCSP Server is a minimal implementation of both a OCSP and CRL server in Golang, using a single CRL as the source for both interfaces. Originally created by Florian Bauer and now adapted for Spacebar. It provides the following http endpoints:

Endpoint	Description
/ocsp	OCSP responder supporting both GET and POST requests
/crl	CRL responder in DER format
/crl.pem	CRL responder in PEM format
/ca	Issuer CA certificate in DER format
/ca.pem	Issuer CA certificate in PEM format

You need to provide a CRL file, the root certificate and cert/key with extendedKeyUsage OCSPSigning to allow the OCSP server to sign the OCSP responses. When using OCSP, the certificate is checked against the CRL for validity.

Synchronization of the CAs CRL is out of scope of this project. You can use any mechanism to update the CRL file. Just notify the ocspcrl server process via SIGHUP signal to reload the CRL file.