X.509 Certificate Generator Templates

Currently, OpenWISP restricts automated X.509 certificate generation exclusively to OpenVPN clients, which limits administrators who need general-purpose certificates for web services, internal APIs, or device authentication. This project introduces a new standalone certificate template type that leverages the existing infrastructure to generate certificates using a selected Certificate Authority and a reusable blueprint. Key deliverables include full certificate lifecycle management, configuration template variable integration, admin UI and REST API updates, comprehensive automated testing, and detailed documentation