search for: engine_load_dynam

...e RSA-based tunnel. OpenSSH would need no information built into it to accomodate any particular engine. One approach to this would be that taken by Stunnel (http://www.stunnel.org/). Stunnel first loads the internal engine 'dynamic'. It then uses ENGINE_load_builtin_engines(), but I think ENGINE_load_dynamic() would be more efficient. Next a series of ENGINE_ctrl_cmd_string() and other engine(1) calls are used to locate, name, load and initialize an external engine. IMHO, they did a very nice job of achieving a highly versatile implementation. It was easy to configure in the particular engine I use....