How BSD Authentication Works.

... OpenBSD on the other hand uses a mechanism called BSD Authentication. It was originally developed for a now-defunct proprietary operating system called BSD/OS by Berkeley Software Design Inc., who later donated the system. It was then adopted by OpenBSD in release 2.9. BSD Auth is comparatively much simpler than PAM. Modules or, authentication "styles", are instead stand alone applications or scripts that communicate over IPC. The module has no ability to interfere with the parent and can very easily revoke permissions using pledge(2) or unveil(2). The BSD Authentication system of configured through login.conf(5)...

https://blog.lambda.cx/posts/how-bsd-authentication-works/

#auth #system