It works! I have Digest Authentication working in PHP. It’s the client side, which I think hasn’t been done before. Like I thought, it wasn’t that hard. It works for the simplest (but most common? only?) case, where qop=auth and algorithm=MD5. There was one tool I needed that I was really glad to have: tcpdump. Yet another reason why Macs rule: they come with a packet trace utility all installed and ready to go, just waiting there in /usr/sbin for the day you realize you need it.

I’ll release a version of Snoopy that uses PHP’s native SSL support (if available) and this new feature in… a while. I need to clean it up significantly first.