Well, I now have the libstrophe XMPP library connecting to FB chat non-securely and returning my friends list. I was wrong about them requiring a secure connection, but I still want to implement security anyway.

libstrophe contains tls_openssl.c and tls_gnutls.c, so they already have the TLS stuff abstracted out into modules depending on what SSL library you're using. I guess the next step is to write a tls_matrixssl.c. This isn't too bad so far, but I haven't touched my Mac yet. :beige: