I was just about to send them another mail when I stumbled on fprint, a GPL based fingerprint abstraction layer that includes reversed engineered drivers for the UPEK devices. The drivers live in user land and the USB bus is accessed through libusb which already is ported to FreeBSD. So, getting a more stable support for fingerprint devices than the binary-only UPEK drivers should only be a matter of porting this library to FreeBSD.

Woho…no more BioAPI-hell (worst. library. ever.). I’m not yet motivated enough to do a port myself, maybe if I get some more free time.

Update: Apparently they did a release, but two people have reported problems with Undefined symbol “GuiCallback”.  I’ll take a look and see if I’m able to use it. At least the beta driver I was given worked, but I never tested it together with the PAM module.