In the last episode (Nov 22), Peter Bortas @ Pike developers forum said:
No. The most complete one is looked up somewhere in Linköping Universitys password management system*. That also delt with the setsid magic needed for yppasswd, passwd and friends. But it lacked a sane API so I never got around to extract it and contribute it to Pike proper before ending my employment there.
Good thing there's System.PAM from monger nowadays; that's what I used for a web-based password reset interface.