libpam-pwquality binary package in Ubuntu Xenial amd64

 libpwquality's purpose is to provide common functions for password
 quality checking and also scoring them based on their apparent randomness. The
 library also provides a function for generating random passwords with good
 pronounceability.
 .
 This module can be plugged into the password stack of a given service to
 provide some plug-in strength-checking for passwords. The code was originaly
 based on pam_cracklib module and the module is backwards compatible with its
 options.

Source package