Binary package “libpam-passwdqc” in ubuntu precise
PAM module for password strength policy enforcement
passwdqc is a password/passphrase strength checking and policy enforcement
toolset, including a PAM module (libpam-passwdqc), command-line programs
(pwqcheck and pwqgen), and a library (libpasswdqc0).
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pam_passwdqc (optionally) integrates with PAM such that it gets invoked when
users change their passwords. The module is capable of checking password or
passphrase strength, enforcing a policy, and offering randomly-generated
passphrases, with all of these features being optional and easily
(re-)configurable.