vucheckpw-1.02 is a simple and flexible checkpassword interface package. vucheckpw is a package of programs designed to manage virtual users.
vucheckpw checks password which is stored in a file in the Maildir directory. The file has read and write permissions to the user only. vucheckpw checks virtual user's password. For real users, checkpw is available as a separate package.
Before invoking following program, checkpw and checkapoppw set up $USER, $EXT, $HOME and its working directory.
INSTALL says how to set up.
The code is in the public domain.
The original checkpassword program is written by D.J.Bernstein: http://cr.yp.to/checkpwd.html