NAME

       pwhistory_helper - Helper binary that transfers password hashes from passwd or shadow to
       opasswd

SYNOPSIS

       pwhistory_helper [...]

DESCRIPTION

       pwhistory_helper is a helper program for the pam_pwhistory module that transfers password
       hashes from passwd or shadow file to the opasswd file and checks a password supplied by
       user against the existing hashes in the opasswd file.

       The purpose of the helper is to enable tighter confinement of login and password changing
       services. The helper is thus called only when SELinux is enabled on the system.

       The interface of the helper - command line options, and input/output data format are
       internal to the pam_pwhistory module and it should not be called directly from
       applications.

SEE ALSO

       pam_pwhistory(8)

AUTHOR

       Written by Tomas Mraz based on the code originally in pam_pwhistory and pam_unix modules.