1.\" Copyright (c) 2001 Networks Associates Technology, Inc. 2.\" All rights reserved. 3.\" Copyright (c) 2009 Dmitry V. Levin 4.\" All rights reserved. 5.\" Copyright (c) 2009,2019 Solar Designer 6.\" All rights reserved. 7.\" 8.\" Portions of this software were developed for the FreeBSD Project by 9.\" ThinkSec AS and NAI Labs, the Security Research Division of Network 10.\" Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 11.\" ("CBOSS"), as part of the DARPA CHATS research program. 12.\" 13.\" Redistribution and use in source and binary forms, with or without 14.\" modification, are permitted provided that the following conditions 15.\" are met: 16.\" 1. Redistributions of source code must retain the above copyright 17.\" notice, this list of conditions and the following disclaimer. 18.\" 2. Redistributions in binary form must reproduce the above copyright 19.\" notice, this list of conditions and the following disclaimer in the 20.\" documentation and/or other materials provided with the distribution. 21.\" 3. The name of the author may not be used to endorse or promote 22.\" products derived from this software without specific prior written 23.\" permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35.\" SUCH DAMAGE. 36.\" 37.Dd December 9, 2019 38.Dt PAM_PASSWDQC 8 39.Os "Openwall Project" 40.Sh NAME 41.Nm pam_passwdqc 42.Nd Password quality-control PAM module 43.Sh SYNOPSIS 44.Op Ar service-name 45.Ar module-type 46.Ar control-flag 47.Pa pam_passwdqc 48.Op Ar options 49.Sh DESCRIPTION 50The 51.Nm 52module is a simple password strength checking module for 53PAM. 54In addition to checking regular passwords, it offers support for 55passphrases and can provide randomly generated ones. 56.Pp 57The 58.Nm 59module provides functionality for only one PAM management group: 60password changing. 61In terms of the 62.Ar module-type 63parameter, this is the 64.Dq Li password 65feature. 66.Pp 67The 68.Fn pam_chauthtok 69service function may ask the user for a new password, and verify that 70it meets certain minimum standards. 71If the chosen password is unsatisfactory, the service function returns 72.Dv PAM_AUTHTOK_ERR . 73.Pp 74The set of options that may be passed to the module is exactly the 75same as the set of options that may be specified in the configuration 76file (suggested location 77.Pa /etc/passwdqc.conf , 78to be specified in the 79.Cm config=/etc/passwdqc.conf 80option). These options are described in 81.Xr passwdqc.conf 5 . 82.Sh SEE ALSO 83.Xr pam 3 , 84.Xr pam.conf 5 , 85.Xr passwdqc.conf 5 , 86.Pp 87https://www.openwall.com/passwdqc/ 88.Sh AUTHORS 89The 90.Nm 91module was written for Openwall GNU/*/Linux by 92.An Solar Designer Aq solar at openwall.com . 93This manual page was written for the 94.Fx 95Project by 96ThinkSec AS and NAI Labs, the Security Research Division of Network 97Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 98.Pq Dq CBOSS , 99as part of the DARPA CHATS research program. 100It has since been revised, most importantly to refer to 101.Xr passwdqc.conf 5 102instead of describing the options right on this page. 103