1.\"-
2.\" Copyright (c) 2001-2003 Networks Associates Technology, Inc.
3.\" Copyright (c) 2004-2011 Dag-Erling Smørgrav
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6.\" This software was developed for the FreeBSD Project by ThinkSec AS and
7.\" Network Associates Laboratories, the Security Research Division of
8.\" Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
9.\" ("CBOSS"), as part of the DARPA CHATS research program.
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35.\" $Id$
36.\"
37.Dd May 26, 2012
38.Dt PAM_CHAUTHTOK 3
39.Os
40.Sh NAME
41.Nm pam_chauthtok
42.Nd perform password related functions within the PAM framework
43.Sh LIBRARY
44.Lb libpam
45.Sh SYNOPSIS
46.In sys/types.h
47.In security/pam_appl.h
48.Ft "int"
49.Fn pam_chauthtok "pam_handle_t *pamh" "int flags"
50.Sh DESCRIPTION
51The
52.Fn pam_chauthtok
53function attempts to change the authentication token
54for the user associated with the pam context specified by the
55.Fa pamh
56argument.
57.Pp
58The
59.Fa flags
60argument is the binary or of zero or more of the following
61values:
62.Bl -tag -width 18n
63.It Dv PAM_SILENT
64Do not emit any messages.
65.It Dv PAM_CHANGE_EXPIRED_AUTHTOK
66Change only those authentication tokens that have expired.
67.El
68.Pp
69If any other bits are set,
70.Fn pam_chauthtok
71will return
72.Dv PAM_SYMBOL_ERR .
73.Sh RETURN VALUES
74The
75.Fn pam_chauthtok
76function returns one of the following values:
77.Bl -tag -width 18n
78.It Bq Er PAM_ABORT
79General failure.
80.It Bq Er PAM_AUTHTOK_DISABLE_AGING
81Authentication token aging disabled.
82.It Bq Er PAM_AUTHTOK_ERR
83Authentication token failure.
84.It Bq Er PAM_AUTHTOK_LOCK_BUSY
85Authentication token lock busy.
86.It Bq Er PAM_AUTHTOK_RECOVERY_ERR
87Failed to recover old authentication token.
88.It Bq Er PAM_BUF_ERR
89Memory buffer error.
90.It Bq Er PAM_CONV_ERR
91Conversation failure.
92.It Bq Er PAM_PERM_DENIED
93Permission denied.
94.It Bq Er PAM_SERVICE_ERR
95Error in service module.
96.It Bq Er PAM_SYMBOL_ERR
97Invalid symbol.
98.It Bq Er PAM_SYSTEM_ERR
99System error.
100.It Bq Er PAM_TRY_AGAIN
101Try again.
102.El
103.Sh SEE ALSO
104.Xr pam 3 ,
105.Xr pam_strerror 3
106.Sh STANDARDS
107.Rs
108.%T "X/Open Single Sign-On Service (XSSO) - Pluggable Authentication Modules"
109.%D "June 1997"
110.Re
111.Sh AUTHORS
112The
113.Fn pam_chauthtok
114function and this manual page were
115developed for the
116.Fx
117Project by ThinkSec AS and Network Associates Laboratories, the
118Security Research Division of Network Associates, Inc.\& under
119DARPA/SPAWAR contract N66001-01-C-8035
120.Pq Dq CBOSS ,
121as part of the DARPA CHATS research program.
122