1.\"-
2.\" Copyright (c) 2001-2003 Networks Associates Technology, Inc.
3.\" Copyright (c) 2004-2007 Dag-Erling Smørgrav
4.\" All rights reserved.
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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.\" $P4$
36.\"
37.Dd December 21, 2007
38.Dt OPENPAM_NULLCONV 3
39.Os
40.Sh NAME
41.Nm openpam_nullconv
42.Nd null conversation function
43.Sh LIBRARY
44.Lb libpam
45.Sh SYNOPSIS
46.In sys/types.h
47.In security/pam_appl.h
48.In security/openpam.h
49.Ft "int"
50.Fn openpam_nullconv "int n" "const struct pam_message **msg" "struct pam_response **resp" "void *data"
51.Sh DESCRIPTION
52The
53.Nm
54function is a null conversation function suitable
55for applications that want to use PAM but don't support interactive
56dialog with the user.
57Such applications should set
58.Dv PAM_AUTHTOK
59to whatever authentication
60token they've obtained on their own before calling
61.Xr pam_authenticate 3
62and / or
63.Xr pam_chauthtok 3 ,
64and their PAM configuration should specify the
65.Dv use_first_pass
66option for all modules that require access to the
67authentication token, to make sure they use
68.Dv PAM_AUTHTOK
69rather than
70try to query the user.
71.Pp
72.Sh RETURN VALUES
73The
74.Nm
75function returns one of the following values:
76.Bl -tag -width 18n
77.It Bq Er PAM_CONV_ERR
78Conversation failure.
79.El
80.Sh SEE ALSO
81.Xr openpam_ttyconv 3 ,
82.Xr pam 3 ,
83.Xr pam_authenticate 3 ,
84.Xr pam_chauthtok 3 ,
85.Xr pam_prompt 3 ,
86.Xr pam_set_item 3 ,
87.Xr pam_strerror 3 ,
88.Xr pam_vprompt 3
89.Sh STANDARDS
90The
91.Nm
92function is an OpenPAM extension.
93.Sh AUTHORS
94The
95.Nm
96function and this manual page were developed for the
97.Fx
98Project by ThinkSec AS and Network Associates Laboratories, the
99Security Research Division of Network Associates, Inc.\& under
100DARPA/SPAWAR contract N66001-01-C-8035
101.Pq Dq CBOSS ,
102as part of the DARPA CHATS research program.
103