1.\"- 2.\" Copyright (c) 2001-2003 Networks Associates Technology, Inc. 3.\" Copyright (c) 2004-2007 Dag-Erling Smørgrav 4.\" All rights reserved. 5.\" 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. 10.\" 11.\" Redistribution and use in source and binary forms, with or without 12.\" modification, are permitted provided that the following conditions 13.\" are met: 14.\" 1. Redistributions of source code must retain the above copyright 15.\" notice, this list of conditions and the following disclaimer. 16.\" 2. Redistributions in binary form must reproduce the above copyright 17.\" notice, this list of conditions and the following disclaimer in the 18.\" documentation and/or other materials provided with the distribution. 19.\" 3. The name of the author may not be used to endorse or promote 20.\" products derived from this software without specific prior written 21.\" permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 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