1.\"- 2.\" Copyright (c) 2001-2003 Networks Associates Technology, Inc. 3.\" All rights reserved. 4.\" 5.\" This software was developed for the FreeBSD Project by ThinkSec AS and 6.\" Network Associates Laboratories, the Security Research Division of 7.\" Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 8.\" ("CBOSS"), as part of the DARPA CHATS research program. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 3. The name of the author may not be used to endorse or promote 19.\" products derived from this software without specific prior written 20.\" permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" $P4$ 35.\" 36.Dd June 16, 2005 37.Dt OPENPAM_NULLCONV 3 38.Os 39.Sh NAME 40.Nm openpam_nullconv 41.Nd null conversation function 42.Sh LIBRARY 43.Lb libpam 44.Sh SYNOPSIS 45.In sys/types.h 46.In security/pam_appl.h 47.In security/openpam.h 48.Ft "int" 49.Fn openpam_nullconv "int n" "const struct pam_message **msg" "struct pam_response **resp" "void *data" 50.Sh DESCRIPTION 51The 52.Nm 53function is a null conversation function suitable 54for applications that want to use PAM but don't support interactive 55dialog with the user. 56Such applications should set 57.Dv PAM_AUTHTOK 58to whatever authentication 59token they've obtained on their own before calling 60.Xr pam_authenticate 3 61and / or 62.Xr pam_chauthtok 3 , 63and their PAM configuration should specify the 64.Dv use_first_pass 65option for all modules that require access to the 66authentication token, to make sure they use 67.Dv PAM_AUTHTOK 68rather than 69try to query the user. 70.Pp 71.Sh RETURN VALUES 72The 73.Nm 74function returns one of the following values: 75.Bl -tag -width 18n 76.It Bq Er PAM_CONV_ERR 77Conversation failure. 78.El 79.Sh SEE ALSO 80.Xr openpam_ttyconv 3 , 81.Xr pam 3 , 82.Xr pam_authenticate 3 , 83.Xr pam_chauthtok 3 , 84.Xr pam_prompt 3 , 85.Xr pam_set_item 3 , 86.Xr pam_strerror 3 , 87.Xr pam_vprompt 3 88.Sh STANDARDS 89The 90.Nm 91function is an OpenPAM extension. 92.Sh AUTHORS 93The 94.Nm 95function and this manual page were developed for the 96.Fx 97Project by ThinkSec AS and Network Associates Laboratories, the 98Security Research Division of Network Associates, Inc.\& under 99DARPA/SPAWAR contract N66001-01-C-8035 100.Pq Dq CBOSS , 101as part of the DARPA CHATS research program. 102