1.\"- 2.\" Copyright (c) 2002 Networks Associates Technology, Inc. 3.\" All rights reserved. 4.\" 5.\" This software was developed for the FreeBSD Project by ThinkSec AS and 6.\" NAI Labs, the Security Research Division of Network Associates, Inc. 7.\" under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 8.\" 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: //depot/projects/openpam/doc/man/openpam_nullconv.3#2 $ 35.\" 36.Dd May 24, 2002 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 security/pam_appl.h 46.In security/openpam.h 47.Ft int 48.Fn openpam_nullconv "int n" "const struct pam_message **msg" "struct pam_response **resp" "void *data" 49.Sh DESCRIPTION 50The 51.Nm 52function is a null conversation function suitable 53for applications that want to use PAM but don't support interactive 54dialog with the user. Such applications should set 55.Dv PAM_AUTHTOK 56to 57whatever authentication token they've obtained on their own before 58calling 59.Xr pam_authenticate 3 60and / or 61.Xr pam_chauthtok 3 , 62and their PAM 63configuration should specify the 64.Dv use_first_pass 65option for all modules 66that require access to the authentication token, to make sure they use 67.Dv PAM_AUTHTOK 68rather than try to query the user. 69.Pp 70.Sh RETURN VALUES 71The 72.Nm 73function returns one of the following values: 74.Bl -tag -width 18n 75.It Bq Er PAM_CONV_ERR 76Conversation failure. 77.El 78.Sh SEE ALSO 79.Xr openpam_ttyconv 3 , 80.Xr pam 3 , 81.Xr pam_chauthtok 3 , 82.Xr pam_prompt 3 , 83.Xr pam_set_item 3 , 84.Xr pam_strerror 3 , 85.Xr pam_vprompt 3 86.Sh STANDARDS 87The 88.Nm 89function is an OpenPAM extension. 90.Sh AUTHORS 91The 92.Nm 93function and this manual page were developed for the FreeBSD Project 94by ThinkSec AS and NAI Labs, the Security Research Division of Network 95Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 96.Pq Dq CBOSS , 97as part of the DARPA CHATS research program. 98