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      1 /*	$NetBSD: openpam_nullconv.c,v 1.4 2023/06/30 21:46:20 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
      5  * Copyright (c) 2004-2011 Dag-Erling Smrgrav
      6  * All rights reserved.
      7  *
      8  * This software was developed for the FreeBSD Project by ThinkSec AS and
      9  * Network Associates Laboratories, the Security Research Division of
     10  * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
     11  * ("CBOSS"), as part of the DARPA CHATS research program.
     12  *
     13  * Redistribution and use in source and binary forms, with or without
     14  * modification, are permitted provided that the following conditions
     15  * are met:
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. The name of the author may not be used to endorse or promote
     22  *    products derived from this software without specific prior written
     23  *    permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  */
     37 
     38 #ifdef HAVE_CONFIG_H
     39 # include "config.h"
     40 #endif
     41 
     42 #include <sys/cdefs.h>
     43 __RCSID("$NetBSD: openpam_nullconv.c,v 1.4 2023/06/30 21:46:20 christos Exp $");
     44 
     45 #include <sys/types.h>
     46 
     47 #include <security/pam_appl.h>
     48 
     49 #include "openpam_impl.h"
     50 
     51 /*
     52  * OpenPAM extension
     53  *
     54  * Null conversation function
     55  */
     56 
     57 int
     58 openpam_nullconv(int n,
     59 	 const struct pam_message **msg,
     60 	 struct pam_response **resp,
     61 	 void *data)
     62 {
     63 
     64 	ENTER();
     65 	/*LINTED unused*/
     66 	(void)n;
     67 	/*LINTED unused*/
     68 	(void)msg;
     69 	/*LINTED unused*/
     70 	(void)resp;
     71 	/*LINTED unused*/
     72 	(void)data;
     73 	RETURNC(PAM_CONV_ERR);
     74 }
     75 
     76 /*
     77  * Error codes:
     78  *
     79  *	PAM_CONV_ERR
     80  */
     81 
     82 /**
     83  * The =openpam_nullconv function is a null conversation function suitable
     84  * for applications that want to use PAM but don't support interactive
     85  * dialog with the user.
     86  * Such applications should set =PAM_AUTHTOK to whatever authentication
     87  * token they've obtained on their own before calling =pam_authenticate
     88  * and / or =pam_chauthtok, and their PAM configuration should specify the
     89  * ;use_first_pass option for all modules that require access to the
     90  * authentication token, to make sure they use =PAM_AUTHTOK rather than
     91  * try to query the user.
     92  *
     93  * >openpam_ttyconv
     94  * >pam_prompt
     95  * >pam_set_item
     96  * >pam_vprompt
     97  */
     98