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 Smørgrav 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