contrib/openpam/lib/openpam_nullconv.c

   1 /*-
   2  * Copyright (c) 2002-2003 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  * $Id: openpam_nullconv.c 408 2007-12-21 11:36:24Z des $
  36  */
  37
  38 #include <sys/types.h>
  39
  40 #include <security/pam_appl.h>
  41
  42 #include "openpam_impl.h"
  43
  44 /*
  45  * OpenPAM extension
  46  *
  47  * Null conversation function
  48  */
  49
  50 int
  51 openpam_nullconv(int n,
  52          const struct pam_message **msg,
  53          struct pam_response **resp,
  54          void *data)
  55 {
  56
  57         ENTER();
  58         (void)n;
  59         (void)msg;
  60         (void)resp;
  61         (void)data;
  62         RETURNC(PAM_CONV_ERR);
  63 }
  64
  65 /*
  66  * Error codes:
  67  *
  68  *      PAM_CONV_ERR
  69  */
  70
  71 /**
  72  * The =openpam_nullconv function is a null conversation function suitable
  73  * for applications that want to use PAM but don't support interactive
  74  * dialog with the user.
  75  * Such applications should set =PAM_AUTHTOK to whatever authentication
  76  * token they've obtained on their own before calling =pam_authenticate
  77  * and / or =pam_chauthtok, and their PAM configuration should specify the
  78  * ;use_first_pass option for all modules that require access to the
  79  * authentication token, to make sure they use =PAM_AUTHTOK rather than
  80  * try to query the user.
  81  *
  82  * >openpam_ttyconv
  83  * >pam_prompt
  84  * >pam_set_item
  85  * >pam_vprompt
  86  */