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      1 /*	$NetBSD: pam_chauthtok.c,v 1.4 2023/06/30 21:46:21 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
      5  * Copyright (c) 2004-2017 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: pam_chauthtok.c,v 1.4 2023/06/30 21:46:21 christos Exp $");
     44 
     45 #include <sys/param.h>
     46 
     47 #include <security/pam_appl.h>
     48 
     49 #include "openpam_impl.h"
     50 
     51 /*
     52  * XSSO 4.2.1
     53  * XSSO 6 page 38
     54  *
     55  * Perform password related functions within the PAM framework
     56  */
     57 
     58 int
     59 pam_chauthtok(pam_handle_t *pamh,
     60 	int flags)
     61 {
     62 	int r;
     63 
     64 	ENTER();
     65 	if (flags & ~(PAM_SILENT|PAM_CHANGE_EXPIRED_AUTHTOK))
     66 		RETURNC(PAM_BAD_CONSTANT);
     67 	r = openpam_dispatch(pamh, PAM_SM_CHAUTHTOK,
     68 	    flags | PAM_PRELIM_CHECK);
     69 	if (r == PAM_SUCCESS)
     70 		r = openpam_dispatch(pamh, PAM_SM_CHAUTHTOK,
     71 		    flags | PAM_UPDATE_AUTHTOK);
     72 	pam_set_item(pamh, PAM_OLDAUTHTOK, NULL);
     73 	pam_set_item(pamh, PAM_AUTHTOK, NULL);
     74 	RETURNC(r);
     75 }
     76 
     77 /*
     78  * Error codes:
     79  *
     80  *	=openpam_dispatch
     81  *	=pam_sm_chauthtok
     82  *	!PAM_IGNORE
     83  *	PAM_BAD_CONSTANT
     84  */
     85 
     86 /**
     87  * The =pam_chauthtok function attempts to change the authentication token
     88  * for the user associated with the pam context specified by the =pamh
     89  * argument.
     90  *
     91  * The =flags argument is the binary or of zero or more of the following
     92  * values:
     93  *
     94  *	=PAM_SILENT:
     95  *		Do not emit any messages.
     96  *	=PAM_CHANGE_EXPIRED_AUTHTOK:
     97  *		Change only those authentication tokens that have expired.
     98  *
     99  * If any other bits are set, =pam_chauthtok will return =PAM_BAD_CONSTANT.
    100  */
    101