1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2017 Dag-Erling Sm��rgrav
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 * $OpenPAM: pam_chauthtok.c 938 2017-04-30 21:34:42Z des $
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <sys/param.h>
43
44#include <security/pam_appl.h>
45
46#include "openpam_impl.h"
47
48/*
49 * XSSO 4.2.1
50 * XSSO 6 page 38
51 *
52 * Perform password related functions within the PAM framework
53 */
54
55int
56pam_chauthtok(pam_handle_t *pamh,
57	int flags)
58{
59	int r;
60
61	ENTER();
62	if (flags & ~(PAM_SILENT|PAM_CHANGE_EXPIRED_AUTHTOK))
63		RETURNC(PAM_BAD_CONSTANT);
64	r = openpam_dispatch(pamh, PAM_SM_CHAUTHTOK,
65	    flags | PAM_PRELIM_CHECK);
66	if (r == PAM_SUCCESS)
67		r = openpam_dispatch(pamh, PAM_SM_CHAUTHTOK,
68		    flags | PAM_UPDATE_AUTHTOK);
69	pam_set_item(pamh, PAM_OLDAUTHTOK, NULL);
70	pam_set_item(pamh, PAM_AUTHTOK, NULL);
71	RETURNC(r);
72}
73
74/*
75 * Error codes:
76 *
77 *	=openpam_dispatch
78 *	=pam_sm_chauthtok
79 *	!PAM_IGNORE
80 *	PAM_BAD_CONSTANT
81 */
82
83/**
84 * The =pam_chauthtok function attempts to change the authentication token
85 * for the user associated with the pam context specified by the =pamh
86 * argument.
87 *
88 * The =flags argument is the binary or of zero or more of the following
89 * values:
90 *
91 *	=PAM_SILENT:
92 *		Do not emit any messages.
93 *	=PAM_CHANGE_EXPIRED_AUTHTOK:
94 *		Change only those authentication tokens that have expired.
95 *
96 * If any other bits are set, =pam_chauthtok will return =PAM_BAD_CONSTANT.
97 */
98