1/*	$NetBSD: openpam_get_option.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 Sm��rgrav
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_get_option.c,v 1.4 2023/06/30 21:46:20 christos Exp $");
44
45#include <sys/param.h>
46
47#include <string.h>
48
49#include <security/pam_appl.h>
50
51#include "openpam_impl.h"
52
53/*
54 * OpenPAM extension
55 *
56 * Returns the value of a module option
57 */
58
59const char *
60openpam_get_option(pam_handle_t *pamh,
61	const char *option)
62{
63	pam_chain_t *cur;
64	size_t len;
65	int i;
66
67	ENTERS(option);
68	if (pamh == NULL || pamh->current == NULL || option == NULL)
69		RETURNS(NULL);
70	cur = pamh->current;
71	len = strlen(option);
72	for (i = 0; i < cur->optc; ++i) {
73		if (strncmp(cur->optv[i], option, len) == 0) {
74			if (cur->optv[i][len] == '\0')
75				RETURNS(&cur->optv[i][len]);
76			else if (cur->optv[i][len] == '=')
77				RETURNS(&cur->optv[i][len + 1]);
78		}
79	}
80	RETURNS(NULL);
81}
82
83/**
84 * The =openpam_get_option function returns the value of the specified
85 * option in the context of the currently executing service module, or
86 * =NULL if the option is not set or no module is currently executing.
87 *
88 * >openpam_set_option
89 */
90