source: openpam/trunk/lib/openpam_get_option.c @ 437

Last change on this file since 437 was 437, checked in by Dag-Erling Smørgrav, 9 years ago

Update copyright and release notes.

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1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 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_get_option.c 437 2011-09-13 12:00:13Z des $
36 */
37
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <sys/param.h>
43
44#include <string.h>
45
46#include <security/pam_appl.h>
47#include <security/openpam.h>
48
49#include "openpam_impl.h"
50
51/*
52 * OpenPAM extension
53 *
54 * Returns the value of a module option
55 */
56
57const char *
58openpam_get_option(pam_handle_t *pamh,
59        const char *option)
60{
61        pam_chain_t *cur;
62        size_t len;
63        int i;
64
65        ENTERS(option);
66        if (pamh == NULL || pamh->current == NULL || option == NULL)
67                RETURNS(NULL);
68        cur = pamh->current;
69        len = strlen(option);
70        for (i = 0; i < cur->optc; ++i) {
71                if (strncmp(cur->optv[i], option, len) == 0) {
72                        if (cur->optv[i][len] == '\0')
73                                RETURNS(&cur->optv[i][len]);
74                        else if (cur->optv[i][len] == '=')
75                                RETURNS(&cur->optv[i][len + 1]);
76                }
77        }
78        RETURNS(NULL);
79}
80
81/**
82 * The =openpam_get_option function returns the value of the specified
83 * option in the context of the currently executing service module, or
84 * =NULL if the option is not set or no module is currently executing.
85 *
86 * >openpam_set_option
87 */
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