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 Smørgrav
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
59 const char *
openpam_get_option(pam_handle_t * pamh,const char * option)60 openpam_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