xref: /freebsd/contrib/openpam/lib/libpam/pam_get_data.c (revision 66fd12cf4896eb08ad8e7a2627537f84ead84dd3)
1 /*-
2  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3  * Copyright (c) 2004-2017 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 
36 #ifdef HAVE_CONFIG_H
37 # include "config.h"
38 #endif
39 
40 #include <string.h>
41 
42 #include <security/pam_appl.h>
43 
44 #include "openpam_impl.h"
45 
46 /*
47  * XSSO 4.2.1
48  * XSSO 6 page 43
49  *
50  * Get module information
51  */
52 
53 int
54 pam_get_data(const pam_handle_t *pamh,
55 	const char *module_data_name,
56 	const void **data)
57 {
58 	pam_data_t *dp;
59 
60 	ENTERS(module_data_name);
61 	for (dp = pamh->module_data; dp != NULL; dp = dp->next) {
62 		if (strcmp(dp->name, module_data_name) == 0) {
63 			*data = (void *)dp->data;
64 			RETURNC(PAM_SUCCESS);
65 		}
66 	}
67 	RETURNC(PAM_NO_MODULE_DATA);
68 }
69 
70 /*
71  * Error codes:
72  *
73  *	PAM_NO_MODULE_DATA
74  */
75 
76 /**
77  * The =pam_get_data function looks up the opaque object associated with
78  * the string specified by the =module_data_name argument, in the PAM
79  * context specified by the =pamh argument.
80  * A pointer to the object is stored in the location pointed to by the
81  * =data argument.
82  * If =pam_get_data fails, the =data argument is untouched.
83  *
84  * This function and its counterpart =pam_set_data are useful for managing
85  * data that are meaningful only to a particular service module.
86  */
87