source: openpam/trunk/lib/pam_set_data.c @ 232

Last change on this file since 232 was 232, checked in by Dag-Erling Smørgrav, 14 years ago

With one single exception (where the pointer is obviously being
immediately overwritten), replace all use of free(3) with a macro
that clears the pointer after freeing the memory it pointed to.

Suggested by: Dmitry V. Levin <ldv@…>

File size: 3.3 KB
Line 
1/*-
2 * Copyright (c) 2002,2003 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
6 * Network Associates Laboratories, the Security Research Division of
7 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
8 * ("CBOSS"), as part of the DARPA CHATS research program.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote
19 *    products derived from this software without specific prior written
20 *    permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $P4: //depot/projects/openpam/lib/pam_set_data.c#14 $
35 */
36
37#include <stdlib.h>
38#include <string.h>
39
40#include <security/pam_appl.h>
41
42#include "openpam_impl.h"
43
44/*
45 * XSSO 4.2.1
46 * XSSO 6 page 59
47 *
48 * Set module information
49 */
50
51int
52pam_set_data(pam_handle_t *pamh,
53        const char *module_data_name,
54        void *data,
55        void (*cleanup)(pam_handle_t *pamh,
56                void *data,
57                int pam_end_status))
58{
59        pam_data_t *dp;
60
61        ENTERS(module_data_name);
62        if (pamh == NULL)
63                RETURNC(PAM_SYSTEM_ERR);
64        for (dp = pamh->module_data; dp != NULL; dp = dp->next) {
65                if (strcmp(dp->name, module_data_name) == 0) {
66                        if (dp->cleanup)
67                                (dp->cleanup)(pamh, dp->data, PAM_SUCCESS);
68                        dp->data = data;
69                        dp->cleanup = cleanup;
70                        RETURNC(PAM_SUCCESS);
71                }
72        }
73        if ((dp = malloc(sizeof *dp)) == NULL)
74                RETURNC(PAM_BUF_ERR);
75        if ((dp->name = strdup(module_data_name)) == NULL) {
76                FREE(dp);
77                RETURNC(PAM_BUF_ERR);
78        }
79        dp->data = data;
80        dp->cleanup = cleanup;
81        dp->next = pamh->module_data;
82        pamh->module_data = dp;
83        RETURNC(PAM_SUCCESS);
84}
85
86/*
87 * Error codes:
88 *
89 *      PAM_SYSTEM_ERR
90 *      PAM_BUF_ERR
91 */
92
93/**
94 * The =pam_set_data function associates a pointer to an opaque object
95 * with an arbitrary string specified by the =module_data_name argument,
96 * in the PAM context specified by the =pamh argument.
97 *
98 * If not =NULL, the =cleanup argument should point to a function
99 * responsible for releasing the resources associated with the object.
100 *
101 * This function and its counterpart =pam_get_data are useful for managing
102 * data that are meaningful only to a particular service module.
103 */
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