source: openpam/trunk/lib/pam_set_item.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: 3.4 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_item.c#20 $
35 */
36
37#include <sys/param.h>
38
39#include <stdlib.h>
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 60
49 *
50 * Set authentication information
51 */
52
53int
54pam_set_item(pam_handle_t *pamh,
55        int item_type,
56        const void *item)
57{
58        void **slot, *tmp;
59        size_t nsize, osize;
60
61        ENTERI(item_type);
62        if (pamh == NULL)
63                RETURNC(PAM_SYSTEM_ERR);
64        slot = &pamh->item[item_type];
65        osize = nsize = 0;
66        switch (item_type) {
67        case PAM_SERVICE:
68        case PAM_USER:
69        case PAM_AUTHTOK:
70        case PAM_OLDAUTHTOK:
71        case PAM_TTY:
72        case PAM_RHOST:
73        case PAM_RUSER:
74        case PAM_USER_PROMPT:
75        case PAM_AUTHTOK_PROMPT:
76        case PAM_OLDAUTHTOK_PROMPT:
77                if (*slot != NULL)
78                        osize = strlen(*slot) + 1;
79                if (item != NULL)
80                        nsize = strlen(item) + 1;
81                break;
82        case PAM_REPOSITORY:
83                osize = nsize = sizeof(struct pam_repository);
84                break;
85        case PAM_CONV:
86                osize = nsize = sizeof(struct pam_conv);
87                break;
88        default:
89                RETURNC(PAM_SYMBOL_ERR);
90        }
91        if (*slot != NULL) {
92                memset(*slot, 0xd0, osize);
93                FREE(*slot);
94        }
95        if (item != NULL) {
96                if ((tmp = malloc(nsize)) == NULL)
97                        RETURNC(PAM_BUF_ERR);
98                memcpy(tmp, item, nsize);
99        } else {
100                tmp = NULL;
101        }
102        *slot = tmp;
103        RETURNC(PAM_SUCCESS);
104}
105
106/*
107 * Error codes:
108 *
109 *      PAM_SYMBOL_ERR
110 *      PAM_SYSTEM_ERR
111 *      PAM_BUF_ERR
112 */
113
114/**
115 * The =pam_set_item function sets the item specified by the =item_type
116 * argument to a copy of the object pointed to by the =item argument.
117 * The item is stored in the PAM context specified by the =pamh argument.
118 * See =pam_get_item for a list of recognized item types.
119 */
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