1 /* $NetBSD: pam_set_item.c,v 1.5 2023/06/30 21:46:21 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
5 * Copyright (c) 2004-2017 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: pam_set_item.c,v 1.5 2023/06/30 21:46:21 christos Exp $");
44
45 #include <sys/param.h>
46 #include <sys/socket.h>
47
48 #include <stdlib.h>
49 #include <string.h>
50
51 #include <security/pam_appl.h>
52
53 #include "openpam_impl.h"
54
55 /*
56 * XSSO 4.2.1
57 * XSSO 6 page 60
58 *
59 * Set authentication information
60 */
61
62 int
pam_set_item(pam_handle_t * pamh,int item_type,const void * item)63 pam_set_item(pam_handle_t *pamh,
64 int item_type,
65 const void *item)
66 {
67 void **slot;
68 size_t nsize, osize;
69
70 ENTERI(item_type);
71 slot = &pamh->item[item_type];
72 osize = nsize = 0;
73 switch ((enum openpam_item_primitives)item_type) {
74 case PAM_SERVICE:
75 /* set once only, by pam_start() */
76 if (*slot != NULL && item != NULL)
77 RETURNC(PAM_BAD_ITEM);
78 /* FALLTHROUGH */
79 case PAM_USER:
80 case PAM_AUTHTOK:
81 case PAM_OLDAUTHTOK:
82 case PAM_TTY:
83 case PAM_RHOST:
84 case PAM_RUSER:
85 case PAM_USER_PROMPT:
86 case PAM_AUTHTOK_PROMPT:
87 case PAM_OLDAUTHTOK_PROMPT:
88 case PAM_HOST:
89 case PAM_NUSER:
90 if (*slot != NULL)
91 osize = strlen(*slot) + 1;
92 if (item != NULL)
93 nsize = strlen(item) + 1;
94 break;
95 case PAM_REPOSITORY:
96 osize = nsize = sizeof(struct pam_repository);
97 break;
98 case PAM_CONV:
99 osize = nsize = sizeof(struct pam_conv);
100 break;
101 case PAM_SOCKADDR:
102 osize = nsize = sizeof(struct sockaddr_storage);
103 break;
104 default:
105 RETURNC(PAM_BAD_ITEM);
106 }
107 if (*slot != NULL) {
108 memset(*slot, 0xd0, osize);
109 FREE(*slot);
110 }
111 if (item != NULL) {
112 if ((*slot = malloc(nsize)) == NULL)
113 RETURNC(PAM_BUF_ERR);
114 memcpy(*slot, item, nsize);
115 } else {
116 *slot = NULL;
117 }
118 RETURNC(PAM_SUCCESS);
119 }
120
121 /*
122 * Error codes:
123 *
124 * PAM_BAD_ITEM
125 * PAM_BUF_ERR
126 */
127
128 /**
129 * The =pam_set_item function sets the item specified by the =item_type
130 * argument to a copy of the object pointed to by the =item argument.
131 * The item is stored in the PAM context specified by the =pamh argument.
132 * See =pam_get_item for a list of recognized item types.
133 */
134