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  * $OpenPAM: pam_set_item.c 938 2017-04-30 21:34:42Z des $
36  */
37 
38 #ifdef HAVE_CONFIG_H
39 # include "config.h"
40 #endif
41 
42 #include <sys/param.h>
43 
44 #include <stdlib.h>
45 #include <string.h>
46 
47 #include <security/pam_appl.h>
48 
49 #include "openpam_impl.h"
50 
51 /*
52  * XSSO 4.2.1
53  * XSSO 6 page 60
54  *
55  * Set authentication information
56  */
57 
58 int
59 pam_set_item(pam_handle_t *pamh,
60 	int item_type,
61 	const void *item)
62 {
63 	void **slot;
64 	size_t nsize, osize;
65 
66 	ENTERI(item_type);
67 	slot = &pamh->item[item_type];
68 	osize = nsize = 0;
69 	switch (item_type) {
70 	case PAM_SERVICE:
71 		/* set once only, by pam_start() */
72 		if (*slot != NULL && item != NULL)
73 			RETURNC(PAM_BAD_ITEM);
74 		/* fall through */
75 	case PAM_USER:
76 	case PAM_AUTHTOK:
77 	case PAM_OLDAUTHTOK:
78 	case PAM_TTY:
79 	case PAM_RHOST:
80 	case PAM_RUSER:
81 	case PAM_USER_PROMPT:
82 	case PAM_AUTHTOK_PROMPT:
83 	case PAM_OLDAUTHTOK_PROMPT:
84 	case PAM_HOST:
85 		if (*slot != NULL)
86 			osize = strlen(*slot) + 1;
87 		if (item != NULL)
88 			nsize = strlen(item) + 1;
89 		break;
90 	case PAM_REPOSITORY:
91 		osize = nsize = sizeof(struct pam_repository);
92 		break;
93 	case PAM_CONV:
94 		osize = nsize = sizeof(struct pam_conv);
95 		break;
96 	default:
97 		RETURNC(PAM_BAD_ITEM);
98 	}
99 	if (*slot != NULL) {
100 		memset(*slot, 0xd0, osize);
101 		FREE(*slot);
102 	}
103 	if (item != NULL) {
104 		if ((*slot = malloc(nsize)) == NULL)
105 			RETURNC(PAM_BUF_ERR);
106 		memcpy(*slot, item, nsize);
107 	} else {
108 		*slot = NULL;
109 	}
110 	RETURNC(PAM_SUCCESS);
111 }
112 
113 /*
114  * Error codes:
115  *
116  *	PAM_BAD_ITEM
117  *	PAM_BUF_ERR
118  */
119 
120 /**
121  * The =pam_set_item function sets the item specified by the =item_type
122  * argument to a copy of the object pointed to by the =item argument.
123  * The item is stored in the PAM context specified by the =pamh argument.
124  * See =pam_get_item for a list of recognized item types.
125  */
126