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