pam_set_item.c revision 228690 
1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 Dag-Erling Sm��rgrav
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 * $Id: pam_set_item.c 496 2011-11-21 16:20:45Z 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
58int
59pam_set_item(pam_handle_t *pamh,
60	int item_type,
61	const void *item)
62{
63	void **slot, *tmp;
64	size_t nsize, osize;
65
66	ENTERI(item_type);
67	if (pamh == NULL)
68		RETURNC(PAM_SYSTEM_ERR);
69	slot = &pamh->item[item_type];
70	osize = nsize = 0;
71	switch (item_type) {
72	case PAM_SERVICE:
73		/* set once only, by pam_start() */
74		if (*slot != NULL)
75			RETURNC(PAM_SYSTEM_ERR);
76		/* fall through */
77	case PAM_USER:
78	case PAM_AUTHTOK:
79	case PAM_OLDAUTHTOK:
80	case PAM_TTY:
81	case PAM_RHOST:
82	case PAM_RUSER:
83	case PAM_USER_PROMPT:
84	case PAM_AUTHTOK_PROMPT:
85	case PAM_OLDAUTHTOK_PROMPT:
86	case PAM_HOST:
87		if (*slot != NULL)
88			osize = strlen(*slot) + 1;
89		if (item != NULL)
90			nsize = strlen(item) + 1;
91		break;
92	case PAM_REPOSITORY:
93		osize = nsize = sizeof(struct pam_repository);
94		break;
95	case PAM_CONV:
96		osize = nsize = sizeof(struct pam_conv);
97		break;
98	default:
99		RETURNC(PAM_SYMBOL_ERR);
100	}
101	if (*slot != NULL) {
102		memset(*slot, 0xd0, osize);
103		FREE(*slot);
104	}
105	if (item != NULL) {
106		if ((tmp = malloc(nsize)) == NULL)
107			RETURNC(PAM_BUF_ERR);
108		memcpy(tmp, item, nsize);
109	} else {
110		tmp = NULL;
111	}
112	*slot = tmp;
113	RETURNC(PAM_SUCCESS);
114}
115
116/*
117 * Error codes:
118 *
119 *	PAM_SYMBOL_ERR
120 *	PAM_SYSTEM_ERR
121 *	PAM_BUF_ERR
122 */
123
124/**
125 * The =pam_set_item function sets the item specified by the =item_type
126 * argument to a copy of the object pointed to by the =item argument.
127 * The item is stored in the PAM context specified by the =pamh argument.
128 * See =pam_get_item for a list of recognized item types.
129 */
130