pam_set_item.c revision 114438 
1/*-
2 * Copyright (c) 2002 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#18 $
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 */
120