source: openpam/trunk/lib/pam_get_authtok.c @ 62

Last change on this file since 62 was 58, checked in by Dag-Erling Smørgrav, 19 years ago

Check *authtok - pam_get_item(3) will succeed even if the item is
NULL.

Sponsored by: DARPA, NAI Labs

  • Property svn:keywords set to Id LastChangedRevision HeadURL LastChangedDate LastChangedBy
File size: 2.6 KB
Line 
1/*-
2 * Copyright (c) 2002 Networks Associates Technologies, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
6 * NAI Labs, the Security Research Division of Network Associates, Inc.
7 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
8 * 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 * $Id: pam_get_authtok.c 58 2002-02-13 02:19:05Z des $
35 */
36
37#include <sys/param.h>
38
39#include <security/pam_appl.h>
40#include <security/openpam.h>
41
42#include "openpam_impl.h"
43
44/*
45 * OpenPAM extension
46 *
47 * Retrieve authentication token
48 */
49
50int
51pam_get_authtok(pam_handle_t *pamh,
52        const char **authtok,
53        const char *prompt)
54{
55        char *p, *resp;
56        int r;
57
58        if (pamh == NULL || authtok == NULL)
59                return (PAM_SYSTEM_ERR);
60
61        r = pam_get_item(pamh, PAM_AUTHTOK, (const void **)authtok);
62        if (r == PAM_SUCCESS && *authtok != NULL)
63                return (PAM_SUCCESS);
64        if (prompt == NULL) {
65                if (pam_get_item(pamh, PAM_AUTHTOK_PROMPT,
66                    (const void **)&p) != PAM_SUCCESS || p == NULL)
67                        prompt = "Password:";
68        }
69        r = pam_prompt(pamh, PAM_PROMPT_ECHO_OFF, &resp,
70            "%s", prompt ? prompt : p);
71        if (r != PAM_SUCCESS)
72                return (r);
73        *authtok = resp;
74        return (pam_set_item(pamh, PAM_AUTHTOK, *authtok));
75}
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