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openpam_restore_cred.c (302408) openpam_restore_cred.c (94209)
1/*-
1/*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 Dag-Erling Sm��rgrav
2 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by ThinkSec AS and
3 * All rights reserved.
4 *
5 * 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.
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.
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

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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 *
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

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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 *
35 * $Id: openpam_restore_cred.c 648 2013-03-05 17:54:27Z des $
34 * $P4: //depot/projects/openpam/lib/openpam_restore_cred.c#1 $
36 */
37
35 */
36
38#ifdef HAVE_CONFIG_H
39# include "config.h"
40#endif
41
42#include <sys/param.h>
43
37#include <sys/param.h>
38
44#include <grp.h>
45#include <limits.h>
46#include <pwd.h>
47#include <stdlib.h>
48#include <unistd.h>
49
50#include <security/pam_appl.h>
51
52#include "openpam_impl.h"
39#include <pwd.h>
40#include <stdlib.h>
41#include <unistd.h>
42
43#include <security/pam_appl.h>
44
45#include "openpam_impl.h"
53#include "openpam_cred.h"
54
55/*
56 * OpenPAM extension
57 *
58 * Restore credentials
59 */
60
61int
62openpam_restore_cred(pam_handle_t *pamh)
63{
46
47/*
48 * OpenPAM extension
49 *
50 * Restore credentials
51 */
52
53int
54openpam_restore_cred(pam_handle_t *pamh)
55{
64 const struct pam_saved_cred *scred;
65 const void *scredp;
56 struct pam_saved_cred *scred;
66 int r;
67
57 int r;
58
68 ENTER();
69 r = pam_get_data(pamh, PAM_SAVED_CRED, &scredp);
59 r = pam_get_data(pamh, PAM_SAVED_CRED, (const void **)&scred);
70 if (r != PAM_SUCCESS)
60 if (r != PAM_SUCCESS)
71 RETURNC(r);
72 if (scredp == NULL)
73 RETURNC(PAM_SYSTEM_ERR);
74 scred = scredp;
75 if (scred->euid != geteuid()) {
76 if (seteuid(scred->euid) < 0 ||
77 setgroups(scred->ngroups, scred->groups) < 0 ||
78 setegid(scred->egid) < 0)
79 RETURNC(PAM_SYSTEM_ERR);
80 }
61 return (r);
62 if (scred == NULL)
63 return (PAM_SYSTEM_ERR);
64 if (seteuid(scred->euid) == -1 ||
65 setgroups(scred->ngroups, scred->groups) == -1 ||
66 setegid(scred->egid) == -1)
67 return (PAM_SYSTEM_ERR);
81 pam_set_data(pamh, PAM_SAVED_CRED, NULL, NULL);
68 pam_set_data(pamh, PAM_SAVED_CRED, NULL, NULL);
82 RETURNC(PAM_SUCCESS);
69 return (PAM_SUCCESS);
83}
84
85/*
86 * Error codes:
87 *
88 * =pam_get_data
89 * PAM_SYSTEM_ERR
90 */
91
92/**
93 * The =openpam_restore_cred function restores the credentials saved by
94 * =openpam_borrow_cred.
95 *
70}
71
72/*
73 * Error codes:
74 *
75 * =pam_get_data
76 * PAM_SYSTEM_ERR
77 */
78
79/**
80 * The =openpam_restore_cred function restores the credentials saved by
81 * =openpam_borrow_cred.
82 *
96 * >setegid 2
97 * >seteuid 2
98 * >setgroups 2
83 * >setegid
84 * >seteuid
85 * >setgroups
99 */
86 */