1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson for the TrustedBSD Project.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30 /*
31 * acl_valid -- POSIX.1e ACL check routine
32 */
33
34 #include <sys/types.h>
35 #include "namespace.h"
36 #include <sys/acl.h>
37 #include "un-namespace.h"
38 #include <sys/errno.h>
39 #include <stdlib.h>
40
41 #include "acl_support.h"
42
43 /*
44 * acl_valid: accepts an ACL, returns 0 on valid ACL, -1 for invalid,
45 * and errno set to EINVAL.
46 *
47 * Implemented by calling the acl_check routine in acl_support, which
48 * requires ordering. We call acl_support's _posix1e_acl_sort to make this
49 * true. POSIX.1e allows acl_valid() to reorder the ACL as it sees fit.
50 *
51 * This call is deprecated, as it doesn't ask whether the ACL is valid
52 * for a particular target. However, this call is standardized, unlike
53 * the other two forms.
54 */
55 int
acl_valid(acl_t acl)56 acl_valid(acl_t acl)
57 {
58 int error;
59
60 if (acl == NULL) {
61 errno = EINVAL;
62 return (-1);
63 }
64 if (!_acl_brand_may_be(acl, ACL_BRAND_POSIX)) {
65 errno = EINVAL;
66 return (-1);
67 }
68 _posix1e_acl_sort(acl);
69 error = _posix1e_acl_check(acl);
70 if (error) {
71 errno = error;
72 return (-1);
73 } else {
74 return (0);
75 }
76 }
77
78 int
acl_valid_file_np(const char * pathp,acl_type_t type,acl_t acl)79 acl_valid_file_np(const char *pathp, acl_type_t type, acl_t acl)
80 {
81
82 if (pathp == NULL || acl == NULL) {
83 errno = EINVAL;
84 return (-1);
85 }
86 type = _acl_type_unold(type);
87 if (_posix1e_acl(acl, type))
88 _posix1e_acl_sort(acl);
89
90 return (__acl_aclcheck_file(pathp, type, &acl->ats_acl));
91 }
92
93 int
acl_valid_link_np(const char * pathp,acl_type_t type,acl_t acl)94 acl_valid_link_np(const char *pathp, acl_type_t type, acl_t acl)
95 {
96
97 if (pathp == NULL || acl == NULL) {
98 errno = EINVAL;
99 return (-1);
100 }
101 type = _acl_type_unold(type);
102 if (_posix1e_acl(acl, type))
103 _posix1e_acl_sort(acl);
104
105 return (__acl_aclcheck_link(pathp, type, &acl->ats_acl));
106 }
107
108 int
acl_valid_fd_np(int fd,acl_type_t type,acl_t acl)109 acl_valid_fd_np(int fd, acl_type_t type, acl_t acl)
110 {
111
112 if (acl == NULL) {
113 errno = EINVAL;
114 return (-1);
115 }
116 type = _acl_type_unold(type);
117 if (_posix1e_acl(acl, type))
118 _posix1e_acl_sort(acl);
119
120 acl->ats_cur_entry = 0;
121
122 return (___acl_aclcheck_fd(fd, type, &acl->ats_acl));
123 }
124