1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
35 __FBSDID("$FreeBSD$");
36
37 #include <sys/types.h>
38 #include "namespace.h"
39 #include <sys/acl.h>
40 #include "un-namespace.h"
41 #include <sys/errno.h>
42 #include <stdlib.h>
43
44 #include "acl_support.h"
45
46 /*
47 * acl_valid: accepts an ACL, returns 0 on valid ACL, -1 for invalid,
48 * and errno set to EINVAL.
49 *
50 * Implemented by calling the acl_check routine in acl_support, which
51 * requires ordering. We call acl_support's _posix1e_acl_sort to make this
52 * true. POSIX.1e allows acl_valid() to reorder the ACL as it sees fit.
53 *
54 * This call is deprecated, as it doesn't ask whether the ACL is valid
55 * for a particular target. However, this call is standardized, unlike
56 * the other two forms.
57 */
58 int
acl_valid(acl_t acl)59 acl_valid(acl_t acl)
60 {
61 int error;
62
63 if (acl == NULL) {
64 errno = EINVAL;
65 return (-1);
66 }
67 if (!_acl_brand_may_be(acl, ACL_BRAND_POSIX)) {
68 errno = EINVAL;
69 return (-1);
70 }
71 _posix1e_acl_sort(acl);
72 error = _posix1e_acl_check(acl);
73 if (error) {
74 errno = error;
75 return (-1);
76 } else {
77 return (0);
78 }
79 }
80
81 int
acl_valid_file_np(const char * pathp,acl_type_t type,acl_t acl)82 acl_valid_file_np(const char *pathp, acl_type_t type, acl_t acl)
83 {
84
85 if (pathp == NULL || acl == NULL) {
86 errno = EINVAL;
87 return (-1);
88 }
89 type = _acl_type_unold(type);
90 if (_posix1e_acl(acl, type))
91 _posix1e_acl_sort(acl);
92
93 return (__acl_aclcheck_file(pathp, type, &acl->ats_acl));
94 }
95
96 int
acl_valid_link_np(const char * pathp,acl_type_t type,acl_t acl)97 acl_valid_link_np(const char *pathp, acl_type_t type, acl_t acl)
98 {
99
100 if (pathp == NULL || acl == NULL) {
101 errno = EINVAL;
102 return (-1);
103 }
104 type = _acl_type_unold(type);
105 if (_posix1e_acl(acl, type))
106 _posix1e_acl_sort(acl);
107
108 return (__acl_aclcheck_link(pathp, type, &acl->ats_acl));
109 }
110
111 int
acl_valid_fd_np(int fd,acl_type_t type,acl_t acl)112 acl_valid_fd_np(int fd, acl_type_t type, acl_t acl)
113 {
114
115 if (acl == NULL) {
116 errno = EINVAL;
117 return (-1);
118 }
119 type = _acl_type_unold(type);
120 if (_posix1e_acl(acl, type))
121 _posix1e_acl_sort(acl);
122
123 acl->ats_cur_entry = 0;
124
125 return (___acl_aclcheck_fd(fd, type, &acl->ats_acl));
126 }
127