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 #if 0
36 __FBSDID("$FreeBSD: head/lib/libc/posix1e/acl_valid.c 326193 2017-11-25 17:12:48Z pfg $");
37 #else
38 __RCSID("$NetBSD: acl_valid.c,v 1.1 2020/05/16 18:31:47 christos Exp $");
39 #endif
40
41 #include "namespace.h"
42 #include <sys/types.h>
43 #include <sys/acl.h>
44 #include <errno.h>
45 #include <stdlib.h>
46
47 #include "acl_support.h"
48
49 /*
50 * acl_valid: accepts an ACL, returns 0 on valid ACL, -1 for invalid,
51 * and errno set to EINVAL.
52 *
53 * Implemented by calling the acl_check routine in acl_support, which
54 * requires ordering. We call acl_support's _posix1e_acl_sort to make this
55 * true. POSIX.1e allows acl_valid() to reorder the ACL as it sees fit.
56 *
57 * This call is deprecated, as it doesn't ask whether the ACL is valid
58 * for a particular target. However, this call is standardized, unlike
59 * the other two forms.
60 */
61 int
acl_valid(acl_t acl)62 acl_valid(acl_t acl)
63 {
64 int error;
65
66 if (acl == NULL) {
67 errno = EINVAL;
68 return (-1);
69 }
70 if (!_acl_brand_may_be(acl, ACL_BRAND_POSIX)) {
71 errno = EINVAL;
72 return (-1);
73 }
74 _posix1e_acl_sort(acl);
75 error = _posix1e_acl_check(acl);
76 if (error) {
77 errno = error;
78 return (-1);
79 } else {
80 return (0);
81 }
82 }
83
84 int
acl_valid_file_np(const char * pathp,acl_type_t type,acl_t acl)85 acl_valid_file_np(const char *pathp, acl_type_t type, acl_t acl)
86 {
87
88 if (pathp == NULL || acl == NULL) {
89 errno = EINVAL;
90 return (-1);
91 }
92 type = _acl_type_unold(type);
93 if (_posix1e_acl(acl, type))
94 _posix1e_acl_sort(acl);
95
96 return (__acl_aclcheck_file(pathp, type, &acl->ats_acl));
97 }
98
99 int
acl_valid_link_np(const char * pathp,acl_type_t type,acl_t acl)100 acl_valid_link_np(const char *pathp, acl_type_t type, acl_t acl)
101 {
102
103 if (pathp == NULL || acl == NULL) {
104 errno = EINVAL;
105 return (-1);
106 }
107 type = _acl_type_unold(type);
108 if (_posix1e_acl(acl, type))
109 _posix1e_acl_sort(acl);
110
111 return (__acl_aclcheck_link(pathp, type, &acl->ats_acl));
112 }
113
114 int
acl_valid_fd_np(int fd,acl_type_t type,acl_t acl)115 acl_valid_fd_np(int fd, acl_type_t type, acl_t acl)
116 {
117
118 if (acl == NULL) {
119 errno = EINVAL;
120 return (-1);
121 }
122 type = _acl_type_unold(type);
123 if (_posix1e_acl(acl, type))
124 _posix1e_acl_sort(acl);
125
126 acl->ats_cur_entry = 0;
127
128 return (__acl_aclcheck_fd(fd, type, &acl->ats_acl));
129 }
130