1/*-
2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * This software was developed by Robert Watson for the TrustedBSD Project.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28/*
29 * acl_valid -- POSIX.1e ACL check routine
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: head/lib/libc/posix1e/acl_valid.c 194955 2009-06-25 12:46:59Z trasz $");
34
35#include <sys/types.h>
36#include "namespace.h"
37#include <sys/acl.h>
38#include "un-namespace.h"
39#include <sys/errno.h>
40#include <stdlib.h>
41
42#include "acl_support.h"
43
44/*
45 * acl_valid: accepts an ACL, returns 0 on valid ACL, -1 for invalid,
46 * and errno set to EINVAL.
47 *
48 * Implemented by calling the acl_check routine in acl_support, which
49 * requires ordering. We call acl_support's _posix1e_acl_sort to make this
50 * true. POSIX.1e allows acl_valid() to reorder the ACL as it sees fit.
51 *
52 * This call is deprecated, as it doesn't ask whether the ACL is valid
53 * for a particular target. However, this call is standardized, unlike
54 * the other two forms.
55 */
56int
57acl_valid(acl_t acl)
58{
59 int error;
60
61 if (acl == NULL) {
62 errno = EINVAL;
63 return (-1);
64 }
65 if (!_acl_brand_may_be(acl, ACL_BRAND_POSIX)) {
66 errno = EINVAL;
67 return (-1);
68 }
69 _posix1e_acl_sort(acl);
70 error = _posix1e_acl_check(acl);
71 if (error) {
72 errno = error;
73 return (-1);
74 } else {
75 return (0);
76 }
77}
78
79int
80acl_valid_file_np(const char *pathp, acl_type_t type, acl_t acl)
81{
82 int error;
83
84 if (pathp == NULL || acl == NULL) {
85 errno = EINVAL;
86 return (-1);
87 }
88 type = _acl_type_unold(type);
89 if (_posix1e_acl(acl, type)) {
90 error = _posix1e_acl_sort(acl);
91 if (error) {
92 errno = error;
93 return (-1);
94 }
95 }
96
97 return (__acl_aclcheck_file(pathp, type, &acl->ats_acl));
98}
99
100int
101acl_valid_link_np(const char *pathp, acl_type_t type, acl_t acl)
102{
103 int error;
104
105 if (pathp == NULL || acl == NULL) {
106 errno = EINVAL;
107 return (-1);
108 }
109 type = _acl_type_unold(type);
110 if (_posix1e_acl(acl, type)) {
111 error = _posix1e_acl_sort(acl);
112 if (error) {
113 errno = error;
114 return (-1);
115 }
116 }
117
118 return (__acl_aclcheck_link(pathp, type, &acl->ats_acl));
119}
120
121int
122acl_valid_fd_np(int fd, acl_type_t type, acl_t acl)
123{
124 int error;
125
126 if (acl == NULL) {
127 errno = EINVAL;
128 return (-1);
129 }
130 type = _acl_type_unold(type);
131 if (_posix1e_acl(acl, type)) {
132 error = _posix1e_acl_sort(acl);
133 if (error) {
134 errno = error;
135 return (-1);
136 }
137 }
138
139 acl->ats_cur_entry = 0;
140
141 return (___acl_aclcheck_fd(fd, type, &acl->ats_acl));
142}