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 */
58int
59acl_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
81int
82acl_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
96int
97acl_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
111int
112acl_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