Home | History | Annotate | Line # | Download | only in posix1e 
      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
     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
     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
    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
    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