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