1/* 2 * Copyright (c) 2007 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/*- 29 * Copyright (c) 2003-2005 Networks Associates Technology, Inc. 30 * All rights reserved. 31 * 32 * This software was developed for the FreeBSD Project in part by Network 33 * Associates Laboratories, the Security Research Division of Network 34 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 35 * as part of the DARPA CHATS research program. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 */ 58 59#include <sys/cdefs.h> 60 61#include <sys/param.h> 62#include <sys/kernel.h> 63#include <sys/lock.h> 64#include <sys/malloc.h> 65#include <sys/sbuf.h> 66#include <sys/systm.h> 67#include <sys/sysctl.h> 68#include <security/mac_internal.h> 69#include <sys/posix_sem.h> 70 71 72static struct label * 73mac_posixsem_label_alloc(void) 74{ 75 struct label *label; 76 77 label = mac_labelzone_alloc(MAC_WAITOK); 78 if (label == NULL) 79 return (NULL); 80 MAC_PERFORM(posixsem_label_init, label); 81 return (label); 82} 83 84void 85mac_posixsem_label_init(struct pseminfo *psem) 86{ 87 88 psem->psem_label = mac_posixsem_label_alloc(); 89} 90 91static void 92mac_posixsem_label_free(struct label *label) 93{ 94 95 MAC_PERFORM(posixsem_label_destroy, label); 96 mac_labelzone_free(label); 97} 98 99void 100mac_posixsem_label_destroy(struct pseminfo *psem) 101{ 102 103 mac_posixsem_label_free(psem->psem_label); 104 psem->psem_label = NULL; 105} 106 107void 108mac_posixsem_label_associate(kauth_cred_t cred, struct pseminfo *psem, 109 const char *name) 110{ 111 112 MAC_PERFORM(posixsem_label_associate, cred, psem, psem->psem_label, name); 113} 114 115 116void 117mac_posixsem_vnode_label_associate(kauth_cred_t cred, 118 struct pseminfo *psem, struct label *plabel, 119 vnode_t vp, struct label *vlabel) 120{ 121 MAC_PERFORM(vnode_label_associate_posixsem, cred, 122 psem, plabel, vp, vlabel); 123} 124 125int 126mac_posixsem_check_create(kauth_cred_t cred, const char *name) 127{ 128 int error; 129 130 if (!mac_posixsem_enforce) 131 return (0); 132 133 MAC_CHECK(posixsem_check_create, cred, name); 134 135 return (error); 136} 137 138int 139mac_posixsem_check_open(kauth_cred_t cred, struct pseminfo *psem) 140{ 141 int error; 142 143 if (!mac_posixsem_enforce) 144 return (0); 145 146 MAC_CHECK(posixsem_check_open, cred, psem, 147 psem->psem_label); 148 149 return (error); 150} 151 152int 153mac_posixsem_check_post(kauth_cred_t cred, struct pseminfo *psem) 154{ 155 int error; 156 157 if (!mac_posixsem_enforce) 158 return (0); 159 160 MAC_CHECK(posixsem_check_post, cred, psem, psem->psem_label); 161 162 return (error); 163} 164 165int 166mac_posixsem_check_unlink(kauth_cred_t cred, struct pseminfo *psem, 167 const char *name) 168{ 169 int error; 170 171 if (!mac_posixsem_enforce) 172 return (0); 173 174 MAC_CHECK(posixsem_check_unlink, cred, psem, psem->psem_label, name); 175 176 return (error); 177} 178 179int 180mac_posixsem_check_wait(kauth_cred_t cred, struct pseminfo *psem) 181{ 182 int error; 183 184 if (!mac_posixsem_enforce) 185 return (0); 186 187 MAC_CHECK(posixsem_check_wait, cred, psem, psem->psem_label); 188 189 return (error); 190} 191