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/systm.h> 63 #include <sys/kernel.h> 64 #include <sys/lock.h> 65 #include <sys/malloc.h> 66 #include <sys/sbuf.h> 67 #include <sys/systm.h> 68 #include <sys/vnode.h> 69 #include <sys/mount.h> 70 #include <sys/file.h> 71 #include <sys/namei.h> 72 #include <sys/sysctl.h> 73 #include <sys/msg.h> 74 75 #include <security/mac_internal.h> 76 77 void 78 mac_sysvmsg_label_init(struct msg *msgptr) 79 { 80 mac_labelzone_alloc_owned(&msgptr->label, MAC_WAITOK, ^(struct label *label) { 81 MAC_PERFORM(sysvmsg_label_init, label); 82 }); 83 } 84 85 struct label * 86 mac_sysvmsg_label(struct msg *msgptr) 87 { 88 return mac_label_verify(&msgptr->label); 89 } 90 91 void 92 mac_sysvmsq_label_init(struct msqid_kernel *msqptr) 93 { 94 mac_labelzone_alloc_owned(&msqptr->label, MAC_WAITOK, ^(struct label *label) { 95 MAC_PERFORM(sysvmsq_label_init, label); 96 }); 97 } 98 99 struct label * 100 mac_sysvmsq_label(struct msqid_kernel *msqptr) 101 { 102 return mac_label_verify(&msqptr->label); 103 } 104 105 void 106 mac_sysvmsg_label_associate(kauth_cred_t cred, struct msqid_kernel *msqptr, 107 struct msg *msgptr) 108 { 109 MAC_PERFORM(sysvmsg_label_associate, cred, msqptr, mac_sysvmsq_label(msqptr), 110 msgptr, mac_sysvmsg_label(msgptr)); 111 } 112 113 void 114 mac_sysvmsq_label_associate(kauth_cred_t cred, struct msqid_kernel *msqptr) 115 { 116 MAC_PERFORM(sysvmsq_label_associate, cred, msqptr, mac_sysvmsq_label(msqptr)); 117 } 118 119 void 120 mac_sysvmsg_label_recycle(struct msg *msgptr) 121 { 122 MAC_PERFORM(sysvmsg_label_recycle, mac_sysvmsg_label(msgptr)); 123 } 124 125 void 126 mac_sysvmsq_label_recycle(struct msqid_kernel *msqptr) 127 { 128 MAC_PERFORM(sysvmsq_label_recycle, mac_sysvmsq_label(msqptr)); 129 } 130 131 int 132 mac_sysvmsq_check_enqueue(kauth_cred_t cred, struct msg *msgptr, 133 struct msqid_kernel *msqptr) 134 { 135 int error; 136 137 #if SECURITY_MAC_CHECK_ENFORCE 138 /* 21167099 - only check if we allow write */ 139 if (!mac_sysvmsg_enforce) { 140 return 0; 141 } 142 #endif 143 144 MAC_CHECK(sysvmsq_check_enqueue, cred, msgptr, mac_sysvmsg_label(msgptr), msqptr, 145 mac_sysvmsq_label(msqptr)); 146 147 return error; 148 } 149 150 int 151 mac_sysvmsq_check_msgrcv(kauth_cred_t cred, struct msg *msgptr) 152 { 153 int error; 154 155 #if SECURITY_MAC_CHECK_ENFORCE 156 /* 21167099 - only check if we allow write */ 157 if (!mac_sysvmsg_enforce) { 158 return 0; 159 } 160 #endif 161 162 MAC_CHECK(sysvmsq_check_msgrcv, cred, msgptr, mac_sysvmsg_label(msgptr)); 163 164 return error; 165 } 166 167 int 168 mac_sysvmsq_check_msgrmid(kauth_cred_t cred, struct msg *msgptr) 169 { 170 int error; 171 172 #if SECURITY_MAC_CHECK_ENFORCE 173 /* 21167099 - only check if we allow write */ 174 if (!mac_sysvmsg_enforce) { 175 return 0; 176 } 177 #endif 178 179 MAC_CHECK(sysvmsq_check_msgrmid, cred, msgptr, mac_sysvmsg_label(msgptr)); 180 181 return error; 182 } 183 184 int 185 mac_sysvmsq_check_msqget(kauth_cred_t cred, struct msqid_kernel *msqptr) 186 { 187 int error; 188 189 #if SECURITY_MAC_CHECK_ENFORCE 190 /* 21167099 - only check if we allow write */ 191 if (!mac_sysvmsg_enforce) { 192 return 0; 193 } 194 #endif 195 196 MAC_CHECK(sysvmsq_check_msqget, cred, msqptr, mac_sysvmsq_label(msqptr)); 197 198 return error; 199 } 200 201 int 202 mac_sysvmsq_check_msqsnd(kauth_cred_t cred, struct msqid_kernel *msqptr) 203 { 204 int error; 205 206 #if SECURITY_MAC_CHECK_ENFORCE 207 /* 21167099 - only check if we allow write */ 208 if (!mac_sysvmsg_enforce) { 209 return 0; 210 } 211 #endif 212 213 MAC_CHECK(sysvmsq_check_msqsnd, cred, msqptr, mac_sysvmsq_label(msqptr)); 214 215 return error; 216 } 217 218 int 219 mac_sysvmsq_check_msqrcv(kauth_cred_t cred, struct msqid_kernel *msqptr) 220 { 221 int error; 222 223 #if SECURITY_MAC_CHECK_ENFORCE 224 /* 21167099 - only check if we allow write */ 225 if (!mac_sysvmsg_enforce) { 226 return 0; 227 } 228 #endif 229 230 MAC_CHECK(sysvmsq_check_msqrcv, cred, msqptr, mac_sysvmsq_label(msqptr)); 231 232 return error; 233 } 234 235 int 236 mac_sysvmsq_check_msqctl(kauth_cred_t cred, struct msqid_kernel *msqptr, 237 int cmd) 238 { 239 int error; 240 241 #if SECURITY_MAC_CHECK_ENFORCE 242 /* 21167099 - only check if we allow write */ 243 if (!mac_sysvmsg_enforce) { 244 return 0; 245 } 246 #endif 247 248 MAC_CHECK(sysvmsq_check_msqctl, cred, msqptr, mac_sysvmsq_label(msqptr), cmd); 249 250 return error; 251 } 252