security/mac_sysv_msg.c

   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 static struct label *
  78 mac_sysv_msgmsg_label_alloc(void)
  79 {
  80         struct label *label;
  81
  82         label = mac_labelzone_alloc(MAC_WAITOK);
  83         if (label == NULL)
  84                 return (NULL);
  85         MAC_PERFORM(sysvmsg_label_init, label);
  86         return (label);
  87 }
  88
  89 void
  90 mac_sysvmsg_label_init(struct msg *msgptr)
  91 {
  92
  93         msgptr->label = mac_sysv_msgmsg_label_alloc();
  94 }
  95
  96 static struct label *
  97 mac_sysv_msgqueue_label_alloc(void)
  98 {
  99         struct label *label;
 100
 101         label = mac_labelzone_alloc(MAC_WAITOK);
 102         if (label == NULL)
 103                 return (NULL);
 104         MAC_PERFORM(sysvmsq_label_init, label);
 105         return (label);
 106 }
 107
 108 void
 109 mac_sysvmsq_label_init(struct msqid_kernel *msqptr)
 110 {
 111
 112         msqptr->label = mac_sysv_msgqueue_label_alloc();
 113 }
 114
 115 void
 116 mac_sysvmsg_label_associate(kauth_cred_t cred, struct msqid_kernel *msqptr,
 117     struct msg *msgptr)
 118 {
 119
 120         MAC_PERFORM(sysvmsg_label_associate, cred, msqptr, msqptr->label,
 121                 msgptr, msgptr->label);
 122 }
 123
 124 void
 125 mac_sysvmsq_label_associate(kauth_cred_t cred, struct msqid_kernel *msqptr)
 126 {
 127
 128         MAC_PERFORM(sysvmsq_label_associate, cred, msqptr, msqptr->label);
 129 }
 130
 131 void
 132 mac_sysvmsg_label_recycle(struct msg *msgptr)
 133 {
 134
 135         MAC_PERFORM(sysvmsg_label_recycle, msgptr->label);
 136 }
 137
 138 void
 139 mac_sysvmsq_label_recycle(struct msqid_kernel *msqptr)
 140 {
 141
 142         MAC_PERFORM(sysvmsq_label_recycle, msqptr->label);
 143 }
 144
 145 int
 146 mac_sysvmsq_check_enqueue(kauth_cred_t cred, struct msg *msgptr,
 147         struct msqid_kernel *msqptr)
 148 {
 149         int error;
 150
 151 #if SECURITY_MAC_CHECK_ENFORCE
 152     /* 21167099 - only check if we allow write */
 153     if (!mac_sysvmsg_enforce)
 154         return (0);
 155 #endif
 156
 157         MAC_CHECK(sysvmsq_check_enqueue, cred,  msgptr, msgptr->label, msqptr,
 158             msqptr->label);
 159
 160         return(error);
 161 }
 162
 163 int
 164 mac_sysvmsq_check_msgrcv(kauth_cred_t cred, struct msg *msgptr)
 165 {
 166         int error;
 167
 168 #if SECURITY_MAC_CHECK_ENFORCE
 169     /* 21167099 - only check if we allow write */
 170     if (!mac_sysvmsg_enforce)
 171         return (0);
 172 #endif
 173
 174         MAC_CHECK(sysvmsq_check_msgrcv, cred, msgptr, msgptr->label);
 175
 176         return(error);
 177 }
 178
 179 int
 180 mac_sysvmsq_check_msgrmid(kauth_cred_t cred, struct msg *msgptr)
 181 {
 182         int error;
 183
 184 #if SECURITY_MAC_CHECK_ENFORCE
 185     /* 21167099 - only check if we allow write */
 186     if (!mac_sysvmsg_enforce)
 187         return (0);
 188 #endif
 189
 190         MAC_CHECK(sysvmsq_check_msgrmid, cred,  msgptr, msgptr->label);
 191
 192         return(error);
 193 }
 194
 195 int
 196 mac_sysvmsq_check_msqget(kauth_cred_t cred, struct msqid_kernel *msqptr)
 197 {
 198         int error;
 199
 200 #if SECURITY_MAC_CHECK_ENFORCE
 201     /* 21167099 - only check if we allow write */
 202     if (!mac_sysvmsg_enforce)
 203         return (0);
 204 #endif
 205
 206         MAC_CHECK(sysvmsq_check_msqget, cred, msqptr, msqptr->label);
 207
 208         return(error);
 209 }
 210
 211 int
 212 mac_sysvmsq_check_msqsnd(kauth_cred_t cred, struct msqid_kernel *msqptr)
 213 {
 214         int error;
 215
 216 #if SECURITY_MAC_CHECK_ENFORCE
 217     /* 21167099 - only check if we allow write */
 218     if (!mac_sysvmsg_enforce)
 219         return (0);
 220 #endif
 221
 222         MAC_CHECK(sysvmsq_check_msqsnd, cred, msqptr, msqptr->label);
 223
 224         return(error);
 225 }
 226
 227 int
 228 mac_sysvmsq_check_msqrcv(kauth_cred_t cred, struct msqid_kernel *msqptr)
 229 {
 230         int error;
 231
 232 #if SECURITY_MAC_CHECK_ENFORCE
 233     /* 21167099 - only check if we allow write */
 234     if (!mac_sysvmsg_enforce)
 235         return (0);
 236 #endif
 237
 238         MAC_CHECK(sysvmsq_check_msqrcv, cred, msqptr, msqptr->label);
 239
 240         return(error);
 241 }
 242
 243 int
 244 mac_sysvmsq_check_msqctl(kauth_cred_t cred, struct msqid_kernel *msqptr,
 245     int cmd)
 246 {
 247         int error;
 248
 249 #if SECURITY_MAC_CHECK_ENFORCE
 250     /* 21167099 - only check if we allow write */
 251     if (!mac_sysvmsg_enforce)
 252         return (0);
 253 #endif
 254
 255         MAC_CHECK(sysvmsq_check_msqctl, cred, msqptr, msqptr->label, cmd);
 256
 257         return(error);
 258 }