1 /*- 2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 3 * Copyright (c) 2006 SPARTA, Inc. 4 * Copyright (c) 2007 Robert N. M. Watson 5 * All rights reserved. 6 * 7 * This software was developed for the FreeBSD Project in part by Network 8 * Associates Laboratories, the Security Research Division of Network 9 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 10 * as part of the DARPA CHATS research program. 11 * 12 * Portions of this software were developed by Robert Watson for the 13 * TrustedBSD Project. 14 * 15 * This software was enhanced by SPARTA ISSO under SPAWAR contract 16 * N66001-04-C-6019 ("SEFOS"). 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 /* 41 * MAC Framework entry points relating to overall operation of system, 42 * including global services such as the kernel environment and loadable 43 * modules. 44 * 45 * System checks often align with existing privilege checks, but provide 46 * additional security context that may be relevant to policies, such as the 47 * specific object being operated on. 48 */ 49 50 #include <sys/cdefs.h> 51 __FBSDID("$FreeBSD$"); 52 53 #include "opt_mac.h" 54 55 #include <sys/param.h> 56 #include <sys/kernel.h> 57 #include <sys/lock.h> 58 #include <sys/malloc.h> 59 #include <sys/module.h> 60 #include <sys/mutex.h> 61 #include <sys/systm.h> 62 #include <sys/vnode.h> 63 #include <sys/sysctl.h> 64 65 #include <security/mac/mac_framework.h> 66 #include <security/mac/mac_internal.h> 67 #include <security/mac/mac_policy.h> 68 69 int 70 mac_kenv_check_dump(struct ucred *cred) 71 { 72 int error; 73 74 MAC_CHECK(kenv_check_dump, cred); 75 76 return (error); 77 } 78 79 int 80 mac_kenv_check_get(struct ucred *cred, char *name) 81 { 82 int error; 83 84 MAC_CHECK(kenv_check_get, cred, name); 85 86 return (error); 87 } 88 89 int 90 mac_kenv_check_set(struct ucred *cred, char *name, char *value) 91 { 92 int error; 93 94 MAC_CHECK(kenv_check_set, cred, name, value); 95 96 return (error); 97 } 98 99 int 100 mac_kenv_check_unset(struct ucred *cred, char *name) 101 { 102 int error; 103 104 MAC_CHECK(kenv_check_unset, cred, name); 105 106 return (error); 107 } 108 109 int 110 mac_kld_check_load(struct ucred *cred, struct vnode *vp) 111 { 112 int error; 113 114 ASSERT_VOP_LOCKED(vp, "mac_kld_check_load"); 115 116 MAC_CHECK(kld_check_load, cred, vp, vp->v_label); 117 118 return (error); 119 } 120 121 int 122 mac_kld_check_stat(struct ucred *cred) 123 { 124 int error; 125 126 MAC_CHECK(kld_check_stat, cred); 127 128 return (error); 129 } 130 131 int 132 mac_system_check_acct(struct ucred *cred, struct vnode *vp) 133 { 134 int error; 135 136 if (vp != NULL) { 137 ASSERT_VOP_LOCKED(vp, "mac_system_check_acct"); 138 } 139 140 MAC_CHECK(system_check_acct, cred, vp, 141 vp != NULL ? vp->v_label : NULL); 142 143 return (error); 144 } 145 146 int 147 mac_system_check_reboot(struct ucred *cred, int howto) 148 { 149 int error; 150 151 MAC_CHECK(system_check_reboot, cred, howto); 152 153 return (error); 154 } 155 156 int 157 mac_system_check_swapon(struct ucred *cred, struct vnode *vp) 158 { 159 int error; 160 161 ASSERT_VOP_LOCKED(vp, "mac_system_check_swapon"); 162 163 MAC_CHECK(system_check_swapon, cred, vp, vp->v_label); 164 return (error); 165 } 166 167 int 168 mac_system_check_swapoff(struct ucred *cred, struct vnode *vp) 169 { 170 int error; 171 172 ASSERT_VOP_LOCKED(vp, "mac_system_check_swapoff"); 173 174 MAC_CHECK(system_check_swapoff, cred, vp, vp->v_label); 175 return (error); 176 } 177 178 int 179 mac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 180 void *arg1, int arg2, struct sysctl_req *req) 181 { 182 int error; 183 184 /* 185 * XXXMAC: We would very much like to assert the SYSCTL_LOCK here, 186 * but since it's not exported from kern_sysctl.c, we can't. 187 */ 188 MAC_CHECK(system_check_sysctl, cred, oidp, arg1, arg2, req); 189 190 return (error); 191 } 192