secmodel_keylock.c revision 1.2.2.3
1 1.2.2.3 yamt /* $NetBSD: secmodel_keylock.c,v 1.2.2.3 2010/03/11 15:04:40 yamt Exp $ */ 2 1.2.2.2 yamt /*- 3 1.2.2.2 yamt * Copyright (c) 2009 Marc Balmer <marc (at) msys.ch> 4 1.2.2.2 yamt * Copyright (c) 2006 Elad Efrat <elad (at) NetBSD.org> 5 1.2.2.2 yamt * All rights reserved. 6 1.2.2.2 yamt * 7 1.2.2.2 yamt * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 yamt * modification, are permitted provided that the following conditions 9 1.2.2.2 yamt * are met: 10 1.2.2.2 yamt * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 yamt * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 yamt * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 yamt * documentation and/or other materials provided with the distribution. 15 1.2.2.2 yamt * 3. The name of the author may not be used to endorse or promote products 16 1.2.2.2 yamt * derived from this software without specific prior written permission. 17 1.2.2.2 yamt * 18 1.2.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 1.2.2.2 yamt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 1.2.2.2 yamt * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 1.2.2.2 yamt * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 1.2.2.2 yamt * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 1.2.2.2 yamt * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 1.2.2.2 yamt * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 1.2.2.2 yamt * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 1.2.2.2 yamt * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 1.2.2.2 yamt * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 1.2.2.2 yamt */ 29 1.2.2.2 yamt 30 1.2.2.2 yamt /* 31 1.2.2.2 yamt * This file contains kauth(9) listeners needed to implement an experimental 32 1.2.2.2 yamt * keylock based security scheme. 33 1.2.2.2 yamt * 34 1.2.2.2 yamt * The position of the keylock is a system-global indication on what 35 1.2.2.2 yamt * operations are allowed or not. It affects all users, including root. 36 1.2.2.2 yamt * 37 1.2.2.2 yamt * Rules: 38 1.2.2.2 yamt * 39 1.2.2.2 yamt * - If the number of possible keylock positions is 0, assume there is no 40 1.2.2.2 yamt * keylock present, do not dissallow any action, i.e. do nothing 41 1.2.2.2 yamt * 42 1.2.2.2 yamt * - If the number of possible keylock positions is greater than 0, but the 43 1.2.2.2 yamt * current lock position is 0, assume tampering with the lock and forbid 44 1.2.2.2 yamt * all actions. 45 1.2.2.2 yamt * 46 1.2.2.2 yamt * - If the lock is in the lowest position, assume the system is locked and 47 1.2.2.2 yamt * forbid most actions. 48 1.2.2.2 yamt * 49 1.2.2.2 yamt * - If the lock is in the highest position, assume the system to be open and 50 1.2.2.2 yamt * forbid nothing. 51 1.2.2.2 yamt * 52 1.2.2.2 yamt * - If the security.models.keylock.order sysctl is set to a value != 0, 53 1.2.2.2 yamt * reverse this order. 54 1.2.2.2 yamt */ 55 1.2.2.2 yamt 56 1.2.2.2 yamt #include <sys/cdefs.h> 57 1.2.2.3 yamt __KERNEL_RCSID(0, "$NetBSD: secmodel_keylock.c,v 1.2.2.3 2010/03/11 15:04:40 yamt Exp $"); 58 1.2.2.2 yamt 59 1.2.2.2 yamt #include <sys/types.h> 60 1.2.2.2 yamt #include <sys/param.h> 61 1.2.2.2 yamt #include <sys/kauth.h> 62 1.2.2.2 yamt 63 1.2.2.2 yamt #include <sys/conf.h> 64 1.2.2.2 yamt #include <sys/mount.h> 65 1.2.2.2 yamt #include <sys/sysctl.h> 66 1.2.2.2 yamt #include <sys/vnode.h> 67 1.2.2.3 yamt #include <sys/timevar.h> 68 1.2.2.2 yamt 69 1.2.2.2 yamt #include <dev/keylock.h> 70 1.2.2.2 yamt 71 1.2.2.2 yamt #include <miscfs/specfs/specdev.h> 72 1.2.2.2 yamt 73 1.2.2.2 yamt #include <secmodel/keylock/keylock.h> 74 1.2.2.2 yamt 75 1.2.2.2 yamt static kauth_listener_t l_system, l_process, l_network, l_machdep, l_device; 76 1.2.2.2 yamt 77 1.2.2.2 yamt SYSCTL_SETUP(sysctl_security_keylock_setup, 78 1.2.2.2 yamt "sysctl security keylock setup") 79 1.2.2.2 yamt { 80 1.2.2.2 yamt const struct sysctlnode *rnode; 81 1.2.2.2 yamt 82 1.2.2.2 yamt sysctl_createv(clog, 0, NULL, &rnode, 83 1.2.2.2 yamt CTLFLAG_PERMANENT, 84 1.2.2.2 yamt CTLTYPE_NODE, "security", NULL, 85 1.2.2.2 yamt NULL, 0, NULL, 0, 86 1.2.2.2 yamt CTL_SECURITY, CTL_EOL); 87 1.2.2.2 yamt 88 1.2.2.2 yamt sysctl_createv(clog, 0, &rnode, &rnode, 89 1.2.2.2 yamt CTLFLAG_PERMANENT, 90 1.2.2.2 yamt CTLTYPE_NODE, "models", NULL, 91 1.2.2.2 yamt NULL, 0, NULL, 0, 92 1.2.2.2 yamt CTL_CREATE, CTL_EOL); 93 1.2.2.2 yamt 94 1.2.2.2 yamt sysctl_createv(clog, 0, &rnode, &rnode, 95 1.2.2.2 yamt CTLFLAG_PERMANENT, 96 1.2.2.2 yamt CTLTYPE_NODE, "keylock", 97 1.2.2.2 yamt SYSCTL_DESCR("Keylock security model"), 98 1.2.2.2 yamt NULL, 0, NULL, 0, 99 1.2.2.2 yamt CTL_CREATE, CTL_EOL); 100 1.2.2.2 yamt 101 1.2.2.2 yamt sysctl_createv(clog, 0, &rnode, NULL, 102 1.2.2.2 yamt CTLFLAG_PERMANENT, 103 1.2.2.2 yamt CTLTYPE_STRING, "name", NULL, 104 1.2.2.2 yamt NULL, 0, __UNCONST("Keylock"), 0, 105 1.2.2.2 yamt CTL_CREATE, CTL_EOL); 106 1.2.2.2 yamt } 107 1.2.2.2 yamt 108 1.2.2.2 yamt void 109 1.2.2.2 yamt secmodel_keylock_init(void) 110 1.2.2.2 yamt { 111 1.2.2.2 yamt } 112 1.2.2.2 yamt 113 1.2.2.2 yamt void 114 1.2.2.2 yamt secmodel_keylock_start(void) 115 1.2.2.2 yamt { 116 1.2.2.2 yamt l_system = kauth_listen_scope(KAUTH_SCOPE_SYSTEM, 117 1.2.2.2 yamt secmodel_keylock_system_cb, NULL); 118 1.2.2.2 yamt l_process = kauth_listen_scope(KAUTH_SCOPE_PROCESS, 119 1.2.2.2 yamt secmodel_keylock_process_cb, NULL); 120 1.2.2.2 yamt l_network = kauth_listen_scope(KAUTH_SCOPE_NETWORK, 121 1.2.2.2 yamt secmodel_keylock_network_cb, NULL); 122 1.2.2.2 yamt l_machdep = kauth_listen_scope(KAUTH_SCOPE_MACHDEP, 123 1.2.2.2 yamt secmodel_keylock_machdep_cb, NULL); 124 1.2.2.2 yamt l_device = kauth_listen_scope(KAUTH_SCOPE_DEVICE, 125 1.2.2.2 yamt secmodel_keylock_device_cb, NULL); 126 1.2.2.2 yamt } 127 1.2.2.2 yamt 128 1.2.2.2 yamt void 129 1.2.2.2 yamt secmodel_keylock_stop(void) 130 1.2.2.2 yamt { 131 1.2.2.2 yamt kauth_unlisten_scope(l_system); 132 1.2.2.2 yamt kauth_unlisten_scope(l_process); 133 1.2.2.2 yamt kauth_unlisten_scope(l_network); 134 1.2.2.2 yamt kauth_unlisten_scope(l_machdep); 135 1.2.2.2 yamt kauth_unlisten_scope(l_device); 136 1.2.2.2 yamt } 137 1.2.2.2 yamt 138 1.2.2.2 yamt /* 139 1.2.2.2 yamt * kauth(9) listener 140 1.2.2.2 yamt * 141 1.2.2.2 yamt * Security model: Multi-position keylock 142 1.2.2.2 yamt * Scope: System 143 1.2.2.2 yamt * Responsibility: Keylock 144 1.2.2.2 yamt */ 145 1.2.2.2 yamt int 146 1.2.2.2 yamt secmodel_keylock_system_cb(kauth_cred_t cred, 147 1.2.2.2 yamt kauth_action_t action, void *cookie, void *arg0, void *arg1, 148 1.2.2.2 yamt void *arg2, void *arg3) 149 1.2.2.2 yamt { 150 1.2.2.2 yamt int result; 151 1.2.2.2 yamt enum kauth_system_req req; 152 1.2.2.2 yamt int kstate; 153 1.2.2.2 yamt 154 1.2.2.2 yamt kstate = keylock_state(); 155 1.2.2.2 yamt if (kstate == KEYLOCK_ABSENT) 156 1.2.2.2 yamt return KAUTH_RESULT_DEFER; 157 1.2.2.2 yamt else if (kstate == KEYLOCK_TAMPER) 158 1.2.2.2 yamt return KAUTH_RESULT_DENY; 159 1.2.2.2 yamt 160 1.2.2.2 yamt result = KAUTH_RESULT_DEFER; 161 1.2.2.2 yamt req = (enum kauth_system_req)arg0; 162 1.2.2.2 yamt 163 1.2.2.2 yamt switch (action) { 164 1.2.2.2 yamt case KAUTH_SYSTEM_CHSYSFLAGS: 165 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 166 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 167 1.2.2.2 yamt break; 168 1.2.2.2 yamt 169 1.2.2.2 yamt case KAUTH_SYSTEM_TIME: 170 1.2.2.2 yamt switch (req) { 171 1.2.2.2 yamt case KAUTH_REQ_SYSTEM_TIME_RTCOFFSET: 172 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 173 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 174 1.2.2.2 yamt break; 175 1.2.2.2 yamt 176 1.2.2.2 yamt case KAUTH_REQ_SYSTEM_TIME_SYSTEM: { 177 1.2.2.2 yamt struct timespec *ts = arg1; 178 1.2.2.2 yamt struct timespec *delta = arg2; 179 1.2.2.2 yamt 180 1.2.2.3 yamt if (keylock_position() > 1 && time_wraps(ts, delta)) 181 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 182 1.2.2.2 yamt break; 183 1.2.2.2 yamt } 184 1.2.2.2 yamt default: 185 1.2.2.2 yamt break; 186 1.2.2.2 yamt } 187 1.2.2.2 yamt break; 188 1.2.2.2 yamt 189 1.2.2.2 yamt case KAUTH_SYSTEM_MODULE: 190 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 191 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 192 1.2.2.2 yamt break; 193 1.2.2.2 yamt 194 1.2.2.2 yamt case KAUTH_SYSTEM_MOUNT: 195 1.2.2.2 yamt switch (req) { 196 1.2.2.2 yamt case KAUTH_REQ_SYSTEM_MOUNT_NEW: 197 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 198 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 199 1.2.2.2 yamt 200 1.2.2.2 yamt break; 201 1.2.2.2 yamt 202 1.2.2.2 yamt case KAUTH_REQ_SYSTEM_MOUNT_UPDATE: 203 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) { 204 1.2.2.2 yamt struct mount *mp = arg1; 205 1.2.2.2 yamt u_long flags = (u_long)arg2; 206 1.2.2.2 yamt 207 1.2.2.2 yamt /* 208 1.2.2.2 yamt * Can only degrade from read/write to 209 1.2.2.2 yamt * read-only. 210 1.2.2.2 yamt */ 211 1.2.2.2 yamt if (flags != (mp->mnt_flag | MNT_RDONLY | 212 1.2.2.2 yamt MNT_RELOAD | MNT_FORCE | MNT_UPDATE)) 213 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 214 1.2.2.2 yamt } 215 1.2.2.2 yamt break; 216 1.2.2.2 yamt default: 217 1.2.2.2 yamt break; 218 1.2.2.2 yamt } 219 1.2.2.2 yamt 220 1.2.2.2 yamt break; 221 1.2.2.2 yamt 222 1.2.2.2 yamt case KAUTH_SYSTEM_SYSCTL: 223 1.2.2.2 yamt switch (req) { 224 1.2.2.2 yamt case KAUTH_REQ_SYSTEM_SYSCTL_ADD: 225 1.2.2.2 yamt case KAUTH_REQ_SYSTEM_SYSCTL_DELETE: 226 1.2.2.2 yamt case KAUTH_REQ_SYSTEM_SYSCTL_DESC: 227 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 228 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 229 1.2.2.2 yamt break; 230 1.2.2.2 yamt default: 231 1.2.2.2 yamt break; 232 1.2.2.2 yamt } 233 1.2.2.2 yamt break; 234 1.2.2.2 yamt 235 1.2.2.2 yamt case KAUTH_SYSTEM_SETIDCORE: 236 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 237 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 238 1.2.2.2 yamt break; 239 1.2.2.2 yamt 240 1.2.2.2 yamt case KAUTH_SYSTEM_DEBUG: 241 1.2.2.2 yamt switch (req) { 242 1.2.2.2 yamt case KAUTH_REQ_SYSTEM_DEBUG_IPKDB: 243 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 244 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 245 1.2.2.2 yamt break; 246 1.2.2.2 yamt default: 247 1.2.2.2 yamt break; 248 1.2.2.2 yamt } 249 1.2.2.2 yamt break; 250 1.2.2.2 yamt } 251 1.2.2.2 yamt 252 1.2.2.2 yamt return result; 253 1.2.2.2 yamt } 254 1.2.2.2 yamt 255 1.2.2.2 yamt /* 256 1.2.2.2 yamt * kauth(9) listener 257 1.2.2.2 yamt * 258 1.2.2.2 yamt * Security model: Multi-position keylock 259 1.2.2.2 yamt * Scope: Process 260 1.2.2.2 yamt * Responsibility: Keylock 261 1.2.2.2 yamt */ 262 1.2.2.2 yamt int 263 1.2.2.2 yamt secmodel_keylock_process_cb(kauth_cred_t cred, 264 1.2.2.2 yamt kauth_action_t action, void *cookie, void *arg0, 265 1.2.2.2 yamt void *arg1, void *arg2, void *arg3) 266 1.2.2.2 yamt { 267 1.2.2.2 yamt struct proc *p; 268 1.2.2.2 yamt int result, kstate; 269 1.2.2.2 yamt 270 1.2.2.2 yamt kstate = keylock_state(); 271 1.2.2.2 yamt if (kstate == KEYLOCK_ABSENT) 272 1.2.2.2 yamt return KAUTH_RESULT_DEFER; 273 1.2.2.2 yamt else if (kstate == KEYLOCK_TAMPER) 274 1.2.2.2 yamt return KAUTH_RESULT_DENY; 275 1.2.2.2 yamt 276 1.2.2.2 yamt result = KAUTH_RESULT_DEFER; 277 1.2.2.2 yamt p = arg0; 278 1.2.2.2 yamt 279 1.2.2.2 yamt switch (action) { 280 1.2.2.2 yamt case KAUTH_PROCESS_PROCFS: { 281 1.2.2.2 yamt enum kauth_process_req req; 282 1.2.2.2 yamt 283 1.2.2.2 yamt req = (enum kauth_process_req)arg2; 284 1.2.2.2 yamt switch (req) { 285 1.2.2.2 yamt case KAUTH_REQ_PROCESS_PROCFS_READ: 286 1.2.2.2 yamt break; 287 1.2.2.2 yamt 288 1.2.2.2 yamt case KAUTH_REQ_PROCESS_PROCFS_RW: 289 1.2.2.2 yamt case KAUTH_REQ_PROCESS_PROCFS_WRITE: 290 1.2.2.2 yamt if ((p == initproc) && (kstate != KEYLOCK_OPEN)) 291 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 292 1.2.2.2 yamt 293 1.2.2.2 yamt break; 294 1.2.2.2 yamt default: 295 1.2.2.2 yamt break; 296 1.2.2.2 yamt } 297 1.2.2.2 yamt 298 1.2.2.2 yamt break; 299 1.2.2.2 yamt } 300 1.2.2.2 yamt 301 1.2.2.2 yamt case KAUTH_PROCESS_PTRACE: 302 1.2.2.2 yamt if ((p == initproc) && (kstate != KEYLOCK_OPEN)) 303 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 304 1.2.2.2 yamt 305 1.2.2.2 yamt break; 306 1.2.2.2 yamt 307 1.2.2.2 yamt case KAUTH_PROCESS_CORENAME: 308 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 309 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 310 1.2.2.2 yamt break; 311 1.2.2.2 yamt } 312 1.2.2.2 yamt return result; 313 1.2.2.2 yamt } 314 1.2.2.2 yamt 315 1.2.2.2 yamt /* 316 1.2.2.2 yamt * kauth(9) listener 317 1.2.2.2 yamt * 318 1.2.2.2 yamt * Security model: Multi-position keylock 319 1.2.2.2 yamt * Scope: Network 320 1.2.2.2 yamt * Responsibility: Keylock 321 1.2.2.2 yamt */ 322 1.2.2.2 yamt int 323 1.2.2.2 yamt secmodel_keylock_network_cb(kauth_cred_t cred, 324 1.2.2.2 yamt kauth_action_t action, void *cookie, void *arg0, 325 1.2.2.2 yamt void *arg1, void *arg2, void *arg3) 326 1.2.2.2 yamt { 327 1.2.2.2 yamt int result, kstate; 328 1.2.2.2 yamt enum kauth_network_req req; 329 1.2.2.2 yamt 330 1.2.2.2 yamt kstate = keylock_state(); 331 1.2.2.2 yamt if (kstate == KEYLOCK_ABSENT) 332 1.2.2.2 yamt return KAUTH_RESULT_DEFER; 333 1.2.2.2 yamt else if (kstate == KEYLOCK_TAMPER) 334 1.2.2.2 yamt return KAUTH_RESULT_DENY; 335 1.2.2.2 yamt 336 1.2.2.2 yamt result = KAUTH_RESULT_DEFER; 337 1.2.2.2 yamt req = (enum kauth_network_req)arg0; 338 1.2.2.2 yamt 339 1.2.2.2 yamt switch (action) { 340 1.2.2.2 yamt case KAUTH_NETWORK_FIREWALL: 341 1.2.2.2 yamt switch (req) { 342 1.2.2.2 yamt case KAUTH_REQ_NETWORK_FIREWALL_FW: 343 1.2.2.2 yamt case KAUTH_REQ_NETWORK_FIREWALL_NAT: 344 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 345 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 346 1.2.2.2 yamt break; 347 1.2.2.2 yamt 348 1.2.2.2 yamt default: 349 1.2.2.2 yamt break; 350 1.2.2.2 yamt } 351 1.2.2.2 yamt break; 352 1.2.2.2 yamt 353 1.2.2.2 yamt case KAUTH_NETWORK_FORWSRCRT: 354 1.2.2.2 yamt if (kstate != KEYLOCK_OPEN) 355 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 356 1.2.2.2 yamt break; 357 1.2.2.2 yamt } 358 1.2.2.2 yamt 359 1.2.2.2 yamt return result; 360 1.2.2.2 yamt } 361 1.2.2.2 yamt 362 1.2.2.2 yamt /* 363 1.2.2.2 yamt * kauth(9) listener 364 1.2.2.2 yamt * 365 1.2.2.2 yamt * Security model: Multi-position keylock 366 1.2.2.2 yamt * Scope: Machdep 367 1.2.2.2 yamt * Responsibility: Keylock 368 1.2.2.2 yamt */ 369 1.2.2.2 yamt int 370 1.2.2.2 yamt secmodel_keylock_machdep_cb(kauth_cred_t cred, 371 1.2.2.2 yamt kauth_action_t action, void *cookie, void *arg0, 372 1.2.2.2 yamt void *arg1, void *arg2, void *arg3) 373 1.2.2.2 yamt { 374 1.2.2.2 yamt int result, kstate; 375 1.2.2.2 yamt 376 1.2.2.2 yamt kstate = keylock_state(); 377 1.2.2.2 yamt if (kstate == KEYLOCK_ABSENT) 378 1.2.2.2 yamt return KAUTH_RESULT_DEFER; 379 1.2.2.2 yamt else if (kstate == KEYLOCK_TAMPER) 380 1.2.2.2 yamt return KAUTH_RESULT_DENY; 381 1.2.2.2 yamt 382 1.2.2.2 yamt result = KAUTH_RESULT_DEFER; 383 1.2.2.2 yamt 384 1.2.2.2 yamt switch (action) { 385 1.2.2.2 yamt case KAUTH_MACHDEP_IOPERM_SET: 386 1.2.2.2 yamt case KAUTH_MACHDEP_IOPL: 387 1.2.2.2 yamt if (kstate != KEYLOCK_OPEN) 388 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 389 1.2.2.2 yamt break; 390 1.2.2.2 yamt 391 1.2.2.2 yamt case KAUTH_MACHDEP_UNMANAGEDMEM: 392 1.2.2.2 yamt if (kstate != KEYLOCK_OPEN) 393 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 394 1.2.2.2 yamt break; 395 1.2.2.2 yamt } 396 1.2.2.2 yamt 397 1.2.2.2 yamt return result; 398 1.2.2.2 yamt } 399 1.2.2.2 yamt 400 1.2.2.2 yamt /* 401 1.2.2.2 yamt * kauth(9) listener 402 1.2.2.2 yamt * 403 1.2.2.2 yamt * Security model: Multi-position keylock 404 1.2.2.2 yamt * Scope: Device 405 1.2.2.2 yamt * Responsibility: Keylock 406 1.2.2.2 yamt */ 407 1.2.2.2 yamt int 408 1.2.2.2 yamt secmodel_keylock_device_cb(kauth_cred_t cred, 409 1.2.2.2 yamt kauth_action_t action, void *cookie, void *arg0, 410 1.2.2.2 yamt void *arg1, void *arg2, void *arg3) 411 1.2.2.2 yamt { 412 1.2.2.3 yamt int result, kstate, error; 413 1.2.2.2 yamt 414 1.2.2.2 yamt kstate = keylock_state(); 415 1.2.2.2 yamt if (kstate == KEYLOCK_ABSENT) 416 1.2.2.2 yamt return KAUTH_RESULT_DEFER; 417 1.2.2.2 yamt else if (kstate == KEYLOCK_TAMPER) 418 1.2.2.2 yamt return KAUTH_RESULT_DENY; 419 1.2.2.2 yamt 420 1.2.2.2 yamt result = KAUTH_RESULT_DEFER; 421 1.2.2.2 yamt 422 1.2.2.2 yamt switch (action) { 423 1.2.2.2 yamt case KAUTH_DEVICE_RAWIO_SPEC: { 424 1.2.2.3 yamt struct vnode *vp; 425 1.2.2.2 yamt enum kauth_device_req req; 426 1.2.2.2 yamt 427 1.2.2.2 yamt req = (enum kauth_device_req)arg0; 428 1.2.2.2 yamt vp = arg1; 429 1.2.2.2 yamt 430 1.2.2.2 yamt KASSERT(vp != NULL); 431 1.2.2.2 yamt 432 1.2.2.2 yamt /* Handle /dev/mem and /dev/kmem. */ 433 1.2.2.3 yamt if (iskmemvp(vp)) { 434 1.2.2.2 yamt switch (req) { 435 1.2.2.2 yamt case KAUTH_REQ_DEVICE_RAWIO_SPEC_READ: 436 1.2.2.2 yamt break; 437 1.2.2.2 yamt 438 1.2.2.2 yamt case KAUTH_REQ_DEVICE_RAWIO_SPEC_WRITE: 439 1.2.2.2 yamt case KAUTH_REQ_DEVICE_RAWIO_SPEC_RW: 440 1.2.2.2 yamt if (kstate != KEYLOCK_OPEN) 441 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 442 1.2.2.2 yamt break; 443 1.2.2.2 yamt default: 444 1.2.2.2 yamt break; 445 1.2.2.2 yamt } 446 1.2.2.2 yamt break; 447 1.2.2.2 yamt } 448 1.2.2.2 yamt 449 1.2.2.2 yamt switch (req) { 450 1.2.2.2 yamt case KAUTH_REQ_DEVICE_RAWIO_SPEC_READ: 451 1.2.2.2 yamt break; 452 1.2.2.2 yamt 453 1.2.2.2 yamt case KAUTH_REQ_DEVICE_RAWIO_SPEC_WRITE: 454 1.2.2.2 yamt case KAUTH_REQ_DEVICE_RAWIO_SPEC_RW: 455 1.2.2.3 yamt error = rawdev_mounted(vp, NULL); 456 1.2.2.2 yamt 457 1.2.2.3 yamt if (error == EINVAL) 458 1.2.2.2 yamt break; 459 1.2.2.2 yamt 460 1.2.2.3 yamt if (error && (kstate != KEYLOCK_OPEN)) 461 1.2.2.2 yamt break; 462 1.2.2.2 yamt 463 1.2.2.2 yamt if (kstate == KEYLOCK_CLOSE) 464 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 465 1.2.2.2 yamt 466 1.2.2.2 yamt break; 467 1.2.2.2 yamt default: 468 1.2.2.2 yamt break; 469 1.2.2.2 yamt } 470 1.2.2.2 yamt break; 471 1.2.2.2 yamt } 472 1.2.2.2 yamt 473 1.2.2.2 yamt case KAUTH_DEVICE_RAWIO_PASSTHRU: 474 1.2.2.2 yamt if (kstate != KEYLOCK_OPEN) { 475 1.2.2.2 yamt u_long bits; 476 1.2.2.2 yamt 477 1.2.2.2 yamt bits = (u_long)arg0; 478 1.2.2.2 yamt 479 1.2.2.2 yamt KASSERT(bits != 0); 480 1.2.2.2 yamt KASSERT((bits & ~KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_ALL) 481 1.2.2.2 yamt == 0); 482 1.2.2.2 yamt 483 1.2.2.2 yamt if (bits & ~KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READCONF) 484 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 485 1.2.2.2 yamt } 486 1.2.2.2 yamt break; 487 1.2.2.2 yamt 488 1.2.2.2 yamt case KAUTH_DEVICE_GPIO_PINSET: 489 1.2.2.2 yamt if (kstate != KEYLOCK_OPEN) 490 1.2.2.2 yamt result = KAUTH_RESULT_DENY; 491 1.2.2.2 yamt break; 492 1.2.2.2 yamt default: 493 1.2.2.2 yamt break; 494 1.2.2.2 yamt } 495 1.2.2.2 yamt return result; 496 1.2.2.2 yamt } 497
Indexes created Thu Oct 02 14:10:14 GMT 2025