| 1 | /* $NetBSD: secmodel_securelevel.c,v 1.30 2014/02/25 18:30:13 pooka Exp $ */ |
| 2 | /*- |
| 3 | * Copyright (c) 2006 Elad Efrat <elad@NetBSD.org> |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | /* |
| 30 | * This file contains kauth(9) listeners needed to implement the traditional |
| 31 | * NetBSD securelevel. |
| 32 | * |
| 33 | * The securelevel is a system-global indication on what operations are |
| 34 | * allowed or not. It affects all users, including root. |
| 35 | */ |
| 36 | |
| 37 | #include <sys/cdefs.h> |
| 38 | __KERNEL_RCSID(0, "$NetBSD: secmodel_securelevel.c,v 1.30 2014/02/25 18:30:13 pooka Exp $" ); |
| 39 | |
| 40 | #ifdef _KERNEL_OPT |
| 41 | #include "opt_insecure.h" |
| 42 | #endif /* _KERNEL_OPT */ |
| 43 | |
| 44 | #include <sys/types.h> |
| 45 | #include <sys/param.h> |
| 46 | #include <sys/kauth.h> |
| 47 | |
| 48 | #include <sys/conf.h> |
| 49 | #include <sys/mount.h> |
| 50 | #include <sys/sysctl.h> |
| 51 | #include <sys/vnode.h> |
| 52 | #include <sys/module.h> |
| 53 | #include <sys/timevar.h> |
| 54 | |
| 55 | #include <miscfs/specfs/specdev.h> |
| 56 | |
| 57 | #include <secmodel/secmodel.h> |
| 58 | #include <secmodel/securelevel/securelevel.h> |
| 59 | |
| 60 | MODULE(MODULE_CLASS_SECMODEL, securelevel, NULL); |
| 61 | |
| 62 | static int securelevel; |
| 63 | |
| 64 | static kauth_listener_t l_system, l_process, l_network, l_machdep, l_device, |
| 65 | l_vnode; |
| 66 | |
| 67 | static secmodel_t securelevel_sm; |
| 68 | static struct sysctllog *securelevel_sysctl_log; |
| 69 | |
| 70 | /* |
| 71 | * Sysctl helper routine for securelevel. Ensures that the value only rises |
| 72 | * unless the caller is init. |
| 73 | */ |
| 74 | int |
| 75 | secmodel_securelevel_sysctl(SYSCTLFN_ARGS) |
| 76 | { |
| 77 | int newsecurelevel, error; |
| 78 | struct sysctlnode node; |
| 79 | |
| 80 | newsecurelevel = securelevel; |
| 81 | node = *rnode; |
| 82 | node.sysctl_data = &newsecurelevel; |
| 83 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| 84 | if (error || newp == NULL) |
| 85 | return (error); |
| 86 | |
| 87 | if ((newsecurelevel < securelevel) && (l->l_proc != initproc)) |
| 88 | return (EPERM); |
| 89 | |
| 90 | securelevel = newsecurelevel; |
| 91 | |
| 92 | return (error); |
| 93 | } |
| 94 | |
| 95 | void |
| 96 | sysctl_security_securelevel_setup(struct sysctllog **clog) |
| 97 | { |
| 98 | const struct sysctlnode *rnode, *rnode2; |
| 99 | |
| 100 | sysctl_createv(clog, 0, NULL, &rnode, |
| 101 | CTLFLAG_PERMANENT, |
| 102 | CTLTYPE_NODE, "models" , NULL, |
| 103 | NULL, 0, NULL, 0, |
| 104 | CTL_SECURITY, CTL_CREATE, CTL_EOL); |
| 105 | |
| 106 | /* Compatibility: security.models.bsd44 */ |
| 107 | rnode2 = rnode; |
| 108 | sysctl_createv(clog, 0, &rnode2, &rnode2, |
| 109 | CTLFLAG_PERMANENT, |
| 110 | CTLTYPE_NODE, "bsd44" , NULL, |
| 111 | NULL, 0, NULL, 0, |
| 112 | CTL_CREATE, CTL_EOL); |
| 113 | |
| 114 | /* Compatibility: security.models.bsd44.securelevel */ |
| 115 | sysctl_createv(clog, 0, &rnode2, NULL, |
| 116 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 117 | CTLTYPE_INT, "securelevel" , |
| 118 | SYSCTL_DESCR("System security level" ), |
| 119 | secmodel_securelevel_sysctl, 0, NULL, 0, |
| 120 | CTL_CREATE, CTL_EOL); |
| 121 | |
| 122 | sysctl_createv(clog, 0, &rnode, &rnode, |
| 123 | CTLFLAG_PERMANENT, |
| 124 | CTLTYPE_NODE, "securelevel" , NULL, |
| 125 | NULL, 0, NULL, 0, |
| 126 | CTL_CREATE, CTL_EOL); |
| 127 | |
| 128 | sysctl_createv(clog, 0, &rnode, NULL, |
| 129 | CTLFLAG_PERMANENT, |
| 130 | CTLTYPE_STRING, "name" , NULL, |
| 131 | NULL, 0, __UNCONST(SECMODEL_SECURELEVEL_NAME), 0, |
| 132 | CTL_CREATE, CTL_EOL); |
| 133 | |
| 134 | sysctl_createv(clog, 0, &rnode, NULL, |
| 135 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 136 | CTLTYPE_INT, "securelevel" , |
| 137 | SYSCTL_DESCR("System security level" ), |
| 138 | secmodel_securelevel_sysctl, 0, NULL, 0, |
| 139 | CTL_CREATE, CTL_EOL); |
| 140 | |
| 141 | /* Compatibility: kern.securelevel */ |
| 142 | |
| 143 | sysctl_createv(clog, 0, NULL, NULL, |
| 144 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 145 | CTLTYPE_INT, "securelevel" , |
| 146 | SYSCTL_DESCR("System security level" ), |
| 147 | secmodel_securelevel_sysctl, 0, NULL, 0, |
| 148 | CTL_KERN, KERN_SECURELVL, CTL_EOL); |
| 149 | } |
| 150 | |
| 151 | void |
| 152 | secmodel_securelevel_init(void) |
| 153 | { |
| 154 | #ifdef INSECURE |
| 155 | securelevel = -1; |
| 156 | #else |
| 157 | securelevel = 0; |
| 158 | #endif /* INSECURE */ |
| 159 | } |
| 160 | |
| 161 | void |
| 162 | secmodel_securelevel_start(void) |
| 163 | { |
| 164 | l_system = kauth_listen_scope(KAUTH_SCOPE_SYSTEM, |
| 165 | secmodel_securelevel_system_cb, NULL); |
| 166 | l_process = kauth_listen_scope(KAUTH_SCOPE_PROCESS, |
| 167 | secmodel_securelevel_process_cb, NULL); |
| 168 | l_network = kauth_listen_scope(KAUTH_SCOPE_NETWORK, |
| 169 | secmodel_securelevel_network_cb, NULL); |
| 170 | l_machdep = kauth_listen_scope(KAUTH_SCOPE_MACHDEP, |
| 171 | secmodel_securelevel_machdep_cb, NULL); |
| 172 | l_device = kauth_listen_scope(KAUTH_SCOPE_DEVICE, |
| 173 | secmodel_securelevel_device_cb, NULL); |
| 174 | l_vnode = kauth_listen_scope(KAUTH_SCOPE_VNODE, |
| 175 | secmodel_securelevel_vnode_cb, NULL); |
| 176 | } |
| 177 | |
| 178 | void |
| 179 | secmodel_securelevel_stop(void) |
| 180 | { |
| 181 | kauth_unlisten_scope(l_system); |
| 182 | kauth_unlisten_scope(l_process); |
| 183 | kauth_unlisten_scope(l_network); |
| 184 | kauth_unlisten_scope(l_machdep); |
| 185 | kauth_unlisten_scope(l_device); |
| 186 | kauth_unlisten_scope(l_vnode); |
| 187 | } |
| 188 | |
| 189 | static int |
| 190 | securelevel_eval(const char *what, void *arg, void *ret) |
| 191 | { |
| 192 | int error = 0; |
| 193 | |
| 194 | if (strcasecmp(what, "is-securelevel-above" ) == 0) { |
| 195 | int level = (int)(uintptr_t)arg; |
| 196 | bool *bp = ret; |
| 197 | |
| 198 | *bp = (securelevel > level); |
| 199 | } else { |
| 200 | error = ENOENT; |
| 201 | } |
| 202 | |
| 203 | return error; |
| 204 | } |
| 205 | |
| 206 | static int |
| 207 | securelevel_modcmd(modcmd_t cmd, void *arg) |
| 208 | { |
| 209 | int error = 0; |
| 210 | |
| 211 | switch (cmd) { |
| 212 | case MODULE_CMD_INIT: |
| 213 | secmodel_securelevel_init(); |
| 214 | error = secmodel_register(&securelevel_sm, |
| 215 | SECMODEL_SECURELEVEL_ID, SECMODEL_SECURELEVEL_NAME, |
| 216 | NULL, securelevel_eval, NULL); |
| 217 | if (error != 0) |
| 218 | printf("securelevel_modcmd::init: secmodel_register " |
| 219 | "returned %d\n" , error); |
| 220 | |
| 221 | secmodel_securelevel_start(); |
| 222 | sysctl_security_securelevel_setup(&securelevel_sysctl_log); |
| 223 | break; |
| 224 | |
| 225 | case MODULE_CMD_FINI: |
| 226 | sysctl_teardown(&securelevel_sysctl_log); |
| 227 | secmodel_securelevel_stop(); |
| 228 | |
| 229 | error = secmodel_deregister(securelevel_sm); |
| 230 | if (error != 0) |
| 231 | printf("securelevel_modcmd::fini: secmodel_deregister " |
| 232 | "returned %d\n" , error); |
| 233 | |
| 234 | break; |
| 235 | |
| 236 | case MODULE_CMD_AUTOUNLOAD: |
| 237 | error = EPERM; |
| 238 | break; |
| 239 | |
| 240 | default: |
| 241 | error = ENOTTY; |
| 242 | break; |
| 243 | } |
| 244 | |
| 245 | return (error); |
| 246 | } |
| 247 | |
| 248 | /* |
| 249 | * kauth(9) listener |
| 250 | * |
| 251 | * Security model: Traditional NetBSD |
| 252 | * Scope: System |
| 253 | * Responsibility: Securelevel |
| 254 | */ |
| 255 | int |
| 256 | secmodel_securelevel_system_cb(kauth_cred_t cred, kauth_action_t action, |
| 257 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 258 | { |
| 259 | int result; |
| 260 | enum kauth_system_req req; |
| 261 | |
| 262 | result = KAUTH_RESULT_DEFER; |
| 263 | req = (enum kauth_system_req)arg0; |
| 264 | |
| 265 | switch (action) { |
| 266 | case KAUTH_SYSTEM_CHSYSFLAGS: |
| 267 | /* Deprecated. */ |
| 268 | if (securelevel > 0) |
| 269 | result = KAUTH_RESULT_DENY; |
| 270 | break; |
| 271 | |
| 272 | case KAUTH_SYSTEM_TIME: |
| 273 | switch (req) { |
| 274 | case KAUTH_REQ_SYSTEM_TIME_RTCOFFSET: |
| 275 | if (securelevel > 0) |
| 276 | result = KAUTH_RESULT_DENY; |
| 277 | break; |
| 278 | |
| 279 | case KAUTH_REQ_SYSTEM_TIME_SYSTEM: { |
| 280 | struct timespec *ts = arg1; |
| 281 | struct timespec *delta = arg2; |
| 282 | |
| 283 | if (securelevel > 1 && time_wraps(ts, delta)) |
| 284 | result = KAUTH_RESULT_DENY; |
| 285 | |
| 286 | break; |
| 287 | } |
| 288 | |
| 289 | default: |
| 290 | break; |
| 291 | } |
| 292 | break; |
| 293 | |
| 294 | case KAUTH_SYSTEM_MAP_VA_ZERO: |
| 295 | if (securelevel > 0) |
| 296 | result = KAUTH_RESULT_DENY; |
| 297 | break; |
| 298 | |
| 299 | case KAUTH_SYSTEM_MODULE: |
| 300 | if (securelevel > 0) |
| 301 | result = KAUTH_RESULT_DENY; |
| 302 | break; |
| 303 | |
| 304 | case KAUTH_SYSTEM_MOUNT: |
| 305 | switch (req) { |
| 306 | case KAUTH_REQ_SYSTEM_MOUNT_NEW: |
| 307 | if (securelevel > 1) |
| 308 | result = KAUTH_RESULT_DENY; |
| 309 | |
| 310 | break; |
| 311 | |
| 312 | case KAUTH_REQ_SYSTEM_MOUNT_UPDATE: |
| 313 | if (securelevel > 1) { |
| 314 | struct mount *mp = arg1; |
| 315 | u_long flags = (u_long)arg2; |
| 316 | |
| 317 | /* Can only degrade from read/write to read-only. */ |
| 318 | if (flags != (mp->mnt_flag | MNT_RDONLY | MNT_RELOAD | |
| 319 | MNT_FORCE | MNT_UPDATE)) |
| 320 | result = KAUTH_RESULT_DENY; |
| 321 | } |
| 322 | |
| 323 | break; |
| 324 | |
| 325 | default: |
| 326 | break; |
| 327 | } |
| 328 | |
| 329 | break; |
| 330 | |
| 331 | case KAUTH_SYSTEM_SYSCTL: |
| 332 | switch (req) { |
| 333 | case KAUTH_REQ_SYSTEM_SYSCTL_ADD: |
| 334 | case KAUTH_REQ_SYSTEM_SYSCTL_DELETE: |
| 335 | case KAUTH_REQ_SYSTEM_SYSCTL_DESC: |
| 336 | if (securelevel > 0) |
| 337 | result = KAUTH_RESULT_DENY; |
| 338 | break; |
| 339 | |
| 340 | default: |
| 341 | break; |
| 342 | } |
| 343 | break; |
| 344 | |
| 345 | case KAUTH_SYSTEM_SETIDCORE: |
| 346 | if (securelevel > 0) |
| 347 | result = KAUTH_RESULT_DENY; |
| 348 | break; |
| 349 | |
| 350 | case KAUTH_SYSTEM_DEBUG: |
| 351 | switch (req) { |
| 352 | case KAUTH_REQ_SYSTEM_DEBUG_IPKDB: |
| 353 | if (securelevel > 0) |
| 354 | result = KAUTH_RESULT_DENY; |
| 355 | break; |
| 356 | |
| 357 | default: |
| 358 | break; |
| 359 | } |
| 360 | break; |
| 361 | |
| 362 | default: |
| 363 | break; |
| 364 | } |
| 365 | |
| 366 | return (result); |
| 367 | } |
| 368 | |
| 369 | /* |
| 370 | * kauth(9) listener |
| 371 | * |
| 372 | * Security model: Traditional NetBSD |
| 373 | * Scope: Process |
| 374 | * Responsibility: Securelevel |
| 375 | */ |
| 376 | int |
| 377 | secmodel_securelevel_process_cb(kauth_cred_t cred, kauth_action_t action, |
| 378 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 379 | { |
| 380 | struct proc *p; |
| 381 | int result; |
| 382 | |
| 383 | result = KAUTH_RESULT_DEFER; |
| 384 | p = arg0; |
| 385 | |
| 386 | switch (action) { |
| 387 | case KAUTH_PROCESS_PROCFS: { |
| 388 | enum kauth_process_req req; |
| 389 | |
| 390 | req = (enum kauth_process_req)arg2; |
| 391 | switch (req) { |
| 392 | case KAUTH_REQ_PROCESS_PROCFS_READ: |
| 393 | break; |
| 394 | |
| 395 | case KAUTH_REQ_PROCESS_PROCFS_RW: |
| 396 | case KAUTH_REQ_PROCESS_PROCFS_WRITE: |
| 397 | if ((p == initproc) && (securelevel > -1)) |
| 398 | result = KAUTH_RESULT_DENY; |
| 399 | |
| 400 | break; |
| 401 | |
| 402 | default: |
| 403 | break; |
| 404 | } |
| 405 | |
| 406 | break; |
| 407 | } |
| 408 | |
| 409 | case KAUTH_PROCESS_PTRACE: |
| 410 | if ((p == initproc) && (securelevel > -1)) |
| 411 | result = KAUTH_RESULT_DENY; |
| 412 | |
| 413 | break; |
| 414 | |
| 415 | case KAUTH_PROCESS_CORENAME: |
| 416 | if (securelevel > 1) |
| 417 | result = KAUTH_RESULT_DENY; |
| 418 | break; |
| 419 | |
| 420 | default: |
| 421 | break; |
| 422 | } |
| 423 | |
| 424 | return (result); |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * kauth(9) listener |
| 429 | * |
| 430 | * Security model: Traditional NetBSD |
| 431 | * Scope: Network |
| 432 | * Responsibility: Securelevel |
| 433 | */ |
| 434 | int |
| 435 | secmodel_securelevel_network_cb(kauth_cred_t cred, kauth_action_t action, |
| 436 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 437 | { |
| 438 | int result; |
| 439 | enum kauth_network_req req; |
| 440 | |
| 441 | result = KAUTH_RESULT_DEFER; |
| 442 | req = (enum kauth_network_req)arg0; |
| 443 | |
| 444 | switch (action) { |
| 445 | case KAUTH_NETWORK_FIREWALL: |
| 446 | switch (req) { |
| 447 | case KAUTH_REQ_NETWORK_FIREWALL_FW: |
| 448 | case KAUTH_REQ_NETWORK_FIREWALL_NAT: |
| 449 | if (securelevel > 1) |
| 450 | result = KAUTH_RESULT_DENY; |
| 451 | break; |
| 452 | |
| 453 | default: |
| 454 | break; |
| 455 | } |
| 456 | break; |
| 457 | |
| 458 | case KAUTH_NETWORK_FORWSRCRT: |
| 459 | if (securelevel > 0) |
| 460 | result = KAUTH_RESULT_DENY; |
| 461 | break; |
| 462 | |
| 463 | default: |
| 464 | break; |
| 465 | } |
| 466 | |
| 467 | return (result); |
| 468 | } |
| 469 | |
| 470 | /* |
| 471 | * kauth(9) listener |
| 472 | * |
| 473 | * Security model: Traditional NetBSD |
| 474 | * Scope: Machdep |
| 475 | * Responsibility: Securelevel |
| 476 | */ |
| 477 | int |
| 478 | secmodel_securelevel_machdep_cb(kauth_cred_t cred, kauth_action_t action, |
| 479 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 480 | { |
| 481 | int result; |
| 482 | |
| 483 | result = KAUTH_RESULT_DEFER; |
| 484 | |
| 485 | switch (action) { |
| 486 | case KAUTH_MACHDEP_IOPERM_SET: |
| 487 | case KAUTH_MACHDEP_IOPL: |
| 488 | if (securelevel > 0) |
| 489 | result = KAUTH_RESULT_DENY; |
| 490 | break; |
| 491 | |
| 492 | case KAUTH_MACHDEP_UNMANAGEDMEM: |
| 493 | if (securelevel > 0) |
| 494 | result = KAUTH_RESULT_DENY; |
| 495 | break; |
| 496 | |
| 497 | case KAUTH_MACHDEP_CPU_UCODE_APPLY: |
| 498 | if (securelevel > 1) |
| 499 | result = KAUTH_RESULT_DENY; |
| 500 | break; |
| 501 | |
| 502 | default: |
| 503 | break; |
| 504 | } |
| 505 | |
| 506 | return (result); |
| 507 | } |
| 508 | |
| 509 | /* |
| 510 | * kauth(9) listener |
| 511 | * |
| 512 | * Security model: Traditional NetBSD |
| 513 | * Scope: Device |
| 514 | * Responsibility: Securelevel |
| 515 | */ |
| 516 | int |
| 517 | secmodel_securelevel_device_cb(kauth_cred_t cred, kauth_action_t action, |
| 518 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 519 | { |
| 520 | int result; |
| 521 | |
| 522 | result = KAUTH_RESULT_DEFER; |
| 523 | |
| 524 | switch (action) { |
| 525 | case KAUTH_DEVICE_RAWIO_SPEC: { |
| 526 | struct vnode *vp; |
| 527 | enum kauth_device_req req; |
| 528 | |
| 529 | req = (enum kauth_device_req)arg0; |
| 530 | vp = arg1; |
| 531 | |
| 532 | KASSERT(vp != NULL); |
| 533 | |
| 534 | /* Handle /dev/mem and /dev/kmem. */ |
| 535 | if (iskmemvp(vp)) { |
| 536 | switch (req) { |
| 537 | case KAUTH_REQ_DEVICE_RAWIO_SPEC_READ: |
| 538 | break; |
| 539 | |
| 540 | case KAUTH_REQ_DEVICE_RAWIO_SPEC_WRITE: |
| 541 | case KAUTH_REQ_DEVICE_RAWIO_SPEC_RW: |
| 542 | if (securelevel > 0) |
| 543 | result = KAUTH_RESULT_DENY; |
| 544 | |
| 545 | break; |
| 546 | |
| 547 | default: |
| 548 | break; |
| 549 | } |
| 550 | |
| 551 | break; |
| 552 | } |
| 553 | |
| 554 | switch (req) { |
| 555 | case KAUTH_REQ_DEVICE_RAWIO_SPEC_READ: |
| 556 | break; |
| 557 | |
| 558 | case KAUTH_REQ_DEVICE_RAWIO_SPEC_WRITE: |
| 559 | case KAUTH_REQ_DEVICE_RAWIO_SPEC_RW: { |
| 560 | int error; |
| 561 | |
| 562 | error = rawdev_mounted(vp, NULL); |
| 563 | |
| 564 | /* Not a disk. */ |
| 565 | if (error == EINVAL) |
| 566 | break; |
| 567 | |
| 568 | if (error && securelevel > 0) |
| 569 | result = KAUTH_RESULT_DENY; |
| 570 | |
| 571 | if (securelevel > 1) |
| 572 | result = KAUTH_RESULT_DENY; |
| 573 | |
| 574 | break; |
| 575 | } |
| 576 | |
| 577 | default: |
| 578 | break; |
| 579 | } |
| 580 | |
| 581 | break; |
| 582 | } |
| 583 | |
| 584 | case KAUTH_DEVICE_RAWIO_PASSTHRU: |
| 585 | if (securelevel > 0) { |
| 586 | u_long bits; |
| 587 | |
| 588 | bits = (u_long)arg0; |
| 589 | |
| 590 | KASSERT(bits != 0); |
| 591 | KASSERT((bits & ~KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_ALL) == 0); |
| 592 | |
| 593 | if (bits & ~KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READCONF) |
| 594 | result = KAUTH_RESULT_DENY; |
| 595 | } |
| 596 | |
| 597 | break; |
| 598 | |
| 599 | case KAUTH_DEVICE_GPIO_PINSET: |
| 600 | if (securelevel > 0) |
| 601 | result = KAUTH_RESULT_DENY; |
| 602 | break; |
| 603 | |
| 604 | case KAUTH_DEVICE_RND_ADDDATA_ESTIMATE: |
| 605 | if (securelevel > 0) |
| 606 | result = KAUTH_RESULT_DENY; |
| 607 | break; |
| 608 | |
| 609 | default: |
| 610 | break; |
| 611 | } |
| 612 | |
| 613 | return (result); |
| 614 | } |
| 615 | |
| 616 | int |
| 617 | secmodel_securelevel_vnode_cb(kauth_cred_t cred, kauth_action_t action, |
| 618 | void *cookie, void *arg0, void *arg1, void *arg2, void *arg3) |
| 619 | { |
| 620 | int result; |
| 621 | |
| 622 | result = KAUTH_RESULT_DEFER; |
| 623 | |
| 624 | if ((action & KAUTH_VNODE_WRITE_SYSFLAGS) && |
| 625 | (action & KAUTH_VNODE_HAS_SYSFLAGS)) { |
| 626 | if (securelevel > 0) |
| 627 | result = KAUTH_RESULT_DENY; |
| 628 | } |
| 629 | |
| 630 | return (result); |
| 631 | } |
| 632 | |
| 633 | |