ugidfw_system.c revision 148482
1252190Srpaulo/*- 2252190Srpaulo * Copyright (c) 2005 Tom Rhodes 3252190Srpaulo * Copyright (c) 1999-2002 Robert N. M. Watson 4252190Srpaulo * Copyright (c) 2001-2005 Networks Associates Technology, Inc. 5252190Srpaulo * All rights reserved. 6252190Srpaulo * 7252190Srpaulo * This software was developed by Robert Watson for the TrustedBSD Project. 8252190Srpaulo * It was later enhanced by Tom Rhodes for the TrustedBSD Project. 9252190Srpaulo * 10252190Srpaulo * This software was developed for the FreeBSD Project in part by Network 11252190Srpaulo * Associates Laboratories, the Security Research Division of Network 12252190Srpaulo * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 13252190Srpaulo * as part of the DARPA CHATS research program. 14252190Srpaulo * 15252190Srpaulo * Redistribution and use in source and binary forms, with or without 16252190Srpaulo * modification, are permitted provided that the following conditions 17252190Srpaulo * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $FreeBSD: head/sys/security/mac_bsdextended/mac_bsdextended.c 148482 2005-07-28 13:55:12Z trhodes $ 37 */ 38 39/* 40 * Developed by the TrustedBSD Project. 41 * "BSD Extended" MAC policy, allowing the administrator to impose 42 * mandatory rules regarding users and some system objects. 43 */ 44 45#include <sys/types.h> 46#include <sys/param.h> 47#include <sys/acl.h> 48#include <sys/conf.h> 49#include <sys/kernel.h> 50#include <sys/lock.h> 51#include <sys/mac.h> 52#include <sys/malloc.h> 53#include <sys/mount.h> 54#include <sys/mutex.h> 55#include <sys/proc.h> 56#include <sys/systm.h> 57#include <sys/sysproto.h> 58#include <sys/sysent.h> 59#include <sys/vnode.h> 60#include <sys/file.h> 61#include <sys/socket.h> 62#include <sys/socketvar.h> 63#include <sys/sysctl.h> 64#include <sys/syslog.h> 65 66#include <net/bpfdesc.h> 67#include <net/if.h> 68#include <net/if_types.h> 69#include <net/if_var.h> 70 71#include <vm/vm.h> 72 73#include <sys/mac_policy.h> 74 75#include <security/mac_bsdextended/mac_bsdextended.h> 76 77static struct mtx mac_bsdextended_mtx; 78 79SYSCTL_DECL(_security_mac); 80 81SYSCTL_NODE(_security_mac, OID_AUTO, bsdextended, CTLFLAG_RW, 0, 82 "TrustedBSD extended BSD MAC policy controls"); 83 84static int mac_bsdextended_enabled = 1; 85SYSCTL_INT(_security_mac_bsdextended, OID_AUTO, enabled, CTLFLAG_RW, 86 &mac_bsdextended_enabled, 0, "Enforce extended BSD policy"); 87TUNABLE_INT("security.mac.bsdextended.enabled", &mac_bsdextended_enabled); 88 89MALLOC_DEFINE(M_MACBSDEXTENDED, "mac_bsdextended", "BSD Extended MAC rule"); 90 91#define MAC_BSDEXTENDED_MAXRULES 250 92static struct mac_bsdextended_rule *rules[MAC_BSDEXTENDED_MAXRULES]; 93static int rule_count = 0; 94static int rule_slots = 0; 95 96SYSCTL_INT(_security_mac_bsdextended, OID_AUTO, rule_count, CTLFLAG_RD, 97 &rule_count, 0, "Number of defined rules\n"); 98SYSCTL_INT(_security_mac_bsdextended, OID_AUTO, rule_slots, CTLFLAG_RD, 99 &rule_slots, 0, "Number of used rule slots\n"); 100 101/* 102 * This is just used for logging purposes, eventually we would like 103 * to log much more then failed requests. 104 */ 105static int mac_bsdextended_logging; 106SYSCTL_INT(_security_mac_bsdextended, OID_AUTO, logging, CTLFLAG_RW, 107 &mac_bsdextended_logging, 0, "Log failed authorization requests"); 108 109/* 110 * This tunable is here for compatibility. It will allow the user 111 * to switch between the new mode (first rule matches) and the old 112 * functionality (all rules match). 113 */ 114static int 115mac_bsdextended_firstmatch_enabled; 116SYSCTL_INT(_security_mac_bsdextended, OID_AUTO, firstmatch_enabled, 117 CTLFLAG_RW, &mac_bsdextended_firstmatch_enabled, 1, 118 "Disable/enable match first rule functionality"); 119 120static int 121mac_bsdextended_rule_valid(struct mac_bsdextended_rule *rule) 122{ 123 124 if ((rule->mbr_subject.mbi_flags | MBI_BITS) != MBI_BITS) 125 return (EINVAL); 126 127 if ((rule->mbr_object.mbi_flags | MBI_BITS) != MBI_BITS) 128 return (EINVAL); 129 130 if ((rule->mbr_mode | MBI_ALLPERM) != MBI_ALLPERM) 131 return (EINVAL); 132 133 return (0); 134} 135 136static int 137sysctl_rule(SYSCTL_HANDLER_ARGS) 138{ 139 struct mac_bsdextended_rule temprule, *ruleptr; 140 u_int namelen; 141 int error, index, *name; 142 143 error = 0; 144 name = (int *)arg1; 145 namelen = arg2; 146 147 /* printf("bsdextended sysctl handler (namelen %d)\n", namelen); */ 148 149 if (namelen != 1) 150 return (EINVAL); 151 152 index = name[0]; 153 if (index > MAC_BSDEXTENDED_MAXRULES) 154 return (ENOENT); 155 156 ruleptr = NULL; 157 if (req->newptr && req->newlen != 0) { 158 error = SYSCTL_IN(req, &temprule, sizeof(temprule)); 159 if (error) 160 return (error); 161 MALLOC(ruleptr, struct mac_bsdextended_rule *, 162 sizeof(*ruleptr), M_MACBSDEXTENDED, M_WAITOK | M_ZERO); 163 } 164 165 mtx_lock(&mac_bsdextended_mtx); 166 167 if (req->oldptr) { 168 if (index < 0 || index > rule_slots + 1) { 169 error = ENOENT; 170 goto out; 171 } 172 if (rules[index] == NULL) { 173 error = ENOENT; 174 goto out; 175 } 176 temprule = *rules[index]; 177 } 178 179 if (req->newptr && req->newlen == 0) { 180 /* printf("deletion\n"); */ 181 KASSERT(ruleptr == NULL, ("sysctl_rule: ruleptr != NULL")); 182 ruleptr = rules[index]; 183 if (ruleptr == NULL) { 184 error = ENOENT; 185 goto out; 186 } 187 rule_count--; 188 rules[index] = NULL; 189 } else if (req->newptr) { 190 error = mac_bsdextended_rule_valid(&temprule); 191 if (error) 192 goto out; 193 194 if (rules[index] == NULL) { 195 /* printf("addition\n"); */ 196 *ruleptr = temprule; 197 rules[index] = ruleptr; 198 ruleptr = NULL; 199 if (index + 1 > rule_slots) 200 rule_slots = index + 1; 201 rule_count++; 202 } else { 203 /* printf("replacement\n"); */ 204 *rules[index] = temprule; 205 } 206 } 207 208out: 209 mtx_unlock(&mac_bsdextended_mtx); 210 if (ruleptr != NULL) 211 FREE(ruleptr, M_MACBSDEXTENDED); 212 if (req->oldptr && error == 0) 213 error = SYSCTL_OUT(req, &temprule, sizeof(temprule)); 214 215 return (error); 216} 217 218SYSCTL_NODE(_security_mac_bsdextended, OID_AUTO, rules, 219 CTLFLAG_RW, sysctl_rule, "BSD extended MAC rules"); 220 221static void 222mac_bsdextended_init(struct mac_policy_conf *mpc) 223{ 224 225 /* Initialize ruleset lock. */ 226 mtx_init(&mac_bsdextended_mtx, "mac_bsdextended lock", NULL, MTX_DEF); 227 228 /* Register dynamic sysctl's for rules. */ 229} 230 231static void 232mac_bsdextended_destroy(struct mac_policy_conf *mpc) 233{ 234 235 /* Destroy ruleset lock. */ 236 mtx_destroy(&mac_bsdextended_mtx); 237 238 /* Tear down sysctls. */ 239} 240 241static int 242mac_bsdextended_rulecheck(struct mac_bsdextended_rule *rule, 243 struct ucred *cred, uid_t object_uid, gid_t object_gid, int acc_mode) 244{ 245 int match; 246 247 /* 248 * Is there a subject match? 249 */ 250 mtx_assert(&mac_bsdextended_mtx, MA_OWNED); 251 if (rule->mbr_subject.mbi_flags & MBI_UID_DEFINED) { 252 match = (rule->mbr_subject.mbi_uid == cred->cr_uid || 253 rule->mbr_subject.mbi_uid == cred->cr_ruid || 254 rule->mbr_subject.mbi_uid == cred->cr_svuid); 255 256 if (rule->mbr_subject.mbi_flags & MBI_NEGATED) 257 match = !match; 258 259 if (!match) 260 return (0); 261 } 262 263 if (rule->mbr_subject.mbi_flags & MBI_GID_DEFINED) { 264 match = (groupmember(rule->mbr_subject.mbi_gid, cred) || 265 rule->mbr_subject.mbi_gid == cred->cr_rgid || 266 rule->mbr_subject.mbi_gid == cred->cr_svgid); 267 268 if (rule->mbr_subject.mbi_flags & MBI_NEGATED) 269 match = !match; 270 271 if (!match) 272 return (0); 273 } 274 275 /* 276 * Is there an object match? 277 */ 278 if (rule->mbr_object.mbi_flags & MBI_UID_DEFINED) { 279 match = (rule->mbr_object.mbi_uid == object_uid); 280 281 if (rule->mbr_object.mbi_flags & MBI_NEGATED) 282 match = !match; 283 284 if (!match) 285 return (0); 286 } 287 288 if (rule->mbr_object.mbi_flags & MBI_GID_DEFINED) { 289 match = (rule->mbr_object.mbi_gid == object_gid); 290 291 if (rule->mbr_object.mbi_flags & MBI_NEGATED) 292 match = !match; 293 294 if (!match) 295 return (0); 296 } 297 298 /* 299 * Is the access permitted? 300 */ 301 if ((rule->mbr_mode & acc_mode) != acc_mode) { 302 if (mac_bsdextended_logging) 303 log(LOG_AUTHPRIV, "mac_bsdextended: %d:%d request %d" 304 " on %d:%d failed. \n", cred->cr_ruid, 305 cred->cr_rgid, acc_mode, object_uid, object_gid); 306 return (EACCES); /* Matching rule denies access */ 307 } 308 309 /* 310 * If the rule matched, permits access, and first match is enabled, 311 * return success. 312 */ 313 if (mac_bsdextended_firstmatch_enabled) 314 return (EJUSTRETURN); 315 else 316 return(0); 317} 318 319static int 320mac_bsdextended_check(struct ucred *cred, uid_t object_uid, gid_t object_gid, 321 int acc_mode) 322{ 323 int error, i; 324 325 if (suser_cred(cred, 0) == 0) 326 return (0); 327 328 mtx_lock(&mac_bsdextended_mtx); 329 for (i = 0; i < rule_slots; i++) { 330 if (rules[i] == NULL) 331 continue; 332 333 /* 334 * Since we do not separately handle append, map append to 335 * write. 336 */ 337 if (acc_mode & MBI_APPEND) { 338 acc_mode &= ~MBI_APPEND; 339 acc_mode |= MBI_WRITE; 340 } 341 342 error = mac_bsdextended_rulecheck(rules[i], cred, object_uid, 343 object_gid, acc_mode); 344 if (error == EJUSTRETURN) 345 break; 346 if (error) { 347 mtx_unlock(&mac_bsdextended_mtx); 348 return (error); 349 } 350 } 351 mtx_unlock(&mac_bsdextended_mtx); 352 return (0); 353} 354 355static int 356mac_bsdextended_check_system_swapon(struct ucred *cred, struct vnode *vp, 357 struct label *label) 358{ 359 struct vattr vap; 360 int error; 361 362 if (!mac_bsdextended_enabled) 363 return (0); 364 365 error = VOP_GETATTR(vp, &vap, cred, curthread); 366 if (error) 367 return (error); 368 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 369 MBI_WRITE)); 370} 371 372static int 373mac_bsdextended_check_vnode_access(struct ucred *cred, struct vnode *vp, 374 struct label *label, int acc_mode) 375{ 376 struct vattr vap; 377 int error; 378 379 if (!mac_bsdextended_enabled) 380 return (0); 381 382 error = VOP_GETATTR(vp, &vap, cred, curthread); 383 if (error) 384 return (error); 385 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, acc_mode)); 386} 387 388static int 389mac_bsdextended_check_vnode_chdir(struct ucred *cred, struct vnode *dvp, 390 struct label *dlabel) 391{ 392 struct vattr vap; 393 int error; 394 395 if (!mac_bsdextended_enabled) 396 return (0); 397 398 error = VOP_GETATTR(dvp, &vap, cred, curthread); 399 if (error) 400 return (error); 401 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 402 MBI_EXEC)); 403} 404 405static int 406mac_bsdextended_check_vnode_chroot(struct ucred *cred, struct vnode *dvp, 407 struct label *dlabel) 408{ 409 struct vattr vap; 410 int error; 411 412 if (!mac_bsdextended_enabled) 413 return (0); 414 415 error = VOP_GETATTR(dvp, &vap, cred, curthread); 416 if (error) 417 return (error); 418 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 419 MBI_EXEC)); 420} 421 422static int 423mac_bsdextended_check_create_vnode(struct ucred *cred, struct vnode *dvp, 424 struct label *dlabel, struct componentname *cnp, struct vattr *vap) 425{ 426 struct vattr dvap; 427 int error; 428 429 if (!mac_bsdextended_enabled) 430 return (0); 431 432 error = VOP_GETATTR(dvp, &dvap, cred, curthread); 433 if (error) 434 return (error); 435 return (mac_bsdextended_check(cred, dvap.va_uid, dvap.va_gid, 436 MBI_WRITE)); 437} 438 439static int 440mac_bsdextended_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 441 struct label *dlabel, struct vnode *vp, struct label *label, 442 struct componentname *cnp) 443{ 444 struct vattr vap; 445 int error; 446 447 if (!mac_bsdextended_enabled) 448 return (0); 449 450 error = VOP_GETATTR(dvp, &vap, cred, curthread); 451 if (error) 452 return (error); 453 error = mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 454 MBI_WRITE); 455 if (error) 456 return (error); 457 458 error = VOP_GETATTR(vp, &vap, cred, curthread); 459 if (error) 460 return (error); 461 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 462 MBI_WRITE)); 463} 464 465static int 466mac_bsdextended_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 467 struct label *label, acl_type_t type) 468{ 469 struct vattr vap; 470 int error; 471 472 if (!mac_bsdextended_enabled) 473 return (0); 474 475 error = VOP_GETATTR(vp, &vap, cred, curthread); 476 if (error) 477 return (error); 478 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 479 MBI_ADMIN)); 480} 481 482static int 483mac_bsdextended_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp, 484 struct label *label, int attrnamespace, const char *name) 485{ 486 struct vattr vap; 487 int error; 488 489 if (!mac_bsdextended_enabled) 490 return (0); 491 492 error = VOP_GETATTR(vp, &vap, cred, curthread); 493 if (error) 494 return (error); 495 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 496 MBI_WRITE)); 497} 498 499static int 500mac_bsdextended_check_vnode_exec(struct ucred *cred, struct vnode *vp, 501 struct label *label, struct image_params *imgp, 502 struct label *execlabel) 503{ 504 struct vattr vap; 505 int error; 506 507 if (!mac_bsdextended_enabled) 508 return (0); 509 510 error = VOP_GETATTR(vp, &vap, cred, curthread); 511 if (error) 512 return (error); 513 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 514 MBI_READ|MBI_EXEC)); 515} 516 517static int 518mac_bsdextended_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 519 struct label *label, acl_type_t type) 520{ 521 struct vattr vap; 522 int error; 523 524 if (!mac_bsdextended_enabled) 525 return (0); 526 527 error = VOP_GETATTR(vp, &vap, cred, curthread); 528 if (error) 529 return (error); 530 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 531 MBI_STAT)); 532} 533 534static int 535mac_bsdextended_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 536 struct label *label, int attrnamespace, const char *name, struct uio *uio) 537{ 538 struct vattr vap; 539 int error; 540 541 if (!mac_bsdextended_enabled) 542 return (0); 543 544 error = VOP_GETATTR(vp, &vap, cred, curthread); 545 if (error) 546 return (error); 547 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 548 MBI_READ)); 549} 550 551static int 552mac_bsdextended_check_vnode_link(struct ucred *cred, struct vnode *dvp, 553 struct label *dlabel, struct vnode *vp, struct label *label, 554 struct componentname *cnp) 555{ 556 struct vattr vap; 557 int error; 558 559 if (!mac_bsdextended_enabled) 560 return (0); 561 562 error = VOP_GETATTR(dvp, &vap, cred, curthread); 563 if (error) 564 return (error); 565 error = mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 566 MBI_WRITE); 567 if (error) 568 return (error); 569 570 error = VOP_GETATTR(vp, &vap, cred, curthread); 571 if (error) 572 return (error); 573 error = mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 574 MBI_WRITE); 575 if (error) 576 return (error); 577 return (0); 578} 579 580static int 581mac_bsdextended_check_vnode_listextattr(struct ucred *cred, struct vnode *vp, 582 struct label *label, int attrnamespace) 583{ 584 struct vattr vap; 585 int error; 586 587 if (!mac_bsdextended_enabled) 588 return (0); 589 590 error = VOP_GETATTR(vp, &vap, cred, curthread); 591 if (error) 592 return (error); 593 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 594 MBI_READ)); 595} 596 597static int 598mac_bsdextended_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 599 struct label *dlabel, struct componentname *cnp) 600{ 601 struct vattr vap; 602 int error; 603 604 if (!mac_bsdextended_enabled) 605 return (0); 606 607 error = VOP_GETATTR(dvp, &vap, cred, curthread); 608 if (error) 609 return (error); 610 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 611 MBI_EXEC)); 612} 613 614static int 615mac_bsdextended_check_vnode_open(struct ucred *cred, struct vnode *vp, 616 struct label *filelabel, int acc_mode) 617{ 618 struct vattr vap; 619 int error; 620 621 if (!mac_bsdextended_enabled) 622 return (0); 623 624 error = VOP_GETATTR(vp, &vap, cred, curthread); 625 if (error) 626 return (error); 627 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, acc_mode)); 628} 629 630static int 631mac_bsdextended_check_vnode_readdir(struct ucred *cred, struct vnode *dvp, 632 struct label *dlabel) 633{ 634 struct vattr vap; 635 int error; 636 637 if (!mac_bsdextended_enabled) 638 return (0); 639 640 error = VOP_GETATTR(dvp, &vap, cred, curthread); 641 if (error) 642 return (error); 643 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 644 MBI_READ)); 645} 646 647static int 648mac_bsdextended_check_vnode_readdlink(struct ucred *cred, struct vnode *vp, 649 struct label *label) 650{ 651 struct vattr vap; 652 int error; 653 654 if (!mac_bsdextended_enabled) 655 return (0); 656 657 error = VOP_GETATTR(vp, &vap, cred, curthread); 658 if (error) 659 return (error); 660 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 661 MBI_READ)); 662} 663 664static int 665mac_bsdextended_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 666 struct label *dlabel, struct vnode *vp, struct label *label, 667 struct componentname *cnp) 668{ 669 struct vattr vap; 670 int error; 671 672 if (!mac_bsdextended_enabled) 673 return (0); 674 675 error = VOP_GETATTR(dvp, &vap, cred, curthread); 676 if (error) 677 return (error); 678 error = mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 679 MBI_WRITE); 680 if (error) 681 return (error); 682 error = VOP_GETATTR(vp, &vap, cred, curthread); 683 if (error) 684 return (error); 685 error = mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 686 MBI_WRITE); 687 688 return (error); 689} 690 691static int 692mac_bsdextended_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 693 struct label *dlabel, struct vnode *vp, struct label *label, int samedir, 694 struct componentname *cnp) 695{ 696 struct vattr vap; 697 int error; 698 699 if (!mac_bsdextended_enabled) 700 return (0); 701 702 error = VOP_GETATTR(dvp, &vap, cred, curthread); 703 if (error) 704 return (error); 705 error = mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 706 MBI_WRITE); 707 if (error) 708 return (error); 709 710 if (vp != NULL) { 711 error = VOP_GETATTR(vp, &vap, cred, curthread); 712 if (error) 713 return (error); 714 error = mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 715 MBI_WRITE); 716 } 717 718 return (error); 719} 720 721static int 722mac_bsdextended_check_vnode_revoke(struct ucred *cred, struct vnode *vp, 723 struct label *label) 724{ 725 struct vattr vap; 726 int error; 727 728 if (!mac_bsdextended_enabled) 729 return (0); 730 731 error = VOP_GETATTR(vp, &vap, cred, curthread); 732 if (error) 733 return (error); 734 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 735 MBI_ADMIN)); 736} 737 738static int 739mac_bsdextended_check_setacl_vnode(struct ucred *cred, struct vnode *vp, 740 struct label *label, acl_type_t type, struct acl *acl) 741{ 742 struct vattr vap; 743 int error; 744 745 if (!mac_bsdextended_enabled) 746 return (0); 747 748 error = VOP_GETATTR(vp, &vap, cred, curthread); 749 if (error) 750 return (error); 751 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 752 MBI_ADMIN)); 753} 754 755static int 756mac_bsdextended_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 757 struct label *label, int attrnamespace, const char *name, struct uio *uio) 758{ 759 struct vattr vap; 760 int error; 761 762 if (!mac_bsdextended_enabled) 763 return (0); 764 765 error = VOP_GETATTR(vp, &vap, cred, curthread); 766 if (error) 767 return (error); 768 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 769 MBI_WRITE)); 770} 771 772static int 773mac_bsdextended_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 774 struct label *label, u_long flags) 775{ 776 struct vattr vap; 777 int error; 778 779 if (!mac_bsdextended_enabled) 780 return (0); 781 782 error = VOP_GETATTR(vp, &vap, cred, curthread); 783 if (error) 784 return (error); 785 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 786 MBI_ADMIN)); 787} 788 789static int 790mac_bsdextended_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 791 struct label *label, mode_t mode) 792{ 793 struct vattr vap; 794 int error; 795 796 if (!mac_bsdextended_enabled) 797 return (0); 798 799 error = VOP_GETATTR(vp, &vap, cred, curthread); 800 if (error) 801 return (error); 802 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 803 MBI_ADMIN)); 804} 805 806static int 807mac_bsdextended_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 808 struct label *label, uid_t uid, gid_t gid) 809{ 810 struct vattr vap; 811 int error; 812 813 if (!mac_bsdextended_enabled) 814 return (0); 815 816 error = VOP_GETATTR(vp, &vap, cred, curthread); 817 if (error) 818 return (error); 819 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 820 MBI_ADMIN)); 821} 822 823static int 824mac_bsdextended_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 825 struct label *label, struct timespec atime, struct timespec utime) 826{ 827 struct vattr vap; 828 int error; 829 830 if (!mac_bsdextended_enabled) 831 return (0); 832 833 error = VOP_GETATTR(vp, &vap, cred, curthread); 834 if (error) 835 return (error); 836 return (mac_bsdextended_check(cred, vap.va_uid, vap.va_gid, 837 MBI_ADMIN)); 838} 839 840static int 841mac_bsdextended_check_vnode_stat(struct ucred *active_cred, 842 struct ucred *file_cred, struct vnode *vp, struct label *label) 843{ 844 struct vattr vap; 845 int error; 846 847 if (!mac_bsdextended_enabled) 848 return (0); 849 850 error = VOP_GETATTR(vp, &vap, active_cred, curthread); 851 if (error) 852 return (error); 853 return (mac_bsdextended_check(active_cred, vap.va_uid, vap.va_gid, 854 MBI_STAT)); 855} 856 857static struct mac_policy_ops mac_bsdextended_ops = 858{ 859 .mpo_destroy = mac_bsdextended_destroy, 860 .mpo_init = mac_bsdextended_init, 861 .mpo_check_system_swapon = mac_bsdextended_check_system_swapon, 862 .mpo_check_vnode_access = mac_bsdextended_check_vnode_access, 863 .mpo_check_vnode_chdir = mac_bsdextended_check_vnode_chdir, 864 .mpo_check_vnode_chroot = mac_bsdextended_check_vnode_chroot, 865 .mpo_check_vnode_create = mac_bsdextended_check_create_vnode, 866 .mpo_check_vnode_delete = mac_bsdextended_check_vnode_delete, 867 .mpo_check_vnode_deleteacl = mac_bsdextended_check_vnode_deleteacl, 868 .mpo_check_vnode_deleteextattr = mac_bsdextended_check_vnode_deleteextattr, 869 .mpo_check_vnode_exec = mac_bsdextended_check_vnode_exec, 870 .mpo_check_vnode_getacl = mac_bsdextended_check_vnode_getacl, 871 .mpo_check_vnode_getextattr = mac_bsdextended_check_vnode_getextattr, 872 .mpo_check_vnode_link = mac_bsdextended_check_vnode_link, 873 .mpo_check_vnode_listextattr = mac_bsdextended_check_vnode_listextattr, 874 .mpo_check_vnode_lookup = mac_bsdextended_check_vnode_lookup, 875 .mpo_check_vnode_open = mac_bsdextended_check_vnode_open, 876 .mpo_check_vnode_readdir = mac_bsdextended_check_vnode_readdir, 877 .mpo_check_vnode_readlink = mac_bsdextended_check_vnode_readdlink, 878 .mpo_check_vnode_rename_from = mac_bsdextended_check_vnode_rename_from, 879 .mpo_check_vnode_rename_to = mac_bsdextended_check_vnode_rename_to, 880 .mpo_check_vnode_revoke = mac_bsdextended_check_vnode_revoke, 881 .mpo_check_vnode_setacl = mac_bsdextended_check_setacl_vnode, 882 .mpo_check_vnode_setextattr = mac_bsdextended_check_vnode_setextattr, 883 .mpo_check_vnode_setflags = mac_bsdextended_check_vnode_setflags, 884 .mpo_check_vnode_setmode = mac_bsdextended_check_vnode_setmode, 885 .mpo_check_vnode_setowner = mac_bsdextended_check_vnode_setowner, 886 .mpo_check_vnode_setutimes = mac_bsdextended_check_vnode_setutimes, 887 .mpo_check_vnode_stat = mac_bsdextended_check_vnode_stat, 888}; 889 890MAC_POLICY_SET(&mac_bsdextended_ops, mac_bsdextended, 891 "TrustedBSD MAC/BSD Extended", MPC_LOADTIME_FLAG_UNLOADOK, NULL); 892