ugidfw_system.c revision 182905
1101099Srwatson/*- 2166905Srwatson * Copyright (c) 1999-2002, 2007 Robert N. M. Watson 3145412Strhodes * Copyright (c) 2001-2005 Networks Associates Technology, Inc. 4171253Srwatson * Copyright (c) 2005 Tom Rhodes 5172930Srwatson * Copyright (c) 2006 SPARTA, Inc. 6101099Srwatson * All rights reserved. 7101099Srwatson * 8101099Srwatson * This software was developed by Robert Watson for the TrustedBSD Project. 9145412Strhodes * It was later enhanced by Tom Rhodes for the TrustedBSD Project. 10101099Srwatson * 11106393Srwatson * This software was developed for the FreeBSD Project in part by Network 12106393Srwatson * Associates Laboratories, the Security Research Division of Network 13106393Srwatson * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 14106393Srwatson * as part of the DARPA CHATS research program. 15101099Srwatson * 16172930Srwatson * This software was enhanced by SPARTA ISSO under SPAWAR contract 17172930Srwatson * N66001-04-C-6019 ("SEFOS"). 18172930Srwatson * 19101099Srwatson * Redistribution and use in source and binary forms, with or without 20101099Srwatson * modification, are permitted provided that the following conditions 21101099Srwatson * are met: 22101099Srwatson * 1. Redistributions of source code must retain the above copyright 23101099Srwatson * notice, this list of conditions and the following disclaimer. 24101099Srwatson * 2. Redistributions in binary form must reproduce the above copyright 25101099Srwatson * notice, this list of conditions and the following disclaimer in the 26101099Srwatson * documentation and/or other materials provided with the distribution. 27101099Srwatson * 28101099Srwatson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 29101099Srwatson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30101099Srwatson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31101099Srwatson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 32101099Srwatson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33101099Srwatson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34101099Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35101099Srwatson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36101099Srwatson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37101099Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38101099Srwatson * SUCH DAMAGE. 39101099Srwatson * 40101099Srwatson * $FreeBSD: head/sys/security/mac_bsdextended/mac_bsdextended.c 182905 2008-09-10 13:16:41Z trasz $ 41101099Srwatson */ 42136774Srwatson 43101099Srwatson/* 44101099Srwatson * Developed by the TrustedBSD Project. 45171253Srwatson * 46171253Srwatson * "BSD Extended" MAC policy, allowing the administrator to impose mandatory 47171253Srwatson * firewall-like rules regarding users and file system objects. 48101099Srwatson */ 49101099Srwatson 50101099Srwatson#include <sys/param.h> 51101099Srwatson#include <sys/acl.h> 52101099Srwatson#include <sys/kernel.h> 53157986Sdwmalone#include <sys/jail.h> 54145412Strhodes#include <sys/lock.h> 55101099Srwatson#include <sys/malloc.h> 56166905Srwatson#include <sys/module.h> 57101099Srwatson#include <sys/mount.h> 58145412Strhodes#include <sys/mutex.h> 59170689Srwatson#include <sys/priv.h> 60101099Srwatson#include <sys/systm.h> 61101099Srwatson#include <sys/vnode.h> 62101099Srwatson#include <sys/sysctl.h> 63134132Strhodes#include <sys/syslog.h> 64182905Strasz#include <sys/stat.h> 65101099Srwatson 66165469Srwatson#include <security/mac/mac_policy.h> 67101099Srwatson#include <security/mac_bsdextended/mac_bsdextended.h> 68101099Srwatson 69172955Srwatsonstatic struct mtx ugidfw_mtx; 70145412Strhodes 71101099SrwatsonSYSCTL_DECL(_security_mac); 72101099Srwatson 73101099SrwatsonSYSCTL_NODE(_security_mac, OID_AUTO, bsdextended, CTLFLAG_RW, 0, 74101099Srwatson "TrustedBSD extended BSD MAC policy controls"); 75101099Srwatson 76172955Srwatsonstatic int ugidfw_enabled = 1; 77101099SrwatsonSYSCTL_INT(_security_mac_bsdextended, OID_AUTO, enabled, CTLFLAG_RW, 78172955Srwatson &ugidfw_enabled, 0, "Enforce extended BSD policy"); 79172955SrwatsonTUNABLE_INT("security.mac.bsdextended.enabled", &ugidfw_enabled); 80101099Srwatson 81101099SrwatsonMALLOC_DEFINE(M_MACBSDEXTENDED, "mac_bsdextended", "BSD Extended MAC rule"); 82101099Srwatson 83101099Srwatson#define MAC_BSDEXTENDED_MAXRULES 250 84101099Srwatsonstatic struct mac_bsdextended_rule *rules[MAC_BSDEXTENDED_MAXRULES]; 85101099Srwatsonstatic int rule_count = 0; 86101099Srwatsonstatic int rule_slots = 0; 87157986Sdwmalonestatic int rule_version = MB_VERSION; 88101099Srwatson 89101099SrwatsonSYSCTL_INT(_security_mac_bsdextended, OID_AUTO, rule_count, CTLFLAG_RD, 90101099Srwatson &rule_count, 0, "Number of defined rules\n"); 91101099SrwatsonSYSCTL_INT(_security_mac_bsdextended, OID_AUTO, rule_slots, CTLFLAG_RD, 92101099Srwatson &rule_slots, 0, "Number of used rule slots\n"); 93157986SdwmaloneSYSCTL_INT(_security_mac_bsdextended, OID_AUTO, rule_version, CTLFLAG_RD, 94157986Sdwmalone &rule_version, 0, "Version number for API\n"); 95101099Srwatson 96134132Strhodes/* 97171253Srwatson * This is just used for logging purposes, eventually we would like to log 98171253Srwatson * much more then failed requests. 99134132Strhodes */ 100172955Srwatsonstatic int ugidfw_logging; 101134132StrhodesSYSCTL_INT(_security_mac_bsdextended, OID_AUTO, logging, CTLFLAG_RW, 102172955Srwatson &ugidfw_logging, 0, "Log failed authorization requests"); 103134132Strhodes 104134132Strhodes/* 105171253Srwatson * This tunable is here for compatibility. It will allow the user to switch 106171253Srwatson * between the new mode (first rule matches) and the old functionality (all 107171253Srwatson * rules match). 108134131Strhodes */ 109172955Srwatsonstatic int ugidfw_firstmatch_enabled; 110134131StrhodesSYSCTL_INT(_security_mac_bsdextended, OID_AUTO, firstmatch_enabled, 111172955Srwatson CTLFLAG_RW, &ugidfw_firstmatch_enabled, 1, 112171253Srwatson "Disable/enable match first rule functionality"); 113134131Strhodes 114134131Strhodesstatic int 115172955Srwatsonugidfw_rule_valid(struct mac_bsdextended_rule *rule) 116101099Srwatson{ 117101099Srwatson 118157986Sdwmalone if ((rule->mbr_subject.mbs_flags | MBS_ALL_FLAGS) != MBS_ALL_FLAGS) 119101099Srwatson return (EINVAL); 120157986Sdwmalone if ((rule->mbr_subject.mbs_neg | MBS_ALL_FLAGS) != MBS_ALL_FLAGS) 121101099Srwatson return (EINVAL); 122157986Sdwmalone if ((rule->mbr_object.mbo_flags | MBO_ALL_FLAGS) != MBO_ALL_FLAGS) 123157986Sdwmalone return (EINVAL); 124157986Sdwmalone if ((rule->mbr_object.mbo_neg | MBO_ALL_FLAGS) != MBO_ALL_FLAGS) 125157986Sdwmalone return (EINVAL); 126157986Sdwmalone if ((rule->mbr_object.mbo_neg | MBO_TYPE_DEFINED) && 127157986Sdwmalone (rule->mbr_object.mbo_type | MBO_ALL_TYPE) != MBO_ALL_TYPE) 128157986Sdwmalone return (EINVAL); 129136739Srwatson if ((rule->mbr_mode | MBI_ALLPERM) != MBI_ALLPERM) 130101099Srwatson return (EINVAL); 131101099Srwatson return (0); 132101099Srwatson} 133101099Srwatson 134101099Srwatsonstatic int 135101099Srwatsonsysctl_rule(SYSCTL_HANDLER_ARGS) 136101099Srwatson{ 137101099Srwatson struct mac_bsdextended_rule temprule, *ruleptr; 138101099Srwatson u_int namelen; 139101099Srwatson int error, index, *name; 140101099Srwatson 141145412Strhodes error = 0; 142101099Srwatson name = (int *)arg1; 143101099Srwatson namelen = arg2; 144101099Srwatson if (namelen != 1) 145101099Srwatson return (EINVAL); 146101099Srwatson index = name[0]; 147154386Scsjp if (index >= MAC_BSDEXTENDED_MAXRULES) 148101099Srwatson return (ENOENT); 149101099Srwatson 150145412Strhodes ruleptr = NULL; 151145412Strhodes if (req->newptr && req->newlen != 0) { 152145412Strhodes error = SYSCTL_IN(req, &temprule, sizeof(temprule)); 153101099Srwatson if (error) 154101099Srwatson return (error); 155145412Strhodes MALLOC(ruleptr, struct mac_bsdextended_rule *, 156145412Strhodes sizeof(*ruleptr), M_MACBSDEXTENDED, M_WAITOK | M_ZERO); 157101099Srwatson } 158101099Srwatson 159172955Srwatson mtx_lock(&ugidfw_mtx); 160145412Strhodes if (req->oldptr) { 161145412Strhodes if (index < 0 || index > rule_slots + 1) { 162145412Strhodes error = ENOENT; 163145412Strhodes goto out; 164101099Srwatson } 165145412Strhodes if (rules[index] == NULL) { 166145412Strhodes error = ENOENT; 167145412Strhodes goto out; 168145412Strhodes } 169145412Strhodes temprule = *rules[index]; 170145412Strhodes } 171145412Strhodes if (req->newptr && req->newlen == 0) { 172145412Strhodes KASSERT(ruleptr == NULL, ("sysctl_rule: ruleptr != NULL")); 173145412Strhodes ruleptr = rules[index]; 174145412Strhodes if (ruleptr == NULL) { 175145412Strhodes error = ENOENT; 176145412Strhodes goto out; 177145412Strhodes } 178145412Strhodes rule_count--; 179145412Strhodes rules[index] = NULL; 180145412Strhodes } else if (req->newptr) { 181172955Srwatson error = ugidfw_rule_valid(&temprule); 182101099Srwatson if (error) 183145412Strhodes goto out; 184101099Srwatson if (rules[index] == NULL) { 185101099Srwatson *ruleptr = temprule; 186101099Srwatson rules[index] = ruleptr; 187145412Strhodes ruleptr = NULL; 188145412Strhodes if (index + 1 > rule_slots) 189145412Strhodes rule_slots = index + 1; 190101099Srwatson rule_count++; 191171253Srwatson } else 192101099Srwatson *rules[index] = temprule; 193101099Srwatson } 194145412Strhodesout: 195172955Srwatson mtx_unlock(&ugidfw_mtx); 196145412Strhodes if (ruleptr != NULL) 197145412Strhodes FREE(ruleptr, M_MACBSDEXTENDED); 198148482Strhodes if (req->oldptr && error == 0) 199145412Strhodes error = SYSCTL_OUT(req, &temprule, sizeof(temprule)); 200148482Strhodes return (error); 201101099Srwatson} 202101099Srwatson 203171253SrwatsonSYSCTL_NODE(_security_mac_bsdextended, OID_AUTO, rules, CTLFLAG_RW, 204171253Srwatson sysctl_rule, "BSD extended MAC rules"); 205101099Srwatson 206101099Srwatsonstatic void 207172955Srwatsonugidfw_init(struct mac_policy_conf *mpc) 208101099Srwatson{ 209101099Srwatson 210172955Srwatson mtx_init(&ugidfw_mtx, "mac_bsdextended lock", NULL, MTX_DEF); 211101099Srwatson} 212101099Srwatson 213101099Srwatsonstatic void 214172955Srwatsonugidfw_destroy(struct mac_policy_conf *mpc) 215101099Srwatson{ 216101099Srwatson 217172955Srwatson mtx_destroy(&ugidfw_mtx); 218101099Srwatson} 219101099Srwatson 220101099Srwatsonstatic int 221172955Srwatsonugidfw_rulecheck(struct mac_bsdextended_rule *rule, 222157986Sdwmalone struct ucred *cred, struct vnode *vp, struct vattr *vap, int acc_mode) 223101099Srwatson{ 224101099Srwatson int match; 225157986Sdwmalone int i; 226101099Srwatson 227101099Srwatson /* 228101099Srwatson * Is there a subject match? 229101099Srwatson */ 230172955Srwatson mtx_assert(&ugidfw_mtx, MA_OWNED); 231157986Sdwmalone if (rule->mbr_subject.mbs_flags & MBS_UID_DEFINED) { 232157986Sdwmalone match = ((cred->cr_uid <= rule->mbr_subject.mbs_uid_max && 233157986Sdwmalone cred->cr_uid >= rule->mbr_subject.mbs_uid_min) || 234157986Sdwmalone (cred->cr_ruid <= rule->mbr_subject.mbs_uid_max && 235157986Sdwmalone cred->cr_ruid >= rule->mbr_subject.mbs_uid_min) || 236157986Sdwmalone (cred->cr_svuid <= rule->mbr_subject.mbs_uid_max && 237157986Sdwmalone cred->cr_svuid >= rule->mbr_subject.mbs_uid_min)); 238157986Sdwmalone if (rule->mbr_subject.mbs_neg & MBS_UID_DEFINED) 239101099Srwatson match = !match; 240101099Srwatson if (!match) 241101099Srwatson return (0); 242101099Srwatson } 243101099Srwatson 244157986Sdwmalone if (rule->mbr_subject.mbs_flags & MBS_GID_DEFINED) { 245157986Sdwmalone match = ((cred->cr_rgid <= rule->mbr_subject.mbs_gid_max && 246157986Sdwmalone cred->cr_rgid >= rule->mbr_subject.mbs_gid_min) || 247157986Sdwmalone (cred->cr_svgid <= rule->mbr_subject.mbs_gid_max && 248157986Sdwmalone cred->cr_svgid >= rule->mbr_subject.mbs_gid_min)); 249157986Sdwmalone if (!match) { 250171253Srwatson for (i = 0; i < cred->cr_ngroups; i++) { 251157986Sdwmalone if (cred->cr_groups[i] 252157986Sdwmalone <= rule->mbr_subject.mbs_gid_max && 253157986Sdwmalone cred->cr_groups[i] 254157986Sdwmalone >= rule->mbr_subject.mbs_gid_min) { 255157986Sdwmalone match = 1; 256157986Sdwmalone break; 257157986Sdwmalone } 258171253Srwatson } 259157986Sdwmalone } 260157986Sdwmalone if (rule->mbr_subject.mbs_neg & MBS_GID_DEFINED) 261101099Srwatson match = !match; 262101099Srwatson if (!match) 263101099Srwatson return (0); 264101099Srwatson } 265101099Srwatson 266157986Sdwmalone if (rule->mbr_subject.mbs_flags & MBS_PRISON_DEFINED) { 267157986Sdwmalone match = (cred->cr_prison != NULL && 268157986Sdwmalone cred->cr_prison->pr_id == rule->mbr_subject.mbs_prison); 269157986Sdwmalone if (rule->mbr_subject.mbs_neg & MBS_PRISON_DEFINED) 270157986Sdwmalone match = !match; 271157986Sdwmalone if (!match) 272157986Sdwmalone return (0); 273157986Sdwmalone } 274157986Sdwmalone 275101099Srwatson /* 276101099Srwatson * Is there an object match? 277101099Srwatson */ 278157986Sdwmalone if (rule->mbr_object.mbo_flags & MBO_UID_DEFINED) { 279157986Sdwmalone match = (vap->va_uid <= rule->mbr_object.mbo_uid_max && 280157986Sdwmalone vap->va_uid >= rule->mbr_object.mbo_uid_min); 281157986Sdwmalone if (rule->mbr_object.mbo_neg & MBO_UID_DEFINED) 282101099Srwatson match = !match; 283101099Srwatson if (!match) 284101099Srwatson return (0); 285101099Srwatson } 286101099Srwatson 287157986Sdwmalone if (rule->mbr_object.mbo_flags & MBO_GID_DEFINED) { 288157986Sdwmalone match = (vap->va_gid <= rule->mbr_object.mbo_gid_max && 289157986Sdwmalone vap->va_gid >= rule->mbr_object.mbo_gid_min); 290157986Sdwmalone if (rule->mbr_object.mbo_neg & MBO_GID_DEFINED) 291101099Srwatson match = !match; 292101099Srwatson if (!match) 293101099Srwatson return (0); 294101099Srwatson } 295101099Srwatson 296157986Sdwmalone if (rule->mbr_object.mbo_flags & MBO_FSID_DEFINED) { 297157986Sdwmalone match = (bcmp(&(vp->v_mount->mnt_stat.f_fsid), 298157986Sdwmalone &(rule->mbr_object.mbo_fsid), 299157986Sdwmalone sizeof(rule->mbr_object.mbo_fsid)) == 0); 300157986Sdwmalone if (rule->mbr_object.mbo_neg & MBO_FSID_DEFINED) 301157986Sdwmalone match = !match; 302157986Sdwmalone if (!match) 303171253Srwatson return (0); 304157986Sdwmalone } 305157986Sdwmalone 306157986Sdwmalone if (rule->mbr_object.mbo_flags & MBO_SUID) { 307182905Strasz match = (vap->va_mode & S_ISUID); 308157986Sdwmalone if (rule->mbr_object.mbo_neg & MBO_SUID) 309157986Sdwmalone match = !match; 310157986Sdwmalone if (!match) 311171253Srwatson return (0); 312157986Sdwmalone } 313157986Sdwmalone 314157986Sdwmalone if (rule->mbr_object.mbo_flags & MBO_SGID) { 315182905Strasz match = (vap->va_mode & S_ISGID); 316157986Sdwmalone if (rule->mbr_object.mbo_neg & MBO_SGID) 317157986Sdwmalone match = !match; 318157986Sdwmalone if (!match) 319171253Srwatson return (0); 320157986Sdwmalone } 321157986Sdwmalone 322157986Sdwmalone if (rule->mbr_object.mbo_flags & MBO_UID_SUBJECT) { 323157986Sdwmalone match = (vap->va_uid == cred->cr_uid || 324157986Sdwmalone vap->va_uid == cred->cr_ruid || 325157986Sdwmalone vap->va_uid == cred->cr_svuid); 326157986Sdwmalone if (rule->mbr_object.mbo_neg & MBO_UID_SUBJECT) 327157986Sdwmalone match = !match; 328157986Sdwmalone if (!match) 329171253Srwatson return (0); 330157986Sdwmalone } 331157986Sdwmalone 332157986Sdwmalone if (rule->mbr_object.mbo_flags & MBO_GID_SUBJECT) { 333157986Sdwmalone match = (groupmember(vap->va_gid, cred) || 334157986Sdwmalone vap->va_gid == cred->cr_rgid || 335157986Sdwmalone vap->va_gid == cred->cr_svgid); 336157986Sdwmalone if (rule->mbr_object.mbo_neg & MBO_GID_SUBJECT) 337157986Sdwmalone match = !match; 338157986Sdwmalone if (!match) 339171253Srwatson return (0); 340157986Sdwmalone } 341157986Sdwmalone 342157986Sdwmalone if (rule->mbr_object.mbo_flags & MBO_TYPE_DEFINED) { 343157986Sdwmalone switch (vap->va_type) { 344157986Sdwmalone case VREG: 345157986Sdwmalone match = (rule->mbr_object.mbo_type & MBO_TYPE_REG); 346157986Sdwmalone break; 347157986Sdwmalone case VDIR: 348157986Sdwmalone match = (rule->mbr_object.mbo_type & MBO_TYPE_DIR); 349157986Sdwmalone break; 350157986Sdwmalone case VBLK: 351157986Sdwmalone match = (rule->mbr_object.mbo_type & MBO_TYPE_BLK); 352157986Sdwmalone break; 353157986Sdwmalone case VCHR: 354157986Sdwmalone match = (rule->mbr_object.mbo_type & MBO_TYPE_CHR); 355157986Sdwmalone break; 356157986Sdwmalone case VLNK: 357157986Sdwmalone match = (rule->mbr_object.mbo_type & MBO_TYPE_LNK); 358157986Sdwmalone break; 359157986Sdwmalone case VSOCK: 360157986Sdwmalone match = (rule->mbr_object.mbo_type & MBO_TYPE_SOCK); 361157986Sdwmalone break; 362157986Sdwmalone case VFIFO: 363157986Sdwmalone match = (rule->mbr_object.mbo_type & MBO_TYPE_FIFO); 364157986Sdwmalone break; 365157986Sdwmalone default: 366157986Sdwmalone match = 0; 367157986Sdwmalone } 368157986Sdwmalone if (rule->mbr_object.mbo_neg & MBO_TYPE_DEFINED) 369157986Sdwmalone match = !match; 370157986Sdwmalone if (!match) 371171253Srwatson return (0); 372157986Sdwmalone } 373157986Sdwmalone 374101099Srwatson /* 375101099Srwatson * Is the access permitted? 376101099Srwatson */ 377101099Srwatson if ((rule->mbr_mode & acc_mode) != acc_mode) { 378172955Srwatson if (ugidfw_logging) 379134132Strhodes log(LOG_AUTHPRIV, "mac_bsdextended: %d:%d request %d" 380134132Strhodes " on %d:%d failed. \n", cred->cr_ruid, 381171253Srwatson cred->cr_rgid, acc_mode, vap->va_uid, 382171253Srwatson vap->va_gid); 383171253Srwatson return (EACCES); 384101099Srwatson } 385145412Strhodes 386134131Strhodes /* 387145412Strhodes * If the rule matched, permits access, and first match is enabled, 388145412Strhodes * return success. 389134131Strhodes */ 390172955Srwatson if (ugidfw_firstmatch_enabled) 391134131Strhodes return (EJUSTRETURN); 392134131Strhodes else 393171253Srwatson return (0); 394101099Srwatson} 395101099Srwatson 396101099Srwatsonstatic int 397172955Srwatsonugidfw_check(struct ucred *cred, struct vnode *vp, struct vattr *vap, 398106212Srwatson int acc_mode) 399101099Srwatson{ 400101099Srwatson int error, i; 401101099Srwatson 402164033Srwatson /* 403171253Srwatson * XXXRW: More specific privilege selection needed. 404164033Srwatson */ 405132563Srwatson if (suser_cred(cred, 0) == 0) 406132563Srwatson return (0); 407132563Srwatson 408166843Srwatson /* 409166843Srwatson * Since we do not separately handle append, map append to write. 410166843Srwatson */ 411166843Srwatson if (acc_mode & MBI_APPEND) { 412166843Srwatson acc_mode &= ~MBI_APPEND; 413166843Srwatson acc_mode |= MBI_WRITE; 414166843Srwatson } 415172955Srwatson mtx_lock(&ugidfw_mtx); 416101099Srwatson for (i = 0; i < rule_slots; i++) { 417101099Srwatson if (rules[i] == NULL) 418101099Srwatson continue; 419172955Srwatson error = ugidfw_rulecheck(rules[i], cred, 420157986Sdwmalone vp, vap, acc_mode); 421134131Strhodes if (error == EJUSTRETURN) 422134131Strhodes break; 423145412Strhodes if (error) { 424172955Srwatson mtx_unlock(&ugidfw_mtx); 425101099Srwatson return (error); 426145412Strhodes } 427101099Srwatson } 428172955Srwatson mtx_unlock(&ugidfw_mtx); 429101099Srwatson return (0); 430101099Srwatson} 431101099Srwatson 432101099Srwatsonstatic int 433172955Srwatsonugidfw_check_vp(struct ucred *cred, struct vnode *vp, int acc_mode) 434112575Srwatson{ 435156300Sdwmalone int error; 436112575Srwatson struct vattr vap; 437112575Srwatson 438172955Srwatson if (!ugidfw_enabled) 439112575Srwatson return (0); 440182371Sattilio error = VOP_GETATTR(vp, &vap, cred); 441112575Srwatson if (error) 442112575Srwatson return (error); 443172955Srwatson return (ugidfw_check(cred, vp, &vap, acc_mode)); 444112575Srwatson} 445112575Srwatson 446173138Srwatson/* 447173138Srwatson * Object-specific entry point implementations are sorted alphabetically by 448173138Srwatson * object type and then by operation. 449173138Srwatson */ 450112575Srwatsonstatic int 451172955Srwatsonugidfw_system_check_acct(struct ucred *cred, struct vnode *vp, 452168976Srwatson struct label *vplabel) 453168933Srwatson{ 454168933Srwatson 455181069Srwatson if (vp != NULL) 456181069Srwatson return (ugidfw_check_vp(cred, vp, MBI_WRITE)); 457181069Srwatson else 458181069Srwatson return (0); 459168933Srwatson} 460168933Srwatson 461168933Srwatsonstatic int 462172955Srwatsonugidfw_system_check_auditctl(struct ucred *cred, struct vnode *vp, 463168976Srwatson struct label *vplabel) 464168933Srwatson{ 465168933Srwatson 466181069Srwatson if (vp != NULL) 467181069Srwatson return (ugidfw_check_vp(cred, vp, MBI_WRITE)); 468181069Srwatson else 469181069Srwatson return (0); 470168933Srwatson} 471168933Srwatson 472168933Srwatsonstatic int 473172955Srwatsonugidfw_system_check_swapon(struct ucred *cred, struct vnode *vp, 474168976Srwatson struct label *vplabel) 475156300Sdwmalone{ 476156300Sdwmalone 477172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_WRITE)); 478156300Sdwmalone} 479156300Sdwmalone 480156300Sdwmalonestatic int 481172955Srwatsonugidfw_vnode_check_access(struct ucred *cred, struct vnode *vp, 482168976Srwatson struct label *vplabel, int acc_mode) 483101099Srwatson{ 484101099Srwatson 485172955Srwatson return (ugidfw_check_vp(cred, vp, acc_mode)); 486101099Srwatson} 487101099Srwatson 488101099Srwatsonstatic int 489172955Srwatsonugidfw_vnode_check_chdir(struct ucred *cred, struct vnode *dvp, 490168976Srwatson struct label *dvplabel) 491101099Srwatson{ 492101099Srwatson 493172955Srwatson return (ugidfw_check_vp(cred, dvp, MBI_EXEC)); 494101099Srwatson} 495101099Srwatson 496101099Srwatsonstatic int 497172955Srwatsonugidfw_vnode_check_chroot(struct ucred *cred, struct vnode *dvp, 498168976Srwatson struct label *dvplabel) 499101099Srwatson{ 500101099Srwatson 501172955Srwatson return (ugidfw_check_vp(cred, dvp, MBI_EXEC)); 502101099Srwatson} 503101099Srwatson 504101099Srwatsonstatic int 505172955Srwatsonugidfw_check_create_vnode(struct ucred *cred, struct vnode *dvp, 506168976Srwatson struct label *dvplabel, struct componentname *cnp, struct vattr *vap) 507101099Srwatson{ 508101099Srwatson 509172955Srwatson return (ugidfw_check_vp(cred, dvp, MBI_WRITE)); 510101099Srwatson} 511101099Srwatson 512101099Srwatsonstatic int 513172955Srwatsonugidfw_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 514168976Srwatson struct label *vplabel, acl_type_t type) 515101099Srwatson{ 516101099Srwatson 517172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_ADMIN)); 518101099Srwatson} 519101099Srwatson 520101099Srwatsonstatic int 521172955Srwatsonugidfw_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp, 522172955Srwatson struct label *vplabel, int attrnamespace, const char *name) 523119202Srwatson{ 524119202Srwatson 525172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_WRITE)); 526119202Srwatson} 527119202Srwatson 528119202Srwatsonstatic int 529172955Srwatsonugidfw_vnode_check_exec(struct ucred *cred, struct vnode *vp, 530168976Srwatson struct label *vplabel, struct image_params *imgp, 531106648Srwatson struct label *execlabel) 532101099Srwatson{ 533101099Srwatson 534172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_READ|MBI_EXEC)); 535101099Srwatson} 536101099Srwatson 537101099Srwatsonstatic int 538172955Srwatsonugidfw_vnode_check_getacl(struct ucred *cred, struct vnode *vp, 539168976Srwatson struct label *vplabel, acl_type_t type) 540101099Srwatson{ 541101099Srwatson 542172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_STAT)); 543101099Srwatson} 544101099Srwatson 545101099Srwatsonstatic int 546172955Srwatsonugidfw_vnode_check_getextattr(struct ucred *cred, struct vnode *vp, 547168976Srwatson struct label *vplabel, int attrnamespace, const char *name, 548168976Srwatson struct uio *uio) 549101099Srwatson{ 550101099Srwatson 551172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_READ)); 552101099Srwatson} 553101099Srwatson 554101099Srwatsonstatic int 555172955Srwatsonugidfw_vnode_check_link(struct ucred *cred, struct vnode *dvp, 556168976Srwatson struct label *dvplabel, struct vnode *vp, struct label *label, 557104530Srwatson struct componentname *cnp) 558104530Srwatson{ 559104530Srwatson int error; 560104530Srwatson 561172955Srwatson error = ugidfw_check_vp(cred, dvp, MBI_WRITE); 562104530Srwatson if (error) 563104530Srwatson return (error); 564172955Srwatson error = ugidfw_check_vp(cred, vp, MBI_WRITE); 565104530Srwatson if (error) 566104530Srwatson return (error); 567104530Srwatson return (0); 568104530Srwatson} 569104530Srwatson 570104530Srwatsonstatic int 571172955Srwatsonugidfw_vnode_check_listextattr(struct ucred *cred, struct vnode *vp, 572168976Srwatson struct label *vplabel, int attrnamespace) 573119202Srwatson{ 574119202Srwatson 575172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_READ)); 576119202Srwatson} 577119202Srwatson 578119202Srwatsonstatic int 579172955Srwatsonugidfw_vnode_check_lookup(struct ucred *cred, struct vnode *dvp, 580168976Srwatson struct label *dvplabel, struct componentname *cnp) 581101099Srwatson{ 582117247Srwatson 583172955Srwatson return (ugidfw_check_vp(cred, dvp, MBI_EXEC)); 584101099Srwatson} 585101099Srwatson 586101099Srwatsonstatic int 587172955Srwatsonugidfw_vnode_check_open(struct ucred *cred, struct vnode *vp, 588168976Srwatson struct label *vplabel, int acc_mode) 589101099Srwatson{ 590101099Srwatson 591172955Srwatson return (ugidfw_check_vp(cred, vp, acc_mode)); 592101099Srwatson} 593101099Srwatson 594101099Srwatsonstatic int 595172955Srwatsonugidfw_vnode_check_readdir(struct ucred *cred, struct vnode *dvp, 596168976Srwatson struct label *dvplabel) 597101099Srwatson{ 598101099Srwatson 599172955Srwatson return (ugidfw_check_vp(cred, dvp, MBI_READ)); 600101099Srwatson} 601101099Srwatson 602101099Srwatsonstatic int 603172955Srwatsonugidfw_vnode_check_readdlink(struct ucred *cred, struct vnode *vp, 604168976Srwatson struct label *vplabel) 605101099Srwatson{ 606101099Srwatson 607172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_READ)); 608101099Srwatson} 609101099Srwatson 610101099Srwatsonstatic int 611172955Srwatsonugidfw_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 612168976Srwatson struct label *dvplabel, struct vnode *vp, struct label *vplabel, 613101099Srwatson struct componentname *cnp) 614101099Srwatson{ 615101099Srwatson int error; 616101099Srwatson 617172955Srwatson error = ugidfw_check_vp(cred, dvp, MBI_WRITE); 618101099Srwatson if (error) 619101099Srwatson return (error); 620172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_WRITE)); 621101099Srwatson} 622101099Srwatson 623101099Srwatsonstatic int 624172955Srwatsonugidfw_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 625168976Srwatson struct label *dvplabel, struct vnode *vp, struct label *vplabel, 626168976Srwatson int samedir, struct componentname *cnp) 627101099Srwatson{ 628101099Srwatson int error; 629101099Srwatson 630172955Srwatson error = ugidfw_check_vp(cred, dvp, MBI_WRITE); 631101099Srwatson if (error) 632101099Srwatson return (error); 633156300Sdwmalone if (vp != NULL) 634172955Srwatson error = ugidfw_check_vp(cred, vp, MBI_WRITE); 635101099Srwatson return (error); 636101099Srwatson} 637101099Srwatson 638101099Srwatsonstatic int 639172955Srwatsonugidfw_vnode_check_revoke(struct ucred *cred, struct vnode *vp, 640168976Srwatson struct label *vplabel) 641101099Srwatson{ 642101099Srwatson 643172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_ADMIN)); 644101099Srwatson} 645101099Srwatson 646101099Srwatsonstatic int 647172955Srwatsonugidfw_check_setacl_vnode(struct ucred *cred, struct vnode *vp, 648168976Srwatson struct label *vplabel, acl_type_t type, struct acl *acl) 649101099Srwatson{ 650101099Srwatson 651172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_ADMIN)); 652101099Srwatson} 653101099Srwatson 654101099Srwatsonstatic int 655172955Srwatsonugidfw_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 656168976Srwatson struct label *vplabel, int attrnamespace, const char *name, 657168976Srwatson struct uio *uio) 658101099Srwatson{ 659101099Srwatson 660172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_WRITE)); 661101099Srwatson} 662101099Srwatson 663101099Srwatsonstatic int 664172955Srwatsonugidfw_vnode_check_setflags(struct ucred *cred, struct vnode *vp, 665168976Srwatson struct label *vplabel, u_long flags) 666101099Srwatson{ 667101099Srwatson 668172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_ADMIN)); 669101099Srwatson} 670101099Srwatson 671101099Srwatsonstatic int 672172955Srwatsonugidfw_vnode_check_setmode(struct ucred *cred, struct vnode *vp, 673168976Srwatson struct label *vplabel, mode_t mode) 674101099Srwatson{ 675101099Srwatson 676172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_ADMIN)); 677101099Srwatson} 678101099Srwatson 679101099Srwatsonstatic int 680172955Srwatsonugidfw_vnode_check_setowner(struct ucred *cred, struct vnode *vp, 681168976Srwatson struct label *vplabel, uid_t uid, gid_t gid) 682101099Srwatson{ 683101099Srwatson 684172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_ADMIN)); 685101099Srwatson} 686101099Srwatson 687101099Srwatsonstatic int 688172955Srwatsonugidfw_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 689168976Srwatson struct label *vplabel, struct timespec atime, struct timespec utime) 690101099Srwatson{ 691101099Srwatson 692172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_ADMIN)); 693101099Srwatson} 694101099Srwatson 695101099Srwatsonstatic int 696172955Srwatsonugidfw_vnode_check_stat(struct ucred *active_cred, 697168976Srwatson struct ucred *file_cred, struct vnode *vp, struct label *vplabel) 698101099Srwatson{ 699101099Srwatson 700172955Srwatson return (ugidfw_check_vp(active_cred, vp, MBI_STAT)); 701101099Srwatson} 702101099Srwatson 703172107Srwatsonstatic int 704172955Srwatsonugidfw_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 705172107Srwatson struct label *dvplabel, struct vnode *vp, struct label *vplabel, 706172107Srwatson struct componentname *cnp) 707172107Srwatson{ 708172107Srwatson int error; 709172107Srwatson 710172955Srwatson error = ugidfw_check_vp(cred, dvp, MBI_WRITE); 711172107Srwatson if (error) 712172107Srwatson return (error); 713172955Srwatson return (ugidfw_check_vp(cred, vp, MBI_WRITE)); 714172107Srwatson} 715172107Srwatson 716172955Srwatsonstatic struct mac_policy_ops ugidfw_ops = 717101099Srwatson{ 718172955Srwatson .mpo_destroy = ugidfw_destroy, 719172955Srwatson .mpo_init = ugidfw_init, 720172955Srwatson .mpo_system_check_acct = ugidfw_system_check_acct, 721172955Srwatson .mpo_system_check_auditctl = ugidfw_system_check_auditctl, 722172955Srwatson .mpo_system_check_swapon = ugidfw_system_check_swapon, 723172955Srwatson .mpo_vnode_check_access = ugidfw_vnode_check_access, 724172955Srwatson .mpo_vnode_check_chdir = ugidfw_vnode_check_chdir, 725172955Srwatson .mpo_vnode_check_chroot = ugidfw_vnode_check_chroot, 726172955Srwatson .mpo_vnode_check_create = ugidfw_check_create_vnode, 727172955Srwatson .mpo_vnode_check_deleteacl = ugidfw_vnode_check_deleteacl, 728172955Srwatson .mpo_vnode_check_deleteextattr = ugidfw_vnode_check_deleteextattr, 729172955Srwatson .mpo_vnode_check_exec = ugidfw_vnode_check_exec, 730172955Srwatson .mpo_vnode_check_getacl = ugidfw_vnode_check_getacl, 731172955Srwatson .mpo_vnode_check_getextattr = ugidfw_vnode_check_getextattr, 732172955Srwatson .mpo_vnode_check_link = ugidfw_vnode_check_link, 733172955Srwatson .mpo_vnode_check_listextattr = ugidfw_vnode_check_listextattr, 734172955Srwatson .mpo_vnode_check_lookup = ugidfw_vnode_check_lookup, 735172955Srwatson .mpo_vnode_check_open = ugidfw_vnode_check_open, 736172955Srwatson .mpo_vnode_check_readdir = ugidfw_vnode_check_readdir, 737172955Srwatson .mpo_vnode_check_readlink = ugidfw_vnode_check_readdlink, 738172955Srwatson .mpo_vnode_check_rename_from = ugidfw_vnode_check_rename_from, 739172955Srwatson .mpo_vnode_check_rename_to = ugidfw_vnode_check_rename_to, 740172955Srwatson .mpo_vnode_check_revoke = ugidfw_vnode_check_revoke, 741172955Srwatson .mpo_vnode_check_setacl = ugidfw_check_setacl_vnode, 742172955Srwatson .mpo_vnode_check_setextattr = ugidfw_vnode_check_setextattr, 743172955Srwatson .mpo_vnode_check_setflags = ugidfw_vnode_check_setflags, 744172955Srwatson .mpo_vnode_check_setmode = ugidfw_vnode_check_setmode, 745172955Srwatson .mpo_vnode_check_setowner = ugidfw_vnode_check_setowner, 746172955Srwatson .mpo_vnode_check_setutimes = ugidfw_vnode_check_setutimes, 747172955Srwatson .mpo_vnode_check_stat = ugidfw_vnode_check_stat, 748172955Srwatson .mpo_vnode_check_unlink = ugidfw_vnode_check_unlink, 749101099Srwatson}; 750101099Srwatson 751172955SrwatsonMAC_POLICY_SET(&ugidfw_ops, mac_bsdextended, "TrustedBSD MAC/BSD Extended", 752182063Srwatson MPC_LOADTIME_FLAG_UNLOADOK, NULL, 0); 753