1 /*- 2 * Copyright (c) 1999-2002 Robert N. M. Watson 3 * Copyright (c) 2001-2005 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed by Robert Watson for the TrustedBSD Project. 7 * 8 * This software was developed for the FreeBSD Project in part by Network 9 * Associates Laboratories, the Security Research Division of Network 10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 11 * as part of the DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD$ 35 */ 36 /* 37 * Userland/kernel interface for Mandatory Access Control. 38 * 39 * The POSIX.1e implementation page may be reached at: 40 * http://www.trustedbsd.org/ 41 */ 42 43 #ifndef _SYS_MAC_H_ 44 #define _SYS_MAC_H_ 45 46 #include <sys/_label.h> 47 48 #ifndef _POSIX_MAC 49 #define _POSIX_MAC 50 #endif 51 52 /* 53 * MAC framework-related constants and limits. 54 */ 55 #define MAC_MAX_POLICY_NAME 32 56 #define MAC_MAX_LABEL_ELEMENT_NAME 32 57 #define MAC_MAX_LABEL_ELEMENT_DATA 4096 58 #define MAC_MAX_LABEL_BUF_LEN 8192 59 60 struct mac { 61 size_t m_buflen; 62 char *m_string; 63 }; 64 65 typedef struct mac *mac_t; 66 67 #ifndef _KERNEL 68 69 /* 70 * Location of the userland MAC framework configuration file. mac.conf 71 * binds policy names to shared libraries that understand those policies, 72 * as well as setting defaults for MAC-aware applications. 73 */ 74 #define MAC_CONFFILE "/etc/mac.conf" 75 76 /* 77 * Extended non-POSIX.1e interfaces that offer additional services 78 * available from the userland and kernel MAC frameworks. 79 */ 80 __BEGIN_DECLS 81 int mac_execve(char *fname, char **argv, char **envv, mac_t _label); 82 int mac_free(mac_t _label); 83 int mac_from_text(mac_t *_label, const char *_text); 84 int mac_get_fd(int _fd, mac_t _label); 85 int mac_get_file(const char *_path, mac_t _label); 86 int mac_get_link(const char *_path, mac_t _label); 87 int mac_get_peer(int _fd, mac_t _label); 88 int mac_get_pid(pid_t _pid, mac_t _label); 89 int mac_get_proc(mac_t _label); 90 int mac_is_present(const char *_policyname); 91 int mac_prepare(mac_t *_label, const char *_elements); 92 int mac_prepare_file_label(mac_t *_label); 93 int mac_prepare_ifnet_label(mac_t *_label); 94 int mac_prepare_process_label(mac_t *_label); 95 int mac_prepare_type(mac_t *_label, const char *_type); 96 int mac_set_fd(int _fildes, const mac_t _label); 97 int mac_set_file(const char *_path, mac_t _label); 98 int mac_set_link(const char *_path, mac_t _label); 99 int mac_set_proc(const mac_t _label); 100 int mac_syscall(const char *_policyname, int _call, void *_arg); 101 int mac_to_text(mac_t mac, char **_text); 102 __END_DECLS 103 104 #else /* _KERNEL */ 105 106 /* 107 * Kernel functions to manage and evaluate labels. 108 */ 109 struct bpf_d; 110 struct cdev; 111 struct componentname; 112 struct devfs_dirent; 113 struct ifnet; 114 struct ifreq; 115 struct inpcb; 116 struct image_params; 117 struct inpcb; 118 struct ipq; 119 struct m_tag; 120 struct mbuf; 121 struct mount; 122 struct msg; 123 struct msqid_kernel; 124 struct proc; 125 struct semid_kernel; 126 struct shmid_kernel; 127 struct sockaddr; 128 struct socket; 129 struct sysctl_oid; 130 struct sysctl_req; 131 struct pipepair; 132 struct thread; 133 struct timespec; 134 struct ucred; 135 struct uio; 136 struct vattr; 137 struct vnode; 138 139 #include <sys/acl.h> /* XXX acl_type_t */ 140 141 struct vop_setlabel_args; 142 143 /* 144 * Label operations. 145 */ 146 void mac_init_bpfdesc(struct bpf_d *); 147 void mac_init_cred(struct ucred *); 148 void mac_init_devfsdirent(struct devfs_dirent *); 149 void mac_init_ifnet(struct ifnet *); 150 int mac_init_inpcb(struct inpcb *, int flag); 151 void mac_init_sysv_msgmsg(struct msg *); 152 void mac_init_sysv_msgqueue(struct msqid_kernel*); 153 void mac_init_sysv_sema(struct semid_kernel*); 154 void mac_init_sysv_shm(struct shmid_kernel*); 155 int mac_init_ipq(struct ipq *, int flag); 156 int mac_init_socket(struct socket *, int flag); 157 void mac_init_pipe(struct pipepair *); 158 int mac_init_mbuf(struct mbuf *mbuf, int flag); 159 int mac_init_mbuf_tag(struct m_tag *, int flag); 160 void mac_init_mount(struct mount *); 161 void mac_init_proc(struct proc *); 162 void mac_init_vnode(struct vnode *); 163 void mac_copy_mbuf_tag(struct m_tag *, struct m_tag *); 164 void mac_copy_vnode_label(struct label *, struct label *label); 165 void mac_destroy_bpfdesc(struct bpf_d *); 166 void mac_destroy_cred(struct ucred *); 167 void mac_destroy_devfsdirent(struct devfs_dirent *); 168 void mac_destroy_ifnet(struct ifnet *); 169 void mac_destroy_inpcb(struct inpcb *); 170 void mac_destroy_sysv_msgmsg(struct msg *); 171 void mac_destroy_sysv_msgqueue(struct msqid_kernel *); 172 void mac_destroy_sysv_sema(struct semid_kernel *); 173 void mac_destroy_sysv_shm(struct shmid_kernel *); 174 void mac_destroy_ipq(struct ipq *); 175 void mac_destroy_socket(struct socket *); 176 void mac_destroy_pipe(struct pipepair *); 177 void mac_destroy_proc(struct proc *); 178 void mac_destroy_mbuf_tag(struct m_tag *); 179 void mac_destroy_mount(struct mount *); 180 void mac_destroy_vnode(struct vnode *); 181 182 struct label *mac_cred_label_alloc(void); 183 void mac_cred_label_free(struct label *label); 184 struct label *mac_vnode_label_alloc(void); 185 void mac_vnode_label_free(struct label *label); 186 187 /* 188 * Labeling event operations: file system objects, and things that 189 * look a lot like file system objects. 190 */ 191 void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de, 192 struct vnode *vp); 193 int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp); 194 void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp); 195 void mac_create_devfs_device(struct mount *mp, struct cdev *dev, 196 struct devfs_dirent *de); 197 void mac_create_devfs_directory(struct mount *mp, char *dirname, 198 int dirnamelen, struct devfs_dirent *de); 199 void mac_create_devfs_symlink(struct ucred *cred, struct mount *mp, 200 struct devfs_dirent *dd, struct devfs_dirent *de); 201 int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp, 202 struct vnode *dvp, struct vnode *vp, struct componentname *cnp); 203 void mac_create_mount(struct ucred *cred, struct mount *mp); 204 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 205 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 206 struct label *newlabel); 207 void mac_update_devfsdirent(struct mount *mp, struct devfs_dirent *de, 208 struct vnode *vp); 209 210 /* 211 * Labeling event operations: IPC objects. 212 */ 213 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 214 void mac_create_socket(struct ucred *cred, struct socket *socket); 215 void mac_create_socket_from_socket(struct socket *oldsocket, 216 struct socket *newsocket); 217 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 218 struct socket *socket); 219 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 220 struct socket *newsocket); 221 void mac_create_pipe(struct ucred *cred, struct pipepair *pp); 222 223 /* 224 * Labeling event operations: System V IPC primitives 225 */ 226 void mac_create_sysv_msgmsg(struct ucred *cred, 227 struct msqid_kernel *msqkptr, struct msg *msgptr); 228 void mac_create_sysv_msgqueue(struct ucred *cred, 229 struct msqid_kernel *msqkptr); 230 void mac_create_sysv_sema(struct ucred *cred, 231 struct semid_kernel *semakptr); 232 void mac_create_sysv_shm(struct ucred *cred, 233 struct shmid_kernel *shmsegptr); 234 235 /* 236 * Labeling event operations: network objects. 237 */ 238 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 239 void mac_create_ifnet(struct ifnet *ifp); 240 void mac_create_inpcb_from_socket(struct socket *so, struct inpcb *inp); 241 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 242 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 243 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 244 void mac_create_mbuf_from_inpcb(struct inpcb *inp, struct mbuf *m); 245 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 246 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 247 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 248 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 249 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 250 struct ifnet *ifnet, struct mbuf *newmbuf); 251 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 252 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 253 void mac_reflect_mbuf_icmp(struct mbuf *m); 254 void mac_reflect_mbuf_tcp(struct mbuf *m); 255 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 256 void mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp); 257 258 /* 259 * Labeling event operations: processes. 260 */ 261 void mac_copy_cred(struct ucred *cr1, struct ucred *cr2); 262 int mac_execve_enter(struct image_params *imgp, struct mac *mac_p); 263 void mac_execve_exit(struct image_params *imgp); 264 void mac_execve_transition(struct ucred *old, struct ucred *new, 265 struct vnode *vp, struct label *interpvnodelabel, 266 struct image_params *imgp); 267 int mac_execve_will_transition(struct ucred *old, struct vnode *vp, 268 struct label *interpvnodelabel, struct image_params *imgp); 269 void mac_create_proc0(struct ucred *cred); 270 void mac_create_proc1(struct ucred *cred); 271 void mac_thread_userret(struct thread *td); 272 273 /* 274 * Label cleanup operation: This is the inverse complement for the 275 * mac_create and associate type of hooks. This hook lets the policy 276 * module(s) perform a cleanup/flushing operation on the label 277 * associated with the objects, without freeing up the space allocated. 278 * This hook is useful in cases where it is desirable to remove any 279 * labeling reference when recycling any object to a pool. This hook 280 * does not replace the mac_destroy hooks. 281 */ 282 void mac_cleanup_sysv_msgmsg(struct msg *msgptr); 283 void mac_cleanup_sysv_msgqueue(struct msqid_kernel *msqkptr); 284 void mac_cleanup_sysv_sema(struct semid_kernel *semakptr); 285 void mac_cleanup_sysv_shm(struct shmid_kernel *shmsegptr); 286 287 /* Access control checks. */ 288 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 289 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 290 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 291 int mac_check_inpcb_deliver(struct inpcb *inp, struct mbuf *m); 292 int mac_check_sysv_msgmsq(struct ucred *cred, struct msg *msgptr, 293 struct msqid_kernel *msqkptr); 294 int mac_check_sysv_msgrcv(struct ucred *cred, struct msg *msgptr); 295 int mac_check_sysv_msgrmid(struct ucred *cred, struct msg *msgptr); 296 int mac_check_sysv_msqget(struct ucred *cred, 297 struct msqid_kernel *msqkptr); 298 int mac_check_sysv_msqsnd(struct ucred *cred, 299 struct msqid_kernel *msqkptr); 300 int mac_check_sysv_msqrcv(struct ucred *cred, 301 struct msqid_kernel *msqkptr); 302 int mac_check_sysv_msqctl(struct ucred *cred, 303 struct msqid_kernel *msqkptr, int cmd); 304 int mac_check_sysv_semctl(struct ucred *cred, 305 struct semid_kernel *semakptr, int cmd); 306 int mac_check_sysv_semget(struct ucred *cred, 307 struct semid_kernel *semakptr); 308 int mac_check_sysv_semop(struct ucred *cred,struct semid_kernel *semakptr, 309 size_t accesstype); 310 int mac_check_sysv_shmat(struct ucred *cred, 311 struct shmid_kernel *shmsegptr, int shmflg); 312 int mac_check_sysv_shmctl(struct ucred *cred, 313 struct shmid_kernel *shmsegptr, int cmd); 314 int mac_check_sysv_shmdt(struct ucred *cred, 315 struct shmid_kernel *shmsegptr); 316 int mac_check_sysv_shmget(struct ucred *cred, 317 struct shmid_kernel *shmsegptr, int shmflg); 318 int mac_check_kenv_dump(struct ucred *cred); 319 int mac_check_kenv_get(struct ucred *cred, char *name); 320 int mac_check_kenv_set(struct ucred *cred, char *name, char *value); 321 int mac_check_kenv_unset(struct ucred *cred, char *name); 322 int mac_check_kld_load(struct ucred *cred, struct vnode *vp); 323 int mac_check_kld_stat(struct ucred *cred); 324 int mac_check_kld_unload(struct ucred *cred); 325 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 326 int mac_check_pipe_ioctl(struct ucred *cred, struct pipepair *pp, 327 unsigned long cmd, void *data); 328 int mac_check_pipe_poll(struct ucred *cred, struct pipepair *pp); 329 int mac_check_pipe_read(struct ucred *cred, struct pipepair *pp); 330 int mac_check_pipe_stat(struct ucred *cred, struct pipepair *pp); 331 int mac_check_pipe_write(struct ucred *cred, struct pipepair *pp); 332 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 333 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 334 int mac_check_proc_setuid(struct proc *proc, struct ucred *cred, 335 uid_t uid); 336 int mac_check_proc_seteuid(struct proc *proc, struct ucred *cred, 337 uid_t euid); 338 int mac_check_proc_setgid(struct proc *proc, struct ucred *cred, 339 gid_t gid); 340 int mac_check_proc_setegid(struct proc *proc, struct ucred *cred, 341 gid_t egid); 342 int mac_check_proc_setgroups(struct proc *proc, struct ucred *cred, 343 int ngroups, gid_t *gidset); 344 int mac_check_proc_setreuid(struct proc *proc, struct ucred *cred, 345 uid_t ruid, uid_t euid); 346 int mac_check_proc_setregid(struct proc *proc, struct ucred *cred, 347 gid_t rgid, gid_t egid); 348 int mac_check_proc_setresuid(struct proc *proc, struct ucred *cred, 349 uid_t ruid, uid_t euid, uid_t suid); 350 int mac_check_proc_setresgid(struct proc *proc, struct ucred *cred, 351 gid_t rgid, gid_t egid, gid_t sgid); 352 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 353 int signum); 354 int mac_check_proc_wait(struct ucred *cred, struct proc *proc); 355 int mac_check_socket_accept(struct ucred *cred, struct socket *so); 356 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 357 struct sockaddr *sockaddr); 358 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 359 struct sockaddr *sockaddr); 360 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 361 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 362 int mac_check_socket_poll(struct ucred *cred, struct socket *so); 363 int mac_check_socket_receive(struct ucred *cred, struct socket *so); 364 int mac_check_socket_send(struct ucred *cred, struct socket *so); 365 int mac_check_socket_stat(struct ucred *cred, struct socket *so); 366 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 367 int mac_check_sysarch_ioperm(struct ucred *cred); 368 int mac_check_system_acct(struct ucred *cred, struct vnode *vp); 369 int mac_check_system_nfsd(struct ucred *cred); 370 int mac_check_system_reboot(struct ucred *cred, int howto); 371 int mac_check_system_settime(struct ucred *cred); 372 int mac_check_system_swapon(struct ucred *cred, struct vnode *vp); 373 int mac_check_system_swapoff(struct ucred *cred, struct vnode *vp); 374 int mac_check_system_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 375 void *arg1, int arg2, struct sysctl_req *req); 376 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 377 int acc_mode); 378 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 379 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 380 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 381 struct componentname *cnp, struct vattr *vap); 382 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 383 struct vnode *vp, struct componentname *cnp); 384 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 385 acl_type_t type); 386 int mac_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp, 387 int attrnamespace, const char *name); 388 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp, 389 struct image_params *imgp); 390 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 391 acl_type_t type); 392 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 393 int attrnamespace, const char *name, struct uio *uio); 394 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 395 struct vnode *vp, struct componentname *cnp); 396 int mac_check_vnode_listextattr(struct ucred *cred, struct vnode *vp, 397 int attrnamespace); 398 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 399 struct componentname *cnp); 400 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 401 int prot, int flags); 402 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 403 int prot); 404 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 405 int acc_mode); 406 int mac_check_vnode_poll(struct ucred *active_cred, 407 struct ucred *file_cred, struct vnode *vp); 408 int mac_check_vnode_read(struct ucred *active_cred, 409 struct ucred *file_cred, struct vnode *vp); 410 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 411 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 412 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 413 struct vnode *vp, struct componentname *cnp); 414 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 415 struct vnode *vp, int samedir, struct componentname *cnp); 416 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 417 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 418 acl_type_t type, struct acl *acl); 419 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 420 int attrnamespace, const char *name, struct uio *uio); 421 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 422 u_long flags); 423 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 424 mode_t mode); 425 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 426 uid_t uid, gid_t gid); 427 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 428 struct timespec atime, struct timespec mtime); 429 int mac_check_vnode_stat(struct ucred *active_cred, 430 struct ucred *file_cred, struct vnode *vp); 431 int mac_check_vnode_write(struct ucred *active_cred, 432 struct ucred *file_cred, struct vnode *vp); 433 int mac_getsockopt_label(struct ucred *cred, struct socket *so, 434 struct mac *extmac); 435 int mac_getsockopt_peerlabel(struct ucred *cred, struct socket *so, 436 struct mac *extmac); 437 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 438 struct ifnet *ifnet); 439 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 440 struct ifnet *ifnet); 441 int mac_setsockopt_label(struct ucred *cred, struct socket *so, 442 struct mac *extmac); 443 int mac_pipe_label_set(struct ucred *cred, struct pipepair *pp, 444 struct label *label); 445 void mac_cred_mmapped_drop_perms(struct thread *td, struct ucred *cred); 446 447 /* 448 * Calls to help various file systems implement labeling functionality 449 * using their existing EA implementation. 450 */ 451 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 452 453 #endif /* !_KERNEL */ 454 455 #endif /* !_SYS_MAC_H_ */ 456