mac.h revision 145234
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: head/sys/sys/mac.h 145234 2005-04-18 13:36:57Z rwatson $ 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 60struct mac { 61 size_t m_buflen; 62 char *m_string; 63}; 64 65typedef 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 81int mac_execve(char *fname, char **argv, char **envv, mac_t _label); 82int mac_free(mac_t _label); 83int mac_from_text(mac_t *_label, const char *_text); 84int mac_get_fd(int _fd, mac_t _label); 85int mac_get_file(const char *_path, mac_t _label); 86int mac_get_link(const char *_path, mac_t _label); 87int mac_get_peer(int _fd, mac_t _label); 88int mac_get_pid(pid_t _pid, mac_t _label); 89int mac_get_proc(mac_t _label); 90int mac_is_present(const char *_policyname); 91int mac_prepare(mac_t *_label, const char *_elements); 92int mac_prepare_file_label(mac_t *_label); 93int mac_prepare_ifnet_label(mac_t *_label); 94int mac_prepare_process_label(mac_t *_label); 95int mac_prepare_type(mac_t *_label, const char *_type); 96int mac_set_fd(int _fildes, const mac_t _label); 97int mac_set_file(const char *_path, mac_t _label); 98int mac_set_link(const char *_path, mac_t _label); 99int mac_set_proc(const mac_t _label); 100int mac_syscall(const char *_policyname, int _call, void *_arg); 101int 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 */ 109struct bpf_d; 110struct cdev; 111struct componentname; 112struct devfs_dirent; 113struct ifnet; 114struct ifreq; 115struct inpcb; 116struct image_params; 117struct inpcb; 118struct ipq; 119struct m_tag; 120struct mbuf; 121struct mount; 122struct msg; 123struct msqid_kernel; 124struct proc; 125struct semid_kernel; 126struct shmid_kernel; 127struct sockaddr; 128struct socket; 129struct sysctl_oid; 130struct sysctl_req; 131struct pipepair; 132struct thread; 133struct timespec; 134struct ucred; 135struct uio; 136struct vattr; 137struct vnode; 138 139#include <sys/acl.h> /* XXX acl_type_t */ 140 141struct vop_setlabel_args; 142 143/* 144 * Label operations. 145 */ 146void mac_init_bpfdesc(struct bpf_d *); 147void mac_init_cred(struct ucred *); 148void mac_init_devfsdirent(struct devfs_dirent *); 149void mac_init_ifnet(struct ifnet *); 150int mac_init_inpcb(struct inpcb *, int flag); 151void mac_init_sysv_msgmsg(struct msg *); 152void mac_init_sysv_msgqueue(struct msqid_kernel*); 153void mac_init_sysv_sema(struct semid_kernel*); 154void mac_init_sysv_shm(struct shmid_kernel*); 155int mac_init_ipq(struct ipq *, int flag); 156int mac_init_socket(struct socket *, int flag); 157void mac_init_pipe(struct pipepair *); 158int mac_init_mbuf(struct mbuf *mbuf, int flag); 159int mac_init_mbuf_tag(struct m_tag *, int flag); 160void mac_init_mount(struct mount *); 161void mac_init_proc(struct proc *); 162void mac_init_vnode(struct vnode *); 163void mac_copy_mbuf_tag(struct m_tag *, struct m_tag *); 164void mac_copy_vnode_label(struct label *, struct label *label); 165void mac_destroy_bpfdesc(struct bpf_d *); 166void mac_destroy_cred(struct ucred *); 167void mac_destroy_devfsdirent(struct devfs_dirent *); 168void mac_destroy_ifnet(struct ifnet *); 169void mac_destroy_inpcb(struct inpcb *); 170void mac_destroy_sysv_msgmsg(struct msg *); 171void mac_destroy_sysv_msgqueue(struct msqid_kernel *); 172void mac_destroy_sysv_sema(struct semid_kernel *); 173void mac_destroy_sysv_shm(struct shmid_kernel *); 174void mac_destroy_ipq(struct ipq *); 175void mac_destroy_socket(struct socket *); 176void mac_destroy_pipe(struct pipepair *); 177void mac_destroy_proc(struct proc *); 178void mac_destroy_mbuf_tag(struct m_tag *); 179void mac_destroy_mount(struct mount *); 180void mac_destroy_vnode(struct vnode *); 181 182struct label *mac_cred_label_alloc(void); 183void mac_cred_label_free(struct label *label); 184struct label *mac_vnode_label_alloc(void); 185void 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 */ 191void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de, 192 struct vnode *vp); 193int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp); 194void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp); 195void mac_create_devfs_device(struct mount *mp, struct cdev *dev, 196 struct devfs_dirent *de); 197void mac_create_devfs_directory(struct mount *mp, char *dirname, 198 int dirnamelen, struct devfs_dirent *de); 199void mac_create_devfs_symlink(struct ucred *cred, struct mount *mp, 200 struct devfs_dirent *dd, struct devfs_dirent *de); 201int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp, 202 struct vnode *dvp, struct vnode *vp, struct componentname *cnp); 203void mac_create_mount(struct ucred *cred, struct mount *mp); 204void mac_create_root_mount(struct ucred *cred, struct mount *mp); 205void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 206 struct label *newlabel); 207void mac_update_devfsdirent(struct mount *mp, struct devfs_dirent *de, 208 struct vnode *vp); 209 210/* 211 * Labeling event operations: IPC objects. 212 */ 213void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 214void mac_create_socket(struct ucred *cred, struct socket *socket); 215void mac_create_socket_from_socket(struct socket *oldsocket, 216 struct socket *newsocket); 217void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 218 struct socket *socket); 219void mac_set_socket_peer_from_socket(struct socket *oldsocket, 220 struct socket *newsocket); 221void mac_create_pipe(struct ucred *cred, struct pipepair *pp); 222 223/* 224 * Labeling event operations: System V IPC primitives 225 */ 226void mac_create_sysv_msgmsg(struct ucred *cred, 227 struct msqid_kernel *msqkptr, struct msg *msgptr); 228void mac_create_sysv_msgqueue(struct ucred *cred, 229 struct msqid_kernel *msqkptr); 230void mac_create_sysv_sema(struct ucred *cred, 231 struct semid_kernel *semakptr); 232void mac_create_sysv_shm(struct ucred *cred, 233 struct shmid_kernel *shmsegptr); 234 235/* 236 * Labeling event operations: network objects. 237 */ 238void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 239void mac_create_ifnet(struct ifnet *ifp); 240void mac_create_inpcb_from_socket(struct socket *so, struct inpcb *inp); 241void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 242void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 243void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 244void mac_create_mbuf_from_inpcb(struct inpcb *inp, struct mbuf *m); 245void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 246void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 247void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 248void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 249void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 250 struct ifnet *ifnet, struct mbuf *newmbuf); 251void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 252int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 253void mac_reflect_mbuf_icmp(struct mbuf *m); 254void mac_reflect_mbuf_tcp(struct mbuf *m); 255void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 256void mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp); 257 258/* 259 * Labeling event operations: processes. 260 */ 261void mac_copy_cred(struct ucred *cr1, struct ucred *cr2); 262int mac_execve_enter(struct image_params *imgp, struct mac *mac_p); 263void mac_execve_exit(struct image_params *imgp); 264void mac_execve_transition(struct ucred *old, struct ucred *new, 265 struct vnode *vp, struct label *interpvnodelabel, 266 struct image_params *imgp); 267int mac_execve_will_transition(struct ucred *old, struct vnode *vp, 268 struct label *interpvnodelabel, struct image_params *imgp); 269void mac_create_proc0(struct ucred *cred); 270void mac_create_proc1(struct ucred *cred); 271void 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 */ 282void mac_cleanup_sysv_msgmsg(struct msg *msgptr); 283void mac_cleanup_sysv_msgqueue(struct msqid_kernel *msqkptr); 284void mac_cleanup_sysv_sema(struct semid_kernel *semakptr); 285void mac_cleanup_sysv_shm(struct shmid_kernel *shmsegptr); 286 287/* Access control checks. */ 288int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 289int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 290int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 291int mac_check_inpcb_deliver(struct inpcb *inp, struct mbuf *m); 292int mac_check_sysv_msgmsq(struct ucred *cred, struct msg *msgptr, 293 struct msqid_kernel *msqkptr); 294int mac_check_sysv_msgrcv(struct ucred *cred, struct msg *msgptr); 295int mac_check_sysv_msgrmid(struct ucred *cred, struct msg *msgptr); 296int mac_check_sysv_msqget(struct ucred *cred, 297 struct msqid_kernel *msqkptr); 298int mac_check_sysv_msqsnd(struct ucred *cred, 299 struct msqid_kernel *msqkptr); 300int mac_check_sysv_msqrcv(struct ucred *cred, 301 struct msqid_kernel *msqkptr); 302int mac_check_sysv_msqctl(struct ucred *cred, 303 struct msqid_kernel *msqkptr, int cmd); 304int mac_check_sysv_semctl(struct ucred *cred, 305 struct semid_kernel *semakptr, int cmd); 306int mac_check_sysv_semget(struct ucred *cred, 307 struct semid_kernel *semakptr); 308int mac_check_sysv_semop(struct ucred *cred,struct semid_kernel *semakptr, 309 size_t accesstype); 310int mac_check_sysv_shmat(struct ucred *cred, 311 struct shmid_kernel *shmsegptr, int shmflg); 312int mac_check_sysv_shmctl(struct ucred *cred, 313 struct shmid_kernel *shmsegptr, int cmd); 314int mac_check_sysv_shmdt(struct ucred *cred, 315 struct shmid_kernel *shmsegptr); 316int mac_check_sysv_shmget(struct ucred *cred, 317 struct shmid_kernel *shmsegptr, int shmflg); 318int mac_check_kenv_dump(struct ucred *cred); 319int mac_check_kenv_get(struct ucred *cred, char *name); 320int mac_check_kenv_set(struct ucred *cred, char *name, char *value); 321int mac_check_kenv_unset(struct ucred *cred, char *name); 322int mac_check_kld_load(struct ucred *cred, struct vnode *vp); 323int mac_check_kld_stat(struct ucred *cred); 324int mac_check_kld_unload(struct ucred *cred); 325int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 326int mac_check_pipe_ioctl(struct ucred *cred, struct pipepair *pp, 327 unsigned long cmd, void *data); 328int mac_check_pipe_poll(struct ucred *cred, struct pipepair *pp); 329int mac_check_pipe_read(struct ucred *cred, struct pipepair *pp); 330int mac_check_pipe_stat(struct ucred *cred, struct pipepair *pp); 331int mac_check_pipe_write(struct ucred *cred, struct pipepair *pp); 332int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 333int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 334int mac_check_proc_setuid(struct proc *proc, struct ucred *cred, 335 uid_t uid); 336int mac_check_proc_seteuid(struct proc *proc, struct ucred *cred, 337 uid_t euid); 338int mac_check_proc_setgid(struct proc *proc, struct ucred *cred, 339 gid_t gid); 340int mac_check_proc_setegid(struct proc *proc, struct ucred *cred, 341 gid_t egid); 342int mac_check_proc_setgroups(struct proc *proc, struct ucred *cred, 343 int ngroups, gid_t *gidset); 344int mac_check_proc_setreuid(struct proc *proc, struct ucred *cred, 345 uid_t ruid, uid_t euid); 346int mac_check_proc_setregid(struct proc *proc, struct ucred *cred, 347 gid_t rgid, gid_t egid); 348int mac_check_proc_setresuid(struct proc *proc, struct ucred *cred, 349 uid_t ruid, uid_t euid, uid_t suid); 350int mac_check_proc_setresgid(struct proc *proc, struct ucred *cred, 351 gid_t rgid, gid_t egid, gid_t sgid); 352int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 353 int signum); 354int mac_check_proc_wait(struct ucred *cred, struct proc *proc); 355int mac_check_socket_accept(struct ucred *cred, struct socket *so); 356int mac_check_socket_bind(struct ucred *cred, struct socket *so, 357 struct sockaddr *sockaddr); 358int mac_check_socket_connect(struct ucred *cred, struct socket *so, 359 struct sockaddr *sockaddr); 360int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 361int mac_check_socket_listen(struct ucred *cred, struct socket *so); 362int mac_check_socket_poll(struct ucred *cred, struct socket *so); 363int mac_check_socket_receive(struct ucred *cred, struct socket *so); 364int mac_check_socket_send(struct ucred *cred, struct socket *so); 365int mac_check_socket_stat(struct ucred *cred, struct socket *so); 366int mac_check_socket_visible(struct ucred *cred, struct socket *so); 367int mac_check_sysarch_ioperm(struct ucred *cred); 368int mac_check_system_acct(struct ucred *cred, struct vnode *vp); 369int mac_check_system_nfsd(struct ucred *cred); 370int mac_check_system_reboot(struct ucred *cred, int howto); 371int mac_check_system_settime(struct ucred *cred); 372int mac_check_system_swapon(struct ucred *cred, struct vnode *vp); 373int mac_check_system_swapoff(struct ucred *cred, struct vnode *vp); 374int mac_check_system_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 375 void *arg1, int arg2, struct sysctl_req *req); 376int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 377 int acc_mode); 378int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 379int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 380int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 381 struct componentname *cnp, struct vattr *vap); 382int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 383 struct vnode *vp, struct componentname *cnp); 384int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 385 acl_type_t type); 386int mac_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp, 387 int attrnamespace, const char *name); 388int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp, 389 struct image_params *imgp); 390int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 391 acl_type_t type); 392int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 393 int attrnamespace, const char *name, struct uio *uio); 394int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 395 struct vnode *vp, struct componentname *cnp); 396int mac_check_vnode_listextattr(struct ucred *cred, struct vnode *vp, 397 int attrnamespace); 398int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 399 struct componentname *cnp); 400int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 401 int prot, int flags); 402int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 403 int prot); 404int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 405 int acc_mode); 406int mac_check_vnode_poll(struct ucred *active_cred, 407 struct ucred *file_cred, struct vnode *vp); 408int mac_check_vnode_read(struct ucred *active_cred, 409 struct ucred *file_cred, struct vnode *vp); 410int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 411int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 412int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 413 struct vnode *vp, struct componentname *cnp); 414int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 415 struct vnode *vp, int samedir, struct componentname *cnp); 416int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 417int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 418 acl_type_t type, struct acl *acl); 419int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 420 int attrnamespace, const char *name, struct uio *uio); 421int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 422 u_long flags); 423int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 424 mode_t mode); 425int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 426 uid_t uid, gid_t gid); 427int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 428 struct timespec atime, struct timespec mtime); 429int mac_check_vnode_stat(struct ucred *active_cred, 430 struct ucred *file_cred, struct vnode *vp); 431int mac_check_vnode_write(struct ucred *active_cred, 432 struct ucred *file_cred, struct vnode *vp); 433int mac_getsockopt_label(struct ucred *cred, struct socket *so, 434 struct mac *extmac); 435int mac_getsockopt_peerlabel(struct ucred *cred, struct socket *so, 436 struct mac *extmac); 437int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 438 struct ifnet *ifnet); 439int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 440 struct ifnet *ifnet); 441int mac_setsockopt_label(struct ucred *cred, struct socket *so, 442 struct mac *extmac); 443int mac_pipe_label_set(struct ucred *cred, struct pipepair *pp, 444 struct label *label); 445void 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 */ 451int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 452 453#endif /* !_KERNEL */ 454 455#endif /* !_SYS_MAC_H_ */ 456