Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/mac.h
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1 /*- 2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 3 * Copyright (c) 2001, 2002 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: releng/5.0/sys/sys/mac.h 107698 2002-12-09 03:44:28Z 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 #ifndef _SYS_MAC_H 43 #define _SYS_MAC_H 44 45 #include <sys/_label.h> 46 47 #ifndef _POSIX_MAC 48 #define _POSIX_MAC 49 #endif 50 51 /* 52 * XXXMAC: The single MAC extended attribute will be deprecated once 53 * compound EA writes on a single target file can be performed cleanly 54 * with UFS2. 55 */ 56 #define FREEBSD_MAC_EXTATTR_NAME "freebsd.mac" 57 #define FREEBSD_MAC_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM 58 59 /* 60 * MAC framework-related constants and limits. 61 */ 62 #define MAC_MAX_POLICY_NAME 32 63 #define MAC_MAX_LABEL_ELEMENT_NAME 32 64 #define MAC_MAX_LABEL_ELEMENT_DATA 4096 65 #define MAC_MAX_LABEL_BUF_LEN 8192 66 67 struct mac { 68 size_t m_buflen; 69 char *m_string; 70 }; 71 72 typedef struct mac *mac_t; 73 74 #ifndef _KERNEL 75 76 /* 77 * Location of the userland MAC framework configuration file. mac.conf 78 * binds policy names to shared libraries that understand those policies, 79 * as well as setting defaults for MAC-aware applications. 80 */ 81 #define MAC_CONFFILE "/etc/mac.conf" 82 83 /* 84 * Extended non-POSIX.1e interfaces that offer additional services 85 * available from the userland and kernel MAC frameworks. 86 */ 87 int mac_execve(char *fname, char **argv, char **envv, 88 mac_t _label); 89 int mac_free(mac_t _label); 90 int mac_from_text(mac_t *_label, const char *_text); 91 int mac_get_fd(int _fd, mac_t _label); 92 int mac_get_file(const char *_path, mac_t _label); 93 int mac_get_link(const char *_path, mac_t _label); 94 int mac_get_pid(pid_t _pid, mac_t _label); 95 int mac_get_proc(mac_t _label); 96 int mac_is_present(const char *_policyname); 97 int mac_prepare(mac_t *_label, char *_elements); 98 int mac_prepare_file_label(mac_t *_label); 99 int mac_prepare_ifnet_label(mac_t *_label); 100 int mac_prepare_process_label(mac_t *_label); 101 int mac_set_fd(int _fildes, const mac_t _label); 102 int mac_set_file(const char *_path, mac_t _label); 103 int mac_set_link(const char *_path, mac_t _label); 104 int mac_set_proc(const mac_t _label); 105 int mac_syscall(const char *_policyname, int _call, void *_arg); 106 int mac_to_text(mac_t mac, char **_text); 107 108 #else /* _KERNEL */ 109 110 /* 111 * Kernel functions to manage and evaluate labels. 112 */ 113 struct bpf_d; 114 struct componentname; 115 struct devfs_dirent; 116 struct ifnet; 117 struct ifreq; 118 struct image_params; 119 struct ipq; 120 struct mbuf; 121 struct mount; 122 struct proc; 123 struct sockaddr; 124 struct socket; 125 struct pipe; 126 struct thread; 127 struct timespec; 128 struct ucred; 129 struct uio; 130 struct vattr; 131 struct vnode; 132 133 #include <sys/acl.h> /* XXX acl_type_t */ 134 135 struct vop_setlabel_args; 136 137 /* 138 * Label operations. 139 */ 140 void mac_init_bpfdesc(struct bpf_d *); 141 void mac_init_cred(struct ucred *); 142 void mac_init_devfsdirent(struct devfs_dirent *); 143 void mac_init_ifnet(struct ifnet *); 144 void mac_init_ipq(struct ipq *); 145 int mac_init_socket(struct socket *, int flag); 146 void mac_init_pipe(struct pipe *); 147 int mac_init_mbuf(struct mbuf *m, int flag); 148 void mac_init_mount(struct mount *); 149 void mac_init_proc(struct proc *); 150 void mac_init_vnode(struct vnode *); 151 void mac_init_vnode_label(struct label *); 152 void mac_copy_vnode_label(struct label *, struct label *label); 153 void mac_destroy_bpfdesc(struct bpf_d *); 154 void mac_destroy_cred(struct ucred *); 155 void mac_destroy_devfsdirent(struct devfs_dirent *); 156 void mac_destroy_ifnet(struct ifnet *); 157 void mac_destroy_ipq(struct ipq *); 158 void mac_destroy_socket(struct socket *); 159 void mac_destroy_pipe(struct pipe *); 160 void mac_destroy_proc(struct proc *); 161 void mac_destroy_mbuf(struct mbuf *); 162 void mac_destroy_mount(struct mount *); 163 void mac_destroy_vnode(struct vnode *); 164 void mac_destroy_vnode_label(struct label *); 165 166 /* 167 * Labeling event operations: file system objects, and things that 168 * look a lot like file system objects. 169 */ 170 void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de, 171 struct vnode *vp); 172 int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp); 173 void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp); 174 void mac_create_devfs_device(struct mount *mp, dev_t dev, 175 struct devfs_dirent *de); 176 void mac_create_devfs_directory(struct mount *mp, char *dirname, 177 int dirnamelen, struct devfs_dirent *de); 178 void mac_create_devfs_symlink(struct ucred *cred, struct mount *mp, 179 struct devfs_dirent *dd, struct devfs_dirent *de); 180 int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp, 181 struct vnode *dvp, struct vnode *vp, struct componentname *cnp); 182 void mac_create_mount(struct ucred *cred, struct mount *mp); 183 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 184 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 185 struct label *newlabel); 186 void mac_update_devfsdirent(struct mount *mp, struct devfs_dirent *de, 187 struct vnode *vp); 188 189 /* 190 * Labeling event operations: IPC objects. 191 */ 192 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 193 void mac_create_socket(struct ucred *cred, struct socket *socket); 194 void mac_create_socket_from_socket(struct socket *oldsocket, 195 struct socket *newsocket); 196 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 197 struct socket *socket); 198 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 199 struct socket *newsocket); 200 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 201 202 /* 203 * Labeling event operations: network objects. 204 */ 205 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 206 void mac_create_ifnet(struct ifnet *ifp); 207 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 208 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 209 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 210 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 211 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 212 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 213 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 214 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 215 struct ifnet *ifnet, struct mbuf *newmbuf); 216 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 217 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 218 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 219 220 /* 221 * Labeling event operations: processes. 222 */ 223 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 224 int mac_execve_enter(struct image_params *imgp, struct mac *mac_p, 225 struct label *execlabel); 226 void mac_execve_exit(struct image_params *imgp); 227 void mac_execve_transition(struct ucred *old, struct ucred *new, 228 struct vnode *vp, struct label *interpvnodelabel, 229 struct image_params *imgp); 230 int mac_execve_will_transition(struct ucred *old, struct vnode *vp, 231 struct label *interpvnodelabel, struct image_params *imgp); 232 void mac_create_proc0(struct ucred *cred); 233 void mac_create_proc1(struct ucred *cred); 234 void mac_thread_userret(struct thread *td); 235 236 /* Access control checks. */ 237 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 238 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 239 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 240 int mac_check_kenv_dump(struct ucred *cred); 241 int mac_check_kenv_get(struct ucred *cred, char *name); 242 int mac_check_kenv_set(struct ucred *cred, char *name, char *value); 243 int mac_check_kenv_unset(struct ucred *cred, char *name); 244 int mac_check_kld_load(struct ucred *cred, struct vnode *vp); 245 int mac_check_kld_stat(struct ucred *cred); 246 int mac_check_kld_unload(struct ucred *cred); 247 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 248 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 249 unsigned long cmd, void *data); 250 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe); 251 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe); 252 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe); 253 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe); 254 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 255 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 256 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 257 int signum); 258 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 259 struct sockaddr *sockaddr); 260 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 261 struct sockaddr *sockaddr); 262 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 263 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 264 int mac_check_socket_receive(struct ucred *cred, struct socket *so); 265 int mac_check_socket_send(struct ucred *cred, struct socket *so); 266 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 267 int mac_check_system_acct(struct ucred *cred, struct vnode *vp); 268 int mac_check_system_nfsd(struct ucred *cred); 269 int mac_check_system_reboot(struct ucred *cred, int howto); 270 int mac_check_system_settime(struct ucred *cred); 271 int mac_check_system_swapon(struct ucred *cred, struct vnode *vp); 272 int mac_check_system_sysctl(struct ucred *cred, int *name, 273 u_int namelen, void *old, size_t *oldlenp, int inkernel, 274 void *new, size_t newlen); 275 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 276 int acc_mode); 277 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 278 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 279 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 280 struct componentname *cnp, struct vattr *vap); 281 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 282 struct vnode *vp, struct componentname *cnp); 283 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 284 acl_type_t type); 285 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp, 286 struct image_params *imgp); 287 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 288 acl_type_t type); 289 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 290 int attrnamespace, const char *name, struct uio *uio); 291 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 292 struct vnode *vp, struct componentname *cnp); 293 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 294 struct componentname *cnp); 295 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 296 int prot); 297 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 298 int prot); 299 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 300 int acc_mode); 301 int mac_check_vnode_poll(struct ucred *active_cred, 302 struct ucred *file_cred, struct vnode *vp); 303 int mac_check_vnode_read(struct ucred *active_cred, 304 struct ucred *file_cred, struct vnode *vp); 305 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 306 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 307 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 308 struct vnode *vp, struct componentname *cnp); 309 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 310 struct vnode *vp, int samedir, struct componentname *cnp); 311 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 312 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 313 acl_type_t type, struct acl *acl); 314 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 315 int attrnamespace, const char *name, struct uio *uio); 316 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 317 u_long flags); 318 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 319 mode_t mode); 320 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 321 uid_t uid, gid_t gid); 322 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 323 struct timespec atime, struct timespec mtime); 324 int mac_check_vnode_stat(struct ucred *active_cred, 325 struct ucred *file_cred, struct vnode *vp); 326 int mac_check_vnode_write(struct ucred *active_cred, 327 struct ucred *file_cred, struct vnode *vp); 328 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 329 struct mac *extmac); 330 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 331 struct mac *extmac); 332 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 333 struct ifnet *ifnet); 334 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 335 struct ifnet *ifnet); 336 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 337 struct mac *extmac); 338 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 339 struct label *label); 340 void mac_cred_mmapped_drop_perms(struct thread *td, struct ucred *cred); 341 342 /* 343 * Calls to help various file systems implement labeling functionality 344 * using their existing EA implementation. 345 */ 346 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 347 348 #endif /* !_KERNEL */ 349 350 #endif /* !_SYS_MAC_H */
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