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, 2003 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/5.1/sys/sys/mac.h 113681 2003-04-18 19:57:37Z 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 * MAC framework-related constants and limits. 53 */ 54 #define MAC_MAX_POLICY_NAME 32 55 #define MAC_MAX_LABEL_ELEMENT_NAME 32 56 #define MAC_MAX_LABEL_ELEMENT_DATA 4096 57 #define MAC_MAX_LABEL_BUF_LEN 8192 58 59 struct mac { 60 size_t m_buflen; 61 char *m_string; 62 }; 63 64 typedef struct mac *mac_t; 65 66 #ifndef _KERNEL 67 68 /* 69 * Location of the userland MAC framework configuration file. mac.conf 70 * binds policy names to shared libraries that understand those policies, 71 * as well as setting defaults for MAC-aware applications. 72 */ 73 #define MAC_CONFFILE "/etc/mac.conf" 74 75 /* 76 * Extended non-POSIX.1e interfaces that offer additional services 77 * available from the userland and kernel MAC frameworks. 78 */ 79 int mac_execve(char *fname, char **argv, char **envv, 80 mac_t _label); 81 int mac_free(mac_t _label); 82 int mac_from_text(mac_t *_label, const char *_text); 83 int mac_get_fd(int _fd, mac_t _label); 84 int mac_get_file(const char *_path, mac_t _label); 85 int mac_get_link(const char *_path, mac_t _label); 86 int mac_get_pid(pid_t _pid, mac_t _label); 87 int mac_get_proc(mac_t _label); 88 int mac_is_present(const char *_policyname); 89 int mac_prepare(mac_t *_label, char *_elements); 90 int mac_prepare_file_label(mac_t *_label); 91 int mac_prepare_ifnet_label(mac_t *_label); 92 int mac_prepare_process_label(mac_t *_label); 93 int mac_set_fd(int _fildes, const mac_t _label); 94 int mac_set_file(const char *_path, mac_t _label); 95 int mac_set_link(const char *_path, mac_t _label); 96 int mac_set_proc(const mac_t _label); 97 int mac_syscall(const char *_policyname, int _call, void *_arg); 98 int mac_to_text(mac_t mac, char **_text); 99 100 #else /* _KERNEL */ 101 102 /* 103 * Kernel functions to manage and evaluate labels. 104 */ 105 struct bpf_d; 106 struct componentname; 107 struct devfs_dirent; 108 struct ifnet; 109 struct ifreq; 110 struct image_params; 111 struct ipq; 112 struct m_tag; 113 struct mbuf; 114 struct mount; 115 struct proc; 116 struct sockaddr; 117 struct socket; 118 struct pipe; 119 struct thread; 120 struct timespec; 121 struct ucred; 122 struct uio; 123 struct vattr; 124 struct vnode; 125 126 #include <sys/acl.h> /* XXX acl_type_t */ 127 128 struct vop_setlabel_args; 129 130 /* 131 * Label operations. 132 */ 133 void mac_init_bpfdesc(struct bpf_d *); 134 void mac_init_cred(struct ucred *); 135 void mac_init_devfsdirent(struct devfs_dirent *); 136 void mac_init_ifnet(struct ifnet *); 137 int mac_init_ipq(struct ipq *, int flag); 138 int mac_init_socket(struct socket *, int flag); 139 void mac_init_pipe(struct pipe *); 140 int mac_init_mbuf(struct mbuf *mbuf, int flag); 141 int mac_init_mbuf_tag(struct m_tag *, int flag); 142 void mac_init_mount(struct mount *); 143 void mac_init_proc(struct proc *); 144 void mac_init_vnode(struct vnode *); 145 void mac_init_vnode_label(struct label *); 146 void mac_copy_mbuf_tag(struct m_tag *, struct m_tag *); 147 void mac_copy_vnode_label(struct label *, struct label *label); 148 void mac_destroy_bpfdesc(struct bpf_d *); 149 void mac_destroy_cred(struct ucred *); 150 void mac_destroy_devfsdirent(struct devfs_dirent *); 151 void mac_destroy_ifnet(struct ifnet *); 152 void mac_destroy_ipq(struct ipq *); 153 void mac_destroy_socket(struct socket *); 154 void mac_destroy_pipe(struct pipe *); 155 void mac_destroy_proc(struct proc *); 156 void mac_destroy_mbuf_tag(struct m_tag *); 157 void mac_destroy_mount(struct mount *); 158 void mac_destroy_vnode(struct vnode *); 159 void mac_destroy_vnode_label(struct label *); 160 161 /* 162 * Labeling event operations: file system objects, and things that 163 * look a lot like file system objects. 164 */ 165 void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de, 166 struct vnode *vp); 167 int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp); 168 void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp); 169 void mac_create_devfs_device(struct mount *mp, dev_t dev, 170 struct devfs_dirent *de); 171 void mac_create_devfs_directory(struct mount *mp, char *dirname, 172 int dirnamelen, struct devfs_dirent *de); 173 void mac_create_devfs_symlink(struct ucred *cred, struct mount *mp, 174 struct devfs_dirent *dd, struct devfs_dirent *de); 175 int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp, 176 struct vnode *dvp, struct vnode *vp, struct componentname *cnp); 177 void mac_create_mount(struct ucred *cred, struct mount *mp); 178 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 179 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 180 struct label *newlabel); 181 void mac_update_devfsdirent(struct mount *mp, struct devfs_dirent *de, 182 struct vnode *vp); 183 184 /* 185 * Labeling event operations: IPC objects. 186 */ 187 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 188 void mac_create_socket(struct ucred *cred, struct socket *socket); 189 void mac_create_socket_from_socket(struct socket *oldsocket, 190 struct socket *newsocket); 191 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 192 struct socket *socket); 193 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 194 struct socket *newsocket); 195 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 196 197 /* 198 * Labeling event operations: network objects. 199 */ 200 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 201 void mac_create_ifnet(struct ifnet *ifp); 202 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 203 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 204 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 205 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 206 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 207 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 208 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 209 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 210 struct ifnet *ifnet, struct mbuf *newmbuf); 211 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 212 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 213 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 214 215 /* 216 * Labeling event operations: processes. 217 */ 218 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 219 int mac_execve_enter(struct image_params *imgp, struct mac *mac_p, 220 struct label *execlabel); 221 void mac_execve_exit(struct image_params *imgp); 222 void mac_execve_transition(struct ucred *old, struct ucred *new, 223 struct vnode *vp, struct label *interpvnodelabel, 224 struct image_params *imgp); 225 int mac_execve_will_transition(struct ucred *old, struct vnode *vp, 226 struct label *interpvnodelabel, struct image_params *imgp); 227 void mac_create_proc0(struct ucred *cred); 228 void mac_create_proc1(struct ucred *cred); 229 void mac_thread_userret(struct thread *td); 230 231 /* Access control checks. */ 232 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 233 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 234 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 235 int mac_check_kenv_dump(struct ucred *cred); 236 int mac_check_kenv_get(struct ucred *cred, char *name); 237 int mac_check_kenv_set(struct ucred *cred, char *name, char *value); 238 int mac_check_kenv_unset(struct ucred *cred, char *name); 239 int mac_check_kld_load(struct ucred *cred, struct vnode *vp); 240 int mac_check_kld_stat(struct ucred *cred); 241 int mac_check_kld_unload(struct ucred *cred); 242 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 243 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 244 unsigned long cmd, void *data); 245 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe); 246 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe); 247 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe); 248 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe); 249 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 250 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 251 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 252 int signum); 253 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 254 struct sockaddr *sockaddr); 255 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 256 struct sockaddr *sockaddr); 257 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 258 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 259 int mac_check_socket_receive(struct ucred *cred, struct socket *so); 260 int mac_check_socket_send(struct ucred *cred, struct socket *so); 261 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 262 int mac_check_sysarch_ioperm(struct ucred *cred); 263 int mac_check_system_acct(struct ucred *cred, struct vnode *vp); 264 int mac_check_system_nfsd(struct ucred *cred); 265 int mac_check_system_reboot(struct ucred *cred, int howto); 266 int mac_check_system_settime(struct ucred *cred); 267 int mac_check_system_swapon(struct ucred *cred, struct vnode *vp); 268 int mac_check_system_swapoff(struct ucred *cred, struct vnode *vp); 269 int mac_check_system_sysctl(struct ucred *cred, int *name, 270 u_int namelen, void *old, size_t *oldlenp, int inkernel, 271 void *new, size_t newlen); 272 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 273 int acc_mode); 274 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 275 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 276 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 277 struct componentname *cnp, struct vattr *vap); 278 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 279 struct vnode *vp, struct componentname *cnp); 280 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 281 acl_type_t type); 282 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp, 283 struct image_params *imgp); 284 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 285 acl_type_t type); 286 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 287 int attrnamespace, const char *name, struct uio *uio); 288 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 289 struct vnode *vp, struct componentname *cnp); 290 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 291 struct componentname *cnp); 292 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 293 int prot); 294 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 295 int prot); 296 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 297 int acc_mode); 298 int mac_check_vnode_poll(struct ucred *active_cred, 299 struct ucred *file_cred, struct vnode *vp); 300 int mac_check_vnode_read(struct ucred *active_cred, 301 struct ucred *file_cred, struct vnode *vp); 302 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 303 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 304 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 305 struct vnode *vp, struct componentname *cnp); 306 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 307 struct vnode *vp, int samedir, struct componentname *cnp); 308 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 309 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 310 acl_type_t type, struct acl *acl); 311 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 312 int attrnamespace, const char *name, struct uio *uio); 313 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 314 u_long flags); 315 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 316 mode_t mode); 317 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 318 uid_t uid, gid_t gid); 319 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 320 struct timespec atime, struct timespec mtime); 321 int mac_check_vnode_stat(struct ucred *active_cred, 322 struct ucred *file_cred, struct vnode *vp); 323 int mac_check_vnode_write(struct ucred *active_cred, 324 struct ucred *file_cred, struct vnode *vp); 325 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 326 struct mac *extmac); 327 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 328 struct mac *extmac); 329 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 330 struct ifnet *ifnet); 331 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 332 struct ifnet *ifnet); 333 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 334 struct mac *extmac); 335 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 336 struct label *label); 337 void mac_cred_mmapped_drop_perms(struct thread *td, struct ucred *cred); 338 339 /* 340 * Calls to help various file systems implement labeling functionality 341 * using their existing EA implementation. 342 */ 343 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 344 345 #endif /* !_KERNEL */ 346 347 #endif /* !_SYS_MAC_H */
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