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 * $FreeBSD$ 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_vnode(struct vnode *); 150 void mac_init_vnode_label(struct label *); 151 void mac_copy_vnode_label(struct label *, struct label *label); 152 void mac_destroy_bpfdesc(struct bpf_d *); 153 void mac_destroy_cred(struct ucred *); 154 void mac_destroy_devfsdirent(struct devfs_dirent *); 155 void mac_destroy_ifnet(struct ifnet *); 156 void mac_destroy_ipq(struct ipq *); 157 void mac_destroy_socket(struct socket *); 158 void mac_destroy_pipe(struct pipe *); 159 void mac_destroy_mbuf(struct mbuf *); 160 void mac_destroy_mount(struct mount *); 161 void mac_destroy_vnode(struct vnode *); 162 void mac_destroy_vnode_label(struct label *); 163 164 /* 165 * Labeling event operations: file system objects, and things that 166 * look a lot like file system objects. 167 */ 168 void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de, 169 struct vnode *vp); 170 int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp); 171 void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp); 172 void mac_create_devfs_device(dev_t dev, struct devfs_dirent *de); 173 void mac_create_devfs_directory(char *dirname, int dirnamelen, 174 struct devfs_dirent *de); 175 void mac_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd, 176 struct devfs_dirent *de); 177 void mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp); 178 int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp, 179 struct vnode *dvp, struct vnode *vp, struct componentname *cnp); 180 void mac_create_mount(struct ucred *cred, struct mount *mp); 181 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 182 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 183 struct label *newlabel); 184 void mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp); 185 186 /* 187 * Labeling event operations: IPC objects. 188 */ 189 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 190 void mac_create_socket(struct ucred *cred, struct socket *socket); 191 void mac_create_socket_from_socket(struct socket *oldsocket, 192 struct socket *newsocket); 193 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 194 struct socket *socket); 195 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 196 struct socket *newsocket); 197 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 198 199 /* 200 * Labeling event operations: network objects. 201 */ 202 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 203 void mac_create_ifnet(struct ifnet *ifp); 204 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 205 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 206 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 207 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 208 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 209 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 210 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 211 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 212 struct ifnet *ifnet, struct mbuf *newmbuf); 213 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 214 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 215 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 216 217 /* 218 * Labeling event operations: processes. 219 */ 220 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 221 int mac_execve_enter(struct image_params *imgp, struct mac *mac_p, 222 struct label *execlabel); 223 void mac_execve_exit(struct image_params *imgp); 224 void mac_execve_transition(struct ucred *old, struct ucred *new, 225 struct vnode *vp, struct label *interpvnodelabel, 226 struct image_params *imgp); 227 int mac_execve_will_transition(struct ucred *old, struct vnode *vp, 228 struct label *interpvnodelabel, struct image_params *imgp); 229 void mac_create_proc0(struct ucred *cred); 230 void mac_create_proc1(struct ucred *cred); 231 void mac_thread_userret(struct thread *td); 232 233 /* Access control checks. */ 234 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 235 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 236 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 237 int mac_check_kenv_dump(struct ucred *cred); 238 int mac_check_kenv_get(struct ucred *cred, char *name); 239 int mac_check_kenv_set(struct ucred *cred, char *name, char *value); 240 int mac_check_kenv_unset(struct ucred *cred, char *name); 241 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 242 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 243 unsigned long cmd, void *data); 244 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe); 245 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe); 246 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe); 247 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe); 248 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 249 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 250 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 251 int signum); 252 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 253 struct sockaddr *sockaddr); 254 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 255 struct sockaddr *sockaddr); 256 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 257 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 258 int mac_check_socket_receive(struct ucred *cred, struct socket *so); 259 int mac_check_socket_send(struct ucred *cred, struct socket *so); 260 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 261 int mac_check_system_acct(struct ucred *cred, struct vnode *vp); 262 int mac_check_system_nfsd(struct ucred *cred); 263 int mac_check_system_reboot(struct ucred *cred, int howto); 264 int mac_check_system_settime(struct ucred *cred); 265 int mac_check_system_swapon(struct ucred *cred, struct vnode *vp); 266 int mac_check_system_sysctl(struct ucred *cred, int *name, 267 u_int namelen, void *old, size_t *oldlenp, int inkernel, 268 void *new, size_t newlen); 269 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 270 int acc_mode); 271 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 272 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 273 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 274 struct componentname *cnp, struct vattr *vap); 275 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 276 struct vnode *vp, struct componentname *cnp); 277 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 278 acl_type_t type); 279 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp, 280 struct image_params *imgp); 281 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 282 acl_type_t type); 283 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 284 int attrnamespace, const char *name, struct uio *uio); 285 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 286 struct vnode *vp, struct componentname *cnp); 287 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 288 struct componentname *cnp); 289 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 290 int prot); 291 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 292 int prot); 293 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 294 int acc_mode); 295 int mac_check_vnode_poll(struct ucred *active_cred, 296 struct ucred *file_cred, struct vnode *vp); 297 int mac_check_vnode_read(struct ucred *active_cred, 298 struct ucred *file_cred, struct vnode *vp); 299 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 300 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 301 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 302 struct vnode *vp, struct componentname *cnp); 303 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 304 struct vnode *vp, int samedir, struct componentname *cnp); 305 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 306 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 307 acl_type_t type, struct acl *acl); 308 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 309 int attrnamespace, const char *name, struct uio *uio); 310 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 311 u_long flags); 312 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 313 mode_t mode); 314 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 315 uid_t uid, gid_t gid); 316 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 317 struct timespec atime, struct timespec mtime); 318 int mac_check_vnode_stat(struct ucred *active_cred, 319 struct ucred *file_cred, struct vnode *vp); 320 int mac_check_vnode_write(struct ucred *active_cred, 321 struct ucred *file_cred, struct vnode *vp); 322 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 323 struct mac *extmac); 324 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 325 struct mac *extmac); 326 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 327 struct ifnet *ifnet); 328 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 329 struct ifnet *ifnet); 330 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 331 struct mac *extmac); 332 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 333 struct label *label); 334 335 /* 336 * Calls to help various file systems implement labeling functionality 337 * using their existing EA implementation. 338 */ 339 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 340 341 #endif /* !_KERNEL */ 342 343 #endif /* !_SYS_MAC_H */ 344