1 | /*- |
2 | * Copyright (c) 2004-2016 Apple Inc. |
3 | * All rights reserved. |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 3. Neither the name of Apple Inc. ("Apple") nor the names of |
14 | * its contributors may be used to endorse or promote products derived |
15 | * from this software without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND |
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
20 | * ARE DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR |
21 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
25 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
26 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
27 | * POSSIBILITY OF SUCH DAMAGE. |
28 | * |
29 | */ |
30 | /* |
31 | * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce |
32 | * support for mandatory and extensible security protections. This notice |
33 | * is included in support of clause 2.2 (b) of the Apple Public License, |
34 | * Version 2.0. |
35 | */ |
36 | |
37 | /* |
38 | * This header includes function prototypes and type definitions that are |
39 | * necessary for the kernel as a whole to interact with the audit subsystem. |
40 | */ |
41 | |
42 | #ifndef _SECURITY_AUDIT_AUDIT_H |
43 | #define _SECURITY_AUDIT_AUDIT_H |
44 | |
45 | #if defined(_KERNEL) || defined(KERNEL) |
46 | |
47 | #include <bsm/audit.h> |
48 | |
49 | #include <sys/sysctl.h> |
50 | #include <sys/user.h> |
51 | #include <sys/ipc.h> |
52 | |
53 | /* |
54 | * Audit subsystem condition flags. The audit_enabled flag is set and |
55 | * removed automatically as a result of configuring log files, and can be |
56 | * observed but should not be directly manipulated. The audit suspension |
57 | * flag permits audit to be temporarily disabled without reconfiguring the |
58 | * audit target. The audit syscalls flag is set at the first hint that kernel |
59 | * events (system and mach calls) need to be audited. It is used for |
60 | * performance so an event class map table lookup doesn't have be done for |
61 | * every system call if only user events are being audited. |
62 | */ |
63 | extern int audit_enabled; |
64 | extern int audit_suspended; |
65 | extern int audit_syscalls; |
66 | |
67 | /* |
68 | * Define the masks for the audited arguments. |
69 | * |
70 | * XXXRW: These need to remain in audit.h for now because our vnode and name |
71 | * lookup audit calls rely on passing in flags to indicate which name or |
72 | * vnode is being logged. These should move to audit_private.h when that is |
73 | * fixed. |
74 | */ |
75 | #define ARG_EUID 0x0000000000000001ULL |
76 | #define ARG_RUID 0x0000000000000002ULL |
77 | #define ARG_SUID 0x0000000000000004ULL |
78 | #define ARG_EGID 0x0000000000000008ULL |
79 | #define ARG_RGID 0x0000000000000010ULL |
80 | #define ARG_SGID 0x0000000000000020ULL |
81 | #define ARG_PID 0x0000000000000040ULL |
82 | #define ARG_UID 0x0000000000000080ULL |
83 | #define ARG_AUID 0x0000000000000100ULL |
84 | #define ARG_GID 0x0000000000000200ULL |
85 | #define ARG_FD 0x0000000000000400ULL |
86 | #define ARG_FD1 ARG_FD |
87 | #define ARG_POSIX_IPC_PERM 0x0000000000000800ULL |
88 | #define ARG_FFLAGS 0x0000000000001000ULL |
89 | #define ARG_MODE 0x0000000000002000ULL |
90 | #define ARG_VALUE32 0x0000000000004000ULL |
91 | #define ARG_ADDR32 0x0000000000008000ULL |
92 | #define ARG_ADDR ARG_ADDR32 |
93 | #define ARG_LEN 0x0000000000010000ULL |
94 | #define ARG_MASK 0x0000000000020000ULL |
95 | #define ARG_SIGNUM 0x0000000000040000ULL |
96 | #define ARG_LOGIN 0x0000000000080000ULL |
97 | #define ARG_SADDRINET 0x0000000000100000ULL |
98 | #define ARG_SADDRINET6 0x0000000000200000ULL |
99 | #define ARG_SADDRUNIX 0x0000000000400000ULL |
100 | #define ARG_TERMID_ADDR ARG_SADDRUNIX |
101 | #define ARG_KPATH1 0x0000000000800000ULL /* darwin-only */ |
102 | #define ARG_KPATH2 0x0000000001000000ULL /* darwin-only */ |
103 | #define ARG_UPATH1 0x0000000002000000ULL |
104 | #define ARG_UPATH2 0x0000000004000000ULL |
105 | #define ARG_TEXT 0x0000000008000000ULL |
106 | #define ARG_VNODE1 0x0000000010000000ULL |
107 | #define ARG_VNODE2 0x0000000020000000ULL |
108 | #define ARG_SVIPC_CMD 0x0000000040000000ULL |
109 | #define ARG_SVIPC_PERM 0x0000000080000000ULL |
110 | #define ARG_SVIPC_ID 0x0000000100000000ULL |
111 | #define ARG_SVIPC_ADDR 0x0000000200000000ULL |
112 | #define ARG_GROUPSET 0x0000000400000000ULL |
113 | #define ARG_CMD 0x0000000800000000ULL |
114 | #define ARG_SOCKINFO 0x0000001000000000ULL |
115 | #define ARG_ASID 0x0000002000000000ULL |
116 | #define ARG_TERMID 0x0000004000000000ULL |
117 | #define ARG_AUDITON 0x0000008000000000ULL |
118 | #define ARG_VALUE64 0x0000010000000000ULL /* darwin-only */ |
119 | #define ARG_AMASK 0x0000020000000000ULL |
120 | #define ARG_CTLNAME 0x0000040000000000ULL |
121 | #define ARG_PROCESS 0x0000080000000000ULL |
122 | #define ARG_MACHPORT1 0x0000100000000000ULL |
123 | #define ARG_MACHPORT2 0x0000200000000000ULL |
124 | #define ARG_MAC_STRING 0x0000400000000000ULL |
125 | #define ARG_EXIT 0x0000800000000000ULL |
126 | #define ARG_IOVECSTR 0x0001000000000000ULL |
127 | #define ARG_ARGV 0x0002000000000000ULL |
128 | #define ARG_ENVV 0x0004000000000000ULL |
129 | #define ARG_OPAQUE 0x0008000000000000ULL /* darwin-only */ |
130 | #define ARG_DATA 0x0010000000000000ULL /* darwin-only */ |
131 | #define ARG_ADDR64 0x0020000000000000ULL /* darwin-only */ |
132 | #define ARG_FD2 0x0040000000000000ULL /* darwin-only */ |
133 | #define ARG_IDENTITY 0x0080000000000000ULL /* darwin-only */ |
134 | #define ARG_NONE 0x0000000000000000ULL |
135 | #define ARG_ALL 0xFFFFFFFFFFFFFFFFULL |
136 | |
137 | #if CONFIG_MACF |
138 | |
139 | #define MAC_AUDIT_LABEL_LEN 1024 |
140 | #define MAC_AUDIT_DATA_TYPE 0 |
141 | #define MAC_AUDIT_TEXT_TYPE 1 |
142 | |
143 | struct mac_audit_record { |
144 | int type; /* one of the types defined above */ |
145 | int length; /* byte length of the data field */ |
146 | u_char *data; /* the payload */ |
147 | LIST_ENTRY(mac_audit_record) records; |
148 | }; |
149 | |
150 | #endif |
151 | |
152 | struct proc; |
153 | struct vnode; |
154 | struct componentname; |
155 | |
156 | int kau_will_audit(void); |
157 | void audit_init(void); |
158 | void audit_shutdown(void); |
159 | void audit_syscall_enter(unsigned int code, |
160 | struct proc *proc, struct uthread *uthread); |
161 | #if CONFIG_MACF |
162 | /* |
163 | * The parameter list of audit_syscall_exit() was modified to also take the |
164 | * Darwin syscall number, which is required by mac_audit_check_postselect(). |
165 | */ |
166 | void audit_syscall_exit(unsigned int code, int error, |
167 | struct proc *proc, struct uthread *uthread); |
168 | #else |
169 | void audit_syscall_exit(int error, struct proc *proc, |
170 | struct uthread *uthread); |
171 | #endif |
172 | void audit_mach_syscall_enter(unsigned short audit_event); |
173 | void audit_mach_syscall_exit(int retval, struct uthread *uthread); |
174 | |
175 | extern struct auditinfo_addr *audit_default_aia_p; |
176 | |
177 | /* |
178 | * The remaining kernel functions are conditionally compiled in as they are |
179 | * wrapped by a macro, and the macro should be the only place in the source |
180 | * tree where these functions are referenced. |
181 | */ |
182 | #if CONFIG_AUDIT |
183 | struct ipc_perm; |
184 | struct sockaddr; |
185 | union auditon_udata; |
186 | void audit_arg_addr(struct kaudit_record *ar, user_addr_t addr); |
187 | void audit_arg_exit(struct kaudit_record *ar, int status, int retval); |
188 | void audit_arg_len(struct kaudit_record *ar, user_size_t len); |
189 | void audit_arg_fd(struct kaudit_record *ar, int fd); |
190 | void audit_arg_fd2(struct kaudit_record *ar, int fd); |
191 | void audit_arg_fflags(struct kaudit_record *ar, int fflags); |
192 | void audit_arg_gid(struct kaudit_record *ar, gid_t gid); |
193 | void audit_arg_uid(struct kaudit_record *ar, uid_t uid); |
194 | void audit_arg_egid(struct kaudit_record *ar, gid_t egid); |
195 | void audit_arg_euid(struct kaudit_record *ar, uid_t euid); |
196 | void audit_arg_rgid(struct kaudit_record *ar, gid_t rgid); |
197 | void audit_arg_ruid(struct kaudit_record *ar, uid_t ruid); |
198 | void audit_arg_sgid(struct kaudit_record *ar, gid_t sgid); |
199 | void audit_arg_suid(struct kaudit_record *ar, uid_t suid); |
200 | void audit_arg_groupset(struct kaudit_record *ar, gid_t *gidset, |
201 | u_int gidset_size); |
202 | void audit_arg_login(struct kaudit_record *ar, char *login); |
203 | void audit_arg_ctlname(struct kaudit_record *ar, int *name, int namelen); |
204 | void audit_arg_mask(struct kaudit_record *ar, int mask); |
205 | void audit_arg_mode(struct kaudit_record *ar, mode_t mode); |
206 | void audit_arg_value32(struct kaudit_record *ar, uint32_t value32); |
207 | void audit_arg_value64(struct kaudit_record *ar, uint64_t value64); |
208 | void audit_arg_owner(struct kaudit_record *ar, uid_t uid, gid_t gid); |
209 | void audit_arg_pid(struct kaudit_record *ar, pid_t pid); |
210 | void audit_arg_process(struct kaudit_record *ar, proc_t p); |
211 | void audit_arg_signum(struct kaudit_record *ar, u_int signum); |
212 | void audit_arg_socket(struct kaudit_record *ar, int sodomain, int sotype, |
213 | int soprotocol); |
214 | void audit_arg_sockaddr(struct kaudit_record *ar, struct vnode *cwd_vp, |
215 | struct sockaddr *so); |
216 | void audit_arg_auid(struct kaudit_record *ar, uid_t auid); |
217 | void audit_arg_auditinfo(struct kaudit_record *ar, |
218 | struct auditinfo *au_info); |
219 | void audit_arg_auditinfo_addr(struct kaudit_record *ar, |
220 | struct auditinfo_addr *au_info); |
221 | void audit_arg_upath(struct kaudit_record *ar, struct vnode *cwd_vp, |
222 | char *upath, u_int64_t flags); |
223 | void audit_arg_vnpath(struct kaudit_record *ar, struct vnode *vp, |
224 | u_int64_t flags); |
225 | void audit_arg_vnpath_withref(struct kaudit_record *ar, struct vnode *vp, |
226 | u_int64_t flags); |
227 | void audit_arg_text(struct kaudit_record *ar, char *text); |
228 | void audit_arg_opaque(struct kaudit_record *ar, void *data, size_t size); |
229 | void audit_arg_data(struct kaudit_record *ar, void *data, size_t size, |
230 | size_t number); |
231 | void audit_arg_cmd(struct kaudit_record *ar, int cmd); |
232 | void audit_arg_svipc_cmd(struct kaudit_record *ar, int cmd); |
233 | void audit_arg_svipc_perm(struct kaudit_record *ar, struct ipc_perm *perm); |
234 | void audit_arg_svipc_id(struct kaudit_record *ar, int id); |
235 | void audit_arg_svipc_addr(struct kaudit_record *ar, user_addr_t addr); |
236 | void audit_arg_posix_ipc_perm(struct kaudit_record *ar, uid_t uid, |
237 | gid_t gid, mode_t mode); |
238 | void audit_arg_auditon(struct kaudit_record *ar, |
239 | union auditon_udata *udata); |
240 | void audit_arg_file(struct kaudit_record *ar, struct proc *p, |
241 | struct fileproc *fp); |
242 | void audit_arg_argv(struct kaudit_record *ar, char *argv, int argc, |
243 | int length); |
244 | void audit_arg_envv(struct kaudit_record *ar, char *envv, int envc, |
245 | int length); |
246 | void audit_arg_identity(struct kaudit_record *ar); |
247 | |
248 | void audit_arg_mach_port1(struct kaudit_record *ar, mach_port_name_t port); |
249 | void audit_arg_mach_port2(struct kaudit_record *ar, mach_port_name_t port); |
250 | void audit_sysclose(struct kaudit_record *ar, struct proc *p, int fd); |
251 | |
252 | void audit_proc_coredump(proc_t proc, char *path, int errcode); |
253 | void audit_proc_init(struct proc *p); |
254 | void audit_proc_fork(struct proc *parent, struct proc *child); |
255 | void audit_proc_free(struct proc *p); |
256 | |
257 | #ifndef _KAUTH_CRED_T |
258 | #define _KAUTH_CRED_T |
259 | struct ucred; |
260 | typedef struct ucred *kauth_cred_t; |
261 | #endif /* !_KAUTH_CRED_T */ |
262 | |
263 | void audit_session_ref(kauth_cred_t cred); |
264 | void audit_session_unref(kauth_cred_t cred); |
265 | void audit_session_procnew(proc_t p); |
266 | void audit_session_procexit(proc_t p); |
267 | int audit_session_spawnjoin(proc_t p, task_t task, ipc_port_t port); |
268 | |
269 | void audit_sdev_submit(au_id_t auid, au_asid_t asid, void *record, |
270 | u_int record_len); |
271 | |
272 | /* |
273 | * Audit session macros. |
274 | */ |
275 | #define IS_VALID_SESSION(a) ((a) != NULL && (a) != audit_default_aia_p) |
276 | |
277 | #define AUDIT_SESSION_REF(cred) audit_session_ref(cred) |
278 | #define AUDIT_SESSION_UNREF(cred) audit_session_unref(cred) |
279 | |
280 | #define AUDIT_SESSION_PROCNEW(p) audit_session_procnew(p) |
281 | #define AUDIT_SESSION_PROCEXIT(p) audit_session_procexit(p) |
282 | |
283 | #if CONFIG_MACF |
284 | /* |
285 | * audit_mac_data() is the MAC Framework's entry point to the audit subsystem. |
286 | * It currently creates only text and data audit tokens. |
287 | */ |
288 | int audit_mac_data(int type, int len, u_char *data); |
289 | void audit_arg_mac_string(struct kaudit_record *ar, char *string); |
290 | |
291 | #endif |
292 | |
293 | extern au_event_t sys_au_event[]; |
294 | |
295 | #define AUDIT_RECORD() \ |
296 | ((struct uthread*)get_bsdthread_info(current_thread()))->uu_ar |
297 | |
298 | #ifndef AUDIT_USE_BUILTIN_EXPECT |
299 | #define AUDIT_USE_BUILTIN_EXPECT |
300 | #endif |
301 | |
302 | #ifdef AUDIT_USE_BUILTIN_EXPECT |
303 | /* |
304 | * Use branch prediction for the case of auditing enabled but not |
305 | * auditing system calls. |
306 | */ |
307 | #define AUDIT_SYSCALLS() __builtin_expect(audit_syscalls, 0) |
308 | #define AUDIT_ENABLED() __builtin_expect(audit_syscalls && \ |
309 | audit_enabled, 0) |
310 | #define AUDIT_AUDITING(x) __builtin_expect(NULL != (x), 0) |
311 | |
312 | #else |
313 | |
314 | #define AUDIT_SYSCALLS() (audit_syscalls) |
315 | #define AUDIT_ENABLED() (audit_syscalls && audit_enabled) |
316 | #define AUDIT_AUDITING(x) (NULL != (x)) |
317 | |
318 | #endif /* AUDIT_USE_BUILTIN_EXPECT */ |
319 | |
320 | /* |
321 | * Define a macro to wrap the audit_arg_* calls by checking the global |
322 | * audit_enabled flag before performing the actual call. |
323 | */ |
324 | #define AUDIT_ARG(op, args...) do { \ |
325 | if (AUDIT_SYSCALLS()) { \ |
326 | struct kaudit_record *__ar = AUDIT_RECORD(); \ |
327 | if (AUDIT_AUDITING(__ar)) \ |
328 | audit_arg_ ## op (__ar, ## args); \ |
329 | } \ |
330 | } while (0) |
331 | |
332 | #define AUDIT_SYSCALL_ENTER(args...) do { \ |
333 | if (AUDIT_ENABLED()) { \ |
334 | audit_syscall_enter(args); \ |
335 | } \ |
336 | } while (0) |
337 | |
338 | /* |
339 | * Wrap the audit_syscall_exit() function so that it is called only when |
340 | * we have a audit record on the thread. Audit records can persist after |
341 | * auditing is disabled, so we don't just check audit_enabled here. |
342 | */ |
343 | #define AUDIT_SYSCALL_EXIT(code, proc, uthread, error) do { \ |
344 | if (AUDIT_AUDITING(uthread->uu_ar)) \ |
345 | audit_syscall_exit(code, error, proc, uthread); \ |
346 | } while (0) |
347 | |
348 | /* |
349 | * Wrap the audit_mach_syscall_enter() and audit_mach_syscall_exit() |
350 | * functions in a manner similar to other system call enter/exit functions. |
351 | */ |
352 | #define AUDIT_MACH_SYSCALL_ENTER(args...) do { \ |
353 | if (AUDIT_ENABLED()) { \ |
354 | audit_mach_syscall_enter(args); \ |
355 | } \ |
356 | } while (0) |
357 | |
358 | #define AUDIT_MACH_SYSCALL_EXIT(retval) do { \ |
359 | if (AUDIT_SYSCALLS()) { \ |
360 | struct uthread *__uthread = \ |
361 | get_bsdthread_info(current_thread()); \ |
362 | if (AUDIT_AUDITING(__uthread->uu_ar)) \ |
363 | audit_mach_syscall_exit(retval, __uthread); \ |
364 | } \ |
365 | } while (0) |
366 | |
367 | /* |
368 | * A Macro to wrap the audit_sysclose() function. |
369 | */ |
370 | #define AUDIT_SYSCLOSE(args...) do { \ |
371 | if (AUDIT_SYSCALLS()) { \ |
372 | struct kaudit_record *__ar = AUDIT_RECORD(); \ |
373 | if (AUDIT_AUDITING(__ar)) \ |
374 | audit_sysclose(__ar, args); \ |
375 | } \ |
376 | } while (0) |
377 | |
378 | #else /* !CONFIG_AUDIT */ |
379 | |
380 | #define AUDIT_ARG(op, args...) do { \ |
381 | } while (0) |
382 | |
383 | #define AUDIT_SYSCALL_ENTER(args...) do { \ |
384 | } while (0) |
385 | |
386 | #define AUDIT_SYSCALL_EXIT(code, proc, uthread, error) do { \ |
387 | } while (0) |
388 | |
389 | #define AUDIT_MACH_SYSCALL_ENTER(args...) do { \ |
390 | } while (0) |
391 | |
392 | #define AUDIT_MACH_SYSCALL_EXIT(retval) do { \ |
393 | } while (0) |
394 | |
395 | #define AUDIT_SYSCLOSE(op, args...) do { \ |
396 | } while (0) |
397 | |
398 | #define AUDIT_SESSION_REF(cred) do { \ |
399 | } while (0) |
400 | |
401 | #define AUDIT_SESSION_UNREF(cred) do { \ |
402 | } while (0) |
403 | |
404 | #define AUDIT_SESSION_PROCNEW(cred) do { \ |
405 | } while (0) |
406 | |
407 | #define AUDIT_SESSION_PROCEXIT(cred) do { \ |
408 | } while (0) |
409 | |
410 | #define AUDIT_SESSION_REF(cred) do { \ |
411 | } while (0) |
412 | |
413 | #define AUDIT_SESSION_UNREF(cred) do { \ |
414 | } while (0) |
415 | |
416 | #define AUDIT_SESSION_PROCNEW(cred) do { \ |
417 | } while (0) |
418 | |
419 | #define AUDIT_SESSION_PROCEXIT(cred) do { \ |
420 | } while (0) |
421 | |
422 | #endif /* CONFIG_AUDIT */ |
423 | |
424 | #endif /* KERNEL */ |
425 | |
426 | #endif /* !_SECURITY_AUDIT_ADUIT_H */ |
427 | |