1 /*-
2 * Copyright (c) 1999-2005 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 * $FreeBSD: releng/9.1/sys/security/audit/audit.h 224181 2011-07-18 12:58:18Z jonathan $
30 */
31
32 /*
33 * This header includes function prototypes and type definitions that are
34 * necessary for the kernel as a whole to interact with the audit subsystem.
35 */
36
37 #ifndef _SECURITY_AUDIT_KERNEL_H_
38 #define _SECURITY_AUDIT_KERNEL_H_
39
40 #ifndef _KERNEL
41 #error "no user-serviceable parts inside"
42 #endif
43
44 #include <bsm/audit.h>
45
46 #include <sys/file.h>
47 #include <sys/sysctl.h>
48
49 /*
50 * Audit subsystem condition flags. The audit_enabled flag is set and
51 * removed automatically as a result of configuring log files, and can be
52 * observed but should not be directly manipulated. The audit suspension
53 * flag permits audit to be temporarily disabled without reconfiguring the
54 * audit target.
55 */
56 extern int audit_enabled;
57 extern int audit_suspended;
58
59 void audit_syscall_enter(unsigned short code, struct thread *td);
60 void audit_syscall_exit(int error, struct thread *td);
61
62 /*
63 * The remaining kernel functions are conditionally compiled in as they are
64 * wrapped by a macro, and the macro should be the only place in the source
65 * tree where these functions are referenced.
66 */
67 #ifdef AUDIT
68 struct ipc_perm;
69 struct sockaddr;
70 union auditon_udata;
71 void audit_arg_addr(void * addr);
72 void audit_arg_exit(int status, int retval);
73 void audit_arg_len(int len);
74 void audit_arg_atfd1(int atfd);
75 void audit_arg_atfd2(int atfd);
76 void audit_arg_fd(int fd);
77 void audit_arg_fflags(int fflags);
78 void audit_arg_gid(gid_t gid);
79 void audit_arg_uid(uid_t uid);
80 void audit_arg_egid(gid_t egid);
81 void audit_arg_euid(uid_t euid);
82 void audit_arg_rgid(gid_t rgid);
83 void audit_arg_ruid(uid_t ruid);
84 void audit_arg_sgid(gid_t sgid);
85 void audit_arg_suid(uid_t suid);
86 void audit_arg_groupset(gid_t *gidset, u_int gidset_size);
87 void audit_arg_login(char *login);
88 void audit_arg_ctlname(int *name, int namelen);
89 void audit_arg_mask(int mask);
90 void audit_arg_mode(mode_t mode);
91 void audit_arg_dev(int dev);
92 void audit_arg_value(long value);
93 void audit_arg_owner(uid_t uid, gid_t gid);
94 void audit_arg_pid(pid_t pid);
95 void audit_arg_process(struct proc *p);
96 void audit_arg_signum(u_int signum);
97 void audit_arg_socket(int sodomain, int sotype, int soprotocol);
98 void audit_arg_sockaddr(struct thread *td, struct sockaddr *sa);
99 void audit_arg_auid(uid_t auid);
100 void audit_arg_auditinfo(struct auditinfo *au_info);
101 void audit_arg_auditinfo_addr(struct auditinfo_addr *au_info);
102 void audit_arg_upath1(struct thread *td, char *upath);
103 void audit_arg_upath2(struct thread *td, char *upath);
104 void audit_arg_vnode1(struct vnode *vp);
105 void audit_arg_vnode2(struct vnode *vp);
106 void audit_arg_text(char *text);
107 void audit_arg_cmd(int cmd);
108 void audit_arg_svipc_cmd(int cmd);
109 void audit_arg_svipc_perm(struct ipc_perm *perm);
110 void audit_arg_svipc_id(int id);
111 void audit_arg_svipc_addr(void *addr);
112 void audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode);
113 void audit_arg_auditon(union auditon_udata *udata);
114 void audit_arg_file(struct proc *p, struct file *fp);
115 void audit_arg_argv(char *argv, int argc, int length);
116 void audit_arg_envv(char *envv, int envc, int length);
117 void audit_arg_rights(cap_rights_t rights);
118 void audit_sysclose(struct thread *td, int fd);
119 void audit_cred_copy(struct ucred *src, struct ucred *dest);
120 void audit_cred_destroy(struct ucred *cred);
121 void audit_cred_init(struct ucred *cred);
122 void audit_cred_kproc0(struct ucred *cred);
123 void audit_cred_proc1(struct ucred *cred);
124 void audit_proc_coredump(struct thread *td, char *path, int errcode);
125 void audit_thread_alloc(struct thread *td);
126 void audit_thread_free(struct thread *td);
127
128 /*
129 * Define macros to wrap the audit_arg_* calls by checking the global
130 * audit_enabled flag before performing the actual call.
131 */
132 #define AUDITING_TD(td) ((td)->td_pflags & TDP_AUDITREC)
133
134 #define AUDIT_ARG_ADDR(addr) do { \
135 if (AUDITING_TD(curthread)) \
136 audit_arg_addr((addr)); \
137 } while (0)
138
139 #define AUDIT_ARG_ARGV(argv, argc, length) do { \
140 if (AUDITING_TD(curthread)) \
141 audit_arg_argv((argv), (argc), (length)); \
142 } while (0)
143
144 #define AUDIT_ARG_ATFD1(atfd) do { \
145 if (AUDITING_TD(curthread)) \
146 audit_arg_atfd1((atfd)); \
147 } while (0)
148
149 #define AUDIT_ARG_ATFD2(atfd) do { \
150 if (AUDITING_TD(curthread)) \
151 audit_arg_atfd2((atfd)); \
152 } while (0)
153
154 #define AUDIT_ARG_AUDITON(udata) do { \
155 if (AUDITING_TD(curthread)) \
156 audit_arg_auditon((udata)); \
157 } while (0)
158
159 #define AUDIT_ARG_CMD(cmd) do { \
160 if (AUDITING_TD(curthread)) \
161 audit_arg_cmd((cmd)); \
162 } while (0)
163
164 #define AUDIT_ARG_DEV(dev) do { \
165 if (AUDITING_TD(curthread)) \
166 audit_arg_dev((dev)); \
167 } while (0)
168
169 #define AUDIT_ARG_EGID(egid) do { \
170 if (AUDITING_TD(curthread)) \
171 audit_arg_egid((egid)); \
172 } while (0)
173
174 #define AUDIT_ARG_ENVV(envv, envc, length) do { \
175 if (AUDITING_TD(curthread)) \
176 audit_arg_envv((envv), (envc), (length)); \
177 } while (0)
178
179 #define AUDIT_ARG_EXIT(status, retval) do { \
180 if (AUDITING_TD(curthread)) \
181 audit_arg_exit((status), (retval)); \
182 } while (0)
183
184 #define AUDIT_ARG_EUID(euid) do { \
185 if (AUDITING_TD(curthread)) \
186 audit_arg_euid((euid)); \
187 } while (0)
188
189 #define AUDIT_ARG_FD(fd) do { \
190 if (AUDITING_TD(curthread)) \
191 audit_arg_fd((fd)); \
192 } while (0)
193
194 #define AUDIT_ARG_FILE(p, fp) do { \
195 if (AUDITING_TD(curthread)) \
196 audit_arg_file((p), (fp)); \
197 } while (0)
198
199 #define AUDIT_ARG_FFLAGS(fflags) do { \
200 if (AUDITING_TD(curthread)) \
201 audit_arg_fflags((fflags)); \
202 } while (0)
203
204 #define AUDIT_ARG_GID(gid) do { \
205 if (AUDITING_TD(curthread)) \
206 audit_arg_gid((gid)); \
207 } while (0)
208
209 #define AUDIT_ARG_GROUPSET(gidset, gidset_size) do { \
210 if (AUDITING_TD(curthread)) \
211 audit_arg_groupset((gidset), (gidset_size)); \
212 } while (0)
213
214 #define AUDIT_ARG_MODE(mode) do { \
215 if (AUDITING_TD(curthread)) \
216 audit_arg_mode((mode)); \
217 } while (0)
218
219 #define AUDIT_ARG_OWNER(uid, gid) do { \
220 if (AUDITING_TD(curthread)) \
221 audit_arg_owner((uid), (gid)); \
222 } while (0)
223
224 #define AUDIT_ARG_PID(pid) do { \
225 if (AUDITING_TD(curthread)) \
226 audit_arg_pid((pid)); \
227 } while (0)
228
229 #define AUDIT_ARG_PROCESS(p) do { \
230 if (AUDITING_TD(curthread)) \
231 audit_arg_process((p)); \
232 } while (0)
233
234 #define AUDIT_ARG_RGID(rgid) do { \
235 if (AUDITING_TD(curthread)) \
236 audit_arg_rgid((rgid)); \
237 } while (0)
238
239 #define AUDIT_ARG_RIGHTS(rights) do { \
240 if (AUDITING_TD(curthread)) \
241 audit_arg_rights((rights)); \
242 } while (0)
243
244 #define AUDIT_ARG_RUID(ruid) do { \
245 if (AUDITING_TD(curthread)) \
246 audit_arg_ruid((ruid)); \
247 } while (0)
248
249 #define AUDIT_ARG_SIGNUM(signum) do { \
250 if (AUDITING_TD(curthread)) \
251 audit_arg_signum((signum)); \
252 } while (0)
253
254 #define AUDIT_ARG_SGID(sgid) do { \
255 if (AUDITING_TD(curthread)) \
256 audit_arg_sgid((sgid)); \
257 } while (0)
258
259 #define AUDIT_ARG_SOCKET(sodomain, sotype, soprotocol) do { \
260 if (AUDITING_TD(curthread)) \
261 audit_arg_socket((sodomain), (sotype), (soprotocol)); \
262 } while (0)
263
264 #define AUDIT_ARG_SUID(suid) do { \
265 if (AUDITING_TD(curthread)) \
266 audit_arg_suid((suid)); \
267 } while (0)
268
269 #define AUDIT_ARG_TEXT(text) do { \
270 if (AUDITING_TD(curthread)) \
271 audit_arg_text((text)); \
272 } while (0)
273
274 #define AUDIT_ARG_UID(uid) do { \
275 if (AUDITING_TD(curthread)) \
276 audit_arg_uid((uid)); \
277 } while (0)
278
279 #define AUDIT_ARG_UPATH1(td, upath) do { \
280 if (AUDITING_TD(curthread)) \
281 audit_arg_upath1((td), (upath)); \
282 } while (0)
283
284 #define AUDIT_ARG_UPATH2(td, upath) do { \
285 if (AUDITING_TD(curthread)) \
286 audit_arg_upath2((td), (upath)); \
287 } while (0)
288
289 #define AUDIT_ARG_VALUE(value) do { \
290 if (AUDITING_TD(curthread)) \
291 audit_arg_value((value)); \
292 } while (0)
293
294 #define AUDIT_ARG_VNODE1(vp) do { \
295 if (AUDITING_TD(curthread)) \
296 audit_arg_vnode1((vp)); \
297 } while (0)
298
299 #define AUDIT_ARG_VNODE2(vp) do { \
300 if (AUDITING_TD(curthread)) \
301 audit_arg_vnode2((vp)); \
302 } while (0)
303
304 #define AUDIT_SYSCALL_ENTER(code, td) do { \
305 if (audit_enabled) { \
306 audit_syscall_enter(code, td); \
307 } \
308 } while (0)
309
310 /*
311 * Wrap the audit_syscall_exit() function so that it is called only when
312 * we have a audit record on the thread. Audit records can persist after
313 * auditing is disabled, so we don't just check audit_enabled here.
314 */
315 #define AUDIT_SYSCALL_EXIT(error, td) do { \
316 if (td->td_pflags & TDP_AUDITREC) \
317 audit_syscall_exit(error, td); \
318 } while (0)
319
320 /*
321 * A Macro to wrap the audit_sysclose() function.
322 */
323 #define AUDIT_SYSCLOSE(td, fd) do { \
324 if (td->td_pflags & TDP_AUDITREC) \
325 audit_sysclose(td, fd); \
326 } while (0)
327
328 #else /* !AUDIT */
329
330 #define AUDIT_ARG_ADDR(addr)
331 #define AUDIT_ARG_ARGV(argv, argc, length)
332 #define AUDIT_ARG_ATFD1(atfd)
333 #define AUDIT_ARG_ATFD2(atfd)
334 #define AUDIT_ARG_AUDITON(udata)
335 #define AUDIT_ARG_CMD(cmd)
336 #define AUDIT_ARG_DEV(dev)
337 #define AUDIT_ARG_EGID(egid)
338 #define AUDIT_ARG_ENVV(envv, envc, length)
339 #define AUDIT_ARG_EXIT(status, retval)
340 #define AUDIT_ARG_EUID(euid)
341 #define AUDIT_ARG_FD(fd)
342 #define AUDIT_ARG_FILE(p, fp)
343 #define AUDIT_ARG_FFLAGS(fflags)
344 #define AUDIT_ARG_GID(gid)
345 #define AUDIT_ARG_GROUPSET(gidset, gidset_size)
346 #define AUDIT_ARG_MODE(mode)
347 #define AUDIT_ARG_OWNER(uid, gid)
348 #define AUDIT_ARG_PID(pid)
349 #define AUDIT_ARG_PROCESS(p)
350 #define AUDIT_ARG_RGID(rgid)
351 #define AUDIT_ARG_RIGHTS(rights)
352 #define AUDIT_ARG_RUID(ruid)
353 #define AUDIT_ARG_SIGNUM(signum)
354 #define AUDIT_ARG_SGID(sgid)
355 #define AUDIT_ARG_SOCKET(sodomain, sotype, soprotocol)
356 #define AUDIT_ARG_SUID(suid)
357 #define AUDIT_ARG_TEXT(text)
358 #define AUDIT_ARG_UID(uid)
359 #define AUDIT_ARG_UPATH1(td, upath)
360 #define AUDIT_ARG_UPATH2(td, upath)
361 #define AUDIT_ARG_VALUE(value)
362 #define AUDIT_ARG_VNODE1(vp)
363 #define AUDIT_ARG_VNODE2(vp)
364
365 #define AUDIT_SYSCALL_ENTER(code, td)
366 #define AUDIT_SYSCALL_EXIT(error, td)
367
368 #define AUDIT_SYSCLOSE(p, fd)
369
370 #endif /* AUDIT */
371
372 #endif /* !_SECURITY_AUDIT_KERNEL_H_ */
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