Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
audit.h
Go to the documentation of this file.
1 /* audit.h -- Auditing support
2  *
3  * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
4  * All Rights Reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  * Written by Rickard E. (Rik) Faith <[email protected]>
21  *
22  */
23 
24 #ifndef _UAPI_LINUX_AUDIT_H_
25 #define _UAPI_LINUX_AUDIT_H_
26 
27 #include <linux/types.h>
28 #include <linux/elf-em.h>
29 #include <linux/ptrace.h>
30 
31 /* The netlink messages for the audit system is divided into blocks:
32  * 1000 - 1099 are for commanding the audit system
33  * 1100 - 1199 user space trusted application messages
34  * 1200 - 1299 messages internal to the audit daemon
35  * 1300 - 1399 audit event messages
36  * 1400 - 1499 SE Linux use
37  * 1500 - 1599 kernel LSPP events
38  * 1600 - 1699 kernel crypto events
39  * 1700 - 1799 kernel anomaly records
40  * 1800 - 1899 kernel integrity events
41  * 1900 - 1999 future kernel use
42  * 2000 is for otherwise unclassified kernel audit messages (legacy)
43  * 2001 - 2099 unused (kernel)
44  * 2100 - 2199 user space anomaly records
45  * 2200 - 2299 user space actions taken in response to anomalies
46  * 2300 - 2399 user space generated LSPP events
47  * 2400 - 2499 user space crypto events
48  * 2500 - 2999 future user space (maybe integrity labels and related events)
49  *
50  * Messages from 1000-1199 are bi-directional. 1200-1299 & 2100 - 2999 are
51  * exclusively user space. 1300-2099 is kernel --> user space
52  * communication.
53  */
54 #define AUDIT_GET 1000 /* Get status */
55 #define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */
56 #define AUDIT_LIST 1002 /* List syscall rules -- deprecated */
57 #define AUDIT_ADD 1003 /* Add syscall rule -- deprecated */
58 #define AUDIT_DEL 1004 /* Delete syscall rule -- deprecated */
59 #define AUDIT_USER 1005 /* Message from userspace -- deprecated */
60 #define AUDIT_LOGIN 1006 /* Define the login id and information */
61 #define AUDIT_WATCH_INS 1007 /* Insert file/dir watch entry */
62 #define AUDIT_WATCH_REM 1008 /* Remove file/dir watch entry */
63 #define AUDIT_WATCH_LIST 1009 /* List all file/dir watches */
64 #define AUDIT_SIGNAL_INFO 1010 /* Get info about sender of signal to auditd */
65 #define AUDIT_ADD_RULE 1011 /* Add syscall filtering rule */
66 #define AUDIT_DEL_RULE 1012 /* Delete syscall filtering rule */
67 #define AUDIT_LIST_RULES 1013 /* List syscall filtering rules */
68 #define AUDIT_TRIM 1014 /* Trim junk from watched tree */
69 #define AUDIT_MAKE_EQUIV 1015 /* Append to watched tree */
70 #define AUDIT_TTY_GET 1016 /* Get TTY auditing status */
71 #define AUDIT_TTY_SET 1017 /* Set TTY auditing status */
72 
73 #define AUDIT_FIRST_USER_MSG 1100 /* Userspace messages mostly uninteresting to kernel */
74 #define AUDIT_USER_AVC 1107 /* We filter this differently */
75 #define AUDIT_USER_TTY 1124 /* Non-ICANON TTY input meaning */
76 #define AUDIT_LAST_USER_MSG 1199
77 #define AUDIT_FIRST_USER_MSG2 2100 /* More user space messages */
78 #define AUDIT_LAST_USER_MSG2 2999
79 
80 #define AUDIT_DAEMON_START 1200 /* Daemon startup record */
81 #define AUDIT_DAEMON_END 1201 /* Daemon normal stop record */
82 #define AUDIT_DAEMON_ABORT 1202 /* Daemon error stop record */
83 #define AUDIT_DAEMON_CONFIG 1203 /* Daemon config change */
84 
85 #define AUDIT_SYSCALL 1300 /* Syscall event */
86 /* #define AUDIT_FS_WATCH 1301 * Deprecated */
87 #define AUDIT_PATH 1302 /* Filename path information */
88 #define AUDIT_IPC 1303 /* IPC record */
89 #define AUDIT_SOCKETCALL 1304 /* sys_socketcall arguments */
90 #define AUDIT_CONFIG_CHANGE 1305 /* Audit system configuration change */
91 #define AUDIT_SOCKADDR 1306 /* sockaddr copied as syscall arg */
92 #define AUDIT_CWD 1307 /* Current working directory */
93 #define AUDIT_EXECVE 1309 /* execve arguments */
94 #define AUDIT_IPC_SET_PERM 1311 /* IPC new permissions record type */
95 #define AUDIT_MQ_OPEN 1312 /* POSIX MQ open record type */
96 #define AUDIT_MQ_SENDRECV 1313 /* POSIX MQ send/receive record type */
97 #define AUDIT_MQ_NOTIFY 1314 /* POSIX MQ notify record type */
98 #define AUDIT_MQ_GETSETATTR 1315 /* POSIX MQ get/set attribute record type */
99 #define AUDIT_KERNEL_OTHER 1316 /* For use by 3rd party modules */
100 #define AUDIT_FD_PAIR 1317 /* audit record for pipe/socketpair */
101 #define AUDIT_OBJ_PID 1318 /* ptrace target */
102 #define AUDIT_TTY 1319 /* Input on an administrative TTY */
103 #define AUDIT_EOE 1320 /* End of multi-record event */
104 #define AUDIT_BPRM_FCAPS 1321 /* Information about fcaps increasing perms */
105 #define AUDIT_CAPSET 1322 /* Record showing argument to sys_capset */
106 #define AUDIT_MMAP 1323 /* Record showing descriptor and flags in mmap */
107 #define AUDIT_NETFILTER_PKT 1324 /* Packets traversing netfilter chains */
108 #define AUDIT_NETFILTER_CFG 1325 /* Netfilter chain modifications */
109 
110 #define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
111 #define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
112 #define AUDIT_AVC_PATH 1402 /* dentry, vfsmount pair from avc */
113 #define AUDIT_MAC_POLICY_LOAD 1403 /* Policy file load */
114 #define AUDIT_MAC_STATUS 1404 /* Changed enforcing,permissive,off */
115 #define AUDIT_MAC_CONFIG_CHANGE 1405 /* Changes to booleans */
116 #define AUDIT_MAC_UNLBL_ALLOW 1406 /* NetLabel: allow unlabeled traffic */
117 #define AUDIT_MAC_CIPSOV4_ADD 1407 /* NetLabel: add CIPSOv4 DOI entry */
118 #define AUDIT_MAC_CIPSOV4_DEL 1408 /* NetLabel: del CIPSOv4 DOI entry */
119 #define AUDIT_MAC_MAP_ADD 1409 /* NetLabel: add LSM domain mapping */
120 #define AUDIT_MAC_MAP_DEL 1410 /* NetLabel: del LSM domain mapping */
121 #define AUDIT_MAC_IPSEC_ADDSA 1411 /* Not used */
122 #define AUDIT_MAC_IPSEC_DELSA 1412 /* Not used */
123 #define AUDIT_MAC_IPSEC_ADDSPD 1413 /* Not used */
124 #define AUDIT_MAC_IPSEC_DELSPD 1414 /* Not used */
125 #define AUDIT_MAC_IPSEC_EVENT 1415 /* Audit an IPSec event */
126 #define AUDIT_MAC_UNLBL_STCADD 1416 /* NetLabel: add a static label */
127 #define AUDIT_MAC_UNLBL_STCDEL 1417 /* NetLabel: del a static label */
128 
129 #define AUDIT_FIRST_KERN_ANOM_MSG 1700
130 #define AUDIT_LAST_KERN_ANOM_MSG 1799
131 #define AUDIT_ANOM_PROMISCUOUS 1700 /* Device changed promiscuous mode */
132 #define AUDIT_ANOM_ABEND 1701 /* Process ended abnormally */
133 #define AUDIT_ANOM_LINK 1702 /* Suspicious use of file links */
134 #define AUDIT_INTEGRITY_DATA 1800 /* Data integrity verification */
135 #define AUDIT_INTEGRITY_METADATA 1801 /* Metadata integrity verification */
136 #define AUDIT_INTEGRITY_STATUS 1802 /* Integrity enable status */
137 #define AUDIT_INTEGRITY_HASH 1803 /* Integrity HASH type */
138 #define AUDIT_INTEGRITY_PCR 1804 /* PCR invalidation msgs */
139 #define AUDIT_INTEGRITY_RULE 1805 /* policy rule */
140 
141 #define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
142 
143 /* Rule flags */
144 #define AUDIT_FILTER_USER 0x00 /* Apply rule to user-generated messages */
145 #define AUDIT_FILTER_TASK 0x01 /* Apply rule at task creation (not syscall) */
146 #define AUDIT_FILTER_ENTRY 0x02 /* Apply rule at syscall entry */
147 #define AUDIT_FILTER_WATCH 0x03 /* Apply rule to file system watches */
148 #define AUDIT_FILTER_EXIT 0x04 /* Apply rule at syscall exit */
149 #define AUDIT_FILTER_TYPE 0x05 /* Apply rule at audit_log_start */
150 
151 #define AUDIT_NR_FILTERS 6
152 
153 #define AUDIT_FILTER_PREPEND 0x10 /* Prepend to front of list */
154 
155 /* Rule actions */
156 #define AUDIT_NEVER 0 /* Do not build context if rule matches */
157 #define AUDIT_POSSIBLE 1 /* Build context if rule matches */
158 #define AUDIT_ALWAYS 2 /* Generate audit record if rule matches */
159 
160 /* Rule structure sizes -- if these change, different AUDIT_ADD and
161  * AUDIT_LIST commands must be implemented. */
162 #define AUDIT_MAX_FIELDS 64
163 #define AUDIT_MAX_KEY_LEN 256
164 #define AUDIT_BITMASK_SIZE 64
165 #define AUDIT_WORD(nr) ((__u32)((nr)/32))
166 #define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32))
167 
168 #define AUDIT_SYSCALL_CLASSES 16
169 #define AUDIT_CLASS_DIR_WRITE 0
170 #define AUDIT_CLASS_DIR_WRITE_32 1
171 #define AUDIT_CLASS_CHATTR 2
172 #define AUDIT_CLASS_CHATTR_32 3
173 #define AUDIT_CLASS_READ 4
174 #define AUDIT_CLASS_READ_32 5
175 #define AUDIT_CLASS_WRITE 6
176 #define AUDIT_CLASS_WRITE_32 7
177 #define AUDIT_CLASS_SIGNAL 8
178 #define AUDIT_CLASS_SIGNAL_32 9
179 
180 /* This bitmask is used to validate user input. It represents all bits that
181  * are currently used in an audit field constant understood by the kernel.
182  * If you are adding a new #define AUDIT_<whatever>, please ensure that
183  * AUDIT_UNUSED_BITS is updated if need be. */
184 #define AUDIT_UNUSED_BITS 0x07FFFC00
185 
186 /* AUDIT_FIELD_COMPARE rule list */
187 #define AUDIT_COMPARE_UID_TO_OBJ_UID 1
188 #define AUDIT_COMPARE_GID_TO_OBJ_GID 2
189 #define AUDIT_COMPARE_EUID_TO_OBJ_UID 3
190 #define AUDIT_COMPARE_EGID_TO_OBJ_GID 4
191 #define AUDIT_COMPARE_AUID_TO_OBJ_UID 5
192 #define AUDIT_COMPARE_SUID_TO_OBJ_UID 6
193 #define AUDIT_COMPARE_SGID_TO_OBJ_GID 7
194 #define AUDIT_COMPARE_FSUID_TO_OBJ_UID 8
195 #define AUDIT_COMPARE_FSGID_TO_OBJ_GID 9
196 
197 #define AUDIT_COMPARE_UID_TO_AUID 10
198 #define AUDIT_COMPARE_UID_TO_EUID 11
199 #define AUDIT_COMPARE_UID_TO_FSUID 12
200 #define AUDIT_COMPARE_UID_TO_SUID 13
201 
202 #define AUDIT_COMPARE_AUID_TO_FSUID 14
203 #define AUDIT_COMPARE_AUID_TO_SUID 15
204 #define AUDIT_COMPARE_AUID_TO_EUID 16
205 
206 #define AUDIT_COMPARE_EUID_TO_SUID 17
207 #define AUDIT_COMPARE_EUID_TO_FSUID 18
208 
209 #define AUDIT_COMPARE_SUID_TO_FSUID 19
210 
211 #define AUDIT_COMPARE_GID_TO_EGID 20
212 #define AUDIT_COMPARE_GID_TO_FSGID 21
213 #define AUDIT_COMPARE_GID_TO_SGID 22
214 
215 #define AUDIT_COMPARE_EGID_TO_FSGID 23
216 #define AUDIT_COMPARE_EGID_TO_SGID 24
217 #define AUDIT_COMPARE_SGID_TO_FSGID 25
218 
219 #define AUDIT_MAX_FIELD_COMPARE AUDIT_COMPARE_SGID_TO_FSGID
220 
221 /* Rule fields */
222  /* These are useful when checking the
223  * task structure at task creation time
224  * (AUDIT_PER_TASK). */
225 #define AUDIT_PID 0
226 #define AUDIT_UID 1
227 #define AUDIT_EUID 2
228 #define AUDIT_SUID 3
229 #define AUDIT_FSUID 4
230 #define AUDIT_GID 5
231 #define AUDIT_EGID 6
232 #define AUDIT_SGID 7
233 #define AUDIT_FSGID 8
234 #define AUDIT_LOGINUID 9
235 #define AUDIT_PERS 10
236 #define AUDIT_ARCH 11
237 #define AUDIT_MSGTYPE 12
238 #define AUDIT_SUBJ_USER 13 /* security label user */
239 #define AUDIT_SUBJ_ROLE 14 /* security label role */
240 #define AUDIT_SUBJ_TYPE 15 /* security label type */
241 #define AUDIT_SUBJ_SEN 16 /* security label sensitivity label */
242 #define AUDIT_SUBJ_CLR 17 /* security label clearance label */
243 #define AUDIT_PPID 18
244 #define AUDIT_OBJ_USER 19
245 #define AUDIT_OBJ_ROLE 20
246 #define AUDIT_OBJ_TYPE 21
247 #define AUDIT_OBJ_LEV_LOW 22
248 #define AUDIT_OBJ_LEV_HIGH 23
249 
250  /* These are ONLY useful when checking
251  * at syscall exit time (AUDIT_AT_EXIT). */
252 #define AUDIT_DEVMAJOR 100
253 #define AUDIT_DEVMINOR 101
254 #define AUDIT_INODE 102
255 #define AUDIT_EXIT 103
256 #define AUDIT_SUCCESS 104 /* exit >= 0; value ignored */
257 #define AUDIT_WATCH 105
258 #define AUDIT_PERM 106
259 #define AUDIT_DIR 107
260 #define AUDIT_FILETYPE 108
261 #define AUDIT_OBJ_UID 109
262 #define AUDIT_OBJ_GID 110
263 #define AUDIT_FIELD_COMPARE 111
264 
265 #define AUDIT_ARG0 200
266 #define AUDIT_ARG1 (AUDIT_ARG0+1)
267 #define AUDIT_ARG2 (AUDIT_ARG0+2)
268 #define AUDIT_ARG3 (AUDIT_ARG0+3)
269 
270 #define AUDIT_FILTERKEY 210
271 
272 #define AUDIT_NEGATE 0x80000000
273 
274 /* These are the supported operators.
275  * 4 2 1 8
276  * = > < ?
277  * ----------
278  * 0 0 0 0 00 nonsense
279  * 0 0 0 1 08 & bit mask
280  * 0 0 1 0 10 <
281  * 0 1 0 0 20 >
282  * 0 1 1 0 30 !=
283  * 1 0 0 0 40 =
284  * 1 0 0 1 48 &= bit test
285  * 1 0 1 0 50 <=
286  * 1 1 0 0 60 >=
287  * 1 1 1 1 78 all operators
288  */
289 #define AUDIT_BIT_MASK 0x08000000
290 #define AUDIT_LESS_THAN 0x10000000
291 #define AUDIT_GREATER_THAN 0x20000000
292 #define AUDIT_NOT_EQUAL 0x30000000
293 #define AUDIT_EQUAL 0x40000000
294 #define AUDIT_BIT_TEST (AUDIT_BIT_MASK|AUDIT_EQUAL)
295 #define AUDIT_LESS_THAN_OR_EQUAL (AUDIT_LESS_THAN|AUDIT_EQUAL)
296 #define AUDIT_GREATER_THAN_OR_EQUAL (AUDIT_GREATER_THAN|AUDIT_EQUAL)
297 #define AUDIT_OPERATORS (AUDIT_EQUAL|AUDIT_NOT_EQUAL|AUDIT_BIT_MASK)
298 
299 enum {
309 };
310 
311 /* Status symbols */
312  /* Mask values */
313 #define AUDIT_STATUS_ENABLED 0x0001
314 #define AUDIT_STATUS_FAILURE 0x0002
315 #define AUDIT_STATUS_PID 0x0004
316 #define AUDIT_STATUS_RATE_LIMIT 0x0008
317 #define AUDIT_STATUS_BACKLOG_LIMIT 0x0010
318  /* Failure-to-log actions */
319 #define AUDIT_FAIL_SILENT 0
320 #define AUDIT_FAIL_PRINTK 1
321 #define AUDIT_FAIL_PANIC 2
322 
323 /* distinguish syscall tables */
324 #define __AUDIT_ARCH_64BIT 0x80000000
325 #define __AUDIT_ARCH_LE 0x40000000
326 #define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
327 #define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE)
328 #define AUDIT_ARCH_ARMEB (EM_ARM)
329 #define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE)
330 #define AUDIT_ARCH_FRV (EM_FRV)
331 #define AUDIT_ARCH_H8300 (EM_H8_300)
332 #define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
333 #define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
334 #define AUDIT_ARCH_M32R (EM_M32R)
335 #define AUDIT_ARCH_M68K (EM_68K)
336 #define AUDIT_ARCH_MIPS (EM_MIPS)
337 #define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
338 #define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
339 #define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
340 #define AUDIT_ARCH_OPENRISC (EM_OPENRISC)
341 #define AUDIT_ARCH_PARISC (EM_PARISC)
342 #define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
343 #define AUDIT_ARCH_PPC (EM_PPC)
344 #define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
345 #define AUDIT_ARCH_S390 (EM_S390)
346 #define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
347 #define AUDIT_ARCH_SH (EM_SH)
348 #define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE)
349 #define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT)
350 #define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
351 #define AUDIT_ARCH_SPARC (EM_SPARC)
352 #define AUDIT_ARCH_SPARC64 (EM_SPARCV9|__AUDIT_ARCH_64BIT)
353 #define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
354 
355 #define AUDIT_PERM_EXEC 1
356 #define AUDIT_PERM_WRITE 2
357 #define AUDIT_PERM_READ 4
358 #define AUDIT_PERM_ATTR 8
359 
360 struct audit_status {
361  __u32 mask; /* Bit mask for valid entries */
362  __u32 enabled; /* 1 = enabled, 0 = disabled */
363  __u32 failure; /* Failure-to-log action */
364  __u32 pid; /* pid of auditd process */
365  __u32 rate_limit; /* messages rate limit (per second) */
366  __u32 backlog_limit; /* waiting messages limit */
367  __u32 lost; /* messages lost */
368  __u32 backlog; /* messages waiting in queue */
369 };
370 
372  __u32 enabled; /* 1 = enabled, 0 = disabled */
373 };
374 
375 /* audit_rule_data supports filter rules with both integer and string
376  * fields. It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and
377  * AUDIT_LIST_RULES requests.
378  */
380  __u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
381  __u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
383  __u32 mask[AUDIT_BITMASK_SIZE]; /* syscall(s) affected */
387  __u32 buflen; /* total length of string fields */
388  char buf[0]; /* string fields buffer */
389 };
390 
391 /* audit_rule is supported to maintain backward compatibility with
392  * userspace. It supports integer fields only and corresponds to
393  * AUDIT_ADD, AUDIT_DEL and AUDIT_LIST requests.
394  */
395 struct audit_rule { /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
396  __u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
397  __u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
402 };
403 
404 #endif /* _UAPI_LINUX_AUDIT_H_ */