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85c8721f | 1 | /* audit.h -- Auditing support |
1da177e4 LT |
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 <faith@redhat.com> | |
21 | * | |
22 | */ | |
23 | ||
24 | #ifndef _LINUX_AUDIT_H_ | |
25 | #define _LINUX_AUDIT_H_ | |
26 | ||
2fd6f58b DW |
27 | #include <linux/sched.h> |
28 | #include <linux/elf.h> | |
29 | ||
c0404993 SG |
30 | /* The netlink messages for the audit system is divided into blocks: |
31 | * 1000 - 1099 are for commanding the audit system | |
32 | * 1100 - 1199 user space trusted application messages | |
33 | * 1200 - 1299 messages internal to the audit daemon | |
34 | * 1300 - 1399 audit event messages | |
35 | * 1400 - 1499 SE Linux use | |
36 | * 1500 - 1999 future use | |
37 | * 2000 is for otherwise unclassified kernel audit messages | |
38 | * | |
39 | * Messages from 1000-1199 are bi-directional. 1200-1299 are exclusively user | |
40 | * space. Anything over that is kernel --> user space communication. | |
41 | */ | |
c2f0c7c3 SG |
42 | #define AUDIT_GET 1000 /* Get status */ |
43 | #define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */ | |
c0404993 SG |
44 | #define AUDIT_LIST 1002 /* List syscall filtering rules */ |
45 | #define AUDIT_ADD 1003 /* Add syscall filtering rule */ | |
46 | #define AUDIT_DEL 1004 /* Delete syscall filtering rule */ | |
47 | #define AUDIT_USER 1005 /* Message from userspace -- deprecated */ | |
c2f0c7c3 | 48 | #define AUDIT_LOGIN 1006 /* Define the login id and information */ |
c0404993 SG |
49 | #define AUDIT_WATCH_INS 1007 /* Insert file/dir watch entry */ |
50 | #define AUDIT_WATCH_REM 1008 /* Remove file/dir watch entry */ | |
51 | #define AUDIT_WATCH_LIST 1009 /* List all file/dir watches */ | |
52 | #define AUDIT_SIGNAL_INFO 1010 /* Get info about sender of signal to auditd */ | |
53 | ||
209aba03 DW |
54 | #define AUDIT_FIRST_USER_MSG 1100 /* Userspace messages uninteresting to kernel */ |
55 | #define AUDIT_LAST_USER_MSG 1199 | |
c0404993 SG |
56 | |
57 | #define AUDIT_DAEMON_START 1200 /* Daemon startup record */ | |
58 | #define AUDIT_DAEMON_END 1201 /* Daemon normal stop record */ | |
59 | #define AUDIT_DAEMON_ABORT 1202 /* Daemon error stop record */ | |
60 | #define AUDIT_DAEMON_CONFIG 1203 /* Daemon config change */ | |
61 | ||
62 | #define AUDIT_SYSCALL 1300 /* Syscall event */ | |
63 | #define AUDIT_FS_WATCH 1301 /* Filesystem watch event */ | |
8f37d47c | 64 | #define AUDIT_PATH 1302 /* Filename path information */ |
c0404993 | 65 | #define AUDIT_IPC 1303 /* IPC record */ |
3ec3b2fb | 66 | #define AUDIT_SOCKETCALL 1304 /* sys_socketcall arguments */ |
c0404993 | 67 | #define AUDIT_CONFIG_CHANGE 1305 /* Audit system configuration change */ |
3ec3b2fb | 68 | #define AUDIT_SOCKADDR 1306 /* sockaddr copied as syscall arg */ |
8f37d47c | 69 | #define AUDIT_CWD 1307 /* Current working directory */ |
c0404993 SG |
70 | |
71 | #define AUDIT_AVC 1400 /* SE Linux avc denial or grant */ | |
72 | #define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */ | |
01116105 | 73 | #define AUDIT_AVC_PATH 1402 /* dentry, vfsmount pair from avc */ |
c2f0c7c3 SG |
74 | |
75 | #define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */ | |
1da177e4 LT |
76 | |
77 | /* Rule flags */ | |
0f45aa18 DW |
78 | #define AUDIT_FILTER_USER 0x00 /* Apply rule to user-generated messages */ |
79 | #define AUDIT_FILTER_TASK 0x01 /* Apply rule at task creation (not syscall) */ | |
80 | #define AUDIT_FILTER_ENTRY 0x02 /* Apply rule at syscall entry */ | |
81 | #define AUDIT_FILTER_WATCH 0x03 /* Apply rule to file system watches */ | |
82 | #define AUDIT_FILTER_EXIT 0x04 /* Apply rule at syscall exit */ | |
83 | ||
84 | #define AUDIT_NR_FILTERS 5 | |
85 | ||
86 | #define AUDIT_FILTER_PREPEND 0x10 /* Prepend to front of list */ | |
1da177e4 LT |
87 | |
88 | /* Rule actions */ | |
89 | #define AUDIT_NEVER 0 /* Do not build context if rule matches */ | |
90 | #define AUDIT_POSSIBLE 1 /* Build context if rule matches */ | |
91 | #define AUDIT_ALWAYS 2 /* Generate audit record if rule matches */ | |
92 | ||
93 | /* Rule structure sizes -- if these change, different AUDIT_ADD and | |
94 | * AUDIT_LIST commands must be implemented. */ | |
95 | #define AUDIT_MAX_FIELDS 64 | |
96 | #define AUDIT_BITMASK_SIZE 64 | |
97 | #define AUDIT_WORD(nr) ((__u32)((nr)/32)) | |
98 | #define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32)) | |
99 | ||
100 | /* Rule fields */ | |
101 | /* These are useful when checking the | |
102 | * task structure at task creation time | |
103 | * (AUDIT_PER_TASK). */ | |
104 | #define AUDIT_PID 0 | |
105 | #define AUDIT_UID 1 | |
106 | #define AUDIT_EUID 2 | |
107 | #define AUDIT_SUID 3 | |
108 | #define AUDIT_FSUID 4 | |
109 | #define AUDIT_GID 5 | |
110 | #define AUDIT_EGID 6 | |
111 | #define AUDIT_SGID 7 | |
112 | #define AUDIT_FSGID 8 | |
113 | #define AUDIT_LOGINUID 9 | |
114 | #define AUDIT_PERS 10 | |
2fd6f58b | 115 | #define AUDIT_ARCH 11 |
1da177e4 LT |
116 | |
117 | /* These are ONLY useful when checking | |
118 | * at syscall exit time (AUDIT_AT_EXIT). */ | |
119 | #define AUDIT_DEVMAJOR 100 | |
120 | #define AUDIT_DEVMINOR 101 | |
121 | #define AUDIT_INODE 102 | |
122 | #define AUDIT_EXIT 103 | |
123 | #define AUDIT_SUCCESS 104 /* exit >= 0; value ignored */ | |
124 | ||
125 | #define AUDIT_ARG0 200 | |
126 | #define AUDIT_ARG1 (AUDIT_ARG0+1) | |
127 | #define AUDIT_ARG2 (AUDIT_ARG0+2) | |
128 | #define AUDIT_ARG3 (AUDIT_ARG0+3) | |
129 | ||
130 | #define AUDIT_NEGATE 0x80000000 | |
131 | ||
132 | ||
133 | /* Status symbols */ | |
134 | /* Mask values */ | |
135 | #define AUDIT_STATUS_ENABLED 0x0001 | |
136 | #define AUDIT_STATUS_FAILURE 0x0002 | |
137 | #define AUDIT_STATUS_PID 0x0004 | |
138 | #define AUDIT_STATUS_RATE_LIMIT 0x0008 | |
139 | #define AUDIT_STATUS_BACKLOG_LIMIT 0x0010 | |
140 | /* Failure-to-log actions */ | |
141 | #define AUDIT_FAIL_SILENT 0 | |
142 | #define AUDIT_FAIL_PRINTK 1 | |
143 | #define AUDIT_FAIL_PANIC 2 | |
144 | ||
2fd6f58b DW |
145 | /* distinguish syscall tables */ |
146 | #define __AUDIT_ARCH_64BIT 0x80000000 | |
147 | #define __AUDIT_ARCH_LE 0x40000000 | |
148 | #define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) | |
149 | #define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE) | |
150 | #define AUDIT_ARCH_ARMEB (EM_ARM) | |
151 | #define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE) | |
152 | #define AUDIT_ARCH_FRV (EM_FRV) | |
153 | #define AUDIT_ARCH_H8300 (EM_H8_300) | |
154 | #define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE) | |
155 | #define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) | |
156 | #define AUDIT_ARCH_M32R (EM_M32R) | |
157 | #define AUDIT_ARCH_M68K (EM_68K) | |
158 | #define AUDIT_ARCH_MIPS (EM_MIPS) | |
159 | #define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE) | |
160 | #define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT) | |
161 | #define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) | |
162 | #define AUDIT_ARCH_PARISC (EM_PARISC) | |
163 | #define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT) | |
164 | #define AUDIT_ARCH_PPC (EM_PPC) | |
165 | #define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT) | |
166 | #define AUDIT_ARCH_S390 (EM_S390) | |
167 | #define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT) | |
168 | #define AUDIT_ARCH_SH (EM_SH) | |
169 | #define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE) | |
170 | #define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT) | |
171 | #define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) | |
172 | #define AUDIT_ARCH_SPARC (EM_SPARC) | |
173 | #define AUDIT_ARCH_SPARC64 (EM_SPARC64|__AUDIT_ARCH_64BIT) | |
174 | #define AUDIT_ARCH_V850 (EM_V850|__AUDIT_ARCH_LE) | |
175 | #define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) | |
176 | ||
1da177e4 LT |
177 | struct audit_status { |
178 | __u32 mask; /* Bit mask for valid entries */ | |
23f32d18 | 179 | __u32 enabled; /* 1 = enabled, 0 = disabled */ |
1da177e4 LT |
180 | __u32 failure; /* Failure-to-log action */ |
181 | __u32 pid; /* pid of auditd process */ | |
182 | __u32 rate_limit; /* messages rate limit (per second) */ | |
183 | __u32 backlog_limit; /* waiting messages limit */ | |
184 | __u32 lost; /* messages lost */ | |
185 | __u32 backlog; /* messages waiting in queue */ | |
186 | }; | |
187 | ||
188 | struct audit_rule { /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */ | |
189 | __u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */ | |
190 | __u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */ | |
191 | __u32 field_count; | |
192 | __u32 mask[AUDIT_BITMASK_SIZE]; | |
193 | __u32 fields[AUDIT_MAX_FIELDS]; | |
194 | __u32 values[AUDIT_MAX_FIELDS]; | |
195 | }; | |
196 | ||
197 | #ifdef __KERNEL__ | |
198 | ||
c2f0c7c3 SG |
199 | struct audit_sig_info { |
200 | uid_t uid; | |
201 | pid_t pid; | |
202 | }; | |
203 | ||
1da177e4 LT |
204 | struct audit_buffer; |
205 | struct audit_context; | |
206 | struct inode; | |
207 | ||
2fd6f58b DW |
208 | #define AUDITSC_INVALID 0 |
209 | #define AUDITSC_SUCCESS 1 | |
210 | #define AUDITSC_FAILURE 2 | |
211 | #define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS ) | |
1da177e4 LT |
212 | #ifdef CONFIG_AUDITSYSCALL |
213 | /* These are defined in auditsc.c */ | |
214 | /* Public API */ | |
215 | extern int audit_alloc(struct task_struct *task); | |
216 | extern void audit_free(struct task_struct *task); | |
2fd6f58b | 217 | extern void audit_syscall_entry(struct task_struct *task, int arch, |
1da177e4 LT |
218 | int major, unsigned long a0, unsigned long a1, |
219 | unsigned long a2, unsigned long a3); | |
2fd6f58b | 220 | extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code); |
1da177e4 LT |
221 | extern void audit_getname(const char *name); |
222 | extern void audit_putname(const char *name); | |
ae7b961b | 223 | extern void audit_inode(const char *name, const struct inode *inode, unsigned flags); |
1da177e4 LT |
224 | |
225 | /* Private API (for audit.c only) */ | |
226 | extern int audit_receive_filter(int type, int pid, int uid, int seq, | |
c94c257c | 227 | void *data, uid_t loginuid); |
bfb4496e DW |
228 | extern unsigned int audit_serial(void); |
229 | extern void auditsc_get_stamp(struct audit_context *ctx, | |
230 | struct timespec *t, unsigned int *serial); | |
456be6cd | 231 | extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid); |
1da177e4 LT |
232 | extern uid_t audit_get_loginuid(struct audit_context *ctx); |
233 | extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode); | |
3ec3b2fb DW |
234 | extern int audit_socketcall(int nargs, unsigned long *args); |
235 | extern int audit_sockaddr(int len, void *addr); | |
01116105 | 236 | extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt); |
c2f0c7c3 | 237 | extern void audit_signal_info(int sig, struct task_struct *t); |
0f45aa18 | 238 | extern int audit_filter_user(struct task_struct *tsk, int type); |
1da177e4 LT |
239 | #else |
240 | #define audit_alloc(t) ({ 0; }) | |
241 | #define audit_free(t) do { ; } while (0) | |
2fd6f58b DW |
242 | #define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0) |
243 | #define audit_syscall_exit(t,f,r) do { ; } while (0) | |
1da177e4 LT |
244 | #define audit_getname(n) do { ; } while (0) |
245 | #define audit_putname(n) do { ; } while (0) | |
ae7b961b | 246 | #define audit_inode(n,i,f) do { ; } while (0) |
197c69c6 | 247 | #define audit_receive_filter(t,p,u,s,d,l) ({ -EOPNOTSUPP; }) |
bfb4496e | 248 | #define auditsc_get_stamp(c,t,s) do { BUG(); } while (0) |
1da177e4 LT |
249 | #define audit_get_loginuid(c) ({ -1; }) |
250 | #define audit_ipc_perms(q,u,g,m) ({ 0; }) | |
3ec3b2fb DW |
251 | #define audit_socketcall(n,a) ({ 0; }) |
252 | #define audit_sockaddr(len, addr) ({ 0; }) | |
01116105 | 253 | #define audit_avc_path(dentry, mnt) ({ 0; }) |
c2f0c7c3 | 254 | #define audit_signal_info(s,t) do { ; } while (0) |
0f45aa18 | 255 | #define audit_filter_user(struct ({ 1; }) |
1da177e4 LT |
256 | #endif |
257 | ||
258 | #ifdef CONFIG_AUDIT | |
259 | /* These are defined in audit.c */ | |
260 | /* Public API */ | |
c0404993 SG |
261 | extern void audit_log(struct audit_context *ctx, int type, |
262 | const char *fmt, ...) | |
263 | __attribute__((format(printf,3,4))); | |
1da177e4 | 264 | |
c0404993 | 265 | extern struct audit_buffer *audit_log_start(struct audit_context *ctx,int type); |
1da177e4 LT |
266 | extern void audit_log_format(struct audit_buffer *ab, |
267 | const char *fmt, ...) | |
268 | __attribute__((format(printf,2,3))); | |
269 | extern void audit_log_end(struct audit_buffer *ab); | |
83c7d091 DW |
270 | extern void audit_log_hex(struct audit_buffer *ab, |
271 | const unsigned char *buf, | |
272 | size_t len); | |
273 | extern void audit_log_untrustedstring(struct audit_buffer *ab, | |
274 | const char *string); | |
1da177e4 LT |
275 | extern void audit_log_d_path(struct audit_buffer *ab, |
276 | const char *prefix, | |
277 | struct dentry *dentry, | |
278 | struct vfsmount *vfsmnt); | |
1da177e4 LT |
279 | /* Private API (for auditsc.c only) */ |
280 | extern void audit_send_reply(int pid, int seq, int type, | |
281 | int done, int multi, | |
282 | void *payload, int size); | |
283 | extern void audit_log_lost(const char *message); | |
284 | #else | |
c0404993 SG |
285 | #define audit_log(c,t,f,...) do { ; } while (0) |
286 | #define audit_log_start(c,t) ({ NULL; }) | |
1da177e4 LT |
287 | #define audit_log_vformat(b,f,a) do { ; } while (0) |
288 | #define audit_log_format(b,f,...) do { ; } while (0) | |
289 | #define audit_log_end(b) do { ; } while (0) | |
83c7d091 DW |
290 | #define audit_log_hex(a,b,l) do { ; } while (0) |
291 | #define audit_log_untrustedstring(a,s) do { ; } while (0) | |
1da177e4 LT |
292 | #define audit_log_d_path(b,p,d,v) do { ; } while (0) |
293 | #endif | |
294 | #endif | |
295 | #endif |