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