1 /*- 2 * Copyright (c) 2005-2009 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 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of Apple Inc. ("Apple") nor the names of 15 * its contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef _BSM_AUDIT_H 31 #define _BSM_AUDIT_H 32 33 #include <sys/param.h> 34 #include <sys/types.h> 35 36 #define AUDIT_RECORD_MAGIC 0x828a0f1b 37 #define MAX_AUDIT_RECORDS 20 38 #define MAXAUDITDATA (0x8000 - 1) 39 #define MAX_AUDIT_RECORD_SIZE MAXAUDITDATA 40 #define MIN_AUDIT_FILE_SIZE (512 * 1024) 41 42 /* 43 * Minimum noumber of free blocks on the filesystem containing the audit 44 * log necessary to avoid a hard log rotation. DO NOT SET THIS VALUE TO 0 45 * as the kernel does an unsigned compare, plus we want to leave a few blocks 46 * free so userspace can terminate the log, etc. 47 */ 48 #define AUDIT_HARD_LIMIT_FREE_BLOCKS 4 49 50 /* 51 * Triggers for the audit daemon. 52 */ 53 #define AUDIT_TRIGGER_MIN 1 54 #define AUDIT_TRIGGER_LOW_SPACE 1 /* Below low watermark. */ 55 #define AUDIT_TRIGGER_ROTATE_KERNEL 2 /* Kernel requests rotate. */ 56 #define AUDIT_TRIGGER_READ_FILE 3 /* Re-read config file. */ 57 #define AUDIT_TRIGGER_CLOSE_AND_DIE 4 /* Terminate audit. */ 58 #define AUDIT_TRIGGER_NO_SPACE 5 /* Below min free space. */ 59 #define AUDIT_TRIGGER_ROTATE_USER 6 /* User requests rotate. */ 60 #define AUDIT_TRIGGER_INITIALIZE 7 /* User initialize of auditd. */ 61 #define AUDIT_TRIGGER_EXPIRE_TRAILS 8 /* User expiration of trails. */ 62 #define AUDIT_TRIGGER_MAX 8 63 64 /* 65 * The special device filename (FreeBSD). 66 */ 67 #define AUDITDEV_FILENAME "audit" 68 #define AUDIT_TRIGGER_FILE ("/dev/" AUDITDEV_FILENAME) 69 70 /* 71 * Pre-defined audit IDs 72 */ 73 #define AU_DEFAUDITID (uid_t)(-1) 74 #define AU_DEFAUDITSID 0 75 #define AU_ASSIGN_ASID -1 76 77 /* 78 * IPC types. 79 */ 80 #define AT_IPC_MSG ((u_char)1) /* Message IPC id. */ 81 #define AT_IPC_SEM ((u_char)2) /* Semaphore IPC id. */ 82 #define AT_IPC_SHM ((u_char)3) /* Shared mem IPC id. */ 83 84 /* 85 * Audit conditions. 86 */ 87 #define AUC_UNSET 0 88 #define AUC_AUDITING 1 89 #define AUC_NOAUDIT 2 90 #define AUC_DISABLED -1 91 92 /* 93 * auditon(2) commands. 94 */ 95 #define A_OLDGETPOLICY 2 96 #define A_OLDSETPOLICY 3 97 #define A_GETKMASK 4 98 #define A_SETKMASK 5 99 #define A_OLDGETQCTRL 6 100 #define A_OLDSETQCTRL 7 101 #define A_GETCWD 8 102 #define A_GETCAR 9 103 #define A_GETSTAT 12 104 #define A_SETSTAT 13 105 #define A_SETUMASK 14 106 #define A_SETSMASK 15 107 #define A_OLDGETCOND 20 108 #define A_OLDSETCOND 21 109 #define A_GETCLASS 22 110 #define A_SETCLASS 23 111 #define A_GETPINFO 24 112 #define A_SETPMASK 25 113 #define A_SETFSIZE 26 114 #define A_GETFSIZE 27 115 #define A_GETPINFO_ADDR 28 116 #define A_GETKAUDIT 29 117 #define A_SETKAUDIT 30 118 #define A_SENDTRIGGER 31 119 #define A_GETSINFO_ADDR 32 120 #define A_GETPOLICY 33 121 #define A_SETPOLICY 34 122 #define A_GETQCTRL 35 123 #define A_SETQCTRL 36 124 #define A_GETCOND 37 125 #define A_SETCOND 38 126 127 /* 128 * Audit policy controls. 129 */ 130 #define AUDIT_CNT 0x0001 131 #define AUDIT_AHLT 0x0002 132 #define AUDIT_ARGV 0x0004 133 #define AUDIT_ARGE 0x0008 134 #define AUDIT_SEQ 0x0010 135 #define AUDIT_WINDATA 0x0020 136 #define AUDIT_USER 0x0040 137 #define AUDIT_GROUP 0x0080 138 #define AUDIT_TRAIL 0x0100 139 #define AUDIT_PATH 0x0200 140 #define AUDIT_SCNT 0x0400 141 #define AUDIT_PUBLIC 0x0800 142 #define AUDIT_ZONENAME 0x1000 143 #define AUDIT_PERZONE 0x2000 144 145 /* 146 * Default audit queue control parameters. 147 */ 148 #define AQ_HIWATER 100 149 #define AQ_MAXHIGH 10000 150 #define AQ_LOWATER 10 151 #define AQ_BUFSZ MAXAUDITDATA 152 #define AQ_MAXBUFSZ 1048576 153 154 /* 155 * Default minimum percentage free space on file system. 156 */ 157 #define AU_FS_MINFREE 20 158 159 /* 160 * Type definitions used indicating the length of variable length addresses 161 * in tokens containing addresses, such as header fields. 162 */ 163 #define AU_IPv4 4 164 #define AU_IPv6 16 165 166 __BEGIN_DECLS 167 168 typedef uid_t au_id_t; 169 typedef pid_t au_asid_t; 170 typedef u_int16_t au_event_t; 171 typedef u_int16_t au_emod_t; 172 typedef u_int32_t au_class_t; 173 typedef u_int64_t au_asflgs_t __attribute__ ((aligned (8))); 174 175 struct au_tid { 176 dev_t port; 177 u_int32_t machine; 178 }; 179 typedef struct au_tid au_tid_t; 180 181 struct au_tid_addr { 182 dev_t at_port; 183 u_int32_t at_type; 184 u_int32_t at_addr[4]; 185 }; 186 typedef struct au_tid_addr au_tid_addr_t; 187 188 struct au_mask { 189 unsigned int am_success; /* Success bits. */ 190 unsigned int am_failure; /* Failure bits. */ 191 }; 192 typedef struct au_mask au_mask_t; 193 194 struct auditinfo { 195 au_id_t ai_auid; /* Audit user ID. */ 196 au_mask_t ai_mask; /* Audit masks. */ 197 au_tid_t ai_termid; /* Terminal ID. */ 198 au_asid_t ai_asid; /* Audit session ID. */ 199 }; 200 typedef struct auditinfo auditinfo_t; 201 202 struct auditinfo_addr { 203 au_id_t ai_auid; /* Audit user ID. */ 204 au_mask_t ai_mask; /* Audit masks. */ 205 au_tid_addr_t ai_termid; /* Terminal ID. */ 206 au_asid_t ai_asid; /* Audit session ID. */ 207 au_asflgs_t ai_flags; /* Audit session flags. */ 208 }; 209 typedef struct auditinfo_addr auditinfo_addr_t; 210 211 struct auditpinfo { 212 pid_t ap_pid; /* ID of target process. */ 213 au_id_t ap_auid; /* Audit user ID. */ 214 au_mask_t ap_mask; /* Audit masks. */ 215 au_tid_t ap_termid; /* Terminal ID. */ 216 au_asid_t ap_asid; /* Audit session ID. */ 217 }; 218 typedef struct auditpinfo auditpinfo_t; 219 220 struct auditpinfo_addr { 221 pid_t ap_pid; /* ID of target process. */ 222 au_id_t ap_auid; /* Audit user ID. */ 223 au_mask_t ap_mask; /* Audit masks. */ 224 au_tid_addr_t ap_termid; /* Terminal ID. */ 225 au_asid_t ap_asid; /* Audit session ID. */ 226 au_asflgs_t ap_flags; /* Audit session flags. */ 227 }; 228 typedef struct auditpinfo_addr auditpinfo_addr_t; 229 230 struct au_session { 231 auditinfo_addr_t *as_aia_p; /* Ptr to full audit info. */ 232 au_mask_t as_mask; /* Process Audit Masks. */ 233 }; 234 typedef struct au_session au_session_t; 235 236 /* 237 * Contents of token_t are opaque outside of libbsm. 238 */ 239 typedef struct au_token token_t; 240 241 /* 242 * Kernel audit queue control parameters: 243 * Default: Maximum: 244 * aq_hiwater: AQ_HIWATER (100) AQ_MAXHIGH (10000) 245 * aq_lowater: AQ_LOWATER (10) <aq_hiwater 246 * aq_bufsz: AQ_BUFSZ (32767) AQ_MAXBUFSZ (1048576) 247 * aq_delay: 20 20000 (not used) 248 */ 249 struct au_qctrl { 250 int aq_hiwater; /* Max # of audit recs in queue when */ 251 /* threads with new ARs get blocked. */ 252 253 int aq_lowater; /* # of audit recs in queue when */ 254 /* blocked threads get unblocked. */ 255 256 int aq_bufsz; /* Max size of audit record for audit(2). */ 257 int aq_delay; /* Queue delay (not used). */ 258 int aq_minfree; /* Minimum filesystem percent free space. */ 259 }; 260 typedef struct au_qctrl au_qctrl_t; 261 262 /* 263 * Structure for the audit statistics. 264 */ 265 struct audit_stat { 266 unsigned int as_version; 267 unsigned int as_numevent; 268 int as_generated; 269 int as_nonattrib; 270 int as_kernel; 271 int as_audit; 272 int as_auditctl; 273 int as_enqueue; 274 int as_written; 275 int as_wblocked; 276 int as_rblocked; 277 int as_dropped; 278 int as_totalsize; 279 unsigned int as_memused; 280 }; 281 typedef struct audit_stat au_stat_t; 282 283 /* 284 * Structure for the audit file statistics. 285 */ 286 struct audit_fstat { 287 u_int64_t af_filesz; 288 u_int64_t af_currsz; 289 }; 290 typedef struct audit_fstat au_fstat_t; 291 292 /* 293 * Audit to event class mapping. 294 */ 295 struct au_evclass_map { 296 au_event_t ec_number; 297 au_class_t ec_class; 298 }; 299 typedef struct au_evclass_map au_evclass_map_t; 300 301 /* 302 * Audit system calls. 303 */ 304 #if !defined(_KERNEL) && !defined(KERNEL) 305 int audit(const void *, int); 306 int auditon(int, void *, int); 307 int auditctl(const char *); 308 int getauid(au_id_t *); 309 int setauid(const au_id_t *); 310 int getaudit(struct auditinfo *); 311 int setaudit(const struct auditinfo *); 312 int getaudit_addr(struct auditinfo_addr *, int); 313 int setaudit_addr(const struct auditinfo_addr *, int); 314 315 #ifdef __APPLE_API_PRIVATE 316 #include <mach/port.h> 317 mach_port_name_t audit_session_self(void); 318 au_asid_t audit_session_join(mach_port_name_t port); 319 #endif /* __APPLE_API_PRIVATE */ 320 321 #endif /* defined(_KERNEL) || defined(KERNEL) */ 322 323 __END_DECLS 324 325 #endif /* !_BSM_AUDIT_H */ 326