sys/bsm/audit.h

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