usr/src/boot/sys/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  * P4: //depot/projects/trustedbsd/openbsm/sys/bsm/audit.h#10
  30  * $FreeBSD$
  31  */
  32
  33 #ifndef _BSM_AUDIT_H
  34 #define _BSM_AUDIT_H
  35
  36 #include <sys/param.h>
  37 #include <sys/types.h>
  38
  39 #define AUDIT_RECORD_MAGIC      0x828a0f1b
  40 #define MAX_AUDIT_RECORDS       20
  41 #define MAXAUDITDATA            (0x8000 - 1)
  42 #define MAX_AUDIT_RECORD_SIZE   MAXAUDITDATA
  43 #define MIN_AUDIT_FILE_SIZE     (512 * 1024)
  44
  45 /*
  46  * Minimum noumber of free blocks on the filesystem containing the audit
  47  * log necessary to avoid a hard log rotation. DO NOT SET THIS VALUE TO 0
  48  * as the kernel does an unsigned compare, plus we want to leave a few blocks
  49  * free so userspace can terminate the log, etc.
  50  */
  51 #define AUDIT_HARD_LIMIT_FREE_BLOCKS    4
  52
  53 /*
  54  * Triggers for the audit daemon.
  55  */
  56 #define AUDIT_TRIGGER_MIN               1
  57 #define AUDIT_TRIGGER_LOW_SPACE         1       /* Below low watermark. */
  58 #define AUDIT_TRIGGER_ROTATE_KERNEL     2       /* Kernel requests rotate. */
  59 #define AUDIT_TRIGGER_READ_FILE         3       /* Re-read config file. */
  60 #define AUDIT_TRIGGER_CLOSE_AND_DIE     4       /* Terminate audit. */
  61 #define AUDIT_TRIGGER_NO_SPACE          5       /* Below min free space. */
  62 #define AUDIT_TRIGGER_ROTATE_USER       6       /* User requests rotate. */
  63 #define AUDIT_TRIGGER_INITIALIZE        7       /* User initialize of auditd. */
  64 #define AUDIT_TRIGGER_EXPIRE_TRAILS     8       /* User expiration of trails. */
  65 #define AUDIT_TRIGGER_MAX               8
  66
  67 /*
  68  * The special device filename (FreeBSD).
  69  */
  70 #define AUDITDEV_FILENAME       "audit"
  71 #define AUDIT_TRIGGER_FILE      ("/dev/" AUDITDEV_FILENAME)
  72
  73 /*
  74  * Pre-defined audit IDs
  75  */
  76 #define AU_DEFAUDITID   (uid_t)(-1)
  77 #define AU_DEFAUDITSID   0
  78 #define AU_ASSIGN_ASID  -1
  79
  80 /*
  81  * IPC types.
  82  */
  83 #define AT_IPC_MSG      ((u_char)1)     /* Message IPC id. */
  84 #define AT_IPC_SEM      ((u_char)2)     /* Semaphore IPC id. */
  85 #define AT_IPC_SHM      ((u_char)3)     /* Shared mem IPC id. */
  86
  87 /*
  88  * Audit conditions.
  89  */
  90 #define AUC_UNSET               0
  91 #define AUC_AUDITING            1
  92 #define AUC_NOAUDIT             2
  93 #define AUC_DISABLED            -1
  94
  95 /*
  96  * auditon(2) commands.
  97  */
  98 #define A_OLDGETPOLICY  2
  99 #define A_OLDSETPOLICY  3
 100 #define A_GETKMASK      4
 101 #define A_SETKMASK      5
 102 #define A_OLDGETQCTRL   6
 103 #define A_OLDSETQCTRL   7
 104 #define A_GETCWD        8
 105 #define A_GETCAR        9
 106 #define A_GETSTAT       12
 107 #define A_SETSTAT       13
 108 #define A_SETUMASK      14
 109 #define A_SETSMASK      15
 110 #define A_OLDGETCOND    20
 111 #define A_OLDSETCOND    21
 112 #define A_GETCLASS      22
 113 #define A_SETCLASS      23
 114 #define A_GETPINFO      24
 115 #define A_SETPMASK      25
 116 #define A_SETFSIZE      26
 117 #define A_GETFSIZE      27
 118 #define A_GETPINFO_ADDR 28
 119 #define A_GETKAUDIT     29
 120 #define A_SETKAUDIT     30
 121 #define A_SENDTRIGGER   31
 122 #define A_GETSINFO_ADDR 32
 123 #define A_GETPOLICY     33
 124 #define A_SETPOLICY     34
 125 #define A_GETQCTRL      35
 126 #define A_SETQCTRL      36
 127 #define A_GETCOND       37
 128 #define A_SETCOND       38
 129
 130 /*
 131  * Audit policy controls.
 132  */
 133 #define AUDIT_CNT       0x0001
 134 #define AUDIT_AHLT      0x0002
 135 #define AUDIT_ARGV      0x0004
 136 #define AUDIT_ARGE      0x0008
 137 #define AUDIT_SEQ       0x0010
 138 #define AUDIT_WINDATA   0x0020
 139 #define AUDIT_USER      0x0040
 140 #define AUDIT_GROUP     0x0080
 141 #define AUDIT_TRAIL     0x0100
 142 #define AUDIT_PATH      0x0200
 143 #define AUDIT_SCNT      0x0400
 144 #define AUDIT_PUBLIC    0x0800
 145 #define AUDIT_ZONENAME  0x1000
 146 #define AUDIT_PERZONE   0x2000
 147
 148 /*
 149  * Default audit queue control parameters.
 150  */
 151 #define AQ_HIWATER      100
 152 #define AQ_MAXHIGH      10000
 153 #define AQ_LOWATER      10
 154 #define AQ_BUFSZ        MAXAUDITDATA
 155 #define AQ_MAXBUFSZ     1048576
 156
 157 /*
 158  * Default minimum percentage free space on file system.
 159  */
 160 #define AU_FS_MINFREE   20
 161
 162 /*
 163  * Type definitions used indicating the length of variable length addresses
 164  * in tokens containing addresses, such as header fields.
 165  */
 166 #define AU_IPv4         4
 167 #define AU_IPv6         16
 168
 169 __BEGIN_DECLS
 170
 171 typedef uid_t           au_id_t;
 172 typedef pid_t           au_asid_t;
 173 typedef u_int16_t       au_event_t;
 174 typedef u_int16_t       au_emod_t;
 175 typedef u_int32_t       au_class_t;
 176 typedef u_int64_t       au_asflgs_t __attribute__ ((aligned (8)));
 177
 178 struct au_tid {
 179         dev_t           port;
 180         u_int32_t       machine;
 181 };
 182 typedef struct au_tid   au_tid_t;
 183
 184 struct au_tid_addr {
 185         dev_t           at_port;
 186         u_int32_t       at_type;
 187         u_int32_t       at_addr[4];
 188 };
 189 typedef struct au_tid_addr      au_tid_addr_t;
 190
 191 struct au_mask {
 192         unsigned int    am_success;     /* Success bits. */
 193         unsigned int    am_failure;     /* Failure bits. */
 194 };
 195 typedef struct au_mask  au_mask_t;
 196
 197 struct auditinfo {
 198         au_id_t         ai_auid;        /* Audit user ID. */
 199         au_mask_t       ai_mask;        /* Audit masks. */
 200         au_tid_t        ai_termid;      /* Terminal ID. */
 201         au_asid_t       ai_asid;        /* Audit session ID. */
 202 };
 203 typedef struct auditinfo        auditinfo_t;
 204
 205 struct auditinfo_addr {
 206         au_id_t         ai_auid;        /* Audit user ID. */
 207         au_mask_t       ai_mask;        /* Audit masks. */
 208         au_tid_addr_t   ai_termid;      /* Terminal ID. */
 209         au_asid_t       ai_asid;        /* Audit session ID. */
 210         au_asflgs_t     ai_flags;       /* Audit session flags. */
 211 };
 212 typedef struct auditinfo_addr   auditinfo_addr_t;
 213
 214 struct auditpinfo {
 215         pid_t           ap_pid;         /* ID of target process. */
 216         au_id_t         ap_auid;        /* Audit user ID. */
 217         au_mask_t       ap_mask;        /* Audit masks. */
 218         au_tid_t        ap_termid;      /* Terminal ID. */
 219         au_asid_t       ap_asid;        /* Audit session ID. */
 220 };
 221 typedef struct auditpinfo       auditpinfo_t;
 222
 223 struct auditpinfo_addr {
 224         pid_t           ap_pid;         /* ID of target process. */
 225         au_id_t         ap_auid;        /* Audit user ID. */
 226         au_mask_t       ap_mask;        /* Audit masks. */
 227         au_tid_addr_t   ap_termid;      /* Terminal ID. */
 228         au_asid_t       ap_asid;        /* Audit session ID. */
 229         au_asflgs_t     ap_flags;       /* Audit session flags. */
 230 };
 231 typedef struct auditpinfo_addr  auditpinfo_addr_t;
 232
 233 struct au_session {
 234         auditinfo_addr_t        *as_aia_p;      /* Ptr to full audit info. */
 235         au_mask_t                as_mask;       /* Process Audit Masks. */
 236 };
 237 typedef struct au_session       au_session_t;
 238
 239 /*
 240  * Contents of token_t are opaque outside of libbsm.
 241  */
 242 typedef struct au_token token_t;
 243
 244 /*
 245  * Kernel audit queue control parameters:
 246  *                      Default:                Maximum:
 247  *      aq_hiwater:     AQ_HIWATER (100)        AQ_MAXHIGH (10000)
 248  *      aq_lowater:     AQ_LOWATER (10)         <aq_hiwater
 249  *      aq_bufsz:       AQ_BUFSZ (32767)        AQ_MAXBUFSZ (1048576)
 250  *      aq_delay:       20                      20000 (not used)
 251  */
 252 struct au_qctrl {
 253         int     aq_hiwater;     /* Max # of audit recs in queue when */
 254                                 /* threads with new ARs get blocked. */
 255
 256         int     aq_lowater;     /* # of audit recs in queue when */
 257                                 /* blocked threads get unblocked. */
 258
 259         int     aq_bufsz;       /* Max size of audit record for audit(2). */
 260         int     aq_delay;       /* Queue delay (not used). */
 261         int     aq_minfree;     /* Minimum filesystem percent free space. */
 262 };
 263 typedef struct au_qctrl au_qctrl_t;
 264
 265 /*
 266  * Structure for the audit statistics.
 267  */
 268 struct audit_stat {
 269         unsigned int    as_version;
 270         unsigned int    as_numevent;
 271         int             as_generated;
 272         int             as_nonattrib;
 273         int             as_kernel;
 274         int             as_audit;
 275         int             as_auditctl;
 276         int             as_enqueue;
 277         int             as_written;
 278         int             as_wblocked;
 279         int             as_rblocked;
 280         int             as_dropped;
 281         int             as_totalsize;
 282         unsigned int    as_memused;
 283 };
 284 typedef struct audit_stat       au_stat_t;
 285
 286 /*
 287  * Structure for the audit file statistics.
 288  */
 289 struct audit_fstat {
 290         u_int64_t       af_filesz;
 291         u_int64_t       af_currsz;
 292 };
 293 typedef struct audit_fstat      au_fstat_t;
 294
 295 /*
 296  * Audit to event class mapping.
 297  */
 298 struct au_evclass_map {
 299         au_event_t      ec_number;
 300         au_class_t      ec_class;
 301 };
 302 typedef struct au_evclass_map   au_evclass_map_t;
 303
 304 /*
 305  * Audit system calls.
 306  */
 307 #if !defined(_KERNEL) && !defined(KERNEL)
 308 int     audit(const void *, int);
 309 int     auditon(int, void *, int);
 310 int     auditctl(const char *);
 311 int     getauid(au_id_t *);
 312 int     setauid(const au_id_t *);
 313 int     getaudit(struct auditinfo *);
 314 int     setaudit(const struct auditinfo *);
 315 int     getaudit_addr(struct auditinfo_addr *, int);
 316 int     setaudit_addr(const struct auditinfo_addr *, int);
 317
 318 #ifdef __APPLE_API_PRIVATE
 319 #include <mach/port.h>
 320 mach_port_name_t audit_session_self(void);
 321 au_asid_t        audit_session_join(mach_port_name_t port);
 322 #endif /* __APPLE_API_PRIVATE */
 323
 324 #endif /* defined(_KERNEL) || defined(KERNEL) */
 325
 326 __END_DECLS
 327
 328 #endif /* !_BSM_AUDIT_H */