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/* audit.h -- Auditing support

 *

 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.

 * All Rights Reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Written by Rickard E. (Rik) Faith <faith@redhat.com>

 *

 */

#ifndef _LINUX_AUDIT_H_

#define _LINUX_AUDIT_H_

#include <linux/types.h>

#include <linux/elf-em.h>

/* The netlink messages for the audit system is divided into blocks:

 * 1000 - 1099 are for commanding the audit system

 * 1100 - 1199 user space trusted application messages

 * 1200 - 1299 messages internal to the audit daemon

 * 1300 - 1399 audit event messages

 * 1400 - 1499 SE Linux use

 * 1500 - 1599 kernel LSPP events

 * 1600 - 1699 kernel crypto events

 * 1700 - 1799 kernel anomaly records

 * 1800 - 1899 kernel integrity events

 * 1900 - 1999 future kernel use

 * 2000 is for otherwise unclassified kernel audit messages (legacy)

 * 2001 - 2099 unused (kernel)

 * 2100 - 2199 user space anomaly records

 * 2200 - 2299 user space actions taken in response to anomalies

 * 2300 - 2399 user space generated LSPP events

 * 2400 - 2499 user space crypto events

 * 2500 - 2999 future user space (maybe integrity labels and related events)

 *

 * Messages from 1000-1199 are bi-directional. 1200-1299 & 2100 - 2999 are

 * exclusively user space. 1300-2099 is kernel --> user space

 * communication.

 */

#define AUDIT_GET               1000    /* Get status */

#define AUDIT_SET               1001    /* Set status (enable/disable/auditd) */

#define AUDIT_LIST              1002    /* List syscall rules -- deprecated */

#define AUDIT_ADD               1003    /* Add syscall rule -- deprecated */

#define AUDIT_DEL               1004    /* Delete syscall rule -- deprecated */

#define AUDIT_USER              1005    /* Message from userspace -- deprecated */

#define AUDIT_LOGIN             1006    /* Define the login id and information */

#define AUDIT_WATCH_INS         1007    /* Insert file/dir watch entry */

#define AUDIT_WATCH_REM         1008    /* Remove file/dir watch entry */

#define AUDIT_WATCH_LIST        1009    /* List all file/dir watches */

#define AUDIT_SIGNAL_INFO       1010    /* Get info about sender of signal to auditd */

#define AUDIT_ADD_RULE          1011    /* Add syscall filtering rule */

#define AUDIT_DEL_RULE          1012    /* Delete syscall filtering rule */

#define AUDIT_LIST_RULES        1013    /* List syscall filtering rules */

#define AUDIT_TRIM              1014    /* Trim junk from watched tree */

#define AUDIT_MAKE_EQUIV        1015    /* Append to watched tree */

#define AUDIT_TTY_GET           1016    /* Get TTY auditing status */

#define AUDIT_TTY_SET           1017    /* Set TTY auditing status */

#define AUDIT_SET_FEATURE       1018    /* Turn an audit feature on or off */

#define AUDIT_GET_FEATURE       1019    /* Get which features are enabled */

#define AUDIT_FEATURE_CHANGE    1020    /* audit log listing feature changes */

#define AUDIT_FIRST_USER_MSG    1100    /* Userspace messages mostly uninteresting to kernel */

#define AUDIT_USER_AVC          1107    /* We filter this differently */

#define AUDIT_USER_TTY          1124    /* Non-ICANON TTY input meaning */

#define AUDIT_LAST_USER_MSG     1199

#define AUDIT_FIRST_USER_MSG2   2100    /* More user space messages */

#define AUDIT_LAST_USER_MSG2    2999

#define AUDIT_DAEMON_START      1200    /* Daemon startup record */

#define AUDIT_DAEMON_END        1201    /* Daemon normal stop record */

#define AUDIT_DAEMON_ABORT      1202    /* Daemon error stop record */

#define AUDIT_DAEMON_CONFIG     1203    /* Daemon config change */

#define AUDIT_SYSCALL           1300    /* Syscall event */

/* #define AUDIT_FS_WATCH       1301     * Deprecated */

#define AUDIT_PATH              1302    /* Filename path information */

#define AUDIT_IPC               1303    /* IPC record */

#define AUDIT_SOCKETCALL        1304    /* sys_socketcall arguments */

#define AUDIT_CONFIG_CHANGE     1305    /* Audit system configuration change */

#define AUDIT_SOCKADDR          1306    /* sockaddr copied as syscall arg */

#define AUDIT_CWD               1307    /* Current working directory */

#define AUDIT_EXECVE            1309    /* execve arguments */

#define AUDIT_IPC_SET_PERM      1311    /* IPC new permissions record type */

#define AUDIT_MQ_OPEN           1312    /* POSIX MQ open record type */

#define AUDIT_MQ_SENDRECV       1313    /* POSIX MQ send/receive record type */

#define AUDIT_MQ_NOTIFY         1314    /* POSIX MQ notify record type */

#define AUDIT_MQ_GETSETATTR     1315    /* POSIX MQ get/set attribute record type */

#define AUDIT_KERNEL_OTHER      1316    /* For use by 3rd party modules */

#define AUDIT_FD_PAIR           1317    /* audit record for pipe/socketpair */

#define AUDIT_OBJ_PID           1318    /* ptrace target */

#define AUDIT_TTY               1319    /* Input on an administrative TTY */

#define AUDIT_EOE               1320    /* End of multi-record event */

#define AUDIT_BPRM_FCAPS        1321    /* Information about fcaps increasing perms */

#define AUDIT_CAPSET            1322    /* Record showing argument to sys_capset */

#define AUDIT_MMAP              1323    /* Record showing descriptor and flags in mmap */

#define AUDIT_NETFILTER_PKT     1324    /* Packets traversing netfilter chains */

#define AUDIT_NETFILTER_CFG     1325    /* Netfilter chain modifications */

#define AUDIT_SECCOMP           1326    /* Secure Computing event */

#define AUDIT_AVC               1400    /* SE Linux avc denial or grant */

#define AUDIT_SELINUX_ERR       1401    /* Internal SE Linux Errors */

#define AUDIT_AVC_PATH          1402    /* dentry, vfsmount pair from avc */

#define AUDIT_MAC_POLICY_LOAD   1403    /* Policy file load */

#define AUDIT_MAC_STATUS        1404    /* Changed enforcing,permissive,off */

#define AUDIT_MAC_CONFIG_CHANGE 1405    /* Changes to booleans */

#define AUDIT_MAC_UNLBL_ALLOW   1406    /* NetLabel: allow unlabeled traffic */

#define AUDIT_MAC_CIPSOV4_ADD   1407    /* NetLabel: add CIPSOv4 DOI entry */

#define AUDIT_MAC_CIPSOV4_DEL   1408    /* NetLabel: del CIPSOv4 DOI entry */

#define AUDIT_MAC_MAP_ADD       1409    /* NetLabel: add LSM domain mapping */

#define AUDIT_MAC_MAP_DEL       1410    /* NetLabel: del LSM domain mapping */

#define AUDIT_MAC_IPSEC_ADDSA   1411    /* Not used */

#define AUDIT_MAC_IPSEC_DELSA   1412    /* Not used  */

#define AUDIT_MAC_IPSEC_ADDSPD  1413    /* Not used */

#define AUDIT_MAC_IPSEC_DELSPD  1414    /* Not used */

#define AUDIT_MAC_IPSEC_EVENT   1415    /* Audit an IPSec event */

#define AUDIT_MAC_UNLBL_STCADD  1416    /* NetLabel: add a static label */

#define AUDIT_MAC_UNLBL_STCDEL  1417    /* NetLabel: del a static label */

#define AUDIT_FIRST_KERN_ANOM_MSG   1700

#define AUDIT_LAST_KERN_ANOM_MSG    1799

#define AUDIT_ANOM_PROMISCUOUS      1700 /* Device changed promiscuous mode */

#define AUDIT_ANOM_ABEND            1701 /* Process ended abnormally */

#define AUDIT_ANOM_LINK             1702 /* Suspicious use of file links */

#define AUDIT_INTEGRITY_DATA        1800 /* Data integrity verification */

#define AUDIT_INTEGRITY_METADATA    1801 /* Metadata integrity verification */

#define AUDIT_INTEGRITY_STATUS      1802 /* Integrity enable status */

#define AUDIT_INTEGRITY_HASH        1803 /* Integrity HASH type */

#define AUDIT_INTEGRITY_PCR         1804 /* PCR invalidation msgs */

#define AUDIT_INTEGRITY_RULE        1805 /* policy rule */

#define AUDIT_KERNEL            2000    /* Asynchronous audit record. NOT A REQUEST. */

/* Rule flags */

#define AUDIT_FILTER_USER       0x00    /* Apply rule to user-generated messages */

#define AUDIT_FILTER_TASK       0x01    /* Apply rule at task creation (not syscall) */

#define AUDIT_FILTER_ENTRY      0x02    /* Apply rule at syscall entry */

#define AUDIT_FILTER_WATCH      0x03    /* Apply rule to file system watches */

#define AUDIT_FILTER_EXIT       0x04    /* Apply rule at syscall exit */

#define AUDIT_FILTER_TYPE       0x05    /* Apply rule at audit_log_start */

#define AUDIT_NR_FILTERS        6

#define AUDIT_FILTER_PREPEND    0x10    /* Prepend to front of list */

/* Rule actions */

#define AUDIT_NEVER    0        /* Do not build context if rule matches */

#define AUDIT_POSSIBLE 1        /* Build context if rule matches  */

#define AUDIT_ALWAYS   2        /* Generate audit record if rule matches */

/* Rule structure sizes -- if these change, different AUDIT_ADD and

 * AUDIT_LIST commands must be implemented. */

#define AUDIT_MAX_FIELDS   64

#define AUDIT_MAX_KEY_LEN  256

#define AUDIT_BITMASK_SIZE 64

#define AUDIT_WORD(nr) ((__u32)((nr)/32))

#define AUDIT_BIT(nr)  (1 << ((nr) - AUDIT_WORD(nr)*32))

#define AUDIT_SYSCALL_CLASSES 16

#define AUDIT_CLASS_DIR_WRITE 0

#define AUDIT_CLASS_DIR_WRITE_32 1

#define AUDIT_CLASS_CHATTR 2

#define AUDIT_CLASS_CHATTR_32 3

#define AUDIT_CLASS_READ 4

#define AUDIT_CLASS_READ_32 5

#define AUDIT_CLASS_WRITE 6

#define AUDIT_CLASS_WRITE_32 7

#define AUDIT_CLASS_SIGNAL 8

#define AUDIT_CLASS_SIGNAL_32 9

/* This bitmask is used to validate user input.  It represents all bits that

 * are currently used in an audit field constant understood by the kernel.

 * If you are adding a new #define AUDIT_<whatever>, please ensure that

 * AUDIT_UNUSED_BITS is updated if need be. */

#define AUDIT_UNUSED_BITS       0x07FFFC00

/* AUDIT_FIELD_COMPARE rule list */

#define AUDIT_COMPARE_UID_TO_OBJ_UID    1

#define AUDIT_COMPARE_GID_TO_OBJ_GID    2

#define AUDIT_COMPARE_EUID_TO_OBJ_UID   3

#define AUDIT_COMPARE_EGID_TO_OBJ_GID   4

#define AUDIT_COMPARE_AUID_TO_OBJ_UID   5

#define AUDIT_COMPARE_SUID_TO_OBJ_UID   6

#define AUDIT_COMPARE_SGID_TO_OBJ_GID   7

#define AUDIT_COMPARE_FSUID_TO_OBJ_UID  8

#define AUDIT_COMPARE_FSGID_TO_OBJ_GID  9

#define AUDIT_COMPARE_UID_TO_AUID       10

#define AUDIT_COMPARE_UID_TO_EUID       11

#define AUDIT_COMPARE_UID_TO_FSUID      12

#define AUDIT_COMPARE_UID_TO_SUID       13

#define AUDIT_COMPARE_AUID_TO_FSUID     14

#define AUDIT_COMPARE_AUID_TO_SUID      15

#define AUDIT_COMPARE_AUID_TO_EUID      16

#define AUDIT_COMPARE_EUID_TO_SUID      17

#define AUDIT_COMPARE_EUID_TO_FSUID     18

#define AUDIT_COMPARE_SUID_TO_FSUID     19

#define AUDIT_COMPARE_GID_TO_EGID       20

#define AUDIT_COMPARE_GID_TO_FSGID      21

#define AUDIT_COMPARE_GID_TO_SGID       22

#define AUDIT_COMPARE_EGID_TO_FSGID     23

#define AUDIT_COMPARE_EGID_TO_SGID      24

#define AUDIT_COMPARE_SGID_TO_FSGID     25

#define AUDIT_MAX_FIELD_COMPARE         AUDIT_COMPARE_SGID_TO_FSGID

/* Rule fields */

                                /* These are useful when checking the

                                 * task structure at task creation time

                                 * (AUDIT_PER_TASK).  */

#define AUDIT_PID       0

#define AUDIT_UID       1

#define AUDIT_EUID      2

#define AUDIT_SUID      3

#define AUDIT_FSUID     4

#define AUDIT_GID       5

#define AUDIT_EGID      6

#define AUDIT_SGID      7

#define AUDIT_FSGID     8

#define AUDIT_LOGINUID  9

#define AUDIT_PERS      10

#define AUDIT_ARCH      11

#define AUDIT_MSGTYPE   12

#define AUDIT_SUBJ_USER 13      /* security label user */

#define AUDIT_SUBJ_ROLE 14      /* security label role */

#define AUDIT_SUBJ_TYPE 15      /* security label type */

#define AUDIT_SUBJ_SEN  16      /* security label sensitivity label */

#define AUDIT_SUBJ_CLR  17      /* security label clearance label */

#define AUDIT_PPID      18

#define AUDIT_OBJ_USER  19

#define AUDIT_OBJ_ROLE  20

#define AUDIT_OBJ_TYPE  21

#define AUDIT_OBJ_LEV_LOW       22

#define AUDIT_OBJ_LEV_HIGH      23

#define AUDIT_LOGINUID_SET      24

                                /* These are ONLY useful when checking

                                 * at syscall exit time (AUDIT_AT_EXIT). */

#define AUDIT_DEVMAJOR  100

#define AUDIT_DEVMINOR  101

#define AUDIT_INODE     102

#define AUDIT_EXIT      103

#define AUDIT_SUCCESS   104     /* exit >= 0; value ignored */

#define AUDIT_WATCH     105

#define AUDIT_PERM      106

#define AUDIT_DIR       107

#define AUDIT_FILETYPE  108

#define AUDIT_OBJ_UID   109

#define AUDIT_OBJ_GID   110

#define AUDIT_FIELD_COMPARE     111

#define AUDIT_ARG0      200

#define AUDIT_ARG1      (AUDIT_ARG0+1)

#define AUDIT_ARG2      (AUDIT_ARG0+2)

#define AUDIT_ARG3      (AUDIT_ARG0+3)

#define AUDIT_FILTERKEY 210

#define AUDIT_NEGATE                    0x80000000

/* These are the supported operators.

 *      4  2  1  8

 *      =  >  <  ?

 *      ----------

 *      0  0  0  0      00      nonsense

 *      0  0  0  1      08      &  bit mask

 *      0  0  1  0      10      <

 *      0  1  0  0      20      >

 *      0  1  1  0      30      !=

 *      1  0  0  0      40      =

 *      1  0  0  1      48      &=  bit test

 *      1  0  1  0      50      <=

 *      1  1  0  0      60      >=

 *      1  1  1  1      78      all operators

 */

#define AUDIT_BIT_MASK                  0x08000000

#define AUDIT_LESS_THAN                 0x10000000

#define AUDIT_GREATER_THAN              0x20000000

#define AUDIT_NOT_EQUAL                 0x30000000

#define AUDIT_EQUAL                     0x40000000

#define AUDIT_BIT_TEST                  (AUDIT_BIT_MASK|AUDIT_EQUAL)

#define AUDIT_LESS_THAN_OR_EQUAL        (AUDIT_LESS_THAN|AUDIT_EQUAL)

#define AUDIT_GREATER_THAN_OR_EQUAL     (AUDIT_GREATER_THAN|AUDIT_EQUAL)

#define AUDIT_OPERATORS                 (AUDIT_EQUAL|AUDIT_NOT_EQUAL|AUDIT_BIT_MASK)

enum {

        Audit_equal,

        Audit_not_equal,

        Audit_bitmask,

        Audit_bittest,

        Audit_lt,

        Audit_gt,

        Audit_le,

        Audit_ge,

        Audit_bad

};

/* Status symbols */

                                /* Mask values */

#define AUDIT_STATUS_ENABLED            0x0001

#define AUDIT_STATUS_FAILURE            0x0002

#define AUDIT_STATUS_PID                0x0004

#define AUDIT_STATUS_RATE_LIMIT         0x0008

#define AUDIT_STATUS_BACKLOG_LIMIT      0x0010

#define AUDIT_STATUS_BACKLOG_WAIT_TIME  0x0020

#define AUDIT_VERSION_BACKLOG_LIMIT     1

#define AUDIT_VERSION_BACKLOG_WAIT_TIME 2

#define AUDIT_VERSION_LATEST AUDIT_VERSION_BACKLOG_WAIT_TIME

                                /* Failure-to-log actions */

#define AUDIT_FAIL_SILENT       0

#define AUDIT_FAIL_PRINTK       1

#define AUDIT_FAIL_PANIC        2

/* distinguish syscall tables */

#define __AUDIT_ARCH_64BIT 0x80000000

#define __AUDIT_ARCH_LE    0x40000000

#define AUDIT_ARCH_ALPHA        (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_ARM          (EM_ARM|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_ARMEB        (EM_ARM)

#define AUDIT_ARCH_CRIS         (EM_CRIS|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_FRV          (EM_FRV)

#define AUDIT_ARCH_I386         (EM_386|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_IA64         (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_M32R         (EM_M32R)

#define AUDIT_ARCH_M68K         (EM_68K)

#define AUDIT_ARCH_MIPS         (EM_MIPS)

#define AUDIT_ARCH_MIPSEL       (EM_MIPS|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_MIPS64       (EM_MIPS|__AUDIT_ARCH_64BIT)

#define AUDIT_ARCH_MIPSEL64     (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_OPENRISC     (EM_OPENRISC)

#define AUDIT_ARCH_PARISC       (EM_PARISC)

#define AUDIT_ARCH_PARISC64     (EM_PARISC|__AUDIT_ARCH_64BIT)

#define AUDIT_ARCH_PPC          (EM_PPC)

#define AUDIT_ARCH_PPC64        (EM_PPC64|__AUDIT_ARCH_64BIT)

#define AUDIT_ARCH_S390         (EM_S390)

#define AUDIT_ARCH_S390X        (EM_S390|__AUDIT_ARCH_64BIT)

#define AUDIT_ARCH_SH           (EM_SH)

#define AUDIT_ARCH_SHEL         (EM_SH|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_SH64         (EM_SH|__AUDIT_ARCH_64BIT)

#define AUDIT_ARCH_SHEL64       (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)

#define AUDIT_ARCH_SPARC        (EM_SPARC)

#define AUDIT_ARCH_SPARC64      (EM_SPARCV9|__AUDIT_ARCH_64BIT)

#define AUDIT_ARCH_X86_64       (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)

#define AUDIT_PERM_EXEC         1

#define AUDIT_PERM_WRITE        2

#define AUDIT_PERM_READ         4

#define AUDIT_PERM_ATTR         8

/* MAX_AUDIT_MESSAGE_LENGTH is set in audit:lib/libaudit.h as:

 * 8970 // PATH_MAX*2+CONTEXT_SIZE*2+11+256+1

 * max header+body+tailer: 44 + 29 + 32 + 262 + 7 + pad

 */

#define AUDIT_MESSAGE_TEXT_MAX  8560

struct audit_status {

        __u32           mask;           /* Bit mask for valid entries */

        __u32           enabled;        /* 1 = enabled, 0 = disabled */

        __u32           failure;        /* Failure-to-log action */

        __u32           pid;            /* pid of auditd process */

        __u32           rate_limit;     /* messages rate limit (per second) */

        __u32           backlog_limit;  /* waiting messages limit */

        __u32           lost;           /* messages lost */

        __u32           backlog;        /* messages waiting in queue */

        __u32           version;        /* audit api version number */

        __u32           backlog_wait_time;/* message queue wait timeout */

};

struct audit_features {

#define AUDIT_FEATURE_VERSION   1

        __u32   vers;

        __u32   mask;           /* which bits we are dealing with */

        __u32   features;       /* which feature to enable/disable */

        __u32   lock;           /* which features to lock */

};

#define AUDIT_FEATURE_ONLY_UNSET_LOGINUID       0

#define AUDIT_FEATURE_LOGINUID_IMMUTABLE        1

#define AUDIT_LAST_FEATURE                      AUDIT_FEATURE_LOGINUID_IMMUTABLE

#define audit_feature_valid(x)          ((x) >= 0 && (x) <= AUDIT_LAST_FEATURE)

#define AUDIT_FEATURE_TO_MASK(x)        (1 << ((x) & 31)) /* mask for __u32 */

struct audit_tty_status {

        __u32           enabled;        /* 1 = enabled, 0 = disabled */

        __u32           log_passwd;     /* 1 = enabled, 0 = disabled */

};

#define AUDIT_UID_UNSET (unsigned int)-1

/* audit_rule_data supports filter rules with both integer and string

 * fields.  It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and

 * AUDIT_LIST_RULES requests.

 */

struct audit_rule_data {

        __u32           flags;  /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */

        __u32           action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */

        __u32           field_count;

        __u32           mask[AUDIT_BITMASK_SIZE]; /* syscall(s) affected */

        __u32           fields[AUDIT_MAX_FIELDS];

        __u32           values[AUDIT_MAX_FIELDS];

        __u32           fieldflags[AUDIT_MAX_FIELDS];

        __u32           buflen; /* total length of string fields */

        char            buf[0];  /* string fields buffer */

};

/* audit_rule is supported to maintain backward compatibility with

 * userspace.  It supports integer fields only and corresponds to

 * AUDIT_ADD, AUDIT_DEL and AUDIT_LIST requests.

 */

struct audit_rule {             /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */

        __u32           flags;  /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */

        __u32           action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */

        __u32           field_count;

        __u32           mask[AUDIT_BITMASK_SIZE];

        __u32           fields[AUDIT_MAX_FIELDS];

        __u32           values[AUDIT_MAX_FIELDS];

};

#endif /* _LINUX_AUDIT_H_ */