audit.h

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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 <[email protected]>
 *
 */

#ifndef _UAPI_LINUX_AUDIT_H_
#define _UAPI_LINUX_AUDIT_H_

#include <linux/types.h>
#include <linux/elf-em.h>
#include <linux/ptrace.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_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_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

                /* 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
                /* 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_H8300    (EM_H8_300)
#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

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 */
};

struct audit_tty_status {
    __u32       enabled; /* 1 = enabled, 0 = disabled */
};

/* 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 /* _UAPI_LINUX_AUDIT_H_ */