289 lines
11 KiB
C
289 lines
11 KiB
C
/* audit.h -- Auditing support
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*
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* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Written by Rickard E. (Rik) Faith <faith@redhat.com>
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*
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*/
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#ifndef _LINUX_AUDIT_H_
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#define _LINUX_AUDIT_H_
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#include <linux/sched.h>
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#include <linux/elf.h>
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/* The netlink messages for the audit system is divided into blocks:
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* 1000 - 1099 are for commanding the audit system
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* 1100 - 1199 user space trusted application messages
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* 1200 - 1299 messages internal to the audit daemon
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* 1300 - 1399 audit event messages
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* 1400 - 1499 SE Linux use
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* 1500 - 1999 future use
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* 2000 is for otherwise unclassified kernel audit messages
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*
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* Messages from 1000-1199 are bi-directional. 1200-1299 are exclusively user
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* space. Anything over that is kernel --> user space communication.
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*/
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#define AUDIT_GET 1000 /* Get status */
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#define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */
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#define AUDIT_LIST 1002 /* List syscall filtering rules */
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#define AUDIT_ADD 1003 /* Add syscall filtering rule */
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#define AUDIT_DEL 1004 /* Delete syscall filtering rule */
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#define AUDIT_USER 1005 /* Message from userspace -- deprecated */
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#define AUDIT_LOGIN 1006 /* Define the login id and information */
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#define AUDIT_WATCH_INS 1007 /* Insert file/dir watch entry */
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#define AUDIT_WATCH_REM 1008 /* Remove file/dir watch entry */
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#define AUDIT_WATCH_LIST 1009 /* List all file/dir watches */
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#define AUDIT_SIGNAL_INFO 1010 /* Get info about sender of signal to auditd */
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#define AUDIT_FIRST_USER_MSG 1100 /* Userspace messages uninteresting to kernel */
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#define AUDIT_LAST_USER_MSG 1199
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#define AUDIT_DAEMON_START 1200 /* Daemon startup record */
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#define AUDIT_DAEMON_END 1201 /* Daemon normal stop record */
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#define AUDIT_DAEMON_ABORT 1202 /* Daemon error stop record */
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#define AUDIT_DAEMON_CONFIG 1203 /* Daemon config change */
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#define AUDIT_SYSCALL 1300 /* Syscall event */
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#define AUDIT_FS_WATCH 1301 /* Filesystem watch event */
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#define AUDIT_PATH 1302 /* Filename path information */
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#define AUDIT_IPC 1303 /* IPC record */
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#define AUDIT_SOCKETCALL 1304 /* sys_socketcall arguments */
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#define AUDIT_CONFIG_CHANGE 1305 /* Audit system configuration change */
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#define AUDIT_SOCKADDR 1306 /* sockaddr copied as syscall arg */
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#define AUDIT_CWD 1307 /* Current working directory */
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#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
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#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
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#define AUDIT_AVC_PATH 1402 /* dentry, vfsmount pair from avc */
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#define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
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/* Rule flags */
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#define AUDIT_PER_TASK 0x01 /* Apply rule at task creation (not syscall) */
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#define AUDIT_AT_ENTRY 0x02 /* Apply rule at syscall entry */
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#define AUDIT_AT_EXIT 0x04 /* Apply rule at syscall exit */
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#define AUDIT_PREPEND 0x10 /* Prepend to front of list */
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/* Rule actions */
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#define AUDIT_NEVER 0 /* Do not build context if rule matches */
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#define AUDIT_POSSIBLE 1 /* Build context if rule matches */
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#define AUDIT_ALWAYS 2 /* Generate audit record if rule matches */
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/* Rule structure sizes -- if these change, different AUDIT_ADD and
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* AUDIT_LIST commands must be implemented. */
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#define AUDIT_MAX_FIELDS 64
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#define AUDIT_BITMASK_SIZE 64
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#define AUDIT_WORD(nr) ((__u32)((nr)/32))
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#define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32))
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/* Rule fields */
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/* These are useful when checking the
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* task structure at task creation time
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* (AUDIT_PER_TASK). */
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#define AUDIT_PID 0
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#define AUDIT_UID 1
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#define AUDIT_EUID 2
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#define AUDIT_SUID 3
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#define AUDIT_FSUID 4
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#define AUDIT_GID 5
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#define AUDIT_EGID 6
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#define AUDIT_SGID 7
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#define AUDIT_FSGID 8
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#define AUDIT_LOGINUID 9
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#define AUDIT_PERS 10
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#define AUDIT_ARCH 11
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/* These are ONLY useful when checking
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* at syscall exit time (AUDIT_AT_EXIT). */
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#define AUDIT_DEVMAJOR 100
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#define AUDIT_DEVMINOR 101
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#define AUDIT_INODE 102
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#define AUDIT_EXIT 103
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#define AUDIT_SUCCESS 104 /* exit >= 0; value ignored */
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#define AUDIT_ARG0 200
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#define AUDIT_ARG1 (AUDIT_ARG0+1)
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#define AUDIT_ARG2 (AUDIT_ARG0+2)
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#define AUDIT_ARG3 (AUDIT_ARG0+3)
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#define AUDIT_NEGATE 0x80000000
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/* Status symbols */
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/* Mask values */
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#define AUDIT_STATUS_ENABLED 0x0001
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#define AUDIT_STATUS_FAILURE 0x0002
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#define AUDIT_STATUS_PID 0x0004
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#define AUDIT_STATUS_RATE_LIMIT 0x0008
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#define AUDIT_STATUS_BACKLOG_LIMIT 0x0010
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/* Failure-to-log actions */
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#define AUDIT_FAIL_SILENT 0
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#define AUDIT_FAIL_PRINTK 1
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#define AUDIT_FAIL_PANIC 2
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/* distinguish syscall tables */
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#define __AUDIT_ARCH_64BIT 0x80000000
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#define __AUDIT_ARCH_LE 0x40000000
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#define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_ARMEB (EM_ARM)
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#define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_FRV (EM_FRV)
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#define AUDIT_ARCH_H8300 (EM_H8_300)
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#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_M32R (EM_M32R)
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#define AUDIT_ARCH_M68K (EM_68K)
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#define AUDIT_ARCH_MIPS (EM_MIPS)
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#define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
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#define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_PARISC (EM_PARISC)
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#define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
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#define AUDIT_ARCH_PPC (EM_PPC)
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#define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
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#define AUDIT_ARCH_S390 (EM_S390)
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#define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
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#define AUDIT_ARCH_SH (EM_SH)
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#define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT)
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#define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_SPARC (EM_SPARC)
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#define AUDIT_ARCH_SPARC64 (EM_SPARC64|__AUDIT_ARCH_64BIT)
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#define AUDIT_ARCH_V850 (EM_V850|__AUDIT_ARCH_LE)
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#define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
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struct audit_status {
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__u32 mask; /* Bit mask for valid entries */
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__u32 enabled; /* 1 = enabled, 0 = disabled */
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__u32 failure; /* Failure-to-log action */
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__u32 pid; /* pid of auditd process */
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__u32 rate_limit; /* messages rate limit (per second) */
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__u32 backlog_limit; /* waiting messages limit */
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__u32 lost; /* messages lost */
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__u32 backlog; /* messages waiting in queue */
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};
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struct audit_rule { /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
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__u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
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__u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
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__u32 field_count;
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__u32 mask[AUDIT_BITMASK_SIZE];
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__u32 fields[AUDIT_MAX_FIELDS];
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__u32 values[AUDIT_MAX_FIELDS];
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};
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#ifdef __KERNEL__
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struct audit_sig_info {
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uid_t uid;
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pid_t pid;
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};
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struct audit_buffer;
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struct audit_context;
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struct inode;
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#define AUDITSC_INVALID 0
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#define AUDITSC_SUCCESS 1
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#define AUDITSC_FAILURE 2
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#define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
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#ifdef CONFIG_AUDITSYSCALL
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/* These are defined in auditsc.c */
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/* Public API */
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extern int audit_alloc(struct task_struct *task);
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extern void audit_free(struct task_struct *task);
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extern void audit_syscall_entry(struct task_struct *task, int arch,
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int major, unsigned long a0, unsigned long a1,
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unsigned long a2, unsigned long a3);
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extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code);
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extern void audit_getname(const char *name);
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extern void audit_putname(const char *name);
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extern void audit_inode(const char *name, const struct inode *inode);
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/* Private API (for audit.c only) */
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extern int audit_receive_filter(int type, int pid, int uid, int seq,
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void *data, uid_t loginuid);
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extern unsigned int audit_serial(void);
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extern void auditsc_get_stamp(struct audit_context *ctx,
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struct timespec *t, unsigned int *serial);
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extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
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extern uid_t audit_get_loginuid(struct audit_context *ctx);
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extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
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extern int audit_socketcall(int nargs, unsigned long *args);
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extern int audit_sockaddr(int len, void *addr);
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extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt);
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extern void audit_signal_info(int sig, struct task_struct *t);
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#else
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#define audit_alloc(t) ({ 0; })
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#define audit_free(t) do { ; } while (0)
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#define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0)
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#define audit_syscall_exit(t,f,r) do { ; } while (0)
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#define audit_getname(n) do { ; } while (0)
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#define audit_putname(n) do { ; } while (0)
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#define audit_inode(n,i) do { ; } while (0)
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#define audit_receive_filter(t,p,u,s,d,l) ({ -EOPNOTSUPP; })
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#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
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#define audit_get_loginuid(c) ({ -1; })
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#define audit_ipc_perms(q,u,g,m) ({ 0; })
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#define audit_socketcall(n,a) ({ 0; })
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#define audit_sockaddr(len, addr) ({ 0; })
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#define audit_avc_path(dentry, mnt) ({ 0; })
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#define audit_signal_info(s,t) do { ; } while (0)
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#endif
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#ifdef CONFIG_AUDIT
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/* These are defined in audit.c */
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/* Public API */
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extern void audit_log(struct audit_context *ctx, int type,
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const char *fmt, ...)
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__attribute__((format(printf,3,4)));
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extern struct audit_buffer *audit_log_start(struct audit_context *ctx,int type);
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extern void audit_log_format(struct audit_buffer *ab,
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const char *fmt, ...)
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__attribute__((format(printf,2,3)));
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extern void audit_log_end(struct audit_buffer *ab);
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extern void audit_log_hex(struct audit_buffer *ab,
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const unsigned char *buf,
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size_t len);
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extern void audit_log_untrustedstring(struct audit_buffer *ab,
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const char *string);
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extern void audit_log_d_path(struct audit_buffer *ab,
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const char *prefix,
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struct dentry *dentry,
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struct vfsmount *vfsmnt);
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/* Private API (for auditsc.c only) */
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extern void audit_send_reply(int pid, int seq, int type,
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int done, int multi,
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void *payload, int size);
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extern void audit_log_lost(const char *message);
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#else
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#define audit_log(c,t,f,...) do { ; } while (0)
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#define audit_log_start(c,t) ({ NULL; })
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#define audit_log_vformat(b,f,a) do { ; } while (0)
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#define audit_log_format(b,f,...) do { ; } while (0)
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#define audit_log_end(b) do { ; } while (0)
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#define audit_log_hex(a,b,l) do { ; } while (0)
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#define audit_log_untrustedstring(a,s) do { ; } while (0)
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#define audit_log_d_path(b,p,d,v) do { ; } while (0)
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#endif
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#endif
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#endif
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