| /* 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/sched.h> |
| #include <linux/elf.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 - 1999 future kernel use (maybe integrity labels and related events) |
| * 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 filtering rules */ |
| #define AUDIT_ADD 1003 /* Add syscall filtering rule */ |
| #define AUDIT_DEL 1004 /* Delete syscall filtering rule */ |
| #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_FIRST_USER_MSG 1100 /* Userspace messages mostly uninteresting to kernel */ |
| #define AUDIT_USER_AVC 1107 /* We filter this differently */ |
| #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 /* Filesystem watch event */ |
| #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_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_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_NR_FILTERS 5 |
| |
| #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_BITMASK_SIZE 64 |
| #define AUDIT_WORD(nr) ((__u32)((nr)/32)) |
| #define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32)) |
| |
| /* 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 0x0FFFFC00 |
| |
| |
| /* 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 |
| |
| /* 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_ARG0 200 |
| #define AUDIT_ARG1 (AUDIT_ARG0+1) |
| #define AUDIT_ARG2 (AUDIT_ARG0+2) |
| #define AUDIT_ARG3 (AUDIT_ARG0+3) |
| |
| #define AUDIT_NEGATE 0x80000000 |
| |
| /* These are the supported operators. |
| * 4 2 1 |
| * = > < |
| * ------- |
| * 0 0 0 0 nonsense |
| * 0 0 1 1 < |
| * 0 1 0 2 > |
| * 0 1 1 3 != |
| * 1 0 0 4 = |
| * 1 0 1 5 <= |
| * 1 1 0 6 >= |
| * 1 1 1 7 all operators |
| */ |
| #define AUDIT_LESS_THAN 0x10000000 |
| #define AUDIT_GREATER_THAN 0x20000000 |
| #define AUDIT_NOT_EQUAL 0x30000000 |
| #define AUDIT_EQUAL 0x40000000 |
| #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) |
| |
| /* 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_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_V850 (EM_V850|__AUDIT_ARCH_LE) |
| #define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) |
| |
| 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_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]; |
| }; |
| |
| #ifdef __KERNEL__ |
| |
| struct audit_sig_info { |
| uid_t uid; |
| pid_t pid; |
| }; |
| |
| struct audit_buffer; |
| struct audit_context; |
| struct inode; |
| struct netlink_skb_parms; |
| |
| #define AUDITSC_INVALID 0 |
| #define AUDITSC_SUCCESS 1 |
| #define AUDITSC_FAILURE 2 |
| #define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS ) |
| #ifdef CONFIG_AUDITSYSCALL |
| /* These are defined in auditsc.c */ |
| /* Public API */ |
| extern int audit_alloc(struct task_struct *task); |
| extern void audit_free(struct task_struct *task); |
| extern void audit_syscall_entry(struct task_struct *task, int arch, |
| int major, unsigned long a0, unsigned long a1, |
| unsigned long a2, unsigned long a3); |
| extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code); |
| extern void audit_getname(const char *name); |
| extern void audit_putname(const char *name); |
| extern void __audit_inode(const char *name, const struct inode *inode, unsigned flags); |
| extern void __audit_inode_child(const char *dname, const struct inode *inode, |
| unsigned long pino); |
| static inline void audit_inode(const char *name, const struct inode *inode, |
| unsigned flags) { |
| if (unlikely(current->audit_context)) |
| __audit_inode(name, inode, flags); |
| } |
| static inline void audit_inode_child(const char *dname, |
| const struct inode *inode, |
| unsigned long pino) { |
| if (unlikely(current->audit_context)) |
| __audit_inode_child(dname, inode, pino); |
| } |
| |
| /* Private API (for audit.c only) */ |
| extern int audit_receive_filter(int type, int pid, int uid, int seq, |
| void *data, uid_t loginuid); |
| extern unsigned int audit_serial(void); |
| extern void auditsc_get_stamp(struct audit_context *ctx, |
| struct timespec *t, unsigned int *serial); |
| extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid); |
| extern uid_t audit_get_loginuid(struct audit_context *ctx); |
| extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode); |
| extern int audit_socketcall(int nargs, unsigned long *args); |
| extern int audit_sockaddr(int len, void *addr); |
| extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt); |
| extern void audit_signal_info(int sig, struct task_struct *t); |
| extern int audit_filter_user(struct netlink_skb_parms *cb, int type); |
| #else |
| #define audit_alloc(t) ({ 0; }) |
| #define audit_free(t) do { ; } while (0) |
| #define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0) |
| #define audit_syscall_exit(t,f,r) do { ; } while (0) |
| #define audit_getname(n) do { ; } while (0) |
| #define audit_putname(n) do { ; } while (0) |
| #define __audit_inode(n,i,f) do { ; } while (0) |
| #define __audit_inode_child(d,i,p) do { ; } while (0) |
| #define audit_inode(n,i,f) do { ; } while (0) |
| #define audit_inode_child(d,i,p) do { ; } while (0) |
| #define audit_receive_filter(t,p,u,s,d,l) ({ -EOPNOTSUPP; }) |
| #define auditsc_get_stamp(c,t,s) do { BUG(); } while (0) |
| #define audit_get_loginuid(c) ({ -1; }) |
| #define audit_ipc_perms(q,u,g,m) ({ 0; }) |
| #define audit_socketcall(n,a) ({ 0; }) |
| #define audit_sockaddr(len, addr) ({ 0; }) |
| #define audit_avc_path(dentry, mnt) ({ 0; }) |
| #define audit_signal_info(s,t) do { ; } while (0) |
| #define audit_filter_user(cb,t) ({ 1; }) |
| #endif |
| |
| #ifdef CONFIG_AUDIT |
| /* These are defined in audit.c */ |
| /* Public API */ |
| extern void audit_log(struct audit_context *ctx, gfp_t gfp_mask, |
| int type, const char *fmt, ...) |
| __attribute__((format(printf,4,5))); |
| |
| extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type); |
| extern void audit_log_format(struct audit_buffer *ab, |
| const char *fmt, ...) |
| __attribute__((format(printf,2,3))); |
| extern void audit_log_end(struct audit_buffer *ab); |
| extern void audit_log_hex(struct audit_buffer *ab, |
| const unsigned char *buf, |
| size_t len); |
| extern void audit_log_untrustedstring(struct audit_buffer *ab, |
| const char *string); |
| extern void audit_log_d_path(struct audit_buffer *ab, |
| const char *prefix, |
| struct dentry *dentry, |
| struct vfsmount *vfsmnt); |
| /* Private API (for auditsc.c only) */ |
| extern void audit_send_reply(int pid, int seq, int type, |
| int done, int multi, |
| void *payload, int size); |
| extern void audit_log_lost(const char *message); |
| extern struct semaphore audit_netlink_sem; |
| #else |
| #define audit_log(c,g,t,f,...) do { ; } while (0) |
| #define audit_log_start(c,g,t) ({ NULL; }) |
| #define audit_log_vformat(b,f,a) do { ; } while (0) |
| #define audit_log_format(b,f,...) do { ; } while (0) |
| #define audit_log_end(b) do { ; } while (0) |
| #define audit_log_hex(a,b,l) do { ; } while (0) |
| #define audit_log_untrustedstring(a,s) do { ; } while (0) |
| #define audit_log_d_path(b,p,d,v) do { ; } while (0) |
| #endif |
| #endif |
| #endif |