/* audit.h -- Auditing support -*- linux-c -*- * * 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 * */ #ifndef _LINUX_AUDIT_H_ #define _LINUX_AUDIT_H_ /* Request and reply types */ #define AUDIT_GET 1000 /* Get status */ #define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */ #define AUDIT_LIST 1002 /* List filtering rules */ #define AUDIT_ADD 1003 /* Add filtering rule */ #define AUDIT_DEL 1004 /* Delete filtering rule */ #define AUDIT_USER 1005 /* Send a message from user-space */ #define AUDIT_LOGIN 1006 /* Define the login id and informaiton */ #define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */ /* Rule flags */ #define AUDIT_PER_TASK 0x01 /* Apply rule at task creation (not syscall) */ #define AUDIT_AT_ENTRY 0x02 /* Apply rule at syscall entry */ #define AUDIT_AT_EXIT 0x04 /* Apply rule at syscall exit */ #define AUDIT_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)) /* 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 /* 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 /* 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 #ifndef __KERNEL__ struct audit_message { struct nlmsghdr nlh; char data[1200]; }; #endif struct audit_status { __u32 mask; /* Bit mask for valid entries */ __u32 enabled; /* 1 = enabled, 0 = disbaled */ __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_buffer; struct audit_context; struct inode; #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 major, unsigned long a0, unsigned long a1, unsigned long a2, unsigned long a3); extern void audit_syscall_exit(struct task_struct *task, int 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); /* Private API (for audit.c only) */ extern int audit_receive_filter(int type, int pid, int uid, int seq, void *data); extern void audit_get_stamp(struct audit_context *ctx, struct timespec *t, int *serial); extern int audit_set_loginuid(struct audit_context *ctx, 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); #else #define audit_alloc(t) ({ 0; }) #define audit_free(t) do { ; } while (0) #define audit_syscall_entry(t,a,b,c,d,e) do { ; } while (0) #define audit_syscall_exit(t,r) do { ; } while (0) #define audit_getname(n) do { ; } while (0) #define audit_putname(n) do { ; } while (0) #define audit_inode(n,i) do { ; } while (0) #define audit_get_loginuid(c) ({ -1; }) #define audit_ipc_perms(q,u,g,m) ({ 0; }) #endif #ifdef CONFIG_AUDIT /* These are defined in audit.c */ /* Public API */ extern void audit_log(struct audit_context *ctx, const char *fmt, ...) __attribute__((format(printf,2,3))); extern struct audit_buffer *audit_log_start(struct audit_context *ctx); 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); #else #define audit_log(t,f,...) do { ; } while (0) #define audit_log_start(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