197 lines
6.7 KiB
C
197 lines
6.7 KiB
C
/* audit.h -- Auditing support -*- linux-c -*-
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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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/* Request and reply types */
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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 filtering rules */
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#define AUDIT_ADD 1003 /* Add filtering rule */
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#define AUDIT_DEL 1004 /* Delete filtering rule */
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#define AUDIT_USER 1005 /* Send a message from user-space */
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#define AUDIT_LOGIN 1006 /* Define the login id and informaiton */
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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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/* 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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#ifndef __KERNEL__
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struct audit_message {
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struct nlmsghdr nlh;
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char data[1200];
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};
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#endif
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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 = disbaled */
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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_buffer;
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struct audit_context;
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struct inode;
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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,
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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 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);
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extern void audit_get_stamp(struct audit_context *ctx,
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struct timespec *t, int *serial);
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extern int audit_set_loginuid(struct audit_context *ctx, 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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#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,a,b,c,d,e) do { ; } while (0)
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#define audit_syscall_exit(t,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_get_loginuid(c) ({ -1; })
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#define audit_ipc_perms(q,u,g,m) ({ 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,
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const char *fmt, ...)
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__attribute__((format(printf,2,3)));
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extern struct audit_buffer *audit_log_start(struct audit_context *ctx);
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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_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(t,f,...) do { ; } while (0)
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#define audit_log_start(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_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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