1 /*
2  * Copyright (C) 2008 IBM Corporation
3  * Author: Mimi Zohar <zohar@us.ibm.com>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation, version 2 of the License.
8  *
9  * File: integrity_audit.c
10  *	Audit calls for the integrity subsystem
11  */
12 
13 #include <linux/fs.h>
14 #include <linux/gfp.h>
15 #include <linux/audit.h>
16 #include "integrity.h"
17 
18 static int integrity_audit_info;
19 
20 /* ima_audit_setup - enable informational auditing messages */
21 static int __init integrity_audit_setup(char *str)
22 {
23 	unsigned long audit;
24 
25 	if (!kstrtoul(str, 0, &audit))
26 		integrity_audit_info = audit ? 1 : 0;
27 	return 1;
28 }
29 __setup("integrity_audit=", integrity_audit_setup);
30 
31 void integrity_audit_msg(int audit_msgno, struct inode *inode,
32 			 const unsigned char *fname, const char *op,
33 			 const char *cause, int result, int audit_info)
34 {
35 	struct audit_buffer *ab;
36 	char name[TASK_COMM_LEN];
37 
38 	if (!integrity_audit_info && audit_info == 1)	/* Skip info messages */
39 		return;
40 
41 	ab = audit_log_start(audit_context(), GFP_KERNEL, audit_msgno);
42 	audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
43 			 task_pid_nr(current),
44 			 from_kuid(&init_user_ns, current_cred()->uid),
45 			 from_kuid(&init_user_ns, audit_get_loginuid(current)),
46 			 audit_get_sessionid(current));
47 	audit_log_task_context(ab);
48 	audit_log_format(ab, " op=");
49 	audit_log_string(ab, op);
50 	audit_log_format(ab, " cause=");
51 	audit_log_string(ab, cause);
52 	audit_log_format(ab, " comm=");
53 	audit_log_untrustedstring(ab, get_task_comm(name, current));
54 	if (fname) {
55 		audit_log_format(ab, " name=");
56 		audit_log_untrustedstring(ab, fname);
57 	}
58 	if (inode) {
59 		audit_log_format(ab, " dev=");
60 		audit_log_untrustedstring(ab, inode->i_sb->s_id);
61 		audit_log_format(ab, " ino=%lu", inode->i_ino);
62 	}
63 	audit_log_format(ab, " res=%d", !result);
64 	audit_log_end(ab);
65 }
66