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 (!strict_strtoul(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 
37 	if (!integrity_audit_info && audit_info == 1)	/* Skip info messages */
38 		return;
39 
40 	ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
41 	audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
42 			 current->pid,
43 			 from_kuid(&init_user_ns, current_cred()->uid),
44 			 from_kuid(&init_user_ns, audit_get_loginuid(current)),
45 			 audit_get_sessionid(current));
46 	audit_log_task_context(ab);
47 	audit_log_format(ab, " op=");
48 	audit_log_string(ab, op);
49 	audit_log_format(ab, " cause=");
50 	audit_log_string(ab, cause);
51 	audit_log_format(ab, " comm=");
52 	audit_log_untrustedstring(ab, current->comm);
53 	if (fname) {
54 		audit_log_format(ab, " name=");
55 		audit_log_untrustedstring(ab, fname);
56 	}
57 	if (inode) {
58 		audit_log_format(ab, " dev=");
59 		audit_log_untrustedstring(ab, inode->i_sb->s_id);
60 		audit_log_format(ab, " ino=%lu", inode->i_ino);
61 	}
62 	audit_log_format(ab, " res=%d", !result);
63 	audit_log_end(ab);
64 }
65