1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/*
* Copyright (C) 2008 IBM Corporation
* Author: Mimi Zohar <zohar@us.ibm.com>
*
* 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, version 2 of the License.
*
* File: integrity_audit.c
* Audit calls for the integrity subsystem
*/
#include <linux/fs.h>
#include <linux/audit.h>
#include "ima.h"
static int ima_audit;
#ifdef CONFIG_IMA_AUDIT
/* ima_audit_setup - enable informational auditing messages */
static int __init ima_audit_setup(char *str)
{
unsigned long audit;
int rc;
char *op;
rc = strict_strtoul(str, 0, &audit);
if (rc || audit > 1)
printk(KERN_INFO "ima: invalid ima_audit value\n");
else
ima_audit = audit;
op = ima_audit ? "ima_audit_enabled" : "ima_audit_not_enabled";
integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL, NULL, op, 0, 0);
return 1;
}
__setup("ima_audit=", ima_audit_setup);
#endif
void integrity_audit_msg(int audit_msgno, struct inode *inode,
const unsigned char *fname, const char *op,
const char *cause, int result, int audit_info)
{
struct audit_buffer *ab;
if (!ima_audit && audit_info == 1) /* Skip informational messages */
return;
ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
audit_log_format(ab, "integrity: pid=%d uid=%u auid=%u",
current->pid, current->cred->uid,
audit_get_loginuid(current));
audit_log_task_context(ab);
switch (audit_msgno) {
case AUDIT_INTEGRITY_DATA:
case AUDIT_INTEGRITY_METADATA:
case AUDIT_INTEGRITY_PCR:
audit_log_format(ab, " op=%s cause=%s", op, cause);
break;
case AUDIT_INTEGRITY_HASH:
audit_log_format(ab, " op=%s hash=%s", op, cause);
break;
case AUDIT_INTEGRITY_STATUS:
default:
audit_log_format(ab, " op=%s", op);
}
audit_log_format(ab, " comm=");
audit_log_untrustedstring(ab, current->comm);
if (fname) {
audit_log_format(ab, " name=");
audit_log_untrustedstring(ab, fname);
}
if (inode)
audit_log_format(ab, " dev=%s ino=%lu",
inode->i_sb->s_id, inode->i_ino);
audit_log_format(ab, " res=%d", result);
audit_log_end(ab);
}
|
