79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
|
/*
|
||
|
|
* 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);
|
||
|
|
}
|