/*
* 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, result = 0;
char *op = "ima_audit";
char *cause;
rc = strict_strtoul(str, 0, &audit);
if (rc || audit > 1)
result = 1;
else
ima_audit = audit;
cause = ima_audit ? "enabled" : "not_enabled";
integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL,
op, cause, result, 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 ses=%u",
current->pid, current->cred->uid,
audit_get_loginuid(current),
audit_get_sessionid(current));
audit_log_task_context(ab);
switch (audit_msgno) {
case AUDIT_INTEGRITY_DATA:
case AUDIT_INTEGRITY_METADATA:
case AUDIT_INTEGRITY_PCR:
case AUDIT_INTEGRITY_STATUS:
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;
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 ? 0 : 1);
audit_log_end(ab);
}
