LXR linux/security/integrity/ima/ima

   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/audit.h>
  15#include "ima.h"
  16
  17static int ima_audit;
  18
  19#ifdef CONFIG_IMA_AUDIT
  20
  21/* ima_audit_setup - enable informational auditing messages */
  22static int __init ima_audit_setup(char *str)
  23{
  24        unsigned long audit;
  25
  26        if (!strict_strtoul(str, 0, &audit))
  27                ima_audit = audit ? 1 : 0;
  28        return 1;
  29}
  30__setup("ima_audit=", ima_audit_setup);
  31#endif
  32
  33void integrity_audit_msg(int audit_msgno, struct inode *inode,
  34                         const unsigned char *fname, const char *op,
  35                         const char *cause, int result, int audit_info)
  36{
  37        struct audit_buffer *ab;
  38
  39        if (!ima_audit && audit_info == 1) /* Skip informational messages */
  40                return;
  41
  42        ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
  43        audit_log_format(ab, "integrity: pid=%d uid=%u auid=%u ses=%u",
  44                         current->pid, current_cred()->uid,
  45                         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, current->comm);
  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=%s ino=%lu",
  60                                 inode->i_sb->s_id, inode->i_ino);
  61        audit_log_format(ab, " res=%d", !result ? 0 : 1);
  62        audit_log_end(ab);
  63}
  64