SAFE public projects git trees. - safe/jmp/linux-2.6/blob - security/integrity/ima/ima_audit.c

   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
  17 static int ima_audit;
  18
  19 #ifdef CONFIG_IMA_AUDIT
  20
  21 /* ima_audit_setup - enable informational auditing messages */
  22 static int __init ima_audit_setup(char *str)
  23 {
  24         unsigned long audit;
  25         int rc;
  26         char *op;
  27
  28         rc = strict_strtoul(str, 0, &audit);
  29         if (rc || audit > 1)
  30                 printk(KERN_INFO "ima: invalid ima_audit value\n");
  31         else
  32                 ima_audit = audit;
  33         op = ima_audit ? "ima_audit_enabled" : "ima_audit_not_enabled";
  34         integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL, NULL, op, 0, 0);
  35         return 1;
  36 }
  37 __setup("ima_audit=", ima_audit_setup);
  38 #endif
  39
  40 void integrity_audit_msg(int audit_msgno, struct inode *inode,
  41                          const unsigned char *fname, const char *op,
  42                          const char *cause, int result, int audit_info)
  43 {
  44         struct audit_buffer *ab;
  45
  46         if (!ima_audit && audit_info == 1) /* Skip informational messages */
  47                 return;
  48
  49         ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
  50         audit_log_format(ab, "integrity: pid=%d uid=%u auid=%u",
  51                          current->pid, current->cred->uid,
  52                          audit_get_loginuid(current));
  53         audit_log_task_context(ab);
  54         switch (audit_msgno) {
  55         case AUDIT_INTEGRITY_DATA:
  56         case AUDIT_INTEGRITY_METADATA:
  57         case AUDIT_INTEGRITY_PCR:
  58                 audit_log_format(ab, " op=%s cause=%s", op, cause);
  59                 break;
  60         case AUDIT_INTEGRITY_HASH:
  61                 audit_log_format(ab, " op=%s hash=%s", op, cause);
  62                 break;
  63         case AUDIT_INTEGRITY_STATUS:
  64         default:
  65                 audit_log_format(ab, " op=%s", op);
  66         }
  67         audit_log_format(ab, " comm=");
  68         audit_log_untrustedstring(ab, current->comm);
  69         if (fname) {
  70                 audit_log_format(ab, " name=");
  71                 audit_log_untrustedstring(ab, fname);
  72         }
  73         if (inode)
  74                 audit_log_format(ab, " dev=%s ino=%lu",
  75                                  inode->i_sb->s_id, inode->i_ino);
  76         audit_log_format(ab, " res=%d", result);
  77         audit_log_end(ab);
  78 }