| Mimi Zohar | 3323eec9 | 2009-02-04 09:06:58 -0500 | [diff] [blame^] | 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 | } |