166 lines
4.0 KiB
C
166 lines
4.0 KiB
C
/*
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* AppArmor security module
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*
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* This file contains AppArmor auditing functions
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*
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* Copyright (C) 1998-2008 Novell/SUSE
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* Copyright 2009-2010 Canonical Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*/
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#include <linux/audit.h>
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#include <linux/socket.h>
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#include "include/apparmor.h"
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#include "include/audit.h"
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#include "include/policy.h"
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#include "include/policy_ns.h"
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const char *const audit_mode_names[] = {
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"normal",
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"quiet_denied",
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"quiet",
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"noquiet",
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"all"
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};
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static const char *const aa_audit_type[] = {
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"AUDIT",
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"ALLOWED",
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"DENIED",
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"HINT",
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"STATUS",
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"ERROR",
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"KILLED",
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"AUTO"
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};
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/*
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* Currently AppArmor auditing is fed straight into the audit framework.
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*
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* TODO:
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* netlink interface for complain mode
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* user auditing, - send user auditing to netlink interface
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* system control of whether user audit messages go to system log
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*/
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/**
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* audit_base - core AppArmor function.
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* @ab: audit buffer to fill (NOT NULL)
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* @ca: audit structure containing data to audit (NOT NULL)
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*
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* Record common AppArmor audit data from @sa
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*/
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static void audit_pre(struct audit_buffer *ab, void *ca)
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{
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struct common_audit_data *sa = ca;
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if (aa_g_audit_header) {
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audit_log_format(ab, "apparmor=");
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audit_log_string(ab, aa_audit_type[aad(sa)->type]);
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}
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if (aad(sa)->op) {
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audit_log_format(ab, " operation=");
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audit_log_string(ab, aad(sa)->op);
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}
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if (aad(sa)->info) {
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audit_log_format(ab, " info=");
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audit_log_string(ab, aad(sa)->info);
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if (aad(sa)->error)
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audit_log_format(ab, " error=%d", aad(sa)->error);
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}
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if (aad(sa)->label) {
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struct aa_label *label = aad(sa)->label;
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if (label_isprofile(label)) {
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struct aa_profile *profile = labels_profile(label);
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if (profile->ns != root_ns) {
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audit_log_format(ab, " namespace=");
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audit_log_untrustedstring(ab,
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profile->ns->base.hname);
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}
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audit_log_format(ab, " profile=");
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audit_log_untrustedstring(ab, profile->base.hname);
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} else {
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audit_log_format(ab, " label=");
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aa_label_xaudit(ab, root_ns, label, FLAG_VIEW_SUBNS,
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GFP_ATOMIC);
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}
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}
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if (aad(sa)->name) {
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audit_log_format(ab, " name=");
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audit_log_untrustedstring(ab, aad(sa)->name);
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}
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}
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/**
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* aa_audit_msg - Log a message to the audit subsystem
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* @sa: audit event structure (NOT NULL)
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* @cb: optional callback fn for type specific fields (MAYBE NULL)
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*/
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void aa_audit_msg(int type, struct common_audit_data *sa,
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void (*cb) (struct audit_buffer *, void *))
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{
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aad(sa)->type = type;
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common_lsm_audit(sa, audit_pre, cb);
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}
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/**
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* aa_audit - Log a profile based audit event to the audit subsystem
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* @type: audit type for the message
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* @profile: profile to check against (NOT NULL)
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* @sa: audit event (NOT NULL)
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* @cb: optional callback fn for type specific fields (MAYBE NULL)
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*
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* Handle default message switching based off of audit mode flags
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*
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* Returns: error on failure
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*/
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int aa_audit(int type, struct aa_profile *profile, struct common_audit_data *sa,
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void (*cb) (struct audit_buffer *, void *))
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{
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AA_BUG(!profile);
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if (type == AUDIT_APPARMOR_AUTO) {
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if (likely(!aad(sa)->error)) {
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if (AUDIT_MODE(profile) != AUDIT_ALL)
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return 0;
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type = AUDIT_APPARMOR_AUDIT;
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} else if (COMPLAIN_MODE(profile))
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type = AUDIT_APPARMOR_ALLOWED;
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else
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type = AUDIT_APPARMOR_DENIED;
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}
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if (AUDIT_MODE(profile) == AUDIT_QUIET ||
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(type == AUDIT_APPARMOR_DENIED &&
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AUDIT_MODE(profile) == AUDIT_QUIET))
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return aad(sa)->error;
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if (KILL_MODE(profile) && type == AUDIT_APPARMOR_DENIED)
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type = AUDIT_APPARMOR_KILL;
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aad(sa)->label = &profile->label;
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aa_audit_msg(type, sa, cb);
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if (aad(sa)->type == AUDIT_APPARMOR_KILL)
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(void)send_sig_info(SIGKILL, NULL,
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sa->type == LSM_AUDIT_DATA_TASK && sa->u.tsk ?
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sa->u.tsk : current);
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if (aad(sa)->type == AUDIT_APPARMOR_ALLOWED)
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return complain_error(aad(sa)->error);
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return aad(sa)->error;
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}
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