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/*
* AppArmor security module
*
* This file contains AppArmor auditing functions
*
* Copyright (C) 1998-2008 Novell/SUSE
* Copyright 2009-2010 Canonical Ltd.
*
* 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.
*/
#include <linux/audit.h>
#include <linux/socket.h>
#include "include/apparmor.h"
#include "include/audit.h"
#include "include/policy.h"
const char *const op_table[] = {
"null",
"sysctl",
"capable",
"unlink",
"mkdir",
"rmdir",
"mknod",
"truncate",
"link",
"symlink",
"rename_src",
"rename_dest",
"chmod",
"chown",
"getattr",
"open",
"file_perm",
"file_lock",
"file_mmap",
"file_mprotect",
"create",
"post_create",
"bind",
"connect",
"listen",
"accept",
"sendmsg",
"recvmsg",
"getsockname",
"getpeername",
"getsockopt",
"setsockopt",
"socket_shutdown",
"ptrace",
"exec",
"change_hat",
"change_profile",
"change_onexec",
"setprocattr",
"setrlimit",
"profile_replace",
"profile_load",
"profile_remove"
};
const char *const audit_mode_names[] = {
"normal",
"quiet_denied",
"quiet",
"noquiet",
"all"
};
static const char *const aa_audit_type[] = {
"AUDIT",
"ALLOWED",
"DENIED",
"HINT",
"STATUS",
"ERROR",
"KILLED"
"AUTO"
};
/*
* Currently AppArmor auditing is fed straight into the audit framework.
*
* TODO:
* netlink interface for complain mode
* user auditing, - send user auditing to netlink interface
* system control of whether user audit messages go to system log
*/
/**
* audit_base - core AppArmor function.
* @ab: audit buffer to fill (NOT NULL)
* @ca: audit structure containing data to audit (NOT NULL)
*
* Record common AppArmor audit data from @sa
*/
static void audit_pre(struct audit_buffer *ab, void *ca)
{
struct common_audit_data *sa = ca;
struct task_struct *tsk = sa->tsk ? sa->tsk : current;
if (aa_g_audit_header) {
audit_log_format(ab, "apparmor=");
audit_log_string(ab, aa_audit_type[sa->aad->type]);
}
if (sa->aad->op) {
audit_log_format(ab, " operation=");
audit_log_string(ab, op_table[sa->aad->op]);
}
if (sa->aad->info) {
audit_log_format(ab, " info=");
audit_log_string(ab, sa->aad->info);
if (sa->aad->error)
audit_log_format(ab, " error=%d", sa->aad->error);
}
if (sa->aad->profile) {
struct aa_profile *profile = sa->aad->profile;
pid_t pid;
rcu_read_lock();
pid = rcu_dereference(tsk->real_parent)->pid;
rcu_read_unlock();
audit_log_format(ab, " parent=%d", pid);
if (profile->ns != root_ns) {
audit_log_format(ab, " namespace=");
audit_log_untrustedstring(ab, profile->ns->base.hname);
}
audit_log_format(ab, " profile=");
audit_log_untrustedstring(ab, profile->base.hname);
}
if (sa->aad->name) {
audit_log_format(ab, " name=");
audit_log_untrustedstring(ab, sa->aad->name);
}
}
/**
* aa_audit_msg - Log a message to the audit subsystem
* @sa: audit event structure (NOT NULL)
* @cb: optional callback fn for type specific fields (MAYBE NULL)
*/
void aa_audit_msg(int type, struct common_audit_data *sa,
void (*cb) (struct audit_buffer *, void *))
{
sa->aad->type = type;
sa->lsm_pre_audit = audit_pre;
sa->lsm_post_audit = cb;
common_lsm_audit(sa);
}
/**
* aa_audit - Log a profile based audit event to the audit subsystem
* @type: audit type for the message
* @profile: profile to check against (NOT NULL)
* @gfp: allocation flags to use
* @sa: audit event (NOT NULL)
* @cb: optional callback fn for type specific fields (MAYBE NULL)
*
* Handle default message switching based off of audit mode flags
*
* Returns: error on failure
*/
int aa_audit(int type, struct aa_profile *profile, gfp_t gfp,
struct common_audit_data *sa,
void (*cb) (struct audit_buffer *, void *))
{
BUG_ON(!profile);
if (type == AUDIT_APPARMOR_AUTO) {
if (likely(!sa->aad->error)) {
if (AUDIT_MODE(profile) != AUDIT_ALL)
return 0;
type = AUDIT_APPARMOR_AUDIT;
} else if (COMPLAIN_MODE(profile))
type = AUDIT_APPARMOR_ALLOWED;
else
type = AUDIT_APPARMOR_DENIED;
}
if (AUDIT_MODE(profile) == AUDIT_QUIET ||
(type == AUDIT_APPARMOR_DENIED &&
AUDIT_MODE(profile) == AUDIT_QUIET))
return sa->aad->error;
if (KILL_MODE(profile) && type == AUDIT_APPARMOR_DENIED)
type = AUDIT_APPARMOR_KILL;
if (!unconfined(profile))
sa->aad->profile = profile;
aa_audit_msg(type, sa, cb);
if (sa->aad->type == AUDIT_APPARMOR_KILL)
(void)send_sig_info(SIGKILL, NULL, sa->tsk ? sa->tsk : current);
if (sa->aad->type == AUDIT_APPARMOR_ALLOWED)
return complain_error(sa->aad->error);
return sa->aad->error;
}
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