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<?php
/*
* Copyright 2009-2013 Florian "Bluewind" Pritz <bluewind@server-speed.net>
*
* Licensed under AGPLv3
* (see COPYING for full license text)
*
*/
class MY_Controller extends CI_Controller {
public $data = array();
public $var;
function __construct()
{
parent::__construct();
$this->var = new StdClass();
$this->load->library('customautoloader');
// check if DB is up to date
if (!(is_cli() && $this->uri->segment(1) === "tools")) {
$this->_ensure_database_schema_up_to_date();
}
$old_path = getenv("PATH");
putenv("PATH=$old_path:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin");
$this->load->helper(array('form', 'filebin'));
if ($this->uri->segment(1) == "api") {
is_api_client(true);
}
if ($this->_check_csrf_protection_required()) {
$this->_setup_csrf_protection();
}
if ($this->config->item("environment") == "development") {
$this->output->enable_profiler(true);
}
$this->data['title'] = "FileBin";
$this->load->model("muser");
$this->data["user_logged_in"] = $this->muser->logged_in();
$this->data['redirect_uri'] = $this->uri->uri_string();
if ($this->muser->has_session()) {
$this->data['show_multipaste_queue'] = !empty((new \service\multipaste_queue)->get());
}
}
protected function _require_cli_request()
{
if (!is_cli()) {
throw new \exceptions\InsufficientPermissionsException("api/cli-only", "This function can only be accessed via the CLI interface");
}
}
private function _ensure_database_schema_up_to_date()
{
if (!$this->db->table_exists('migrations')){
throw new \exceptions\PublicApiException("general/db/not-initialized", "Database not initialized. Can't find migrations table. Please run the migration script. (php index.php tools update_database)");
} else {
$this->config->load("migration", true);
$target_version = $this->config->item("migration_version", "migration");
// TODO: wait 20 seconds for an update so requests don't get lost for short updates?
$row = $this->db->get('migrations')->row();
$current_version = $row ? $row->version : 0;
if ($current_version != $target_version) {
throw new \exceptions\PublicApiException("general/db/wrong-version", "Database version is $current_version, we want $target_version. Please run the migration script. (php index.php tools update_database)");
}
}
}
private function _check_csrf_protection_required()
{
if ($this->input->post("apikey") !== null || is_api_client()) {
/* This relies on the authentication code always verifying the supplied
* apikey. If the key is not verified/logged in an attacker could simply
* add an empty "apikey" field to the CSRF form to circumvent the
* protection. If we always log in if a key is supplied we can ensure
* that an attacker (and the victim since they get a cookie) can only
* access the attacker's account.
*/
// TODO: perform the apikey login here to make sure this works as expected?
return false;
}
$uri_start = $this->uri->rsegment(1)."/".$this->uri->rsegment(2);
$csrf_whitelisted_handlers = array(
"always" => array(
/* Whitelist the upload pages because they don't cause harm and a user
* might keep the upload page open for more than csrf_expire seconds
* and we don't want to annoy them when they upload a big file and the
* CSRF check fails.
*/
"file/do_websubmit",
),
);
if (in_array($uri_start, $csrf_whitelisted_handlers["always"])) {
return false;
}
if (is_cli()) {
return false;
}
return true;
}
private function _setup_csrf_protection()
{
// 2 functions for accessing config options, really?
$this->config->set_item('csrf_protection', true);
config_item("csrf_protection", true);
if ($this->uri->uri_string() == "file/multipaste/ajax_submit") {
$this->config->set_item('csrf_regenerate', false);
}
$this->security->__construct('UTF-8');
$this->security->csrf_verify();
}
}
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