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<?php
/*
* Copyright 2012-2013 Florian "Bluewind" Pritz <bluewind@server-speed.net>
*
* Licensed under AGPLv3
* (see COPYING for full license text)
*
*/
class Muser extends CI_Model {
private $default_upload_id_limits = "3-6";
// last level has the most access
private $access_levels = array("basic", "apikey", "full");
private $hashalgo;
private $hashoptions = array();
function __construct()
{
parent::__construct();
$this->load->helper("filebin");
$this->load->driver("duser");
$this->hashalgo = $this->config->item('auth_db')['hashing_algorithm'];
$this->hashoptions = $this->config->item('auth_db')['hashing_options'];
}
function has_session()
{
// checking $this doesn't work
$CI =& get_instance();
if (property_exists($CI, "session")) {
return true;
}
// Only load the session class if we already have a cookie that might need to be renewed.
// Otherwise we just create lots of stale sessions.
if (isset($_COOKIE[$this->config->item("sess_cookie_name")])) {
$this->load->library("session");
return true;
}
return false;
}
function require_session()
{
if (!$this->has_session()) {
$this->load->library("session");
}
}
function logged_in()
{
if ($this->has_session()) {
return $this->session->userdata('logged_in') == true;
}
return false;
}
function login($username, $password)
{
$this->require_session();
return $this->duser->login($username, $password);
}
private function login_cli_client()
{
$username = $this->input->post("username");
$password = $this->input->post("password");
// prefer post parameters if either (username or password) is set
if ($username === false && $password === false) {
if (isset($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW'])) {
$username = $_SERVER['PHP_AUTH_USER'];
$password = $_SERVER['PHP_AUTH_PW'];
}
}
if ($username !== false && $password !== false) {
if ($this->login($username, $password)) {
return true;
} else {
throw new \exceptions\NotAuthenticatedException("user/login-failed", "Login failed");
}
}
return null;
}
function apilogin($apikey)
{
$this->require_session();
// get rid of spaces and newlines
$apikey = trim($apikey);
$query = $this->db->select('user, access_level')
->from('apikeys')
->where('key', $apikey)
->get()->row_array();
if (isset($query["user"])) {
$this->session->set_userdata(array(
'logged_in' => true,
'username' => '',
'userid' => $query["user"],
'access_level' => $query["access_level"],
));
return true;
}
throw new \exceptions\NotAuthenticatedException("user/api-login-failed", "API key login failed");
}
function logout()
{
$this->require_session();
$this->session->unset_userdata('logged_in');
$this->session->unset_userdata('username');
$this->session->unset_userdata('userid');
$this->session->sess_destroy();
}
function get_username()
{
if (!$this->logged_in()) {
return "";
}
return $this->session->userdata('username');
}
/*
* Check if a given username is valid.
*
* Valid usernames contain only lowercase characters and numbers. They are
* also <= 32 characters in length.
*
* @return boolean
*/
public function valid_username($username)
{
return strlen($username) <= 32 && preg_match("/^[a-z0-9]+$/", $username);
}
/**
* Check if a given email is valid. Only perform minimal checking since
* verifying emails is very very difficuly.
*
* @return boolean
*/
public function valid_email($email)
{
$this->load->helper("email");
return valid_email($email);
}
public function add_user($username, $password, $email, $referrer)
{
if (!$this->valid_username($username)) {
throw new \exceptions\PublicApiException("user/invalid-username", "Invalid username (only up to 32 chars of a-z0-9 are allowed)");
} else {
if ($this->muser->username_exists($username)) {
throw new \exceptions\PublicApiException("user/username-already-exists", "Username already exists");
}
}
if (!$this->valid_email($email)) {
throw new \exceptions\PublicApiException("user/invalid-email", "Invalid email");
}
$this->db->set(array(
'username' => $username,
'password' => $this->hash_password($password),
'email' => $email,
'referrer' => $referrer
))
->insert('users');
}
/**
* Delete a user.
*
* @param username
* @param password
* @return true on sucess, false otherwise
*/
public function delete_user($username, $password)
{
$this->duser->require_implemented("can_delete_account");
if ($this->duser->test_login_credentials($username, $password)) {
$userid = $this->get_userid_by_name($username);
assert($userid !== null);
$this->db->delete('profiles', array('user' => $userid));
$this->load->model("mfile");
$this->load->model("mmultipaste");
$this->mfile->delete_by_user($userid);
$this->mmultipaste->delete_by_user($userid);
# null out user data to keep referer information traceable
# If referer information was relinked, one user could create many
# accounts, delete the account that was used to invite them and
# then cause trouble so that the account that invited him gets
# banned because the admin thinks that account invited abusers
$this->db->set(array(
'username' => null,
'password' => null,
'email' => null,
))
->where(array('username' => $username))
->update('users');
return true;
}
return false;
}
function get_userid()
{
if (!$this->logged_in()) {
return 0;
}
return $this->session->userdata("userid");
}
public function get_userid_by_name($username)
{
$query = $this->db->select('id')
->from('users')
->where('username', $username)
->get()->row_array();
if ($query) {
return $query['id'];
}
return null;
}
function get_email($userid)
{
return $this->duser->get_email($userid);
}
public function get_access_levels()
{
return $this->access_levels;
}
private function check_access_level($wanted_level)
{
$session_level = $this->session->userdata("access_level");
$wanted = array_search($wanted_level, $this->get_access_levels());
$have = array_search($session_level, $this->get_access_levels());
if ($wanted === false || $have === false) {
throw new \exceptions\PublicApiException("api/invalid-accesslevel", "Failed to determine access level");
}
if ($have >= $wanted) {
return;
}
throw new \exceptions\InsufficientPermissionsException("api/insufficient-permissions", "Access denied: Access level too low. Required: $wanted_level; Have: $session_level");
}
function require_access($wanted_level = "full")
{
if ($this->input->post("apikey") !== false) {
$this->apilogin($this->input->post("apikey"));
}
if (is_cli_client()) {
$this->login_cli_client();
}
if ($this->logged_in()) {
return $this->check_access_level($wanted_level);
}
throw new \exceptions\NotAuthenticatedException("api/not-authenticated", "Not authenticated. FileBin requires you to have an account, please go to the homepage at ".site_url()." for more information.");
}
function username_exists($username)
{
return $this->duser->username_exists($username);
}
function get_action($action, $key)
{
$query = $this->db->from('actions')
->where('key', $key)
->where('action', $action)
->get()->row_array();
if (!isset($query["key"]) || $key != $query["key"]) {
throw new \exceptions\UserInputException("user/get_action/invalid-action", "Invalid action key. Has the key been used already?");
}
return $query;
}
public function get_profile_data()
{
$userid = $this->get_userid();
$fields = array(
"user" => $userid,
"upload_id_limits" => $this->default_upload_id_limits,
);
$query = $this->db->select(implode(', ', array_keys($fields)))
->from('profiles')
->where('user', $userid)
->get()->row_array();
$extra_fields = array(
"username" => $this->get_username(),
"email" => $this->get_email($userid),
);
return array_merge($fields, $query, $extra_fields);
}
public function update_profile($data)
{
assert(is_array($data));
$data["user"] = $this->get_userid();
$exists_in_db = $this->db->get_where("profiles", array("user" => $data["user"]))->num_rows() > 0;
if ($exists_in_db) {
$this->db->where("user", $data["user"]);
$this->db->update("profiles", $data);
} else {
$this->db->insert("profiles", $data);
}
}
public function set_password($userid, $password) {
$this->db->where('id', $userid)
->update('users', array(
'password' => $this->hash_password($password)
));
}
public function rehash_password($userid, $password, $hash) {
if (password_needs_rehash($hash, $this->hashalgo, $this->hashoptions)) {
$this->set_password($userid, $password);
}
}
public function get_upload_id_limits()
{
$userid = $this->get_userid();
$query = $this->db->select('upload_id_limits')
->from('profiles')
->where('user', $userid)
->get()->row_array();
if (empty($query)) {
return explode("-", $this->default_upload_id_limits);
}
return explode("-", $query["upload_id_limits"]);
}
function hash_password($password)
{
$hash = password_hash($password, $this->hashalgo, $this->hashoptions);
if ($hash === false) {
throw new \exceptions\ApiException('user/hash_password/failed', "Failed to hash password");
}
return $hash;
}
}
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