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-rw-r--r--application/models/Muser.php393
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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_api_client()
+ {
+ $username = $this->input->post("username");
+ $password = $this->input->post("password");
+
+ // TODO keep for now. might be useful if adapted to apikeys instead of passwords
+ // prefer post parameters if either (username or password) is set
+ //if ($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)
+ {
+ return $email === filter_var($email, FILTER_VALIDATE_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") !== null) {
+ $this->apilogin($this->input->post("apikey"));
+ }
+
+ //if (is_api_client()) {
+ //$this->login_api_client();
+ //}
+
+ if ($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', $userid)
+ ->get()->row_array();
+
+ if ($query === null) {
+ $query = [];
+ }
+
+ $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;
+ }
+
+}
+