Merge CodeIgniter 3 support

1 files changed, 393 insertions, 0 deletions

diff --git a/application/models/Muser.php b/application/models/Muser.php
new file mode 100644
index 000000000..e59572f82
--- /dev/null
+++ b/application/models/Muser.php
@@ -0,0 +1,393 @@
+<?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;
+	}
+
+}
+