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641 lines
24 KiB
641 lines
24 KiB
2 years ago
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Anobody can login with any password.
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*
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* @package auth_oauth2
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* @copyright 2017 Damyon Wiese
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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*/
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namespace auth_oauth2;
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defined('MOODLE_INTERNAL') || die();
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use pix_icon;
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use moodle_url;
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use core_text;
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use context_system;
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use stdClass;
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use core\oauth2\issuer;
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use core\oauth2\client;
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require_once($CFG->libdir.'/authlib.php');
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require_once($CFG->dirroot.'/user/lib.php');
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/**
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* Plugin for oauth2 authentication.
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*
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* @package auth_oauth2
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* @copyright 2017 Damyon Wiese
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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*/
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class auth extends \auth_plugin_base {
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/**
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* @var stdClass $userinfo The set of user info returned from the oauth handshake
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*/
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private static $userinfo;
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/**
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* @var stdClass $userpicture The url to a picture.
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*/
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private static $userpicture;
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/**
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* Constructor.
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*/
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public function __construct() {
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$this->authtype = 'oauth2';
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$this->config = get_config('auth_oauth2');
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}
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/**
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* Returns true if the username and password work or don't exist and false
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* if the user exists and the password is wrong.
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*
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* @param string $username The username
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* @param string $password The password
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* @return bool Authentication success or failure.
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*/
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public function user_login($username, $password) {
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$cached = $this->get_static_user_info();
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if (empty($cached)) {
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// This means we were called as part of a normal login flow - without using oauth.
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return false;
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}
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$verifyusername = $cached['username'];
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if ($verifyusername == $username) {
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return true;
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}
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return false;
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}
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/**
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* We don't want to allow users setting an internal password.
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*
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* @return bool
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*/
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public function prevent_local_passwords() {
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return true;
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}
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/**
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* Returns true if this authentication plugin is 'internal'.
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*
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* @return bool
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*/
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public function is_internal() {
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return false;
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}
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/**
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* Indicates if moodle should automatically update internal user
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* records with data from external sources using the information
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* from auth_plugin_base::get_userinfo().
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*
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* @return bool true means automatically copy data from ext to user table
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*/
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public function is_synchronised_with_external() {
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return true;
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}
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/**
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* Returns true if this authentication plugin can change the user's
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* password.
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*
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* @return bool
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*/
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public function can_change_password() {
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return false;
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}
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/**
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* Returns the URL for changing the user's pw, or empty if the default can
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* be used.
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*
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* @return moodle_url
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*/
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public function change_password_url() {
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return null;
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}
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/**
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* Returns true if plugin allows resetting of internal password.
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*
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* @return bool
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*/
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public function can_reset_password() {
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return false;
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}
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/**
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* Returns true if plugin can be manually set.
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*
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* @return bool
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*/
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public function can_be_manually_set() {
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return true;
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}
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/**
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* Return the userinfo from the oauth handshake. Will only be valid
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* for the logged in user.
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* @param string $username
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*/
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public function get_userinfo($username) {
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$cached = $this->get_static_user_info();
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if (!empty($cached) && $cached['username'] == $username) {
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return $cached;
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}
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return false;
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}
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/**
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* Do some checks on the identity provider before showing it on the login page.
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* @param core\oauth2\issuer $issuer
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* @return boolean
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*/
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private function is_ready_for_login_page(\core\oauth2\issuer $issuer) {
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return $issuer->get('enabled') &&
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$issuer->is_configured() &&
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!empty($issuer->get('showonloginpage'));
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}
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/**
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* Return a list of identity providers to display on the login page.
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*
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* @param string|moodle_url $wantsurl The requested URL.
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* @return array List of arrays with keys url, iconurl and name.
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*/
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public function loginpage_idp_list($wantsurl) {
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$providers = \core\oauth2\api::get_all_issuers();
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$result = [];
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if (empty($wantsurl)) {
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$wantsurl = '/';
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}
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foreach ($providers as $idp) {
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if ($this->is_ready_for_login_page($idp)) {
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$params = ['id' => $idp->get('id'), 'wantsurl' => $wantsurl, 'sesskey' => sesskey()];
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$url = new moodle_url('/auth/oauth2/login.php', $params);
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$icon = $idp->get('image');
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$result[] = ['url' => $url, 'iconurl' => $icon, 'name' => $idp->get('name')];
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}
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}
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return $result;
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}
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/**
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* Statically cache the user info from the oauth handshake
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* @param stdClass $userinfo
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*/
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private function set_static_user_info($userinfo) {
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self::$userinfo = $userinfo;
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}
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/**
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* Get the static cached user info
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* @return stdClass
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*/
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private function get_static_user_info() {
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return self::$userinfo;
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}
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/**
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* Statically cache the user picture from the oauth handshake
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* @param string $userpicture
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*/
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private function set_static_user_picture($userpicture) {
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self::$userpicture = $userpicture;
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}
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/**
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* Get the static cached user picture
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* @return string
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*/
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private function get_static_user_picture() {
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return self::$userpicture;
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}
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/**
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* If this user has no picture - but we got one from oauth - set it.
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* @param stdClass $user
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* @return boolean True if the image was updated.
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*/
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private function update_picture($user) {
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global $CFG, $DB, $USER;
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require_once($CFG->libdir . '/filelib.php');
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require_once($CFG->libdir . '/gdlib.php');
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require_once($CFG->dirroot . '/user/lib.php');
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$fs = get_file_storage();
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$userid = $user->id;
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if (!empty($user->picture)) {
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return false;
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}
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if (!empty($CFG->enablegravatar)) {
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return false;
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}
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$picture = $this->get_static_user_picture();
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if (empty($picture)) {
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return false;
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}
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$context = \context_user::instance($userid, MUST_EXIST);
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$fs->delete_area_files($context->id, 'user', 'newicon');
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$filerecord = array(
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'contextid' => $context->id,
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'component' => 'user',
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'filearea' => 'newicon',
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'itemid' => 0,
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'filepath' => '/',
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'filename' => 'image'
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);
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try {
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$fs->create_file_from_string($filerecord, $picture);
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} catch (\file_exception $e) {
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return get_string($e->errorcode, $e->module, $e->a);
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}
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$iconfile = $fs->get_area_files($context->id, 'user', 'newicon', false, 'itemid', false);
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// There should only be one.
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$iconfile = reset($iconfile);
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// Something went wrong while creating temp file - remove the uploaded file.
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if (!$iconfile = $iconfile->copy_content_to_temp()) {
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$fs->delete_area_files($context->id, 'user', 'newicon');
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return false;
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}
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// Copy file to temporary location and the send it for processing icon.
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$newpicture = (int) process_new_icon($context, 'user', 'icon', 0, $iconfile);
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// Delete temporary file.
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@unlink($iconfile);
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// Remove uploaded file.
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$fs->delete_area_files($context->id, 'user', 'newicon');
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// Set the user's picture.
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$updateuser = new stdClass();
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$updateuser->id = $userid;
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$updateuser->picture = $newpicture;
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$USER->picture = $newpicture;
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user_update_user($updateuser);
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return true;
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}
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/**
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* Update user data according to data sent by authorization server.
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*
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* @param array $externaldata data from authorization server
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* @param stdClass $userdata Current data of the user to be updated
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* @return stdClass The updated user record, or the existing one if there's nothing to be updated.
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*/
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private function update_user(array $externaldata, $userdata) {
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$user = (object) [
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'id' => $userdata->id,
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];
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// We can only update if the default authentication type of the user is set to OAuth2 as well. Otherwise, we might mess
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// up the user data of other users that use different authentication mechanisms (e.g. linked logins).
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if ($userdata->auth !== $this->authtype) {
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return $userdata;
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}
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// Go through each field from the external data.
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foreach ($externaldata as $fieldname => $value) {
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if (!in_array($fieldname, $this->userfields)) {
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// Skip if this field doesn't belong to the list of fields that can be synced with the OAuth2 issuer.
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continue;
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}
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if (!property_exists($userdata, $fieldname)) {
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// Just in case this field is on the list, but not part of the user data. This shouldn't happen though.
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continue;
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}
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// Get the old value.
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$oldvalue = (string)$userdata->$fieldname;
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// Get the lock configuration of the field.
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$lockvalue = $this->config->{'field_lock_' . $fieldname};
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// We should update fields that meet the following criteria:
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// - Lock value set to 'unlocked'; or 'unlockedifempty', given the current value is empty.
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// - The value has changed.
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if ($lockvalue === 'unlocked' || ($lockvalue === 'unlockedifempty' && empty($oldvalue))) {
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$value = (string)$value;
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if ($oldvalue !== $value) {
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$user->$fieldname = $value;
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}
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}
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}
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// Update the user data.
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user_update_user($user, false);
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// Save user profile data.
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profile_save_data($user);
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// Refresh user for $USER variable.
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return get_complete_user_data('id', $user->id);
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}
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/**
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* Confirm the new user as registered.
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*
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* @param string $username
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* @param string $confirmsecret
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*/
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public function user_confirm($username, $confirmsecret) {
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global $DB;
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$user = get_complete_user_data('username', $username);
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if (!empty($user)) {
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if ($user->auth != $this->authtype) {
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return AUTH_CONFIRM_ERROR;
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} else if ($user->secret == $confirmsecret && $user->confirmed) {
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return AUTH_CONFIRM_ALREADY;
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} else if ($user->secret == $confirmsecret) { // They have provided the secret key to get in.
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$DB->set_field("user", "confirmed", 1, array("id" => $user->id));
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return AUTH_CONFIRM_OK;
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}
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} else {
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return AUTH_CONFIRM_ERROR;
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}
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}
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/**
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* Print a page showing that a confirm email was sent with instructions.
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*
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* @param string $title
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* @param string $message
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*/
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public function print_confirm_required($title, $message) {
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global $PAGE, $OUTPUT, $CFG;
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||
|
|
|
||
|
|
$PAGE->navbar->add($title);
|
||
|
|
$PAGE->set_title($title);
|
||
|
|
$PAGE->set_heading($PAGE->course->fullname);
|
||
|
|
echo $OUTPUT->header();
|
||
|
|
notice($message, "$CFG->wwwroot/index.php");
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Complete the login process after oauth handshake is complete.
|
||
|
|
* @param \core\oauth2\client $client
|
||
|
|
* @param string $redirecturl
|
||
|
|
* @return void Either redirects or throws an exception
|
||
|
|
*/
|
||
|
|
public function complete_login(client $client, $redirecturl) {
|
||
|
|
global $CFG, $SESSION, $PAGE;
|
||
|
|
|
||
|
|
$userinfo = $client->get_userinfo();
|
||
|
|
|
||
|
|
if (!$userinfo) {
|
||
|
|
// Trigger login failed event.
|
||
|
|
$failurereason = AUTH_LOGIN_NOUSER;
|
||
|
|
$event = \core\event\user_login_failed::create(['other' => ['username' => 'unknown',
|
||
|
|
'reason' => $failurereason]]);
|
||
|
|
$event->trigger();
|
||
|
|
|
||
|
|
$errormsg = get_string('loginerror_nouserinfo', 'auth_oauth2');
|
||
|
|
$SESSION->loginerrormsg = $errormsg;
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
}
|
||
|
|
if (empty($userinfo['username']) || empty($userinfo['email'])) {
|
||
|
|
// Trigger login failed event.
|
||
|
|
$failurereason = AUTH_LOGIN_NOUSER;
|
||
|
|
$event = \core\event\user_login_failed::create(['other' => ['username' => 'unknown',
|
||
|
|
'reason' => $failurereason]]);
|
||
|
|
$event->trigger();
|
||
|
|
|
||
|
|
$errormsg = get_string('loginerror_userincomplete', 'auth_oauth2');
|
||
|
|
$SESSION->loginerrormsg = $errormsg;
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
}
|
||
|
|
|
||
|
|
$userinfo['username'] = trim(core_text::strtolower($userinfo['username']));
|
||
|
|
$oauthemail = $userinfo['email'];
|
||
|
|
|
||
|
|
// Once we get here we have the user info from oauth.
|
||
|
|
$userwasmapped = false;
|
||
|
|
|
||
|
|
// Clean and remember the picture / lang.
|
||
|
|
if (!empty($userinfo['picture'])) {
|
||
|
|
$this->set_static_user_picture($userinfo['picture']);
|
||
|
|
unset($userinfo['picture']);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!empty($userinfo['lang'])) {
|
||
|
|
$userinfo['lang'] = str_replace('-', '_', trim(core_text::strtolower($userinfo['lang'])));
|
||
|
|
if (!get_string_manager()->translation_exists($userinfo['lang'], false)) {
|
||
|
|
unset($userinfo['lang']);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// First we try and find a defined mapping.
|
||
|
|
$linkedlogin = api::match_username_to_user($userinfo['username'], $client->get_issuer());
|
||
|
|
|
||
|
|
if (!empty($linkedlogin) && empty($linkedlogin->get('confirmtoken'))) {
|
||
|
|
$mappeduser = get_complete_user_data('id', $linkedlogin->get('userid'));
|
||
|
|
|
||
|
|
if ($mappeduser && $mappeduser->suspended) {
|
||
|
|
$failurereason = AUTH_LOGIN_SUSPENDED;
|
||
|
|
$event = \core\event\user_login_failed::create([
|
||
|
|
'userid' => $mappeduser->id,
|
||
|
|
'other' => [
|
||
|
|
'username' => $userinfo['username'],
|
||
|
|
'reason' => $failurereason
|
||
|
|
]
|
||
|
|
]);
|
||
|
|
$event->trigger();
|
||
|
|
$SESSION->loginerrormsg = get_string('invalidlogin');
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
} else if ($mappeduser && $mappeduser->confirmed) {
|
||
|
|
// Update user fields.
|
||
|
|
$userinfo = $this->update_user($userinfo, $mappeduser);
|
||
|
|
$userwasmapped = true;
|
||
|
|
} else {
|
||
|
|
// Trigger login failed event.
|
||
|
|
$failurereason = AUTH_LOGIN_UNAUTHORISED;
|
||
|
|
$event = \core\event\user_login_failed::create(['other' => ['username' => $userinfo['username'],
|
||
|
|
'reason' => $failurereason]]);
|
||
|
|
$event->trigger();
|
||
|
|
|
||
|
|
$errormsg = get_string('confirmationpending', 'auth_oauth2');
|
||
|
|
$SESSION->loginerrormsg = $errormsg;
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
}
|
||
|
|
} else if (!empty($linkedlogin)) {
|
||
|
|
// Trigger login failed event.
|
||
|
|
$failurereason = AUTH_LOGIN_UNAUTHORISED;
|
||
|
|
$event = \core\event\user_login_failed::create(['other' => ['username' => $userinfo['username'],
|
||
|
|
'reason' => $failurereason]]);
|
||
|
|
$event->trigger();
|
||
|
|
|
||
|
|
$errormsg = get_string('confirmationpending', 'auth_oauth2');
|
||
|
|
$SESSION->loginerrormsg = $errormsg;
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
}
|
||
|
|
|
||
|
|
$issuer = $client->get_issuer();
|
||
|
|
if (!$issuer->is_valid_login_domain($oauthemail)) {
|
||
|
|
// Trigger login failed event.
|
||
|
|
$failurereason = AUTH_LOGIN_UNAUTHORISED;
|
||
|
|
$event = \core\event\user_login_failed::create(['other' => ['username' => $userinfo['username'],
|
||
|
|
'reason' => $failurereason]]);
|
||
|
|
$event->trigger();
|
||
|
|
|
||
|
|
$errormsg = get_string('notloggedindebug', 'auth_oauth2', get_string('loginerror_invaliddomain', 'auth_oauth2'));
|
||
|
|
$SESSION->loginerrormsg = $errormsg;
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!$userwasmapped) {
|
||
|
|
// No defined mapping - we need to see if there is an existing account with the same email.
|
||
|
|
|
||
|
|
$moodleuser = \core_user::get_user_by_email($userinfo['email']);
|
||
|
|
if (!empty($moodleuser)) {
|
||
|
|
if ($issuer->get('requireconfirmation')) {
|
||
|
|
$PAGE->set_url('/auth/oauth2/confirm-link-login.php');
|
||
|
|
$PAGE->set_context(context_system::instance());
|
||
|
|
|
||
|
|
\auth_oauth2\api::send_confirm_link_login_email($userinfo, $issuer, $moodleuser->id);
|
||
|
|
// Request to link to existing account.
|
||
|
|
$emailconfirm = get_string('emailconfirmlink', 'auth_oauth2');
|
||
|
|
$message = get_string('emailconfirmlinksent', 'auth_oauth2', $moodleuser->email);
|
||
|
|
$this->print_confirm_required($emailconfirm, $message);
|
||
|
|
exit();
|
||
|
|
} else {
|
||
|
|
\auth_oauth2\api::link_login($userinfo, $issuer, $moodleuser->id, true);
|
||
|
|
$userinfo = $this->update_user($userinfo, $moodleuser);
|
||
|
|
// No redirect, we will complete this login.
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
// This is a new account.
|
||
|
|
$exists = \core_user::get_user_by_username($userinfo['username']);
|
||
|
|
// Creating a new user?
|
||
|
|
if ($exists) {
|
||
|
|
// Trigger login failed event.
|
||
|
|
$failurereason = AUTH_LOGIN_FAILED;
|
||
|
|
$event = \core\event\user_login_failed::create(['other' => ['username' => $userinfo['username'],
|
||
|
|
'reason' => $failurereason]]);
|
||
|
|
$event->trigger();
|
||
|
|
|
||
|
|
// The username exists but the emails don't match. Refuse to continue.
|
||
|
|
$errormsg = get_string('accountexists', 'auth_oauth2');
|
||
|
|
$SESSION->loginerrormsg = $errormsg;
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (email_is_not_allowed($userinfo['email'])) {
|
||
|
|
// Trigger login failed event.
|
||
|
|
$failurereason = AUTH_LOGIN_FAILED;
|
||
|
|
$event = \core\event\user_login_failed::create(['other' => ['username' => $userinfo['username'],
|
||
|
|
'reason' => $failurereason]]);
|
||
|
|
$event->trigger();
|
||
|
|
// The username exists but the emails don't match. Refuse to continue.
|
||
|
|
$reason = get_string('loginerror_invaliddomain', 'auth_oauth2');
|
||
|
|
$errormsg = get_string('notloggedindebug', 'auth_oauth2', $reason);
|
||
|
|
$SESSION->loginerrormsg = $errormsg;
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!empty($CFG->authpreventaccountcreation)) {
|
||
|
|
// Trigger login failed event.
|
||
|
|
$failurereason = AUTH_LOGIN_UNAUTHORISED;
|
||
|
|
$event = \core\event\user_login_failed::create(['other' => ['username' => $userinfo['username'],
|
||
|
|
'reason' => $failurereason]]);
|
||
|
|
$event->trigger();
|
||
|
|
// The username does not exist and settings prevent creating new accounts.
|
||
|
|
$reason = get_string('loginerror_cannotcreateaccounts', 'auth_oauth2');
|
||
|
|
$errormsg = get_string('notloggedindebug', 'auth_oauth2', $reason);
|
||
|
|
$SESSION->loginerrormsg = $errormsg;
|
||
|
|
$client->log_out();
|
||
|
|
redirect(new moodle_url('/login/index.php'));
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($issuer->get('requireconfirmation')) {
|
||
|
|
$PAGE->set_url('/auth/oauth2/confirm-account.php');
|
||
|
|
$PAGE->set_context(context_system::instance());
|
||
|
|
|
||
|
|
// Create a new (unconfirmed account) and send an email to confirm it.
|
||
|
|
$user = \auth_oauth2\api::send_confirm_account_email($userinfo, $issuer);
|
||
|
|
|
||
|
|
$this->update_picture($user);
|
||
|
|
$emailconfirm = get_string('emailconfirm');
|
||
|
|
$message = get_string('emailconfirmsent', '', $userinfo['email']);
|
||
|
|
$this->print_confirm_required($emailconfirm, $message);
|
||
|
|
exit();
|
||
|
|
} else {
|
||
|
|
// Create a new confirmed account.
|
||
|
|
$newuser = \auth_oauth2\api::create_new_confirmed_account($userinfo, $issuer);
|
||
|
|
$userinfo = get_complete_user_data('id', $newuser->id);
|
||
|
|
// No redirect, we will complete this login.
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// We used to call authenticate_user - but that won't work if the current user has a different default authentication
|
||
|
|
// method. Since we now ALWAYS link a login - if we get to here we can directly allow the user in.
|
||
|
|
$user = (object) $userinfo;
|
||
|
|
complete_user_login($user);
|
||
|
|
$this->update_picture($user);
|
||
|
|
redirect($redirecturl);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns information on how the specified user can change their password.
|
||
|
|
* The password of the oauth2 accounts is not stored in Moodle.
|
||
|
|
*
|
||
|
|
* @param stdClass $user A user object
|
||
|
|
* @return string[] An array of strings with keys subject and message
|
||
|
|
*/
|
||
|
|
public function get_password_change_info(stdClass $user) : array {
|
||
|
|
$site = get_site();
|
||
|
|
|
||
|
|
$data = new stdClass();
|
||
|
|
$data->firstname = $user->firstname;
|
||
|
|
$data->lastname = $user->lastname;
|
||
|
|
$data->username = $user->username;
|
||
|
|
$data->sitename = format_string($site->fullname);
|
||
|
|
$data->admin = generate_email_signoff();
|
||
|
|
|
||
|
|
$message = get_string('emailpasswordchangeinfo', 'auth_oauth2', $data);
|
||
|
|
$subject = get_string('emailpasswordchangeinfosubject', 'auth_oauth2', format_string($site->fullname));
|
||
|
|
|
||
|
|
return [
|
||
|
|
'subject' => $subject,
|
||
|
|
'message' => $message
|
||
|
|
];
|
||
|
|
}
|
||
|
|
}
|