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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Multiple plugin authentication Support library
*
* 2006-08-28 File created, AUTH return values defined.
*
* @package core
* @subpackage auth
* @copyright 1999 onwards Martin Dougiamas http://dougiamas.com
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Returned when the login was successful.
*/
define('AUTH_OK', 0);
/**
* Returned when the login was unsuccessful.
*/
define('AUTH_FAIL', 1);
/**
* Returned when the login was denied (a reason for AUTH_FAIL).
*/
define('AUTH_DENIED', 2);
/**
* Returned when some error occurred (a reason for AUTH_FAIL).
*/
define('AUTH_ERROR', 4);
/**
* Authentication - error codes for user confirm
*/
define('AUTH_CONFIRM_FAIL', 0);
define('AUTH_CONFIRM_OK', 1);
define('AUTH_CONFIRM_ALREADY', 2);
define('AUTH_CONFIRM_ERROR', 3);
# MDL-14055
define('AUTH_REMOVEUSER_KEEP', 0);
define('AUTH_REMOVEUSER_SUSPEND', 1);
define('AUTH_REMOVEUSER_FULLDELETE', 2);
/**
* Abstract authentication plugin.
*
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package moodlecore
*/
class auth_plugin_base {
/**
* The configuration details for the plugin.
* @var object
*/
var $config;
/**
* Authentication plugin type - the same as db field.
* @var string
*/
var $authtype;
/*
* The fields we can lock and update from/to external authentication backends
* @var array
*/
var $userfields = array(
'firstname',
'lastname',
'email',
'city',
'country',
'lang',
'description',
'url',
'idnumber',
'institution',
'department',
'phone1',
'phone2',
'address'
);
/**
* This is the primary method that is used by the authenticate_user_login()
* function in moodlelib.php.
*
* This method should return a boolean indicating
* whether or not the username and password authenticate successfully.
*
* Returns true if the username and password work and false if they are
* wrong or don't exist.
*
* @param string $username The username (with system magic quotes)
* @param string $password The password (with system magic quotes)
*
* @return bool Authentication success or failure.
*/
function user_login($username, $password) {
print_error('mustbeoveride', 'debug', '', 'user_login()' );
}
/**
* Returns true if this authentication plugin can change the users'
* password.
*
* @return bool
*/
function can_change_password() {
//override if needed
return false;
}
/**
* Returns the URL for changing the users' passwords, or empty if the default
* URL can be used.
*
* This method is used if can_change_password() returns true.
* This method is called only when user is logged in, it may use global $USER.
*
* @return moodle_url url of the profile page or null if standard used
*/
function change_password_url() {
//override if needed
return null;
}
/**
* Returns true if this authentication plugin can edit the users'
* profile.
*
* @return bool
*/
function can_edit_profile() {
//override if needed
return true;
}
/**
* Returns the URL for editing the users' profile, or empty if the default
* URL can be used.
*
* This method is used if can_edit_profile() returns true.
* This method is called only when user is logged in, it may use global $USER.
*
* @return moodle_url url of the profile page or null if standard used
*/
function edit_profile_url() {
//override if needed
return null;
}
/**
* Returns true if this authentication plugin is "internal".
*
* Internal plugins use password hashes from Moodle user table for authentication.
*
* @return bool
*/
function is_internal() {
//override if needed
return true;
}
/**
* Indicates if password hashes should be stored in local moodle database.
* @return bool true means md5 password hash stored in user table, false means flag 'not_cached' stored there instead
*/
function prevent_local_passwords() {
return !$this->is_internal();
}
/**
* Indicates if moodle should automatically update internal user
* records with data from external sources using the information
* from get_userinfo() method.
*
* @return bool true means automatically copy data from ext to user table
*/
function is_synchronised_with_external() {
return !$this->is_internal();
}
/**
* Updates the user's password.
*
* In previous versions of Moodle, the function
* auth_user_update_password accepted a username as the first parameter. The
* revised function expects a user object.
*
* @param object $user User table object
* @param string $newpassword Plaintext password
*
* @return bool True on success
*/
function user_update_password($user, $newpassword) {
//override if needed
return true;
}
/**
* Called when the user record is updated.
* Modifies user in external database. It takes olduser (before changes) and newuser (after changes)
* compares information saved modified information to external db.
*
* @param mixed $olduser Userobject before modifications (without system magic quotes)
* @param mixed $newuser Userobject new modified userobject (without system magic quotes)
* @return boolean true if updated or update ignored; false if error
*
*/
function user_update($olduser, $newuser) {
//override if needed
return true;
}
/**
* User delete requested - internal user record is mared as deleted already, username not present anymore.
*
* Do any action in external database.
*
* @param object $user Userobject before delete (without system magic quotes)
* @return void
*/
function user_delete($olduser) {
//override if needed
return;
}
/**
* Returns true if plugin allows resetting of internal password.
*
* @return bool
*/
function can_reset_password() {
//override if needed
return false;
}
/**
* Returns true if plugin allows resetting of internal password.
*
* @return bool
*/
function can_signup() {
//override if needed
return false;
}
/**
* Sign up a new user ready for confirmation.
* Password is passed in plaintext.
*
* @param object $user new user object
* @param boolean $notify print notice with link and terminate
*/
function user_signup($user, $notify=true) {
//override when can signup
print_error('mustbeoveride', 'debug', '', 'user_signup()' );
}
/**
* Return a form to capture user details for account creation.
* This is used in /login/signup.php.
* @return moodle_form A form which edits a record from the user table.
*/
function signup_form() {
global $CFG;
require_once($CFG->dirroot.'/login/signup_form.php');
return new login_signup_form(null, null, 'post', '', array('autocomplete'=>'on'));
}
/**
* Returns true if plugin allows confirming of new users.
*
* @return bool
*/
function can_confirm() {
//override if needed
return false;
}
/**
* Confirm the new user as registered.
*
* @param string $username
* @param string $confirmsecret
*/
function user_confirm($username, $confirmsecret) {
//override when can confirm
print_error('mustbeoveride', 'debug', '', 'user_confirm()' );
}
/**
* Checks if user exists in external db
*
* @param string $username (with system magic quotes)
* @return bool
*/
function user_exists($username) {
//override if needed
return false;
}
/**
* return number of days to user password expires
*
* If userpassword does not expire it should return 0. If password is already expired
* it should return negative value.
*
* @param mixed $username username (with system magic quotes)
* @return integer
*/
function password_expire($username) {
return 0;
}
/**
* Sync roles for this user - usually creator
*
* @param $user object user object (without system magic quotes)
*/
function sync_roles($user) {
//override if needed
}
/**
* Read user information from external database and returns it as array().
* Function should return all information available. If you are saving
* this information to moodle user-table you should honour synchronisation flags
*
* @param string $username username
*
* @return mixed array with no magic quotes or false on error
*/
function get_userinfo($username) {
//override if needed
return array();
}
/**
* Prints a form for configuring this authentication plugin.
*
* This function is called from admin/auth.php, and outputs a full page with
* a form for configuring this plugin.
*
* @param object $config
* @param object $err
* @param array $user_fields
*/
function config_form($config, $err, $user_fields) {
//override if needed
}
/**
* A chance to validate form data, and last chance to
* do stuff before it is inserted in config_plugin
* @param object object with submitted configuration settings (without system magic quotes)
* @param array $err array of error messages
*/
function validate_form($form, &$err) {
//override if needed
}
/**
* Processes and stores configuration data for this authentication plugin.
*
* @param object object with submitted configuration settings (without system magic quotes)
*/
function process_config($config) {
//override if needed
return true;
}
/**
* Hook for overriding behaviour of login page.
* This method is called from login/index.php page for all enabled auth plugins.
*
* @global object
* @global object
*/
function loginpage_hook() {
global $frm; // can be used to override submitted login form
global $user; // can be used to replace authenticate_user_login()
//override if needed
}
/**
* Post authentication hook.
* This method is called from authenticate_user_login() for all enabled auth plugins.
*
* @param object $user user object, later used for $USER
* @param string $username (with system magic quotes)
* @param string $password plain text password (with system magic quotes)
*/
function user_authenticated_hook(&$user, $username, $password) {
//override if needed
}
/**
* Pre logout hook.
* This method is called from require_logout() for all enabled auth plugins,
*
* @global object
*/
function prelogout_hook() {
global $USER; // use $USER->auth to find the plugin used for login
//override if needed
}
/**
* Hook for overriding behaviour of logout page.
* This method is called from login/logout.php page for all enabled auth plugins.
*
* @global object
* @global string
*/
function logoutpage_hook() {
global $USER; // use $USER->auth to find the plugin used for login
global $redirect; // can be used to override redirect after logout
//override if needed
}
/**
* Hook called before timing out of database session.
* This is useful for SSO and MNET.
*
* @param object $user
* @param string $sid session id
* @param int $timecreated start of session
* @param int $timemodified user last seen
* @return bool true means do not timeout session yet
*/
function ignore_timeout_hook($user, $sid, $timecreated, $timemodified) {
return false;
}
/**
* Return the properly translated human-friendly title of this auth plugin
*
* @todo Document this function
*/
function get_title() {
return get_string('pluginname', "auth_{$this->authtype}");
}
/**
* Get the auth description (from core or own auth lang files)
*
* @return string The description
*/
function get_description() {
$authdescription = get_string("auth_{$this->authtype}description", "auth_{$this->authtype}");
return $authdescription;
}
/**
* Returns whether or not the captcha element is enabled, and the admin settings fulfil its requirements.
*
* @abstract Implement in child classes
* @return bool
*/
function is_captcha_enabled() {
return false;
}
/**
* Returns a list of potential IdPs that this authentication plugin supports.
* This is used to provide links on the login page.
*
* @param string $wantsurl the relative url fragment the user wants to get to. You can use this to compose a returnurl, for example
*
* @return array like:
* array(
* array(
* 'url' => 'http://someurl',
* 'icon' => new pix_icon(...),
* 'name' => get_string('somename', 'auth_yourplugin'),
* ),
* )
*/
function loginpage_idp_list($wantsurl) {
return array();
}
}
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