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Developer Documentation
See Release Notes
Long Term Support Release
- Bug fixes for general core bugs in 4.1.x will end 13 November 2023 (12 months).
- Bug fixes for security issues in 4.1.x will end 10 November 2025 (36 months).
- PHP version: minimum PHP 7.4.0 Note: minimum PHP version has increased since Moodle 4.0. PHP 8.0.x is supported too.
/lib/ -> authlib.php (source)
Differences Between: [Versions 310 and 401] [Versions 311 and 401] [Versions 39 and 401] [Versions 400 and 401] [Versions 401 and 402] [Versions 401 and 403]
1 <?php 2 3 // This file is part of Moodle - http://moodle.org/ 4 // 5 // Moodle is free software: you can redistribute it and/or modify 6 // it under the terms of the GNU General Public License as published by 7 // the Free Software Foundation, either version 3 of the License, or 8 // (at your option) any later version. 9 // 10 // Moodle is distributed in the hope that it will be useful, 11 // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 // GNU General Public License for more details. 14 // 15 // You should have received a copy of the GNU General Public License 16 // along with Moodle. If not, see <http://www.gnu.org/licenses/>. 17 18 /** 19 * Multiple plugin authentication Support library 20 * 21 * 2006-08-28 File created, AUTH return values defined. 22 * 23 * @package core 24 * @subpackage auth 25 * @copyright 1999 onwards Martin Dougiamas http://dougiamas.com 26 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 27 */ 28 29 defined('MOODLE_INTERNAL') || die(); 30 31 /** 32 * Returned when the login was successful. 33 */ 34 define('AUTH_OK', 0); 35 36 /** 37 * Returned when the login was unsuccessful. 38 */ 39 define('AUTH_FAIL', 1); 40 41 /** 42 * Returned when the login was denied (a reason for AUTH_FAIL). 43 */ 44 define('AUTH_DENIED', 2); 45 46 /** 47 * Returned when some error occurred (a reason for AUTH_FAIL). 48 */ 49 define('AUTH_ERROR', 4); 50 51 /** 52 * Authentication - error codes for user confirm 53 */ 54 define('AUTH_CONFIRM_FAIL', 0); 55 define('AUTH_CONFIRM_OK', 1); 56 define('AUTH_CONFIRM_ALREADY', 2); 57 define('AUTH_CONFIRM_ERROR', 3); 58 59 # MDL-14055 60 define('AUTH_REMOVEUSER_KEEP', 0); 61 define('AUTH_REMOVEUSER_SUSPEND', 1); 62 define('AUTH_REMOVEUSER_FULLDELETE', 2); 63 64 /** Login attempt successful. */ 65 define('AUTH_LOGIN_OK', 0); 66 67 /** Can not login because user does not exist. */ 68 define('AUTH_LOGIN_NOUSER', 1); 69 70 /** Can not login because user is suspended. */ 71 define('AUTH_LOGIN_SUSPENDED', 2); 72 73 /** Can not login, most probably password did not match. */ 74 define('AUTH_LOGIN_FAILED', 3); 75 76 /** Can not login because user is locked out. */ 77 define('AUTH_LOGIN_LOCKOUT', 4); 78 79 /** Can not login becauser user is not authorised. */ 80 define('AUTH_LOGIN_UNAUTHORISED', 5); 81 82 /** 83 * Abstract authentication plugin. 84 * 85 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 86 * @package moodlecore 87 */ 88 class auth_plugin_base { 89 90 /** 91 * The configuration details for the plugin. 92 * @var object 93 */ 94 var $config; 95 96 /** 97 * Authentication plugin type - the same as db field. 98 * @var string 99 */ 100 var $authtype; 101 /* 102 * The fields we can lock and update from/to external authentication backends 103 * @var array 104 */ 105 var $userfields = \core_user::AUTHSYNCFIELDS; 106 107 /** 108 * Moodle custom fields to sync with. 109 * @var array() 110 */ 111 var $customfields = null; 112 113 /** 114 * The tag we want to prepend to any error log messages. 115 * 116 * @var string 117 */ 118 protected $errorlogtag = ''; 119 120 /** @var array Stores extra information available to the logged in event. */ 121 protected $extrauserinfo = []; 122 123 /** 124 * This is the primary method that is used by the authenticate_user_login() 125 * function in moodlelib.php. 126 * 127 * This method should return a boolean indicating 128 * whether or not the username and password authenticate successfully. 129 * 130 * Returns true if the username and password work and false if they are 131 * wrong or don't exist. 132 * 133 * @param string $username The username (with system magic quotes) 134 * @param string $password The password (with system magic quotes) 135 * 136 * @return bool Authentication success or failure. 137 */ 138 function user_login($username, $password) { 139 throw new \moodle_exception('mustbeoveride', 'debug', '', 'user_login()' ); 140 } 141 142 /** 143 * Returns true if this authentication plugin can change the users' 144 * password. 145 * 146 * @return bool 147 */ 148 function can_change_password() { 149 //override if needed 150 return false; 151 } 152 153 /** 154 * Returns the URL for changing the users' passwords, or empty if the default 155 * URL can be used. 156 * 157 * This method is used if can_change_password() returns true. 158 * This method is called only when user is logged in, it may use global $USER. 159 * If you are using a plugin config variable in this method, please make sure it is set before using it, 160 * as this method can be called even if the plugin is disabled, in which case the config values won't be set. 161 * 162 * @return moodle_url url of the profile page or null if standard used 163 */ 164 function change_password_url() { 165 //override if needed 166 return null; 167 } 168 169 /** 170 * Returns true if this authentication plugin can edit the users' 171 * profile. 172 * 173 * @return bool 174 */ 175 function can_edit_profile() { 176 //override if needed 177 return true; 178 } 179 180 /** 181 * Returns the URL for editing the users' profile, or empty if the default 182 * URL can be used. 183 * 184 * This method is used if can_edit_profile() returns true. 185 * This method is called only when user is logged in, it may use global $USER. 186 * 187 * @return moodle_url url of the profile page or null if standard used 188 */ 189 function edit_profile_url() { 190 //override if needed 191 return null; 192 } 193 194 /** 195 * Returns true if this authentication plugin is "internal". 196 * 197 * Internal plugins use password hashes from Moodle user table for authentication. 198 * 199 * @return bool 200 */ 201 function is_internal() { 202 //override if needed 203 return true; 204 } 205 206 /** 207 * Returns false if this plugin is enabled but not configured. 208 * 209 * @return bool 210 */ 211 public function is_configured() { 212 return false; 213 } 214 215 /** 216 * Indicates if password hashes should be stored in local moodle database. 217 * @return bool true means md5 password hash stored in user table, false means flag 'not_cached' stored there instead 218 */ 219 function prevent_local_passwords() { 220 return !$this->is_internal(); 221 } 222 223 /** 224 * Indicates if moodle should automatically update internal user 225 * records with data from external sources using the information 226 * from get_userinfo() method. 227 * 228 * @return bool true means automatically copy data from ext to user table 229 */ 230 function is_synchronised_with_external() { 231 return !$this->is_internal(); 232 } 233 234 /** 235 * Updates the user's password. 236 * 237 * In previous versions of Moodle, the function 238 * auth_user_update_password accepted a username as the first parameter. The 239 * revised function expects a user object. 240 * 241 * @param object $user User table object 242 * @param string $newpassword Plaintext password 243 * 244 * @return bool True on success 245 */ 246 function user_update_password($user, $newpassword) { 247 //override if needed 248 return true; 249 } 250 251 /** 252 * Called when the user record is updated. 253 * Modifies user in external database. It takes olduser (before changes) and newuser (after changes) 254 * compares information saved modified information to external db. 255 * 256 * @param mixed $olduser Userobject before modifications (without system magic quotes) 257 * @param mixed $newuser Userobject new modified userobject (without system magic quotes) 258 * @return boolean true if updated or update ignored; false if error 259 * 260 */ 261 function user_update($olduser, $newuser) { 262 //override if needed 263 return true; 264 } 265 266 /** 267 * User delete requested - internal user record is mared as deleted already, username not present anymore. 268 * 269 * Do any action in external database. 270 * 271 * @param object $user Userobject before delete (without system magic quotes) 272 * @return void 273 */ 274 function user_delete($olduser) { 275 //override if needed 276 return; 277 } 278 279 /** 280 * Returns true if plugin allows resetting of internal password. 281 * 282 * @return bool 283 */ 284 function can_reset_password() { 285 //override if needed 286 return false; 287 } 288 289 /** 290 * Returns true if plugin allows resetting of internal password. 291 * 292 * @return bool 293 */ 294 function can_signup() { 295 //override if needed 296 return false; 297 } 298 299 /** 300 * Sign up a new user ready for confirmation. 301 * Password is passed in plaintext. 302 * 303 * @param object $user new user object 304 * @param boolean $notify print notice with link and terminate 305 */ 306 function user_signup($user, $notify=true) { 307 //override when can signup 308 throw new \moodle_exception('mustbeoveride', 'debug', '', 'user_signup()' ); 309 } 310 311 /** 312 * Return a form to capture user details for account creation. 313 * This is used in /login/signup.php. 314 * @return moodle_form A form which edits a record from the user table. 315 */ 316 function signup_form() { 317 global $CFG; 318 319 require_once($CFG->dirroot.'/login/signup_form.php'); 320 return new login_signup_form(null, null, 'post', '', array('autocomplete'=>'on')); 321 } 322 323 /** 324 * Returns true if plugin allows confirming of new users. 325 * 326 * @return bool 327 */ 328 function can_confirm() { 329 //override if needed 330 return false; 331 } 332 333 /** 334 * Confirm the new user as registered. 335 * 336 * @param string $username 337 * @param string $confirmsecret 338 */ 339 function user_confirm($username, $confirmsecret) { 340 //override when can confirm 341 throw new \moodle_exception('mustbeoveride', 'debug', '', 'user_confirm()' ); 342 } 343 344 /** 345 * Checks if user exists in external db 346 * 347 * @param string $username (with system magic quotes) 348 * @return bool 349 */ 350 function user_exists($username) { 351 //override if needed 352 return false; 353 } 354 355 /** 356 * return number of days to user password expires 357 * 358 * If userpassword does not expire it should return 0. If password is already expired 359 * it should return negative value. 360 * 361 * @param mixed $username username (with system magic quotes) 362 * @return integer 363 */ 364 function password_expire($username) { 365 return 0; 366 } 367 /** 368 * Sync roles for this user - usually creator 369 * 370 * @param $user object user object (without system magic quotes) 371 */ 372 function sync_roles($user) { 373 //override if needed 374 } 375 376 /** 377 * Read user information from external database and returns it as array(). 378 * Function should return all information available. If you are saving 379 * this information to moodle user-table you should honour synchronisation flags 380 * 381 * @param string $username username 382 * 383 * @return mixed array with no magic quotes or false on error 384 */ 385 function get_userinfo($username) { 386 //override if needed 387 return array(); 388 } 389 390 /** 391 * Prints a form for configuring this authentication plugin. 392 * 393 * This function is called from admin/auth.php, and outputs a full page with 394 * a form for configuring this plugin. 395 * 396 * @param object $config 397 * @param object $err 398 * @param array $user_fields 399 * @deprecated since Moodle 3.3 400 */ 401 function config_form($config, $err, $user_fields) { 402 debugging('Use of config.html files have been deprecated, please update your code to use the admin settings API.'); 403 //override if needed 404 } 405 406 /** 407 * A chance to validate form data, and last chance to 408 * do stuff before it is inserted in config_plugin 409 * @param object object with submitted configuration settings (without system magic quotes) 410 * @param array $err array of error messages 411 * @deprecated since Moodle 3.3 412 */ 413 function validate_form($form, &$err) { 414 debugging('Use of config.html files have been deprecated, please update your code to use the admin settings API.'); 415 //override if needed 416 } 417 418 /** 419 * Processes and stores configuration data for this authentication plugin. 420 * 421 * @param object object with submitted configuration settings (without system magic quotes) 422 * @deprecated since Moodle 3.3 423 */ 424 function process_config($config) { 425 debugging('Use of config.html files have been deprecated, please update your code to use the admin settings API.'); 426 //override if needed 427 return true; 428 } 429 430 /** 431 * Hook for overriding behaviour of login page. 432 * This method is called from login/index.php page for all enabled auth plugins. 433 * 434 * @global object 435 * @global object 436 */ 437 function loginpage_hook() { 438 global $frm; // can be used to override submitted login form 439 global $user; // can be used to replace authenticate_user_login() 440 441 //override if needed 442 } 443 444 /** 445 * Hook for overriding behaviour before going to the login page. 446 * 447 * This method is called from require_login from potentially any page for 448 * all enabled auth plugins and gives each plugin a chance to redirect 449 * directly to an external login page, or to instantly login a user where 450 * possible. 451 * 452 * If an auth plugin implements this hook, it must not rely on ONLY this 453 * hook in order to work, as there are many ways a user can browse directly 454 * to the standard login page. As a general rule in this case you should 455 * also implement the loginpage_hook as well. 456 * 457 */ 458 function pre_loginpage_hook() { 459 // override if needed, eg by redirecting to an external login page 460 // or logging in a user: 461 // complete_user_login($user); 462 } 463 464 /** 465 * Pre user_login hook. 466 * This method is called from authenticate_user_login() right after the user 467 * object is generated. This gives the auth plugins an option to make adjustments 468 * before the verification process starts. 469 * 470 * @param object $user user object, later used for $USER 471 */ 472 public function pre_user_login_hook(&$user) { 473 // Override if needed. 474 } 475 476 /** 477 * Post authentication hook. 478 * This method is called from authenticate_user_login() for all enabled auth plugins. 479 * 480 * @param object $user user object, later used for $USER 481 * @param string $username (with system magic quotes) 482 * @param string $password plain text password (with system magic quotes) 483 */ 484 function user_authenticated_hook(&$user, $username, $password) { 485 //override if needed 486 } 487 488 /** 489 * Pre logout hook. 490 * This method is called from require_logout() for all enabled auth plugins, 491 * 492 * @global object 493 */ 494 function prelogout_hook() { 495 global $USER; // use $USER->auth to find the plugin used for login 496 497 //override if needed 498 } 499 500 /** 501 * Hook for overriding behaviour of logout page. 502 * This method is called from login/logout.php page for all enabled auth plugins. 503 * 504 * @global object 505 * @global string 506 */ 507 function logoutpage_hook() { 508 global $USER; // use $USER->auth to find the plugin used for login 509 global $redirect; // can be used to override redirect after logout 510 511 //override if needed 512 } 513 514 /** 515 * Hook called before timing out of database session. 516 * This is useful for SSO and MNET. 517 * 518 * @param object $user 519 * @param string $sid session id 520 * @param int $timecreated start of session 521 * @param int $timemodified user last seen 522 * @return bool true means do not timeout session yet 523 */ 524 function ignore_timeout_hook($user, $sid, $timecreated, $timemodified) { 525 return false; 526 } 527 528 /** 529 * Return the properly translated human-friendly title of this auth plugin 530 * 531 * @todo Document this function 532 */ 533 function get_title() { 534 return get_string('pluginname', "auth_{$this->authtype}"); 535 } 536 537 /** 538 * Get the auth description (from core or own auth lang files) 539 * 540 * @return string The description 541 */ 542 function get_description() { 543 $authdescription = get_string("auth_{$this->authtype}description", "auth_{$this->authtype}"); 544 return $authdescription; 545 } 546 547 /** 548 * Returns whether or not the captcha element is enabled. 549 * 550 * @abstract Implement in child classes 551 * @return bool 552 */ 553 function is_captcha_enabled() { 554 return false; 555 } 556 557 /** 558 * Returns whether or not this authentication plugin can be manually set 559 * for users, for example, when bulk uploading users. 560 * 561 * This should be overriden by authentication plugins where setting the 562 * authentication method manually is allowed. 563 * 564 * @return bool 565 * @since Moodle 2.6 566 */ 567 function can_be_manually_set() { 568 // Override if needed. 569 return false; 570 } 571 572 /** 573 * Returns a list of potential IdPs that this authentication plugin supports. 574 * 575 * This is used to provide links on the login page and the login block. 576 * 577 * The parameter $wantsurl is typically used by the plugin to implement a 578 * return-url feature. 579 * 580 * The returned value is expected to be a list of associative arrays with 581 * string keys: 582 * 583 * - url => (moodle_url|string) URL of the page to send the user to for authentication 584 * - name => (string) Human readable name of the IdP 585 * - iconurl => (moodle_url|string) URL of the icon representing the IdP (since Moodle 3.3) 586 * 587 * For legacy reasons, pre-3.3 plugins can provide the icon via the key: 588 * 589 * - icon => (pix_icon) Icon representing the IdP 590 * 591 * @param string $wantsurl The relative url fragment the user wants to get to. 592 * @return array List of associative arrays with keys url, name, iconurl|icon 593 */ 594 function loginpage_idp_list($wantsurl) { 595 return array(); 596 } 597 598 /** 599 * Return custom user profile fields. 600 * 601 * @return array list of custom fields. 602 */ 603 public function get_custom_user_profile_fields() { 604 global $CFG; 605 require_once($CFG->dirroot . '/user/profile/lib.php'); 606 607 // If already retrieved then return. 608 if (!is_null($this->customfields)) { 609 return $this->customfields; 610 } 611 612 $this->customfields = array(); 613 if ($proffields = profile_get_custom_fields()) { 614 foreach ($proffields as $proffield) { 615 $this->customfields[] = 'profile_field_'.$proffield->shortname; 616 } 617 } 618 unset($proffields); 619 620 return $this->customfields; 621 } 622 623 /** 624 * Post logout hook. 625 * 626 * This method is used after moodle logout by auth classes to execute server logout. 627 * 628 * @param stdClass $user clone of USER object before the user session was terminated 629 */ 630 public function postlogout_hook($user) { 631 } 632 633 /** 634 * Update a local user record from an external source. 635 * This is a lighter version of the one in moodlelib -- won't do 636 * expensive ops such as enrolment. 637 * 638 * @param string $username username 639 * @param array $updatekeys fields to update, false updates all fields. 640 * @param bool $triggerevent set false if user_updated event should not be triggered. 641 * This will not affect user_password_updated event triggering. 642 * @param bool $suspenduser Should the user be suspended? 643 * @return stdClass|bool updated user record or false if there is no new info to update. 644 */ 645 protected function update_user_record($username, $updatekeys = false, $triggerevent = false, $suspenduser = false) { 646 global $CFG, $DB; 647 648 require_once($CFG->dirroot.'/user/profile/lib.php'); 649 650 // Just in case check text case. 651 $username = trim(core_text::strtolower($username)); 652 653 // Get the current user record. 654 $user = $DB->get_record('user', array('username' => $username, 'mnethostid' => $CFG->mnet_localhost_id)); 655 if (empty($user)) { // Trouble. 656 error_log($this->errorlogtag . get_string('auth_usernotexist', 'auth', $username)); 657 throw new \moodle_exception('auth_usernotexist', 'auth', '', $username); 658 die; 659 } 660 661 // Protect the userid from being overwritten. 662 $userid = $user->id; 663 664 $needsupdate = false; 665 666 if ($newinfo = $this->get_userinfo($username)) { 667 $newinfo = truncate_userinfo($newinfo); 668 669 if (empty($updatekeys)) { // All keys? this does not support removing values. 670 $updatekeys = array_keys($newinfo); 671 } 672 673 if (!empty($updatekeys)) { 674 $newuser = new stdClass(); 675 $newuser->id = $userid; 676 // The cast to int is a workaround for MDL-53959. 677 $newuser->suspended = (int) $suspenduser; 678 // Load all custom fields. 679 $profilefields = (array) profile_user_record($user->id, false); 680 $newprofilefields = []; 681 682 foreach ($updatekeys as $key) { 683 if (isset($newinfo[$key])) { 684 $value = $newinfo[$key]; 685 } else { 686 $value = ''; 687 } 688 689 if (!empty($this->config->{'field_updatelocal_' . $key})) { 690 if (preg_match('/^profile_field_(.*)$/', $key, $match)) { 691 // Custom field. 692 $field = $match[1]; 693 $currentvalue = isset($profilefields[$field]) ? $profilefields[$field] : null; 694 $newprofilefields[$field] = $value; 695 } else { 696 // Standard field. 697 $currentvalue = isset($user->$key) ? $user->$key : null; 698 $newuser->$key = $value; 699 } 700 701 // Only update if it's changed. 702 if ($currentvalue !== $value) { 703 $needsupdate = true; 704 } 705 } 706 } 707 } 708 709 if ($needsupdate) { 710 user_update_user($newuser, false, $triggerevent); 711 profile_save_custom_fields($newuser->id, $newprofilefields); 712 return $DB->get_record('user', array('id' => $userid, 'deleted' => 0)); 713 } 714 } 715 716 return false; 717 } 718 719 /** 720 * Return the list of enabled identity providers. 721 * 722 * Each identity provider data contains the keys url, name and iconurl (or 723 * icon). See the documentation of {@link auth_plugin_base::loginpage_idp_list()} 724 * for detailed description of the returned structure. 725 * 726 * @param array $authsequence site's auth sequence (list of auth plugins ordered) 727 * @return array List of arrays describing the identity providers 728 */ 729 public static function get_identity_providers($authsequence) { 730 global $SESSION; 731 732 $identityproviders = []; 733 foreach ($authsequence as $authname) { 734 $authplugin = get_auth_plugin($authname); 735 $wantsurl = (isset($SESSION->wantsurl)) ? $SESSION->wantsurl : ''; 736 $identityproviders = array_merge($identityproviders, $authplugin->loginpage_idp_list($wantsurl)); 737 } 738 return $identityproviders; 739 } 740 741 /** 742 * Prepare a list of identity providers for output. 743 * 744 * @param array $identityproviders as returned by {@link self::get_identity_providers()} 745 * @param renderer_base $output 746 * @return array the identity providers ready for output 747 */ 748 public static function prepare_identity_providers_for_output($identityproviders, renderer_base $output) { 749 $data = []; 750 foreach ($identityproviders as $idp) { 751 if (!empty($idp['icon'])) { 752 // Pre-3.3 auth plugins provide icon as a pix_icon instance. New auth plugins (since 3.3) provide iconurl. 753 $idp['iconurl'] = $output->image_url($idp['icon']->pix, $idp['icon']->component); 754 } 755 if ($idp['iconurl'] instanceof moodle_url) { 756 $idp['iconurl'] = $idp['iconurl']->out(false); 757 } 758 unset($idp['icon']); 759 if ($idp['url'] instanceof moodle_url) { 760 $idp['url'] = $idp['url']->out(false); 761 } 762 $data[] = $idp; 763 } 764 return $data; 765 } 766 767 /** 768 * Returns information on how the specified user can change their password. 769 * 770 * @param stdClass $user A user object 771 * @return string[] An array of strings with keys subject and message 772 */ 773 public function get_password_change_info(stdClass $user) : array { 774 775 global $USER; 776 777 $site = get_site(); 778 $systemcontext = context_system::instance(); 779 780 $data = new stdClass(); 781 $data->firstname = $user->firstname; 782 $data->lastname = $user->lastname; 783 $data->username = $user->username; 784 $data->sitename = format_string($site->fullname); 785 $data->admin = generate_email_signoff(); 786 787 // This is a workaround as change_password_url() is designed to allow 788 // use of the $USER global. See MDL-66984. 789 $olduser = $USER; 790 $USER = $user; 791 if ($this->can_change_password() and $this->change_password_url()) { 792 // We have some external url for password changing. 793 $data->link = $this->change_password_url()->out(); 794 } else { 795 // No way to change password, sorry. 796 $data->link = ''; 797 } 798 $USER = $olduser; 799 800 if (!empty($data->link) and has_capability('moodle/user:changeownpassword', $systemcontext, $user->id)) { 801 $subject = get_string('emailpasswordchangeinfosubject', '', format_string($site->fullname)); 802 $message = get_string('emailpasswordchangeinfo', '', $data); 803 } else { 804 $subject = get_string('emailpasswordchangeinfosubject', '', format_string($site->fullname)); 805 $message = get_string('emailpasswordchangeinfofail', '', $data); 806 } 807 808 return [ 809 'subject' => $subject, 810 'message' => $message 811 ]; 812 } 813 814 /** 815 * Set extra user information. 816 * 817 * @param array $values Any Key value pair. 818 * @return void 819 */ 820 public function set_extrauserinfo(array $values): void { 821 $this->extrauserinfo = $values; 822 } 823 824 /** 825 * Returns extra user information. 826 * 827 * @return array An array of keys and values 828 */ 829 public function get_extrauserinfo(): array { 830 return $this->extrauserinfo; 831 } 832 } 833 834 /** 835 * Verify if user is locked out. 836 * 837 * @param stdClass $user 838 * @return bool true if user locked out 839 */ 840 function login_is_lockedout($user) { 841 global $CFG; 842 843 if ($user->mnethostid != $CFG->mnet_localhost_id) { 844 return false; 845 } 846 if (isguestuser($user)) { 847 return false; 848 } 849 850 if (empty($CFG->lockoutthreshold)) { 851 // Lockout not enabled. 852 return false; 853 } 854 855 if (get_user_preferences('login_lockout_ignored', 0, $user)) { 856 // This preference may be used for accounts that must not be locked out. 857 return false; 858 } 859 860 $locked = get_user_preferences('login_lockout', 0, $user); 861 if (!$locked) { 862 return false; 863 } 864 865 if (empty($CFG->lockoutduration)) { 866 // Locked out forever. 867 return true; 868 } 869 870 if (time() - $locked < $CFG->lockoutduration) { 871 return true; 872 } 873 874 login_unlock_account($user); 875 876 return false; 877 } 878 879 /** 880 * To be called after valid user login. 881 * @param stdClass $user 882 */ 883 function login_attempt_valid($user) { 884 global $CFG; 885 886 // Note: user_loggedin event is triggered in complete_user_login(). 887 888 if ($user->mnethostid != $CFG->mnet_localhost_id) { 889 return; 890 } 891 if (isguestuser($user)) { 892 return; 893 } 894 895 // Always unlock here, there might be some race conditions or leftovers when switching threshold. 896 login_unlock_account($user); 897 } 898 899 /** 900 * To be called after failed user login. 901 * @param stdClass $user 902 * @throws moodle_exception 903 */ 904 function login_attempt_failed($user) { 905 global $CFG; 906 907 if ($user->mnethostid != $CFG->mnet_localhost_id) { 908 return; 909 } 910 if (isguestuser($user)) { 911 return; 912 } 913 914 // Force user preferences cache reload to ensure the most up-to-date login_failed_count is fetched. 915 // This is perhaps overzealous but is the documented way of reloading the cache, as per the test method 916 // 'test_check_user_preferences_loaded'. 917 unset($user->preference); 918 919 $resource = 'user:' . $user->id; 920 $lockfactory = \core\lock\lock_config::get_lock_factory('core_failed_login_count_lock'); 921 922 // Get a new lock for the resource, waiting for it for a maximum of 10 seconds. 923 if ($lock = $lockfactory->get_lock($resource, 10)) { 924 try { 925 $count = get_user_preferences('login_failed_count', 0, $user); 926 $last = get_user_preferences('login_failed_last', 0, $user); 927 $sincescuccess = get_user_preferences('login_failed_count_since_success', $count, $user); 928 $sincescuccess = $sincescuccess + 1; 929 set_user_preference('login_failed_count_since_success', $sincescuccess, $user); 930 931 if (empty($CFG->lockoutthreshold)) { 932 // No threshold means no lockout. 933 // Always unlock here, there might be some race conditions or leftovers when switching threshold. 934 login_unlock_account($user); 935 $lock->release(); 936 return; 937 } 938 939 if (!empty($CFG->lockoutwindow) and time() - $last > $CFG->lockoutwindow) { 940 $count = 0; 941 } 942 943 $count = $count + 1; 944 945 set_user_preference('login_failed_count', $count, $user); 946 set_user_preference('login_failed_last', time(), $user); 947 948 if ($count >= $CFG->lockoutthreshold) { 949 login_lock_account($user); 950 } 951 952 // Release locks when we're done. 953 $lock->release(); 954 } catch (Exception $e) { 955 // Always release the lock on a failure. 956 $lock->release(); 957 } 958 } else { 959 // We did not get access to the resource in time, give up. 960 throw new moodle_exception('locktimeout'); 961 } 962 } 963 964 /** 965 * Lockout user and send notification email. 966 * 967 * @param stdClass $user 968 */ 969 function login_lock_account($user) { 970 global $CFG; 971 972 if ($user->mnethostid != $CFG->mnet_localhost_id) { 973 return; 974 } 975 if (isguestuser($user)) { 976 return; 977 } 978 979 if (get_user_preferences('login_lockout_ignored', 0, $user)) { 980 // This user can not be locked out. 981 return; 982 } 983 984 $alreadylockedout = get_user_preferences('login_lockout', 0, $user); 985 986 set_user_preference('login_lockout', time(), $user); 987 988 if ($alreadylockedout == 0) { 989 $secret = random_string(15); 990 set_user_preference('login_lockout_secret', $secret, $user); 991 992 $oldforcelang = force_current_language($user->lang); 993 994 $site = get_site(); 995 $supportuser = core_user::get_support_user(); 996 997 $data = new stdClass(); 998 $data->firstname = $user->firstname; 999 $data->lastname = $user->lastname; 1000 $data->username = $user->username; 1001 $data->sitename = format_string($site->fullname); 1002 $data->link = $CFG->wwwroot.'/login/unlock_account.php?u='.$user->id.'&s='.$secret; 1003 $data->admin = generate_email_signoff(); 1004 1005 $message = get_string('lockoutemailbody', 'admin', $data); 1006 $subject = get_string('lockoutemailsubject', 'admin', format_string($site->fullname)); 1007 1008 if ($message) { 1009 // Directly email rather than using the messaging system to ensure its not routed to a popup or jabber. 1010 email_to_user($user, $supportuser, $subject, $message); 1011 } 1012 1013 force_current_language($oldforcelang); 1014 } 1015 } 1016 1017 /** 1018 * Unlock user account and reset timers. 1019 * 1020 * @param stdClass $user 1021 */ 1022 function login_unlock_account($user) { 1023 unset_user_preference('login_lockout', $user); 1024 unset_user_preference('login_failed_count', $user); 1025 unset_user_preference('login_failed_last', $user); 1026 1027 // Note: do not clear the lockout secret because user might click on the link repeatedly. 1028 } 1029 1030 /** 1031 * Returns whether or not the captcha element is enabled, and the admin settings fulfil its requirements. 1032 * @return bool 1033 */ 1034 function signup_captcha_enabled() { 1035 global $CFG; 1036 $authplugin = get_auth_plugin($CFG->registerauth); 1037 return !empty($CFG->recaptchapublickey) && !empty($CFG->recaptchaprivatekey) && $authplugin->is_captcha_enabled(); 1038 } 1039 1040 /** 1041 * Validates the standard sign-up data (except recaptcha that is validated by the form element). 1042 * 1043 * @param array $data the sign-up data 1044 * @param array $files files among the data 1045 * @return array list of errors, being the key the data element name and the value the error itself 1046 * @since Moodle 3.2 1047 */ 1048 function signup_validate_data($data, $files) { 1049 global $CFG, $DB; 1050 1051 $errors = array(); 1052 $authplugin = get_auth_plugin($CFG->registerauth); 1053 1054 if ($DB->record_exists('user', array('username' => $data['username'], 'mnethostid' => $CFG->mnet_localhost_id))) { 1055 $errors['username'] = get_string('usernameexists'); 1056 } else { 1057 // Check allowed characters. 1058 if ($data['username'] !== core_text::strtolower($data['username'])) { 1059 $errors['username'] = get_string('usernamelowercase'); 1060 } else { 1061 if ($data['username'] !== core_user::clean_field($data['username'], 'username')) { 1062 $errors['username'] = get_string('invalidusername'); 1063 } 1064 1065 } 1066 } 1067 1068 // Check if user exists in external db. 1069 // TODO: maybe we should check all enabled plugins instead. 1070 if ($authplugin->user_exists($data['username'])) { 1071 $errors['username'] = get_string('usernameexists'); 1072 } 1073 1074 if (! validate_email($data['email'])) { 1075 $errors['email'] = get_string('invalidemail'); 1076 1077 } else if (empty($CFG->allowaccountssameemail)) { 1078 // Emails in Moodle as case-insensitive and accents-sensitive. Such a combination can lead to very slow queries 1079 // on some DBs such as MySQL. So we first get the list of candidate users in a subselect via more effective 1080 // accent-insensitive query that can make use of the index and only then we search within that limited subset. 1081 $sql = "SELECT 'x' 1082 FROM {user} 1083 WHERE " . $DB->sql_equal('email', ':email1', false, true) . " 1084 AND id IN (SELECT id 1085 FROM {user} 1086 WHERE " . $DB->sql_equal('email', ':email2', false, false) . " 1087 AND mnethostid = :mnethostid)"; 1088 1089 $params = array( 1090 'email1' => $data['email'], 1091 'email2' => $data['email'], 1092 'mnethostid' => $CFG->mnet_localhost_id, 1093 ); 1094 1095 // If there are other user(s) that already have the same email, show an error. 1096 if ($DB->record_exists_sql($sql, $params)) { 1097 $forgotpasswordurl = new moodle_url('/login/forgot_password.php'); 1098 $forgotpasswordlink = html_writer::link($forgotpasswordurl, get_string('emailexistshintlink')); 1099 $errors['email'] = get_string('emailexists') . ' ' . get_string('emailexistssignuphint', 'moodle', $forgotpasswordlink); 1100 } 1101 } 1102 if (empty($data['email2'])) { 1103 $errors['email2'] = get_string('missingemail'); 1104 1105 } else if (core_text::strtolower($data['email2']) != core_text::strtolower($data['email'])) { 1106 $errors['email2'] = get_string('invalidemail'); 1107 } 1108 if (!isset($errors['email'])) { 1109 if ($err = email_is_not_allowed($data['email'])) { 1110 $errors['email'] = $err; 1111 } 1112 } 1113 1114 // Construct fake user object to check password policy against required information. 1115 $tempuser = new stdClass(); 1116 // To prevent errors with check_password_policy(), 1117 // the temporary user and the guest must not share the same ID. 1118 $tempuser->id = (int)$CFG->siteguest + 1; 1119 $tempuser->username = $data['username']; 1120 $tempuser->firstname = $data['firstname']; 1121 $tempuser->lastname = $data['lastname']; 1122 $tempuser->email = $data['email']; 1123 1124 $errmsg = ''; 1125 if (!check_password_policy($data['password'], $errmsg, $tempuser)) { 1126 $errors['password'] = $errmsg; 1127 } 1128 1129 // Validate customisable profile fields. (profile_validation expects an object as the parameter with userid set). 1130 $dataobject = (object)$data; 1131 $dataobject->id = 0; 1132 $errors += profile_validation($dataobject, $files); 1133 1134 return $errors; 1135 } 1136 1137 /** 1138 * Add the missing fields to a user that is going to be created 1139 * 1140 * @param stdClass $user the new user object 1141 * @return stdClass the user filled 1142 * @since Moodle 3.2 1143 */ 1144 function signup_setup_new_user($user) { 1145 global $CFG; 1146 1147 $user->confirmed = 0; 1148 $user->lang = current_language(); 1149 $user->firstaccess = 0; 1150 $user->timecreated = time(); 1151 $user->mnethostid = $CFG->mnet_localhost_id; 1152 $user->secret = random_string(15); 1153 $user->auth = $CFG->registerauth; 1154 // Initialize alternate name fields to empty strings. 1155 $namefields = array_diff(\core_user\fields::get_name_fields(), useredit_get_required_name_fields()); 1156 foreach ($namefields as $namefield) { 1157 $user->$namefield = ''; 1158 } 1159 return $user; 1160 } 1161 1162 /** 1163 * Check if user confirmation is enabled on this site and return the auth plugin handling registration if enabled. 1164 * 1165 * @return stdClass the current auth plugin handling user registration or false if registration not enabled 1166 * @since Moodle 3.2 1167 */ 1168 function signup_get_user_confirmation_authplugin() { 1169 global $CFG; 1170 1171 if (empty($CFG->registerauth)) { 1172 return false; 1173 } 1174 $authplugin = get_auth_plugin($CFG->registerauth); 1175 1176 if (!$authplugin->can_confirm()) { 1177 return false; 1178 } 1179 return $authplugin; 1180 } 1181 1182 /** 1183 * Check if sign-up is enabled in the site. If is enabled, the function will return the authplugin instance. 1184 * 1185 * @return mixed false if sign-up is not enabled, the authplugin instance otherwise. 1186 * @since Moodle 3.2 1187 */ 1188 function signup_is_enabled() { 1189 global $CFG; 1190 1191 if (!empty($CFG->registerauth)) { 1192 $authplugin = get_auth_plugin($CFG->registerauth); 1193 if ($authplugin->can_signup()) { 1194 return $authplugin; 1195 } 1196 } 1197 return false; 1198 } 1199 1200 /** 1201 * Helper function used to print locking for auth plugins on admin pages. 1202 * @param stdclass $settings Moodle admin settings instance 1203 * @param string $auth authentication plugin shortname 1204 * @param array $userfields user profile fields 1205 * @param string $helptext help text to be displayed at top of form 1206 * @param boolean $mapremotefields Map fields or lock only. 1207 * @param boolean $updateremotefields Allow remote updates 1208 * @param array $customfields list of custom profile fields 1209 * @since Moodle 3.3 1210 */ 1211 function display_auth_lock_options($settings, $auth, $userfields, $helptext, $mapremotefields, $updateremotefields, $customfields = array()) { 1212 global $CFG; 1213 require_once($CFG->dirroot . '/user/profile/lib.php'); 1214 1215 // Introductory explanation and help text. 1216 if ($mapremotefields) { 1217 $settings->add(new admin_setting_heading($auth.'/data_mapping', new lang_string('auth_data_mapping', 'auth'), $helptext)); 1218 } else { 1219 $settings->add(new admin_setting_heading($auth.'/auth_fieldlocks', new lang_string('auth_fieldlocks', 'auth'), $helptext)); 1220 } 1221 1222 // Generate the list of options. 1223 $lockoptions = array ('unlocked' => get_string('unlocked', 'auth'), 1224 'unlockedifempty' => get_string('unlockedifempty', 'auth'), 1225 'locked' => get_string('locked', 'auth')); 1226 $updatelocaloptions = array('oncreate' => get_string('update_oncreate', 'auth'), 1227 'onlogin' => get_string('update_onlogin', 'auth')); 1228 $updateextoptions = array('0' => get_string('update_never', 'auth'), 1229 '1' => get_string('update_onupdate', 'auth')); 1230 1231 // Generate the list of profile fields to allow updates / lock. 1232 if (!empty($customfields)) { 1233 $userfields = array_merge($userfields, $customfields); 1234 $allcustomfields = profile_get_custom_fields(); 1235 $customfieldname = array_combine(array_column($allcustomfields, 'shortname'), $allcustomfields); 1236 } 1237 1238 foreach ($userfields as $field) { 1239 // Define the fieldname we display to the user. 1240 // this includes special handling for some profile fields. 1241 $fieldname = $field; 1242 $fieldnametoolong = false; 1243 if ($fieldname === 'lang') { 1244 $fieldname = get_string('language'); 1245 } else if (!empty($customfields) && in_array($field, $customfields)) { 1246 // If custom field then pick name from database. 1247 $fieldshortname = str_replace('profile_field_', '', $fieldname); 1248 $fieldname = $customfieldname[$fieldshortname]->name; 1249 if (core_text::strlen($fieldshortname) > 67) { 1250 // If custom profile field name is longer than 67 characters we will not be able to store the setting 1251 // such as 'field_updateremote_profile_field_NOTSOSHORTSHORTNAME' in the database because the character 1252 // limit for the setting name is 100. 1253 $fieldnametoolong = true; 1254 } 1255 } else { 1256 $fieldname = get_string($fieldname); 1257 } 1258 1259 // Generate the list of fields / mappings. 1260 if ($fieldnametoolong) { 1261 // Display a message that the field can not be mapped because it's too long. 1262 $url = new moodle_url('/user/profile/index.php'); 1263 $a = (object)['fieldname' => s($fieldname), 'shortname' => s($field), 'charlimit' => 67, 'link' => $url->out()]; 1264 $settings->add(new admin_setting_heading($auth.'/field_not_mapped_'.sha1($field), '', 1265 get_string('cannotmapfield', 'auth', $a))); 1266 } else if ($mapremotefields) { 1267 // We are mapping to a remote field here. 1268 // Mapping. 1269 $settings->add(new admin_setting_configtext("auth_{$auth}/field_map_{$field}", 1270 get_string('auth_fieldmapping', 'auth', $fieldname), '', '', PARAM_RAW, 30)); 1271 1272 // Update local. 1273 $settings->add(new admin_setting_configselect("auth_{$auth}/field_updatelocal_{$field}", 1274 get_string('auth_updatelocalfield', 'auth', $fieldname), '', 'oncreate', $updatelocaloptions)); 1275 1276 // Update remote. 1277 if ($updateremotefields) { 1278 $settings->add(new admin_setting_configselect("auth_{$auth}/field_updateremote_{$field}", 1279 get_string('auth_updateremotefield', 'auth', $fieldname), '', 0, $updateextoptions)); 1280 } 1281 1282 // Lock fields. 1283 $settings->add(new admin_setting_configselect("auth_{$auth}/field_lock_{$field}", 1284 get_string('auth_fieldlockfield', 'auth', $fieldname), '', 'unlocked', $lockoptions)); 1285 1286 } else { 1287 // Lock fields Only. 1288 $settings->add(new admin_setting_configselect("auth_{$auth}/field_lock_{$field}", 1289 get_string('auth_fieldlockfield', 'auth', $fieldname), '', 'unlocked', $lockoptions)); 1290 } 1291 } 1292 }
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