auth/imap/auth.php

   1 <?php
   2
   3 /**
   4  * @author Martin Dougiamas
   5  * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
   6  * @package moodle multiauth
   7  *
   8  * Authentication Plugin: IMAP Authentication
   9  *
  10  * Authenticates against an IMAP server.
  11  *
  12  * 2006-08-31  File created.
  13  */
  14
  15 if (!defined('MOODLE_INTERNAL')) {
  16     die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
  17 }
  18
  19 require_once($CFG->libdir.'/authlib.php');
  20
  21 /**
  22  * IMAP authentication plugin.
  23  */
  24 class auth_plugin_imap extends auth_plugin_base {
  25
  26     /**
  27      * Constructor.
  28      */
  29     function auth_plugin_imap() {
  30         $this->authtype = 'imap';
  31         $this->config = get_config('auth/imap');
  32     }
  33
  34     /**
  35      * Returns true if the username and password work and false if they are
  36      * wrong or don't exist.
  37      *
  38      * @param string $username The username (with system magic quotes)
  39      * @param string $password The password (with system magic quotes)
  40      * @return bool Authentication success or failure.
  41      */
  42     function user_login ($username, $password) {
  43         if (! function_exists('imap_open')) {
  44             print_error('auth_imapnotinstalled','mnet');
  45             return false;
  46         }
  47
  48         global $CFG;
  49         $hosts = explode(';', $this->config->host);   // Could be multiple hosts
  50
  51         foreach ($hosts as $host) {                 // Try each host in turn
  52             $host = trim($host);
  53
  54             switch ($this->config->type) {
  55                 case 'imapssl':
  56                     $host = '{'.$host.":{$this->config->port}/imap/ssl}";
  57                 break;
  58
  59                 case 'imapcert':
  60                     $host = '{'.$host.":{$this->config->port}/imap/ssl/novalidate-cert}";
  61                 break;
  62
  63                 case 'imaptls':
  64                     $host = '{'.$host.":{$this->config->port}/imap/tls}";
  65                 break;
  66
  67                 default:
  68                     $host = '{'.$host.":{$this->config->port}/imap}";
  69             }
  70
  71             error_reporting(0);
  72             $connection = imap_open($host, $username, $password, OP_HALFOPEN);
  73             error_reporting($CFG->debug);
  74
  75             if ($connection) {
  76                 imap_close($connection);
  77                 return true;
  78             }
  79         }
  80
  81         return false;  // No match
  82     }
  83
  84     function prevent_local_passwords() {
  85         return true;
  86     }
  87
  88     /**
  89      * Returns true if this authentication plugin is 'internal'.
  90      *
  91      * @return bool
  92      */
  93     function is_internal() {
  94         return false;
  95     }
  96
  97     /**
  98      * Returns true if this authentication plugin can change the user's
  99      * password.
 100      *
 101      * @return bool
 102      */
 103     function can_change_password() {
 104         return !empty($this->config->changepasswordurl);
 105     }
 106
 107     /**
 108      * Returns the URL for changing the user's pw, or empty if the default can
 109      * be used.
 110      *
 111      * @return moodle_url
 112      */
 113     function change_password_url() {
 114         return new moodle_url($this->config->changepasswordurl);
 115     }
 116
 117     /**
 118      * Prints a form for configuring this authentication plugin.
 119      *
 120      * This function is called from admin/auth.php, and outputs a full page with
 121      * a form for configuring this plugin.
 122      *
 123      * @param array $page An object containing all the data for this page.
 124      */
 125     function config_form($config, $err, $user_fields) {
 126         global $OUTPUT;
 127
 128         include "config.html";
 129     }
 130
 131     /**
 132      * Processes and stores configuration data for this authentication plugin.
 133      */
 134     function process_config($config) {
 135         // set to defaults if undefined
 136         if (!isset ($config->host)) {
 137             $config->host = '127.0.0.1';
 138         }
 139         if (!isset ($config->type)) {
 140             $config->type = 'imap';
 141         }
 142         if (!isset ($config->port)) {
 143             $config->port = '143';
 144         }
 145         if (!isset($config->changepasswordurl)) {
 146             $config->changepasswordurl = '';
 147         }
 148
 149         // save settings
 150         set_config('host', $config->host, 'auth/imap');
 151         set_config('type', $config->type, 'auth/imap');
 152         set_config('port', $config->port, 'auth/imap');
 153         set_config('changepasswordurl', $config->changepasswordurl, 'auth/imap');
 154
 155         return true;
 156     }
 157
 158 }
 159
 160