modules/auth.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2011 Polytechnique.org                              *
   4  *  http://opensource.polytechnique.org/                                   *
   5  *                                                                         *
   6  *  This program is free software; you can redistribute it and/or modify   *
   7  *  it under the terms of the GNU General Public License as published by   *
   8  *  the Free Software Foundation; either version 2 of the License, or      *
   9  *  (at your option) any later version.                                    *
  10  *                                                                         *
  11  *  This program is distributed in the hope that it will be useful,        *
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  14  *  GNU General Public License for more details.                           *
  15  *                                                                         *
  16  *  You should have received a copy of the GNU General Public License      *
  17  *  along with this program; if not, write to the Free Software            *
  18  *  Foundation, Inc.,                                                      *
  19  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
  20  ***************************************************************************/
  21
  22 class AuthModule extends PLModule
  23 {
  24     function handlers()
  25     {
  26         return array(
  27             'groupex/donne-chall.php'       => $this->make_hook('chall',              AUTH_PUBLIC),
  28             'groupex/export-econfiance.php' => $this->make_hook('econf',              AUTH_PUBLIC, 'user', NO_HTTPS),
  29
  30             'webservices/manageurs.php'     => $this->make_hook('manageurs',          AUTH_PUBLIC, 'user', NO_HTTPS),
  31
  32             'auth-redirect.php'             => $this->make_hook('redirect',           AUTH_COOKIE, 'user'),
  33             'auth-groupex.php'              => $this->make_hook('groupex_old',        AUTH_COOKIE, ''),
  34             'auth-groupex'                  => $this->make_hook('groupex',            AUTH_PUBLIC, ''),
  35             'admin/auth-groupes-x'          => $this->make_hook('admin_authgroupesx', AUTH_PASSWD, 'admin'),
  36         );
  37     }
  38
  39     function handler_chall($page)
  40     {
  41         $_SESSION["chall"] = uniqid(rand(), 1);
  42         echo $_SESSION["chall"] . "\n" . session_id();
  43         exit;
  44     }
  45
  46     function handler_econf($page)
  47     {
  48         global $globals;
  49
  50         $cle = $globals->core->econfiance;
  51
  52         $res = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\n<membres>\n\n";
  53
  54         if (S::v('chall') && Get::s('PASS') == md5(S::v('chall').$cle)) {
  55             $list = new MMList(User::getWithUID(10154), "x-econfiance.polytechnique.org");
  56             $members = $list->get_members('membres');
  57             if (is_array($members)) {
  58                 $membres = Array();
  59                 foreach($members[1] as $member) {
  60                     $user = User::getSilent($member[1]);
  61                     if ($user && $user->hasProfile()) {
  62                         $profile = $user->profile();
  63                         $res .= "<membre>\n";
  64                         $res .= "\t<nom>" . $profile->lastName() . "</nom>\n";
  65                         $res .= "\t<prenom>" . $profile->firstName() . "</prenom>\n";
  66                         $res .= "\t<email>" . $user->forlifeEmail() . "</email>\n";
  67                         $res .= "</membre>\n\n";
  68                     }
  69                 }
  70             }
  71             $res .= "</membres>\n\n";
  72
  73             pl_content_headers("text/xml");
  74             echo $res;
  75         }
  76         exit;
  77     }
  78
  79     function handler_manageurs($page)
  80     {
  81         global $globals;
  82
  83         require_once 'webservices/manageurs.server.inc.php';
  84
  85         $ips = array_flip(explode(' ', $globals->manageurs->authorized_ips));
  86         if ($ips && isset($ips[$_SERVER['REMOTE_ADDR']])) {
  87             $server = xmlrpc_server_create();
  88
  89             xmlrpc_server_register_method($server, 'get_annuaire_infos', 'get_annuaire_infos');
  90             xmlrpc_server_register_method($server, 'get_nouveau_infos', 'get_nouveau_infos');
  91
  92             $request  = @$GLOBALS['HTTP_RAW_POST_DATA'];
  93             $response = xmlrpc_server_call_method($server, $request, null);
  94             pl_content_headers("text/xml");
  95             print $response;
  96             xmlrpc_server_destroy($server);
  97         }
  98
  99         exit;
 100     }
 101
 102     function handler_redirect($page)
 103     {
 104         http_redirect(Env::v('dest', '/'));
 105     }
 106
 107     function handler_groupex_old($page)
 108     {
 109         return $this->handler_groupex($page, 'iso-8859-1');
 110     }
 111
 112     /** Handles the 'auth-groupe-x' authentication.
 113      * Expects the following GET parameters:
 114      * - pass: the 'password' for the authentication
 115      * - challenge: the authentication challenge
 116      * - url: the return URL
 117      * - session: the remote PHP session ID
 118      */
 119     function handler_groupex($page, $charset = 'utf8')
 120     {
 121         if (!S::logged()) {
 122             $page->assign('external_auth', true);
 123             $page->setTitle('Authentification');
 124             $page->setDefaultSkin('group_login');
 125
 126             if (Get::has('group')) {
 127                 $res = XDB::query('SELECT  nom
 128                                      FROM  groups
 129                                     WHERE  diminutif = {?}', Get::s('group'));
 130                 $page->assign('group', $res->fetchOneCell());
 131             } else {
 132                 $page->assign('group', null);
 133             }
 134             return PL_DO_AUTH;
 135         }
 136
 137         if (!S::user()->checkPerms('groups')) {
 138             return PL_FORBIDDEN;
 139         }
 140
 141         $this->load('auth.inc.php');
 142
 143         $gpex_pass = Get::s('pass');
 144         $gpex_url  = urldecode(Get::s('url'));
 145         if (Get::has('session')) {
 146             if (strpos($gpex_url, '?') === false) {
 147                 $gpex_url .= "?PHPSESSID=" . Get::s('session');
 148             } else {
 149                 $gpex_url .= "&PHPSESSID=" . Get::s('session');
 150             }
 151         }
 152
 153         // Normalize the return URL.
 154         if (!preg_match("/^(http|https):\/\/.*/",$gpex_url)) {
 155             $gpex_url = "http://$gpex_url";
 156         }
 157         $gpex_challenge = Get::s('challenge');
 158
 159         // Update the last login information (unless the user is in SUID).
 160         $uid = S::i('uid');
 161         if (!S::suid()) {
 162             global $platal;
 163             S::logger($uid)->log('connexion_auth_ext', $platal->path.' '.urldecode($_GET['url']));
 164         }
 165
 166         if (Get::has('group')) {
 167             $req_group_id = XDB::fetchOneCell('SELECT  id
 168                                                  FROM  groups
 169                                                 WHERE  diminutif = {?}',
 170                                               Get::s('group'));
 171         } else {
 172             $req_group_id = null;
 173         }
 174
 175         // Iterate over the auth token to find which one did sign the request.
 176         $res = XDB::iterRow(
 177             'SELECT  ga.privkey, ga.name, ga.datafields, ga.returnurls,
 178                      ga.group_id, ga.flags, g.nom
 179                FROM  group_auth AS ga
 180           LEFT JOIN  groups AS g ON (g.id = ga.group_id)');
 181
 182         while (list($privkey, $name, $datafields, $returnurls, $group_id, $group_flags, $group_name) = $res->next()) {
 183             if (md5($gpex_challenge.$privkey) == $gpex_pass) {
 184                 $returnurls = trim($returnurls);
 185                 // We check that the return url matches a per-key regexp to prevent
 186                 // replay attacks (more exactly to force replay attacks to redirect
 187                 // the user to the real GroupeX website, which defeats the attack).
 188                 if (empty($returnurls) || @preg_match($returnurls, $gpex_url)) {
 189                     $returl = $gpex_url . gpex_make_params($gpex_challenge, $privkey, $datafields, $charset);
 190                     XDB::execute('UPDATE  group_auth
 191                                      SET  last_used = DATE(NOW())
 192                                    WHERE  name = {?}',
 193                                  $name);
 194
 195                     // Two conditions control access to the return URL:
 196                     // - If that URL is attached to a group:
 197                     //   - If the user belongs to the group, OK
 198                     //   - If the user is 'xnet' and doesn't belong, NOK
 199                     //   - If the user is not 'xnet' and the group is not 'strict', OK
 200                     //   - If the user is not 'xnet' and the group is 'strict', NOK
 201                     // - Otherwise, all but 'xnet' accounts may access the URL.
 202                     $user_is_xnet = S::user()->type == 'xnet';
 203                     $group_flags = new PlFlagSet($group_flags);
 204
 205                     // If this key is not attached to a group, but a group was
 206                     // requested (e.g query from wiki / blogs / ...), use the
 207                     // requested group_id.
 208                     if (!$group_id && $req_group_id) {
 209                         $group_id = $req_group_id;
 210                     }
 211
 212                     if ($group_id) {
 213                         // Check group permissions
 214                         $is_member = XDB::fetchOneCell('SELECT  COUNT(*)
 215                                                           FROM  group_members
 216                                                          WHERE  uid = {?} AND asso_id = {?}',
 217                                                          S::user()->id(), $group_id);
 218                         if (!$is_member && ($user_is_xnet || $group_flags->hasFlag('group_only'))) {
 219                             $page->kill("Le site demandé est réservé aux membres du groupe $group_name.");
 220                         }
 221
 222                     } else if ($user_is_xnet && !$group_flags->hasFlag('allow_xnet')) {
 223                         $page->kill("Le site demandé est réservé aux polytechniciens.");
 224                     }
 225
 226                     // If we logged in specifically for this 'external_auth' request
 227                     // and didn't want to "keep access to services", we kill the session
 228                     // just before returning.
 229                     // See classes/xorgsession.php:startSessionAs
 230                     if (S::b('external_auth_exit')) {
 231                         S::logger()->log('decconnexion', @$_SERVER['HTTP_REFERER']);
 232                         Platal::session()->killAccessCookie();
 233                         Platal::session()->destroy();
 234                     }
 235                     http_redirect($returl);
 236                 } else if (S::admin()) {
 237                     $page->kill("La requête d'authentification a échoué (url de retour invalide).");
 238                 }
 239             }
 240         }
 241
 242         // Otherwise (if no valid request was found, or if the return URL is not
 243         // acceptable), the user is redirected back to our homepage.
 244         pl_redirect('/');
 245     }
 246
 247     function handler_admin_authgroupesx($page, $action = 'list', $id = null)
 248     {
 249         $page->setTitle('Administration - Auth groupes X');
 250         $page->assign('title', 'Gestion de l\'authentification centralisée');
 251         $table_editor = new PLTableEditor('admin/auth-groupes-x','group_auth','id');
 252         $table_editor->describe('name','nom',true);
 253         $table_editor->describe('privkey','clé privée',false, true);
 254         $table_editor->describe('datafields','champs renvoyés',true);
 255         $table_editor->describe('returnurls','urls de retour',true);
 256         $table_editor->describe('last_used', 'dernière utilisation', true);
 257         $table_editor->apply($page, $action, $id);
 258     }
 259 }
 260
 261 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 262 ?>