includes/AuthPlugin.php

   1 <?php
   2 /**
   3  * Authentication plugin interface
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>
   6  * http://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 /**
  27  * Authentication plugin interface. Instantiate a subclass of AuthPlugin
  28  * and set $wgAuth to it to authenticate against some external tool.
  29  *
  30  * The default behavior is not to do anything, and use the local user
  31  * database for all authentication. A subclass can require that all
  32  * accounts authenticate externally, or use it only as a fallback; also
  33  * you can transparently create internal wiki accounts the first time
  34  * someone logs in who can be authenticated externally.
  35  */
  36 class AuthPlugin {
  37         /**
  38          * Check whether there exists a user account with the given name.
  39          * The name will be normalized to MediaWiki's requirements, so
  40          * you might need to munge it (for instance, for lowercase initial
  41          * letters).
  42          *
  43          * @param $username String: username.
  44          * @return bool
  45          */
  46         public function userExists( $username ) {
  47                 # Override this!
  48                 return false;
  49         }
  50
  51         /**
  52          * Check if a username+password pair is a valid login.
  53          * The name will be normalized to MediaWiki's requirements, so
  54          * you might need to munge it (for instance, for lowercase initial
  55          * letters).
  56          *
  57          * @param $username String: username.
  58          * @param $password String: user password.
  59          * @return bool
  60          */
  61         public function authenticate( $username, $password ) {
  62                 # Override this!
  63                 return false;
  64         }
  65
  66         /**
  67          * Modify options in the login template.
  68          *
  69          * @param $template UserLoginTemplate object.
  70          * @param $type String 'signup' or 'login'.
  71          */
  72         public function modifyUITemplate( &$template, &$type ) {
  73                 # Override this!
  74                 $template->set( 'usedomain', false );
  75         }
  76
  77         /**
  78          * Set the domain this plugin is supposed to use when authenticating.
  79          *
  80          * @param $domain String: authentication domain.
  81          */
  82         public function setDomain( $domain ) {
  83                 $this->domain = $domain;
  84         }
  85
  86         /**
  87          * Check to see if the specific domain is a valid domain.
  88          *
  89          * @param $domain String: authentication domain.
  90          * @return bool
  91          */
  92         public function validDomain( $domain ) {
  93                 # Override this!
  94                 return true;
  95         }
  96
  97         /**
  98          * When a user logs in, optionally fill in preferences and such.
  99          * For instance, you might pull the email address or real name from the
 100          * external user database.
 101          *
 102          * The User object is passed by reference so it can be modified; don't
 103          * forget the & on your function declaration.
 104          *
 105          * @param $user User object
 106          */
 107         public function updateUser( &$user ) {
 108                 # Override this and do something
 109                 return true;
 110         }
 111
 112         /**
 113          * Return true if the wiki should create a new local account automatically
 114          * when asked to login a user who doesn't exist locally but does in the
 115          * external auth database.
 116          *
 117          * If you don't automatically create accounts, you must still create
 118          * accounts in some way. It's not possible to authenticate without
 119          * a local account.
 120          *
 121          * This is just a question, and shouldn't perform any actions.
 122          *
 123          * @return Boolean
 124          */
 125         public function autoCreate() {
 126                 return false;
 127         }
 128
 129         /**
 130          * Allow a property change? Properties are the same as preferences
 131          * and use the same keys. 'Realname' 'Emailaddress' and 'Nickname'
 132          * all reference this.
 133          *
 134          * @param $prop string
 135          *
 136          * @return Boolean
 137          */
 138         public function allowPropChange( $prop = '' ) {
 139                 if ( $prop == 'realname' && is_callable( array( $this, 'allowRealNameChange' ) ) ) {
 140                         return $this->allowRealNameChange();
 141                 } elseif ( $prop == 'emailaddress' && is_callable( array( $this, 'allowEmailChange' ) ) ) {
 142                         return $this->allowEmailChange();
 143                 } elseif ( $prop == 'nickname' && is_callable( array( $this, 'allowNickChange' ) ) ) {
 144                         return $this->allowNickChange();
 145                 } else {
 146                         return true;
 147                 }
 148         }
 149
 150         /**
 151          * Can users change their passwords?
 152          *
 153          * @return bool
 154          */
 155         public function allowPasswordChange() {
 156                 return true;
 157         }
 158
 159         /**
 160          * Set the given password in the authentication database.
 161          * As a special case, the password may be set to null to request
 162          * locking the password to an unusable value, with the expectation
 163          * that it will be set later through a mail reset or other method.
 164          *
 165          * Return true if successful.
 166          *
 167          * @param $user User object.
 168          * @param $password String: password.
 169          * @return bool
 170          */
 171         public function setPassword( $user, $password ) {
 172                 return true;
 173         }
 174
 175         /**
 176          * Update user information in the external authentication database.
 177          * Return true if successful.
 178          *
 179          * @param $user User object.
 180          * @return Boolean
 181          */
 182         public function updateExternalDB( $user ) {
 183                 return true;
 184         }
 185
 186         /**
 187          * Check to see if external accounts can be created.
 188          * Return true if external accounts can be created.
 189          * @return Boolean
 190          */
 191         public function canCreateAccounts() {
 192                 return false;
 193         }
 194
 195         /**
 196          * Add a user to the external authentication database.
 197          * Return true if successful.
 198          *
 199          * @param $user User: only the name should be assumed valid at this point
 200          * @param $password String
 201          * @param $email String
 202          * @param $realname String
 203          * @return Boolean
 204          */
 205         public function addUser( $user, $password, $email = '', $realname = '' ) {
 206                 return true;
 207         }
 208
 209         /**
 210          * Return true to prevent logins that don't authenticate here from being
 211          * checked against the local database's password fields.
 212          *
 213          * This is just a question, and shouldn't perform any actions.
 214          *
 215          * @return Boolean
 216          */
 217         public function strict() {
 218                 return false;
 219         }
 220
 221         /**
 222          * Check if a user should authenticate locally if the global authentication fails.
 223          * If either this or strict() returns true, local authentication is not used.
 224          *
 225          * @param $username String: username.
 226          * @return Boolean
 227          */
 228         public function strictUserAuth( $username ) {
 229                 return false;
 230         }
 231
 232         /**
 233          * When creating a user account, optionally fill in preferences and such.
 234          * For instance, you might pull the email address or real name from the
 235          * external user database.
 236          *
 237          * The User object is passed by reference so it can be modified; don't
 238          * forget the & on your function declaration.
 239          *
 240          * @param $user User object.
 241          * @param $autocreate Boolean: True if user is being autocreated on login
 242          */
 243         public function initUser( &$user, $autocreate = false ) {
 244                 # Override this to do something.
 245         }
 246
 247         /**
 248          * If you want to munge the case of an account name before the final
 249          * check, now is your chance.
 250          */
 251         public function getCanonicalName( $username ) {
 252                 return $username;
 253         }
 254
 255         /**
 256          * Get an instance of a User object
 257          *
 258          * @param $user User
 259          *
 260          * @return AuthPluginUser
 261          */
 262         public function getUserInstance( User &$user ) {
 263                 return new AuthPluginUser( $user );
 264         }
 265 }
 266
 267 class AuthPluginUser {
 268         function __construct( $user ) {
 269                 # Override this!
 270         }
 271
 272         public function getId() {
 273                 # Override this!
 274                 return -1;
 275         }
 276
 277         public function isLocked() {
 278                 # Override this!
 279                 return false;
 280         }
 281
 282         public function isHidden() {
 283                 # Override this!
 284                 return false;
 285         }
 286
 287         public function resetAuthToken() {
 288                 # Override this!
 289                 return true;
 290         }
 291 }