includes/api/ApiAuthManagerHelper.php

   1 <?php
   2 /**
   3  * Copyright © 2016 Brad Jorsch <bjorsch@wikimedia.org>
   4  *
   5  * This program 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 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program 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 along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @since 1.27
  22  */
  23
  24 use MediaWiki\Auth\AuthManager;
  25 use MediaWiki\Auth\AuthenticationRequest;
  26 use MediaWiki\Auth\AuthenticationResponse;
  27 use MediaWiki\Auth\CreateFromLoginAuthenticationRequest;
  28 use MediaWiki\Logger\LoggerFactory;
  29
  30 /**
  31  * Helper class for AuthManager-using API modules. Intended for use via
  32  * composition.
  33  *
  34  * @ingroup API
  35  */
  36 class ApiAuthManagerHelper {
  37
  38         /** @var ApiBase API module, for context and parameters */
  39         private $module;
  40
  41         /** @var string Message output format */
  42         private $messageFormat;
  43
  44         /**
  45          * @param ApiBase $module API module, for context and parameters
  46          */
  47         public function __construct( ApiBase $module ) {
  48                 $this->module = $module;
  49
  50                 $params = $module->extractRequestParams();
  51                 $this->messageFormat = isset( $params['messageformat'] ) ? $params['messageformat'] : 'wikitext';
  52         }
  53
  54         /**
  55          * Static version of the constructor, for chaining
  56          * @param ApiBase $module API module, for context and parameters
  57          * @return ApiAuthManagerHelper
  58          */
  59         public static function newForModule( ApiBase $module ) {
  60                 return new self( $module );
  61         }
  62
  63         /**
  64          * Format a message for output
  65          * @param array &$res Result array
  66          * @param string $key Result key
  67          * @param Message $message
  68          */
  69         private function formatMessage( array &$res, $key, Message $message ) {
  70                 switch ( $this->messageFormat ) {
  71                         case 'none':
  72                                 break;
  73
  74                         case 'wikitext':
  75                                 $res[$key] = $message->setContext( $this->module )->text();
  76                                 break;
  77
  78                         case 'html':
  79                                 $res[$key] = $message->setContext( $this->module )->parseAsBlock();
  80                                 $res[$key] = Parser::stripOuterParagraph( $res[$key] );
  81                                 break;
  82
  83                         case 'raw':
  84                                 $res[$key] = [
  85                                         'key' => $message->getKey(),
  86                                         'params' => $message->getParams(),
  87                                 ];
  88                                 ApiResult::setIndexedTagName( $res[$key]['params'], 'param' );
  89                                 break;
  90                 }
  91         }
  92
  93         /**
  94          * Call $manager->securitySensitiveOperationStatus()
  95          * @param string $operation Operation being checked.
  96          * @throws ApiUsageException
  97          */
  98         public function securitySensitiveOperation( $operation ) {
  99                 $status = AuthManager::singleton()->securitySensitiveOperationStatus( $operation );
 100                 switch ( $status ) {
 101                         case AuthManager::SEC_OK:
 102                                 return;
 103
 104                         case AuthManager::SEC_REAUTH:
 105                                 $this->module->dieWithError( 'apierror-reauthenticate' );
 106
 107                         case AuthManager::SEC_FAIL:
 108                                 $this->module->dieWithError( 'apierror-cannotreauthenticate' );
 109
 110                         default:
 111                                 throw new UnexpectedValueException( "Unknown status \"$status\"" );
 112                 }
 113         }
 114
 115         /**
 116          * Filter out authentication requests by class name
 117          * @param AuthenticationRequest[] $reqs Requests to filter
 118          * @param string[] $blacklist Class names to remove
 119          * @return AuthenticationRequest[]
 120          */
 121         public static function blacklistAuthenticationRequests( array $reqs, array $blacklist ) {
 122                 if ( $blacklist ) {
 123                         $blacklist = array_flip( $blacklist );
 124                         $reqs = array_filter( $reqs, function ( $req ) use ( $blacklist ) {
 125                                 return !isset( $blacklist[get_class( $req )] );
 126                         } );
 127                 }
 128                 return $reqs;
 129         }
 130
 131         /**
 132          * Fetch and load the AuthenticationRequests for an action
 133          * @param string $action One of the AuthManager::ACTION_* constants
 134          * @return AuthenticationRequest[]
 135          */
 136         public function loadAuthenticationRequests( $action ) {
 137                 $params = $this->module->extractRequestParams();
 138
 139                 $manager = AuthManager::singleton();
 140                 $reqs = $manager->getAuthenticationRequests( $action, $this->module->getUser() );
 141
 142                 // Filter requests, if requested to do so
 143                 $wantedRequests = null;
 144                 if ( isset( $params['requests'] ) ) {
 145                         $wantedRequests = array_flip( $params['requests'] );
 146                 } elseif ( isset( $params['request'] ) ) {
 147                         $wantedRequests = [ $params['request'] => true ];
 148                 }
 149                 if ( $wantedRequests !== null ) {
 150                         $reqs = array_filter( $reqs, function ( $req ) use ( $wantedRequests ) {
 151                                 return isset( $wantedRequests[$req->getUniqueId()] );
 152                         } );
 153                 }
 154
 155                 // Collect the fields for all the requests
 156                 $fields = [];
 157                 $sensitive = [];
 158                 foreach ( $reqs as $req ) {
 159                         $info = (array)$req->getFieldInfo();
 160                         $fields += $info;
 161                         $sensitive += array_filter( $info, function ( $opts ) {
 162                                 return !empty( $opts['sensitive'] );
 163                         } );
 164                 }
 165
 166                 // Extract the request data for the fields and mark those request
 167                 // parameters as used
 168                 $data = array_intersect_key( $this->module->getRequest()->getValues(), $fields );
 169                 $this->module->getMain()->markParamsUsed( array_keys( $data ) );
 170
 171                 if ( $sensitive ) {
 172                         $this->module->requirePostedParameters( array_keys( $sensitive ), 'noprefix' );
 173                 }
 174
 175                 return AuthenticationRequest::loadRequestsFromSubmission( $reqs, $data );
 176         }
 177
 178         /**
 179          * Format an AuthenticationResponse for return
 180          * @param AuthenticationResponse $res
 181          * @return array
 182          */
 183         public function formatAuthenticationResponse( AuthenticationResponse $res ) {
 184                 $ret = [
 185                         'status' => $res->status,
 186                 ];
 187
 188                 if ( $res->status === AuthenticationResponse::PASS && $res->username !== null ) {
 189                         $ret['username'] = $res->username;
 190                 }
 191
 192                 if ( $res->status === AuthenticationResponse::REDIRECT ) {
 193                         $ret['redirecttarget'] = $res->redirectTarget;
 194                         if ( $res->redirectApiData !== null ) {
 195                                 $ret['redirectdata'] = $res->redirectApiData;
 196                         }
 197                 }
 198
 199                 if ( $res->status === AuthenticationResponse::REDIRECT ||
 200                         $res->status === AuthenticationResponse::UI ||
 201                         $res->status === AuthenticationResponse::RESTART
 202                 ) {
 203                         $ret += $this->formatRequests( $res->neededRequests );
 204                 }
 205
 206                 if ( $res->status === AuthenticationResponse::FAIL ||
 207                         $res->status === AuthenticationResponse::UI ||
 208                         $res->status === AuthenticationResponse::RESTART
 209                 ) {
 210                         $this->formatMessage( $ret, 'message', $res->message );
 211                 }
 212
 213                 if ( $res->status === AuthenticationResponse::FAIL ||
 214                         $res->status === AuthenticationResponse::RESTART
 215                 ) {
 216                         $this->module->getRequest()->getSession()->set(
 217                                 'ApiAuthManagerHelper::createRequest',
 218                                 $res->createRequest
 219                         );
 220                         $ret['canpreservestate'] = $res->createRequest !== null;
 221                 } else {
 222                         $this->module->getRequest()->getSession()->remove( 'ApiAuthManagerHelper::createRequest' );
 223                 }
 224
 225                 return $ret;
 226         }
 227
 228         /**
 229          * Logs successful or failed authentication.
 230          * @param string|AuthenticationResponse $result Response or error message
 231          * @param string $event Event type (e.g. 'accountcreation')
 232          */
 233         public function logAuthenticationResult( $event, $result ) {
 234                 if ( is_string( $result ) ) {
 235                         $status = Status::newFatal( $result );
 236                 } elseif ( $result->status === AuthenticationResponse::PASS ) {
 237                         $status = Status::newGood();
 238                 } elseif ( $result->status === AuthenticationResponse::FAIL ) {
 239                         $status = Status::newFatal( $result->message );
 240                 } else {
 241                         return;
 242                 }
 243
 244                 $module = $this->module->getModuleName();
 245                 LoggerFactory::getInstance( 'authevents' )->info( "$module API attempt", [
 246                         'event' => $event,
 247                         'status' => $status,
 248                         'module' => $module,
 249                 ] );
 250         }
 251
 252         /**
 253          * Fetch the preserved CreateFromLoginAuthenticationRequest, if any
 254          * @return CreateFromLoginAuthenticationRequest|null
 255          */
 256         public function getPreservedRequest() {
 257                 $ret = $this->module->getRequest()->getSession()->get( 'ApiAuthManagerHelper::createRequest' );
 258                 return $ret instanceof CreateFromLoginAuthenticationRequest ? $ret : null;
 259         }
 260
 261         /**
 262          * Format an array of AuthenticationRequests for return
 263          * @param AuthenticationRequest[] $reqs
 264          * @return array Will have a 'requests' key, and also 'fields' if $module's
 265          *  params include 'mergerequestfields'.
 266          */
 267         public function formatRequests( array $reqs ) {
 268                 $params = $this->module->extractRequestParams();
 269                 $mergeFields = !empty( $params['mergerequestfields'] );
 270
 271                 $ret = [ 'requests' => [] ];
 272                 foreach ( $reqs as $req ) {
 273                         $describe = $req->describeCredentials();
 274                         $reqInfo = [
 275                                 'id' => $req->getUniqueId(),
 276                                 'metadata' => $req->getMetadata() + [ ApiResult::META_TYPE => 'assoc' ],
 277                         ];
 278                         switch ( $req->required ) {
 279                                 case AuthenticationRequest::OPTIONAL:
 280                                         $reqInfo['required'] = 'optional';
 281                                         break;
 282                                 case AuthenticationRequest::REQUIRED:
 283                                         $reqInfo['required'] = 'required';
 284                                         break;
 285                                 case AuthenticationRequest::PRIMARY_REQUIRED:
 286                                         $reqInfo['required'] = 'primary-required';
 287                                         break;
 288                         }
 289                         $this->formatMessage( $reqInfo, 'provider', $describe['provider'] );
 290                         $this->formatMessage( $reqInfo, 'account', $describe['account'] );
 291                         if ( !$mergeFields ) {
 292                                 $reqInfo['fields'] = $this->formatFields( (array)$req->getFieldInfo() );
 293                         }
 294                         $ret['requests'][] = $reqInfo;
 295                 }
 296
 297                 if ( $mergeFields ) {
 298                         $fields = AuthenticationRequest::mergeFieldInfo( $reqs );
 299                         $ret['fields'] = $this->formatFields( $fields );
 300                 }
 301
 302                 return $ret;
 303         }
 304
 305         /**
 306          * Clean up a field array for output
 307          * @param ApiBase $module For context and parameters 'mergerequestfields'
 308          *  and 'messageformat'
 309          * @param array $fields
 310          * @return array
 311          */
 312         private function formatFields( array $fields ) {
 313                 static $copy = [
 314                         'type' => true,
 315                         'value' => true,
 316                 ];
 317
 318                 $module = $this->module;
 319                 $retFields = [];
 320
 321                 foreach ( $fields as $name => $field ) {
 322                         $ret = array_intersect_key( $field, $copy );
 323
 324                         if ( isset( $field['options'] ) ) {
 325                                 $ret['options'] = array_map( function ( $msg ) use ( $module ) {
 326                                         return $msg->setContext( $module )->plain();
 327                                 }, $field['options'] );
 328                                 ApiResult::setArrayType( $ret['options'], 'assoc' );
 329                         }
 330                         $this->formatMessage( $ret, 'label', $field['label'] );
 331                         $this->formatMessage( $ret, 'help', $field['help'] );
 332                         $ret['optional'] = !empty( $field['optional'] );
 333                         $ret['sensitive'] = !empty( $field['sensitive'] );
 334
 335                         $retFields[$name] = $ret;
 336                 }
 337
 338                 ApiResult::setArrayType( $retFields, 'assoc' );
 339
 340                 return $retFields;
 341         }
 342
 343         /**
 344          * Fetch the standard parameters this helper recognizes
 345          * @param string $action AuthManager action
 346          * @param string $param... Parameters to use
 347          * @return array
 348          */
 349         public static function getStandardParams( $action, $param /* ... */ ) {
 350                 $params = [
 351                         'requests' => [
 352                                 ApiBase::PARAM_TYPE => 'string',
 353                                 ApiBase::PARAM_ISMULTI => true,
 354                                 ApiBase::PARAM_HELP_MSG => [ 'api-help-authmanagerhelper-requests', $action ],
 355                         ],
 356                         'request' => [
 357                                 ApiBase::PARAM_TYPE => 'string',
 358                                 ApiBase::PARAM_REQUIRED => true,
 359                                 ApiBase::PARAM_HELP_MSG => [ 'api-help-authmanagerhelper-request', $action ],
 360                         ],
 361                         'messageformat' => [
 362                                 ApiBase::PARAM_DFLT => 'wikitext',
 363                                 ApiBase::PARAM_TYPE => [ 'html', 'wikitext', 'raw', 'none' ],
 364                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-messageformat',
 365                         ],
 366                         'mergerequestfields' => [
 367                                 ApiBase::PARAM_DFLT => false,
 368                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-mergerequestfields',
 369                         ],
 370                         'preservestate' => [
 371                                 ApiBase::PARAM_DFLT => false,
 372                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-preservestate',
 373                         ],
 374                         'returnurl' => [
 375                                 ApiBase::PARAM_TYPE => 'string',
 376                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-returnurl',
 377                         ],
 378                         'continue' => [
 379                                 ApiBase::PARAM_DFLT => false,
 380                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-continue',
 381                         ],
 382                 ];
 383
 384                 $ret = [];
 385                 $wantedParams = func_get_args();
 386                 array_shift( $wantedParams );
 387                 foreach ( $wantedParams as $name ) {
 388                         if ( isset( $params[$name] ) ) {
 389                                 $ret[$name] = $params[$name];
 390                         }
 391                 }
 392                 return $ret;
 393         }
 394 }