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 UsageException
  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->dieUsage(
 106                                         'You have not authenticated recently in this session, please reauthenticate.', 'reauthenticate'
 107                                 );
 108
 109                         case AuthManager::SEC_FAIL:
 110                                 $this->module->dieUsage(
 111                                         'This action is not available as your identify cannot be verified.', 'cannotreauthenticate'
 112                                 );
 113
 114                         default:
 115                                 throw new UnexpectedValueException( "Unknown status \"$status\"" );
 116                 }
 117         }
 118
 119         /**
 120          * Filter out authentication requests by class name
 121          * @param AuthenticationRequest[] $reqs Requests to filter
 122          * @param string[] $blacklist Class names to remove
 123          * @return AuthenticationRequest[]
 124          */
 125         public static function blacklistAuthenticationRequests( array $reqs, array $blacklist ) {
 126                 if ( $blacklist ) {
 127                         $blacklist = array_flip( $blacklist );
 128                         $reqs = array_filter( $reqs, function ( $req ) use ( $blacklist ) {
 129                                 return !isset( $blacklist[get_class( $req )] );
 130                         } );
 131                 }
 132                 return $reqs;
 133         }
 134
 135         /**
 136          * Fetch and load the AuthenticationRequests for an action
 137          * @param string $action One of the AuthManager::ACTION_* constants
 138          * @return AuthenticationRequest[]
 139          */
 140         public function loadAuthenticationRequests( $action ) {
 141                 $params = $this->module->extractRequestParams();
 142
 143                 $manager = AuthManager::singleton();
 144                 $reqs = $manager->getAuthenticationRequests( $action, $this->module->getUser() );
 145
 146                 // Filter requests, if requested to do so
 147                 $wantedRequests = null;
 148                 if ( isset( $params['requests'] ) ) {
 149                         $wantedRequests = array_flip( $params['requests'] );
 150                 } elseif ( isset( $params['request'] ) ) {
 151                         $wantedRequests = [ $params['request'] => true ];
 152                 }
 153                 if ( $wantedRequests !== null ) {
 154                         $reqs = array_filter( $reqs, function ( $req ) use ( $wantedRequests ) {
 155                                 return isset( $wantedRequests[$req->getUniqueId()] );
 156                         } );
 157                 }
 158
 159                 // Collect the fields for all the requests
 160                 $fields = [];
 161                 $sensitive = [];
 162                 foreach ( $reqs as $req ) {
 163                         $info = (array)$req->getFieldInfo();
 164                         $fields += $info;
 165                         $sensitive += array_filter( $info, function ( $opts ) {
 166                                 return !empty( $opts['sensitive'] );
 167                         } );
 168                 }
 169
 170                 // Extract the request data for the fields and mark those request
 171                 // parameters as used
 172                 $data = array_intersect_key( $this->module->getRequest()->getValues(), $fields );
 173                 $this->module->getMain()->markParamsUsed( array_keys( $data ) );
 174
 175                 if ( $sensitive ) {
 176                         try {
 177                                 $this->module->requirePostedParameters( array_keys( $sensitive ), 'noprefix' );
 178                         } catch ( UsageException $ex ) {
 179                                 // Make this a warning for now, upgrade to an error in 1.29.
 180                                 $this->module->setWarning( $ex->getMessage() );
 181                                 $this->module->logFeatureUsage( $this->module->getModuleName() . '-params-in-query-string' );
 182                         }
 183                 }
 184
 185                 return AuthenticationRequest::loadRequestsFromSubmission( $reqs, $data );
 186         }
 187
 188         /**
 189          * Format an AuthenticationResponse for return
 190          * @param AuthenticationResponse $res
 191          * @return array
 192          */
 193         public function formatAuthenticationResponse( AuthenticationResponse $res ) {
 194                 $ret = [
 195                         'status' => $res->status,
 196                 ];
 197
 198                 if ( $res->status === AuthenticationResponse::PASS && $res->username !== null ) {
 199                         $ret['username'] = $res->username;
 200                 }
 201
 202                 if ( $res->status === AuthenticationResponse::REDIRECT ) {
 203                         $ret['redirecttarget'] = $res->redirectTarget;
 204                         if ( $res->redirectApiData !== null ) {
 205                                 $ret['redirectdata'] = $res->redirectApiData;
 206                         }
 207                 }
 208
 209                 if ( $res->status === AuthenticationResponse::REDIRECT ||
 210                         $res->status === AuthenticationResponse::UI ||
 211                         $res->status === AuthenticationResponse::RESTART
 212                 ) {
 213                         $ret += $this->formatRequests( $res->neededRequests );
 214                 }
 215
 216                 if ( $res->status === AuthenticationResponse::FAIL ||
 217                         $res->status === AuthenticationResponse::UI ||
 218                         $res->status === AuthenticationResponse::RESTART
 219                 ) {
 220                         $this->formatMessage( $ret, 'message', $res->message );
 221                 }
 222
 223                 if ( $res->status === AuthenticationResponse::FAIL ||
 224                         $res->status === AuthenticationResponse::RESTART
 225                 ) {
 226                         $this->module->getRequest()->getSession()->set(
 227                                 'ApiAuthManagerHelper::createRequest',
 228                                 $res->createRequest
 229                         );
 230                         $ret['canpreservestate'] = $res->createRequest !== null;
 231                 } else {
 232                         $this->module->getRequest()->getSession()->remove( 'ApiAuthManagerHelper::createRequest' );
 233                 }
 234
 235                 return $ret;
 236         }
 237
 238         /**
 239          * Logs successful or failed authentication.
 240          * @param string|AuthenticationResponse $result Response or error message
 241          * @param string $event Event type (e.g. 'accountcreation')
 242          */
 243         public function logAuthenticationResult( $event, $result ) {
 244                 if ( is_string( $result ) ) {
 245                         $status = Status::newFatal( $result );
 246                 } elseif ( $result->status === AuthenticationResponse::PASS ) {
 247                         $status = Status::newGood();
 248                 } elseif ( $result->status === AuthenticationResponse::FAIL ) {
 249                         $status = Status::newFatal( $result->message );
 250                 } else {
 251                         return;
 252                 }
 253
 254                 $module = $this->module->getModuleName();
 255                 LoggerFactory::getInstance( 'authevents' )->info( "$module API attempt", [
 256                         'event' => $event,
 257                         'status' => $status,
 258                         'module' => $module,
 259                 ] );
 260         }
 261
 262         /**
 263          * Fetch the preserved CreateFromLoginAuthenticationRequest, if any
 264          * @return CreateFromLoginAuthenticationRequest|null
 265          */
 266         public function getPreservedRequest() {
 267                 $ret = $this->module->getRequest()->getSession()->get( 'ApiAuthManagerHelper::createRequest' );
 268                 return $ret instanceof CreateFromLoginAuthenticationRequest ? $ret : null;
 269         }
 270
 271         /**
 272          * Format an array of AuthenticationRequests for return
 273          * @param AuthenticationRequest[] $reqs
 274          * @return array Will have a 'requests' key, and also 'fields' if $module's
 275          *  params include 'mergerequestfields'.
 276          */
 277         public function formatRequests( array $reqs ) {
 278                 $params = $this->module->extractRequestParams();
 279                 $mergeFields = !empty( $params['mergerequestfields'] );
 280
 281                 $ret = [ 'requests' => [] ];
 282                 foreach ( $reqs as $req ) {
 283                         $describe = $req->describeCredentials();
 284                         $reqInfo = [
 285                                 'id' => $req->getUniqueId(),
 286                                 'metadata' => $req->getMetadata() + [ ApiResult::META_TYPE => 'assoc' ],
 287                         ];
 288                         switch ( $req->required ) {
 289                                 case AuthenticationRequest::OPTIONAL:
 290                                         $reqInfo['required'] = 'optional';
 291                                         break;
 292                                 case AuthenticationRequest::REQUIRED:
 293                                         $reqInfo['required'] = 'required';
 294                                         break;
 295                                 case AuthenticationRequest::PRIMARY_REQUIRED:
 296                                         $reqInfo['required'] = 'primary-required';
 297                                         break;
 298                         }
 299                         $this->formatMessage( $reqInfo, 'provider', $describe['provider'] );
 300                         $this->formatMessage( $reqInfo, 'account', $describe['account'] );
 301                         if ( !$mergeFields ) {
 302                                 $reqInfo['fields'] = $this->formatFields( (array)$req->getFieldInfo() );
 303                         }
 304                         $ret['requests'][] = $reqInfo;
 305                 }
 306
 307                 if ( $mergeFields ) {
 308                         $fields = AuthenticationRequest::mergeFieldInfo( $reqs );
 309                         $ret['fields'] = $this->formatFields( $fields );
 310                 }
 311
 312                 return $ret;
 313         }
 314
 315         /**
 316          * Clean up a field array for output
 317          * @param ApiBase $module For context and parameters 'mergerequestfields'
 318          *  and 'messageformat'
 319          * @param array $fields
 320          * @return array
 321          */
 322         private function formatFields( array $fields ) {
 323                 static $copy = [
 324                         'type' => true,
 325                         'value' => true,
 326                 ];
 327
 328                 $module = $this->module;
 329                 $retFields = [];
 330
 331                 foreach ( $fields as $name => $field ) {
 332                         $ret = array_intersect_key( $field, $copy );
 333
 334                         if ( isset( $field['options'] ) ) {
 335                                 $ret['options'] = array_map( function ( $msg ) use ( $module ) {
 336                                         return $msg->setContext( $module )->plain();
 337                                 }, $field['options'] );
 338                                 ApiResult::setArrayType( $ret['options'], 'assoc' );
 339                         }
 340                         $this->formatMessage( $ret, 'label', $field['label'] );
 341                         $this->formatMessage( $ret, 'help', $field['help'] );
 342                         $ret['optional'] = !empty( $field['optional'] );
 343                         $ret['sensitive'] = !empty( $field['sensitive'] );
 344
 345                         $retFields[$name] = $ret;
 346                 }
 347
 348                 ApiResult::setArrayType( $retFields, 'assoc' );
 349
 350                 return $retFields;
 351         }
 352
 353         /**
 354          * Fetch the standard parameters this helper recognizes
 355          * @param string $action AuthManager action
 356          * @param string $param... Parameters to use
 357          * @return array
 358          */
 359         public static function getStandardParams( $action, $param /* ... */ ) {
 360                 $params = [
 361                         'requests' => [
 362                                 ApiBase::PARAM_TYPE => 'string',
 363                                 ApiBase::PARAM_ISMULTI => true,
 364                                 ApiBase::PARAM_HELP_MSG => [ 'api-help-authmanagerhelper-requests', $action ],
 365                         ],
 366                         'request' => [
 367                                 ApiBase::PARAM_TYPE => 'string',
 368                                 ApiBase::PARAM_REQUIRED => true,
 369                                 ApiBase::PARAM_HELP_MSG => [ 'api-help-authmanagerhelper-request', $action ],
 370                         ],
 371                         'messageformat' => [
 372                                 ApiBase::PARAM_DFLT => 'wikitext',
 373                                 ApiBase::PARAM_TYPE => [ 'html', 'wikitext', 'raw', 'none' ],
 374                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-messageformat',
 375                         ],
 376                         'mergerequestfields' => [
 377                                 ApiBase::PARAM_DFLT => false,
 378                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-mergerequestfields',
 379                         ],
 380                         'preservestate' => [
 381                                 ApiBase::PARAM_DFLT => false,
 382                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-preservestate',
 383                         ],
 384                         'returnurl' => [
 385                                 ApiBase::PARAM_TYPE => 'string',
 386                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-returnurl',
 387                         ],
 388                         'continue' => [
 389                                 ApiBase::PARAM_DFLT => false,
 390                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-continue',
 391                         ],
 392                 ];
 393
 394                 $ret = [];
 395                 $wantedParams = func_get_args();
 396                 array_shift( $wantedParams );
 397                 foreach ( $wantedParams as $name ) {
 398                         if ( isset( $params[$name] ) ) {
 399                                 $ret[$name] = $params[$name];
 400                         }
 401                 }
 402                 return $ret;
 403         }
 404 }