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                                 break;
  89                 }
  90         }
  91
  92         /**
  93          * Call $manager->securitySensitiveOperationStatus()
  94          * @param string $operation Operation being checked.
  95          * @throws UsageException
  96          */
  97         public function securitySensitiveOperation( $operation ) {
  98                 $status = AuthManager::singleton()->securitySensitiveOperationStatus( $operation );
  99                 switch ( $status ) {
 100                         case AuthManager::SEC_OK:
 101                                 return;
 102
 103                         case AuthManager::SEC_REAUTH:
 104                                 $this->module->dieUsage(
 105                                         'You have not authenticated recently in this session, please reauthenticate.', 'reauthenticate'
 106                                 );
 107
 108                         case AuthManager::SEC_FAIL:
 109                                 $this->module->dieUsage(
 110                                         'This action is not available as your identify cannot be verified.', 'cannotreauthenticate'
 111                                 );
 112
 113                         default:
 114                                 throw new UnexpectedValueException( "Unknown status \"$status\"" );
 115                 }
 116         }
 117
 118         /**
 119          * Filter out authentication requests by class name
 120          * @param AuthenticationRequest[] $reqs Requests to filter
 121          * @param string[] $blacklist Class names to remove
 122          * @return AuthenticationRequest[]
 123          */
 124         public static function blacklistAuthenticationRequests( array $reqs, array $blacklist ) {
 125                 if ( $blacklist ) {
 126                         $blacklist = array_flip( $blacklist );
 127                         $reqs = array_filter( $reqs, function ( $req ) use ( $blacklist ) {
 128                                 return !isset( $blacklist[get_class( $req )] );
 129                         } );
 130                 }
 131                 return $reqs;
 132         }
 133
 134         /**
 135          * Fetch and load the AuthenticationRequests for an action
 136          * @param string $action One of the AuthManager::ACTION_* constants
 137          * @return AuthenticationRequest[]
 138          */
 139         public function loadAuthenticationRequests( $action ) {
 140                 $params = $this->module->extractRequestParams();
 141
 142                 $manager = AuthManager::singleton();
 143                 $reqs = $manager->getAuthenticationRequests( $action, $this->module->getUser() );
 144
 145                 // Filter requests, if requested to do so
 146                 $wantedRequests = null;
 147                 if ( isset( $params['requests'] ) ) {
 148                         $wantedRequests = array_flip( $params['requests'] );
 149                 } elseif ( isset( $params['request'] ) ) {
 150                         $wantedRequests = [ $params['request'] => true ];
 151                 }
 152                 if ( $wantedRequests !== null ) {
 153                         $reqs = array_filter( $reqs, function ( $req ) use ( $wantedRequests ) {
 154                                 return isset( $wantedRequests[$req->getUniqueId()] );
 155                         } );
 156                 }
 157
 158                 // Collect the fields for all the requests
 159                 $fields = [];
 160                 $sensitive = [];
 161                 foreach ( $reqs as $req ) {
 162                         $info = (array)$req->getFieldInfo();
 163                         $fields += $info;
 164                         $sensitive += array_filter( $info, function ( $opts ) {
 165                                 return !empty( $opts['sensitive'] );
 166                         } );
 167                 }
 168
 169                 // Extract the request data for the fields and mark those request
 170                 // parameters as used
 171                 $data = array_intersect_key( $this->module->getRequest()->getValues(), $fields );
 172                 $this->module->getMain()->markParamsUsed( array_keys( $data ) );
 173
 174                 if ( $sensitive ) {
 175                         try {
 176                                 $this->module->requirePostedParameters( array_keys( $sensitive ), 'noprefix' );
 177                         } catch ( UsageException $ex ) {
 178                                 // Make this a warning for now, upgrade to an error in 1.29.
 179                                 $this->module->setWarning( $ex->getMessage() );
 180                                 $this->module->logFeatureUsage( $this->module->getModuleName() . '-params-in-query-string' );
 181                         }
 182                 }
 183
 184                 return AuthenticationRequest::loadRequestsFromSubmission( $reqs, $data );
 185         }
 186
 187         /**
 188          * Format an AuthenticationResponse for return
 189          * @param AuthenticationResponse $res
 190          * @return array
 191          */
 192         public function formatAuthenticationResponse( AuthenticationResponse $res ) {
 193                 $params = $this->module->extractRequestParams();
 194
 195                 $ret = [
 196                         'status' => $res->status,
 197                 ];
 198
 199                 if ( $res->status === AuthenticationResponse::PASS && $res->username !== null ) {
 200                         $ret['username'] = $res->username;
 201                 }
 202
 203                 if ( $res->status === AuthenticationResponse::REDIRECT ) {
 204                         $ret['redirecttarget'] = $res->redirectTarget;
 205                         if ( $res->redirectApiData !== null ) {
 206                                 $ret['redirectdata'] = $res->redirectApiData;
 207                         }
 208                 }
 209
 210                 if ( $res->status === AuthenticationResponse::REDIRECT ||
 211                         $res->status === AuthenticationResponse::UI ||
 212                         $res->status === AuthenticationResponse::RESTART
 213                 ) {
 214                         $ret += $this->formatRequests( $res->neededRequests );
 215                 }
 216
 217                 if ( $res->status === AuthenticationResponse::FAIL ||
 218                         $res->status === AuthenticationResponse::UI ||
 219                         $res->status === AuthenticationResponse::RESTART
 220                 ) {
 221                         $this->formatMessage( $ret, 'message', $res->message );
 222                 }
 223
 224                 if ( $res->status === AuthenticationResponse::FAIL ||
 225                         $res->status === AuthenticationResponse::RESTART
 226                 ) {
 227                         $this->module->getRequest()->getSession()->set(
 228                                 'ApiAuthManagerHelper::createRequest',
 229                                 $res->createRequest
 230                         );
 231                         $ret['canpreservestate'] = $res->createRequest !== null;
 232                 } else {
 233                         $this->module->getRequest()->getSession()->remove( 'ApiAuthManagerHelper::createRequest' );
 234                 }
 235
 236                 return $ret;
 237         }
 238
 239         /**
 240          * Logs successful or failed authentication.
 241          * @param string|AuthenticationResponse $result Response or error message
 242          * @param string $event Event type (e.g. 'accountcreation')
 243          */
 244         public function logAuthenticationResult( $event, $result ) {
 245                 if ( is_string( $result ) ) {
 246                         $status = Status::newFatal( $result );
 247                 } elseif ( $result->status === AuthenticationResponse::PASS ) {
 248                         $status = Status::newGood();
 249                 } elseif ( $result->status === AuthenticationResponse::FAIL ) {
 250                         $status = Status::newFatal( $result->message );
 251                 } else {
 252                         return;
 253                 }
 254
 255                 $module = $this->module->getModuleName();
 256                 LoggerFactory::getInstance( 'authevents' )->info( "$module API attempt", [
 257                         'event' => $event,
 258                         'status' => $status,
 259                         'module' => $module,
 260                 ] );
 261         }
 262
 263         /**
 264          * Fetch the preserved CreateFromLoginAuthenticationRequest, if any
 265          * @return CreateFromLoginAuthenticationRequest|null
 266          */
 267         public function getPreservedRequest() {
 268                 $ret = $this->module->getRequest()->getSession()->get( 'ApiAuthManagerHelper::createRequest' );
 269                 return $ret instanceof CreateFromLoginAuthenticationRequest ? $ret : null;
 270         }
 271
 272         /**
 273          * Format an array of AuthenticationRequests for return
 274          * @param AuthenticationRequest[] $reqs
 275          * @return array Will have a 'requests' key, and also 'fields' if $module's
 276          *  params include 'mergerequestfields'.
 277          */
 278         public function formatRequests( array $reqs ) {
 279                 $params = $this->module->extractRequestParams();
 280                 $mergeFields = !empty( $params['mergerequestfields'] );
 281
 282                 $ret = [ 'requests' => [] ];
 283                 foreach ( $reqs as $req ) {
 284                         $describe = $req->describeCredentials();
 285                         $reqInfo = [
 286                                 'id' => $req->getUniqueId(),
 287                                 'metadata' => $req->getMetadata() + [ ApiResult::META_TYPE => 'assoc' ],
 288                         ];
 289                         switch ( $req->required ) {
 290                                 case AuthenticationRequest::OPTIONAL:
 291                                         $reqInfo['required'] = 'optional';
 292                                         break;
 293                                 case AuthenticationRequest::REQUIRED:
 294                                         $reqInfo['required'] = 'required';
 295                                         break;
 296                                 case AuthenticationRequest::PRIMARY_REQUIRED:
 297                                         $reqInfo['required'] = 'primary-required';
 298                                         break;
 299                         }
 300                         $this->formatMessage( $reqInfo, 'provider', $describe['provider'] );
 301                         $this->formatMessage( $reqInfo, 'account', $describe['account'] );
 302                         if ( !$mergeFields ) {
 303                                 $reqInfo['fields'] = $this->formatFields( (array)$req->getFieldInfo() );
 304                         }
 305                         $ret['requests'][] = $reqInfo;
 306                 }
 307
 308                 if ( $mergeFields ) {
 309                         $fields = AuthenticationRequest::mergeFieldInfo( $reqs );
 310                         $ret['fields'] = $this->formatFields( $fields );
 311                 }
 312
 313                 return $ret;
 314         }
 315
 316         /**
 317          * Clean up a field array for output
 318          * @param ApiBase $module For context and parameters 'mergerequestfields'
 319          *  and 'messageformat'
 320          * @param array $fields
 321          * @return array
 322          */
 323         private function formatFields( array $fields ) {
 324                 static $copy = [
 325                         'type' => true,
 326                         'value' => true,
 327                 ];
 328
 329                 $module = $this->module;
 330                 $retFields = [];
 331
 332                 foreach ( $fields as $name => $field ) {
 333                         $ret = array_intersect_key( $field, $copy );
 334
 335                         if ( isset( $field['options'] ) ) {
 336                                 $ret['options'] = array_map( function ( $msg ) use ( $module ) {
 337                                         return $msg->setContext( $module )->plain();
 338                                 }, $field['options'] );
 339                                 ApiResult::setArrayType( $ret['options'], 'assoc' );
 340                         }
 341                         $this->formatMessage( $ret, 'label', $field['label'] );
 342                         $this->formatMessage( $ret, 'help', $field['help'] );
 343                         $ret['optional'] = !empty( $field['optional'] );
 344                         $ret['sensitive'] = !empty( $field['sensitive'] );
 345
 346                         $retFields[$name] = $ret;
 347                 }
 348
 349                 ApiResult::setArrayType( $retFields, 'assoc' );
 350
 351                 return $retFields;
 352         }
 353
 354         /**
 355          * Fetch the standard parameters this helper recognizes
 356          * @param string $action AuthManager action
 357          * @param string $param... Parameters to use
 358          * @return array
 359          */
 360         public static function getStandardParams( $action, $param /* ... */ ) {
 361                 $params = [
 362                         'requests' => [
 363                                 ApiBase::PARAM_TYPE => 'string',
 364                                 ApiBase::PARAM_ISMULTI => true,
 365                                 ApiBase::PARAM_HELP_MSG => [ 'api-help-authmanagerhelper-requests', $action ],
 366                         ],
 367                         'request' => [
 368                                 ApiBase::PARAM_TYPE => 'string',
 369                                 ApiBase::PARAM_REQUIRED => true,
 370                                 ApiBase::PARAM_HELP_MSG => [ 'api-help-authmanagerhelper-request', $action ],
 371                         ],
 372                         'messageformat' => [
 373                                 ApiBase::PARAM_DFLT => 'wikitext',
 374                                 ApiBase::PARAM_TYPE => [ 'html', 'wikitext', 'raw', 'none' ],
 375                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-messageformat',
 376                         ],
 377                         'mergerequestfields' => [
 378                                 ApiBase::PARAM_DFLT => false,
 379                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-mergerequestfields',
 380                         ],
 381                         'preservestate' => [
 382                                 ApiBase::PARAM_DFLT => false,
 383                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-preservestate',
 384                         ],
 385                         'returnurl' => [
 386                                 ApiBase::PARAM_TYPE => 'string',
 387                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-returnurl',
 388                         ],
 389                         'continue' => [
 390                                 ApiBase::PARAM_DFLT => false,
 391                                 ApiBase::PARAM_HELP_MSG => 'api-help-authmanagerhelper-continue',
 392                         ],
 393                 ];
 394
 395                 $ret = [];
 396                 $wantedParams = func_get_args();
 397                 array_shift( $wantedParams );
 398                 foreach ( $wantedParams as $name ) {
 399                         if ( isset( $params[$name] ) ) {
 400                                 $ret[$name] = $params[$name];
 401                         }
 402                 }
 403                 return $ret;
 404         }
 405 }