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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\OAuth\Rest\Handler; |
| 4 | |
| 5 | use Exception; |
| 6 | use GuzzleHttp\Psr7\ServerRequest; |
| 7 | use League\OAuth2\Server\Entities\ScopeEntityInterface; |
| 8 | use League\OAuth2\Server\Exception\OAuthServerException; |
| 9 | use League\OAuth2\Server\RequestTypes\AuthorizationRequest; |
| 10 | use MediaWiki\Extension\OAuth\AuthorizationProvider\Grant\AuthorizationCodeAuthorization; |
| 11 | use MediaWiki\Extension\OAuth\Entity\ClientEntity; |
| 12 | use MediaWiki\Extension\OAuth\Entity\UserEntity; |
| 13 | use MediaWiki\Extension\OAuth\Exception\ClientApprovalDenyException; |
| 14 | use MediaWiki\Extension\OAuth\Response; |
| 15 | use MediaWiki\Rest\Response as RestResponse; |
| 16 | use MediaWiki\SpecialPage\SpecialPage; |
| 17 | use MediaWiki\User\User; |
| 18 | use MediaWiki\WikiMap\WikiMap; |
| 19 | use MWExceptionHandler; |
| 20 | use Throwable; |
| 21 | use Wikimedia\ParamValidator\ParamValidator; |
| 22 | |
| 23 | /** |
| 24 | * Handles the oauth2/authorize endpoint, which displays an authorization dialog to the user if |
| 25 | * needed (by redirecting to Special:OAuth/approve), and returns an authorization code that can be |
| 26 | * traded for the access token. |
| 27 | */ |
| 28 | class Authorize extends AuthenticationHandler { |
| 29 | private const RESPONSE_TYPE_CODE = 'code'; |
| 30 | |
| 31 | /** |
| 32 | * @inheritDoc |
| 33 | */ |
| 34 | public function execute() { |
| 35 | $response = new Response(); |
| 36 | |
| 37 | try { |
| 38 | if ( $this->queuedError ) { |
| 39 | throw $this->queuedError; |
| 40 | } |
| 41 | $request = ServerRequest::fromGlobals()->withQueryParams( |
| 42 | $this->getValidatedParams() |
| 43 | ); |
| 44 | // Note: Owner-only clients can only use client_credentials grant |
| 45 | // so would be rejected from this endpoint with invalid_client error |
| 46 | // automatically, no need for additional checks |
| 47 | if ( !$this->user instanceof User || !$this->user->isNamed() ) { |
| 48 | return $this->getLoginRedirectResponse(); |
| 49 | } |
| 50 | |
| 51 | $authProvider = $this->getAuthorizationProvider(); |
| 52 | $authProvider->setUser( $this->user ); |
| 53 | /** @var AuthorizationRequest $authRequest */ |
| 54 | $authRequest = $authProvider->init( $request ); |
| 55 | $this->setValidScopes( $authRequest ); |
| 56 | if ( !$authProvider->needsUserApproval() ) { |
| 57 | return $authProvider->authorize( $authRequest, $response ); |
| 58 | } |
| 59 | |
| 60 | if ( $this->getValidatedParams()['approval_cancel'] ) { |
| 61 | throw new ClientApprovalDenyException( $authRequest->getRedirectUri() ); |
| 62 | } |
| 63 | |
| 64 | if ( |
| 65 | $this->getValidatedParams()['approval_pass'] && |
| 66 | $this->checkApproval( $authRequest ) |
| 67 | ) { |
| 68 | $authRequest->setAuthorizationApproved( true ); |
| 69 | return $authProvider->authorize( $authRequest, $response ); |
| 70 | } |
| 71 | |
| 72 | return $this->getApprovalRedirectResponse( $authRequest ); |
| 73 | } catch ( OAuthServerException $ex ) { |
| 74 | return $this->errorResponse( $ex, $response ); |
| 75 | } catch ( Throwable $ex ) { |
| 76 | MWExceptionHandler::logException( $ex ); |
| 77 | return $this->errorResponse( |
| 78 | OAuthServerException::serverError( $ex->getMessage() ), |
| 79 | $response |
| 80 | ); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | protected function setValidScopes( AuthorizationRequest &$authRequest ) { |
| 85 | /** @var ClientEntity $client */ |
| 86 | $client = $authRequest->getClient(); |
| 87 | '@phan-var ClientEntity $client'; |
| 88 | |
| 89 | $scopes = $this->getValidatedParams()['scope']; |
| 90 | if ( !$scopes ) { |
| 91 | // No scope parameter |
| 92 | $authRequest->setScopes( |
| 93 | $client->getScopes() |
| 94 | ); |
| 95 | return; |
| 96 | } |
| 97 | // Trim off any not allowed scopes |
| 98 | $allowedScopes = $client->getGrants(); |
| 99 | |
| 100 | $authRequest->setScopes( array_filter( |
| 101 | $authRequest->getScopes(), |
| 102 | static function ( ScopeEntityInterface $scope ) use ( $allowedScopes ) { |
| 103 | return in_array( $scope->getIdentifier(), $allowedScopes ); |
| 104 | } |
| 105 | ) ); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * @inheritDoc |
| 110 | */ |
| 111 | public function getParamSettings() { |
| 112 | return [ |
| 113 | 'response_type' => [ |
| 114 | self::PARAM_SOURCE => 'query', |
| 115 | ParamValidator::PARAM_TYPE => [ |
| 116 | self::RESPONSE_TYPE_CODE |
| 117 | ], |
| 118 | ParamValidator::PARAM_REQUIRED => true, |
| 119 | ], |
| 120 | 'client_id' => [ |
| 121 | self::PARAM_SOURCE => 'query', |
| 122 | ParamValidator::PARAM_TYPE => 'string', |
| 123 | ParamValidator::PARAM_REQUIRED => true, |
| 124 | ], |
| 125 | 'redirect_uri' => [ |
| 126 | self::PARAM_SOURCE => 'query', |
| 127 | ParamValidator::PARAM_TYPE => 'string', |
| 128 | ParamValidator::PARAM_REQUIRED => false, |
| 129 | ], |
| 130 | 'scope' => [ |
| 131 | self::PARAM_SOURCE => 'query', |
| 132 | ParamValidator::PARAM_TYPE => 'string', |
| 133 | ParamValidator::PARAM_REQUIRED => false, |
| 134 | ], |
| 135 | 'state' => [ |
| 136 | self::PARAM_SOURCE => 'query', |
| 137 | ParamValidator::PARAM_TYPE => 'string', |
| 138 | ParamValidator::PARAM_REQUIRED => false, |
| 139 | ], |
| 140 | 'code_challenge' => [ |
| 141 | self::PARAM_SOURCE => 'query', |
| 142 | ParamValidator::PARAM_TYPE => 'string', |
| 143 | ParamValidator::PARAM_REQUIRED => false, |
| 144 | ], |
| 145 | 'code_challenge_method' => [ |
| 146 | self::PARAM_SOURCE => 'query', |
| 147 | ParamValidator::PARAM_TYPE => [ |
| 148 | 'plain', |
| 149 | 'S256' |
| 150 | ], |
| 151 | ParamValidator::PARAM_REQUIRED => false, |
| 152 | ], |
| 153 | 'approval_cancel' => [ |
| 154 | self::PARAM_SOURCE => 'query', |
| 155 | ParamValidator::PARAM_TYPE => 'string', |
| 156 | ParamValidator::PARAM_REQUIRED => false, |
| 157 | ], |
| 158 | 'approval_pass' => [ |
| 159 | self::PARAM_SOURCE => 'query', |
| 160 | ParamValidator::PARAM_TYPE => 'string', |
| 161 | ParamValidator::PARAM_REQUIRED => false, |
| 162 | ] |
| 163 | ]; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * @param AuthorizationRequest $authRequest |
| 168 | * @return RestResponse |
| 169 | */ |
| 170 | private function getApprovalRedirectResponse( AuthorizationRequest $authRequest ) { |
| 171 | return $this->getResponseFactory()->createTemporaryRedirect( |
| 172 | SpecialPage::getTitleFor( 'OAuth', 'approve' )->getFullURL( [ |
| 173 | 'returnto' => $this->getRequest()->getUri()->getPath(), |
| 174 | 'returntoquery' => $this->getQueryParamsCgi(), |
| 175 | 'client_id' => $authRequest->getClient()->getIdentifier(), |
| 176 | 'oauth_version' => ClientEntity::OAUTH_VERSION_2, |
| 177 | 'scope' => implode( ' ', array_map( static function ( ScopeEntityInterface $scope ) { |
| 178 | return $scope->getIdentifier(); |
| 179 | }, $authRequest->getScopes() ) ) |
| 180 | ] ) |
| 181 | ); |
| 182 | } |
| 183 | |
| 184 | private function getLoginRedirectResponse() { |
| 185 | return $this->getResponseFactory()->createTemporaryRedirect( |
| 186 | SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [ |
| 187 | 'returnto' => SpecialPage::getTitleFor( 'OAuth', 'rest_redirect' ), |
| 188 | 'returntoquery' => wfArrayToCgi( [ |
| 189 | 'rest_url' => $this->getRequest()->getUri()->__toString(), |
| 190 | ] ), |
| 191 | ] ) |
| 192 | ); |
| 193 | } |
| 194 | |
| 195 | /** |
| 196 | * @return string |
| 197 | */ |
| 198 | protected function getGrantKey() { |
| 199 | return 'response_type'; |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * @param string $grantKey |
| 204 | * @return string|false |
| 205 | */ |
| 206 | protected function getGrantClass( $grantKey ) { |
| 207 | switch ( $grantKey ) { |
| 208 | case static::RESPONSE_TYPE_CODE: |
| 209 | return AuthorizationCodeAuthorization::class; |
| 210 | default: |
| 211 | return false; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Check if user has approved the client, and scopes it requested |
| 217 | * |
| 218 | * @param AuthorizationRequest $authRequest |
| 219 | * @return bool |
| 220 | */ |
| 221 | private function checkApproval( AuthorizationRequest $authRequest ) { |
| 222 | /** @var ClientEntity $client */ |
| 223 | $client = $authRequest->getClient(); |
| 224 | '@phan-var ClientEntity $client'; |
| 225 | |
| 226 | /** @var UserEntity $userEntity */ |
| 227 | $userEntity = $authRequest->getUser(); |
| 228 | '@phan-var UserEntity $userEntity'; |
| 229 | |
| 230 | try { |
| 231 | $approval = $client->getCurrentAuthorization( |
| 232 | $userEntity->getMwUser(), |
| 233 | WikiMap::getCurrentWikiId() |
| 234 | ); |
| 235 | } catch ( Exception $ex ) { |
| 236 | return false; |
| 237 | } |
| 238 | |
| 239 | if ( !$approval ) { |
| 240 | return false; |
| 241 | } |
| 242 | |
| 243 | // Scopes in OAuth 1.0 are called grants |
| 244 | $scopes = $approval->getGrants(); |
| 245 | $requestedScopes = $this->getFlatScopes( $authRequest->getScopes() ); |
| 246 | $missing = array_diff( $requestedScopes, $scopes ); |
| 247 | if ( $missing ) { |
| 248 | return false; |
| 249 | } |
| 250 | |
| 251 | return true; |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * @param ScopeEntityInterface[] $scopeEntities |
| 256 | * @return string[] |
| 257 | */ |
| 258 | private function getFlatScopes( $scopeEntities ) { |
| 259 | return array_map( static function ( ScopeEntityInterface $scope ) { |
| 260 | return $scope->getIdentifier(); |
| 261 | }, $scopeEntities ); |
| 262 | } |
| 263 | } |