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<?php declare(strict_types=1); |
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namespace SilverStripe\MFA\BackupCode; |
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use RuntimeException; |
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use SilverStripe\Control\HTTPRequest; |
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use SilverStripe\Core\Manifest\ModuleLoader; |
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use SilverStripe\MFA\Method\Handler\VerifyHandlerInterface; |
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use SilverStripe\MFA\Model\RegisteredMethod; |
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use SilverStripe\MFA\Service\Notification; |
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use SilverStripe\MFA\State\BackupCode; |
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use SilverStripe\MFA\State\Result; |
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use SilverStripe\MFA\Store\StoreInterface; |
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class VerifyHandler implements VerifyHandlerInterface |
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{ |
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private static $dependencies = [ |
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'NotificationService' => '%$' . Notification::class |
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]; |
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/** |
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* @var Notification |
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*/ |
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protected $notification; |
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public function setNotificationService(Notification $notification): self |
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{ |
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$this->notification = $notification; |
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return $this; |
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} |
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/** |
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* Stores any data required to handle a login process with a method, and returns relevant state to be applied to the |
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* front-end application managing the process. |
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* |
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* @param StoreInterface $store An object that hold session data (and the Member) that can be mutated |
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* @param RegisteredMethod $method The RegisteredMethod instance that is being verified |
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* @return array Props to be passed to a front-end component |
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*/ |
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public function start(StoreInterface $store, RegisteredMethod $method): array |
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{ |
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// Provide a path to the graphic shown |
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return [ |
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'graphic' => ModuleLoader::getModule('silverstripe/mfa') |
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->getResource('client/dist/images/recovery-codes.svg')->getURL(), |
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]; |
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} |
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/** |
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* Verify the request has provided the right information to verify the member that aligns with any sessions state |
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* that may have been set prior |
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* |
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* @param HTTPRequest $request |
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* @param StoreInterface $store |
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* @param RegisteredMethod $registeredMethod The RegisteredMethod instance that is being verified |
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* @return Result |
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*/ |
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public function verify(HTTPRequest $request, StoreInterface $store, RegisteredMethod $registeredMethod): Result |
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{ |
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$bodyJSON = json_decode($request->getBody(), true); |
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if (!isset($bodyJSON['code'])) { |
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throw new RuntimeException( |
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'Verification of backup codes requires the code to be provided but it was not given' |
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); |
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} |
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$code = $bodyJSON['code']; |
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$candidates = json_decode($registeredMethod->Data, true); |
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foreach ($candidates as $index => $candidate) { |
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$candidateData = json_decode($candidate, true) ?? []; |
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$backupCode = BackupCode::create( |
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$code, |
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$candidateData['hash'] ?? '', |
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$candidateData['algorithm'] ?? '', |
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$candidateData['salt'] ?? '' |
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); |
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if (!$backupCode->isValid()) { |
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continue; |
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} |
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// Remove the verified code from the valid list of codes |
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array_splice($candidates, $index, 1); |
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$registeredMethod->Data = json_encode($candidates); |
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$registeredMethod->write(); |
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$this->notification->send( |
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$registeredMethod->Member(), |
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'SilverStripe/MFA/Email/Notification_backupcodeused', |
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[ |
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'subject' => _t(self::class . '.MFAREMOVED', 'A recovery code was used to access your account'), |
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'CodesRemaining' => count($candidates), |
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] |
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); |
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return Result::create(); |
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} |
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return Result::create(false, _t(__CLASS__ . '.INVALID_CODE', 'Invalid code')); |
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} |
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/** |
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* Get the key that a React UI component is registered under (with @silverstripe/react-injector on the front-end) |
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* |
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* @return string |
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*/ |
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public function getComponent(): string |
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{ |
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return 'BackupCodeVerify'; |
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} |
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} |
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