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   1  <?php
   2  
   3  declare(strict_types=1);
   4  
   5  /*
   6   * The MIT License (MIT)
   7   *
   8   * Copyright (c) 2014-2019 Spomky-Labs
   9   *
  10   * This software may be modified and distributed under the terms
  11   * of the MIT license.  See the LICENSE file for details.
  12   */
  13  
  14  namespace Webauthn;
  15  
  16  use Assert\Assertion;
  17  
  18  /**
  19   * @see https://www.w3.org/TR/webauthn/#authenticatorassertionresponse
  20   */
  21  class AuthenticatorAssertionResponse extends AuthenticatorResponse
  22  {
  23      /**
  24       * @var AuthenticatorData
  25       */
  26      private $authenticatorData;
  27  
  28      /**
  29       * @var string
  30       */
  31      private $signature;
  32  
  33      /**
  34       * @var string|null
  35       */
  36      private $userHandle;
  37  
  38      public function __construct(CollectedClientData $clientDataJSON, AuthenticatorData $authenticatorData, string $signature, ?string $userHandle)
  39      {
  40          parent::__construct($clientDataJSON);
  41          $this->authenticatorData = $authenticatorData;
  42          $this->signature = $signature;
  43          $this->userHandle = $userHandle;
  44      }
  45  
  46      public function getAuthenticatorData(): AuthenticatorData
  47      {
  48          return $this->authenticatorData;
  49      }
  50  
  51      public function getSignature(): string
  52      {
  53          return $this->signature;
  54      }
  55  
  56      public function getUserHandle(): ?string
  57      {
  58          if (null === $this->userHandle || '' === $this->userHandle) {
  59              return $this->userHandle;
  60          }
  61  
  62          $decoded = base64_decode($this->userHandle, true);
  63          Assertion::string($decoded, 'Unable to decode the data');
  64  
  65          return $decoded;
  66      }
  67  }