[Summary view] [Print] [Text view]

   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 Cose\Algorithm\Signature\RSA;
  15  
  16  use Assert\Assertion;
  17  use Cose\Algorithm\Signature\Signature;
  18  use Cose\Key\Key;
  19  use Cose\Key\RsaKey;
  20  
  21  abstract class RSA implements Signature
  22  {
  23      public function sign(string $data, Key $key): string
  24      {
  25          $key = $this->handleKey($key);
  26          Assertion::true($key->isPrivate(), 'The key is not private');
  27  
  28          $result = openssl_sign($data, $signature, $key->asPem(), $this->getHashAlgorithm());
  29          Assertion::true($result, 'Unable to sign the data');
  30  
  31          return $signature;
  32      }
  33  
  34      public function verify(string $data, Key $key, string $signature): bool
  35      {
  36          $key = $this->handleKey($key);
  37  
  38          return 1 === openssl_verify($data, $signature, $key->asPem(), $this->getHashAlgorithm());
  39      }
  40  
  41      private function handleKey(Key $key): RsaKey
  42      {
  43          return new RsaKey($key->getData());
  44      }
  45  
  46      abstract protected function getHashAlgorithm(): int;
  47  }