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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 Cose\Algorithm\Signature\ECDSA;
  15  
  16  use Cose\Key\Ec2Key;
  17  use Cose\Key\Key;
  18  
  19  final class ES512 extends ECDSA
  20  {
  21      public const ID = -36;
  22  
  23      public static function identifier(): int
  24      {
  25          return self::ID;
  26      }
  27  
  28      public function sign(string $data, Key $key): string
  29      {
  30          $signature = parent::sign($data, $key);
  31  
  32          return ECSignature::fromAsn1($signature, $this->getSignaturePartLength());
  33      }
  34  
  35      public function verify(string $data, Key $key, string $signature): bool
  36      {
  37          if (mb_strlen($signature, '8bit') !== $this->getSignaturePartLength()) {
  38              @trigger_error('Since v2.1, the method "verify" accepts ASN.1 structures and raw ECDSA signature. In v3.0 and ASN.1 structures will be rejected', E_USER_DEPRECATED);
  39          } else {
  40              $signature = ECSignature::toAsn1($signature, $this->getSignaturePartLength());
  41          }
  42  
  43          return parent::verify($data, $key, $signature);
  44      }
  45  
  46      protected function getHashAlgorithm(): int
  47      {
  48          return OPENSSL_ALGO_SHA512;
  49      }
  50  
  51      protected function getCurve(): int
  52      {
  53          return Ec2Key::CURVE_P521;
  54      }
  55  
  56      protected function getSignaturePartLength(): int
  57      {
  58          return 132;
  59      }
  60  }