git.stricted.de - GitHub/WoltLab/WCF.git/blob

   1 <?php
   2
   3 declare(strict_types=1);
   4
   5 namespace Jose\Component\Encryption\Algorithm\KeyEncryption;
   6
   7 use InvalidArgumentException;
   8 use Jose\Component\Core\JWK;
   9 use ParagonIE\ConstantTime\Base64UrlSafe;
  10 use function in_array;
  11 use function is_string;
  12
  13 final class Dir implements DirectEncryption
  14 {
  15     public function getCEK(JWK $key): string
  16     {
  17         if (! in_array($key->get('kty'), $this->allowedKeyTypes(), true)) {
  18             throw new InvalidArgumentException('Wrong key type.');
  19         }
  20         if (! $key->has('k')) {
  21             throw new InvalidArgumentException('The key parameter "k" is missing.');
  22         }
  23         $k = $key->get('k');
  24         if (! is_string($k)) {
  25             throw new InvalidArgumentException('The key parameter "k" is invalid.');
  26         }
  27
  28         return Base64UrlSafe::decodeNoPadding($k);
  29     }
  30
  31     public function name(): string
  32     {
  33         return 'dir';
  34     }
  35
  36     public function allowedKeyTypes(): array
  37     {
  38         return ['oct'];
  39     }
  40
  41     public function getKeyManagementMode(): string
  42     {
  43         return self::MODE_DIRECT;
  44     }
  45 }