Jose\Algorithm\ContentEncryptionAlgorithmInterface::getCEKSize PHP Method

    public function getCEKSize();

 /**
  * @param \Jose\Object\JWEInterface                           $jwe
  * @param \Jose\Algorithm\ContentEncryptionAlgorithmInterface $content_encryption_algorithm
  * @param string                                              $key_management_mode
  * @param array                                               $additional_headers
  *
  * @return string
  */
 private function determineCEK(Object\JWEInterface $jwe, Algorithm\ContentEncryptionAlgorithmInterface $content_encryption_algorithm, $key_management_mode, array &$additional_headers)
 {
     switch ($key_management_mode) {
         case Algorithm\KeyEncryption\KeyEncryptionInterface::MODE_ENCRYPT:
         case Algorithm\KeyEncryption\KeyEncryptionInterface::MODE_WRAP:
             return $this->createCEK($content_encryption_algorithm->getCEKSize());
         case Algorithm\KeyEncryption\KeyEncryptionInterface::MODE_AGREEMENT:
             Assertion::eq(1, $jwe->countRecipients(), 'Unable to encrypt for multiple recipients using key agreement algorithms.');
             $complete_headers = array_merge($jwe->getSharedProtectedHeaders(), $jwe->getSharedHeaders(), $jwe->getRecipient(0)->getHeaders());
             $algorithm = $this->findKeyEncryptionAlgorithm($complete_headers);
             return $algorithm->getAgreementKey($content_encryption_algorithm->getCEKSize(), $content_encryption_algorithm->getAlgorithmName(), $jwe->getRecipient(0)->getRecipientKey(), $complete_headers, $additional_headers);
         case Algorithm\KeyEncryption\KeyEncryptionInterface::MODE_DIRECT:
             Assertion::eq(1, $jwe->countRecipients(), 'Unable to encrypt for multiple recipients using key agreement algorithms.');
             Assertion::eq($jwe->getRecipient(0)->getRecipientKey()->get('kty'), 'oct', 'Wrong key type.');
             Assertion::true($jwe->getRecipient(0)->getRecipientKey()->has('k'), 'The key parameter "k" is missing.');
             return Base64Url::decode($jwe->getRecipient(0)->getRecipientKey()->get('k'));
         default:
             throw new \InvalidArgumentException(sprintf('Unsupported key management mode "%s".', $key_management_mode));
     }
 }