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   1  <?php
   2  /*
   3   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   4   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   5   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   6   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   7   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   8   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   9   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  10   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  11   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  12   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  13   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  14   *
  15   * This software consists of voluntary contributions made by many individuals
  16   * and is licensed under the MIT license.
  17   */
  18  
  19  namespace ProxyManager\Signature;
  20  
  21  use ProxyManager\Signature\Exception\InvalidSignatureException;
  22  use ProxyManager\Signature\Exception\MissingSignatureException;
  23  use ReflectionClass;
  24  
  25  /**
  26   * Generator for signatures to be used to check the validity of generated code
  27   *
  28   * @author Marco Pivetta <ocramius@gmail.com>
  29   * @license MIT
  30   */
  31  final class SignatureChecker implements SignatureCheckerInterface
  32  {
  33      /**
  34       * @var SignatureGeneratorInterface
  35       */
  36      private $signatureGenerator;
  37  
  38      /**
  39       * @param SignatureGeneratorInterface $signatureGenerator
  40       */
  41      public function __construct(SignatureGeneratorInterface $signatureGenerator)
  42      {
  43          $this->signatureGenerator = $signatureGenerator;
  44      }
  45  
  46      /**
  47       * {@inheritDoc}
  48       */
  49      public function checkSignature(ReflectionClass $class, array $parameters)
  50      {
  51          $propertyName      = 'signature' . $this->signatureGenerator->generateSignatureKey($parameters);
  52          $signature         = $this->signatureGenerator->generateSignature($parameters);
  53          $defaultProperties = $class->getDefaultProperties();
  54  
  55          if (! isset($defaultProperties[$propertyName])) {
  56              throw MissingSignatureException::fromMissingSignature($class, $parameters, $signature);
  57          }
  58  
  59          if ($defaultProperties[$propertyName] !== $signature) {
  60              throw InvalidSignatureException::fromInvalidSignature(
  61                  $class,
  62                  $parameters,
  63                  $defaultProperties[$propertyName],
  64                  $signature
  65              );
  66          }
  67      }
  68  }