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   1  <?php
   2  /*
   3   * This file is part of the PHPASN1 library.
   4   *
   5   * Copyright © Friedrich Große <[email protected]>
   6   *
   7   * For the full copyright and license information, please view the LICENSE
   8   * file that was distributed with this source code.
   9   */
  10  
  11  namespace FG\ASN1;
  12  
  13  use Exception;
  14  use FG\ASN1\Exception\ParserException;
  15  use FG\ASN1\Universal\Sequence;
  16  
  17  class TemplateParser
  18  {
  19      /**
  20       * @param string $data
  21       * @param array $template
  22       * @return \FG\ASN1\ASNObject|Sequence
  23       * @throws ParserException if there was an issue parsing
  24       */
  25      public function parseBase64($data, array $template)
  26      {
  27          // TODO test with invalid data
  28          return $this->parseBinary(base64_decode($data), $template);
  29      }
  30  
  31      /**
  32       * @param string $binary
  33       * @param array $template
  34       * @return \FG\ASN1\ASNObject|Sequence
  35       * @throws ParserException if there was an issue parsing
  36       */
  37      public function parseBinary($binary, array $template)
  38      {
  39          $parsedObject = ASNObject::fromBinary($binary);
  40  
  41          foreach ($template as $key => $value) {
  42              $this->validate($parsedObject, $key, $value);
  43          }
  44  
  45          return $parsedObject;
  46      }
  47  
  48      private function validate(ASNObject $object, $key, $value)
  49      {
  50          if (is_array($value)) {
  51              $this->assertTypeId($key, $object);
  52  
  53              /* @var Construct $object */
  54              foreach ($value as $key => $child) {
  55                  $this->validate($object->current(), $key, $child);
  56                  $object->next();
  57              }
  58          } else {
  59              $this->assertTypeId($value, $object);
  60          }
  61      }
  62  
  63      private function assertTypeId($expectedTypeId, ASNObject $object)
  64      {
  65          $actualType = $object->getType();
  66          if ($expectedTypeId != $actualType) {
  67              throw new Exception("Expected type ($expectedTypeId) does not match actual type ($actualType");
  68          }
  69      }
  70  }