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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\X509\CSR;
  12  
  13  use FG\ASN1\ASNObject;
  14  use FG\X509\CertificateExtensions;
  15  use FG\ASN1\OID;
  16  use FG\ASN1\Parsable;
  17  use FG\ASN1\Construct;
  18  use FG\ASN1\Identifier;
  19  use FG\ASN1\Universal\Set;
  20  use FG\ASN1\Universal\Sequence;
  21  use FG\ASN1\Universal\ObjectIdentifier;
  22  
  23  class Attributes extends Construct implements Parsable
  24  {
  25      public function getType()
  26      {
  27          return 0xA0;
  28      }
  29  
  30      public function addAttribute($objectIdentifier, Set $attribute)
  31      {
  32          if (is_string($objectIdentifier)) {
  33              $objectIdentifier = new ObjectIdentifier($objectIdentifier);
  34          }
  35          $attributeSequence = new Sequence($objectIdentifier, $attribute);
  36          $attributeSequence->getNumberOfLengthOctets();  // length and number of length octets is calculated
  37          $this->addChild($attributeSequence);
  38      }
  39  
  40      public static function fromBinary(&$binaryData, &$offsetIndex = 0)
  41      {
  42          self::parseIdentifier($binaryData[$offsetIndex], 0xA0, $offsetIndex++);
  43          $contentLength = self::parseContentLength($binaryData, $offsetIndex);
  44          $octetsToRead = $contentLength;
  45  
  46          $parsedObject = new self();
  47          while ($octetsToRead > 0) {
  48              $initialOffset = $offsetIndex; // used to calculate how much bits have been read
  49              self::parseIdentifier($binaryData[$offsetIndex], Identifier::SEQUENCE, $offsetIndex++);
  50              self::parseContentLength($binaryData, $offsetIndex);
  51  
  52              $objectIdentifier = ObjectIdentifier::fromBinary($binaryData, $offsetIndex);
  53              $oidString = $objectIdentifier->getContent();
  54              if ($oidString == OID::PKCS9_EXTENSION_REQUEST) {
  55                  $attribute = CertificateExtensions::fromBinary($binaryData, $offsetIndex);
  56              } else {
  57                  $attribute = ASNObject::fromBinary($binaryData, $offsetIndex);
  58              }
  59  
  60              $parsedObject->addAttribute($objectIdentifier, $attribute);
  61              $octetsToRead -= ($offsetIndex - $initialOffset);
  62          }
  63  
  64          $parsedObject->setContentLength($contentLength);
  65  
  66          return $parsedObject;
  67      }
  68  }