/**
* {@inheritdoc}
*/
public function writeEncryptDictionary(PdfWriter $pdfWriter)
{
$pdfWriter->startDictionary();
$pdfWriter->writeName('Filter');
$pdfWriter->writeName('Standard');
$pdfWriter->writeName('V');
$pdfWriter->writeNumber($this->getAlgorithm());
$pdfWriter->writeName('R');
$pdfWriter->writeNumber($this->getRevision());
$pdfWriter->writeName('O');
$pdfWriter->writeNumber($this->ownerEntry);
$pdfWriter->writeName('U');
$pdfWriter->writeNumber($this->userEntry);
$pdfWriter->writeName('P');
if (null === $this->userPermissions) {
$pdfWriter->writeNumber(0);
} else {
$pdfWriter->writeNumber($this->userPermissions->toInt($this->getRevision()));
}
$this->writeAdditionalEncryptDictionaryEntries($pdfWriter);
$pdfWriter->endDictionary();
}
