add ownerpassword and options (#651)

Co-authored-by: Barry vd. Heuvel <[email protected]>

src/PDF.php

@@ -246,19 +246,18 @@ public function render()
         $this->rendered = true;
     }
 
-
-    public function setEncryption($password)
+    public function setEncryption($password, $ownerpassword = '', $pc = []) 
     {
-        if (!$this->dompdf) {
-            throw new Exception("DOMPDF not created yet");
-        }
-        $this->render();
-        return $this->dompdf->getCanvas()->get_cpdf()->setEncryption("pass", $password);
+       if (!$this->dompdf) {
+           throw new Exception("DOMPDF not created yet");
+       }
+       $this->render();
+       return $this->dompdf->getCanvas()->get_cpdf()->setEncryption($password, $ownerpassword, $pc);
     }
 
-
     protected function convertEntities($subject)
     {
+
         $entities = array(
             '€' => '€',
             '£' => '£',