Micro-optimize

src/Generator/DceSecurityGenerator.php

@@ -95,12 +95,7 @@ class DceSecurityGenerator implements DceSecurityGeneratorInterface
         }
 
         $domainByte = pack('n', $localDomain)[1];
-        $identifierBytes = hex2bin(str_pad(
-            $this->numberConverter->toHex($localIdentifier->toString()),
-            8,
-            '0',
-            STR_PAD_LEFT
-        ));
+        $identifierBytes = pack('N*', $localIdentifier->toString());
 
         if ($node instanceof Hexadecimal) {
             $node = $node->toString();