test: enforce explicit CRL signature verification

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

tests/php/Unit/Handler/CertificateEngine/OpenSslHandlerTest.php

@@ -502,7 +502,7 @@ public function testGenerateCrlDerWithRevokedCertificates(array $certificates):
 
 			$caCertPath = $configPath . DIRECTORY_SEPARATOR . 'ca.pem';
 			$verifyCmd = sprintf(
-				'openssl crl -in %s -inform DER -CAfile %s -noout 2>&1',
+				'openssl crl -in %s -inform DER -CAfile %s -verify -noout 2>&1',
 				escapeshellarg($tempCrlFile),
 				escapeshellarg($caCertPath)
 			);