From 647c65a640f3e4c4b27e96f63684be2a2f55674f Mon Sep 17 00:00:00 2001
From: Jan Messer <jan@mtec-studios.ch>
Date: Tue, 4 Apr 2023 22:01:35 +0200
Subject: [PATCH] [BUGFIX] throw exception instead of error if unable to create
 file handler (only exceptions are catch)

Signed-off-by: Jan Messer <jan@mtec-studios.ch>
---
 lib/private/Security/CertificateManager.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/private/Security/CertificateManager.php b/lib/private/Security/CertificateManager.php
index bcc992caa5df6..3338c00f579f5 100644
--- a/lib/private/Security/CertificateManager.php
+++ b/lib/private/Security/CertificateManager.php
@@ -138,6 +138,10 @@ public function createCertificateBundle(): void {
 		$tmpPath = $certPath . '.tmp' . $this->random->generate(10, ISecureRandom::CHAR_DIGITS);
 		$fhCerts = $this->view->fopen($tmpPath, 'w');
 
+		if (!is_resource($fhCerts)) {
+			throw new \RuntimeException('Unable to open file handler to create certificate bundle "' . $tmpPath . '".');
+		}
+
 		// Write user certificates
 		foreach ($certs as $cert) {
 			$file = $path . '/uploads/' . $cert->getName();