fix: give target file all permissions on copy

Signed-off-by: Robin Appelman <robin@icewind.nl>

Author: icewind1991

lib/private/Files/Cache/Cache.php

@@ -1169,6 +1169,12 @@ public function copyFromCache(ICache $sourceCache, ICacheEntry $sourceEntry, str
 			throw new \RuntimeException('Invalid source cache entry on copyFromCache');
 		}
 		$data = $this->cacheEntryToArray($sourceEntry);
+		// since we are essentially creating a new file, we don't have to obey the source permissions
+		if ($sourceEntry->getMimeType() === ICacheEntry::DIRECTORY_MIMETYPE) {
+			$data['permissions'] = Constants::PERMISSION_ALL;
+		} else {
+			$data['permissions'] = Constants::PERMISSION_ALL - Constants::PERMISSION_CREATE;
+		}
 
 		// when moving from an encrypted storage to a non-encrypted storage remove the `encrypted` mark
 		if ($sourceCache instanceof Cache && $sourceCache->hasEncryptionWrapper() && !$this->hasEncryptionWrapper()) {