fix unencrypted_size for files when scanning

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

lib/private/Files/Cache/Scanner.php

@@ -208,9 +208,17 @@ class Scanner extends BasicEmitter implements IScanner {
 								$data['etag'] = $etag;
 							}
 						}
+
+						// we only updated unencrypted_size if it's already set
+						if ($cacheData['unencrypted_size'] === 0) {
+							unset($data['unencrypted_size']);
+						}
+
 						// Only update metadata that has changed
 						$newData = array_diff_assoc($data, $cacheData->getData());
 					} else {
+						// we only updated unencrypted_size if it's already set
+						unset($data['unencrypted_size']);
 						$newData = $data;
 						$fileId = -1;
 					}

lib/private/Files/Storage/Wrapper/Encryption.php

@@ -180,10 +180,12 @@ class Encryption extends Wrapper {
 		if (isset($this->unencryptedSize[$fullPath])) {
 			$data['encrypted'] = true;
 			$data['size'] = $this->unencryptedSize[$fullPath];
+			$data['unencrypted_size'] = $data['size'];
 		} else {
 			if (isset($info['fileid']) && $info['encrypted']) {
 				$data['size'] = $this->verifyUnencryptedSize($path, $info->getUnencryptedSize());
 				$data['encrypted'] = true;
+				$data['unencrypted_size'] = $data['size'];
 			}
 		}
 
@@ -494,7 +496,8 @@ class Encryption extends Wrapper {
 		$result = $unencryptedSize;
 
 		if ($unencryptedSize < 0 ||
-			($size > 0 && $unencryptedSize === $size)
+			($size > 0 && $unencryptedSize === $size) ||
+			$unencryptedSize > $size
 		) {
 			// check if we already calculate the unencrypted size for the
 			// given path to avoid recursions