Merge pull request #14968 from owncloud/files-reallowsinglequote

Reallow single quote in file names

lib/private/files/storage/common.php

@@ -512,7 +512,7 @@ abstract class Common implements \OC\Files\Storage\Storage {
 			}
 		}
 
-		$sanitizedFileName = filter_var($fileName, FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW);
+		$sanitizedFileName = filter_var($fileName, FILTER_UNSAFE_RAW, FILTER_FLAG_STRIP_LOW);
 		if($sanitizedFileName !== $fileName) {
 			throw new InvalidCharacterInPathException();
 		}

tests/lib/files/pathverificationtest.php

@@ -230,4 +230,30 @@ class PathVerification extends \Test\TestCase {
 		];
 	}
 
+	/**
+	 * @dataProvider providesValidPosixPaths
+	 */
+	public function testPathVerificationValidPaths($fileName) {
+		$storage = new Local(['datadir' => '']);
+
+		\Test_Helper::invokePrivate($storage, 'verifyPosixPath', [$fileName]);
+		\Test_Helper::invokePrivate($storage, 'verifyWindowsPath', [$fileName]);
+		// nothing thrown
+		$this->assertTrue(true);
+	}
+
+	public function providesValidPosixPaths() {
+		return [
+			['simple'],
+			['simple.txt'],
+			['\''],
+			['`'],
+			['%'],
+			['()'],
+			['[]'],
+			['!'],
+			['$'],
+			['_'],
+		];
+	}
 }