| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.permission.cts; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.util.Scanner; |
| |
| import junit.framework.TestCase; |
| |
| /** |
| * {@link TestCase} that checks that the NX (No Execute) feature is enabled. This feature makes it |
| * harder to perform attacks against Android by marking certain data blocks as non-executable. |
| */ |
| public class NoExecutePermissionTest extends TestCase { |
| |
| public void testNoExecutePermission() throws FileNotFoundException { |
| String heapPermissions = null; |
| String stackPermissions = null; |
| |
| Scanner scanner = null; |
| try { |
| scanner = new Scanner(new File("/proc/self/maps")); |
| while (scanner.hasNextLine()) { |
| String line = scanner.nextLine().trim(); |
| String[] fields = line.split("\\s+"); |
| |
| // Sample line: |
| // 0001d000-00024000 rw-p 00000000 00:00 0 [heap] |
| if (fields != null && fields.length >= 1) { |
| String permissions = fields[1]; |
| if (fields.length >= 6) { |
| String tag = fields[5]; |
| if ("[heap]".equals(tag)) { |
| heapPermissions = permissions; |
| } else if ("[stack]".equals(tag)) { |
| stackPermissions = permissions; |
| } |
| } |
| } |
| } |
| } finally { |
| if (scanner != null) { |
| scanner.close(); |
| } |
| } |
| |
| assertEquals("NX (No Execute) not enabled for heap", "rw-p", heapPermissions); |
| assertEquals("NX (No Execute) not enabled for stack", "rw-p", stackPermissions); |
| } |
| } |