| /* |
| * Copyright (C) 2013 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 libcore.java.util; |
| |
| import java.util.AbstractMap; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Hashtable; |
| import java.util.IdentityHashMap; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.WeakHashMap; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| public class EvilMapTest extends junit.framework.TestCase { |
| public static class EvilMap<K,V> extends AbstractMap<K,V> { |
| private final Set<Entry<K,V>> entries = new HashSet<Entry<K,V>>(); |
| |
| public EvilMap() { |
| entries.add(new AbstractMap.SimpleEntry("hi", "there")); |
| } |
| |
| // Claim we're empty... |
| @Override public int size() { return 0; } |
| // ...but potentially return many entries. |
| @Override public Set<Entry<K, V>> entrySet() { return entries; } |
| |
| // Dummy implementation, not relevant for this test but |
| // necessary to implement AbstractMap. |
| @Override public V put(K key, V val) { return val; } |
| } |
| |
| // https://code.google.com/p/android/issues/detail?id=48055 |
| public void test_48055_HashMap() throws Exception { |
| Map<String, String> evil = new EvilMap<String, String>(); |
| evil.put("hi", "there"); |
| // Corrupt one HashMap... |
| HashMap<String, String> map = new HashMap<String, String>(evil); |
| // ...and now they're all corrupted. |
| HashMap<String, String> map2 = new HashMap<String, String>(); |
| assertNull(map2.get("hi")); |
| } |
| |
| public void test_48055_Hashtable() throws Exception { |
| Map<String, String> evil = new EvilMap<String, String>(); |
| evil.put("hi", "there"); |
| // Corrupt one Hashtable... |
| Hashtable<String, String> map = new Hashtable<String, String>(evil); |
| // ...and now they're all corrupted. |
| Hashtable<String, String> map2 = new Hashtable<String, String>(); |
| assertNull(map2.get("hi")); |
| } |
| |
| public void test_48055_LinkedHashMap() throws Exception { |
| Map<String, String> evil = new EvilMap<String, String>(); |
| evil.put("hi", "there"); |
| // Corrupt one LinkedHashMap... |
| LinkedHashMap<String, String> map = new LinkedHashMap<String, String>(evil); |
| // ...and now they're all corrupted. |
| LinkedHashMap<String, String> map2 = new LinkedHashMap<String, String>(); |
| assertNull(map2.get("hi")); |
| } |
| |
| public void test_48055_WeakHashMap() throws Exception { |
| Map<String, String> evil = new EvilMap<String, String>(); |
| evil.put("hi", "there"); |
| // Corrupt one WeakHashMap... |
| WeakHashMap<String, String> map = new WeakHashMap<String, String>(evil); |
| // ...and now they're all corrupted. |
| WeakHashMap<String, String> map2 = new WeakHashMap<String, String>(); |
| assertNull(map2.get("hi")); |
| } |
| |
| public void test_48055_IdentityHashMap() throws Exception { |
| Map<String, String> evil = new EvilMap<String, String>(); |
| evil.put("hi", "there"); |
| // Corrupt one IdentityHashMap... |
| IdentityHashMap<String, String> map = new IdentityHashMap<String, String>(evil); |
| // ...and now they're all corrupted. |
| IdentityHashMap<String, String> map2 = new IdentityHashMap<String, String>(); |
| assertNull(map2.get("hi")); |
| } |
| |
| public void test_48055_ConcurrentHashMap() throws Exception { |
| Map<String, String> evil = new EvilMap<String, String>(); |
| evil.put("hi", "there"); |
| // Corrupt one ConcurrentHashMap... |
| ConcurrentHashMap<String, String> map = new ConcurrentHashMap<String, String>(evil); |
| // ...and now they're all corrupted. |
| ConcurrentHashMap<String, String> map2 = new ConcurrentHashMap<String, String>(); |
| assertNull(map2.get("hi")); |
| } |
| |
| |
| } |