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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package tests.targets.security;
     17 
     18 import dalvik.annotation.AndroidOnly;
     19 import java.security.MessageDigest;
     20 import java.security.NoSuchAlgorithmException;
     21 import java.security.Provider;
     22 import java.security.Security;
     23 import junit.framework.TestCase;
     24 
     25 public class MessageDigestTestMD2 extends TestCase {
     26 
     27     @AndroidOnly("Android doesn't include MD2 message digest algorithm")
     28     public void testMessageDigest1() throws Exception{
     29         try {
     30             MessageDigest digest = MessageDigest.getInstance("MD2");
     31             fail("MD2 MessageDigest algorithm must not be supported");
     32         } catch (NoSuchAlgorithmException e) {
     33             // expected
     34         }
     35 
     36         try {
     37             MessageDigest digest = MessageDigest.getInstance(
     38                     "1.2.840.113549.2.2");
     39             fail("MD2 MessageDigest algorithm must not be supported");
     40         } catch (NoSuchAlgorithmException e) {
     41             // expected
     42         }
     43     }
     44 
     45     @AndroidOnly("Android allows usage of MD2 in third party providers")
     46     public void testMessageDigest2() throws Exception{
     47 
     48         Provider provider  = new MyProvider();
     49         Security.addProvider(provider);
     50 
     51         try {
     52             MessageDigest digest = MessageDigest.getInstance("MD2");
     53 
     54             digest = MessageDigest.getInstance("1.2.840.113549.2.2");
     55         } finally {
     56             Security.removeProvider(provider.getName());
     57         }
     58     }
     59 
     60     public final class MyProvider extends Provider {
     61         public MyProvider() {
     62             super("MessageDigestMD2Test", 1.00, "TestProvider");
     63             put("MessageDigest.MD2",
     64                     "tests.targets.security.MessageDigestTestMD2$MD2");
     65             put("Alg.Alias.MessageDigest.1.2.840.113549.2.2", "MD2");
     66         }
     67     }
     68 
     69     public static class MD2 extends MessageDigest {
     70 
     71         public MD2() {
     72             super("MD2");
     73         }
     74 
     75         protected MD2(String algorithm) {
     76             super(algorithm);
     77         }
     78 
     79         @Override
     80         protected byte[] engineDigest() {
     81             return null;
     82         }
     83 
     84         @Override
     85         protected void engineReset() {
     86         }
     87 
     88         @Override
     89         protected void engineUpdate(byte input) {
     90         }
     91 
     92         @Override
     93         protected void engineUpdate(byte[] input, int offset, int len) {
     94         }
     95     }
     96 }
     97