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
17package tests.security;
18
19import java.security.InvalidKeyException;
20import java.security.Key;
21import java.security.NoSuchAlgorithmException;
22import javax.crypto.BadPaddingException;
23import javax.crypto.Cipher;
24import javax.crypto.IllegalBlockSizeException;
25import javax.crypto.NoSuchPaddingException;
26import junit.framework.Assert;
27
28public abstract class CipherHelper<T> extends TestHelper<T> {
29
30    private final String algorithmName;
31    private final String plainData;
32    private final int mode1;
33    private final int mode2;
34
35    public CipherHelper(String algorithmName, String plainData, int mode1, int mode2) {
36        this.algorithmName = algorithmName;
37        this.plainData = plainData;
38        this.mode1 = mode1;
39        this.mode2 = mode2;
40    }
41
42    public void test(Key encryptKey, Key decryptKey) throws Exception {
43        Cipher cipher = Cipher.getInstance(algorithmName);
44        cipher.init(mode1, encryptKey);
45        byte[] encrypted = cipher.doFinal(plainData.getBytes());
46
47        cipher.init(mode2, decryptKey);
48        byte[] decrypted = cipher.doFinal(encrypted);
49        String decryptedString = new String(decrypted);
50
51        Assert.assertEquals("transformed data does not match", plainData, decryptedString);
52    }
53}
54