| /* |
| * Copyright (C) 2010 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.javax.crypto; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Arrays; |
| import javax.crypto.Cipher; |
| import javax.crypto.CipherInputStream; |
| import javax.crypto.SecretKey; |
| import javax.crypto.spec.SecretKeySpec; |
| import junit.framework.TestCase; |
| |
| public final class CipherInputStreamTest extends TestCase { |
| |
| private final byte[] keyBytes = { 127, -2, -95, -39, 35, 118, 121, -92 }; |
| private final String plainText = "abcde"; |
| private final byte[] cipherText = { 121, -124, -106, 43, -55, -67, -105, -75 }; |
| private SecretKey key; |
| |
| @Override protected void setUp() throws Exception { |
| key = new SecretKeySpec(keyBytes, "DES"); |
| } |
| |
| public void testEncrypt() throws Exception { |
| Cipher cipher = Cipher.getInstance("DES"); |
| cipher.init(Cipher.ENCRYPT_MODE, key); |
| InputStream in = new CipherInputStream( |
| new ByteArrayInputStream(plainText.getBytes("UTF-8")), cipher); |
| byte[] bytes = readAll(in); |
| assertEquals(Arrays.toString(cipherText), Arrays.toString(bytes)); |
| } |
| |
| public void testDecrypt() throws Exception { |
| Cipher cipher = Cipher.getInstance("DES"); |
| cipher.init(Cipher.DECRYPT_MODE, key); |
| InputStream in = new CipherInputStream(new ByteArrayInputStream(cipherText), cipher); |
| byte[] bytes = readAll(in); |
| assertEquals(plainText, new String(bytes, "UTF-8")); |
| } |
| |
| public void testSkip() throws Exception { |
| Cipher cipher = Cipher.getInstance("DES"); |
| cipher.init(Cipher.DECRYPT_MODE, key); |
| InputStream in = new CipherInputStream(new ByteArrayInputStream(cipherText), cipher); |
| assertTrue(in.skip(5) > 0); |
| } |
| |
| private byte[] readAll(InputStream in) throws IOException { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| int count; |
| byte[] buffer = new byte[1024]; |
| while ((count = in.read(buffer)) != -1) { |
| out.write(buffer, 0, count); |
| } |
| return out.toByteArray(); |
| } |
| } |