@Test
public void testRc4WithEmptyData() throws IOException {
Closer closer = Closer.create();
try {
// generate random input data
byte[] randomData = TestUtils.randomBytes(0, true);
InputStream randomInputStream = new ByteArrayInputStream(randomData);
closer.register(randomInputStream);
// generate cipher key
byte[] keyBytes = Rc4Utils.generateKey();
// encrypt and write
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
closer.register(byteArrayOutputStream);
OutputStream encryptedOutputStream = Rc4Utils.encrypt(byteArrayOutputStream, keyBytes);
closer.register(encryptedOutputStream);
ByteStreams.copy(randomInputStream, encryptedOutputStream);
byte[] encryptedBytes = byteArrayOutputStream.toByteArray();
// read and decrypt
InputStream encryptedInputStream = new ByteArrayInputStream(encryptedBytes);
closer.register(encryptedInputStream);
InputStream decryptedInputStream = Rc4Utils.decrypt(encryptedInputStream, keyBytes);
closer.register(decryptedInputStream);
byte[] decryptedData = ByteStreams.toByteArray(decryptedInputStream);
// checking data
Assert.assertArrayEquals(randomData, decryptedData);
Assert.assertArrayEquals(Rc4Utils.encrypt(randomData, keyBytes), encryptedBytes);
Assert.assertArrayEquals(Rc4Utils.decrypt(encryptedBytes, keyBytes), randomData);
} catch (Throwable t) {
closer.rethrow(t);
} finally {
closer.close();
}
}