public void testCreateData() throws StorageFileException, IOException, WrongKeyException { long indexFree = 25L; long indexConversation = 13L; int version = 32; Header header = Header.createHeader(); header.setIndexEmpty(indexFree); header.setIndexConversations(indexConversation); header.setVersion(version); header.saveToFile(); byte[] dataAll = Storage.getDatabase().getEntry(0); // chunk length assertEquals(dataAll.length, Storage.CHUNK_SIZE); // plain header assertEquals(dataAll[0], (byte) 0x53); // S assertEquals(dataAll[1], (byte) 0x4D); // M assertEquals(dataAll[2], (byte) 0x53); // S assertEquals(dataAll[3], (byte) version); // Version // decrypt the encoded part ByteBuffer buf = ByteBuffer.allocate(Storage.CHUNK_SIZE - 4); buf.put(dataAll, 4, Storage.CHUNK_SIZE - 4); byte[] dataPlain = Encryption.decryptSymmetric(buf.array(), Encryption.retreiveEncryptionKey()); // check the indices assertEquals( LowLevel.getUnsignedInt( dataPlain, Storage.CHUNK_SIZE - 4 - Encryption.ENCRYPTION_OVERHEAD - 8), indexFree); assertEquals( LowLevel.getUnsignedInt( dataPlain, Storage.CHUNK_SIZE - 4 - Encryption.ENCRYPTION_OVERHEAD - 4), indexConversation); }