Thread: Encryption

I'm currently struggling on sealing objects for an inherited class and was wondering if anyone here could help.

How do I use this code with a fixed key instead of a generated key?

public static void main(String[] args) throws Exception {
 
	Security.addProvider(new FlexiCoreProvider());
 
	Cipher cipher = Cipher.getInstance("AES128_CBC", "FlexiCore");
	KeyGenerator keyGen = KeyGenerator.getInstance("AES", "FlexiCore");
	SecretKey secKey = keyGen.generateKey();
        System.out.println(secKey);
 
	// Encrypt
 
	cipher.init(Cipher.ENCRYPT_MODE, secKey);
 
	String cleartextFile = "cleartextFile.txt";
	String ciphertextFile = "ciphertextFile.txt";
 
	FileInputStream fis = new FileInputStream(cleartextFile);
	FileOutputStream fos = new FileOutputStream(ciphertextFile);
	CipherOutputStream cos = new CipherOutputStream(fos, cipher);
 
	byte[] block = new byte[8];
	int i;
	while ((i = fis.read(block)) != -1) {
	    cos.write(block, 0, i);
	}
	cos.close();
 
	// Decrypt
 
	String cleartextAgainFile = "cleartextAgainFile.txt";
 
	cipher.init(Cipher.DECRYPT_MODE, secKey);
 
	fis = new FileInputStream(ciphertextFile);
	CipherInputStream cis = new CipherInputStream(fis, cipher);
	fos = new FileOutputStream(cleartextAgainFile);
 
	while ((i = cis.read(block)) != -1) {
	    fos.write(block, 0, i);
	}
	fos.close();
    }