Uncompilable source code - Erroneous sym type: Utils.createFixedRandom?

[Akirien]

Hello there. I got this code for El Gamal algorithm but it's not working. The error is as stated in title.

package crypto;

import java.security.AlgorithmParameterGenerator;
import java.security.AlgorithmParameters;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import java.util.*; 
import javax.crypto.Cipher;
import javax.crypto.spec.DHParameterSpec;

/**
 * El Gamal example with random key generation.
 */
public class Crypto
{
    public static void main(String[] args) throws Exception
    {
        byte[]           input = new byte[] { (byte)0xbe, (byte)0xef };
        Cipher           cipher = Cipher.getInstance(
                                             "ElGamal/None/NoPadding", "BC");
        SecureRandom     random = Utils.createFixedRandom();

        // create the parameters
        AlgorithmParameterGenerator apg = AlgorithmParameterGenerator.getInstance(
                                                                 "ElGamal", "BC");

        apg.init(256, random);

        AlgorithmParameters     params = apg.generateParameters();
        AlgorithmParameterSpec  dhSpec = params.getParameterSpec(
                                                            DHParameterSpec.class);

        // create the keys
        KeyPairGenerator generator = KeyPairGenerator.getInstance("ElGamal", "BC");

        generator.initialize(dhSpec, random);

        KeyPair          pair = generator.generateKeyPair();
        Key              pubKey = pair.getPublic();
        Key              privKey = pair.getPrivate();

        System.out.println("input : " + Utils.toHex(input));

        // encryption step

        cipher.init(Cipher.ENCRYPT_MODE, pubKey, random);

        byte[] cipherText = cipher.doFinal(input);

        System.out.println("cipher: " + Utils.toHex(cipherText));

        // decryption step

        cipher.init(Cipher.DECRYPT_MODE, privKey);

        byte[] plainText = cipher.doFinal(cipherText);

        System.out.println("plain : " + Utils.toHex(plainText));
    }
}

Thanks in advance :D

[Norm]

Where is the Utils class defined? The compiler can not find its definition.
Is it in a package that you need to import?

[Akirien]

Where is the Utils class defined? The compiler can not find its definition.
Is it in a package that you need to import?

I dont know, I got this code from Beginning Cryptography for JAVA books. :(

[Tolls]

Then I would check in that book and see whether there's a resources section or web link to code associated with the examples.

[Norm]

If you do not have the definitions for that class, you will have to figure out if there is a similar class in the Java SE classes and change the code to use the Java SE class.

Check the book's appendix or its website for the class's definition.

[DarrylBurke]

Moving to New to Java. Inability to compile source code doesn't belong in Advanced Java.

db