generateSalt.java

public static final int SALT_LENGTH = 256;
private static final String RANDOM_ALGORITHM = "SHA1PRNG";

public String generateSalt() throws CryptoException {
            try {
                    SecureRandom random = SecureRandom.getInstance(RANDOM_ALGORITHM);
                    byte[] salt = new byte[SALT_LENGTH];
                    random.nextBytes(salt);
                    String saltHex = Util.HexEncoder.toHex(salt);
                    return saltHex;
            } catch (Exception e) {
                    throw new CryptoException("Unable to generate salt", e);
            }
    }