Java for bit-squatting

DomainTest.java

import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.regex.Pattern;


public class DomainTest {
	
	private static String domainRegex = "^([a-zA-Z0-9]([a-zA-Z0-9\\-]{0,61}[a-zA-Z0-9])?\\.)+";
	
	public static void testOriginalDomain(String domain, String extension) throws UnsupportedEncodingException {
		String fullDomain = domain+"."+extension;
		byte[] bytes = null;;
		bytes = domain.getBytes("US-ASCII");
		for(int i=0; i<bytes.length; i++){
			for(int j=0; j<8; j++){
				byte[] testBytes = bytes.clone();
				byte flipper = (byte) (1 << j) ;
				//System.out.println("Flipper: "+flipper);
				testBytes[i] = (byte) ( flipper ^ testBytes[i] );
				String testDomain = new String(testBytes, "US-ASCII") + "." + extension;
				if(!Pattern.matches(domainRegex+extension, testDomain))
					continue;
				if(testDomain.toLowerCase().equals(fullDomain.toLowerCase()))
					continue;
				if(!domainIsRegistered(testDomain))
					System.out.println("Domain ["+testDomain+"] is NOT registered.");
			}
		}
	}
	
	public static boolean domainIsRegistered(String domain) {
		InetAddress address = null;
		try {
			address = InetAddress.getByName(domain);
		} catch (UnknownHostException e) {
			return false;
		}
		// open dns domain miss
		if(address.getHostAddress().equals("67.215.65.132"))
			return false;
		//System.out.println("["+domain+"] => ["+address+"]");
		return true;
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try {
			testOriginalDomain("microsoft", "com");
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}