Blacklist.java

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;

class Blacklist {

	public static MessageDigest CRYPT;
	public static String[] HASHES = new String[] {"879f1dea801746b51a2a908b04f7fe6fff5f7a47", "5f2eceb54f642fb5f58abca0b52f7f0349f06cef", "a2e2be30dc9be014f171c8a3bbe955e55fd66d87"};

	public static String sha1(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException {
		if (CRYPT == null)
			CRYPT = MessageDigest.getInstance("SHA-1");

	    CRYPT.reset();
	    CRYPT.update(str.getBytes("UTF-8"));

	    return new BigInteger(1, CRYPT.digest()).toString(16);
	}

	public static void check(String ip) throws NoSuchAlgorithmException, UnsupportedEncodingException {
		String hash = sha1(ip);
		// System.out.println(String.format("%1$14s | %2$s", ip, hash));
		for (String str : HASHES) {
			if (str.equals(hash)) {
				System.out.println("Found: " + hash + " | " + ip);
			}
		}
	}

	public static void main(String[] args) throws NoSuchAlgorithmException, UnsupportedEncodingException {
		for (int a = 0; a <= 255; a++) {
			String aa = a + ".";
			for (int b = 0; b <= 255; b++) {
				String bb = aa + b + ".";
				for (int c = 0; c <= 255; c++) {
					// System.out.println(hash);
					check(bb + c);
				}
				check(bb + "*");
			}
			check(aa + "*");
			System.out.println(a);
		}
	}

}