recover-mc-pwd.java

import java.io.*;
import java.util.*;
import javax.crypto.*;
import javax.crypto.spec.*;

public class mcreco {

    public static void main(String[] args) throws Exception {
        String p = "Path To Your lastlogin file for minecraft";
        String r = mcd(p);
        System.out.println(r);
    }
    
    public static String mcd(String p) throws Exception {
        PBEKeySpec pk = new PBEKeySpec("passwordfile".toCharArray());
        String ci = "PBEWithMD5AndDES";
        String output = null;
        Random random = new Random(43287234L);
        byte[] salt = new byte[8];
        random.nextBytes(salt);
        PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 5);
        SecretKey pbeKey = SecretKeyFactory.getInstance(ci).generateSecret(pk);
        Cipher cipher = Cipher.getInstance(ci);
        cipher.init(2, pbeKey, pbeParamSpec);

        DataInputStream dis = new DataInputStream(
                new CipherInputStream(
                        new FileInputStream(new File(p)), cipher));
        output = dis.readUTF() + " | " + dis.readUTF();
        dis.close();

        return output;
    }
}