import java.security.MessageDigest;
import java.util.ArrayList;
import java.util.Random;


public class ExperimentMain
{
    static ArrayList<Account> accountsList = new ArrayList<Account>();

    public static void main(String[] args)
    {
        try
        {
            createAccount("trentv4", "password");
            checkAccount("trentv4", "password");
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

    public static void checkAccount(String user, String password)
    {
        for(int i = 0; i < accountsList.size(); i++)
        {
            if(accountsList.get(i).username.equals(user))
            {
                Account act = accountsList.get(i);
                if(act.hash.equals(sha1(act.salt+password)))
                {
                    System.out.println("Test");
                }
            }
        }
    }

    public static void createAccount(String user, String password)
    {
        Account account;
        String salt = "";
        Random random = new Random();
        for(int i = 0; i < 10; i++)
        {
            salt += random.nextInt(10);
        }
        account = new Account(user, sha1(salt+password), salt);
        accountsList.add(account);
    }

    static String sha1(String input)
    {
        try
        {
            MessageDigest mDigest = MessageDigest.getInstance("SHA1");
            byte[] result = mDigest.digest(input.getBytes());
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < result.length; i++)
            {
                sb.append(Integer.toString((result[i] & 0xff) + 0x100, 16).substring(1));
            }

            return sb.toString();
        }
        catch(Exception e)
        {
            e.printStackTrace();
            return "";
        }
    }
}