form1.cs

自己编写的密码破解程序 通过分析ServU 6.2.0.0的密码存储方法

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Globalization;



namespace Crack_ServU_6._._.__OTP_STORAG
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        
        //24402334336B3B23
        //306C2C3A3E6E6B6C
        //736A24233930326D
        //6C6B6E2B2D5F6C00
        byte[] key = {0x24, 0x40, 0x23, 0x34, 0x33, 0x6B, 0x3B, 0x23,
                      0x30, 0x6C, 0x2C, 0x3A, 0x3E, 0x6E, 0x6B, 0x6C,
                      0x73, 0x6A, 0x24, 0x23, 0x39, 0x30, 0x32, 0x6D,
                      0x6C, 0x6B, 0x6E, 0x2B, 0x2D, 0x5F, 0x6C, 0x00};//32个
        char[] trimChars = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
        
        private void button_crack_Click(object sender, EventArgs e)
        {
            string sCipher = textBox_Cipher.Text.Trim(' ').ToUpper();
            //MessageBox.Show("0x" + sCipher.Substring(6 * 2, 2));
            //return;
            if (sCipher.Length % 2 != 0) {
                MessageBox.Show("密文复制错误，长度不对!");
                return;
            }
            if (sCipher.Trim(trimChars).Length != 0) {
                MessageBox.Show("格式错误！");
                return;
            }
            if (sCipher.Length > 201) {
                MessageBox.Show("The evaluation version can only take password less than 8 character!");
                return;
            }
            textBox_plaintext.Text = "";
            for (int i = 0; i < sCipher.Length / 2; i++) {
                //int r = Convert.ToInt32("0x" + value.Substring(1, 2),16);
                //byte temp = Int32.Parse(sCipher);
                //byte temp = (byte)Convert.ToInt16("0x" + sCipher.Substring(i * 2 + 1, 2), 16) ^ key[i];
                Byte temp = (byte)(Byte.Parse(sCipher.Substring(i * 2, 2), NumberStyles.AllowHexSpecifier) ^ key[i % 32]);//
                //string sT = sCipher.Substring(i * 2, 2);
                //MessageBox.Show(sT);
                //byte temp = Byte.Parse(sT, NumberStyles.AllowHexSpecifier);
                textBox_plaintext.Text += Convert.ToChar(temp);
            }
                //textBox_plaintext.Text = "haha";

        }

        private void button1_Click(object sender, EventArgs e)
        {
            string sPlaintext = textBox_Cipher.Text;
            if (sPlaintext.Length > 101) {
                MessageBox.Show("The evaluation version can only take password less than 8 character!");
                return;
            }
            textBox_plaintext.Text = "";
            for (int i = 0; i < sPlaintext.Length; i++) {
                Byte temp = (byte)((byte)sPlaintext[i] ^ key[i % 32]);
                if (temp > 0x0F) {
                    textBox_plaintext.Text += Convert.ToString(temp, 16);
                }
                else {
                    textBox_plaintext.Text += "0" + Convert.ToString(temp, 16);
                }

            }
        }
    }
}