■ CD 키를 확인하는 방법을 보여준다.
▶ MainForm.cs
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using System; using System.Management; using System.Security.Cryptography; using System.Text; using System.Windows.Forms; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 문자 배열 /// </summary> private char[] characterArray = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' }; /// <summary> /// MAC 주소 /// </summary> private string macAddress; /// <summary> /// CD 키 /// </summary> private string cdKey; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); #region 이벤트를 설정한다. Load += Form_Load; this.key1TextBox.TextChanged += key1TextBox_TextChanged; this.key2TextBox.TextChanged += key2TextBox_TextChanged; this.key3TextBox.TextChanged += key3TextBox_TextChanged; this.key4TextBox.TextChanged += key4TextBox_TextChanged; this.key5TextBox.TextChanged += key5TextBox_TextChanged; this.checkButton.Click += checkButton_Click; #endregion } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 폼 로드시 처리하기 - Form_Load(sender, e) /// <summary> /// 폼 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Load(object sender, EventArgs e) { ObjectQuery objectQuery = new ObjectQuery("SELECT * FROM Win32_NetworkAdapter"); ManagementObjectSearcher managementObjectSearcher = new ManagementObjectSearcher(objectQuery); foreach(ManagementObject managementObject in managementObjectSearcher.Get()) { if(managementObject["MACAddress"] != null) { this.macAddress = managementObject["MACAddress"].ToString().Replace(":", ""); } } } #endregion #region 키 1 텍스트 박스 텍스트 변경시 처리하기 - key1TextBox_TextChanged(sender, e) /// <summary> /// 키 1 텍스트 박스 텍스트 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void key1TextBox_TextChanged(object sender, EventArgs e) { if(this.key1TextBox.TextLength == 5) { this.key2TextBox.Focus(); } } #endregion #region 키 2 텍스트 박스 텍스트 변경시 처리하기 - key2TextBox_TextChanged(sender, e) /// <summary> /// 키 2 텍스트 박스 텍스트 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void key2TextBox_TextChanged(object sender, EventArgs e) { if(this.key2TextBox.TextLength == 5) { this.key3TextBox.Focus(); } } #endregion #region 키 3 텍스트 박스 텍스트 변경시 처리하기 - key3TextBox_TextChanged(sender, e) /// <summary> /// 키 3 텍스트 박스 텍스트 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void key3TextBox_TextChanged(object sender, EventArgs e) { if(this.key3TextBox.TextLength == 5) { this.key4TextBox.Focus(); } } #endregion #region 키 4 텍스트 박스 텍스트 변경시 처리하기 - key4TextBox_TextChanged(sender, e) /// <summary> /// 키 4 텍스트 박스 텍스트 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void key4TextBox_TextChanged(object sender, EventArgs e) { if(this.key4TextBox.TextLength == 5) { this.key5TextBox.Focus(); } } #endregion #region 키 5 텍스트 박스 텍스트 변경시 처리하기 - key5TextBox_TextChanged(sender, e) /// <summary> /// 키 5 텍스트 박스 텍스트 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void key5TextBox_TextChanged(object sender, EventArgs e) { if(this.key5TextBox.TextLength == 5) { this.checkButton.Focus(); } } #endregion #region 확인하기 버튼 클릭시 처리하기 - checkButton_Click(sender, e) /// <summary> /// 확인하기 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void checkButton_Click(object sender, EventArgs e) { string userName = this.userNameTextBox.Text.Trim(); if(string.IsNullOrEmpty(userName)) { MessageBox.Show ( this, "사용자명을 입력해 주시기 바랍니다.", "INFORMATION", MessageBoxButtons.OK, MessageBoxIcon.Information ); this.userNameTextBox.Focus(); return; } string key1 = this.key1TextBox.Text.Trim(); string key2 = this.key2TextBox.Text.Trim(); string key3 = this.key3TextBox.Text.Trim(); string key4 = this.key4TextBox.Text.Trim(); string key5 = this.key5TextBox.Text.Trim(); if(string.IsNullOrEmpty(key1) || string.IsNullOrEmpty(key2) || string.IsNullOrEmpty(key3) || string.IsNullOrEmpty(key4) || string.IsNullOrEmpty(key5)) { MessageBox.Show ( this, "CD 키를 입력해 주시기 바랍니다.", "INFORMATION", MessageBoxButtons.OK, MessageBoxIcon.Information ); return; } CalculateCDKey(); string cdKey = string.Format($"{key1}-{key2}-{key3}-{key4}-{key5}"); if(this.cdKey == cdKey) { this.resultLabel.Text = "CD 키가 일치합니다."; } else { this.resultLabel.Text = "CD 키가 일치하지 않습니다."; } } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region MD5 해시 구하기 - GetMD5Hash(text) /// <summary> /// MD5 해시 구하기 /// </summary> /// <param name="text">텍스트</param> /// <returns>MD5 해시</returns> private string GetMD5Hash(string text) { MD5 md5 = MD5CryptoServiceProvider.Create(); Byte[] hashAray = md5.ComputeHash(Encoding.Default.GetBytes(text)); StringBuilder stringBuilder = new StringBuilder(); for(int i = 0; i < hashAray.Length - 1; i++) { stringBuilder.AppendFormat("{0:x2}", hashAray[i]); } return stringBuilder.ToString(); } #endregion #region CD 키 계산하기 - CalculateCDKey() /// <summary> /// CD 키 계산하기 /// </summary> private void CalculateCDKey() { string yearString = DateTime.Now.Year.ToString(); string userName = this.userNameTextBox.Text.Trim(); string userNameMD5Hash = GetMD5Hash(userName); StringBuilder stringBuilder1 = new StringBuilder(); stringBuilder1.Append(this.characterArray[Convert.ToInt32(yearString) % 36]); stringBuilder1.Append(this.characterArray[Convert.ToInt32(yearString.Substring(0, 1))]); stringBuilder1.Append(this.characterArray[Convert.ToInt32(yearString.Substring(2, 1))]); stringBuilder1.Append(this.characterArray[Convert.ToInt32(yearString.Substring(3, 1))]); stringBuilder1.Append(this.macAddress); stringBuilder1.Append(this.macAddress.Substring(0, 1)); stringBuilder1.Append(this.macAddress.Substring(1, 1)); stringBuilder1.Append(userNameMD5Hash.Substring(0, 1)); stringBuilder1.Append(userNameMD5Hash.Substring(29, 1)); StringBuilder stringBuilder2 = new StringBuilder(); string keyList = stringBuilder1.ToString().ToUpper(); char[] keyArray = keyList.ToCharArray(); int[] keyValueArray = new int[keyArray.Length]; int add = DateTime.Now.Year; int z; int value0 = 0; int value1 = 0; int value2 = 0; int value3 = 0; int value4 = 0; for(int i = 0; i < keyArray.Length; i++) { z = (i + 10) * add; keyValueArray[i] = (int)keyArray[i]; stringBuilder2.Append(this.characterArray[(z ^ keyValueArray[i]) % 36]); if(((i + 1) % 5 == 0)) { stringBuilder2.Append("-"); } switch(i % 5) { case 0 : value0 += ((z ^ keyValueArray[i]) % 36); break; case 1 : value1 += ((z ^ keyValueArray[i]) % 36); break; case 2 : value2 += ((z ^ keyValueArray[i]) % 36); break; case 3 : value3 += ((z ^ keyValueArray[i]) % 36); break; case 4 : value4 += ((z ^ keyValueArray[i]) % 36); break; } } stringBuilder2.Append(this.characterArray[value0 % 36]); stringBuilder2.Append(this.characterArray[value1 % 36]); stringBuilder2.Append(this.characterArray[value2 % 36]); stringBuilder2.Append(this.characterArray[value3 % 36]); stringBuilder2.Append(this.characterArray[value4 % 36]); this.cdKey = stringBuilder2.ToString(); } #endregion } } |
