文字的DES加密 MD5雜湊值 DSA的數字簽名 (轉)

文字的DES加密 MD5雜湊值 DSA的數字簽名 (轉)[@more@]

文字的DES
為了對稱加密的，我將密碼進行封裝，先新建一個用於儲存密碼的類庫cl：
using System;
using System.Text ;
namespace cl
{
 ///

 /// Class1 的摘要說明。
 ///

 public class Class1
 {
 public Class1()
 {
 

 }
 public string getiv()
 {
 string iv="********";//八位
 return iv;
 }
 public string getkey()
 {
 string key="01160129";//八位
 return key;
 }

 }
}

然後新建專案（）
在 .中
using cl;
namespace test//給一個文字產生一個雜湊值
{
 ///

 /// computehash 的摘要說明。
 ///

 public class computehash : System..UI.Page
 {
 protected System.Web.UI.WebControls.Label Label1;
 protected System.Web.UI.WebControls.TextBox TextBox1;
 protected System.Web.UI.WebControls.Button Button1;
 protected System.Web.UI.WebControls.TextBox TextBox3;
 protected System.Web.UI.WebControls.Button Button2;
 protected System.Web.UI.WebControls.TextBox TextBox4;
 protected System.Web.UI.WebControls.Button Button3;
 protected System.Web.UI.WebControls.TextBox TextBox5;
 protected System.Web.UI.WebControls.Button Button4;
 protected System.Web.UI.WebControls.Button Button5;
 protected System.Web.UI.WebControls.Label Label2;
 protected System.Web.UI.WebControls.TextBox TextBox7;
 protected System.Web.UI.WebControls.Label Label3;
 protected System.Web.UI.WebControls.TextBox TextBox8;
 protected System.Web.UI.WebControls.TextBox TextBox9;
 protected System.Web.UI.WebControls.Label Label4;
 protected System.Web.UI.WebControls.Button Button6;
 protected System.Web.UI.WebControls.Label Label5;
 protected System.Web.UI.WebControls.TextBox TextBox2;
 
 
 private void Page_Load( sender, System.EventArgs e)
 {
 // 在此處放置程式碼以初始化頁面
 }

 #region Web 窗體設計器生成的程式碼
 overr protected void OnInit(EventArgs e)
 {
 //
 // CODEGEN: 該是 Web 窗體設計器所必需的。
 //
 InitializeComponent();
 base.OnInit(e);
 }
 
 ///

 /// 設計器支援所需的方法 - 不要使用程式碼編輯器修改
 /// 此方法的內容。
 ///

 private void InitializeComponent()
 { 
 this.Button2.Click += new System.EventHandler(this.Button2_Click);
 this.Button1.Click += new System.EventHandler(this.Button1_Click);
 this.Button3.Click += new System.EventHandler(this.Button3_Click);
 this.Button4.Click += new System.EventHandler(this.Button4_Click);
 this.Button5.Click += new System.EventHandler(this.Button5_Click);
 this.Button6.Click += new System.EventHandler(this.Button6_Click);
 this.Load += new System.EventHandler(this.Page_Load);

 }
 #endregion

 private void Button1_Click(object sender, System.EventArgs e)
 {
 byte[] bt=UTF8Encoding.UTF8.GetBytes(TextBox1.Text );//UTF8需要對Text的引用
  MD5CryptoServiceProvider objMD5;
    objMD5=new MD5CryptoServiceProvider ();
 byte[] output=objMD5.ComputeHash (bt);
 TextBox2.Text =BitConverter.ToString (output);
 }

 private void Button2_Click(object sender, System.EventArgs e)
 {
 byte[] bt=UTF8Encoding.UTF8.GetBytes(TextBox1.Text );//UTF8需要對Text的引用
 MD5CryptoServiceProvider objMD5;
 objMD5=new MD5CryptoServiceProvider ();
 byte[] output=objMD5.ComputeHash (bt);
 TextBox4.Text =BitConverter.ToString (output); 
 }

 private void Button3_Click(object sender, System.EventArgs e)
 {
 Class1 cl=new Class1 ();
 string iv1=cl.getiv ();
 string key1=cl.getkey ();

 byte[] iv=UTF8Encoding.UTF8 .GetBytes (iv1);
 byte[] key=UTF8Encoding.UTF8 .GetBytes (key1);
 byte[] =UTF8Encoding.UTF8 .GetBytes (TextBox1.Text );
 //定義加密
 DESCryptoServiceProvider objdes;
  objdes=new DESCryptoServiceProvider ();
 //設定加密物件值
 objdes.IV =iv;
 objdes.Key =key;
 //建立加密器物件
 ICryptoTranoobjEncryptor;
 objEncryptor=objdes.CreateEncryptor (objdes.Key ,objdes.IV );
  //準備將加密的文字寫入secret.txt中
 FileStream objfs;
 objfs=new FileStream (MapPath("secret.txt"),FileMode.Create ,FileAccess.Write );
  //寫入
 CryptoStream cryptostream;
 cryptostream=new CryptoStream (objfs,objEncryptor,CryptoStreamMode.Write );
 cryptostream.Write (source,0,source.Length );
 cryptostream.Close ();
 }

 private void Button4_Click(object sender, System.EventArgs e)
 {
 Class1 cl=new Class1 ();
 string iv1=cl.getiv ();
 string key1=cl.getkey ();
 
 byte[] iv=UTF8Encoding.UTF8 .GetBytes (iv1);
 byte[] key=UTF8Encoding.UTF8 .GetBytes (key1);
 byte[] source=UTF8Encoding.UTF8 .GetBytes (TextBox1.Text );
 //定義加密物件
 DESCryptoServiceProvider objdes;
 objdes=new DESCryptoServiceProvider ();
 //設定加密物件值
 objdes.IV =iv;
 objdes.Key =key;
 //建立加密器物件
 ICryptoTransform objEncryptor;
 objEncryptor=objdes.CreateEncryptor (objdes.Key ,objdes.IV );
 //寫到
 MemoryStream ms=new MemoryStream ();
 CryptoStream cs=new CryptoStream (ms,objEncryptor,CryptoStreamMode.Write );
 cs.Write (source,0,source.Length );
 cs.FlushFinalBlock ();
 ms.Close ();
 TextBox5.Text =BitConverter.ToString (ms.ToArray ());

 }

 private void Button5_Click(object sender, System.EventArgs e)
 {
 DSACryptoServiceProvider objdsa;
 objdsa=new DSACryptoServiceProvider ();
  byte[] source=UTF8Encoding.UTF8 .GetBytes (TextBox1.Text );
 //公開秘鑰
 TextBox8.Text =objdsa.ToString (false);
 //私有秘鑰
 TextBox9.Text =objdsa.ToXmlString (true);
 //數字簽名
 TextBox7.Text =BitConverter.ToString (objdsa.SignData (source));
 }

 }
}