文本的DES加密 MD5散列值 DSA的数字签名

作者：未知文本的DES加密为了对称加密的安全，将密码进行封装，先新建一个用于保存密码的类库cl：usC#

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作者：未知

文本的DES加密 为了对称加密的安全，将密码进行封装，先新建一个用于保存密码的类库cl： using System; using System.Text ; namespace cl {  /// <summary>  /// Class1 的摘要说明。  /// </summary>  public class Class1  {   public Class1()   {

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

 } }

然后新建asp.net项目（C#） 在 .aspx中 using cl; namespace test//给一个文本产生一个散列值 {  /// <summary>  /// computehash 的摘要说明。  /// </summary>  public class computehash : System.Web.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(object sender, System.EventArgs e)   {    // 在此处放置用户代码以初始化页面   }

  #region Web 窗体设计器生成的代码   override protected void OnInit(EventArgs e)   {    //    // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。    //    InitializeComponent();    base.OnInit(e);   }   /// <summary>   /// 设计器支持所需的方法 - 不要使用代码编辑器修改   /// 此方法的内容。   /// </summary>   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需要对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需要对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[] source=UTF8Encoding.UTF8 .GetBytes (TextBox1.Text );    //定义加密对象    DESCryptoServiceProvider objdes;             objdes=new DESCryptoServiceProvider ();    //设置加密对象值    objdes.IV =iv;    objdes.Key =key;    //创建加密器对象    ICryptoTransform objEncryptor;    objEncryptor=objdes.CreateEncryptor (objdes.Key ,objdes.IV );             //准备将加密的文本写入secret.txt中    FileStream objfs;    objfs=new FileStream (MapPath("secret.txt"),FileMode.Create ,FileAccess.Write );             //写入    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 );    //定义加密对象    DESCryptoServiceProvider objdes;    objdes=new DESCryptoServiceProvider ();    //设置加密对象值    objdes.IV =iv;    objdes.Key =key;    //创建加密器对象    ICryptoTransform objEncryptor;    objEncryptor=objdes.CreateEncryptor (objdes.Key ,objdes.IV );    //写到内存    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 );    //公开秘钥    TextBox8.Text =objdsa.ToXmlString (false);    //私有秘钥    TextBox9.Text =objdsa.ToXmlString (true);    //数字签名    TextBox7.Text =BitConverter.ToString (objdsa.SignData (source));   }

  } }

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