C#实现简单的RSA非对称加密算法示例

本文实例讲述了C#实现简单的RSA非对称加密算法。分享给大家供大家参考，具体如下：

界面控件

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									namespace RSA算法

									{

									  partial class Form1

									  {

									    /// <summary>

									    /// 必需的设计器变量。

									    /// </summary>

									    private System.ComponentModel.IContainer components = null;

									    /// <summary>

									    /// 清理所有正在使用的资源。

									    /// </summary>

									    /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>

									    protected override void Dispose(bool disposing)

									    {

									      if (disposing && (components != null))

									      {

									        components.Dispose();

									      }

									      base.Dispose(disposing);

									    }

									    #region Windows 窗体设计器生成的代码

									    /// <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.StrBox = new System.Windows.Forms.TextBox();

									      this.label1 = new System.Windows.Forms.Label();

									      this.PubKeyBox = new System.Windows.Forms.TextBox();

									      this.label2 = new System.Windows.Forms.Label();

									      this.PrvKeyBox = new System.Windows.Forms.TextBox();

									      this.label3 = new System.Windows.Forms.Label();

									      this.EncrypeBox = new System.Windows.Forms.TextBox();

									      this.label4 = new System.Windows.Forms.Label();

									      this.label5 = new System.Windows.Forms.Label();

									      this.Str2Box = new System.Windows.Forms.TextBox();

									      this.CrypeBtn = new System.Windows.Forms.Button();

									      this.SuspendLayout();

									      //

									      // StrBox

									      //

									      this.StrBox.Location = new System.Drawing.Point(115, 12);

									      this.StrBox.Name = "StrBox";

									      this.StrBox.Size = new System.Drawing.Size(258, 21);

									      this.StrBox.TabIndex = 0;

									      //

									      // label1

									      //

									      this.label1.AutoSize = true;

									      this.label1.Location = new System.Drawing.Point(11, 18);

									      this.label1.Name = "label1";

									      this.label1.Size = new System.Drawing.Size(77, 12);

									      this.label1.TabIndex = 1;

									      this.label1.Text = "加密前的明文";

									      //

									      // PubKeyBox

									      //

									      this.PubKeyBox.Location = new System.Drawing.Point(115, 78);

									      this.PubKeyBox.Multiline = true;

									      this.PubKeyBox.Name = "PubKeyBox";

									      this.PubKeyBox.Size = new System.Drawing.Size(258, 74);

									      this.PubKeyBox.TabIndex = 2;

									      //

									      // label2

									      //

									      this.label2.AutoSize = true;

									      this.label2.Location = new System.Drawing.Point(11, 87);

									      this.label2.Name = "label2";

									      this.label2.Size = new System.Drawing.Size(29, 12);

									      this.label2.TabIndex = 3;

									      this.label2.Text = "公钥";

									      //

									      // PrvKeyBox

									      //

									      this.PrvKeyBox.Location = new System.Drawing.Point(115, 158);

									      this.PrvKeyBox.Multiline = true;

									      this.PrvKeyBox.Name = "PrvKeyBox";

									      this.PrvKeyBox.Size = new System.Drawing.Size(258, 128);

									      this.PrvKeyBox.TabIndex = 4;

									      //

									      // label3

									      //

									      this.label3.AutoSize = true;

									      this.label3.Location = new System.Drawing.Point(13, 167);

									      this.label3.Name = "label3";

									      this.label3.Size = new System.Drawing.Size(101, 12);

									      this.label3.TabIndex = 5;

									      this.label3.Text = "密钥（包含私钥）";

									      //

									      // EncrypeBox

									      //

									      this.EncrypeBox.Location = new System.Drawing.Point(115, 292);

									      this.EncrypeBox.Name = "EncrypeBox";

									      this.EncrypeBox.Size = new System.Drawing.Size(258, 21);

									      this.EncrypeBox.TabIndex = 6;

									      //

									      // label4

									      //

									      this.label4.AutoSize = true;

									      this.label4.Location = new System.Drawing.Point(14, 299);

									      this.label4.Name = "label4";

									      this.label4.Size = new System.Drawing.Size(29, 12);

									      this.label4.TabIndex = 7;

									      this.label4.Text = "密文";

									      //

									      // label5

									      //

									      this.label5.AutoSize = true;

									      this.label5.Location = new System.Drawing.Point(14, 329);

									      this.label5.Name = "label5";

									      this.label5.Size = new System.Drawing.Size(77, 12);

									      this.label5.TabIndex = 8;

									      this.label5.Text = "解密后的明文";

									      //

									      // Str2Box

									      //

									      this.Str2Box.Location = new System.Drawing.Point(115, 320);

									      this.Str2Box.Name = "Str2Box";

									      this.Str2Box.Size = new System.Drawing.Size(258, 21);

									      this.Str2Box.TabIndex = 9;

									      //

									      // CrypeBtn

									      //

									      this.CrypeBtn.Location = new System.Drawing.Point(117, 43);

									      this.CrypeBtn.Name = "CrypeBtn";

									      this.CrypeBtn.Size = new System.Drawing.Size(104, 23);

									      this.CrypeBtn.TabIndex = 10;

									      this.CrypeBtn.Text = "执行加密解密";

									      this.CrypeBtn.UseVisualStyleBackColor = true;

									      this.CrypeBtn.Click += new System.EventHandler(this.CrypeBtn_Click);

									      //

									      // Form1

									      //

									      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);

									      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

									      this.ClientSize = new System.Drawing.Size(385, 353);

									      this.Controls.Add(this.CrypeBtn);

									      this.Controls.Add(this.Str2Box);

									      this.Controls.Add(this.label5);

									      this.Controls.Add(this.label4);

									      this.Controls.Add(this.EncrypeBox);

									      this.Controls.Add(this.label3);

									      this.Controls.Add(this.PrvKeyBox);

									      this.Controls.Add(this.label2);

									      this.Controls.Add(this.PubKeyBox);

									      this.Controls.Add(this.label1);

									      this.Controls.Add(this.StrBox);

									      this.Name = "Form1";

									      this.Text = "RSA非对称加密解密";

									      this.ResumeLayout(false);

									      this.PerformLayout();

									    }

									    #endregion

									    private System.Windows.Forms.TextBox StrBox;

									    private System.Windows.Forms.Label label1;

									    private System.Windows.Forms.TextBox PubKeyBox;

									    private System.Windows.Forms.Label label2;

									    private System.Windows.Forms.TextBox PrvKeyBox;

									    private System.Windows.Forms.Label label3;

									    private System.Windows.Forms.TextBox EncrypeBox;

									    private System.Windows.Forms.Label label4;

									    private System.Windows.Forms.Label label5;

									    private System.Windows.Forms.TextBox Str2Box;

									    private System.Windows.Forms.Button CrypeBtn;

									  }

									}

RSA代码

				?

									using System;

									using System.Collections.Generic;

									using System.ComponentModel;

									using System.Data;

									using System.Drawing;

									using System.Linq;

									using System.Text;

									using System.Windows.Forms;

									using System.Security.Cryptography;

									namespace RSA算法

									{

									  public partial class Form1 : Form

									  {

									    public Form1()

									    {

									      InitializeComponent();

									    }

									    private void CrypeBtn_Click(object sender, EventArgs e)

									    {

									      //创建RSA加密算法服务提供者

									      RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

									      //显示公钥和私钥

									      PubKeyBox.Text = RSA.ToXmlString(false);

									      PrvKeyBox.Text = RSA.ToXmlString(true);

									      //执行加密

									      byte[] EncrypeBytes = RSA.Encrypt(Encoding.UTF8.GetBytes(StrBox.Text), true);

									      EncrypeBox.Text = Encoding.UTF8.GetString(EncrypeBytes);

									      //执行解密

									      byte[] DecrypeBytes = RSA.Decrypt(EncrypeBytes, true);

									      Str2Box.Text = Encoding.UTF8.GetString(DecrypeBytes);

									    }

									  }

									}