C#实现简单的RSA非对称加密算法示例

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;
  }
}

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);
    }
  }
}