使用非对称RSA加密

最新推荐文章于 2025-02-27 07:00:00 发布

原创最新推荐文章于 2025-02-27 07:00:00 发布 · 535 阅读

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CC 4.0 BY-SA版权

文章标签：

#加密 #textbox #asp #string #server #div

本文提供了一个使用非对称RSA加密方法的示例，包括生成公钥和私钥、加密及解密过程。通过C#代码演示了如何实现这些功能。

using System;
using System.Security.Cryptography;
using System.Text;
using System.IO;

/// <summary>
/// 下面介绍如何使用非对称RSA加密的方法：
/// </summary>
public partial class test : System.Web.UI.Page
{

    //加密:
    public string  EncryptData(string data, string readpublickey)
    {
        RSACryptoServiceProvider crypt=new RSACryptoServiceProvider();
        UTF8Encoding enc=new UTF8Encoding();
        byte[] bytes=enc.GetBytes(data);
        crypt.FromXmlString(readpublickey);
        bytes=crypt.Encrypt(bytes, false);
        string encryttext=Convert.ToBase64String(bytes);
        return encryttext;
    }

    //解密:
    public string DecryptData(string data, string readprivatekey)
    {
        RSACryptoServiceProvider crypt=new RSACryptoServiceProvider();
        UTF8Encoding enc=new UTF8Encoding();
        byte[] bytes=Convert.FromBase64String(data);
        crypt.FromXmlString(readprivatekey);
        byte[] decryptbyte=crypt.Decrypt(bytes, false);
        string decrypttext=enc.GetString(decryptbyte);

        return decrypttext;
    }

    //制造公匙和私匙的方法如下
    public void CreateKey()
    {
        RSACryptoServiceProvider crypt=new RSACryptoServiceProvider();
        TxtPublicKey.Text=crypt.ToXmlString(false);  //公匙
        TxtPrivateKey.Text=crypt.ToXmlString(true);  //私匙

        msg.Text="成功保存公匙和密匙！";
    }

    protected void BtnCreate_Click(object sender, EventArgs e)
    {
         CreateKey();
    }
    protected void BtnEncrypt_Click(object sender, EventArgs e)
    {
        MyResult.Text=EncryptData(MyData.Text, TxtPublicKey.Text);
    }
    protected void BtnDecrypt_Click(object sender, EventArgs e)
    {
        MyData.Text=DecryptData(MyResult.Text, TxtPrivateKey.Text);
    }
}

<%@ Page AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" Language="C#"
    ValidateRequest="false" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
    <title>下面介绍如何使用非对称RSA加密的方法：</title></style>
</head>
<body>
    <form id="myform1" runat="server">
        <div id="content">
            <div class="rtblue">
                <div style="clear: both;">
                    <div>
                        <div>
                            <div class="grewbox">
                                下面介绍如何使用非对称RSA加密的方法：
                                <br />
                                <asp:Label ID="msg" runat="server" Text="" Width="70px"></asp:Label><br />
                                <table>
                                    <tr>
                                        <td style="width: 69px">
                                            共钥:</td>
                                        <td style="width: 100px">
                                            <asp:TextBox ID="TxtPublicKey" runat="server" Height="43px" TextMode="MultiLine"
                                                Width="440px"></asp:TextBox></td>
                                    </tr>
                                    <tr>
                                        <td style="width: 69px">
                                            私钥:</td>
                                        <td style="width: 100px">
                                            <asp:TextBox ID="TxtPrivateKey" runat="server" Height="45px" TextMode="MultiLine"
                                                Width="439px"></asp:TextBox></td>
                                    </tr>
                                </table>
                            </div>
                            <div class="newl">
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <asp:Button ID="BtnCreate" runat="server" Text="创建密码" OnClick="BtnCreate_Click" />
        <asp:Button ID="BtnEncrypt" runat="server" Text="加密" Width="44px" OnClick="BtnEncrypt_Click" />
        <asp:Button ID="BtnDecrypt" runat="server" Text="解密" Width="49px" OnClick="BtnDecrypt_Click" />
        <br />
        <table border="0" cellpadding="3" cellspacing="6">
            <tr>
                <td align="right">
                    明文数据</td>
                <td>
                    <span style="height: 58px;"> <asp:TextBox ID="MyData" runat="server"></asp:TextBox></span></td>
            </tr>
            <tr>
                <td align="right" valign="top">
                    密文数据</td>
                <td valign="top">
                    <asp:TextBox ID="MyResult" runat="server" Height="105px" TextMode="MultiLine" Width="414px"></asp:TextBox>
                </td>
            </tr>
        </table>
        <br />
    </form>
</body>
</html>