C#中用RSA算法生成公钥和私钥

最新推荐文章于 2025-04-01 01:15:00 发布

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最新推荐文章于 2025-04-01 01:15:00 发布

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原文链接：https://www.cnblogs.com/micenote/p/7862989.html

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本文介绍如何使用C#中的RSA算法生成公钥和私钥，并提供了两种方法实现。此外，还详细展示了如何利用生成的密钥进行数据的加密和解密过程。

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转自：https://www.cnblogs.com/micenote/p/7862989.html

C#中用RSA算法生成公钥和私钥

方法一：

公钥密钥生成后，保存在同名文件夹下面，如下图：

公钥密钥生成，所在路径【RSA\RSA\bin\Debug】

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using System;
using System.IO;
using System.Security.Cryptography;//必须引用

namespace RSA
{
    class Program
    {
        static void Main(string[] args)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            using (StreamWriter writer = new StreamWriter("PrivateKey.xml"))  //这个文件要保密...
            {
                writer.WriteLine(rsa.ToXmlString(true));
            }
            using (StreamWriter writer = new StreamWriter("PublicKey.xml"))
           {
                writer.WriteLine(rsa.ToXmlString(false));
           }
        }
    }
}

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方法二：

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    public static void GKEY()//(计算机)生成密钥 GKEY(generate key),generate the RSA public and private keys
    {
        using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
        {
            string publicKey = rsa.ToXmlString(false); // 公钥
            string privateKey = rsa.ToXmlString(true); // 私钥
        }
    }

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直接断点调式复制公钥密钥出来用

RSA加密解密类

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#region RSA
    /// <summary>
    /// RSA加密
    /// </summary>
    /// <param name="publickey"></param>
    /// <param name="content"></param>
    /// <returns></returns>
    public static string RSAEncrypt(string publickey, string content)
    {
        publickey = @"<RSAKeyValue><Modulus>0wE26IHp4U9OLtPhJ+fT8ej6aWORFP8pd++MjUuhkQQm/zhcImbxQbjxtSAftz+kkDwGDFJpSldQPyigOGcUx7PofTc6VhiFik9E9SsxV9n0iEEtqUndDfmBJfPAWt+4UDMwKakgZqFoapDuwjKlTErFvKCyKCs+qN9OZvZwKWk=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
        byte[] cipherbytes;
        rsa.FromXmlString(publickey);
        cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false);

        return Convert.ToBase64String(cipherbytes);

    }

    /// <summary>
    /// RSA解密
    /// </summary>
    /// <param name="privatekey"></param>
    /// <param name="content"></param>
    /// <returns></returns>
    public static string RSADecrypt(string privatekey, string content)
    {
        privatekey = @"<RSAKeyValue><Modulus>0wE26IHp4U9OLtPhJ+fT8ej6aWORFP8pd++MjUuhkQQm/zhcImbxQbjxtSAftz+kkDwGDFJpSldQPyigOGcUx7PofTc6VhiFik9E9SsxV9n0iEEtqUndDfmBJfPAWt+4UDMwKakgZqFoapDuwjKlTErFvKCyKCs+qN9OZvZwKWk=</Modulus><Exponent>AQAB</Exponent><P>8Ei6NIsZtgV3DQjuGHfGLS6o1O+IUXxzjqLxdMm77yhEPUxR9YPIxODJ2VVTddXSAHxViJJt30yJ7JhVz6cpQw==</P><Q>4M49NrmalgVQFMsea2RMB1qN8fAPfIw5G9q9hzsLcWSCmkeRRIQlvPYflVEKAYKiDVVzENETbnnduFXWBABx4w==</Q><DP>t+JQbemN0Zi5FQaif6MZzHYKynpNTl75aE0Wj5Pa+RlNr8N6bXNe8Bw/HM2Jw4HQ5oJASvYUk3DVlHS4JuP8VQ==</DP><DQ>lT62iv9brp9mU/epgVh71SH8PJPIZEJfo6tryjyb0zMMNcqvmZI1z6aCv0mm3+vPFBUXqCF1yhFj7n4l8FAvSw==</DQ><InverseQ>flrvgxHvf4l+fdymEVDgKjsfGqshOpppoNgZj9kpeWBto3o8z++Ki6eSLQT3nVnpx2QCZeTWkxTED4nhSLKscw==</InverseQ><D>cQTCg1Eqk7sltmFYxUYgOP/AOPjSufteG9acYwYymPkvZh6rAuY+rSRBmvGE62NUYskzuB/gM6iG2/2HrA5SixfNgCvZ+nsK+kX5pzQRsYdD71ViQW0hOanXwj45I2zHRgBiuTtCUP0fs5pISmQkaeJkDL5pO2l+wvlgl+wunj0=</D></RSAKeyValue>";
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
        byte[] cipherbytes;
        rsa.FromXmlString(privatekey);
        cipherbytes = rsa.Decrypt(Convert.FromBase64String(content), false);

        return Encoding.UTF8.GetString(cipherbytes);
    }
    #endregion

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