c# md5加密、RSA加解密方式

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;

namespace CSSTUDY
{
    /// 

    /// 加密方式汇总
    /// 
    class Code
    {

        public static CspParameters param;


        /// 

        /// 对字符串进MD5加密
        /// 
        /// 源类型
        /// 加密后字符串
        public static string Md5Encrypt(string sourceStr)
        {
            MD5 md5 = new MD5CryptoServiceProvider();
            //将要加密的字符串转换成字节数组
            byte[] palindata = Encoding.Default.GetBytes(sourceStr);
            //通过字节数组进行加密
            byte[] encryptdata = md5.ComputeHash(palindata);
            //将加密后的字节数组转换成字符串
            string returnData = Convert.ToBase64String(encryptdata);
            return returnData;
        }


        /// 

        /// 进行 RSA 加密
        /// 
        /// 源字符串
        /// 加密后字符串
        public static string RsaEncrypt(string sourceStr)
        {
            param = new CspParameters();
            //密匙容器的名称，保持加密解密一致才能解密成功
            param.KeyContainerName = "Navis";
            using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param))
            {
                //将要加密的字符串转换成字节数组
                byte[] plaindata = Encoding.Default.GetBytes(sourceStr);
                //通过字节数组进行加密
                byte[] encryptdata = rsa.Encrypt(plaindata, false);
                //将加密后的字节数组转换成字符串
                return Convert.ToBase64String(encryptdata);
            }
        }

        /// 

        /// 通过RSA 加密方式进行解密
        /// 
        /// 加密字符串
        /// 解密后字符串
        public static string RsaDesEncrypt(string codingStr)
        {
            param = new CspParameters();
            param.KeyContainerName = "Navis";
            using(RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param))
            {
                byte[] encryptdata = Convert.FromBase64String(codingStr);
                byte[] decryptdata = rsa.Decrypt(encryptdata, false);
                return Encoding.Default.GetString(decryptdata);
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CSSTUDY
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Code.Md5Encrypt("navis"));
            Console.ReadKey();
            string pwd = Code.RsaEncrypt("Navis_123");
            Console.WriteLine(pwd);
            Console.ReadKey();
            Console.WriteLine(Code.RsaDesEncrypt(pwd));
            Console.ReadKey();
        }
    }
}