有私匙在ASP.NET中怎么RSA解密

Question

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;namespace NetSkycn.Security
{
    /// <summary>
    /// 实现RSA加密和解密的类
    ///作者：周公
    ///编写时间：2007-3-18
   ///网址：http://blog.csdn.net/zhoufoxcn
    /// </summary>
    public class RSAEncrypt
    {
        private RSAEncrypt()
        {
        }
        /// <summary>
        /// RSA加密
        /// </summary>
        /// <param name="encryptString">要加密的字符串</param>
        /// <returns></returns>
        public static string Encrypt(string encryptString)
        {
            if(string.IsNullOrEmpty(encryptString))
            {
                throw new ArgumentNullException("encryptString", "不能为空");
            }
            RSA rsa = RSA.Create();
            byte[] encryptByte=Encoding.UTF8.GetBytes(encryptString);
            byte[] decryptByte=rsa.EncryptValue(encryptByte);
            return Convert.ToBase64String(decryptByte);
        }
        /// <summary>
        /// RSA解密
        /// </summary>
        /// <param name="decryptString">要解密的字符串</param>
        /// <returns></returns>
        public static string Decrypt(string decryptString)
        {
            if (string.IsNullOrEmpty(decryptString))
            {
                throw new ArgumentNullException("decryptString", "不能为空");
            }
            byte[] decryptByte = Convert.FromBase64String(decryptString);
            RSA rsa = RSA.Create();
            byte[] encryptByte = rsa.DecryptValue(decryptByte);
            return Encoding.UTF8.GetString(encryptByte);
        }
    }
}

Answer 1

MD5
using System.Security.Cryptography;
using System.Text;
 
 
    string MD5(string input,int coda)
    {
        MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
        byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
        StringBuilder sBuilder = new StringBuilder();
        int i;
        if(coda==16){
            for(i=4;i <=11;i++){
                sBuilder.Append(data[i].ToString("x2"));
            }
        }
        else{
            for (i = 0; i <= 15; i++) {
                sBuilder.Append(data[i].ToString("x2"));
            }
 
        }
        return sBuilder.ToString();
 
    }