MD5加密帮助类

MD5加密帮助类

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

namespace Components.Helper.Security
{
    public class MD5Helper
    {
        private static string Encrypt_MD5(string AppKey)
        {
            MD5 MD5 = new MD5CryptoServiceProvider();
            byte[] datSource = Encoding.GetEncoding("gb2312").GetBytes(AppKey);
            byte[] newSource = MD5.ComputeHash(datSource);
            StringBuilder sb = new StringBuilder(32);
            for (int i = 0; i < newSource.Length; i++)
            {
                sb.Append(newSource[i].ToString("x").PadLeft(2, '0'));
            }
            string crypt = sb.ToString();
            return crypt;
        }

        //MD5加密
        public static string MD5(string str)
        {
            //（取32替换若干字符，防破解）
            string returnStr;
            returnStr = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").ToUpper();
            returnStr = returnStr.Replace("1", "");
            returnStr = returnStr.Replace("3", "");
            returnStr = returnStr.Replace("5", "");
            returnStr = returnStr.Replace("7", "");
            returnStr = returnStr.Replace("9", "");
            return returnStr;
        }
    }
}