c# MD5及盐值加密

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web;
 
namespace sci_project
{
    public static class PasswordHelper
    {
        /// <summary> 
        /// MD5 加密字符串 
        /// </summary> 
        /// <param name="rawPass">源字符串</param> 
        /// <returns>加密后字符串</returns> 
        private static string MD5Encoding(string rawPass)
        {
            // 创建MD5类的默认实例：MD5CryptoServiceProvider 
            MD5 md5 = MD5.Create();
            byte[] bs = Encoding.UTF8.GetBytes(rawPass);
            byte[] hs = md5.ComputeHash(bs);
            StringBuilder stb = new StringBuilder();
            foreach (byte b in hs)
            {
                // 以十六进制格式格式化 
                stb.Append(b.ToString("x2"));
            }
            return stb.ToString();
        }
 
        /// <summary> 
        /// MD5盐值加密 
        /// </summary> 
        /// <param name="rawPass">源字符串</param> 
        /// <param name="salt">盐值</param> 
        /// <returns>加密后字符串</returns> 
        public static string MD5Encoding(string rawPass, object salt)
        {
            if (salt == null) return rawPass;
            return MD5Encoding(rawPass + "{" + salt.ToString() + "}");
        } 
    }
}