MD5加密相关

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

namespace MD5加密
{
   public class MD5Fun
    {
       /// <summary>
       /// 加密字符串
       /// </summary>
       /// <param name="iptStr"></param>
       /// <returns></returns>
       public static string encryStr(string iptStr)
       {
           using (MD5 md5Hash = MD5.Create())
           {
             return  MD5Fun.GetMd5Hash(md5Hash,iptStr);
           }
       }

       /// <summary>
       /// 字符串构建
       /// </summary>
       /// <param name="md5Hash"></param>
       /// <param name="input"></param>
       /// <returns></returns>
       public static string GetMd5Hash(MD5 md5Hash,string input)
       {
           byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));

           StringBuilder sBuilder = new StringBuilder();

           for (int i = 0; i < data.Length;i++ )
           {
               sBuilder.Append(data[i].ToString("x2"));
           }
           return sBuilder.ToString();
       }

       /// <summary>
       /// 将给定的字符串按照指定的MD5格式装换后，与给定的密文进行比较
       /// </summary>
       /// <param name="md5Hash"></param>
       /// <param name="input"></param>
       /// <param name="hash"></param>
       /// <returns></returns>
       public static bool VerifyMd5Hash(MD5 md5Hash,string input,string hash)
       {
           string hashOfInput = GetMd5Hash(md5Hash,input);

           //OrdinalIgnoreCase  忽略大小写进行较
           StringComparer comparer = StringComparer.OrdinalIgnoreCase;

           // Compare  相同返回0，不同返回1
           var result = comparer.Compare(hashOfInput, hash); 
           if (0 == comparer.Compare(hashOfInput, hash))
           {
               return true;
           }
           else
           {
               return false;
           }
       }

       /// <summary>
       /// 比较字符串加密后  与给定的密文是否相同
       /// </summary>
       /// <param name="str"></param>
       /// <param name="md5Str"></param>
       /// <returns></returns>
       public static bool validateStr(string str,string md5Str)
       { 
          using(MD5 md5Hash = MD5.Create())
          {
              if (VerifyMd5Hash(md5Hash, str, md5Str))
              {
                  return true;
              }
              else
              {
                  return false;
              }
          }
       }
    }
}