跨端使用MD5的两种编码方案总结

使用UTF8编码进行MD5计算

• 前端MD5计算代码

  <script src="cryptojs_v3.1.2/components/core.js" type="text/javascript" charset="utf-8"></script>
  <script src="cryptojs_v3.1.2/components/md5.js" type="text/javascript" charset="utf-8"></script>
  var md5= CryptoJS.MD5("90AZaz.,=哈喽"); 
  //result: 2dee0c28bee6b2e081703cf3c8aa1bea
  

  或者

  <script src="cryptojs_v3.1.2/rollups/md5.js" type="text/javascript" charset="utf-8"></script>
  var md5= CryptoJS.MD5("90AZaz.,=哈喽"); 
  //result: 2dee0c28bee6b2e081703cf3c8aa1bea
  

• 后端MD5计算代码（C#版）

      public static string ToMd5(this string data)
      {
          var bytes = System.Text.Encoding.UTF8.GetBytes(data);
          var md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
          var md5Bytes = md5.ComputeHash(bytes);
          StringBuilder sb = new StringBuilder();
          for (int i = 0; i < md5Bytes.Length; i++)
          {
              sb.Append(md5Bytes[i].ToString("x2"));
          }
          return sb.ToString();
      }
      var s = "90AZaz.,=哈喽";
      var result = s.ToMd5();
      // result: 2dee0c28bee6b2e081703cf3c8aa1bea
  

• T-SQL中MD5计算

      --T-SQL不支持UTF8格式字符串
  

使用UTF16编码进行MD5计算

• 前端MD5计算代码

  <script src="cryptojs_v3.1.2/components/core.js" type="text/javascript" charset="utf-8"></script>
  <script src="cryptojs_v3.1.2/components/enc-utf16.js" type="text/javascript" charset="utf-8"></script>
  <script src="cryptojs_v3.1.2/components/md5.js" type="text/javascript" charset="utf-8"></script>
  var md5= CryptoJS.MD5(CryptoJS.enc.Utf16LE.parse("90AZaz.,=哈喽"));
  //result: 840556163aff1e6e7d8e586d453ecdae
  

• 后端MD5计算代码（C#版）

      public static string ToMd5(this string data)
      {
          //.net中的unicode等价于utf-16，UTF-16<=>UTF-16LE，常见的编码如下：
          // 代码页，编码
          // 65000,UTF-7
          // 65001,UTF-8
          // 1200, UTF-16
          // 1201, UTF-16BE
          // 12000,UTF-32
          // 12001,UTF-32BE
          //所以，System.Text.Encoding.Unicode <=> System.Text.Encoding.GetEncoding(1200)
          //同理，System.Text.Encoding.UTF8 <=> System.Text.Encoding.GetEncoding(65001)
          var bytes = System.Text.Encoding.Unicode.GetBytes(data);
          var md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
          var md5Bytes = md5.ComputeHash(bytes);
          StringBuilder sb = new StringBuilder();
          for (int i = 0; i < md5Bytes.Length; i++)
          {
              sb.Append(md5Bytes[i].ToString("x2"));
          }
          return sb.ToString();
      }
      var s = "90AZaz.,=哈喽";
      var result = s.ToMd5();
      // result: 840556163aff1e6e7d8e586d453ecdae
  

• T-SQL中MD5计算

  SELECT SUBSTRING(sys.fn_sqlvarbasetostr(HASHBYTES( MD5 , N 90AZaz.,=哈喽 )), 3, 32)
  -- result: 840556163aff1e6e7d8e586d453ecdae