杨中科老师 C#

        /// <summary>

        /// 把字符转换成MD5

        /// </summary>

        /// <param name="input"></param>

        /// <returns></returns>

        public static string GetMD5Hash(String str)

        {

                   //把字符串转换成字节数组

                   byte[] buffer = Encoding.Default.GetBytes(str);

                  MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();

                   //md5加密

                   byte[] cryptBuffer = md5.ComputeHash(buffer);

                   string s = "";

                   //把每一个字节 0-255，转换成两位16进制数

                   for (int i = ; i < cryptBuffer.Length; i++)

                   {

                           //大X转黄的是大写字母，小X转换的是小写字母

                           s += cryptBuffer[i].ToString("x2");

                   }

              return s;

        }

赵小虎老师 C#

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Security.Cryptography;

using System.IO;

namespace _02调用类库实现MD5值的计算

{

    class Program

    {

        static void Main(string[] args)

        {

            #region 计算字符串的MD5值

            //while (true)

            //{

            //    Console.WriteLine("请输入一个字符串");

            //    string msg = Console.ReadLine();

            //    string md5String = GetMD5FromString(msg);

            //    Console.WriteLine(md5String);

            //}

            #endregion

            #region 计算文件的Md5

            string path = @"d:\spring.xls";

            Console.WriteLine(GetMD5FromFile(path));

            Console.ReadLine();

            #endregion

        }

        /// <summary>

        /// 计算字符串的MD5值

        /// </summary>

        /// <param name="msg">要计算的字符串</param>

        /// <returns></returns>

        private static string GetMD5FromString(string msg)

        {

            //1.创建一个用来计算MD5值的类的对象

            using (MD5 md5 = MD5.Create())

            {

                //把字符串转换为byte[]

                //注意：如果字符串中包含汉字，则这里会把汉字使用utf-8编码转换为byte[]，当其他地方

                //计算MD5值的时候，如果对汉字使用了不同的编码，则同样的汉字生成的byte[]是不一样的，所以计算出的MD5值也就不一样了。

                byte[] msgBuffer = Encoding.Default.GetBytes(msg);

                //2.计算给定字符串的MD5值

                //返回值就是就算后的MD5值,如何把一个长度为16的byte[]数组转换为一个长度为32的字符串：就是把每个byte转成16进制同时保留2位即可。

                byte[] md5Buffer = md5.ComputeHash(msgBuffer);

                md5.Clear();//释放资源

                StringBuilder sbMd5 = new StringBuilder();

                for (int i = ; i < md5Buffer.Length; i++)

                {

                    sbMd5.Append(md5Buffer[i].ToString("x2"));

                }

                return sbMd5.ToString();

            }

        }

        private static string GetMD5FromFile(string path)

        {

            using (MD5 md5 = MD5.Create())

            {

                using (FileStream fsRead = File.OpenRead(path))

                {

                    byte[] bytes = md5.ComputeHash(fsRead);

                    md5.Clear();

                    StringBuilder sbMd5 = new StringBuilder();

                    for (int i = ; i < bytes.Length; i++)

                    {

                        sbMd5.Append(bytes[i].ToString("X2"));

                    }

                    return sbMd5.ToString();

                }

            }

        }

    }

}

JS  MD5加密

对  oldPwd 加密

hex_md5(oldPwd).toUpperCase()

JS文件：

/*

 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message

 * Digest Algorithm, as defined in RFC 1321.

 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.

 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet

 * Distributed under the BSD License

 * See http://pajhome.org.uk/crypt/md5 for more info.

 *

 *

 * 使用方法 hex_md5("1").toUpperCase()

 */

/*

 * Configurable variables. You may need to tweak these to be compatible with

 * the server-side, but the defaults work in most cases.

 */

var hexcase = ;  /* hex output format. 0 - lowercase; 1 - uppercase        */

var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */

var chrsz   = ;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

/*

 * These are the functions you'll usually want to call

 * They take string arguments and return either hex or base-64 encoded strings

 */

function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}

function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}

function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}

function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }

function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }

function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

/*

 * Perform a simple self-test to see if the VM is working

 */

function md5_vm_test()

{

  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";

}

/*

 * Calculate the MD5 of an array of little-endian words, and a bit length

 */

function core_md5(x, len)

{

  /* append padding */

  x[len >> ] |= 0x80 << ((len) % );

  x[(((len + ) >>> ) << ) + ] = len;

  var a =  ;

  var b = -;

  var c = -;

  var d =  ;

  for(var i = ; i < x.length; i += )

  {

    var olda = a;

    var oldb = b;

    var oldc = c;

    var oldd = d;

    a = md5_ff(a, b, c, d, x[i+ ],  , -);

    d = md5_ff(d, a, b, c, x[i+ ], , -);

    c = md5_ff(c, d, a, b, x[i+ ], ,  );

    b = md5_ff(b, c, d, a, x[i+ ], , -);

    a = md5_ff(a, b, c, d, x[i+ ],  , -);

    d = md5_ff(d, a, b, c, x[i+ ], ,  );

    c = md5_ff(c, d, a, b, x[i+ ], , -);

    b = md5_ff(b, c, d, a, x[i+ ], , -);

    a = md5_ff(a, b, c, d, x[i+ ],  ,  );

    d = md5_ff(d, a, b, c, x[i+ ], , -);

    c = md5_ff(c, d, a, b, x[i+], , -);

    b = md5_ff(b, c, d, a, x[i+], , -);

    a = md5_ff(a, b, c, d, x[i+],  ,  );

    d = md5_ff(d, a, b, c, x[i+], , -);

    c = md5_ff(c, d, a, b, x[i+], , -);

    b = md5_ff(b, c, d, a, x[i+], ,  );

    a = md5_gg(a, b, c, d, x[i+ ],  , -);

    d = md5_gg(d, a, b, c, x[i+ ],  , -);

    c = md5_gg(c, d, a, b, x[i+], ,  );

    b = md5_gg(b, c, d, a, x[i+ ], , -);

    a = md5_gg(a, b, c, d, x[i+ ],  , -);

    d = md5_gg(d, a, b, c, x[i+],  ,  );

    c = md5_gg(c, d, a, b, x[i+], , -);

    b = md5_gg(b, c, d, a, x[i+ ], , -);

    a = md5_gg(a, b, c, d, x[i+ ],  ,  );

    d = md5_gg(d, a, b, c, x[i+],  , -);

    c = md5_gg(c, d, a, b, x[i+ ], , -);

    b = md5_gg(b, c, d, a, x[i+ ], ,  );

    a = md5_gg(a, b, c, d, x[i+],  , -);

    d = md5_gg(d, a, b, c, x[i+ ],  , -);

    c = md5_gg(c, d, a, b, x[i+ ], ,  );

    b = md5_gg(b, c, d, a, x[i+], , -);

    a = md5_hh(a, b, c, d, x[i+ ],  , -);

    d = md5_hh(d, a, b, c, x[i+ ], , -);

    c = md5_hh(c, d, a, b, x[i+], ,  );

    b = md5_hh(b, c, d, a, x[i+], , -);

    a = md5_hh(a, b, c, d, x[i+ ],  , -);

    d = md5_hh(d, a, b, c, x[i+ ], ,  );

    c = md5_hh(c, d, a, b, x[i+ ], , -);

    b = md5_hh(b, c, d, a, x[i+], , -);

    a = md5_hh(a, b, c, d, x[i+],  ,  );

    d = md5_hh(d, a, b, c, x[i+ ], , -);

    c = md5_hh(c, d, a, b, x[i+ ], , -);

    b = md5_hh(b, c, d, a, x[i+ ], ,  );

    a = md5_hh(a, b, c, d, x[i+ ],  , -);

    d = md5_hh(d, a, b, c, x[i+], , -);

    c = md5_hh(c, d, a, b, x[i+], ,  );

    b = md5_hh(b, c, d, a, x[i+ ], , -);

    a = md5_ii(a, b, c, d, x[i+ ],  , -);

    d = md5_ii(d, a, b, c, x[i+ ], ,  );

    c = md5_ii(c, d, a, b, x[i+], , -);

    b = md5_ii(b, c, d, a, x[i+ ], , -);

    a = md5_ii(a, b, c, d, x[i+],  ,  );

    d = md5_ii(d, a, b, c, x[i+ ], , -);

    c = md5_ii(c, d, a, b, x[i+], , -);

    b = md5_ii(b, c, d, a, x[i+ ], , -);

    a = md5_ii(a, b, c, d, x[i+ ],  ,  );

    d = md5_ii(d, a, b, c, x[i+], , -);

    c = md5_ii(c, d, a, b, x[i+ ], , -);

    b = md5_ii(b, c, d, a, x[i+], ,  );

    a = md5_ii(a, b, c, d, x[i+ ],  , -);

    d = md5_ii(d, a, b, c, x[i+], , -);

    c = md5_ii(c, d, a, b, x[i+ ], ,  );

    b = md5_ii(b, c, d, a, x[i+ ], , -);

    a = safe_add(a, olda);

    b = safe_add(b, oldb);

    c = safe_add(c, oldc);

    d = safe_add(d, oldd);

  }

  return Array(a, b, c, d);

}

/*

 * These functions implement the four basic operations the algorithm uses.

 */

function md5_cmn(q, a, b, x, s, t)

{

  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);

}

function md5_ff(a, b, c, d, x, s, t)

{

  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);

}

function md5_gg(a, b, c, d, x, s, t)

{

  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);

}

function md5_hh(a, b, c, d, x, s, t)

{

  return md5_cmn(b ^ c ^ d, a, b, x, s, t);

}

function md5_ii(a, b, c, d, x, s, t)

{

  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);

}

/*

 * Calculate the HMAC-MD5, of a key and some data

 */

function core_hmac_md5(key, data)

{

  var bkey = str2binl(key);

  if(bkey.length > ) bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(), opad = Array();

  for(var i = ; i < ; i++)

  {

    ipad[i] = bkey[i] ^ 0x36363636;

    opad[i] = bkey[i] ^ 0x5C5C5C5C;

  }

  var hash = core_md5(ipad.concat(str2binl(data)),  + data.length * chrsz);

  return core_md5(opad.concat(hash),  + );

}

/*

 * Add integers, wrapping at 2^32. This uses 16-bit operations internally

 * to work around bugs in some JS interpreters.

 */

function safe_add(x, y)

{

  var lsw = (x & 0xFFFF) + (y & 0xFFFF);

  var msw = (x >> ) + (y >> ) + (lsw >> );

  return (msw << ) | (lsw & 0xFFFF);

}

/*

 * Bitwise rotate a 32-bit number to the left.

 */

function bit_rol(num, cnt)

{

  return (num << cnt) | (num >>> ( - cnt));

}

/*

 * Convert a string to an array of little-endian words

 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.

 */

function str2binl(str)

{

  var bin = Array();

  var mask = ( << chrsz) - ;

  for(var i = ; i < str.length * chrsz; i += chrsz)

    bin[i>>] |= (str.charCodeAt(i / chrsz) & mask) << (i%);

  return bin;

}

/*

 * Convert an array of little-endian words to a string

 */

function binl2str(bin)

{

  var str = "";

  var mask = ( << chrsz) - ;

  for(var i = ; i < bin.length * ; i += chrsz)

    str += String.fromCharCode((bin[i>>] >>> (i % )) & mask);

  return str;

}

/*

 * Convert an array of little-endian words to a hex string.

 */

function binl2hex(binarray)

{

  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";

  var str = "";

  for(var i = ; i < binarray.length * ; i++)

  {

    str += hex_tab.charAt((binarray[i>>] >> ((i%)*+)) & 0xF) +

           hex_tab.charAt((binarray[i>>] >> ((i%)*  )) & 0xF);

  }

  return str;

}

/*

 * Convert an array of little-endian words to a base-64 string

 */

function binl2b64(binarray)

{

  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

  var str = "";

  for(var i = ; i < binarray.length * ; i += )

  {

    var triplet = (((binarray[i   >> ] >>  * ( i   %)) & 0xFF) << )

                | (((binarray[i+ >> ] >>  * ((i+)%)) & 0xFF) <<  )

                |  ((binarray[i+ >> ] >>  * ((i+)%)) & 0xFF);

    for(var j = ; j < ; j++)

    {

      if(i *  + j *  > binarray.length * ) str += b64pad;

      else str += tab.charAt((triplet >> *(-j)) & 0x3F);

    }

  }

  return str;

}

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