### [小程序如何使用md5](https://www.prosaas.cn/article/16793)

**Published:** 2020-03-26T02:55:46

**Author:** 5201314

**Excerpt:** 小程序如何使用md5 1、下载MD5源文件(JS);2、在小程序模块中使用require引入外部模块；也可以在…

![](https://img.php.cn/upload/article/000/000/040/5e7c189ce9d0e515.jpg)

**小程序如何使用md5**    

1、下载MD5源文件(JS);

2、在小程序模块中使用require引入外部模块；也可以在app.js中直接全局引入md5.js文件。

因为源md5.js中没有对模块进行输出，如果使用require需要export，所以在md5.js中需要加入以下代码：

module.exports =  {
  hexMD5: hex\_md5, //需要输出的加密算法，我这边只写了我需要得两种
  b64Md5: b64\_md5,
}

在js文件中使用require引入md5:

推荐学习：小程序开发

const md5 = require('../../assets/js/md5/md5.js');

使用：

let b64 = md5.b64Md5(code); //code需要加密的数据

下面是我的文件结构：

![](https://img.php.cn/upload/image/971/736/554/1585191026826198.png)

/\*
 \* 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.
 \*/

/\*
 \* Configurable variables. You may need to tweak these to be compatible with
 \* the server-side, but the defaults work in most cases.
 \*/
var hexcase = 0;  /\* hex output format. 0 - lowercase; 1 - uppercase        \*/
var b64pad  = ""; /\* base-64 pad character. "=" for strict RFC compliance   \*/
var chrsz   = 8;  /\* 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\[len >> 5\] |= 0x80 << ((len) % 32);
  x\[(((len + 64) >>> 9) << 4) + 14\] = len;

  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5\_ff(a, b, c, d, x\[i+ 0\], 7 , -680876936);
    d = md5\_ff(d, a, b, c, x\[i+ 1\], 12, -389564586);
    c = md5\_ff(c, d, a, b, x\[i+ 2\], 17,  606105819);
    b = md5\_ff(b, c, d, a, x\[i+ 3\], 22, -1044525330);
    a = md5\_ff(a, b, c, d, x\[i+ 4\], 7 , -176418897);
    d = md5\_ff(d, a, b, c, x\[i+ 5\], 12,  1200080426);
    c = md5\_ff(c, d, a, b, x\[i+ 6\], 17, -1473231341);
    b = md5\_ff(b, c, d, a, x\[i+ 7\], 22, -45705983);
    a = md5\_ff(a, b, c, d, x\[i+ 8\], 7 ,  1770035416);
    d = md5\_ff(d, a, b, c, x\[i+ 9\], 12, -1958414417);
    c = md5\_ff(c, d, a, b, x\[i+10\], 17, -42063);
    b = md5\_ff(b, c, d, a, x\[i+11\], 22, -1990404162);
    a = md5\_ff(a, b, c, d, x\[i+12\], 7 ,  1804603682);
    d = md5\_ff(d, a, b, c, x\[i+13\], 12, -40341101);
    c = md5\_ff(c, d, a, b, x\[i+14\], 17, -1502002290);
    b = md5\_ff(b, c, d, a, x\[i+15\], 22,  1236535329);

    a = md5\_gg(a, b, c, d, x\[i+ 1\], 5 , -165796510);
    d = md5\_gg(d, a, b, c, x\[i+ 6\], 9 , -1069501632);
    c = md5\_gg(c, d, a, b, x\[i+11\], 14,  643717713);
    b = md5\_gg(b, c, d, a, x\[i+ 0\], 20, -373897302);
    a = md5\_gg(a, b, c, d, x\[i+ 5\], 5 , -701558691);
    d = md5\_gg(d, a, b, c, x\[i+10\], 9 ,  38016083);
    c = md5\_gg(c, d, a, b, x\[i+15\], 14, -660478335);
    b = md5\_gg(b, c, d, a, x\[i+ 4\], 20, -405537848);
    a = md5\_gg(a, b, c, d, x\[i+ 9\], 5 ,  568446438);
    d = md5\_gg(d, a, b, c, x\[i+14\], 9 , -1019803690);
    c = md5\_gg(c, d, a, b, x\[i+ 3\], 14, -187363961);
    b = md5\_gg(b, c, d, a, x\[i+ 8\], 20,  1163531501);
    a = md5\_gg(a, b, c, d, x\[i+13\], 5 , -1444681467);
    d = md5\_gg(d, a, b, c, x\[i+ 2\], 9 , -51403784);
    c = md5\_gg(c, d, a, b, x\[i+ 7\], 14,  1735328473);
    b = md5\_gg(b, c, d, a, x\[i+12\], 20, -1926607734);

    a = md5\_hh(a, b, c, d, x\[i+ 5\], 4 , -378558);
    d = md5\_hh(d, a, b, c, x\[i+ 8\], 11, -2022574463);
    c = md5\_hh(c, d, a, b, x\[i+11\], 16,  1839030562);
    b = md5\_hh(b, c, d, a, x\[i+14\], 23, -35309556);
    a = md5\_hh(a, b, c, d, x\[i+ 1\], 4 , -1530992060);
    d = md5\_hh(d, a, b, c, x\[i+ 4\], 11,  1272893353);
    c = md5\_hh(c, d, a, b, x\[i+ 7\], 16, -155497632);
    b = md5\_hh(b, c, d, a, x\[i+10\], 23, -1094730640);
    a = md5\_hh(a, b, c, d, x\[i+13\], 4 ,  681279174);
    d = md5\_hh(d, a, b, c, x\[i+ 0\], 11, -358537222);
    c = md5\_hh(c, d, a, b, x\[i+ 3\], 16, -722521979);
    b = md5\_hh(b, c, d, a, x\[i+ 6\], 23,  76029189);
    a = md5\_hh(a, b, c, d, x\[i+ 9\], 4 , -640364487);
    d = md5\_hh(d, a, b, c, x\[i+12\], 11, -421815835);
    c = md5\_hh(c, d, a, b, x\[i+15\], 16,  530742520);
    b = md5\_hh(b, c, d, a, x\[i+ 2\], 23, -995338651);

    a = md5\_ii(a, b, c, d, x\[i+ 0\], 6 , -198630844);
    d = md5\_ii(d, a, b, c, x\[i+ 7\], 10,  1126891415);
    c = md5\_ii(c, d, a, b, x\[i+14\], 15, -1416354905);
    b = md5\_ii(b, c, d, a, x\[i+ 5\], 21, -57434055);
    a = md5\_ii(a, b, c, d, x\[i+12\], 6 ,  1700485571);
    d = md5\_ii(d, a, b, c, x\[i+ 3\], 10, -1894986606);
    c = md5\_ii(c, d, a, b, x\[i+10\], 15, -1051523);
    b = md5\_ii(b, c, d, a, x\[i+ 1\], 21, -2054922799);
    a = md5\_ii(a, b, c, d, x\[i+ 8\], 6 ,  1873313359);
    d = md5\_ii(d, a, b, c, x\[i+15\], 10, -30611744);
    c = md5\_ii(c, d, a, b, x\[i+ 6\], 15, -1560198380);
    b = md5\_ii(b, c, d, a, x\[i+13\], 21,  1309151649);
    a = md5\_ii(a, b, c, d, x\[i+ 4\], 6 , -145523070);
    d = md5\_ii(d, a, b, c, x\[i+11\], 10, -1120210379);
    c = md5\_ii(c, d, a, b, x\[i+ 2\], 15,  718787259);
    b = md5\_ii(b, c, d, a, x\[i+ 9\], 21, -343485551);

    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 > 16) bkey = core\_md5(bkey, key.length \* chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad\[i\] = bkey\[i\] ^ 0x36363636;
    opad\[i\] = bkey\[i\] ^ 0x5C5C5C5C;
  }

  var hash = core\_md5(ipad.concat(str2binl(data)), 512 + data.length \* chrsz);
  return core\_md5(opad.concat(hash), 512 + 128);
}

/\*
 \* 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 >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

/\*
 \* Bitwise rotate a 32-bit number to the left.
 \*/
function bit\_rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - 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 = (1 << chrsz) - 1;
  for(var i = 0; i < str.length \* chrsz; i += chrsz)
    bin\[i>>5\] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
  return bin;
}

/\*
 \* Convert an array of little-endian words to a string
 \*/
function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length \* 32; i += chrsz)
    str += String.fromCharCode((bin\[i>>5\] >>> (i % 32)) & 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 = 0; i < binarray.length \* 4; i++)
  {
    str += hex\_tab.charAt((binarray\[i>>2\] >> ((i%4)\*8+4)) & 0xF) +
           hex\_tab.charAt((binarray\[i>>2\] >> ((i%4)\*8  )) & 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 = 0; i < binarray.length \* 4; i += 3)
  {
    var triplet = (((binarray\[i   >> 2\] >> 8 \* ( i   %4)) & 0xFF) << 16)
                | (((binarray\[i+1 >> 2\] >> 8 \* ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray\[i+2 >> 2\] >> 8 \* ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i \* 8 + j \* 6 > binarray.length \* 32) str += b64pad;
      else str += tab.charAt((triplet >> 6\*(3-j)) & 0x3F);
    }
  }
  return str;
}


module.exports =  {
  hexMD5: hex\_md5,
  b64Md5: b64\_md5,
}

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