小程序加密

公司项目小程序因有收货地址功能，需加密，研究记录一下。

简单介绍一下用到的两种加密

MD5 信息摘要算法（英语：MD5 Message-Digest Algorithm），MD5对于同样的字符串加密得到的结果是一致的(可以通过碰撞解密)，MD5的加密过程不可逆。

AES 密码学中的高级加密标准（Advanced Encryption Standard，AES），又称Rijndael加密法，对称加密,是美国联邦政府采用的一种区块加密标准。

说一下我加密的思路

前后台动态获取某两个约定的值作为MD5的秘钥，一个作为AES的秘钥，一个作为AES的偏移量，然后后台把要使用AES加密的数据加密，把加密的数据传到前端；前端获取约定的两个值，使用MD5加密，然后把加密出来的值传递给AES作为秘钥和偏移量解密，把解密到的值进行展示。

缺点：只能阻拦一些低端的抓包截取。

实现步骤

MD5和AES的源码在文章最后贴。因为是微信小程序，所以示例为微信小程序。微信小程序不支持使用已经发布的插件包，比如NPM，只能把源码放到项目里面使用。

在小程序根目录创建utils文件夹，里面存放源码。
把MD5和AES的js源文件放到文件目录里面。
注意需要在源文件最后 module.exports 出来，在你要使用的页面require引入。

引入

  const md51 = require('../../utils/md5_1.js');
  const aes = require('../../utils/aes.js');

使用

      /*
    md5 生成两个约定值作为AES的秘钥和偏移量
    使用AES进行两次加密
    */
    let code = md51.md5('jxq1444'); // md5 生成的code

    let v = md51.md5('cfsq1444'); // md5 生成的偏移量

    let key = aes.enc.Utf8.parse(code); // 秘钥

    let iv = aes.enc.Utf8.parse(v); // 偏移量

    let pwd = aes.encrypt('你好', key, iv)  // 单次加密

    let original = aes.encrypt(pwd, key, iv) // 二次加密
    console.log(original)
    let mm = aes.decrypt(original, key, iv); // 解密一次

    let word = aes.decrypt(mm, key, iv); // 解密二次

    console.log(word)  // 原文

源码

MD5

  function md5(string) {
 var x = Array();
 var k, AA, BB, CC, DD, a, b, c, d;
 var S11 = 7, S12 = 12, S13 = 17, S14 = 22;
 var S21 = 5, S22 = 9, S23 = 14, S24 = 20;
 var S31 = 4, S32 = 11, S33 = 16, S34 = 23;
 var S41 = 6, S42 = 10, S43 = 15, S44 = 21;
 string = Utf8Encode(string);
 x = ConvertToWordArray(string);
 a = 0x67452301;
 b = 0xEFCDAB89;
 c = 0x98BADCFE;
 d = 0x10325476;
 for (k = 0; k < x.length; k += 16) {
   AA = a;
   BB = b;
   CC = c;
   DD = d;
   a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
   d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
   c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
   b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
   a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
   d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
   c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
   b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
   a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
   d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
   c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
   b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
   a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
   d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
   c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
   b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
   a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
   d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
   c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
   b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
   a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
   d = GG(d, a, b, c, x[k + 10], S22, 0x2441453);
   c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
   b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
   a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
   d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
   c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
   b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
   a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
   d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
   c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
   b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
   a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
   d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
   c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
   b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
   a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
   d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
   c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
   b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
   a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
   d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
   c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
   b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
   a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
   d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
   c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
   b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
   a = II(a, b, c, d, x[k + 0], S41, 0xF4292244);
   d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
   c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
   b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
   a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
   d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
   c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
   b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
   a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
   d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
   c = II(c, d, a, b, x[k + 6], S43, 0xA3014314);
   b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
   a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
   d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
   c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
   b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
   a = AddUnsigned(a, AA);
   b = AddUnsigned(b, BB);
   c = AddUnsigned(c, CC);
   d = AddUnsigned(d, DD);
 }
 var temp = WordToHex(a) + WordToHex(b) + WordToHex(c) + WordToHex(d);
 return temp.toUpperCase();
  }
  function RotateLeft(lValue, iShiftBits) {
 return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
  }
  function AddUnsigned(lX, lY) {
 var lX4, lY4, lX8, lY8, lResult;
 lX8 = (lX & 0x80000000);
 lY8 = (lY & 0x80000000);
 lX4 = (lX & 0x40000000);
 lY4 = (lY & 0x40000000);
 lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
 if (lX4 & lY4) {
   return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
 }
 if (lX4 | lY4) {
   if (lResult & 0x40000000) {
     return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
   } else {
     return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
   }
 } else {
   return (lResult ^ lX8 ^ lY8);
 }
  }
  function F(x, y, z) {
 return (x & y) | ((~x) & z);
  }
  function G(x, y, z) {
 return (x & z) | (y & (~z));
  }
  function H(x, y, z) {
 return (x ^ y ^ z);
  }
  function I(x, y, z) {
 return (y ^ (x | (~z)));
  }
  function FF(a, b, c, d, x, s, ac) {
 a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
 return AddUnsigned(RotateLeft(a, s), b);
  }
  function GG(a, b, c, d, x, s, ac) {
 a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
 return AddUnsigned(RotateLeft(a, s), b);
  }
  function HH(a, b, c, d, x, s, ac) {
 a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
 return AddUnsigned(RotateLeft(a, s), b);
  }
  function II(a, b, c, d, x, s, ac) {
 a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
 return AddUnsigned(RotateLeft(a, s), b);
  }
  function ConvertToWordArray(string) {
 var lWordCount;
 var lMessageLength = string.length;
 var lNumberOfWords_temp1 = lMessageLength + 8;
 var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
 var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
 var lWordArray = Array(lNumberOfWords - 1);
 var lBytePosition = 0;
 var lByteCount = 0;
 while (lByteCount < lMessageLength) {
   lWordCount = (lByteCount - (lByteCount % 4)) / 4;
   lBytePosition = (lByteCount % 4) * 8;
   lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
   lByteCount++;
 }
 lWordCount = (lByteCount - (lByteCount % 4)) / 4;
 lBytePosition = (lByteCount % 4) * 8;
 lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
 lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
 lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
 return lWordArray;
  }
  function WordToHex(lValue) {
 var WordToHexValue = "", WordToHexValue_temp = "", lByte, lCount;
 for (lCount = 0; lCount <= 3; lCount++) {
   lByte = (lValue >>> (lCount * 8)) & 255;
   WordToHexValue_temp = "0" + lByte.toString(16);
   WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2);
 }
 return WordToHexValue;
  }
  function Utf8Encode(string) {
 var utftext = "";
 for (var n = 0; n < string.length; n++) {
   var c = string.charCodeAt(n);
   if (c < 128) {
     utftext += String.fromCharCode(c);
   } else if ((c > 127) && (c < 2048)) {
     utftext += String.fromCharCode((c >> 6) | 192);
     utftext += String.fromCharCode((c & 63) | 128);
   } else {
     utftext += String.fromCharCode((c >> 12) | 224);
     utftext += String.fromCharCode(((c >> 6) & 63) | 128);
     utftext += String.fromCharCode((c & 63) | 128);
   }
 }
 return utftext;
  }
  module.exports = {
 md5: md5
  }

AES

    /*
  CryptoJS v3.1.2
  code.google.com/p/crypto-js
  (c) 2009-2013 by Jeff Mott. All rights reserved.
  code.google.com/p/crypto-js/wiki/License
  */
  var CryptoJS = CryptoJS || function (u, p) {
    var d = {}, l = d.lib = {}, s = function () { }, t = l.Base = { extend: function (a) { s.prototype = this; var c = new s; a && c.mixIn(a); c.hasOwnProperty("init") || (c.init = function () { c.$super.init.apply(this, arguments) }); c.init.prototype = c; c.$super = this; return c }, create: function () { var a = this.extend(); a.init.apply(a, arguments); return a }, init: function () { }, mixIn: function (a) { for (var c in a) a.hasOwnProperty(c) && (this[c] = a[c]); a.hasOwnProperty("toString") && (this.toString = a.toString) }, clone: function () { return this.init.prototype.extend(this) } },
      r = l.WordArray = t.extend({
        init: function (a, c) { a = this.words = a || []; this.sigBytes = c != p ? c : 4 * a.length }, toString: function (a) { return (a || v).stringify(this) }, concat: function (a) { var c = this.words, e = a.words, j = this.sigBytes; a = a.sigBytes; this.clamp(); if (j % 4) for (var k = 0; k < a; k++)c[j + k >>> 2] |= (e[k >>> 2] >>> 24 - 8 * (k % 4) & 255) << 24 - 8 * ((j + k) % 4); else if (65535 < e.length) for (k = 0; k < a; k += 4)c[j + k >>> 2] = e[k >>> 2]; else c.push.apply(c, e); this.sigBytes += a; return this }, clamp: function () {
          var a = this.words, c = this.sigBytes; a[c >>> 2] &= 4294967295 <<
            32 - 8 * (c % 4); a.length = u.ceil(c / 4)
        }, clone: function () { var a = t.clone.call(this); a.words = this.words.slice(0); return a }, random: function (a) { for (var c = [], e = 0; e < a; e += 4)c.push(4294967296 * u.random() | 0); return new r.init(c, a) }
      }), w = d.enc = {}, v = w.Hex = {
        stringify: function (a) { var c = a.words; a = a.sigBytes; for (var e = [], j = 0; j < a; j++) { var k = c[j >>> 2] >>> 24 - 8 * (j % 4) & 255; e.push((k >>> 4).toString(16)); e.push((k & 15).toString(16)) } return e.join("") }, parse: function (a) {
          for (var c = a.length, e = [], j = 0; j < c; j += 2)e[j >>> 3] |= parseInt(a.substr(j,
            2), 16) << 24 - 4 * (j % 8); return new r.init(e, c / 2)
        }
      }, b = w.Latin1 = { stringify: function (a) { var c = a.words; a = a.sigBytes; for (var e = [], j = 0; j < a; j++)e.push(String.fromCharCode(c[j >>> 2] >>> 24 - 8 * (j % 4) & 255)); return e.join("") }, parse: function (a) { for (var c = a.length, e = [], j = 0; j < c; j++)e[j >>> 2] |= (a.charCodeAt(j) & 255) << 24 - 8 * (j % 4); return new r.init(e, c) } }, x = w.Utf8 = { stringify: function (a) { try { return decodeURIComponent(escape(b.stringify(a))) } catch (c) { throw Error("Malformed UTF-8 data"); } }, parse: function (a) { return b.parse(unescape(encodeURIComponent(a))) } },
      q = l.BufferedBlockAlgorithm = t.extend({
        reset: function () { this._data = new r.init; this._nDataBytes = 0 }, _append: function (a) { "string" == typeof a && (a = x.parse(a)); this._data.concat(a); this._nDataBytes += a.sigBytes }, _process: function (a) { var c = this._data, e = c.words, j = c.sigBytes, k = this.blockSize, b = j / (4 * k), b = a ? u.ceil(b) : u.max((b | 0) - this._minBufferSize, 0); a = b * k; j = u.min(4 * a, j); if (a) { for (var q = 0; q < a; q += k)this._doProcessBlock(e, q); q = e.splice(0, a); c.sigBytes -= j } return new r.init(q, j) }, clone: function () {
          var a = t.clone.call(this);
          a._data = this._data.clone(); return a
        }, _minBufferSize: 0
      }); l.Hasher = q.extend({
        cfg: t.extend(), init: function (a) { this.cfg = this.cfg.extend(a); this.reset() }, reset: function () { q.reset.call(this); this._doReset() }, update: function (a) { this._append(a); this._process(); return this }, finalize: function (a) { a && this._append(a); return this._doFinalize() }, blockSize: 16, _createHelper: function (a) { return function (b, e) { return (new a.init(e)).finalize(b) } }, _createHmacHelper: function (a) {
          return function (b, e) {
            return (new n.HMAC.init(a,
              e)).finalize(b)
          }
        }
      }); var n = d.algo = {}; return d
  }(Math);
  (function () {
    var u = CryptoJS, p = u.lib.WordArray; u.enc.Base64 = {
      stringify: function (d) { var l = d.words, p = d.sigBytes, t = this._map; d.clamp(); d = []; for (var r = 0; r < p; r += 3)for (var w = (l[r >>> 2] >>> 24 - 8 * (r % 4) & 255) << 16 | (l[r + 1 >>> 2] >>> 24 - 8 * ((r + 1) % 4) & 255) << 8 | l[r + 2 >>> 2] >>> 24 - 8 * ((r + 2) % 4) & 255, v = 0; 4 > v && r + 0.75 * v < p; v++)d.push(t.charAt(w >>> 6 * (3 - v) & 63)); if (l = t.charAt(64)) for (; d.length % 4;)d.push(l); return d.join("") }, parse: function (d) {
        var l = d.length, s = this._map, t = s.charAt(64); t && (t = d.indexOf(t), -1 != t && (l = t)); for (var t = [], r = 0, w = 0; w <
          l; w++)if (w % 4) { var v = s.indexOf(d.charAt(w - 1)) << 2 * (w % 4), b = s.indexOf(d.charAt(w)) >>> 6 - 2 * (w % 4); t[r >>> 2] |= (v | b) << 24 - 8 * (r % 4); r++ } return p.create(t, r)
      }, _map: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
    }
  })();
  (function (u) {
    function p(b, n, a, c, e, j, k) { b = b + (n & a | ~n & c) + e + k; return (b << j | b >>> 32 - j) + n } function d(b, n, a, c, e, j, k) { b = b + (n & c | a & ~c) + e + k; return (b << j | b >>> 32 - j) + n } function l(b, n, a, c, e, j, k) { b = b + (n ^ a ^ c) + e + k; return (b << j | b >>> 32 - j) + n } function s(b, n, a, c, e, j, k) { b = b + (a ^ (n | ~c)) + e + k; return (b << j | b >>> 32 - j) + n } for (var t = CryptoJS, r = t.lib, w = r.WordArray, v = r.Hasher, r = t.algo, b = [], x = 0; 64 > x; x++)b[x] = 4294967296 * u.abs(u.sin(x + 1)) | 0; r = r.MD5 = v.extend({
      _doReset: function () { this._hash = new w.init([1732584193, 4023233417, 2562383102, 271733878]) },
      _doProcessBlock: function (q, n) {
        for (var a = 0; 16 > a; a++) { var c = n + a, e = q[c]; q[c] = (e << 8 | e >>> 24) & 16711935 | (e << 24 | e >>> 8) & 4278255360 } var a = this._hash.words, c = q[n + 0], e = q[n + 1], j = q[n + 2], k = q[n + 3], z = q[n + 4], r = q[n + 5], t = q[n + 6], w = q[n + 7], v = q[n + 8], A = q[n + 9], B = q[n + 10], C = q[n + 11], u = q[n + 12], D = q[n + 13], E = q[n + 14], x = q[n + 15], f = a[0], m = a[1], g = a[2], h = a[3], f = p(f, m, g, h, c, 7, b[0]), h = p(h, f, m, g, e, 12, b[1]), g = p(g, h, f, m, j, 17, b[2]), m = p(m, g, h, f, k, 22, b[3]), f = p(f, m, g, h, z, 7, b[4]), h = p(h, f, m, g, r, 12, b[5]), g = p(g, h, f, m, t, 17, b[6]), m = p(m, g, h, f, w, 22, b[7]),
          f = p(f, m, g, h, v, 7, b[8]), h = p(h, f, m, g, A, 12, b[9]), g = p(g, h, f, m, B, 17, b[10]), m = p(m, g, h, f, C, 22, b[11]), f = p(f, m, g, h, u, 7, b[12]), h = p(h, f, m, g, D, 12, b[13]), g = p(g, h, f, m, E, 17, b[14]), m = p(m, g, h, f, x, 22, b[15]), f = d(f, m, g, h, e, 5, b[16]), h = d(h, f, m, g, t, 9, b[17]), g = d(g, h, f, m, C, 14, b[18]), m = d(m, g, h, f, c, 20, b[19]), f = d(f, m, g, h, r, 5, b[20]), h = d(h, f, m, g, B, 9, b[21]), g = d(g, h, f, m, x, 14, b[22]), m = d(m, g, h, f, z, 20, b[23]), f = d(f, m, g, h, A, 5, b[24]), h = d(h, f, m, g, E, 9, b[25]), g = d(g, h, f, m, k, 14, b[26]), m = d(m, g, h, f, v, 20, b[27]), f = d(f, m, g, h, D, 5, b[28]), h = d(h, f,
            m, g, j, 9, b[29]), g = d(g, h, f, m, w, 14, b[30]), m = d(m, g, h, f, u, 20, b[31]), f = l(f, m, g, h, r, 4, b[32]), h = l(h, f, m, g, v, 11, b[33]), g = l(g, h, f, m, C, 16, b[34]), m = l(m, g, h, f, E, 23, b[35]), f = l(f, m, g, h, e, 4, b[36]), h = l(h, f, m, g, z, 11, b[37]), g = l(g, h, f, m, w, 16, b[38]), m = l(m, g, h, f, B, 23, b[39]), f = l(f, m, g, h, D, 4, b[40]), h = l(h, f, m, g, c, 11, b[41]), g = l(g, h, f, m, k, 16, b[42]), m = l(m, g, h, f, t, 23, b[43]), f = l(f, m, g, h, A, 4, b[44]), h = l(h, f, m, g, u, 11, b[45]), g = l(g, h, f, m, x, 16, b[46]), m = l(m, g, h, f, j, 23, b[47]), f = s(f, m, g, h, c, 6, b[48]), h = s(h, f, m, g, w, 10, b[49]), g = s(g, h, f, m,
              E, 15, b[50]), m = s(m, g, h, f, r, 21, b[51]), f = s(f, m, g, h, u, 6, b[52]), h = s(h, f, m, g, k, 10, b[53]), g = s(g, h, f, m, B, 15, b[54]), m = s(m, g, h, f, e, 21, b[55]), f = s(f, m, g, h, v, 6, b[56]), h = s(h, f, m, g, x, 10, b[57]), g = s(g, h, f, m, t, 15, b[58]), m = s(m, g, h, f, D, 21, b[59]), f = s(f, m, g, h, z, 6, b[60]), h = s(h, f, m, g, C, 10, b[61]), g = s(g, h, f, m, j, 15, b[62]), m = s(m, g, h, f, A, 21, b[63]); a[0] = a[0] + f | 0; a[1] = a[1] + m | 0; a[2] = a[2] + g | 0; a[3] = a[3] + h | 0
      }, _doFinalize: function () {
        var b = this._data, n = b.words, a = 8 * this._nDataBytes, c = 8 * b.sigBytes; n[c >>> 5] |= 128 << 24 - c % 32; var e = u.floor(a /
          4294967296); n[(c + 64 >>> 9 << 4) + 15] = (e << 8 | e >>> 24) & 16711935 | (e << 24 | e >>> 8) & 4278255360; n[(c + 64 >>> 9 << 4) + 14] = (a << 8 | a >>> 24) & 16711935 | (a << 24 | a >>> 8) & 4278255360; b.sigBytes = 4 * (n.length + 1); this._process(); b = this._hash; n = b.words; for (a = 0; 4 > a; a++)c = n[a], n[a] = (c << 8 | c >>> 24) & 16711935 | (c << 24 | c >>> 8) & 4278255360; return b
      }, clone: function () { var b = v.clone.call(this); b._hash = this._hash.clone(); return b }
    }); t.MD5 = v._createHelper(r); t.HmacMD5 = v._createHmacHelper(r)
  })(Math);
  (function () {
    var u = CryptoJS, p = u.lib, d = p.Base, l = p.WordArray, p = u.algo, s = p.EvpKDF = d.extend({ cfg: d.extend({ keySize: 4, hasher: p.MD5, iterations: 1 }), init: function (d) { this.cfg = this.cfg.extend(d) }, compute: function (d, r) { for (var p = this.cfg, s = p.hasher.create(), b = l.create(), u = b.words, q = p.keySize, p = p.iterations; u.length < q;) { n && s.update(n); var n = s.update(d).finalize(r); s.reset(); for (var a = 1; a < p; a++)n = s.finalize(n), s.reset(); b.concat(n) } b.sigBytes = 4 * q; return b } }); u.EvpKDF = function (d, l, p) {
      return s.create(p).compute(d,
        l)
    }
  })();
  CryptoJS.lib.Cipher || function (u) {
    var p = CryptoJS, d = p.lib, l = d.Base, s = d.WordArray, t = d.BufferedBlockAlgorithm, r = p.enc.Base64, w = p.algo.EvpKDF, v = d.Cipher = t.extend({
      cfg: l.extend(), createEncryptor: function (e, a) { return this.create(this._ENC_XFORM_MODE, e, a) }, createDecryptor: function (e, a) { return this.create(this._DEC_XFORM_MODE, e, a) }, init: function (e, a, b) { this.cfg = this.cfg.extend(b); this._xformMode = e; this._key = a; this.reset() }, reset: function () { t.reset.call(this); this._doReset() }, process: function (e) { this._append(e); return this._process() },
      finalize: function (e) { e && this._append(e); return this._doFinalize() }, keySize: 4, ivSize: 4, _ENC_XFORM_MODE: 1, _DEC_XFORM_MODE: 2, _createHelper: function (e) { return { encrypt: function (b, k, d) { return ("string" == typeof k ? c : a).encrypt(e, b, k, d) }, decrypt: function (b, k, d) { return ("string" == typeof k ? c : a).decrypt(e, b, k, d) } } }
    }); d.StreamCipher = v.extend({ _doFinalize: function () { return this._process(!0) }, blockSize: 1 }); var b = p.mode = {}, x = function (e, a, b) {
      var c = this._iv; c ? this._iv = u : c = this._prevBlock; for (var d = 0; d < b; d++)e[a + d] ^=
        c[d]
    }, q = (d.BlockCipherMode = l.extend({ createEncryptor: function (e, a) { return this.Encryptor.create(e, a) }, createDecryptor: function (e, a) { return this.Decryptor.create(e, a) }, init: function (e, a) { this._cipher = e; this._iv = a } })).extend(); q.Encryptor = q.extend({ processBlock: function (e, a) { var b = this._cipher, c = b.blockSize; x.call(this, e, a, c); b.encryptBlock(e, a); this._prevBlock = e.slice(a, a + c) } }); q.Decryptor = q.extend({
      processBlock: function (e, a) {
        var b = this._cipher, c = b.blockSize, d = e.slice(a, a + c); b.decryptBlock(e, a); x.call(this,
          e, a, c); this._prevBlock = d
      }
    }); b = b.CBC = q; q = (p.pad = {}).Pkcs7 = { pad: function (a, b) { for (var c = 4 * b, c = c - a.sigBytes % c, d = c << 24 | c << 16 | c << 8 | c, l = [], n = 0; n < c; n += 4)l.push(d); c = s.create(l, c); a.concat(c) }, unpad: function (a) { a.sigBytes -= a.words[a.sigBytes - 1 >>> 2] & 255 } }; d.BlockCipher = v.extend({
      cfg: v.cfg.extend({ mode: b, padding: q }), reset: function () {
        v.reset.call(this); var a = this.cfg, b = a.iv, a = a.mode; if (this._xformMode == this._ENC_XFORM_MODE) var c = a.createEncryptor; else c = a.createDecryptor, this._minBufferSize = 1; this._mode = c.call(a,
          this, b && b.words)
      }, _doProcessBlock: function (a, b) { this._mode.processBlock(a, b) }, _doFinalize: function () { var a = this.cfg.padding; if (this._xformMode == this._ENC_XFORM_MODE) { a.pad(this._data, this.blockSize); var b = this._process(!0) } else b = this._process(!0), a.unpad(b); return b }, blockSize: 4
    }); var n = d.CipherParams = l.extend({ init: function (a) { this.mixIn(a) }, toString: function (a) { return (a || this.formatter).stringify(this) } }), b = (p.format = {}).OpenSSL = {
      stringify: function (a) {
        var b = a.ciphertext; a = a.salt; return (a ? s.create([1398893684,
          1701076831]).concat(a).concat(b) : b).toString(r)
      }, parse: function (a) { a = r.parse(a); var b = a.words; if (1398893684 == b[0] && 1701076831 == b[1]) { var c = s.create(b.slice(2, 4)); b.splice(0, 4); a.sigBytes -= 16 } return n.create({ ciphertext: a, salt: c }) }
    }, a = d.SerializableCipher = l.extend({
      cfg: l.extend({ format: b }), encrypt: function (a, b, c, d) { d = this.cfg.extend(d); var l = a.createEncryptor(c, d); b = l.finalize(b); l = l.cfg; return n.create({ ciphertext: b, key: c, iv: l.iv, algorithm: a, mode: l.mode, padding: l.padding, blockSize: a.blockSize, formatter: d.format }) },
      decrypt: function (a, b, c, d) { d = this.cfg.extend(d); b = this._parse(b, d.format); return a.createDecryptor(c, d).finalize(b.ciphertext) }, _parse: function (a, b) { return "string" == typeof a ? b.parse(a, this) : a }
    }), p = (p.kdf = {}).OpenSSL = { execute: function (a, b, c, d) { d || (d = s.random(8)); a = w.create({ keySize: b + c }).compute(a, d); c = s.create(a.words.slice(b), 4 * c); a.sigBytes = 4 * b; return n.create({ key: a, iv: c, salt: d }) } }, c = d.PasswordBasedCipher = a.extend({
      cfg: a.cfg.extend({ kdf: p }), encrypt: function (b, c, d, l) {
        l = this.cfg.extend(l); d = l.kdf.execute(d,
          b.keySize, b.ivSize); l.iv = d.iv; b = a.encrypt.call(this, b, c, d.key, l); b.mixIn(d); return b
      }, decrypt: function (b, c, d, l) { l = this.cfg.extend(l); c = this._parse(c, l.format); d = l.kdf.execute(d, b.keySize, b.ivSize, c.salt); l.iv = d.iv; return a.decrypt.call(this, b, c, d.key, l) }
    })
  }();
  (function () {
    for (var u = CryptoJS, p = u.lib.BlockCipher, d = u.algo, l = [], s = [], t = [], r = [], w = [], v = [], b = [], x = [], q = [], n = [], a = [], c = 0; 256 > c; c++)a[c] = 128 > c ? c << 1 : c << 1 ^ 283; for (var e = 0, j = 0, c = 0; 256 > c; c++) { var k = j ^ j << 1 ^ j << 2 ^ j << 3 ^ j << 4, k = k >>> 8 ^ k & 255 ^ 99; l[e] = k; s[k] = e; var z = a[e], F = a[z], G = a[F], y = 257 * a[k] ^ 16843008 * k; t[e] = y << 24 | y >>> 8; r[e] = y << 16 | y >>> 16; w[e] = y << 8 | y >>> 24; v[e] = y; y = 16843009 * G ^ 65537 * F ^ 257 * z ^ 16843008 * e; b[k] = y << 24 | y >>> 8; x[k] = y << 16 | y >>> 16; q[k] = y << 8 | y >>> 24; n[k] = y; e ? (e = z ^ a[a[a[G ^ z]]], j ^= a[a[j]]) : e = j = 1 } var H = [0, 1, 2, 4, 8,
      16, 32, 64, 128, 27, 54], d = d.AES = p.extend({
        _doReset: function () {
          for (var a = this._key, c = a.words, d = a.sigBytes / 4, a = 4 * ((this._nRounds = d + 6) + 1), e = this._keySchedule = [], j = 0; j < a; j++)if (j < d) e[j] = c[j]; else { var k = e[j - 1]; j % d ? 6 < d && 4 == j % d && (k = l[k >>> 24] << 24 | l[k >>> 16 & 255] << 16 | l[k >>> 8 & 255] << 8 | l[k & 255]) : (k = k << 8 | k >>> 24, k = l[k >>> 24] << 24 | l[k >>> 16 & 255] << 16 | l[k >>> 8 & 255] << 8 | l[k & 255], k ^= H[j / d | 0] << 24); e[j] = e[j - d] ^ k } c = this._invKeySchedule = []; for (d = 0; d < a; d++)j = a - d, k = d % 4 ? e[j] : e[j - 4], c[d] = 4 > d || 4 >= j ? k : b[l[k >>> 24]] ^ x[l[k >>> 16 & 255]] ^ q[l[k >>>
            8 & 255]] ^ n[l[k & 255]]
        }, encryptBlock: function (a, b) { this._doCryptBlock(a, b, this._keySchedule, t, r, w, v, l) }, decryptBlock: function (a, c) { var d = a[c + 1]; a[c + 1] = a[c + 3]; a[c + 3] = d; this._doCryptBlock(a, c, this._invKeySchedule, b, x, q, n, s); d = a[c + 1]; a[c + 1] = a[c + 3]; a[c + 3] = d }, _doCryptBlock: function (a, b, c, d, e, j, l, f) {
          for (var m = this._nRounds, g = a[b] ^ c[0], h = a[b + 1] ^ c[1], k = a[b + 2] ^ c[2], n = a[b + 3] ^ c[3], p = 4, r = 1; r < m; r++)var q = d[g >>> 24] ^ e[h >>> 16 & 255] ^ j[k >>> 8 & 255] ^ l[n & 255] ^ c[p++], s = d[h >>> 24] ^ e[k >>> 16 & 255] ^ j[n >>> 8 & 255] ^ l[g & 255] ^ c[p++], t =
            d[k >>> 24] ^ e[n >>> 16 & 255] ^ j[g >>> 8 & 255] ^ l[h & 255] ^ c[p++], n = d[n >>> 24] ^ e[g >>> 16 & 255] ^ j[h >>> 8 & 255] ^ l[k & 255] ^ c[p++], g = q, h = s, k = t; q = (f[g >>> 24] << 24 | f[h >>> 16 & 255] << 16 | f[k >>> 8 & 255] << 8 | f[n & 255]) ^ c[p++]; s = (f[h >>> 24] << 24 | f[k >>> 16 & 255] << 16 | f[n >>> 8 & 255] << 8 | f[g & 255]) ^ c[p++]; t = (f[k >>> 24] << 24 | f[n >>> 16 & 255] << 16 | f[g >>> 8 & 255] << 8 | f[h & 255]) ^ c[p++]; n = (f[n >>> 24] << 24 | f[g >>> 16 & 255] << 16 | f[h >>> 8 & 255] << 8 | f[k & 255]) ^ c[p++]; a[b] = q; a[b + 1] = s; a[b + 2] = t; a[b + 3] = n
        }, keySize: 8
      }); u.AES = p._createHelper(d)
  })();


  CryptoJS.encrypt = function (word, key, iv) {
    return encrypt(word, key, iv)
  }

  CryptoJS.decrypt = function (word, key, iv) {
    return decrypt(word, key, iv)
  }

  /**
   * 加密
   * word：原密码
   * key ：key
   * iv  ： iv
   */
  function encrypt(word, key, iv) {
    var srcs = CryptoJS.enc.Utf8.parse(word);
    var encrypted = CryptoJS.AES.encrypt(srcs, key, { iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 });
    return encrypted.ciphertext.toString().toUpperCase();
  }

  /**
   * 解密
   * word：加密后的密码
   * key ：key
   * iv  ： iv
   */
  function decrypt(word, key, iv) {
    var encryptedHexStr = CryptoJS.enc.Hex.parse(word);
    var srcs = CryptoJS.enc.Base64.stringify(encryptedHexStr);
    var decrypt = CryptoJS.AES.decrypt(srcs, key, { iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 });
    var decryptedStr = decrypt.toString(CryptoJS.enc.Utf8);
    return decryptedStr.toString();
  }

  /**
   * @example
   * var CryptoJS = require('./../../../util/aes.js')
   * var key = CryptoJS.enc.Utf8.parse("key");
   * var iv = CryptoJS.enc.Utf8.parse("iv");
   * var pwd = CryptoJS.encrypt(this.data.pwdVal, key, iv)
   * var original = CryptoJS.encrypt(pwd, key, iv)
   */
  module.exports = CryptoJS;

猫说

小程序加密

简单介绍一下用到的两种加密

说一下我加密的思路

实现步骤

源码

AES

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