Source: md4.js

  1. /**
  2.  * [js-md4]{@link https://github.com/emn178/js-md4}
  3.  *
  4.  * @namespace md4
  5.  * @version 0.3.2
  6.  * @author Yi-Cyuan Chen [emn178@gmail.com]
  7.  * @copyright Yi-Cyuan Chen 2015-2027
  8.  * @license MIT
  9.  */
  10. /*jslint bitwise: true */
  11. (function () {
  12.   'use strict';
  14.   var root = typeof window === 'object' ? window : {};
  15.   var NODE_JS = !root.JS_MD4_NO_NODE_JS && typeof process === 'object' && process.versions && process.versions.node;
  16.   if (NODE_JS) {
  17.     root = global;
  18.   }
  19.   var COMMON_JS = !root.JS_MD4_NO_COMMON_JS && typeof module === 'object' && module.exports;
  20.   var AMD = typeof define === 'function' && define.amd;
  21.   var ARRAY_BUFFER = !root.JS_MD4_NO_ARRAY_BUFFER && typeof ArrayBuffer !== 'undefined';
  22.   var HEX_CHARS = '0123456789abcdef'.split('');
  23.   var EXTRA = [128, 32768, 8388608, -2147483648];
  24.   var SHIFT = [0, 8, 16, 24];
  25.   var OUTPUT_TYPES = ['hex', 'array', 'digest', 'buffer', 'arrayBuffer'];
  27.   var blocks = [], buffer8;
  28.   if (ARRAY_BUFFER) {
  29.     var buffer = new ArrayBuffer(68);
  30.     buffer8 = new Uint8Array(buffer);
  31.     blocks = new Uint32Array(buffer);
  32.   }
  34.   /**
  35.    * @method hex
  36.    * @memberof md4
  37.    * @description Output hash as hex string
  38.    * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
  39.    * @returns {String} Hex string
  40.    * @example
  41.    * md4.hex('The quick brown fox jumps over the lazy dog');
  42.    * // equal to
  43.    * md4('The quick brown fox jumps over the lazy dog');
  44.    */
  45.   /**
  46.    * @method digest
  47.    * @memberof md4
  48.    * @description Output hash as bytes array
  49.    * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
  50.    * @returns {Array} Bytes array
  51.    * @example
  52.    * md4.digest('The quick brown fox jumps over the lazy dog');
  53.    */
  54.   /**
  55.    * @method array
  56.    * @memberof md4
  57.    * @description Output hash as bytes array
  58.    * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
  59.    * @returns {Array} Bytes array
  60.    * @example
  61.    * md4.array('The quick brown fox jumps over the lazy dog');
  62.    */
  63.   /**
  64.    * @method buffer
  65.    * @memberof md4
  66.    * @description Output hash as ArrayBuffer
  67.    * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
  68.    * @returns {ArrayBuffer} ArrayBuffer
  69.    * @example
  70.    * md4.buffer('The quick brown fox jumps over the lazy dog');
  71.    */
  72.   var createOutputMethod = function (outputType) {
  73.     return function(message) {
  74.       return new Md4(true).update(message)[outputType]();
  75.     }
  76.   };
  78.   /**
  79.    * @method create
  80.    * @memberof md4
  81.    * @description Create Md4 object
  82.    * @returns {Md4} MD4 object.
  83.    * @example
  84.    * var hash = md4.create();
  85.    */
  86.   /**
  87.    * @method update
  88.    * @memberof md4
  89.    * @description Create and update Md4 object
  90.    * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
  91.    * @returns {Md4} MD4 object.
  92.    * @example
  93.    * var hash = md4.update('The quick brown fox jumps over the lazy dog');
  94.    * // equal to
  95.    * var hash = md4.create();
  96.    * hash.update('The quick brown fox jumps over the lazy dog');
  97.    */
  98.   var createMethod = function () {
  99.     var method = createOutputMethod('hex');
  100.     if (NODE_JS) {
  101.       method = nodeWrap(method);
  102.     }
  103.     method.create = function () {
  104.       return new Md4();
  105.     };
  106.     method.update = function (message) {
  107.       return method.create().update(message);
  108.     };
  109.     for (var i = 0; i < OUTPUT_TYPES.length; ++i) {
  110.       var type = OUTPUT_TYPES[i];
  111.       method[type] = createOutputMethod(type);
  112.     }
  113.     return method;
  114.   };
  116.   var nodeWrap = function (method) {
  117.     var crypto = require('crypto');
  118.     var Buffer = require('buffer').Buffer;
  119.     var nodeMethod = function (message) {
  120.       if (typeof message === 'string') {
  121.         return crypto.createHash('md4').update(message, 'utf8').digest('hex');
  122.       } else if (ARRAY_BUFFER && message instanceof ArrayBuffer) {
  123.         message = new Uint8Array(message);
  124.       } else if (message.length === undefined) {
  125.         return method(message);
  126.       }
  127.       return crypto.createHash('md4').update(new Buffer(message)).digest('hex');
  128.     };
  129.     return nodeMethod;
  130.   };
  132.   /**
  133.    * Md4 class
  134.    * @class Md4
  135.    * @description This is internal class.
  136.    * @see {@link md4.create}
  137.    */
  138.   function Md4(sharedMemory) {
  139.     if (sharedMemory) {
  140.       blocks[0] = blocks[16] = blocks[1] = blocks[2] = blocks[3] =
  141.       blocks[4] = blocks[5] = blocks[6] = blocks[7] =
  142.       blocks[8] = blocks[9] = blocks[10] = blocks[11] =
  143.       blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
  144.       this.blocks = blocks;
  145.       this.buffer8 = buffer8;
  146.     } else {
  147.       if (ARRAY_BUFFER) {
  148.         var buffer = new ArrayBuffer(68);
  149.         this.buffer8 = new Uint8Array(buffer);
  150.         this.blocks = new Uint32Array(buffer);
  151.       } else {
  152.         this.blocks = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
  153.       }
  154.     }
  155.     this.h0 = this.h1 = this.h2 = this.h3 = this.start = this.bytes = 0;
  156.     this.finalized = this.hashed = false;
  157.     this.first = true;
  158.   }
  160.   /**
  161.    * @method update
  162.    * @memberof Md4
  163.    * @instance
  164.    * @description Update hash
  165.    * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
  166.    * @returns {Md4} MD4 object.
  167.    * @see {@link md4.update}
  168.    */
  169.   Md4.prototype.update = function (message) {
  170.     if (this.finalized) {
  171.       return;
  172.     }
  173.     var notString = typeof message !== 'string';
  174.     if (notString && ARRAY_BUFFER && message instanceof ArrayBuffer) {
  175.       message = new Uint8Array(message);
  176.     }
  177.     var code, index = 0, i, length = message.length || 0, blocks = this.blocks;
  178.     var buffer8 = this.buffer8;
  180.     while (index < length) {
  181.       if (this.hashed) {
  182.         this.hashed = false;
  183.         blocks[0] = blocks[16];
  184.         blocks[16] = blocks[1] = blocks[2] = blocks[3] =
  185.         blocks[4] = blocks[5] = blocks[6] = blocks[7] =
  186.         blocks[8] = blocks[9] = blocks[10] = blocks[11] =
  187.         blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
  188.       }
  190.       if (notString) {
  191.         if (ARRAY_BUFFER) {
  192.           for (i = this.start; index < length && i < 64; ++index) {
  193.             buffer8[i++] = message[index];
  194.           }
  195.         } else {
  196.           for (i = this.start; index < length && i < 64; ++index) {
  197.             blocks[i >> 2] |= message[index] << SHIFT[i++ & 3];
  198.           }
  199.         }
  200.       } else {
  201.         if (ARRAY_BUFFER) {
  202.           for (i = this.start; index < length && i < 64; ++index) {
  203.             code = message.charCodeAt(index);
  204.             if (code < 0x80) {
  205.               buffer8[i++] = code;
  206.             } else if (code < 0x800) {
  207.               buffer8[i++] = 0xc0 | (code >> 6);
  208.               buffer8[i++] = 0x80 | (code & 0x3f);
  209.             } else if (code < 0xd800 || code >= 0xe000) {
  210.               buffer8[i++] = 0xe0 | (code >> 12);
  211.               buffer8[i++] = 0x80 | ((code >> 6) & 0x3f);
  212.               buffer8[i++] = 0x80 | (code & 0x3f);
  213.             } else {
  214.               code = 0x10000 + (((code & 0x3ff) << 10) | (message.charCodeAt(++index) & 0x3ff));
  215.               buffer8[i++] = 0xf0 | (code >> 18);
  216.               buffer8[i++] = 0x80 | ((code >> 12) & 0x3f);
  217.               buffer8[i++] = 0x80 | ((code >> 6) & 0x3f);
  218.               buffer8[i++] = 0x80 | (code & 0x3f);
  219.             }
  220.           }
  221.         } else {
  222.           for (i = this.start; index < length && i < 64; ++index) {
  223.             code = message.charCodeAt(index);
  224.             if (code < 0x80) {
  225.               blocks[i >> 2] |= code << SHIFT[i++ & 3];
  226.             } else if (code < 0x800) {
  227.               blocks[i >> 2] |= (0xc0 | (code >> 6)) << SHIFT[i++ & 3];
  228.               blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
  229.             } else if (code < 0xd800 || code >= 0xe000) {
  230.               blocks[i >> 2] |= (0xe0 | (code >> 12)) << SHIFT[i++ & 3];
  231.               blocks[i >> 2] |= (0x80 | ((code >> 6) & 0x3f)) << SHIFT[i++ & 3];
  232.               blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
  233.             } else {
  234.               code = 0x10000 + (((code & 0x3ff) << 10) | (message.charCodeAt(++index) & 0x3ff));
  235.               blocks[i >> 2] |= (0xf0 | (code >> 18)) << SHIFT[i++ & 3];
  236.               blocks[i >> 2] |= (0x80 | ((code >> 12) & 0x3f)) << SHIFT[i++ & 3];
  237.               blocks[i >> 2] |= (0x80 | ((code >> 6) & 0x3f)) << SHIFT[i++ & 3];
  238.               blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
  239.             }
  240.           }
  241.         }
  242.       }
  243.       this.lastByteIndex = i;
  244.       this.bytes += i - this.start;
  245.       if (i >= 64) {
  246.         this.start = i - 64;
  247.         this.hash();
  248.         this.hashed = true;
  249.       } else {
  250.         this.start = i;
  251.       }
  252.     }
  253.     return this;
  254.   };
  256.   Md4.prototype.finalize = function () {
  257.     if (this.finalized) {
  258.       return;
  259.     }
  260.     this.finalized = true;
  261.     var blocks = this.blocks, i = this.lastByteIndex;
  262.     blocks[i >> 2] |= EXTRA[i & 3];
  263.     if (i >= 56) {
  264.       if (!this.hashed) {
  265.         this.hash();
  266.       }
  267.       blocks[0] = blocks[16];
  268.       blocks[16] = blocks[1] = blocks[2] = blocks[3] =
  269.       blocks[4] = blocks[5] = blocks[6] = blocks[7] =
  270.       blocks[8] = blocks[9] = blocks[10] = blocks[11] =
  271.       blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
  272.     }
  273.     blocks[14] = this.bytes << 3;
  274.     this.hash();
  275.   };
  277.   Md4.prototype.hash = function () {
  278.     var a, b, c, d, ab, bc, cd, da, blocks = this.blocks;
  280.     if (this.first) {
  281.       a = blocks[0] - 1;
  282.       a = (a << 3) | (a >>> 29);
  283.       d = ((a & 0xefcdab89) | (~a & 0x98badcfe)) + blocks[1] + 271733878;
  284.       d = (d << 7) | (d >>> 25);
  285.       c = ((d & a) | (~d & 0xefcdab89)) + blocks[2] - 1732584194;
  286.       c = (c << 11) | (c >>> 21);
  287.       b = ((c & d) | (~c & a)) + blocks[3] - 271733879;
  288.       b = (b << 19) | (b >>> 13);
  289.     } else {
  290.       a = this.h0;
  291.       b = this.h1;
  292.       c = this.h2;
  293.       d = this.h3;
  294.       a += ((b & c) | (~b & d)) + blocks[0];
  295.       a = (a << 3) | (a >>> 29);
  296.       d += ((a & b) | (~a & c)) + blocks[1];
  297.       d = (d << 7) | (d >>> 25);
  298.       c += ((d & a) | (~d & b)) + blocks[2];
  299.       c = (c << 11) | (c >>> 21);
  300.       b += ((c & d) | (~c & a)) + blocks[3];
  301.       b = (b << 19) | (b >>> 13);
  302.     }
  303.     a += ((b & c) | (~b & d)) + blocks[4];
  304.     a = (a << 3) | (a >>> 29);
  305.     d += ((a & b) | (~a & c)) + blocks[5];
  306.     d = (d << 7) | (d >>> 25);
  307.     c += ((d & a) | (~d & b)) + blocks[6];
  308.     c = (c << 11) | (c >>> 21);
  309.     b += ((c & d) | (~c & a)) + blocks[7];
  310.     b = (b << 19) | (b >>> 13);
  311.     a += ((b & c) | (~b & d)) + blocks[8];
  312.     a = (a << 3) | (a >>> 29);
  313.     d += ((a & b) | (~a & c)) + blocks[9];
  314.     d = (d << 7) | (d >>> 25);
  315.     c += ((d & a) | (~d & b)) + blocks[10];
  316.     c = (c << 11) | (c >>> 21);
  317.     b += ((c & d) | (~c & a)) + blocks[11];
  318.     b = (b << 19) | (b >>> 13);
  319.     a += ((b & c) | (~b & d)) + blocks[12];
  320.     a = (a << 3) | (a >>> 29);
  321.     d += ((a & b) | (~a & c)) + blocks[13];
  322.     d = (d << 7) | (d >>> 25);
  323.     c += ((d & a) | (~d & b)) + blocks[14];
  324.     c = (c << 11) | (c >>> 21);
  325.     b += ((c & d) | (~c & a)) + blocks[15];
  326.     b = (b << 19) | (b >>> 13);
  328.     bc = b & c;
  329.     a += (bc | (b & d) | (c & d)) + blocks[0] + 1518500249;
  330.     a = (a << 3) | (a >>> 29);
  331.     ab = a & b;
  332.     d += (ab | (a & c) | bc) + blocks[4] + 1518500249;
  333.     d = (d << 5) | (d >>> 27);
  334.     da = d & a;
  335.     c += (da | (d & b) | ab) + blocks[8] + 1518500249;
  336.     c = (c << 9) | (c >>> 23);
  337.     cd = c & d;
  338.     b += (cd | (c & a) | da) + blocks[12] + 1518500249;
  339.     b = (b << 13) | (b >>> 19);
  340.     bc = b & c;
  341.     a += (bc | (b & d) | cd) + blocks[1] + 1518500249;
  342.     a = (a << 3) | (a >>> 29);
  343.     ab = a & b;
  344.     d += (ab | (a & c) | bc) + blocks[5] + 1518500249;
  345.     d = (d << 5) | (d >>> 27);
  346.     da = d & a;
  347.     c += (da | (d & b) | ab) + blocks[9] + 1518500249;
  348.     c = (c << 9) | (c >>> 23);
  349.     cd = c & d;
  350.     b += (cd | (c & a) | da) + blocks[13] + 1518500249;
  351.     b = (b << 13) | (b >>> 19);
  352.     bc = b & c;
  353.     a += (bc | (b & d) | cd) + blocks[2] + 1518500249;
  354.     a = (a << 3) | (a >>> 29);
  355.     ab = a & b;
  356.     d += (ab | (a & c) | bc) + blocks[6] + 1518500249;
  357.     d = (d << 5) | (d >>> 27);
  358.     da = d & a;
  359.     c += (da | (d & b) | ab) + blocks[10] + 1518500249;
  360.     c = (c << 9) | (c >>> 23);
  361.     cd = c & d;
  362.     b += (cd | (c & a) | da) + blocks[14] + 1518500249;
  363.     b = (b << 13) | (b >>> 19);
  364.     bc = b & c;
  365.     a += (bc | (b & d) | cd) + blocks[3] + 1518500249;
  366.     a = (a << 3) | (a >>> 29);
  367.     ab = a & b;
  368.     d += (ab | (a & c) | bc) + blocks[7] + 1518500249;
  369.     d = (d << 5) | (d >>> 27);
  370.     da = d & a;
  371.     c += (da | (d & b) | ab) + blocks[11] + 1518500249;
  372.     c = (c << 9) | (c >>> 23);
  373.     b += ((c & d) | (c & a) | da) + blocks[15] + 1518500249;
  374.     b = (b << 13) | (b >>> 19);
  376.     bc = b ^ c;
  377.     a += (bc ^ d) + blocks[0] + 1859775393;
  378.     a = (a << 3) | (a >>> 29);
  379.     d += (bc ^ a) + blocks[8] + 1859775393;
  380.     d = (d << 9) | (d >>> 23);
  381.     da = d ^ a;
  382.     c += (da ^ b) + blocks[4] + 1859775393;
  383.     c = (c << 11) | (c >>> 21);
  384.     b += (da ^ c) + blocks[12] + 1859775393;
  385.     b = (b << 15) | (b >>> 17);
  386.     bc = b ^ c;
  387.     a += (bc ^ d) + blocks[2] + 1859775393;
  388.     a = (a << 3) | (a >>> 29);
  389.     d += (bc ^ a) + blocks[10] + 1859775393;
  390.     d = (d << 9) | (d >>> 23);
  391.     da = d ^ a;
  392.     c += (da ^ b) + blocks[6] + 1859775393;
  393.     c = (c << 11) | (c >>> 21);
  394.     b += (da ^ c) + blocks[14] + 1859775393;
  395.     b = (b << 15) | (b >>> 17);
  396.     bc = b ^ c;
  397.     a += (bc ^ d) + blocks[1] + 1859775393;
  398.     a = (a << 3) | (a >>> 29);
  399.     d += (bc ^ a) + blocks[9] + 1859775393;
  400.     d = (d << 9) | (d >>> 23);
  401.     da = d ^ a;
  402.     c += (da ^ b) + blocks[5] + 1859775393;
  403.     c = (c << 11) | (c >>> 21);
  404.     b += (da ^ c) + blocks[13] + 1859775393;
  405.     b = (b << 15) | (b >>> 17);
  406.     bc = b ^ c;
  407.     a += (bc ^ d) + blocks[3] + 1859775393;
  408.     a = (a << 3) | (a >>> 29);
  409.     d += (bc ^ a) + blocks[11] + 1859775393;
  410.     d = (d << 9) | (d >>> 23);
  411.     da = d ^ a;
  412.     c += (da ^ b) + blocks[7] + 1859775393;
  413.     c = (c << 11) | (c >>> 21);
  414.     b += (da ^ c) + blocks[15] + 1859775393;
  415.     b = (b << 15) | (b >>> 17);
  417.     if (this.first) {
  418.       this.h0 = a + 1732584193 << 0;
  419.       this.h1 = b - 271733879 << 0;
  420.       this.h2 = c - 1732584194 << 0;
  421.       this.h3 = d + 271733878 << 0;
  422.       this.first = false;
  423.     } else {
  424.       this.h0 = this.h0 + a << 0;
  425.       this.h1 = this.h1 + b << 0;
  426.       this.h2 = this.h2 + c << 0;
  427.       this.h3 = this.h3 + d << 0;
  428.     }
  429.   };
  431.   /**
  432.    * @method hex
  433.    * @memberof Md4
  434.    * @instance
  435.    * @description Output hash as hex string
  436.    * @returns {String} Hex string
  437.    * @see {@link md4.hex}
  438.    * @example
  439.    * hash.hex();
  440.    */
  441.   Md4.prototype.hex = function () {
  442.     this.finalize();
  444.     var h0 = this.h0, h1 = this.h1, h2 = this.h2, h3 = this.h3;
  446.     return HEX_CHARS[(h0 >> 4) & 0x0F] + HEX_CHARS[h0 & 0x0F] +
  447.       HEX_CHARS[(h0 >> 12) & 0x0F] + HEX_CHARS[(h0 >> 8) & 0x0F] +
  448.       HEX_CHARS[(h0 >> 20) & 0x0F] + HEX_CHARS[(h0 >> 16) & 0x0F] +
  449.       HEX_CHARS[(h0 >> 28) & 0x0F] + HEX_CHARS[(h0 >> 24) & 0x0F] +
  450.       HEX_CHARS[(h1 >> 4) & 0x0F] + HEX_CHARS[h1 & 0x0F] +
  451.       HEX_CHARS[(h1 >> 12) & 0x0F] + HEX_CHARS[(h1 >> 8) & 0x0F] +
  452.       HEX_CHARS[(h1 >> 20) & 0x0F] + HEX_CHARS[(h1 >> 16) & 0x0F] +
  453.       HEX_CHARS[(h1 >> 28) & 0x0F] + HEX_CHARS[(h1 >> 24) & 0x0F] +
  454.       HEX_CHARS[(h2 >> 4) & 0x0F] + HEX_CHARS[h2 & 0x0F] +
  455.       HEX_CHARS[(h2 >> 12) & 0x0F] + HEX_CHARS[(h2 >> 8) & 0x0F] +
  456.       HEX_CHARS[(h2 >> 20) & 0x0F] + HEX_CHARS[(h2 >> 16) & 0x0F] +
  457.       HEX_CHARS[(h2 >> 28) & 0x0F] + HEX_CHARS[(h2 >> 24) & 0x0F] +
  458.       HEX_CHARS[(h3 >> 4) & 0x0F] + HEX_CHARS[h3 & 0x0F] +
  459.       HEX_CHARS[(h3 >> 12) & 0x0F] + HEX_CHARS[(h3 >> 8) & 0x0F] +
  460.       HEX_CHARS[(h3 >> 20) & 0x0F] + HEX_CHARS[(h3 >> 16) & 0x0F] +
  461.       HEX_CHARS[(h3 >> 28) & 0x0F] + HEX_CHARS[(h3 >> 24) & 0x0F];
  462.   };
  464.   /**
  465.    * @method toString
  466.    * @memberof Md4
  467.    * @instance
  468.    * @description Output hash as hex string
  469.    * @returns {String} Hex string
  470.    * @see {@link md4.hex}
  471.    * @example
  472.    * hash.toString();
  473.    */
  474.   Md4.prototype.toString = Md4.prototype.hex;
  476.   /**
  477.    * @method digest
  478.    * @memberof Md4
  479.    * @instance
  480.    * @description Output hash as bytes array
  481.    * @returns {Array} Bytes array
  482.    * @see {@link md4.digest}
  483.    * @example
  484.    * hash.digest();
  485.    */
  486.   Md4.prototype.digest = function() {
  487.     this.finalize();
  489.     var h0 = this.h0, h1 = this.h1, h2 = this.h2, h3 = this.h3;
  490.     return [
  491.       h0 & 0xFF, (h0 >> 8) & 0xFF, (h0 >> 16) & 0xFF, (h0 >> 24) & 0xFF,
  492.       h1 & 0xFF, (h1 >> 8) & 0xFF, (h1 >> 16) & 0xFF, (h1 >> 24) & 0xFF,
  493.       h2 & 0xFF, (h2 >> 8) & 0xFF, (h2 >> 16) & 0xFF, (h2 >> 24) & 0xFF,
  494.       h3 & 0xFF, (h3 >> 8) & 0xFF, (h3 >> 16) & 0xFF, (h3 >> 24) & 0xFF
  495.     ];
  496.   };
  498.   /**
  499.    * @method array
  500.    * @memberof Md4
  501.    * @instance
  502.    * @description Output hash as bytes array
  503.    * @returns {Array} Bytes array
  504.    * @see {@link md4.array}
  505.    * @example
  506.    * hash.array();
  507.    */
  508.   Md4.prototype.array = Md4.prototype.digest;
  510.   /**
  511.    * @method arrayBuffer
  512.    * @memberof Md4
  513.    * @instance
  514.    * @description Output hash as ArrayBuffer
  515.    * @returns {ArrayBuffer} ArrayBuffer
  516.    * @see {@link md4.arrayBuffer}
  517.    * @example
  518.    * hash.arrayBuffer();
  519.    */
  520.   Md4.prototype.arrayBuffer = function() {
  521.     this.finalize();
  523.     var buffer = new ArrayBuffer(16);
  524.     var blocks = new Uint32Array(buffer);
  525.     blocks[0] = this.h0;
  526.     blocks[1] = this.h1;
  527.     blocks[2] = this.h2;
  528.     blocks[3] = this.h3;
  529.     return buffer;
  530.   };
  532.   /**
  533.    * @method buffer
  534.    * @deprecated This maybe confuse with Buffer in node.js. Please use arrayBuffer instead.
  535.    * @memberof Md4
  536.    * @instance
  537.    * @description Output hash as ArrayBuffer
  538.    * @returns {ArrayBuffer} ArrayBuffer
  539.    * @see {@link md4.buffer}
  540.    * @example
  541.    * hash.buffer();
  542.    */
  543.   Md4.prototype.buffer = Md4.prototype.arrayBuffer;
  545.   var exports = createMethod();
  547.   if (COMMON_JS) {
  548.     module.exports = exports;
  549.   } else {
  550.     /**
  551.      * @method md4
  552.      * @description MD4 hash function, export to global in browsers.
  553.      * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
  554.      * @returns {String} md4 hashes
  555.      * @example
  556.      * md4(''); // 31d6cfe0d16ae931b73c59d7e0c089c0
  557.      * md4('The quick brown fox jumps over the lazy dog'); // 1bee69a46ba811185c194762abaeae90
  558.      * md4('The quick brown fox jumps over the lazy dog.'); // 2812c6c7136898c51f6f6739ad08750e
  559.      *
  560.      * // It also supports UTF-8 encoding
  561.      * md4('中文'); // 223088bf7bd45a16436b15360c5fc5a0
  562.      *
  563.      * // It also supports byte `Array`, `Uint8Array`, `ArrayBuffer`
  564.      * md4([]); // 31d6cfe0d16ae931b73c59d7e0c089c0
  565.      * md4(new Uint8Array([])); // 31d6cfe0d16ae931b73c59d7e0c089c0
  566.      */
  567.     root.md4 = exports;
  568.     if (AMD) {
  569.       define(function () {
  570.         return exports;
  571.       });
  572.     }
  573.   }
  574. })();