reader/utils/md5.js

/**
 * [js-md5]{@link https://github.com/emn178/js-md5}
 *
 * @namespace md5
 * @version 0.7.3
 * @author Chen, Yi-Cyuan [emn178@gmail.com]
 * @copyright Chen, Yi-Cyuan 2014-2017
 * @license MIT
 */
(function () {
    'use strict';
  
    var ERROR = 'input is invalid type';
    var WINDOW = typeof window === 'object';
    var root = WINDOW ? window : {};
    if (root.JS_MD5_NO_WINDOW) {
      WINDOW = false;
    }
    var WEB_WORKER = !WINDOW && typeof self === 'object';
    var NODE_JS = !root.JS_MD5_NO_NODE_JS && typeof process === 'object' && process.versions && process.versions.node;
    if (NODE_JS) {
      root = global;
    } else if (WEB_WORKER) {
      root = self;
    }
    var COMMON_JS = !root.JS_MD5_NO_COMMON_JS && typeof module === 'object' && module.exports;
    var AMD = typeof define === 'function' && define.amd;
    var ARRAY_BUFFER = !root.JS_MD5_NO_ARRAY_BUFFER && typeof ArrayBuffer !== 'undefined';
    var HEX_CHARS = '0123456789abcdef'.split('');
    var EXTRA = [128, 32768, 8388608, -2147483648];
    var SHIFT = [0, 8, 16, 24];
    var OUTPUT_TYPES = ['hex', 'array', 'digest', 'buffer', 'arrayBuffer', 'base64'];
    var BASE64_ENCODE_CHAR = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');
  
    var blocks = [], buffer8;
    if (ARRAY_BUFFER) {
      var buffer = new ArrayBuffer(68);
      buffer8 = new Uint8Array(buffer);
      blocks = new Uint32Array(buffer);
    }
  
    if (root.JS_MD5_NO_NODE_JS || !Array.isArray) {
      Array.isArray = function (obj) {
        return Object.prototype.toString.call(obj) === '[object Array]';
      };
    }
  
    if (ARRAY_BUFFER && (root.JS_MD5_NO_ARRAY_BUFFER_IS_VIEW || !ArrayBuffer.isView)) {
      ArrayBuffer.isView = function (obj) {
        return typeof obj === 'object' && obj.buffer && obj.buffer.constructor === ArrayBuffer;
      };
    }
  
    /**
     * @method hex
     * @memberof md5
     * @description Output hash as hex string
     * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
     * @returns {String} Hex string
     * @example
     * md5.hex('The quick brown fox jumps over the lazy dog');
     * // equal to
     * md5('The quick brown fox jumps over the lazy dog');
     */
    /**
     * @method digest
     * @memberof md5
     * @description Output hash as bytes array
     * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
     * @returns {Array} Bytes array
     * @example
     * md5.digest('The quick brown fox jumps over the lazy dog');
     */
    /**
     * @method array
     * @memberof md5
     * @description Output hash as bytes array
     * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
     * @returns {Array} Bytes array
     * @example
     * md5.array('The quick brown fox jumps over the lazy dog');
     */
    /**
     * @method arrayBuffer
     * @memberof md5
     * @description Output hash as ArrayBuffer
     * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
     * @returns {ArrayBuffer} ArrayBuffer
     * @example
     * md5.arrayBuffer('The quick brown fox jumps over the lazy dog');
     */
    /**
     * @method buffer
     * @deprecated This maybe confuse with Buffer in node.js. Please use arrayBuffer instead.
     * @memberof md5
     * @description Output hash as ArrayBuffer
     * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
     * @returns {ArrayBuffer} ArrayBuffer
     * @example
     * md5.buffer('The quick brown fox jumps over the lazy dog');
     */
    /**
     * @method base64
     * @memberof md5
     * @description Output hash as base64 string
     * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
     * @returns {String} base64 string
     * @example
     * md5.base64('The quick brown fox jumps over the lazy dog');
     */
    var createOutputMethod = function (outputType) {
      return function (message) {
        return new Md5(true).update(message)[outputType]();
      };
    };
  
    /**
     * @method create
     * @memberof md5
     * @description Create Md5 object
     * @returns {Md5} Md5 object.
     * @example
     * var hash = md5.create();
     */
    /**
     * @method update
     * @memberof md5
     * @description Create and update Md5 object
     * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
     * @returns {Md5} Md5 object.
     * @example
     * var hash = md5.update('The quick brown fox jumps over the lazy dog');
     * // equal to
     * var hash = md5.create();
     * hash.update('The quick brown fox jumps over the lazy dog');
     */
    var createMethod = function () {
      var method = createOutputMethod('hex');
      if (NODE_JS) {
        method = nodeWrap(method);
      }
      method.create = function () {
        return new Md5();
      };
      method.update = function (message) {
        return method.create().update(message);
      };
      for (var i = 0; i < OUTPUT_TYPES.length; ++i) {
        var type = OUTPUT_TYPES[i];
        method[type] = createOutputMethod(type);
      }
      return method;
    };
  
    var nodeWrap = function (method) {
      var crypto = eval("require('crypto')");
      var Buffer = eval("require('buffer').Buffer");
      var nodeMethod = function (message) {
        if (typeof message === 'string') {
          return crypto.createHash('md5').update(message, 'utf8').digest('hex');
        } else {
          if (message === null || message === undefined) {
            throw ERROR;
          } else if (message.constructor === ArrayBuffer) {
            message = new Uint8Array(message);
          }
        }
        if (Array.isArray(message) || ArrayBuffer.isView(message) ||
          message.constructor === Buffer) {
          return crypto.createHash('md5').update(new Buffer(message)).digest('hex');
        } else {
          return method(message);
        }
      };
      return nodeMethod;
    };
  
    /**
     * Md5 class
     * @class Md5
     * @description This is internal class.
     * @see {@link md5.create}
     */
    function Md5(sharedMemory) {
      if (sharedMemory) {
        blocks[0] = blocks[16] = blocks[1] = blocks[2] = blocks[3] =
        blocks[4] = blocks[5] = blocks[6] = blocks[7] =
        blocks[8] = blocks[9] = blocks[10] = blocks[11] =
        blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
        this.blocks = blocks;
        this.buffer8 = buffer8;
      } else {
        if (ARRAY_BUFFER) {
          var buffer = new ArrayBuffer(68);
          this.buffer8 = new Uint8Array(buffer);
          this.blocks = new Uint32Array(buffer);
        } else {
          this.blocks = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        }
      }
      this.h0 = this.h1 = this.h2 = this.h3 = this.start = this.bytes = this.hBytes = 0;
      this.finalized = this.hashed = false;
      this.first = true;
    }
  
    /**
     * @method update
     * @memberof Md5
     * @instance
     * @description Update hash
     * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
     * @returns {Md5} Md5 object.
     * @see {@link md5.update}
     */
    Md5.prototype.update = function (message) {
      if (this.finalized) {
        return;
      }
  
      var notString, type = typeof message;
      if (type !== 'string') {
        if (type === 'object') {
          if (message === null) {
            throw ERROR;
          } else if (ARRAY_BUFFER && message.constructor === ArrayBuffer) {
            message = new Uint8Array(message);
          } else if (!Array.isArray(message)) {
            if (!ARRAY_BUFFER || !ArrayBuffer.isView(message)) {
              throw ERROR;
            }
          }
        } else {
          throw ERROR;
        }
        notString = true;
      }
      var code, index = 0, i, length = message.length, blocks = this.blocks;
      var buffer8 = this.buffer8;
  
      while (index < length) {
        if (this.hashed) {
          this.hashed = false;
          blocks[0] = blocks[16];
          blocks[16] = blocks[1] = blocks[2] = blocks[3] =
          blocks[4] = blocks[5] = blocks[6] = blocks[7] =
          blocks[8] = blocks[9] = blocks[10] = blocks[11] =
          blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
        }
  
        if (notString) {
          if (ARRAY_BUFFER) {
            for (i = this.start; index < length && i < 64; ++index) {
              buffer8[i++] = message[index];
            }
          } else {
            for (i = this.start; index < length && i < 64; ++index) {
              blocks[i >> 2] |= message[index] << SHIFT[i++ & 3];
            }
          }
        } else {
          if (ARRAY_BUFFER) {
            for (i = this.start; index < length && i < 64; ++index) {
              code = message.charCodeAt(index);
              if (code < 0x80) {
                buffer8[i++] = code;
              } else if (code < 0x800) {
                buffer8[i++] = 0xc0 | (code >> 6);
                buffer8[i++] = 0x80 | (code & 0x3f);
              } else if (code < 0xd800 || code >= 0xe000) {
                buffer8[i++] = 0xe0 | (code >> 12);
                buffer8[i++] = 0x80 | ((code >> 6) & 0x3f);
                buffer8[i++] = 0x80 | (code & 0x3f);
              } else {
                code = 0x10000 + (((code & 0x3ff) << 10) | (message.charCodeAt(++index) & 0x3ff));
                buffer8[i++] = 0xf0 | (code >> 18);
                buffer8[i++] = 0x80 | ((code >> 12) & 0x3f);
                buffer8[i++] = 0x80 | ((code >> 6) & 0x3f);
                buffer8[i++] = 0x80 | (code & 0x3f);
              }
            }
          } else {
            for (i = this.start; index < length && i < 64; ++index) {
              code = message.charCodeAt(index);
              if (code < 0x80) {
                blocks[i >> 2] |= code << SHIFT[i++ & 3];
              } else if (code < 0x800) {
                blocks[i >> 2] |= (0xc0 | (code >> 6)) << SHIFT[i++ & 3];
                blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
              } else if (code < 0xd800 || code >= 0xe000) {
                blocks[i >> 2] |= (0xe0 | (code >> 12)) << SHIFT[i++ & 3];
                blocks[i >> 2] |= (0x80 | ((code >> 6) & 0x3f)) << SHIFT[i++ & 3];
                blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
              } else {
                code = 0x10000 + (((code & 0x3ff) << 10) | (message.charCodeAt(++index) & 0x3ff));
                blocks[i >> 2] |= (0xf0 | (code >> 18)) << SHIFT[i++ & 3];
                blocks[i >> 2] |= (0x80 | ((code >> 12) & 0x3f)) << SHIFT[i++ & 3];
                blocks[i >> 2] |= (0x80 | ((code >> 6) & 0x3f)) << SHIFT[i++ & 3];
                blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
              }
            }
          }
        }
        this.lastByteIndex = i;
        this.bytes += i - this.start;
        if (i >= 64) {
          this.start = i - 64;
          this.hash();
          this.hashed = true;
        } else {
          this.start = i;
        }
      }
      if (this.bytes > 4294967295) {
        this.hBytes += this.bytes / 4294967296 << 0;
        this.bytes = this.bytes % 4294967296;
      }
      return this;
    };
  
    Md5.prototype.finalize = function () {
      if (this.finalized) {
        return;
      }
      this.finalized = true;
      var blocks = this.blocks, i = this.lastByteIndex;
      blocks[i >> 2] |= EXTRA[i & 3];
      if (i >= 56) {
        if (!this.hashed) {
          this.hash();
        }
        blocks[0] = blocks[16];
        blocks[16] = blocks[1] = blocks[2] = blocks[3] =
        blocks[4] = blocks[5] = blocks[6] = blocks[7] =
        blocks[8] = blocks[9] = blocks[10] = blocks[11] =
        blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
      }
      blocks[14] = this.bytes << 3;
      blocks[15] = this.hBytes << 3 | this.bytes >>> 29;
      this.hash();
    };
  
    Md5.prototype.hash = function () {
      var a, b, c, d, bc, da, blocks = this.blocks;
  
      if (this.first) {
        a = blocks[0] - 680876937;
        a = (a << 7 | a >>> 25) - 271733879 << 0;
        d = (-1732584194 ^ a & 2004318071) + blocks[1] - 117830708;
        d = (d << 12 | d >>> 20) + a << 0;
        c = (-271733879 ^ (d & (a ^ -271733879))) + blocks[2] - 1126478375;
        c = (c << 17 | c >>> 15) + d << 0;
        b = (a ^ (c & (d ^ a))) + blocks[3] - 1316259209;
        b = (b << 22 | b >>> 10) + c << 0;
      } else {
        a = this.h0;
        b = this.h1;
        c = this.h2;
        d = this.h3;
        a += (d ^ (b & (c ^ d))) + blocks[0] - 680876936;
        a = (a << 7 | a >>> 25) + b << 0;
        d += (c ^ (a & (b ^ c))) + blocks[1] - 389564586;
        d = (d << 12 | d >>> 20) + a << 0;
        c += (b ^ (d & (a ^ b))) + blocks[2] + 606105819;
        c = (c << 17 | c >>> 15) + d << 0;
        b += (a ^ (c & (d ^ a))) + blocks[3] - 1044525330;
        b = (b << 22 | b >>> 10) + c << 0;
      }
  
      a += (d ^ (b & (c ^ d))) + blocks[4] - 176418897;
      a = (a << 7 | a >>> 25) + b << 0;
      d += (c ^ (a & (b ^ c))) + blocks[5] + 1200080426;
      d = (d << 12 | d >>> 20) + a << 0;
      c += (b ^ (d & (a ^ b))) + blocks[6] - 1473231341;
      c = (c << 17 | c >>> 15) + d << 0;
      b += (a ^ (c & (d ^ a))) + blocks[7] - 45705983;
      b = (b << 22 | b >>> 10) + c << 0;
      a += (d ^ (b & (c ^ d))) + blocks[8] + 1770035416;
      a = (a << 7 | a >>> 25) + b << 0;
      d += (c ^ (a & (b ^ c))) + blocks[9] - 1958414417;
      d = (d << 12 | d >>> 20) + a << 0;
      c += (b ^ (d & (a ^ b))) + blocks[10] - 42063;
      c = (c << 17 | c >>> 15) + d << 0;
      b += (a ^ (c & (d ^ a))) + blocks[11] - 1990404162;
      b = (b << 22 | b >>> 10) + c << 0;
      a += (d ^ (b & (c ^ d))) + blocks[12] + 1804603682;
      a = (a << 7 | a >>> 25) + b << 0;
      d += (c ^ (a & (b ^ c))) + blocks[13] - 40341101;
      d = (d << 12 | d >>> 20) + a << 0;
      c += (b ^ (d & (a ^ b))) + blocks[14] - 1502002290;
      c = (c << 17 | c >>> 15) + d << 0;
      b += (a ^ (c & (d ^ a))) + blocks[15] + 1236535329;
      b = (b << 22 | b >>> 10) + c << 0;
      a += (c ^ (d & (b ^ c))) + blocks[1] - 165796510;
      a = (a << 5 | a >>> 27) + b << 0;
      d += (b ^ (c & (a ^ b))) + blocks[6] - 1069501632;
      d = (d << 9 | d >>> 23) + a << 0;
      c += (a ^ (b & (d ^ a))) + blocks[11] + 643717713;
      c = (c << 14 | c >>> 18) + d << 0;
      b += (d ^ (a & (c ^ d))) + blocks[0] - 373897302;
      b = (b << 20 | b >>> 12) + c << 0;
      a += (c ^ (d & (b ^ c))) + blocks[5] - 701558691;
      a = (a << 5 | a >>> 27) + b << 0;
      d += (b ^ (c & (a ^ b))) + blocks[10] + 38016083;
      d = (d << 9 | d >>> 23) + a << 0;
      c += (a ^ (b & (d ^ a))) + blocks[15] - 660478335;
      c = (c << 14 | c >>> 18) + d << 0;
      b += (d ^ (a & (c ^ d))) + blocks[4] - 405537848;
      b = (b << 20 | b >>> 12) + c << 0;
      a += (c ^ (d & (b ^ c))) + blocks[9] + 568446438;
      a = (a << 5 | a >>> 27) + b << 0;
      d += (b ^ (c & (a ^ b))) + blocks[14] - 1019803690;
      d = (d << 9 | d >>> 23) + a << 0;
      c += (a ^ (b & (d ^ a))) + blocks[3] - 187363961;
      c = (c << 14 | c >>> 18) + d << 0;
      b += (d ^ (a & (c ^ d))) + blocks[8] + 1163531501;
      b = (b << 20 | b >>> 12) + c << 0;
      a += (c ^ (d & (b ^ c))) + blocks[13] - 1444681467;
      a = (a << 5 | a >>> 27) + b << 0;
      d += (b ^ (c & (a ^ b))) + blocks[2] - 51403784;
      d = (d << 9 | d >>> 23) + a << 0;
      c += (a ^ (b & (d ^ a))) + blocks[7] + 1735328473;
      c = (c << 14 | c >>> 18) + d << 0;
      b += (d ^ (a & (c ^ d))) + blocks[12] - 1926607734;
      b = (b << 20 | b >>> 12) + c << 0;
      bc = b ^ c;
      a += (bc ^ d) + blocks[5] - 378558;
      a = (a << 4 | a >>> 28) + b << 0;
      d += (bc ^ a) + blocks[8] - 2022574463;
      d = (d << 11 | d >>> 21) + a << 0;
      da = d ^ a;
      c += (da ^ b) + blocks[11] + 1839030562;
      c = (c << 16 | c >>> 16) + d << 0;
      b += (da ^ c) + blocks[14] - 35309556;
      b = (b << 23 | b >>> 9) + c << 0;
      bc = b ^ c;
      a += (bc ^ d) + blocks[1] - 1530992060;
      a = (a << 4 | a >>> 28) + b << 0;
      d += (bc ^ a) + blocks[4] + 1272893353;
      d = (d << 11 | d >>> 21) + a << 0;
      da = d ^ a;
      c += (da ^ b) + blocks[7] - 155497632;
      c = (c << 16 | c >>> 16) + d << 0;
      b += (da ^ c) + blocks[10] - 1094730640;
      b = (b << 23 | b >>> 9) + c << 0;
      bc = b ^ c;
      a += (bc ^ d) + blocks[13] + 681279174;
      a = (a << 4 | a >>> 28) + b << 0;
      d += (bc ^ a) + blocks[0] - 358537222;
      d = (d << 11 | d >>> 21) + a << 0;
      da = d ^ a;
      c += (da ^ b) + blocks[3] - 722521979;
      c = (c << 16 | c >>> 16) + d << 0;
      b += (da ^ c) + blocks[6] + 76029189;
      b = (b << 23 | b >>> 9) + c << 0;
      bc = b ^ c;
      a += (bc ^ d) + blocks[9] - 640364487;
      a = (a << 4 | a >>> 28) + b << 0;
      d += (bc ^ a) + blocks[12] - 421815835;
      d = (d << 11 | d >>> 21) + a << 0;
      da = d ^ a;
      c += (da ^ b) + blocks[15] + 530742520;
      c = (c << 16 | c >>> 16) + d << 0;
      b += (da ^ c) + blocks[2] - 995338651;
      b = (b << 23 | b >>> 9) + c << 0;
      a += (c ^ (b | ~d)) + blocks[0] - 198630844;
      a = (a << 6 | a >>> 26) + b << 0;
      d += (b ^ (a | ~c)) + blocks[7] + 1126891415;
      d = (d << 10 | d >>> 22) + a << 0;
      c += (a ^ (d | ~b)) + blocks[14] - 1416354905;
      c = (c << 15 | c >>> 17) + d << 0;
      b += (d ^ (c | ~a)) + blocks[5] - 57434055;
      b = (b << 21 | b >>> 11) + c << 0;
      a += (c ^ (b | ~d)) + blocks[12] + 1700485571;
      a = (a << 6 | a >>> 26) + b << 0;
      d += (b ^ (a | ~c)) + blocks[3] - 1894986606;
      d = (d << 10 | d >>> 22) + a << 0;
      c += (a ^ (d | ~b)) + blocks[10] - 1051523;
      c = (c << 15 | c >>> 17) + d << 0;
      b += (d ^ (c | ~a)) + blocks[1] - 2054922799;
      b = (b << 21 | b >>> 11) + c << 0;
      a += (c ^ (b | ~d)) + blocks[8] + 1873313359;
      a = (a << 6 | a >>> 26) + b << 0;
      d += (b ^ (a | ~c)) + blocks[15] - 30611744;
      d = (d << 10 | d >>> 22) + a << 0;
      c += (a ^ (d | ~b)) + blocks[6] - 1560198380;
      c = (c << 15 | c >>> 17) + d << 0;
      b += (d ^ (c | ~a)) + blocks[13] + 1309151649;
      b = (b << 21 | b >>> 11) + c << 0;
      a += (c ^ (b | ~d)) + blocks[4] - 145523070;
      a = (a << 6 | a >>> 26) + b << 0;
      d += (b ^ (a | ~c)) + blocks[11] - 1120210379;
      d = (d << 10 | d >>> 22) + a << 0;
      c += (a ^ (d | ~b)) + blocks[2] + 718787259;
      c = (c << 15 | c >>> 17) + d << 0;
      b += (d ^ (c | ~a)) + blocks[9] - 343485551;
      b = (b << 21 | b >>> 11) + c << 0;
  
      if (this.first) {
        this.h0 = a + 1732584193 << 0;
        this.h1 = b - 271733879 << 0;
        this.h2 = c - 1732584194 << 0;
        this.h3 = d + 271733878 << 0;
        this.first = false;
      } else {
        this.h0 = this.h0 + a << 0;
        this.h1 = this.h1 + b << 0;
        this.h2 = this.h2 + c << 0;
        this.h3 = this.h3 + d << 0;
      }
    };
  
    /**
     * @method hex
     * @memberof Md5
     * @instance
     * @description Output hash as hex string
     * @returns {String} Hex string
     * @see {@link md5.hex}
     * @example
     * hash.hex();
     */
    Md5.prototype.hex = function () {
      this.finalize();
  
      var h0 = this.h0, h1 = this.h1, h2 = this.h2, h3 = this.h3;
  
      return HEX_CHARS[(h0 >> 4) & 0x0F] + HEX_CHARS[h0 & 0x0F] +
        HEX_CHARS[(h0 >> 12) & 0x0F] + HEX_CHARS[(h0 >> 8) & 0x0F] +
        HEX_CHARS[(h0 >> 20) & 0x0F] + HEX_CHARS[(h0 >> 16) & 0x0F] +
        HEX_CHARS[(h0 >> 28) & 0x0F] + HEX_CHARS[(h0 >> 24) & 0x0F] +
        HEX_CHARS[(h1 >> 4) & 0x0F] + HEX_CHARS[h1 & 0x0F] +
        HEX_CHARS[(h1 >> 12) & 0x0F] + HEX_CHARS[(h1 >> 8) & 0x0F] +
        HEX_CHARS[(h1 >> 20) & 0x0F] + HEX_CHARS[(h1 >> 16) & 0x0F] +
        HEX_CHARS[(h1 >> 28) & 0x0F] + HEX_CHARS[(h1 >> 24) & 0x0F] +
        HEX_CHARS[(h2 >> 4) & 0x0F] + HEX_CHARS[h2 & 0x0F] +
        HEX_CHARS[(h2 >> 12) & 0x0F] + HEX_CHARS[(h2 >> 8) & 0x0F] +
        HEX_CHARS[(h2 >> 20) & 0x0F] + HEX_CHARS[(h2 >> 16) & 0x0F] +
        HEX_CHARS[(h2 >> 28) & 0x0F] + HEX_CHARS[(h2 >> 24) & 0x0F] +
        HEX_CHARS[(h3 >> 4) & 0x0F] + HEX_CHARS[h3 & 0x0F] +
        HEX_CHARS[(h3 >> 12) & 0x0F] + HEX_CHARS[(h3 >> 8) & 0x0F] +
        HEX_CHARS[(h3 >> 20) & 0x0F] + HEX_CHARS[(h3 >> 16) & 0x0F] +
        HEX_CHARS[(h3 >> 28) & 0x0F] + HEX_CHARS[(h3 >> 24) & 0x0F];
    };
  
    /**
     * @method toString
     * @memberof Md5
     * @instance
     * @description Output hash as hex string
     * @returns {String} Hex string
     * @see {@link md5.hex}
     * @example
     * hash.toString();
     */
    Md5.prototype.toString = Md5.prototype.hex;
  
    /**
     * @method digest
     * @memberof Md5
     * @instance
     * @description Output hash as bytes array
     * @returns {Array} Bytes array
     * @see {@link md5.digest}
     * @example
     * hash.digest();
     */
    Md5.prototype.digest = function () {
      this.finalize();
  
      var h0 = this.h0, h1 = this.h1, h2 = this.h2, h3 = this.h3;
      return [
        h0 & 0xFF, (h0 >> 8) & 0xFF, (h0 >> 16) & 0xFF, (h0 >> 24) & 0xFF,
        h1 & 0xFF, (h1 >> 8) & 0xFF, (h1 >> 16) & 0xFF, (h1 >> 24) & 0xFF,
        h2 & 0xFF, (h2 >> 8) & 0xFF, (h2 >> 16) & 0xFF, (h2 >> 24) & 0xFF,
        h3 & 0xFF, (h3 >> 8) & 0xFF, (h3 >> 16) & 0xFF, (h3 >> 24) & 0xFF
      ];
    };
  
    /**
     * @method array
     * @memberof Md5
     * @instance
     * @description Output hash as bytes array
     * @returns {Array} Bytes array
     * @see {@link md5.array}
     * @example
     * hash.array();
     */
    Md5.prototype.array = Md5.prototype.digest;
  
    /**
     * @method arrayBuffer
     * @memberof Md5
     * @instance
     * @description Output hash as ArrayBuffer
     * @returns {ArrayBuffer} ArrayBuffer
     * @see {@link md5.arrayBuffer}
     * @example
     * hash.arrayBuffer();
     */
    Md5.prototype.arrayBuffer = function () {
      this.finalize();
  
      var buffer = new ArrayBuffer(16);
      var blocks = new Uint32Array(buffer);
      blocks[0] = this.h0;
      blocks[1] = this.h1;
      blocks[2] = this.h2;
      blocks[3] = this.h3;
      return buffer;
    };
  
    /**
     * @method buffer
     * @deprecated This maybe confuse with Buffer in node.js. Please use arrayBuffer instead.
     * @memberof Md5
     * @instance
     * @description Output hash as ArrayBuffer
     * @returns {ArrayBuffer} ArrayBuffer
     * @see {@link md5.buffer}
     * @example
     * hash.buffer();
     */
    Md5.prototype.buffer = Md5.prototype.arrayBuffer;
  
    /**
     * @method base64
     * @memberof Md5
     * @instance
     * @description Output hash as base64 string
     * @returns {String} base64 string
     * @see {@link md5.base64}
     * @example
     * hash.base64();
     */
    Md5.prototype.base64 = function () {
      var v1, v2, v3, base64Str = '', bytes = this.array();
      for (var i = 0; i < 15;) {
        v1 = bytes[i++];
        v2 = bytes[i++];
        v3 = bytes[i++];
        base64Str += BASE64_ENCODE_CHAR[v1 >>> 2] +
          BASE64_ENCODE_CHAR[(v1 << 4 | v2 >>> 4) & 63] +
          BASE64_ENCODE_CHAR[(v2 << 2 | v3 >>> 6) & 63] +
          BASE64_ENCODE_CHAR[v3 & 63];
      }
      v1 = bytes[i];
      base64Str += BASE64_ENCODE_CHAR[v1 >>> 2] +
        BASE64_ENCODE_CHAR[(v1 << 4) & 63] +
        '==';
      return base64Str;
    };
  
    var exports = createMethod();
  
    if (COMMON_JS) {
      module.exports = exports;
    } else {
      /**
       * @method md5
       * @description Md5 hash function, export to global in browsers.
       * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
       * @returns {String} md5 hashes
       * @example
       * md5(''); // d41d8cd98f00b204e9800998ecf8427e
       * md5('The quick brown fox jumps over the lazy dog'); // 9e107d9d372bb6826bd81d3542a419d6
       * md5('The quick brown fox jumps over the lazy dog.'); // e4d909c290d0fb1ca068ffaddf22cbd0
       *
       * // It also supports UTF-8 encoding
       * md5('中文'); // a7bac2239fcdcb3a067903d8077c4a07
       *
       * // It also supports byte `Array`, `Uint8Array`, `ArrayBuffer`
       * md5([]); // d41d8cd98f00b204e9800998ecf8427e
       * md5(new Uint8Array([])); // d41d8cd98f00b204e9800998ecf8427e
       */
      root.md5 = exports;
      if (AMD) {
        define(function () {
          return exports;
        });
      }
    }
  })();