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    <h1 class="page-title">Source: md5.js</h1>

    
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            <pre class="prettyprint source linenums"><code>/**
 * [js-md5]{@link https://github.com/emn178/js-md5}
 *
 * @namespace md5
 * @version 0.8.0
 * @author Chen, Yi-Cyuan [emn178@gmail.com]
 * @copyright Chen, Yi-Cyuan 2014-2023
 * @license MIT
 */
(function () {
  'use strict';

  var INPUT_ERROR = 'input is invalid type';
  var FINALIZE_ERROR = 'finalize already called';
  var WINDOW = typeof window === 'object';
  var root = WINDOW ? window : {};
  if (root.JS_MD5_NO_WINDOW) {
    WINDOW = false;
  }
  var WEB_WORKER = !WINDOW &amp;&amp; typeof self === 'object';
  var NODE_JS = !root.JS_MD5_NO_NODE_JS &amp;&amp; typeof process === 'object' &amp;&amp; process.versions &amp;&amp; process.versions.node;
  if (NODE_JS) {
    root = global;
  } else if (WEB_WORKER) {
    root = self;
  }
  var COMMON_JS = !root.JS_MD5_NO_COMMON_JS &amp;&amp; typeof module === 'object' &amp;&amp; module.exports;
  var AMD = typeof define === 'function' &amp;&amp; define.amd;
  var ARRAY_BUFFER = !root.JS_MD5_NO_ARRAY_BUFFER &amp;&amp; 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);
  }

  var isArray = Array.isArray;
  if (root.JS_MD5_NO_NODE_JS || !isArray) {
    isArray = function (obj) {
      return Object.prototype.toString.call(obj) === '[object Array]';
    };
  }

  var isView = ArrayBuffer.isView;
  if (ARRAY_BUFFER &amp;&amp; (root.JS_MD5_NO_ARRAY_BUFFER_IS_VIEW || !isView)) {
    isView = function (obj) {
      return typeof obj === 'object' &amp;&amp; obj.buffer &amp;&amp; obj.buffer.constructor === ArrayBuffer;
    };
  }

  // [message: string, isString: bool]
  var formatMessage = function (message) {
    var type = typeof message;
    if (type === 'string') {
      return [message, true];
    }
    if (type !== 'object' || message === null) {
      throw new Error(INPUT_ERROR);
    }
    if (ARRAY_BUFFER &amp;&amp; message.constructor === ArrayBuffer) {
      return [new Uint8Array(message), false];
    }
    if (!isArray(message) &amp;&amp; !isView(message)) {
      throw new Error(INPUT_ERROR);
    }
    return [message, false];
  }

  /**
   * @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 &lt; OUTPUT_TYPES.length; ++i) {
      var type = OUTPUT_TYPES[i];
      method[type] = createOutputMethod(type);
    }
    return method;
  };

  var nodeWrap = function (method) {
    var crypto = require('crypto')
    var Buffer = require('buffer').Buffer;
    var bufferFrom;
    if (Buffer.from &amp;&amp; !root.JS_MD5_NO_BUFFER_FROM) {
      bufferFrom = Buffer.from;
    } else {
      bufferFrom = function (message) {
        return new Buffer(message);
      };
    }
    var nodeMethod = function (message) {
      if (typeof message === 'string') {
        return crypto.createHash('md5').update(message, 'utf8').digest('hex');
      } else {
        if (message === null || message === undefined) {
          throw new Error(INPUT_ERROR);
        } else if (message.constructor === ArrayBuffer) {
          message = new Uint8Array(message);
        }
      }
      if (isArray(message) || isView(message) ||
        message.constructor === Buffer) {
        return crypto.createHash('md5').update(bufferFrom(message)).digest('hex');
      } else {
        return method(message);
      }
    };
    return nodeMethod;
  };

  /**
   * @namespace md5.hmac
   */
  /**
   * @method hex
   * @memberof md5.hmac
   * @description Output hash as hex string
   * @param {String|Array|Uint8Array|ArrayBuffer} key key
   * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
   * @returns {String} Hex string
   * @example
   * md5.hmac.hex('key', 'The quick brown fox jumps over the lazy dog');
   * // equal to
   * md5.hmac('key', 'The quick brown fox jumps over the lazy dog');
   */

  /**
   * @method digest
   * @memberof md5.hmac
   * @description Output hash as bytes array
   * @param {String|Array|Uint8Array|ArrayBuffer} key key
   * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
   * @returns {Array} Bytes array
   * @example
   * md5.hmac.digest('key', 'The quick brown fox jumps over the lazy dog');
   */
  /**
   * @method array
   * @memberof md5.hmac
   * @description Output hash as bytes array
   * @param {String|Array|Uint8Array|ArrayBuffer} key key
   * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
   * @returns {Array} Bytes array
   * @example
   * md5.hmac.array('key', 'The quick brown fox jumps over the lazy dog');
   */
  /**
   * @method arrayBuffer
   * @memberof md5.hmac
   * @description Output hash as ArrayBuffer
   * @param {String|Array|Uint8Array|ArrayBuffer} key key
   * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
   * @returns {ArrayBuffer} ArrayBuffer
   * @example
   * md5.hmac.arrayBuffer('key', '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.hmac
   * @description Output hash as ArrayBuffer
   * @param {String|Array|Uint8Array|ArrayBuffer} key key
   * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
   * @returns {ArrayBuffer} ArrayBuffer
   * @example
   * md5.hmac.buffer('key', 'The quick brown fox jumps over the lazy dog');
   */
  /**
   * @method base64
   * @memberof md5.hmac
   * @description Output hash as base64 string
   * @param {String|Array|Uint8Array|ArrayBuffer} key key
   * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
   * @returns {String} base64 string
   * @example
   * md5.hmac.base64('key', 'The quick brown fox jumps over the lazy dog');
   */
  var createHmacOutputMethod = function (outputType) {
    return function (key, message) {
      return new HmacMd5(key, true).update(message)[outputType]();
    };
  };

  /**
   * @method create
   * @memberof md5.hmac
   * @description Create HmacMd5 object
   * @param {String|Array|Uint8Array|ArrayBuffer} key key
   * @returns {HmacMd5} HmacMd5 object.
   * @example
   * var hash = md5.hmac.create('key');
   */
  /**
   * @method update
   * @memberof md5.hmac
   * @description Create and update HmacMd5 object
   * @param {String|Array|Uint8Array|ArrayBuffer} key key
   * @param {String|Array|Uint8Array|ArrayBuffer} message message to hash
   * @returns {HmacMd5} HmacMd5 object.
   * @example
   * var hash = md5.hmac.update('key', 'The quick brown fox jumps over the lazy dog');
   * // equal to
   * var hash = md5.hmac.create('key');
   * hash.update('The quick brown fox jumps over the lazy dog');
   */
  var createHmacMethod = function () {
    var method = createHmacOutputMethod('hex');
    method.create = function (key) {
      return new HmacMd5(key);
    };
    method.update = function (key, message) {
      return method.create(key).update(message);
    };
    for (var i = 0; i &lt; OUTPUT_TYPES.length; ++i) {
      var type = OUTPUT_TYPES[i];
      method[type] = createHmacOutputMethod(type);
    }
    return method;
  };

  /**
   * 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) {
      throw new Error(FINALIZE_ERROR);
    }

    var result = formatMessage(message);
    message = result[0];
    var isString = result[1];
    var code, index = 0, i, length = message.length, blocks = this.blocks;
    var buffer8 = this.buffer8;

    while (index &lt; 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 (isString) {
        if (ARRAY_BUFFER) {
          for (i = this.start; index &lt; length &amp;&amp; i &lt; 64; ++index) {
            code = message.charCodeAt(index);
            if (code &lt; 0x80) {
              buffer8[i++] = code;
            } else if (code &lt; 0x800) {
              buffer8[i++] = 0xc0 | (code >>> 6);
              buffer8[i++] = 0x80 | (code &amp; 0x3f);
            } else if (code &lt; 0xd800 || code >= 0xe000) {
              buffer8[i++] = 0xe0 | (code >>> 12);
              buffer8[i++] = 0x80 | ((code >>> 6) &amp; 0x3f);
              buffer8[i++] = 0x80 | (code &amp; 0x3f);
            } else {
              code = 0x10000 + (((code &amp; 0x3ff) &lt;&lt; 10) | (message.charCodeAt(++index) &amp; 0x3ff));
              buffer8[i++] = 0xf0 | (code >>> 18);
              buffer8[i++] = 0x80 | ((code >>> 12) &amp; 0x3f);
              buffer8[i++] = 0x80 | ((code >>> 6) &amp; 0x3f);
              buffer8[i++] = 0x80 | (code &amp; 0x3f);
            }
          }
        } else {
          for (i = this.start; index &lt; length &amp;&amp; i &lt; 64; ++index) {
            code = message.charCodeAt(index);
            if (code &lt; 0x80) {
              blocks[i >>> 2] |= code &lt;&lt; SHIFT[i++ &amp; 3];
            } else if (code &lt; 0x800) {
              blocks[i >>> 2] |= (0xc0 | (code >>> 6)) &lt;&lt; SHIFT[i++ &amp; 3];
              blocks[i >>> 2] |= (0x80 | (code &amp; 0x3f)) &lt;&lt; SHIFT[i++ &amp; 3];
            } else if (code &lt; 0xd800 || code >= 0xe000) {
              blocks[i >>> 2] |= (0xe0 | (code >>> 12)) &lt;&lt; SHIFT[i++ &amp; 3];
              blocks[i >>> 2] |= (0x80 | ((code >>> 6) &amp; 0x3f)) &lt;&lt; SHIFT[i++ &amp; 3];
              blocks[i >>> 2] |= (0x80 | (code &amp; 0x3f)) &lt;&lt; SHIFT[i++ &amp; 3];
            } else {
              code = 0x10000 + (((code &amp; 0x3ff) &lt;&lt; 10) | (message.charCodeAt(++index) &amp; 0x3ff));
              blocks[i >>> 2] |= (0xf0 | (code >>> 18)) &lt;&lt; SHIFT[i++ &amp; 3];
              blocks[i >>> 2] |= (0x80 | ((code >>> 12) &amp; 0x3f)) &lt;&lt; SHIFT[i++ &amp; 3];
              blocks[i >>> 2] |= (0x80 | ((code >>> 6) &amp; 0x3f)) &lt;&lt; SHIFT[i++ &amp; 3];
              blocks[i >>> 2] |= (0x80 | (code &amp; 0x3f)) &lt;&lt; SHIFT[i++ &amp; 3];
            }
          }
        }
      } else {
        if (ARRAY_BUFFER) {
          for (i = this.start; index &lt; length &amp;&amp; i &lt; 64; ++index) {
            buffer8[i++] = message[index];
          }
        } else {
          for (i = this.start; index &lt; length &amp;&amp; i &lt; 64; ++index) {
            blocks[i >>> 2] |= message[index] &lt;&lt; SHIFT[i++ &amp; 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 &lt;&lt; 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 &amp; 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 &lt;&lt; 3;
    blocks[15] = this.hBytes &lt;&lt; 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 &lt;&lt; 7 | a >>> 25) - 271733879 &lt;&lt; 0;
      d = (-1732584194 ^ a &amp; 2004318071) + blocks[1] - 117830708;
      d = (d &lt;&lt; 12 | d >>> 20) + a &lt;&lt; 0;
      c = (-271733879 ^ (d &amp; (a ^ -271733879))) + blocks[2] - 1126478375;
      c = (c &lt;&lt; 17 | c >>> 15) + d &lt;&lt; 0;
      b = (a ^ (c &amp; (d ^ a))) + blocks[3] - 1316259209;
      b = (b &lt;&lt; 22 | b >>> 10) + c &lt;&lt; 0;
    } else {
      a = this.h0;
      b = this.h1;
      c = this.h2;
      d = this.h3;
      a += (d ^ (b &amp; (c ^ d))) + blocks[0] - 680876936;
      a = (a &lt;&lt; 7 | a >>> 25) + b &lt;&lt; 0;
      d += (c ^ (a &amp; (b ^ c))) + blocks[1] - 389564586;
      d = (d &lt;&lt; 12 | d >>> 20) + a &lt;&lt; 0;
      c += (b ^ (d &amp; (a ^ b))) + blocks[2] + 606105819;
      c = (c &lt;&lt; 17 | c >>> 15) + d &lt;&lt; 0;
      b += (a ^ (c &amp; (d ^ a))) + blocks[3] - 1044525330;
      b = (b &lt;&lt; 22 | b >>> 10) + c &lt;&lt; 0;
    }

    a += (d ^ (b &amp; (c ^ d))) + blocks[4] - 176418897;
    a = (a &lt;&lt; 7 | a >>> 25) + b &lt;&lt; 0;
    d += (c ^ (a &amp; (b ^ c))) + blocks[5] + 1200080426;
    d = (d &lt;&lt; 12 | d >>> 20) + a &lt;&lt; 0;
    c += (b ^ (d &amp; (a ^ b))) + blocks[6] - 1473231341;
    c = (c &lt;&lt; 17 | c >>> 15) + d &lt;&lt; 0;
    b += (a ^ (c &amp; (d ^ a))) + blocks[7] - 45705983;
    b = (b &lt;&lt; 22 | b >>> 10) + c &lt;&lt; 0;
    a += (d ^ (b &amp; (c ^ d))) + blocks[8] + 1770035416;
    a = (a &lt;&lt; 7 | a >>> 25) + b &lt;&lt; 0;
    d += (c ^ (a &amp; (b ^ c))) + blocks[9] - 1958414417;
    d = (d &lt;&lt; 12 | d >>> 20) + a &lt;&lt; 0;
    c += (b ^ (d &amp; (a ^ b))) + blocks[10] - 42063;
    c = (c &lt;&lt; 17 | c >>> 15) + d &lt;&lt; 0;
    b += (a ^ (c &amp; (d ^ a))) + blocks[11] - 1990404162;
    b = (b &lt;&lt; 22 | b >>> 10) + c &lt;&lt; 0;
    a += (d ^ (b &amp; (c ^ d))) + blocks[12] + 1804603682;
    a = (a &lt;&lt; 7 | a >>> 25) + b &lt;&lt; 0;
    d += (c ^ (a &amp; (b ^ c))) + blocks[13] - 40341101;
    d = (d &lt;&lt; 12 | d >>> 20) + a &lt;&lt; 0;
    c += (b ^ (d &amp; (a ^ b))) + blocks[14] - 1502002290;
    c = (c &lt;&lt; 17 | c >>> 15) + d &lt;&lt; 0;
    b += (a ^ (c &amp; (d ^ a))) + blocks[15] + 1236535329;
    b = (b &lt;&lt; 22 | b >>> 10) + c &lt;&lt; 0;
    a += (c ^ (d &amp; (b ^ c))) + blocks[1] - 165796510;
    a = (a &lt;&lt; 5 | a >>> 27) + b &lt;&lt; 0;
    d += (b ^ (c &amp; (a ^ b))) + blocks[6] - 1069501632;
    d = (d &lt;&lt; 9 | d >>> 23) + a &lt;&lt; 0;
    c += (a ^ (b &amp; (d ^ a))) + blocks[11] + 643717713;
    c = (c &lt;&lt; 14 | c >>> 18) + d &lt;&lt; 0;
    b += (d ^ (a &amp; (c ^ d))) + blocks[0] - 373897302;
    b = (b &lt;&lt; 20 | b >>> 12) + c &lt;&lt; 0;
    a += (c ^ (d &amp; (b ^ c))) + blocks[5] - 701558691;
    a = (a &lt;&lt; 5 | a >>> 27) + b &lt;&lt; 0;
    d += (b ^ (c &amp; (a ^ b))) + blocks[10] + 38016083;
    d = (d &lt;&lt; 9 | d >>> 23) + a &lt;&lt; 0;
    c += (a ^ (b &amp; (d ^ a))) + blocks[15] - 660478335;
    c = (c &lt;&lt; 14 | c >>> 18) + d &lt;&lt; 0;
    b += (d ^ (a &amp; (c ^ d))) + blocks[4] - 405537848;
    b = (b &lt;&lt; 20 | b >>> 12) + c &lt;&lt; 0;
    a += (c ^ (d &amp; (b ^ c))) + blocks[9] + 568446438;
    a = (a &lt;&lt; 5 | a >>> 27) + b &lt;&lt; 0;
    d += (b ^ (c &amp; (a ^ b))) + blocks[14] - 1019803690;
    d = (d &lt;&lt; 9 | d >>> 23) + a &lt;&lt; 0;
    c += (a ^ (b &amp; (d ^ a))) + blocks[3] - 187363961;
    c = (c &lt;&lt; 14 | c >>> 18) + d &lt;&lt; 0;
    b += (d ^ (a &amp; (c ^ d))) + blocks[8] + 1163531501;
    b = (b &lt;&lt; 20 | b >>> 12) + c &lt;&lt; 0;
    a += (c ^ (d &amp; (b ^ c))) + blocks[13] - 1444681467;
    a = (a &lt;&lt; 5 | a >>> 27) + b &lt;&lt; 0;
    d += (b ^ (c &amp; (a ^ b))) + blocks[2] - 51403784;
    d = (d &lt;&lt; 9 | d >>> 23) + a &lt;&lt; 0;
    c += (a ^ (b &amp; (d ^ a))) + blocks[7] + 1735328473;
    c = (c &lt;&lt; 14 | c >>> 18) + d &lt;&lt; 0;
    b += (d ^ (a &amp; (c ^ d))) + blocks[12] - 1926607734;
    b = (b &lt;&lt; 20 | b >>> 12) + c &lt;&lt; 0;
    bc = b ^ c;
    a += (bc ^ d) + blocks[5] - 378558;
    a = (a &lt;&lt; 4 | a >>> 28) + b &lt;&lt; 0;
    d += (bc ^ a) + blocks[8] - 2022574463;
    d = (d &lt;&lt; 11 | d >>> 21) + a &lt;&lt; 0;
    da = d ^ a;
    c += (da ^ b) + blocks[11] + 1839030562;
    c = (c &lt;&lt; 16 | c >>> 16) + d &lt;&lt; 0;
    b += (da ^ c) + blocks[14] - 35309556;
    b = (b &lt;&lt; 23 | b >>> 9) + c &lt;&lt; 0;
    bc = b ^ c;
    a += (bc ^ d) + blocks[1] - 1530992060;
    a = (a &lt;&lt; 4 | a >>> 28) + b &lt;&lt; 0;
    d += (bc ^ a) + blocks[4] + 1272893353;
    d = (d &lt;&lt; 11 | d >>> 21) + a &lt;&lt; 0;
    da = d ^ a;
    c += (da ^ b) + blocks[7] - 155497632;
    c = (c &lt;&lt; 16 | c >>> 16) + d &lt;&lt; 0;
    b += (da ^ c) + blocks[10] - 1094730640;
    b = (b &lt;&lt; 23 | b >>> 9) + c &lt;&lt; 0;
    bc = b ^ c;
    a += (bc ^ d) + blocks[13] + 681279174;
    a = (a &lt;&lt; 4 | a >>> 28) + b &lt;&lt; 0;
    d += (bc ^ a) + blocks[0] - 358537222;
    d = (d &lt;&lt; 11 | d >>> 21) + a &lt;&lt; 0;
    da = d ^ a;
    c += (da ^ b) + blocks[3] - 722521979;
    c = (c &lt;&lt; 16 | c >>> 16) + d &lt;&lt; 0;
    b += (da ^ c) + blocks[6] + 76029189;
    b = (b &lt;&lt; 23 | b >>> 9) + c &lt;&lt; 0;
    bc = b ^ c;
    a += (bc ^ d) + blocks[9] - 640364487;
    a = (a &lt;&lt; 4 | a >>> 28) + b &lt;&lt; 0;
    d += (bc ^ a) + blocks[12] - 421815835;
    d = (d &lt;&lt; 11 | d >>> 21) + a &lt;&lt; 0;
    da = d ^ a;
    c += (da ^ b) + blocks[15] + 530742520;
    c = (c &lt;&lt; 16 | c >>> 16) + d &lt;&lt; 0;
    b += (da ^ c) + blocks[2] - 995338651;
    b = (b &lt;&lt; 23 | b >>> 9) + c &lt;&lt; 0;
    a += (c ^ (b | ~d)) + blocks[0] - 198630844;
    a = (a &lt;&lt; 6 | a >>> 26) + b &lt;&lt; 0;
    d += (b ^ (a | ~c)) + blocks[7] + 1126891415;
    d = (d &lt;&lt; 10 | d >>> 22) + a &lt;&lt; 0;
    c += (a ^ (d | ~b)) + blocks[14] - 1416354905;
    c = (c &lt;&lt; 15 | c >>> 17) + d &lt;&lt; 0;
    b += (d ^ (c | ~a)) + blocks[5] - 57434055;
    b = (b &lt;&lt; 21 | b >>> 11) + c &lt;&lt; 0;
    a += (c ^ (b | ~d)) + blocks[12] + 1700485571;
    a = (a &lt;&lt; 6 | a >>> 26) + b &lt;&lt; 0;
    d += (b ^ (a | ~c)) + blocks[3] - 1894986606;
    d = (d &lt;&lt; 10 | d >>> 22) + a &lt;&lt; 0;
    c += (a ^ (d | ~b)) + blocks[10] - 1051523;
    c = (c &lt;&lt; 15 | c >>> 17) + d &lt;&lt; 0;
    b += (d ^ (c | ~a)) + blocks[1] - 2054922799;
    b = (b &lt;&lt; 21 | b >>> 11) + c &lt;&lt; 0;
    a += (c ^ (b | ~d)) + blocks[8] + 1873313359;
    a = (a &lt;&lt; 6 | a >>> 26) + b &lt;&lt; 0;
    d += (b ^ (a | ~c)) + blocks[15] - 30611744;
    d = (d &lt;&lt; 10 | d >>> 22) + a &lt;&lt; 0;
    c += (a ^ (d | ~b)) + blocks[6] - 1560198380;
    c = (c &lt;&lt; 15 | c >>> 17) + d &lt;&lt; 0;
    b += (d ^ (c | ~a)) + blocks[13] + 1309151649;
    b = (b &lt;&lt; 21 | b >>> 11) + c &lt;&lt; 0;
    a += (c ^ (b | ~d)) + blocks[4] - 145523070;
    a = (a &lt;&lt; 6 | a >>> 26) + b &lt;&lt; 0;
    d += (b ^ (a | ~c)) + blocks[11] - 1120210379;
    d = (d &lt;&lt; 10 | d >>> 22) + a &lt;&lt; 0;
    c += (a ^ (d | ~b)) + blocks[2] + 718787259;
    c = (c &lt;&lt; 15 | c >>> 17) + d &lt;&lt; 0;
    b += (d ^ (c | ~a)) + blocks[9] - 343485551;
    b = (b &lt;&lt; 21 | b >>> 11) + c &lt;&lt; 0;

    if (this.first) {
      this.h0 = a + 1732584193 &lt;&lt; 0;
      this.h1 = b - 271733879 &lt;&lt; 0;
      this.h2 = c - 1732584194 &lt;&lt; 0;
      this.h3 = d + 271733878 &lt;&lt; 0;
      this.first = false;
    } else {
      this.h0 = this.h0 + a &lt;&lt; 0;
      this.h1 = this.h1 + b &lt;&lt; 0;
      this.h2 = this.h2 + c &lt;&lt; 0;
      this.h3 = this.h3 + d &lt;&lt; 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) &amp; 0x0F] + HEX_CHARS[h0 &amp; 0x0F] +
      HEX_CHARS[(h0 >>> 12) &amp; 0x0F] + HEX_CHARS[(h0 >>> 8) &amp; 0x0F] +
      HEX_CHARS[(h0 >>> 20) &amp; 0x0F] + HEX_CHARS[(h0 >>> 16) &amp; 0x0F] +
      HEX_CHARS[(h0 >>> 28) &amp; 0x0F] + HEX_CHARS[(h0 >>> 24) &amp; 0x0F] +
      HEX_CHARS[(h1 >>> 4) &amp; 0x0F] + HEX_CHARS[h1 &amp; 0x0F] +
      HEX_CHARS[(h1 >>> 12) &amp; 0x0F] + HEX_CHARS[(h1 >>> 8) &amp; 0x0F] +
      HEX_CHARS[(h1 >>> 20) &amp; 0x0F] + HEX_CHARS[(h1 >>> 16) &amp; 0x0F] +
      HEX_CHARS[(h1 >>> 28) &amp; 0x0F] + HEX_CHARS[(h1 >>> 24) &amp; 0x0F] +
      HEX_CHARS[(h2 >>> 4) &amp; 0x0F] + HEX_CHARS[h2 &amp; 0x0F] +
      HEX_CHARS[(h2 >>> 12) &amp; 0x0F] + HEX_CHARS[(h2 >>> 8) &amp; 0x0F] +
      HEX_CHARS[(h2 >>> 20) &amp; 0x0F] + HEX_CHARS[(h2 >>> 16) &amp; 0x0F] +
      HEX_CHARS[(h2 >>> 28) &amp; 0x0F] + HEX_CHARS[(h2 >>> 24) &amp; 0x0F] +
      HEX_CHARS[(h3 >>> 4) &amp; 0x0F] + HEX_CHARS[h3 &amp; 0x0F] +
      HEX_CHARS[(h3 >>> 12) &amp; 0x0F] + HEX_CHARS[(h3 >>> 8) &amp; 0x0F] +
      HEX_CHARS[(h3 >>> 20) &amp; 0x0F] + HEX_CHARS[(h3 >>> 16) &amp; 0x0F] +
      HEX_CHARS[(h3 >>> 28) &amp; 0x0F] + HEX_CHARS[(h3 >>> 24) &amp; 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 &amp; 0xFF, (h0 >>> 8) &amp; 0xFF, (h0 >>> 16) &amp; 0xFF, (h0 >>> 24) &amp; 0xFF,
      h1 &amp; 0xFF, (h1 >>> 8) &amp; 0xFF, (h1 >>> 16) &amp; 0xFF, (h1 >>> 24) &amp; 0xFF,
      h2 &amp; 0xFF, (h2 >>> 8) &amp; 0xFF, (h2 >>> 16) &amp; 0xFF, (h2 >>> 24) &amp; 0xFF,
      h3 &amp; 0xFF, (h3 >>> 8) &amp; 0xFF, (h3 >>> 16) &amp; 0xFF, (h3 >>> 24) &amp; 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 &lt; 15;) {
      v1 = bytes[i++];
      v2 = bytes[i++];
      v3 = bytes[i++];
      base64Str += BASE64_ENCODE_CHAR[v1 >>> 2] +
        BASE64_ENCODE_CHAR[(v1 &lt;&lt; 4 | v2 >>> 4) &amp; 63] +
        BASE64_ENCODE_CHAR[(v2 &lt;&lt; 2 | v3 >>> 6) &amp; 63] +
        BASE64_ENCODE_CHAR[v3 &amp; 63];
    }
    v1 = bytes[i];
    base64Str += BASE64_ENCODE_CHAR[v1 >>> 2] +
      BASE64_ENCODE_CHAR[(v1 &lt;&lt; 4) &amp; 63] +
      '==';
    return base64Str;
  };

  /**
   * HmacMd5 class
   * @class HmacMd5
   * @extends Md5
   * @description This is internal class.
   * @see {@link md5.hmac.create}
   */
  function HmacMd5(key, sharedMemory) {
    var i, result = formatMessage(key);
    key = result[0];
    if (result[1]) {
      var bytes = [], length = key.length, index = 0, code;
      for (i = 0; i &lt; length; ++i) {
        code = key.charCodeAt(i);
        if (code &lt; 0x80) {
          bytes[index++] = code;
        } else if (code &lt; 0x800) {
          bytes[index++] = (0xc0 | (code >>> 6));
          bytes[index++] = (0x80 | (code &amp; 0x3f));
        } else if (code &lt; 0xd800 || code >= 0xe000) {
          bytes[index++] = (0xe0 | (code >>> 12));
          bytes[index++] = (0x80 | ((code >>> 6) &amp; 0x3f));
          bytes[index++] = (0x80 | (code &amp; 0x3f));
        } else {
          code = 0x10000 + (((code &amp; 0x3ff) &lt;&lt; 10) | (key.charCodeAt(++i) &amp; 0x3ff));
          bytes[index++] = (0xf0 | (code >>> 18));
          bytes[index++] = (0x80 | ((code >>> 12) &amp; 0x3f));
          bytes[index++] = (0x80 | ((code >>> 6) &amp; 0x3f));
          bytes[index++] = (0x80 | (code &amp; 0x3f));
        }
      }
      key = bytes;
    }

    if (key.length > 64) {
      key = (new Md5(true)).update(key).array();
    }

    var oKeyPad = [], iKeyPad = [];
    for (i = 0; i &lt; 64; ++i) {
      var b = key[i] || 0;
      oKeyPad[i] = 0x5c ^ b;
      iKeyPad[i] = 0x36 ^ b;
    }

    Md5.call(this, sharedMemory);

    this.update(iKeyPad);
    this.oKeyPad = oKeyPad;
    this.inner = true;
    this.sharedMemory = sharedMemory;
  }
  HmacMd5.prototype = new Md5();

  HmacMd5.prototype.finalize = function () {
    Md5.prototype.finalize.call(this);
    if (this.inner) {
      this.inner = false;
      var innerHash = this.array();
      Md5.call(this, this.sharedMemory);
      this.update(this.oKeyPad);
      this.update(innerHash);
      Md5.prototype.finalize.call(this);
    }
  };

  var exports = createMethod();
  exports.md5 = exports;
  exports.md5.hmac = createHmacMethod();

  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;
      });
    }
  }
})();
</code></pre>
        </article>
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