diff --git a/md5.js b/md5.js
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+/*
+ * JavaScript MD5
+ * https://github.com/blueimp/JavaScript-MD5
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ *
+ * Based on
+ * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+ * Digest Algorithm, as defined in RFC 1321.
+ * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for more info.
+ */
+
+/* global define */
+
+/* eslint-disable strict */
+
+;(function($) {
+  'use strict'
+
+  /**
+   * Add integers, wrapping at 2^32.
+   * This uses 16-bit operations internally to work around bugs in interpreters.
+   *
+   * @param {number} x First integer
+   * @param {number} y Second integer
+   * @returns {number} Sum
+   */
+  function safeAdd(x, y) {
+    var lsw = (x & 0xffff) + (y & 0xffff)
+    var msw = (x >> 16) + (y >> 16) + (lsw >> 16)
+    return (msw << 16) | (lsw & 0xffff)
+  }
+
+  /**
+   * Bitwise rotate a 32-bit number to the left.
+   *
+   * @param {number} num 32-bit number
+   * @param {number} cnt Rotation count
+   * @returns {number} Rotated number
+   */
+  function bitRotateLeft(num, cnt) {
+    return (num << cnt) | (num >>> (32 - cnt))
+  }
+
+  /**
+   * Basic operation the algorithm uses.
+   *
+   * @param {number} q q
+   * @param {number} a a
+   * @param {number} b b
+   * @param {number} x x
+   * @param {number} s s
+   * @param {number} t t
+   * @returns {number} Result
+   */
+  function md5cmn(q, a, b, x, s, t) {
+    return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b)
+  }
+  /**
+   * Basic operation the algorithm uses.
+   *
+   * @param {number} a a
+   * @param {number} b b
+   * @param {number} c c
+   * @param {number} d d
+   * @param {number} x x
+   * @param {number} s s
+   * @param {number} t t
+   * @returns {number} Result
+   */
+  function md5ff(a, b, c, d, x, s, t) {
+    return md5cmn((b & c) | (~b & d), a, b, x, s, t)
+  }
+  /**
+   * Basic operation the algorithm uses.
+   *
+   * @param {number} a a
+   * @param {number} b b
+   * @param {number} c c
+   * @param {number} d d
+   * @param {number} x x
+   * @param {number} s s
+   * @param {number} t t
+   * @returns {number} Result
+   */
+  function md5gg(a, b, c, d, x, s, t) {
+    return md5cmn((b & d) | (c & ~d), a, b, x, s, t)
+  }
+  /**
+   * Basic operation the algorithm uses.
+   *
+   * @param {number} a a
+   * @param {number} b b
+   * @param {number} c c
+   * @param {number} d d
+   * @param {number} x x
+   * @param {number} s s
+   * @param {number} t t
+   * @returns {number} Result
+   */
+  function md5hh(a, b, c, d, x, s, t) {
+    return md5cmn(b ^ c ^ d, a, b, x, s, t)
+  }
+  /**
+   * Basic operation the algorithm uses.
+   *
+   * @param {number} a a
+   * @param {number} b b
+   * @param {number} c c
+   * @param {number} d d
+   * @param {number} x x
+   * @param {number} s s
+   * @param {number} t t
+   * @returns {number} Result
+   */
+  function md5ii(a, b, c, d, x, s, t) {
+    return md5cmn(c ^ (b | ~d), a, b, x, s, t)
+  }
+
+  /**
+   * Calculate the MD5 of an array of little-endian words, and a bit length.
+   *
+   * @param {Array} x Array of little-endian words
+   * @param {number} len Bit length
+   * @returns {Array<number>} MD5 Array
+   */
+  function binlMD5(x, len) {
+    /* append padding */
+    x[len >> 5] |= 0x80 << len % 32
+    x[(((len + 64) >>> 9) << 4) + 14] = len
+
+    var i
+    var olda
+    var oldb
+    var oldc
+    var oldd
+    var a = 1732584193
+    var b = -271733879
+    var c = -1732584194
+    var d = 271733878
+
+    for (i = 0; i < x.length; i += 16) {
+      olda = a
+      oldb = b
+      oldc = c
+      oldd = d
+
+      a = md5ff(a, b, c, d, x[i], 7, -680876936)
+      d = md5ff(d, a, b, c, x[i + 1], 12, -389564586)
+      c = md5ff(c, d, a, b, x[i + 2], 17, 606105819)
+      b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330)
+      a = md5ff(a, b, c, d, x[i + 4], 7, -176418897)
+      d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426)
+      c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341)
+      b = md5ff(b, c, d, a, x[i + 7], 22, -45705983)
+      a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416)
+      d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417)
+      c = md5ff(c, d, a, b, x[i + 10], 17, -42063)
+      b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162)
+      a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682)
+      d = md5ff(d, a, b, c, x[i + 13], 12, -40341101)
+      c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290)
+      b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329)
+
+      a = md5gg(a, b, c, d, x[i + 1], 5, -165796510)
+      d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632)
+      c = md5gg(c, d, a, b, x[i + 11], 14, 643717713)
+      b = md5gg(b, c, d, a, x[i], 20, -373897302)
+      a = md5gg(a, b, c, d, x[i + 5], 5, -701558691)
+      d = md5gg(d, a, b, c, x[i + 10], 9, 38016083)
+      c = md5gg(c, d, a, b, x[i + 15], 14, -660478335)
+      b = md5gg(b, c, d, a, x[i + 4], 20, -405537848)
+      a = md5gg(a, b, c, d, x[i + 9], 5, 568446438)
+      d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690)
+      c = md5gg(c, d, a, b, x[i + 3], 14, -187363961)
+      b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501)
+      a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467)
+      d = md5gg(d, a, b, c, x[i + 2], 9, -51403784)
+      c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473)
+      b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734)
+
+      a = md5hh(a, b, c, d, x[i + 5], 4, -378558)
+      d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463)
+      c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562)
+      b = md5hh(b, c, d, a, x[i + 14], 23, -35309556)
+      a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060)
+      d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353)
+      c = md5hh(c, d, a, b, x[i + 7], 16, -155497632)
+      b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640)
+      a = md5hh(a, b, c, d, x[i + 13], 4, 681279174)
+      d = md5hh(d, a, b, c, x[i], 11, -358537222)
+      c = md5hh(c, d, a, b, x[i + 3], 16, -722521979)
+      b = md5hh(b, c, d, a, x[i + 6], 23, 76029189)
+      a = md5hh(a, b, c, d, x[i + 9], 4, -640364487)
+      d = md5hh(d, a, b, c, x[i + 12], 11, -421815835)
+      c = md5hh(c, d, a, b, x[i + 15], 16, 530742520)
+      b = md5hh(b, c, d, a, x[i + 2], 23, -995338651)
+
+      a = md5ii(a, b, c, d, x[i], 6, -198630844)
+      d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415)
+      c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905)
+      b = md5ii(b, c, d, a, x[i + 5], 21, -57434055)
+      a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571)
+      d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606)
+      c = md5ii(c, d, a, b, x[i + 10], 15, -1051523)
+      b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799)
+      a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359)
+      d = md5ii(d, a, b, c, x[i + 15], 10, -30611744)
+      c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380)
+      b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649)
+      a = md5ii(a, b, c, d, x[i + 4], 6, -145523070)
+      d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379)
+      c = md5ii(c, d, a, b, x[i + 2], 15, 718787259)
+      b = md5ii(b, c, d, a, x[i + 9], 21, -343485551)
+
+      a = safeAdd(a, olda)
+      b = safeAdd(b, oldb)
+      c = safeAdd(c, oldc)
+      d = safeAdd(d, oldd)
+    }
+    return [a, b, c, d]
+  }
+
+  /**
+   * Convert an array of little-endian words to a string
+   *
+   * @param {Array<number>} input MD5 Array
+   * @returns {string} MD5 string
+   */
+  function binl2rstr(input) {
+    var i
+    var output = ''
+    var length32 = input.length * 32
+    for (i = 0; i < length32; i += 8) {
+      output += String.fromCharCode((input[i >> 5] >>> i % 32) & 0xff)
+    }
+    return output
+  }
+
+  /**
+   * Convert a raw string to an array of little-endian words
+   * Characters >255 have their high-byte silently ignored.
+   *
+   * @param {string} input Raw input string
+   * @returns {Array<number>} Array of little-endian words
+   */
+  function rstr2binl(input) {
+    var i
+    var output = []
+    output[(input.length >> 2) - 1] = undefined
+    for (i = 0; i < output.length; i += 1) {
+      output[i] = 0
+    }
+    var length8 = input.length * 8
+    for (i = 0; i < length8; i += 8) {
+      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xff) << i % 32
+    }
+    return output
+  }
+
+  /**
+   * Calculate the MD5 of a raw string
+   *
+   * @param {string} s Input string
+   * @returns {string} Raw MD5 string
+   */
+  function rstrMD5(s) {
+    return binl2rstr(binlMD5(rstr2binl(s), s.length * 8))
+  }
+
+  /**
+   * Calculates the HMAC-MD5 of a key and some data (raw strings)
+   *
+   * @param {string} key HMAC key
+   * @param {string} data Raw input string
+   * @returns {string} Raw MD5 string
+   */
+  function rstrHMACMD5(key, data) {
+    var i
+    var bkey = rstr2binl(key)
+    var ipad = []
+    var opad = []
+    var hash
+    ipad[15] = opad[15] = undefined
+    if (bkey.length > 16) {
+      bkey = binlMD5(bkey, key.length * 8)
+    }
+    for (i = 0; i < 16; i += 1) {
+      ipad[i] = bkey[i] ^ 0x36363636
+      opad[i] = bkey[i] ^ 0x5c5c5c5c
+    }
+    hash = binlMD5(ipad.concat(rstr2binl(data)), 512 + data.length * 8)
+    return binl2rstr(binlMD5(opad.concat(hash), 512 + 128))
+  }
+
+  /**
+   * Convert a raw string to a hex string
+   *
+   * @param {string} input Raw input string
+   * @returns {string} Hex encoded string
+   */
+  function rstr2hex(input) {
+    var hexTab = '0123456789abcdef'
+    var output = ''
+    var x
+    var i
+    for (i = 0; i < input.length; i += 1) {
+      x = input.charCodeAt(i)
+      output += hexTab.charAt((x >>> 4) & 0x0f) + hexTab.charAt(x & 0x0f)
+    }
+    return output
+  }
+
+  /**
+   * Encode a string as UTF-8
+   *
+   * @param {string} input Input string
+   * @returns {string} UTF8 string
+   */
+  function str2rstrUTF8(input) {
+    return unescape(encodeURIComponent(input))
+  }
+
+  /**
+   * Encodes input string as raw MD5 string
+   *
+   * @param {string} s Input string
+   * @returns {string} Raw MD5 string
+   */
+  function rawMD5(s) {
+    return rstrMD5(str2rstrUTF8(s))
+  }
+  /**
+   * Encodes input string as Hex encoded string
+   *
+   * @param {string} s Input string
+   * @returns {string} Hex encoded string
+   */
+  function hexMD5(s) {
+    return rstr2hex(rawMD5(s))
+  }
+  /**
+   * Calculates the raw HMAC-MD5 for the given key and data
+   *
+   * @param {string} k HMAC key
+   * @param {string} d Input string
+   * @returns {string} Raw MD5 string
+   */
+  function rawHMACMD5(k, d) {
+    return rstrHMACMD5(str2rstrUTF8(k), str2rstrUTF8(d))
+  }
+  /**
+   * Calculates the Hex encoded HMAC-MD5 for the given key and data
+   *
+   * @param {string} k HMAC key
+   * @param {string} d Input string
+   * @returns {string} Raw MD5 string
+   */
+  function hexHMACMD5(k, d) {
+    return rstr2hex(rawHMACMD5(k, d))
+  }
+
+  /**
+   * Calculates MD5 value for a given string.
+   * If a key is provided, calculates the HMAC-MD5 value.
+   * Returns a Hex encoded string unless the raw argument is given.
+   *
+   * @param {string} string Input string
+   * @param {string} [key] HMAC key
+   * @param {boolean} [raw] Raw output switch
+   * @returns {string} MD5 output
+   */
+  function md5(string, key, raw) {
+    if (!key) {
+      if (!raw) {
+        return hexMD5(string)
+      }
+      return rawMD5(string)
+    }
+    if (!raw) {
+      return hexHMACMD5(key, string)
+    }
+    return rawHMACMD5(key, string)
+  }
+
+  if (typeof define === 'function' && define.amd) {
+    define(function() {
+      return md5
+    })
+  } else if (typeof module === 'object' && module.exports) {
+    module.exports = md5
+  } else {
+    $.md5 = md5
+  }
+})(this)
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