PHP's md5 in JavaScript

Here’s what our current JavaScript equivalent to PHP's md5 looks like. 

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module.exports = function md5 (str) {
  //  discuss at: https://locutus.io/php/md5/
  // original by: Webtoolkit.info (https://www.webtoolkit.info/)
  // improved by: Michael White (https://getsprink.com)
  // improved by: Jack
  // improved by: Kevin van Zonneveld (https://kvz.io)
  //    input by: Brett Zamir (https://brett-zamir.me)
  // bugfixed by: Kevin van Zonneveld (https://kvz.io)
  //      note 1: Keep in mind that in accordance with PHP, the whole string is buffered and then
  //      note 1: hashed. If available, we'd recommend using Node's native crypto modules directly
  //      note 1: in a steaming fashion for faster and more efficient hashing
  //   example 1: md5('Kevin van Zonneveld')
  //   returns 1: '6e658d4bfcb59cc13f96c14450ac40b9'

  var hash
  try {
    var crypto = require('crypto')
    var md5sum = crypto.createHash('md5')
    md5sum.update(str)
    hash = md5sum.digest('hex')
  } catch (e) {
    hash = undefined
  }

  if (hash !== undefined) {
    return hash
  }

  var utf8Encode = require('../xml/utf8_encode')
  var xl

  var _rotateLeft = function (lValue, iShiftBits) {
    return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits))
  }

  var _addUnsigned = function (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)
    }
  }

  var _F = function (x, y, z) {
    return (x & y) | ((~x) & z)
  }
  var _G = function (x, y, z) {
    return (x & z) | (y & (~z))
  }
  var _H = function (x, y, z) {
    return (x ^ y ^ z)
  }
  var _I = function (x, y, z) {
    return (y ^ (x | (~z)))
  }

  var _FF = function (a, b, c, d, x, s, ac) {
    a = _addUnsigned(a, _addUnsigned(_addUnsigned(_F(b, c, d), x), ac))
    return _addUnsigned(_rotateLeft(a, s), b)
  }

  var _GG = function (a, b, c, d, x, s, ac) {
    a = _addUnsigned(a, _addUnsigned(_addUnsigned(_G(b, c, d), x), ac))
    return _addUnsigned(_rotateLeft(a, s), b)
  }

  var _HH = function (a, b, c, d, x, s, ac) {
    a = _addUnsigned(a, _addUnsigned(_addUnsigned(_H(b, c, d), x), ac))
    return _addUnsigned(_rotateLeft(a, s), b)
  }

  var _II = function (a, b, c, d, x, s, ac) {
    a = _addUnsigned(a, _addUnsigned(_addUnsigned(_I(b, c, d), x), ac))
    return _addUnsigned(_rotateLeft(a, s), b)
  }

  var _convertToWordArray = function (str) {
    var lWordCount
    var lMessageLength = str.length
    var lNumberOfWordsTemp1 = lMessageLength + 8
    var lNumberOfWordsTemp2 = (lNumberOfWordsTemp1 - (lNumberOfWordsTemp1 % 64)) / 64
    var lNumberOfWords = (lNumberOfWordsTemp2 + 1) * 16
    var lWordArray = new 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] |
        (str.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
  }

  var _wordToHex = function (lValue) {
    var wordToHexValue = ''
    var wordToHexValueTemp = ''
    var lByte
    var lCount

    for (lCount = 0; lCount <= 3; lCount++) {
      lByte = (lValue >>> (lCount * 8)) & 255
      wordToHexValueTemp = '0' + lByte.toString(16)
      wordToHexValue = wordToHexValue + wordToHexValueTemp.substr(wordToHexValueTemp.length - 2, 2)
    }
    return wordToHexValue
  }

  var x = []
  var k
  var AA
  var BB
  var CC
  var DD
  var a
  var b
  var c
  var d
  var S11 = 7
  var S12 = 12
  var S13 = 17
  var S14 = 22
  var S21 = 5
  var S22 = 9
  var S23 = 14
  var S24 = 20
  var S31 = 4
  var S32 = 11
  var S33 = 16
  var S34 = 23
  var S41 = 6
  var S42 = 10
  var S43 = 15
  var S44 = 21

  str = utf8Encode(str)
  x = _convertToWordArray(str)
  a = 0x67452301
  b = 0xEFCDAB89
  c = 0x98BADCFE
  d = 0x10325476

  xl = x.length
  for (k = 0; k < xl; 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.toLowerCase()
}
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How to use

You you can install via npm install locutus and require it via require('locutus/php/strings/md5'). You could also require the strings module in full so that you could access strings.md5 instead.

If you intend to target the browser, you can then use a module bundler such as Browserify, webpack or rollup.js.

ES5/ES6

This function targets ES5, but as of Locutus 2.0.2 we also support ES6 functions. Locutus transpiles to ES5 before publishing to npm.

A community effort

Not unlike Wikipedia, Locutus is an ongoing community effort. Our philosophy follows The McDonald’s Theory. This means that we don't consider it to be a bad thing that many of our functions are first iterations, which may still have their fair share of issues. We hope that these flaws will inspire others to come up with better ideas.

This way of working also means that we don't offer any production guarantees, and recommend to use Locutus inspiration and learning purposes only.

Notes

  • Keep in mind that in accordance with PHP, the whole string is buffered and then hashed. If available, we’d recommend using Node’s native crypto modules directly in a steaming fashion for faster and more efficient hashing

Examples

Please note that these examples are distilled from test cases that automatically verify our functions still work correctly. This could explain some quirky ones.

#codeexpected result
1md5('Kevin van Zonneveld')'6e658d4bfcb59cc13f96c14450ac40b9'

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