PHP's md5 in TypeScript

How to use

Install via yarn add locutus and import: import { md5 } from 'locutus/php/strings/md5'.

Or with CommonJS: const { md5 } = require('locutus/php/strings/md5')

Use a bundler that supports tree-shaking so you only ship the functions you actually use. Vite, webpack, Rollup, and Parcel all handle this. For server-side use this is less of a concern.

Examples

These examples are extracted from test cases that automatically verify our functions against their native counterparts.

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

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

Dependencies

This function uses the following Locutus functions:

• utf8_encode (php/xml)

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

TSTypeScript JSJavaScript TSStandalone TS JSStandalone JS

Copy code

import crypto from 'crypto'
import { utf8_encode as utf8Encode } from '../xml/utf8_encode.ts'

export function md5(str: string): string {
  //      discuss at: https://locutus.io/php/md5/
  // parity verified: PHP 8.3
  //     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'

  let hash: string | undefined
  try {
    const md5sum = crypto.createHash('md5')
    md5sum.update(str)
    hash = md5sum.digest('hex')
  } catch (_e) {
    hash = undefined
  }

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

  let xl = 0

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

  const _addUnsigned = function (lX: number, lY: number): number {
    const lX8 = lX & 0x80000000
    const lY8 = lY & 0x80000000
    const lX4 = lX & 0x40000000
    const lY4 = lY & 0x40000000
    const 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
    }
  }

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

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

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

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

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

  const _convertToWordArray = function (value: string): number[] {
    let lWordCount = 0
    const lMessageLength = value.length
    const lNumberOfWordsTemp1 = lMessageLength + 8
    const lNumberOfWordsTemp2 = (lNumberOfWordsTemp1 - (lNumberOfWordsTemp1 % 64)) / 64
    const lNumberOfWords = (lNumberOfWordsTemp2 + 1) * 16
    const lWordArray = new Array<number>(lNumberOfWords).fill(0)
    let lBytePosition = 0
    let lByteCount = 0
    while (lByteCount < lMessageLength) {
      lWordCount = (lByteCount - (lByteCount % 4)) / 4
      lBytePosition = (lByteCount % 4) * 8
      lWordArray[lWordCount] = (lWordArray[lWordCount] ?? 0) | (value.charCodeAt(lByteCount) << lBytePosition)
      lByteCount++
    }
    lWordCount = (lByteCount - (lByteCount % 4)) / 4
    lBytePosition = (lByteCount % 4) * 8
    lWordArray[lWordCount] = (lWordArray[lWordCount] ?? 0) | (0x80 << lBytePosition)
    lWordArray[lNumberOfWords - 2] = lMessageLength << 3
    lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29
    return lWordArray
  }

  const _wordToHex = function (lValue: number): string {
    let wordToHexValue = ''
    let wordToHexValueTemp = ''
    let lByte = 0

    for (let 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
  }

  let x: number[] = []
  let k = 0
  let AA = 0
  let BB = 0
  let CC = 0
  let DD = 0
  let a = 0
  let b = 0
  let c = 0
  let d = 0
  const S11 = 7
  const S12 = 12
  const S13 = 17
  const S14 = 22
  const S21 = 5
  const S22 = 9
  const S23 = 14
  const S24 = 20
  const S31 = 4
  const S32 = 11
  const S33 = 16
  const S34 = 23
  const S41 = 6
  const S42 = 10
  const S43 = 15
  const S44 = 21

  str = utf8Encode(str)
  x = _convertToWordArray(str)
  const _X = function (index: number): number {
    return x[index] ?? 0
  }
  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)
  }

  const temp = _wordToHex(a) + _wordToHex(b) + _wordToHex(c) + _wordToHex(d)

  return temp.toLowerCase()
}

import crypto from 'crypto'
import { utf8_encode as utf8Encode } from '../xml/utf8_encode.ts'

export function md5(str) {
  //      discuss at: https://locutus.io/php/md5/
  // parity verified: PHP 8.3
  //     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'

  let hash
  try {
    const md5sum = crypto.createHash('md5')
    md5sum.update(str)
    hash = md5sum.digest('hex')
  } catch (_e) {
    hash = undefined
  }

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

  let xl = 0

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

  const _addUnsigned = function (lX, lY) {
    const lX8 = lX & 0x80000000
    const lY8 = lY & 0x80000000
    const lX4 = lX & 0x40000000
    const lY4 = lY & 0x40000000
    const 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
    }
  }

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

  const _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)
  }

  const _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)
  }

  const _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)
  }

  const _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)
  }

  const _convertToWordArray = function (value) {
    let lWordCount = 0
    const lMessageLength = value.length
    const lNumberOfWordsTemp1 = lMessageLength + 8
    const lNumberOfWordsTemp2 = (lNumberOfWordsTemp1 - (lNumberOfWordsTemp1 % 64)) / 64
    const lNumberOfWords = (lNumberOfWordsTemp2 + 1) * 16
    const lWordArray = new Array(lNumberOfWords).fill(0)
    let lBytePosition = 0
    let lByteCount = 0
    while (lByteCount < lMessageLength) {
      lWordCount = (lByteCount - (lByteCount % 4)) / 4
      lBytePosition = (lByteCount % 4) * 8
      lWordArray[lWordCount] = (lWordArray[lWordCount] ?? 0) | (value.charCodeAt(lByteCount) << lBytePosition)
      lByteCount++
    }
    lWordCount = (lByteCount - (lByteCount % 4)) / 4
    lBytePosition = (lByteCount % 4) * 8
    lWordArray[lWordCount] = (lWordArray[lWordCount] ?? 0) | (0x80 << lBytePosition)
    lWordArray[lNumberOfWords - 2] = lMessageLength << 3
    lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29
    return lWordArray
  }

  const _wordToHex = function (lValue) {
    let wordToHexValue = ''
    let wordToHexValueTemp = ''
    let lByte = 0

    for (let 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
  }

  let x = []
  let k = 0
  let AA = 0
  let BB = 0
  let CC = 0
  let DD = 0
  let a = 0
  let b = 0
  let c = 0
  let d = 0
  const S11 = 7
  const S12 = 12
  const S13 = 17
  const S14 = 22
  const S21 = 5
  const S22 = 9
  const S23 = 14
  const S24 = 20
  const S31 = 4
  const S32 = 11
  const S33 = 16
  const S34 = 23
  const S41 = 6
  const S42 = 10
  const S43 = 15
  const S44 = 21

  str = utf8Encode(str)
  x = _convertToWordArray(str)
  const _X = function (index) {
    return x[index] ?? 0
  }
  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)
  }

  const temp = _wordToHex(a) + _wordToHex(b) + _wordToHex(c) + _wordToHex(d)

  return temp.toLowerCase()
}

// php/xml/utf8_encode (Locutus dependency module)
function utf8_encode(argString) {
  //      discuss at: https://locutus.io/php/utf8_encode/
  // parity verified: PHP 8.3
  //     original by: Webtoolkit.info (https://www.webtoolkit.info/)
  //     improved by: Kevin van Zonneveld (https://kvz.io)
  //     improved by: sowberry
  //     improved by: Jack
  //     improved by: Yves Sucaet
  //     improved by: kirilloid
  //     bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
  //     bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
  //     bugfixed by: Ulrich
  //     bugfixed by: Rafał Kukawski (https://blog.kukawski.pl)
  //     bugfixed by: kirilloid
  //       example 1: utf8_encode('Kevin van Zonneveld')
  //       returns 1: 'Kevin van Zonneveld'

  if (argString === null || typeof argString === 'undefined') {
    return ''
  }

  // .replace(/\r\n/g, "\n").replace(/\r/g, "\n");
  const string = argString + ''
  let utftext = ''
  let start
  let end
  let stringl = 0

  start = end = 0
  stringl = string.length
  for (let n = 0; n < stringl; n++) {
    let c1 = string.charCodeAt(n)
    let enc = null

    if (c1 < 128) {
      end++
    } else if (c1 > 127 && c1 < 2048) {
      enc = String.fromCharCode((c1 >> 6) | 192, (c1 & 63) | 128)
    } else if ((c1 & 0xf800) !== 0xd800) {
      enc = String.fromCharCode((c1 >> 12) | 224, ((c1 >> 6) & 63) | 128, (c1 & 63) | 128)
    } else {
      // surrogate pairs
      if ((c1 & 0xfc00) !== 0xd800) {
        throw new RangeError('Unmatched trail surrogate at ' + n)
      }
      const c2 = string.charCodeAt(++n)
      if ((c2 & 0xfc00) !== 0xdc00) {
        throw new RangeError('Unmatched lead surrogate at ' + (n - 1))
      }
      c1 = ((c1 & 0x3ff) << 10) + (c2 & 0x3ff) + 0x10000
      enc = String.fromCharCode((c1 >> 18) | 240, ((c1 >> 12) & 63) | 128, ((c1 >> 6) & 63) | 128, (c1 & 63) | 128)
    }
    if (enc !== null) {
      if (end > start) {
        utftext += string.slice(start, end)
      }
      utftext += enc
      start = end = n + 1
    }
  }

  if (end > start) {
    utftext += string.slice(start, stringl)
  }

  return utftext
}

// php/strings/md5 (target function module)
const utf8Encode = utf8_encode

function md5(str) {
  //      discuss at: https://locutus.io/php/md5/
  // parity verified: PHP 8.3
  //     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'

  let hash
  try {
    const md5sum = crypto.createHash('md5')
    md5sum.update(str)
    hash = md5sum.digest('hex')
  } catch (_e) {
    hash = undefined
  }

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

  let xl = 0

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

  const _addUnsigned = function (lX, lY) {
    const lX8 = lX & 0x80000000
    const lY8 = lY & 0x80000000
    const lX4 = lX & 0x40000000
    const lY4 = lY & 0x40000000
    const 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
    }
  }

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

  const _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)
  }

  const _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)
  }

  const _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)
  }

  const _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)
  }

  const _convertToWordArray = function (value) {
    let lWordCount = 0
    const lMessageLength = value.length
    const lNumberOfWordsTemp1 = lMessageLength + 8
    const lNumberOfWordsTemp2 = (lNumberOfWordsTemp1 - (lNumberOfWordsTemp1 % 64)) / 64
    const lNumberOfWords = (lNumberOfWordsTemp2 + 1) * 16
    const lWordArray = new Array(lNumberOfWords).fill(0)
    let lBytePosition = 0
    let lByteCount = 0
    while (lByteCount < lMessageLength) {
      lWordCount = (lByteCount - (lByteCount % 4)) / 4
      lBytePosition = (lByteCount % 4) * 8
      lWordArray[lWordCount] = (lWordArray[lWordCount] ?? 0) | (value.charCodeAt(lByteCount) << lBytePosition)
      lByteCount++
    }
    lWordCount = (lByteCount - (lByteCount % 4)) / 4
    lBytePosition = (lByteCount % 4) * 8
    lWordArray[lWordCount] = (lWordArray[lWordCount] ?? 0) | (0x80 << lBytePosition)
    lWordArray[lNumberOfWords - 2] = lMessageLength << 3
    lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29
    return lWordArray
  }

  const _wordToHex = function (lValue) {
    let wordToHexValue = ''
    let wordToHexValueTemp = ''
    let lByte = 0

    for (let 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
  }

  let x = []
  let k = 0
  let AA = 0
  let BB = 0
  let CC = 0
  let DD = 0
  let a = 0
  let b = 0
  let c = 0
  let d = 0
  const S11 = 7
  const S12 = 12
  const S13 = 17
  const S14 = 22
  const S21 = 5
  const S22 = 9
  const S23 = 14
  const S24 = 20
  const S31 = 4
  const S32 = 11
  const S33 = 16
  const S34 = 23
  const S41 = 6
  const S42 = 10
  const S43 = 15
  const S44 = 21

  str = utf8Encode(str)
  x = _convertToWordArray(str)
  const _X = function (index) {
    return x[index] ?? 0
  }
  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)
  }

  const temp = _wordToHex(a) + _wordToHex(b) + _wordToHex(c) + _wordToHex(d)

  return temp.toLowerCase()
}

Improve this function

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