implement in-house md5 hash function (#18647)

* implement in-house md5 hash function

* format

* add lisence information

GitOrigin-RevId: 1416654e8c27ec7a0d6ca632e6ece59c830ef561

services/web/frontend/js/ide/colors/ColorManager.js

@@ -16,7 +16,8 @@
 
 // NOTE: this file is being refactored over to frontend/js/shared/utils/colors.js
 
-import CryptoJS from 'crypto-js/md5'
+import { generateMD5Hash } from './../../shared/utils/md5'
+
 let ColorManager
 
 export default ColorManager = {
@@ -84,7 +85,7 @@ export default ColorManager = {
   },
 
   getHueForId(id) {
-    const hash = CryptoJS(id)
+    const hash = generateMD5Hash(id)
     const hue =
       parseInt(hash.toString().slice(0, 8), 16) %
       (this.TOTAL_HUES - this.OWN_HUE_BLOCKED_SIZE * 2)

services/web/frontend/js/ide/online-users/OnlineUsersManager.js

@@ -15,7 +15,6 @@
  * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
  */
 import ColorManager from '../colors/ColorManager'
-import 'crypto-js/md5'
 
 let OnlineUsersManager
 

services/web/frontend/js/shared/utils/colors.js

@@ -1,4 +1,4 @@
-import md5 from 'crypto-js/md5'
+import { generateMD5Hash } from './md5'
 
 const ANONYMOUS_HUE = 100
 const OWN_HUE = 200 // We will always appear as this color to ourselves
@@ -30,7 +30,7 @@ export function getHueForUserId(userId, currentUserId) {
 }
 
 function getHueForId(id) {
-  const hash = md5(id)
+  const hash = generateMD5Hash(id)
   const hue =
     parseInt(hash.toString().slice(0, 8), 16) %
     (TOTAL_HUES - OWN_HUE_BLOCKED_SIZE * 2)

services/web/frontend/js/shared/utils/md5.js

@@ -0,0 +1,140 @@
+/**
+ * Inspired by https://stackoverflow.com/a/60467595/237917
+ * 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.
+ */
+
+export function generateMD5Hash(inputString) {
+  const hc = '0123456789abcdef'
+  function rh(n) {
+    let j
+    let s = ''
+    for (j = 0; j <= 3; j++)
+      s +=
+        hc.charAt((n >> (j * 8 + 4)) & 0x0f) + hc.charAt((n >> (j * 8)) & 0x0f)
+    return s
+  }
+  function ad(x, y) {
+    const l = (x & 0xffff) + (y & 0xffff)
+    const m = (x >> 16) + (y >> 16) + (l >> 16)
+    return (m << 16) | (l & 0xffff)
+  }
+  function rl(n, c) {
+    return (n << c) | (n >>> (32 - c))
+  }
+  function cm(q, a, b, x, s, t) {
+    return ad(rl(ad(ad(a, q), ad(x, t)), s), b)
+  }
+  function ff(a, b, c, d, x, s, t) {
+    return cm((b & c) | (~b & d), a, b, x, s, t)
+  }
+  function gg(a, b, c, d, x, s, t) {
+    return cm((b & d) | (c & ~d), a, b, x, s, t)
+  }
+  function hh(a, b, c, d, x, s, t) {
+    return cm(b ^ c ^ d, a, b, x, s, t)
+  }
+  function ii(a, b, c, d, x, s, t) {
+    return cm(c ^ (b | ~d), a, b, x, s, t)
+  }
+  function sb(x) {
+    let i
+    const nblk = ((x.length + 8) >> 6) + 1
+    const blks = new Array(nblk * 16)
+    for (i = 0; i < nblk * 16; i++) blks[i] = 0
+    for (i = 0; i < x.length; i++)
+      blks[i >> 2] |= x.charCodeAt(i) << ((i % 4) * 8)
+    blks[i >> 2] |= 0x80 << ((i % 4) * 8)
+    blks[nblk * 16 - 2] = x.length * 8
+    return blks
+  }
+  let i
+  const x = sb('' + inputString)
+  let a = 1732584193
+  let b = -271733879
+  let c = -1732584194
+  let d = 271733878
+  let olda
+  let oldb
+  let oldc
+  let oldd
+  for (i = 0; i < x.length; i += 16) {
+    olda = a
+    oldb = b
+    oldc = c
+    oldd = d
+    a = ff(a, b, c, d, x[i + 0], 7, -680876936)
+    d = ff(d, a, b, c, x[i + 1], 12, -389564586)
+    c = ff(c, d, a, b, x[i + 2], 17, 606105819)
+    b = ff(b, c, d, a, x[i + 3], 22, -1044525330)
+    a = ff(a, b, c, d, x[i + 4], 7, -176418897)
+    d = ff(d, a, b, c, x[i + 5], 12, 1200080426)
+    c = ff(c, d, a, b, x[i + 6], 17, -1473231341)
+    b = ff(b, c, d, a, x[i + 7], 22, -45705983)
+    a = ff(a, b, c, d, x[i + 8], 7, 1770035416)
+    d = ff(d, a, b, c, x[i + 9], 12, -1958414417)
+    c = ff(c, d, a, b, x[i + 10], 17, -42063)
+    b = ff(b, c, d, a, x[i + 11], 22, -1990404162)
+    a = ff(a, b, c, d, x[i + 12], 7, 1804603682)
+    d = ff(d, a, b, c, x[i + 13], 12, -40341101)
+    c = ff(c, d, a, b, x[i + 14], 17, -1502002290)
+    b = ff(b, c, d, a, x[i + 15], 22, 1236535329)
+    a = gg(a, b, c, d, x[i + 1], 5, -165796510)
+    d = gg(d, a, b, c, x[i + 6], 9, -1069501632)
+    c = gg(c, d, a, b, x[i + 11], 14, 643717713)
+    b = gg(b, c, d, a, x[i + 0], 20, -373897302)
+    a = gg(a, b, c, d, x[i + 5], 5, -701558691)
+    d = gg(d, a, b, c, x[i + 10], 9, 38016083)
+    c = gg(c, d, a, b, x[i + 15], 14, -660478335)
+    b = gg(b, c, d, a, x[i + 4], 20, -405537848)
+    a = gg(a, b, c, d, x[i + 9], 5, 568446438)
+    d = gg(d, a, b, c, x[i + 14], 9, -1019803690)
+    c = gg(c, d, a, b, x[i + 3], 14, -187363961)
+    b = gg(b, c, d, a, x[i + 8], 20, 1163531501)
+    a = gg(a, b, c, d, x[i + 13], 5, -1444681467)
+    d = gg(d, a, b, c, x[i + 2], 9, -51403784)
+    c = gg(c, d, a, b, x[i + 7], 14, 1735328473)
+    b = gg(b, c, d, a, x[i + 12], 20, -1926607734)
+    a = hh(a, b, c, d, x[i + 5], 4, -378558)
+    d = hh(d, a, b, c, x[i + 8], 11, -2022574463)
+    c = hh(c, d, a, b, x[i + 11], 16, 1839030562)
+    b = hh(b, c, d, a, x[i + 14], 23, -35309556)
+    a = hh(a, b, c, d, x[i + 1], 4, -1530992060)
+    d = hh(d, a, b, c, x[i + 4], 11, 1272893353)
+    c = hh(c, d, a, b, x[i + 7], 16, -155497632)
+    b = hh(b, c, d, a, x[i + 10], 23, -1094730640)
+    a = hh(a, b, c, d, x[i + 13], 4, 681279174)
+    d = hh(d, a, b, c, x[i + 0], 11, -358537222)
+    c = hh(c, d, a, b, x[i + 3], 16, -722521979)
+    b = hh(b, c, d, a, x[i + 6], 23, 76029189)
+    a = hh(a, b, c, d, x[i + 9], 4, -640364487)
+    d = hh(d, a, b, c, x[i + 12], 11, -421815835)
+    c = hh(c, d, a, b, x[i + 15], 16, 530742520)
+    b = hh(b, c, d, a, x[i + 2], 23, -995338651)
+    a = ii(a, b, c, d, x[i + 0], 6, -198630844)
+    d = ii(d, a, b, c, x[i + 7], 10, 1126891415)
+    c = ii(c, d, a, b, x[i + 14], 15, -1416354905)
+    b = ii(b, c, d, a, x[i + 5], 21, -57434055)
+    a = ii(a, b, c, d, x[i + 12], 6, 1700485571)
+    d = ii(d, a, b, c, x[i + 3], 10, -1894986606)
+    c = ii(c, d, a, b, x[i + 10], 15, -1051523)
+    b = ii(b, c, d, a, x[i + 1], 21, -2054922799)
+    a = ii(a, b, c, d, x[i + 8], 6, 1873313359)
+    d = ii(d, a, b, c, x[i + 15], 10, -30611744)
+    c = ii(c, d, a, b, x[i + 6], 15, -1560198380)
+    b = ii(b, c, d, a, x[i + 13], 21, 1309151649)
+    a = ii(a, b, c, d, x[i + 4], 6, -145523070)
+    d = ii(d, a, b, c, x[i + 11], 10, -1120210379)
+    c = ii(c, d, a, b, x[i + 2], 15, 718787259)
+    b = ii(b, c, d, a, x[i + 9], 21, -343485551)
+    a = ad(a, olda)
+    b = ad(b, oldb)
+    c = ad(c, oldc)
+    d = ad(d, oldd)
+  }
+  return rh(a) + rh(b) + rh(c) + rh(d)
+}

services/web/test/frontend/shared/utils/md5.test.js

@@ -0,0 +1,19 @@
+import { expect } from 'chai'
+
+import { generateMD5Hash } from '../../../../frontend/js/shared/utils/md5'
+
+describe('md5', function () {
+  describe('generateSHA1Hash', function () {
+    it('sample string 1', function () {
+      expect(generateMD5Hash('sample string 1')).to.equal(
+        'b7988250a49c21459260b41d2b435dae'
+      )
+    })
+
+    it('sample string 2', function () {
+      expect(generateMD5Hash('sample string 2')).to.equal(
+        '371b9c84c640a9e121523156aeae4958'
+      )
+    })
+  })
+})