Remove all usage of the CryptoJS library

We’re no longer making use of this library (in order to reduce bundle
size, given that modern browsers provide all of the necessary crypto
functionality).

Resolves #1239.

Gruntfile.js

@@ -16,7 +16,6 @@ module.exports = function (grunt) {
     fragments: 'src/platform/web/fragments',
     static: 'build',
     dest: 'build',
-    crypto_js: 'node_modules/crypto-js/src',
     tools_compiler: __dirname + '/node_modules/google-closure-compiler/compiler.jar',
   };
 

package.json

@@ -31,7 +31,6 @@
   },
   "devDependencies": {
     "@ably/vcdiff-decoder": "1.0.4",
-    "@types/crypto-js": "^4.0.1",
     "@types/node": "^18.0.0",
     "@types/request": "^2.48.7",
     "@types/ws": "^8.2.0",
@@ -42,7 +41,6 @@
     "chai": "^4.2.0",
     "copy-webpack-plugin": "^11.0.0",
     "cors": "~2.7",
-    "crypto-js": "ably-forks/crypto-js#crypto-lite",
     "eslint": "^7.13.0",
     "eslint-plugin-jsdoc": "^40.0.0",
     "eslint-plugin-security": "^1.4.0",

test/support/browser_file_list.js

@@ -11,9 +11,6 @@ window.__testFiles__.files = {
   'browser/lib/util/base64.js': true,
   'node_modules/async/lib/async.js': true,
   'node_modules/@ably/vcdiff-decoder/dist/vcdiff-decoder.js': true,
-  'node_modules/crypto-js/build/enc-base64.js': true,
-  'node_modules/crypto-js/build/enc-utf8.js': true,
-  'node_modules/crypto-js/build/core.js': true,
   'test/common/globals/environment.js': true,
   'test/common/globals/named_dependencies.js': true,
   'test/common/modules/client_module.js': true,

test/web_server

@@ -35,15 +35,6 @@ server.get('/', function(req, res) {
 	}
 });
 
-
-/**
- * This is a rather hacky workaround since crypto-js base64 depends on node_modules/crypto-js/build/core but will request the file from the root level of the server.
- * I'm leaving this here for now in lieu of a more elegant solution as the 'real' solution is to improve the way we use dependencies in these tests.
- */
-server.get('/core.js', function (req, res) {
-  res.redirect('/node_modules/crypto-js/build/core.js');
-});
-
 server.use('/node_modules', express.static(__dirname + '/../node_modules'));
 server.use('/test', express.static(__dirname));
 server.use('/browser', express.static(__dirname + '/../src/web'));

webpack.config.js

@@ -79,9 +79,6 @@ const browserConfig = {
       crypto: false,
     },
   },
-  externals: {
-    'crypto-js': true,
-  },
   optimization: {
     minimize: false,
   },