fix(utils): replace getRandomValues with crypto module (#6788)

lib/utils.js

@@ -1,6 +1,7 @@
 'use strict';
 
 import bind from './helpers/bind.js';
+import crypto from 'crypto';
 
 // utils is a library of generic helper functions non-specific to axios
 
@@ -615,8 +616,10 @@ const ALPHABET = {
 const generateString = (size = 16, alphabet = ALPHABET.ALPHA_DIGIT) => {
   let str = '';
   const {length} = alphabet;
-  while (size--) {
-    str += alphabet[Math.random() * length|0]
+  const randomValues = new Uint32Array(size);
+  crypto.randomFillSync(randomValues);
+  for (let i = 0; i < size; i++) {
+    str += alphabet[randomValues[i] % length];
   }
 
   return str;

test/unit/utils/utils.js

@@ -80,4 +80,24 @@ describe('utils', function (){
       assert.strictEqual(JSON.stringify(jsonObject), JSON.stringify({x: 1, y:2, obj: {ok: 1}}))
     });
   });
+
+  describe('generateString', function () {
+    it('should generate a string of the specified length using the default alphabet', function () {
+      const size = 10;
+      const str = utils.generateString(size);
+  
+      assert.strictEqual(str.length, size);
+    });
+  
+    it('should generate a string using only characters from the default alphabet', function () {
+      const size = 10;
+      const alphabet = utils.ALPHABET.ALPHA_DIGIT;
+
+      const str = utils.generateString(size, alphabet);
+  
+      for (let char of str) {
+        assert.ok(alphabet.includes(char), `Character ${char} is not in the alphabet`);
+      }
+    });
+  });
 });