Make generate random string stronger

src/utils/utils.spec.ts

@@ -0,0 +1,14 @@
+import { generateRandomString } from './utils';
+
+describe('Utils', () => {
+  describe('generateRandomString', () => {
+    it('should create string of length 10', () => {
+      const randomString = generateRandomString(10);
+      expect(randomString.length).toBe(10);
+    });
+    it('should create string of the correct length 2', () => {
+      const randomString = generateRandomString(2);
+      expect(randomString.length).toBe(2);
+    });
+  });
+});

src/utils/utils.ts

@@ -1,5 +1,17 @@
+import { webcrypto } from 'crypto';
+const crypto = webcrypto as unknown as Crypto;
+
 export const generateRandomString = (length: number) => {
-  return [...Array(length)].map(() => (~~(Math.random() * 36)).toString(36)).join('');
+  const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+  const charactersLength = characters.length;
+  const randomValues = new Uint32Array(length);
+  const cryptoedValues = crypto.getRandomValues(randomValues);
+
+  return [...cryptoedValues]
+    .map((val) => {
+      return characters.charAt(val % charactersLength);
+    })
+    .join('');
 };
 
 export const getYesterdaysDate = () => new Date(new Date().setDate(new Date().getDate() - 1));