Encrypt

.env.example

@@ -0,0 +1 @@
+ENCRYPTION_KEY=b5df1f760870a9a150bd25bbe665e0753f481210e4d90eeeacff075e6b51d6c6

jest.config.js

@@ -2,6 +2,7 @@
 module.exports = {
   preset: 'ts-jest',
   testEnvironment: 'node',
+  setupFiles: ["<rootDir>/tests/setup.ts"],
   moduleNameMapper: {
     '^@/(.*)$': '<rootDir>/src/$1',
   },

package.json

@@ -10,6 +10,7 @@
     "test": "jest --passWithNoTests"
   },
   "dependencies": {
+    "cryptr": "^6.3.0",
     "next": "14.1.0",
     "react": "^18",
     "react-dom": "^18",
@@ -21,6 +22,7 @@
     "@types/react": "^18",
     "@types/react-dom": "^18",
     "autoprefixer": "^10.0.1",
+    "dotenv": "^16.3.2",
     "eslint": "^8",
     "eslint-config-next": "14.1.0",
     "jest": "^29.7.0",

src/lib/encryption.ts

@@ -0,0 +1,10 @@
+import Cryptr from 'cryptr';
+const cryptr = new Cryptr(process.env.ENCRYPTION_KEY || '');
+
+export const encrypt = (string: string): string => {
+  return cryptr.encrypt(string);
+};
+
+export const decrypt = (encryptedString: string): string => {
+  return cryptr.decrypt(encryptedString);
+};

tests/lib/encryption.test.ts

@@ -0,0 +1,17 @@
+import { encrypt, decrypt } from '@/lib/encryption';
+
+const strings: {plain: string, encrypted: string | null} = {
+  plain: 'hey',
+  encrypted: null,
+};
+
+describe('Encryption module', () => {
+  it('Must encrypt string', () => {
+    strings.encrypted = encrypt(strings.plain);
+    expect(strings.encrypted).not.toBe(strings.plain);
+  });
+
+  it('Must decrypt string', () => {
+    expect(decrypt(strings.encrypted as string)).toBe(strings.plain);
+  });
+});

tests/setup.ts

@@ -0,0 +1,3 @@
+import dotenv from 'dotenv';
+
+dotenv.config({ path: '.env.example' });