Verschlüsselung korrigiert

backend/utils/encryption.js

@@ -0,0 +1,32 @@
+import crypto from 'crypto';
+import dotenv from 'dotenv';
+
+dotenv.config(); // Laden der Umgebungsvariablen
+
+const algorithm = 'aes-256-cbc';
+const secretKey = process.env.SECRET_KEY;
+
+if (!secretKey || secretKey.length !== 32) {
+    throw new Error('SECRET_KEY length must be 32 bytes');
+}
+
+const encrypt = (text, iv) => {
+    const cipher = crypto.createCipheriv(algorithm, Buffer.from(secretKey, 'utf-8'), iv);
+    let encrypted = cipher.update(text);
+    encrypted = Buffer.concat([encrypted, cipher.final()]);
+    return encrypted.toString('hex');
+};
+
+const decrypt = (encryptedText, iv) => {
+    const encryptedBuffer = Buffer.from(encryptedText, 'hex');
+    const decipher = crypto.createDecipheriv(algorithm, Buffer.from(secretKey, 'utf-8'), iv);
+    let decrypted = decipher.update(encryptedBuffer);
+    decrypted = Buffer.concat([decrypted, decipher.final()]);
+    return decrypted.toString();
+};
+
+const generateIv = () => {
+    return crypto.randomBytes(16);
+};
+
+export { encrypt, decrypt, generateIv };