En-/decryption fixed

backend/utils/crypto.js

@@ -1,16 +1,18 @@
 import crypto from 'crypto';
 
-const algorithm = 'aes-256-ctr';
-const secretKey = process.env.SECRET_KEY;
+const algorithm = 'aes-256-ecb'; // Verwende ECB-Modus, der keinen IV benötigt
+const key = crypto.scryptSync(process.env.SECRET_KEY, 'salt', 32); // Der Schlüssel sollte eine Länge von 32 Bytes haben
 
 export const encrypt = (text) => {
-    const cipher = crypto.createCipheriv(algorithm, secretKey, Buffer.alloc(16, 0));
-    const encrypted = Buffer.concat([cipher.update(text), cipher.final()]);
-    return encrypted.toString('hex');
+    const cipher = crypto.createCipheriv(algorithm, key, null); // Kein IV verwendet
+    let encrypted = cipher.update(text, 'utf8', 'hex');
+    encrypted += cipher.final('hex');
+    return encrypted;
 };
 
-export const decrypt = (hash) => {
-    const decipher = crypto.createDecipheriv(algorithm, secretKey, Buffer.alloc(16, 0));
-    const decrpyted = Buffer.concat([decipher.update(Buffer.from(hash, 'hex')), decipher.final()]);
-    return decrpyted.toString();
+export const decrypt = (text) => {
+    const decipher = crypto.createDecipheriv(algorithm, key, null); // Kein IV verwendet
+    let decrypted = decipher.update(text, 'hex', 'utf8');
+    decrypted += decipher.final('utf8');
+    return decrypted;
 };