basic navidrome implementation

src/encryption.ts

@@ -0,0 +1,33 @@
+import { createCipheriv, createDecipheriv, randomBytes } from "crypto";
+
+const ALGORITHM = "aes-256-cbc"
+const IV = randomBytes(16);
+const KEY = randomBytes(32);
+
+export type Hash = {
+  iv: string,
+  encryptedData: string
+}
+
+export type Encryption = {
+  encrypt: (value:string) => Hash
+  decrypt: (hash: Hash) => string
+}
+
+const encryption = (): Encryption => {
+  return {
+    encrypt: (value: string) => {
+      const cipher = createCipheriv(ALGORITHM, KEY, IV);
+      return { 
+        iv: IV.toString("hex"), 
+        encryptedData: Buffer.concat([cipher.update(value), cipher.final()]).toString("hex") 
+      };
+    },
+    decrypt: (hash: Hash) => {
+      const decipher = createDecipheriv(ALGORITHM, KEY, Buffer.from(hash.iv, 'hex'));
+      return Buffer.concat([decipher.update(Buffer.from(hash.encryptedData, 'hex')), decipher.final()]).toString();
+    }
+  }
+}
+
+export default encryption;