Adding user encryption key

src/helper/random.ts

@@ -0,0 +1,5 @@
+import { randomBytes } from "crypto";
+
+export function randomString(length: number) {
+   return randomBytes(length).toString("base64").slice(0, length);
+} 

src/helper/user_key.ts

@@ -0,0 +1,14 @@
+// import * as crypto from "crypto-js"
+import { IUser } from "../models/user";
+import { IClient } from "../models/client";
+import * as crypto from "crypto"
+
+function sha512(text: string) {
+   let hash = crypto.createHash("sha512")
+   hash.update(text)
+   return hash.digest("base64")
+}
+
+export function getEncryptionKey(user: IUser, client: IClient) {
+   return sha512(sha512(user.encryption_key) + sha512(client._id.toHexString()) + sha512(client.client_id))
+}