implement cryptography for FileTransfer

src/Model/Global/fileTransferModel.ts

@@ -2,14 +2,28 @@
 
 import ConnectionModel from "./connectionModel";
 import StorageModel from "./storageModel";
+import { generateRandomToken } from "../Utility/utility";
 
 export default class FileTransferModel {
-    storageModel: StorageModel;
-    connectionModel: ConnectionModel;
+  storageModel: StorageModel;
+  connectionModel: ConnectionModel;
 
-    // init
-    constructor(storageModel: StorageModel, connectionModel: ConnectionModel) {
-        this.storageModel = storageModel;
-        this.connectionModel = connectionModel;
-    }
-}
+  // methods
+  generateTransferData = (): TransferData => {
+    return {
+      channel: generateRandomToken(2),
+      key: generateRandomToken(3),
+    };
+  };
+
+  // init
+  constructor(storageModel: StorageModel, connectionModel: ConnectionModel) {
+    this.storageModel = storageModel;
+    this.connectionModel = connectionModel;
+  }
+}
+
+export interface TransferData {
+  channel: string;
+  key: string;
+}

src/Model/Utility/utility.ts

@@ -4,6 +4,13 @@ export interface Stringifiable {
   toString(): string;
 }
 
+// crypto
+export function generateRandomToken(length: number): string {
+  const array = new Uint8Array(length);
+  crypto.getRandomValues(array);
+  return array.join("");
+}
+
 // date
 export function createTimestamp(): string {
   return new Date().toISOString();

src/index.tsx

@@ -31,6 +31,8 @@ const chatListModel = new ChatListModel(
 );
 const fileTransferModel = new FileTransferModel(storageModel, connectionModel);
 
+console.log(fileTransferModel.generateTransferData());
+
 // upgrade
 new v1Upgrader(settingsModel, connectionModel, chatListModel);