Switch to Rust crypto

We're not really using crypto at the moment, but with it being this easy, we should still make the switch!

Author: robintown

src/@types/global.d.ts

@@ -23,11 +23,6 @@ declare global {
     webkitFullscreenElement: HTMLElement | null;
   }
 
-  interface Window {
-    // TODO: https://gitlab.matrix.org/matrix-org/olm/-/issues/10
-    OLM_OPTIONS: Record<string, string>;
-  }
-
   interface HTMLElement {
     // Safari only supports this prefixed, so tell the type system about it
     webkitRequestFullscreen: () => void;

src/initializer.tsx

@@ -32,8 +32,6 @@ enum LoadState {
 }
 
 class DependencyLoadStates {
-  // TODO: decide where olm should be initialized (see TODO comment below)
-  // olm: LoadState = LoadState.None;
   public config: LoadState = LoadState.None;
   public sentry: LoadState = LoadState.None;
   public openTelemetry: LoadState = LoadState.None;
@@ -128,18 +126,6 @@ export class Initializer {
   private loadStates = new DependencyLoadStates();
 
   private initStep(resolve: (value: void | PromiseLike<void>) => void): void {
-    // TODO: Olm is initialized with the client currently (see `initClient()` and `olm.ts`)
-    // we need to decide if we want to init it here or keep it in initClient
-    // if (this.loadStates.olm === LoadState.None) {
-    //   this.loadStates.olm = LoadState.Loading;
-    //   // TODO: https://gitlab.matrix.org/matrix-org/olm/-/issues/10
-    //   window.OLM_OPTIONS = {};
-    //   Olm.init({ locateFile: () => olmWasmPath }).then(() => {
-    //     this.loadStates.olm = LoadState.Loaded;
-    //     this.initStep(resolve);
-    //   });
-    // }
-
     // config
     if (this.loadStates.config === LoadState.None) {
       this.loadStates.config = LoadState.Loading;

src/olm.ts

@@ -34,7 +34,6 @@ import type { MatrixClient } from "matrix-js-sdk/src/client";
 import type { Room } from "matrix-js-sdk/src/models/room";
 import IndexedDBWorker from "../IndexedDBWorker?worker";
 import { generateUrlSearchParams, getUrlParams } from "../UrlParams";
-import { loadOlm } from "../olm";
 import { Config } from "../config/Config";
 import { E2eeType } from "../e2ee/e2eeType";
 import { EncryptionSystem, saveKeyForRoom } from "../e2ee/sharedKeyManagement";
@@ -97,8 +96,6 @@ export async function initClient(
   clientOptions: ICreateClientOpts,
   restore: boolean,
 ): Promise<MatrixClient> {
-  await loadOlm();
-
   let indexedDB: IDBFactory | undefined;
   try {
     indexedDB = window.indexedDB;
@@ -198,7 +195,7 @@ export async function initClient(
     await client.store.startup();
   }
 
-  await client.initCrypto();
+  await client.initRustCrypto();
   client.setGlobalErrorOnUnknownDevices(false);
   // Once startClient is called, syncs are run asynchronously.
   // Also, sync completion is communicated only via events.