Support sas verification with other users

src/domain/session/SessionViewModel.js

@@ -55,6 +55,24 @@ export class SessionViewModel extends ViewModel {
         })));
         this._setupNavigation();
         this._setupForcedLogoutOnAccessTokenInvalidation();
+        this.addTestCode__REMOVE();
+    }
+
+    async addTestCode__REMOVE() {
+        window.run = (userId) => {
+            return this.logger.run("testRun", async (log) => {
+                const crossSigning = this._client.session.crossSigning.get();
+                const room = this.currentRoomViewModel.room;
+                const sas = crossSigning.startVerification(userId, room, log);
+                sas.on("EmojiGenerated", async (stage) => {
+                    console.log("emoji", stage.emoji);
+                    await new Promise(r => setTimeout(r, 2000));
+                    await stage.setEmojiMatch(true);
+                });
+                console.log("sas", sas);
+                await sas.verify();
+            });
+        }
     }
 
     _setupNavigation() {

src/matrix/verification/CrossSigning.ts

@@ -19,6 +19,7 @@ import {BaseObservableValue, RetainedObservableValue} from "../../observable/val
 import {pkSign} from "./common";
 import {SASVerification} from "./SAS/SASVerification";
 import {ToDeviceChannel} from "./SAS/channel/ToDeviceChannel";
+import {RoomChannel} from "./SAS/channel/RoomChannel";
 import {VerificationEventType} from "./SAS/channel/types";
 import {ObservableMap} from "../../observable/map";
 import {SASRequest} from "./SAS/SASRequest";
@@ -31,6 +32,8 @@ import type {Account} from "../e2ee/Account";
 import type {ILogItem} from "../../logging/types";
 import type {DeviceMessageHandler} from "../DeviceMessageHandler.js";
 import type {SignedValue, DeviceKey} from "../e2ee/common";
+import type {Room} from "../room/Room.js";
+import type {IChannel} from "./SAS/channel/IChannel";
 import type * as OlmNamespace from "@matrix-org/olm";
 
 type Olm = typeof OlmNamespace;
@@ -177,15 +180,20 @@ export class CrossSigning {
         return this._isMasterKeyTrusted;
     }
 
-    startVerification(requestOrUserId: SASRequest, log: ILogItem): SASVerification | undefined;
+    startVerification(requestOrUserId: SASRequest, logOrRoom: ILogItem): SASVerification | undefined;
-    startVerification(requestOrUserId: string, log: ILogItem): SASVerification | undefined;
+    startVerification(requestOrUserId: string, logOrRoom: ILogItem): SASVerification | undefined;
-    startVerification(requestOrUserId: string | SASRequest, log: ILogItem): SASVerification | undefined {
+    startVerification(requestOrUserId: SASRequest, logOrRoom: Room, _log: ILogItem): SASVerification | undefined;
+    startVerification(requestOrUserId: string, logOrRoom: Room, _log: ILogItem): SASVerification | undefined;
+    startVerification(requestOrUserId: string | SASRequest, logOrRoom: Room | ILogItem, _log?: ILogItem): SASVerification | undefined {
         if (this.sasVerificationInProgress && !this.sasVerificationInProgress.finished) {
             return;
         }
         const otherUserId = requestOrUserId instanceof SASRequest ? requestOrUserId.sender : requestOrUserId;
         const startingMessage = requestOrUserId instanceof SASRequest ? requestOrUserId.startingMessage : undefined;
-        const channel = new ToDeviceChannel({
+        const log = _log ?? logOrRoom;
+        let channel: IChannel;
+        if (otherUserId === this.ownUserId) {
+            channel = new ToDeviceChannel({
                 deviceTracker: this.deviceTracker,
                 hsApi: this.hsApi,
                 otherUserId,
@@ -194,6 +202,16 @@ export class CrossSigning {
                 ourUserDeviceId: this.deviceId,
                 log
             }, startingMessage);
+        }
+        else {
+            channel = new RoomChannel({
+                room: logOrRoom,
+                otherUserId,
+                ourUserId: this.ownUserId,
+                ourUserDeviceId: this.deviceId,
+                log,
+            }, startingMessage);
+        }
 
         this.sasVerificationInProgress = new SASVerification({
             olm: this.olm,

src/matrix/verification/SAS/channel/RoomChannel.ts

@@ -27,6 +27,7 @@ import {getRelatedEventId, createReference} from "../../../room/timeline/relatio
 
 type Options = {
     otherUserId: string;
+    ourUserId: string;
     log: ILogItem;
     ourUserDeviceId: string;
     room: Room;
@@ -40,6 +41,7 @@ export class RoomChannel extends Disposables implements IChannel {
     private readonly waitMap: Map<string, Deferred<any>> = new Map();
     private readonly log: ILogItem;
     private readonly room: Room;
+    private readonly ourUserId: string;
     public otherUserDeviceId: string;
     public startMessage: any;
     /**
@@ -56,6 +58,7 @@ export class RoomChannel extends Disposables implements IChannel {
     constructor(options: Options, startingMessage?: any) {
         super();
         this.otherUserId = options.otherUserId;
+        this.ourUserId = options.ourUserId;
         this.ourDeviceId = options.ourUserDeviceId;
         this.log = options.log;
         this.room = options.room;
@@ -143,16 +146,17 @@ export class RoomChannel extends Disposables implements IChannel {
 
     private async handleRoomMessage(entry: EventEntry) {
         const type = entry.content.msgtype ?? entry.eventType;
-        if (!type.startsWith("m.key.verification")) {
+        if (!type.startsWith("m.key.verification") || entry.sender === this.ourUserId) {
             return; 
         }
+        console.log("entry", entry);
         await this.log.wrap("RoomChannel.handleRoomMessage", async (log) => {
             console.log("entry", entry);
             log.log({ l: "entry", entry });
             if (!this.id) {
                 throw new Error("Couldn't find event-id of request message!");
             }
-            if (getRelatedEventId(entry) !== this.id) {
+            if (getRelatedEventId(entry.event) !== this.id) {
                 /**
                  * When a device receives an unknown transaction_id, it should send an appropriate
                  * m.key.verification.cancel message to the other device indicating as such.
@@ -220,9 +224,11 @@ export class RoomChannel extends Disposables implements IChannel {
         return deferred.promise;
     }
 
-    setStartMessage(event) {
+    setStartMessage(entry) {
-        this.startMessage = event;
+        const clone = entry.clone();
-        this._initiatedByUs = event.content.from_device === this.ourDeviceId;
+        clone.content["m.relates_to"] = clone.event.content["m.relates_to"];
+        this.startMessage = clone;
+        this._initiatedByUs = entry.content.from_device === this.ourDeviceId;
     }
 
     get initiatedByUs(): boolean {