Add labs flag to automatically rageshake on decryption errors

src/@types/global.d.ts

@@ -52,6 +52,7 @@ import { RoomScrollStateStore } from "../stores/RoomScrollStateStore";
 import { ConsoleLogger, IndexedDBLogStore } from "../rageshake/rageshake";
 import ActiveWidgetStore from "../stores/ActiveWidgetStore";
 import { Skinner } from "../Skinner";
+import AutoRageshakeStore from "../stores/AutoRageshakeStore";
 
 /* eslint-disable @typescript-eslint/naming-convention */
 
@@ -111,6 +112,7 @@ declare global {
         electron?: Electron;
         mxSendSentryReport: (userText: string, issueUrl: string, error: Error) => Promise<void>;
         mxLoginWithAccessToken: (hsUrl: string, accessToken: string) => Promise<void>;
+        mxAutoRageshakeStore?: AutoRageshakeStore;
     }
 
     interface DesktopCapturerSource {

src/components/structures/MatrixChat.tsx

@@ -44,6 +44,7 @@ import * as Rooms from '../../Rooms';
 import * as Lifecycle from '../../Lifecycle';
 // LifecycleStore is not used but does listen to and dispatch actions
 import '../../stores/LifecycleStore';
+import '../../stores/AutoRageshakeStore';
 import PageType from '../../PageTypes';
 import createRoom, { IOpts } from "../../createRoom";
 import { _t, _td, getCurrentLanguage } from '../../languageHandler';

src/components/views/settings/tabs/user/LabsUserSettingsTab.tsx

@@ -129,6 +129,11 @@ export default class LabsUserSettingsTab extends React.Component<{}, IState> {
                     name="automaticErrorReporting"
                     level={SettingLevel.DEVICE}
                 />,
+                <SettingsFlag
+                    key="automaticDecryptionErrorReporting"
+                    name="automaticDecryptionErrorReporting"
+                    level={SettingLevel.DEVICE}
+                />,
             );
 
             if (this.state.showHiddenReadReceipts) {

src/i18n/strings/en_EN.json

@@ -948,6 +948,7 @@
     "Temporarily show communities instead of Spaces for this session. Support for this will be removed in the near future. This will reload Element.": "Temporarily show communities instead of Spaces for this session. Support for this will be removed in the near future. This will reload Element.",
     "Developer mode": "Developer mode",
     "Automatically send debug logs on any error": "Automatically send debug logs on any error",
+    "Automatically send debug logs on decryption errors": "Automatically send debug logs on decryption errors",
     "Collecting app version information": "Collecting app version information",
     "Collecting logs": "Collecting logs",
     "Uploading logs": "Uploading logs",

src/rageshake/submit-rageshake.ts

@@ -31,7 +31,8 @@ interface IOpts {
     label?: string;
     userText?: string;
     sendLogs?: boolean;
-    progressCallback?: (string) => void;
+    progressCallback?: (s: string) => void;
+    customFields?: Record<string, string>;
 }
 
 async function collectBugReport(opts: IOpts = {}, gzipLogs = true) {
@@ -72,6 +73,12 @@ async function collectBugReport(opts: IOpts = {}, gzipLogs = true) {
     body.append('installed_pwa', installedPWA);
     body.append('touch_input', touchInput);
 
+    if (opts.customFields) {
+        for (const key in opts.customFields) {
+            body.append(key, opts.customFields[key]);
+        }
+    }
+
     if (client) {
         body.append('user_id', client.credentials.userId);
         body.append('device_id', client.deviceId);
@@ -191,9 +198,9 @@ async function collectBugReport(opts: IOpts = {}, gzipLogs = true) {
  *
  * @param {function(string)} opts.progressCallback Callback to call with progress updates
  *
- * @return {Promise} Resolved when the bug report is sent.
+ * @return {Promise<string>} URL returned by the rageshake server
  */
-export default async function sendBugReport(bugReportEndpoint: string, opts: IOpts = {}) {
+export default async function sendBugReport(bugReportEndpoint: string, opts: IOpts = {}): Promise<string> {
     if (!bugReportEndpoint) {
         throw new Error("No bug report endpoint has been set.");
     }
@@ -202,7 +209,7 @@ export default async function sendBugReport(bugReportEndpoint: string, opts: IOp
     const body = await collectBugReport(opts);
 
     progressCallback(_t("Uploading logs"));
-    await submitReport(bugReportEndpoint, body, progressCallback);
+    return await submitReport(bugReportEndpoint, body, progressCallback);
 }
 
 /**
@@ -291,10 +298,11 @@ export async function submitFeedback(
     await submitReport(SdkConfig.get().bug_report_endpoint_url, body, () => {});
 }
 
-function submitReport(endpoint: string, body: FormData, progressCallback: (str: string) => void) {
-    return new Promise<void>((resolve, reject) => {
+function submitReport(endpoint: string, body: FormData, progressCallback: (str: string) => void): Promise<string> {
+    return new Promise<string>((resolve, reject) => {
         const req = new XMLHttpRequest();
         req.open("POST", endpoint);
+        req.responseType = "json";
         req.timeout = 5 * 60 * 1000;
         req.onreadystatechange = function() {
             if (req.readyState === XMLHttpRequest.LOADING) {
@@ -305,7 +313,7 @@ function submitReport(endpoint: string, body: FormData, progressCallback: (str:
                     reject(new Error(`HTTP ${req.status}`));
                     return;
                 }
-                resolve();
+                resolve(req.response.report_url || "");
             }
         };
         req.send(body);

src/settings/Settings.tsx

@@ -880,6 +880,12 @@ export const SETTINGS: {[setting: string]: ISetting} = {
         default: false,
         controller: new ReloadOnChangeController(),
     },
+    "automaticDecryptionErrorReporting": {
+        displayName: _td("Automatically send debug logs on decryption errors"),
+        supportedLevels: LEVELS_DEVICE_ONLY_SETTINGS,
+        default: false,
+        controller: new ReloadOnChangeController(),
+    },
     [UIFeature.RoomHistorySettings]: {
         supportedLevels: LEVELS_UI_FEATURE,
         default: true,

src/stores/AutoRageshakeStore.ts

@@ -0,0 +1,136 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { MatrixEvent } from "matrix-js-sdk/src";
+
+import SdkConfig from '../SdkConfig';
+import sendBugReport from '../rageshake/submit-rageshake';
+import defaultDispatcher from '../dispatcher/dispatcher';
+import { AsyncStoreWithClient } from './AsyncStoreWithClient';
+import { ActionPayload } from '../dispatcher/payloads';
+import SettingsStore from "../settings/SettingsStore";
+
+// Minimum interval of 5 minutes between reports, especially important when we're doing an initial sync with a lot of decryption errors
+const RAGESHAKE_INTERVAL = 5*60*1000;
+// Event type for to-device messages requesting sender auto-rageshakes
+const AUTO_RS_REQUEST = "im.vector.auto_rs_request";
+
+interface IState {
+    reportedSessionIds: Set<string>;
+    lastRageshakeTime: number;
+}
+
+/**
+ * Watches for decryption errors to auto-report if the relevant lab is
+ * enabled, and keeps track of session IDs that have already been
+ * reported.
+ */
+export default class AutoRageshakeStore extends AsyncStoreWithClient<IState> {
+    private static internalInstance = new AutoRageshakeStore();
+
+    private constructor() {
+        super(defaultDispatcher, {
+            reportedSessionIds: new Set<string>(),
+            lastRageshakeTime: 0,
+        });
+        this.onDecryptionAttempt = this.onDecryptionAttempt.bind(this);
+        this.onDeviceMessage = this.onDeviceMessage.bind(this);
+    }
+
+    public static get instance(): AutoRageshakeStore {
+        return AutoRageshakeStore.internalInstance;
+    }
+
+    protected async onAction(payload: ActionPayload) {
+        // we don't actually do anything here
+    }
+
+    protected async onReady() {
+        if (!SettingsStore.getValue("automaticDecryptionErrorReporting")) return;
+
+        if (this.matrixClient) {
+            this.matrixClient.on('Event.decrypted', this.onDecryptionAttempt);
+            this.matrixClient.on('toDeviceEvent', this.onDeviceMessage);
+        }
+    }
+
+    protected async onNotReady() {
+        if (this.matrixClient) {
+            this.matrixClient.removeListener('toDeviceEvent', this.onDeviceMessage);
+            this.matrixClient.removeListener('Event.decrypted', this.onDecryptionAttempt);
+        }
+    }
+
+    private async onDecryptionAttempt(ev: MatrixEvent): Promise<void> {
+        const wireContent = ev.getWireContent();
+        const sessionId = wireContent.session_id;
+        if (ev.isDecryptionFailure() && !this.state.reportedSessionIds.has(sessionId)) {
+            const newReportedSessionIds = new Set(this.state.reportedSessionIds);
+            await this.updateState({ reportedSessionIds: newReportedSessionIds.add(sessionId) });
+
+            const now = new Date().getTime();
+            if (now - this.state.lastRageshakeTime < RAGESHAKE_INTERVAL) { return; }
+
+            await this.updateState({ lastRageshakeTime: now });
+
+            const eventInfo = {
+                "event_id": ev.getId(),
+                "room_id": ev.getRoomId(),
+                "session_id": sessionId,
+                "device_id": wireContent.device_id,
+                "user_id": ev.getSender(),
+                "sender_key": wireContent.sender_key,
+            };
+
+            const rageshakeURL = await sendBugReport(SdkConfig.get().bug_report_endpoint_url, {
+                userText: "Auto-reporting decryption error (recipient)",
+                sendLogs: true,
+                label: "Z-UISI",
+                customFields: { "auto_uisi": JSON.stringify(eventInfo) },
+            });
+
+            const messageContent = {
+                ...eventInfo,
+                "recipient_rageshake": rageshakeURL,
+            };
+            this.matrixClient.sendToDevice(
+                AUTO_RS_REQUEST,
+                { [messageContent.user_id]: { [messageContent.device_id]: messageContent } },
+            );
+        }
+    }
+
+    private async onDeviceMessage(ev: MatrixEvent): Promise<void> {
+        if (ev.getType() !== AUTO_RS_REQUEST) return;
+        const messageContent = ev.getContent();
+        const recipientRageshake = messageContent["recipient_rageshake"] || "";
+        const now = new Date().getTime();
+        if (now - this.state.lastRageshakeTime > RAGESHAKE_INTERVAL) {
+            await this.updateState({ lastRageshakeTime: now });
+            await sendBugReport(SdkConfig.get().bug_report_endpoint_url, {
+                userText: `Auto-reporting decryption error (sender)\nRecipient rageshake: ${recipientRageshake}`,
+                sendLogs: true,
+                label: "Z-UISI",
+                customFields: {
+                    "recipient_rageshake": recipientRageshake,
+                    "auto_uisi": JSON.stringify(messageContent),
+                },
+            });
+        }
+    }
+}
+
+window.mxAutoRageshakeStore = AutoRageshakeStore.instance;