From 72649d2c3a41c8fb3f87b00c13b3e8143e31e80b Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <richard@matrix.org>
Date: Fri, 27 Sep 2024 01:01:02 +0100
Subject: [PATCH] Playwright test for messages from insecure devices

---
 .../e2e/crypto/invisible-crypto.spec.ts       | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 playwright/e2e/crypto/invisible-crypto.spec.ts

diff --git a/playwright/e2e/crypto/invisible-crypto.spec.ts b/playwright/e2e/crypto/invisible-crypto.spec.ts
new file mode 100644
index 0000000000..c53bacd32c
--- /dev/null
+++ b/playwright/e2e/crypto/invisible-crypto.spec.ts
@@ -0,0 +1,56 @@
+/*
+Copyright 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
+Please see LICENSE files in the repository root for full details.
+*/
+
+import { expect, test } from "../../element-web-test";
+import { autoJoin, createSecondBotDevice, createSharedRoomWithUser, verify } from "./utils";
+import { bootstrapCrossSigningForClient } from "../../pages/client.ts";
+
+/** Tests for the "invisible crypto" behaviour -- i.e., when the "exclude insecure devices" setting is enabled */
+test.describe("Invisible cryptography", () => {
+    test.use({
+        displayName: "Alice",
+        botCreateOpts: { displayName: "Bob" },
+        labsFlags: ["feature_exclude_insecure_devices"],
+    });
+
+    test("Messages fail to decrypt when sender is previously verified", async ({
+        page,
+        bot: bob,
+        user: aliceCredentials,
+        app,
+        homeserver,
+    }) => {
+        await app.client.bootstrapCrossSigning(aliceCredentials);
+        await autoJoin(bob);
+
+        // create an encrypted room
+        const testRoomId = await createSharedRoomWithUser(app, bob.credentials.userId, {
+            name: "TestRoom",
+            initial_state: [
+                {
+                    type: "m.room.encryption",
+                    state_key: "",
+                    content: {
+                        algorithm: "m.megolm.v1.aes-sha2",
+                    },
+                },
+            ],
+        });
+
+        // Verify Bob
+        await verify(app, bob);
+
+        // Bob logs in a new device and resets cross-signing
+        const bobSecondDevice = await createSecondBotDevice(page, homeserver, bob);
+        await bootstrapCrossSigningForClient(await bobSecondDevice.prepareClient(), bob.credentials, true);
+
+        /* should show an error for a message from a previously verified device */
+        await bobSecondDevice.sendMessage(testRoomId, "test encrypted from user that was previously verified");
+        const lastTile = page.locator(".mx_EventTile_last");
+        await expect(lastTile).toContainText("Verified identity has changed");
+    });
+});