element-web-Github/playwright/e2e/crypto/decryption-failure-messages.spec.ts
David Langley 491f0cd08a
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2024-09-09 13:57:16 +00:00

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TypeScript

/*
Copyright 2024 New Vector Ltd.
Copyright 2022-2024 The Matrix.org Foundation C.I.C.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
import type { EmittedEvents, Preset } from "matrix-js-sdk/src/matrix";
import { expect, test } from "../../element-web-test";
import {
createRoom,
enableKeyBackup,
logIntoElement,
logOutOfElement,
sendMessageInCurrentRoom,
verifySession,
} from "./utils";
import { isDendrite } from "../../plugins/homeserver/dendrite";
test.describe("Cryptography", function () {
test.use({
displayName: "Alice",
botCreateOpts: {
displayName: "Bob",
autoAcceptInvites: false,
},
});
test.describe("decryption failure messages", () => {
test("should handle device-relative historical messages", async ({
homeserver,
page,
app,
credentials,
user,
}) => {
test.setTimeout(60000);
// Start with a logged-in session, without key backup, and send a message.
await createRoom(page, "Test room", true);
await sendMessageInCurrentRoom(page, "test test");
// Log out, discarding the key for the sent message.
await logOutOfElement(page, true);
// Log in again, and see how the message looks.
await logIntoElement(page, homeserver, credentials);
await app.viewRoomByName("Test room");
const lastTile = page.locator(".mx_EventTile").last();
await expect(lastTile).toContainText("Historical messages are not available on this device");
await expect(lastTile.locator(".mx_EventTile_e2eIcon_decryption_failure")).toBeVisible();
// Now, we set up key backup, and then send another message.
const secretStorageKey = await enableKeyBackup(app);
await app.viewRoomByName("Test room");
await sendMessageInCurrentRoom(page, "test2 test2");
// Workaround for https://github.com/element-hq/element-web/issues/27267. It can take up to 10 seconds for
// the key to be backed up.
await page.waitForTimeout(10000);
// Finally, log out again, and back in, skipping verification for now, and see what we see.
await logOutOfElement(page);
await logIntoElement(page, homeserver, credentials);
await page.locator(".mx_AuthPage").getByRole("button", { name: "Skip verification for now" }).click();
await page.locator(".mx_AuthPage").getByRole("button", { name: "I'll verify later" }).click();
await app.viewRoomByName("Test room");
// There should be two historical events in the timeline
const tiles = await page.locator(".mx_EventTile").all();
expect(tiles.length).toBeGreaterThanOrEqual(2);
// look at the last two tiles only
for (const tile of tiles.slice(-2)) {
await expect(tile).toContainText("You need to verify this device for access to historical messages");
await expect(tile.locator(".mx_EventTile_e2eIcon_decryption_failure")).toBeVisible();
}
// Now verify our device (setting up key backup), and check what happens
await verifySession(app, secretStorageKey);
const tilesAfterVerify = (await page.locator(".mx_EventTile").all()).slice(-2);
// The first message still cannot be decrypted, because it was never backed up. It's now a regular UTD though.
await expect(tilesAfterVerify[0]).toContainText("Unable to decrypt message");
await expect(tilesAfterVerify[0].locator(".mx_EventTile_e2eIcon_decryption_failure")).toBeVisible();
// The second message should now be decrypted, with a grey shield
await expect(tilesAfterVerify[1]).toContainText("test2 test2");
await expect(tilesAfterVerify[1].locator(".mx_EventTile_e2eIcon_normal")).toBeVisible();
});
test.describe("non-joined historical messages", () => {
test.skip(isDendrite, "does not yet support membership on events");
test("should display undecryptable non-joined historical messages with a different message", async ({
homeserver,
page,
app,
credentials: aliceCredentials,
user: alice,
bot: bob,
}) => {
// Bob creates an encrypted room and sends a message to it. He then invites Alice
const roomId = await bob.evaluate(
async (client, { alice }) => {
const encryptionStatePromise = new Promise<void>((resolve) => {
client.on("RoomState.events" as EmittedEvents, (event, _state, _lastStateEvent) => {
if (event.getType() === "m.room.encryption") {
resolve();
}
});
});
const { room_id: roomId } = await client.createRoom({
initial_state: [
{
type: "m.room.encryption",
content: {
algorithm: "m.megolm.v1.aes-sha2",
},
},
],
name: "Test room",
preset: "private_chat" as Preset,
});
// wait for m.room.encryption event, so that when we send a
// message, it will be encrypted
await encryptionStatePromise;
await client.sendTextMessage(roomId, "This should be undecryptable");
await client.invite(roomId, alice.userId);
return roomId;
},
{ alice },
);
// Alice accepts the invite
await expect(
page.getByRole("group", { name: "Invites" }).locator(".mx_RoomSublist_tiles").getByRole("treeitem"),
).toHaveCount(1);
await page.getByRole("treeitem", { name: "Test room" }).click();
await page.locator(".mx_RoomView").getByRole("button", { name: "Accept" }).click();
// Bob sends an encrypted event and an undecryptable event
await bob.evaluate(
async (client, { roomId }) => {
await client.sendTextMessage(roomId, "This should be decryptable");
await client.sendEvent(
roomId,
"m.room.encrypted" as any,
{
algorithm: "m.megolm.v1.aes-sha2",
ciphertext: "this+message+will+be+undecryptable",
device_id: client.getDeviceId()!,
sender_key: (await client.getCrypto()!.getOwnDeviceKeys()).ed25519,
session_id: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
} as any,
);
},
{ roomId },
);
// We wait for the event tiles that we expect from the messages that
// Bob sent, in sequence.
await expect(
page.locator(`.mx_EventTile`).getByText("You don't have access to this message"),
).toBeVisible();
await expect(page.locator(`.mx_EventTile`).getByText("This should be decryptable")).toBeVisible();
await expect(page.locator(`.mx_EventTile`).getByText("Unable to decrypt message")).toBeVisible();
// And then we ensure that they are where we expect them to be
// Alice should see these event tiles:
// - first message sent by Bob (undecryptable)
// - Bob invited Alice
// - Alice joined the room
// - second message sent by Bob (decryptable)
// - third message sent by Bob (undecryptable)
const tiles = await page.locator(".mx_EventTile").all();
expect(tiles.length).toBeGreaterThanOrEqual(5);
// The first message from Bob was sent before Alice was in the room, so should
// be different from the standard UTD message
await expect(tiles[tiles.length - 5]).toContainText("You don't have access to this message");
await expect(tiles[tiles.length - 5].locator(".mx_EventTile_e2eIcon_decryption_failure")).toBeVisible();
// The second message from Bob should be decryptable
await expect(tiles[tiles.length - 2]).toContainText("This should be decryptable");
// this tile won't have an e2e icon since we got the key from the sender
// The third message from Bob is undecryptable, but was sent while Alice was
// in the room and is expected to be decryptable, so this should have the
// standard UTD message
await expect(tiles[tiles.length - 1]).toContainText("Unable to decrypt message");
await expect(tiles[tiles.length - 1].locator(".mx_EventTile_e2eIcon_decryption_failure")).toBeVisible();
});
test("should be able to jump to a message sent before our last join event", async ({
homeserver,
page,
app,
credentials: aliceCredentials,
user: alice,
bot: bob,
}) => {
// Bob:
// - creates an encrypted room,
// - invites Alice,
// - sends a message to it,
// - kicks Alice,
// - sends a bunch more events
// - invites Alice again
// In this way, there will be an event that Alice can decrypt,
// followed by a bunch of undecryptable events which Alice shouldn't
// expect to be able to decrypt. The old code would have hidden all
// the events, even the decryptable event (which it wouldn't have
// even tried to fetch, if it was far enough back).
const { roomId, eventId } = await bob.evaluate(
async (client, { alice }) => {
const { room_id: roomId } = await client.createRoom({
initial_state: [
{
type: "m.room.encryption",
content: {
algorithm: "m.megolm.v1.aes-sha2",
},
},
],
name: "Test room",
preset: "private_chat" as Preset,
});
// invite Alice
const inviteAlicePromise = new Promise<void>((resolve) => {
client.on("RoomMember.membership" as EmittedEvents, (_event, member, _oldMembership?) => {
if (member.userId === alice.userId && member.membership === "invite") {
resolve();
}
});
});
await client.invite(roomId, alice.userId);
// wait for the invite to come back so that we encrypt to Alice
await inviteAlicePromise;
// send a message that Alice should be able to decrypt
const { event_id: eventId } = await client.sendTextMessage(
roomId,
"This should be decryptable",
);
// kick Alice
const kickAlicePromise = new Promise<void>((resolve) => {
client.on("RoomMember.membership" as EmittedEvents, (_event, member, _oldMembership?) => {
if (member.userId === alice.userId && member.membership === "leave") {
resolve();
}
});
});
await client.kick(roomId, alice.userId);
await kickAlicePromise;
// send a bunch of messages that Alice won't be able to decrypt
for (let i = 0; i < 20; i++) {
await client.sendTextMessage(roomId, `${i}`);
}
// invite Alice again
await client.invite(roomId, alice.userId);
return { roomId, eventId };
},
{ alice },
);
// Alice accepts the invite
await expect(
page.getByRole("group", { name: "Invites" }).locator(".mx_RoomSublist_tiles").getByRole("treeitem"),
).toHaveCount(1);
await page.getByRole("treeitem", { name: "Test room" }).click();
await page.locator(".mx_RoomView").getByRole("button", { name: "Accept" }).click();
// wait until we're joined and see the timeline
await expect(page.locator(`.mx_EventTile`).getByText("Alice joined the room")).toBeVisible();
// we should be able to jump to the decryptable message that Bob sent
await page.goto(`#/room/${roomId}/${eventId}`);
await expect(page.locator(`.mx_EventTile`).getByText("This should be decryptable")).toBeVisible();
});
});
});
});