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take history visibility into account in device tracker

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and return added and removed userids to their userIdentity for the given
room, so room encryption can share and discard the keys for them
This commit is contained in:
Bruno Windels 2022-07-22 17:48:26 +02:00
parent 86c0e9e669
commit f6011f3f34
1 changed files with 42 additions and 29 deletions
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71
src/matrix/e2ee/DeviceTracker.js
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@ -15,6 +15,7 @@ limitations under the License.
*/
import {verifyEd25519Signature, SIGNATURE_ALGORITHM} from "./common.js";
import {shouldShareKey} from "./common.js";
const TRACKING_STATUS_OUTDATED = 0;
const TRACKING_STATUS_UPTODATE = 1;
@ -79,13 +80,38 @@ export class DeviceTracker {
}));
}
writeMemberChanges(room, memberChanges, txn) {
return Promise.all(Array.from(memberChanges.values()).map(async memberChange => {
return this._applyMemberChange(memberChange, txn);
/** @return Promise<{added: string[], removed: string[]}> the user ids for who the room was added or removed to the userIdentity,
* and with who a key should be now be shared
**/
async writeMemberChanges(room, memberChanges, historyVisibility, txn) {
const added = [];
const removed = [];
await Promise.all(Array.from(memberChanges.values()).map(async memberChange => {
// keys should now be shared with this member?
// add the room to the userIdentity if so
if (shouldShareKey(memberChange.membership, historyVisibility)) {
if (await this._addRoomToUserIdentity(memberChange.roomId, memberChange.userId, txn)) {
added.push(memberChange.userId);
}
} else if (memberChange.hasLeft) {
// remove room
const {roomId} = memberChange;
// if we left the room, remove room from all user identities in the room
if (memberChange.userId === this._ownUserId) {
const userIds = await txn.roomMembers.getAllUserIds(roomId);
await Promise.all(userIds.map(userId => {
return this._removeRoomFromUserIdentity(roomId, userId, txn);
}));
} else {
await this._removeRoomFromUserIdentity(roomId, memberChange.userId, txn);
}
removed.push(memberChange.userId);
}
}));
return {added, removed};
}
async trackRoom(room, log) {
async trackRoom(room, historyVisibility, log) {
if (room.isTrackingMembers || !room.isEncrypted) {
return;
}
@ -100,7 +126,11 @@ export class DeviceTracker {
isTrackingChanges = room.writeIsTrackingMembers(true, txn);
const members = Array.from(memberList.members.values());
log.set("members", members.length);
await this._writeJoinedMembers(members, txn);
await Promise.all(members.map(async member => {
if (shouldShareKey(member.membership, historyVisibility)) {
await this._addRoomToUserIdentity(member.roomId, member.userId, txn);
}
}));
} catch (err) {
txn.abort();
throw err;
@ -120,13 +150,15 @@ export class DeviceTracker {
}));
}
async _writeMember(member, txn) {
async _addRoomToUserIdentity(roomId, userId, txn) {
const {userIdentities} = txn;
const identity = await userIdentities.get(member.userId);
const updatedIdentity = addRoomToIdentity(identity, member.userId, member.roomId);
const identity = await userIdentities.get(userId);
const updatedIdentity = addRoomToIdentity(identity, userId, roomId);
if (updatedIdentity) {
userIdentities.set(updatedIdentity);
return true;
}
return false;
}
async _removeRoomFromUserIdentity(roomId, userId, txn) {
@ -141,28 +173,9 @@ export class DeviceTracker {
} else {
userIdentities.set(identity);
}
return true;
}
}
async _applyMemberChange(memberChange, txn) {
// TODO: depends whether we encrypt for invited users??
// add room
if (memberChange.hasJoined) {
await this._writeMember(memberChange.member, txn);
}
// remove room
else if (memberChange.hasLeft) {
const {roomId} = memberChange;
// if we left the room, remove room from all user identities in the room
if (memberChange.userId === this._ownUserId) {
const userIds = await txn.roomMembers.getAllUserIds(roomId);
await Promise.all(userIds.map(userId => {
return this._removeRoomFromUserIdentity(roomId, userId, txn);
}));
} else {
await this._removeRoomFromUserIdentity(roomId, memberChange.userId, txn);
}
}
return false;
}
async _queryKeys(userIds, hsApi, log) {