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only send decrypted events to Verifier in e2ee rooms

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This commit is contained in:
Bruno Windels
2019-11-18 18:30:43 +01:00
parent fbc4bd0c96
commit 180fea8ace
2 changed files with 57 additions and 7 deletions
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45
src/crypto/index.js
View File

@@ -65,6 +65,32 @@ export function isCryptoAvailable() {
return Boolean(global.Olm);
}
/* subscribes to timeline events for SAS verification */
function listenForEvents(client, roomId, listener) {
let isEncrypted = false;
if (roomId) {
isEncrypted = client.isRoomEncrypted(roomId);
}
if (isEncrypted) {
client.on("Event.decrypted", listener);
} else {
client.on("event", listener);
}
let subscribed = true;
return function() {
if (subscribed) {
if (isEncrypted) {
client.off("Event.decrypted", listener);
} else {
client.off("event", listener);
}
subscribed = false;
}
return null;
};
}
const MIN_FORCE_SESSION_INTERVAL_MS = 60 * 60 * 1000;
const KEY_BACKUP_KEYS_PER_REQUEST = 200;
@@ -826,7 +852,9 @@ Crypto.prototype.requestVerificationDM = async function(userId, roomId, methods)
);
// this handler gets removed when the verification finishes
// (see the verify method of crypto/verification/Base.js)
this._baseApis.on("event", verifier.handler);
const subscription =
listenForEvents(this._baseApis, roomId, verifier.handler);
verifier.setEventsSubscription(subscription);
resolve(verifier);
break;
}
@@ -836,14 +864,19 @@ Crypto.prototype.requestVerificationDM = async function(userId, roomId, methods)
}
}
};
this._baseApis.on("event", listener);
let initialResponseSubscription =
listenForEvents(this._baseApis, roomId, listener);
const resolve = (...args) => {
this._baseApis.off("event", listener);
if (initialResponseSubscription) {
initialResponseSubscription = initialResponseSubscription();
}
_resolve(...args);
};
const reject = (...args) => {
this._baseApis.off("event", listener);
if (initialResponseSubscription) {
initialResponseSubscription = initialResponseSubscription();
}
_reject(...args);
};
});
@@ -878,7 +911,9 @@ Crypto.prototype.acceptVerificationDM = function(event, Method) {
verifier.handler = verificationEventHandler(
verifier, event.getSender(), event.getRoomId(), event.getId(),
);
this._baseApis.on("event", verifier.handler);
const subscription = listenForEvents(
this._baseApis, event.getRoomId(), verifier.handler);
verifier.setEventsSubscription(subscription);
return verifier;
};

19
src/crypto/verification/Base.js
View File

@@ -74,6 +74,7 @@ export default class VerificationBase extends EventEmitter {
this._done = false;
this._promise = null;
this._transactionTimeoutTimer = null;
this._eventsSubscription = null;
// At this point, the verification request was received so start the timeout timer.
this._resetTimer();
@@ -222,6 +223,10 @@ export default class VerificationBase extends EventEmitter {
// but no reject function. If cancel is called again, we'd error.
if (this._reject) this._reject(e);
} else {
// unsubscribe from events, this happens in _reject usually but we don't have one here
if (this._eventsSubscription) {
this._eventsSubscription = this._eventsSubscription();
}
// FIXME: this causes an "Uncaught promise" console message
// if nothing ends up chaining this promise.
this._promise = Promise.reject(e);
@@ -246,7 +251,10 @@ export default class VerificationBase extends EventEmitter {
this._done = true;
this._endTimer();
if (this.handler) {
this._baseApis.off("event", this.handler);
// these listeners are attached in Crypto.acceptVerificationDM
if (this._eventsSubscription) {
this._eventsSubscription = this._eventsSubscription();
}
}
resolve(...args);
};
@@ -254,7 +262,10 @@ export default class VerificationBase extends EventEmitter {
this._done = true;
this._endTimer();
if (this.handler) {
this._baseApis.off("event", this.handler);
// these listeners are attached in Crypto.acceptVerificationDM
if (this._eventsSubscription) {
this._eventsSubscription = this._eventsSubscription();
}
}
reject(...args);
};
@@ -295,4 +306,8 @@ export default class VerificationBase extends EventEmitter {
await this._baseApis.setDeviceVerified(userId, deviceId);
}
}
setEventsSubscription(subscription) {
this._eventsSubscription = subscription;
}
}