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only check to pre-share new megolm session every minute

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This commit is contained in:
Bruno Windels 2020-11-09 16:49:16 +01:00
parent 44a2febce9
commit 9cfb3c8e95
1 changed files with 9 additions and 0 deletions
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9
src/matrix/e2ee/RoomEncryption.js
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@ -20,6 +20,10 @@ import {mergeMap} from "../../utils/mergeMap.js";
import {makeTxnId} from "../common.js"; import {makeTxnId} from "../common.js";
const ENCRYPTED_TYPE = "m.room.encrypted"; const ENCRYPTED_TYPE = "m.room.encrypted";
// how often ensureMessageKeyIsShared can check if it needs to
// create a new outbound session
// note that encrypt could still create a new session
const MIN_PRESHARE_INTERVAL = 60 * 1000; // 1min
function encodeMissingSessionKey(senderKey, sessionId) { function encodeMissingSessionKey(senderKey, sessionId) {
return `${senderKey}|${sessionId}`; return `${senderKey}|${sessionId}`;
@ -55,6 +59,7 @@ export class RoomEncryption {
this._clock = clock; this._clock = clock;
this._disposed = false; this._disposed = false;
this._isFlushingRoomKeyShares = false; this._isFlushingRoomKeyShares = false;
this._lastKeyPreShareTime = null;
} }
async enableSessionBackup(sessionBackup) { async enableSessionBackup(sessionBackup) {
@ -248,6 +253,10 @@ export class RoomEncryption {
/** shares the encryption key for the next message if needed */ /** shares the encryption key for the next message if needed */
async ensureMessageKeyIsShared(hsApi) { async ensureMessageKeyIsShared(hsApi) {
if (this._lastKeyPreShareTime && this._lastKeyPreShareTime.measure() < MIN_PRESHARE_INTERVAL) {
return;
}
this._lastKeyPreShareTime = this._clock.createMeasure();
const roomKeyMessage = await this._megolmEncryption.ensureOutboundSession(this._room.id, this._encryptionParams); const roomKeyMessage = await this._megolmEncryption.ensureOutboundSession(this._room.id, this._encryptionParams);
if (roomKeyMessage) { if (roomKeyMessage) {
await this._deviceTracker.trackRoom(this._room); await this._deviceTracker.trackRoom(this._room);