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diff --git a/lib/handlers/peer-to-peer-message-handler.js b/lib/handlers/peer-to-peer-message-handler.js
--- a/lib/handlers/peer-to-peer-message-handler.js
+++ b/lib/handlers/peer-to-peer-message-handler.js
@@ -9,7 +9,8 @@
type PeerToPeerMessage,
} from '../types/tunnelbroker/peer-to-peer-message-types.js';
import { getConfig } from '../utils/config.js';
-import { olmSessionErrors } from '../utils/olm-utils.js';
+import { getContentSigningKey } from '../utils/crypto-utils.js';
+import { hasHigherDeviceID, olmSessionErrors} from '../utils/olm-utils.js';
async function peerToPeerMessageHandler(
message: PeerToPeerMessage,
@@ -19,17 +20,25 @@
if (message.type === peerToPeerMessageTypes.OUTBOUND_SESSION_CREATION) {
const { senderInfo, encryptedData, sessionVersion } = message;
const { userID: senderUserID, deviceID: senderDeviceID } = senderInfo;
+
+ let deviceKeys: ?DeviceOlmInboundKeys = null;
try {
const { keys } = await identityClient.getInboundKeysForUser(senderUserID);
+ deviceKeys = keys[senderDeviceID];
+ } catch (e) {
+ console.log(e.message);
+ }
- const deviceKeys: ?DeviceOlmInboundKeys = keys[senderDeviceID];
- if (!deviceKeys) {
- throw new Error(
- 'No keys for the device that requested creating a session, ' +
- `deviceID: ${senderDeviceID}`,
- );
- }
+ if (!deviceKeys) {
+ console.log(
+ 'Error creating inbound session with device ' +
+ `${senderDeviceID}: No keys for the device, ` +
+ `session version: ${sessionVersion}`,
+ );
+ return;
+ }
+ try {
await olmAPI.initializeCryptoAccount();
const result = await olmAPI.contentInboundSessionCreator(
deviceKeys.identityKeysBlob.primaryIdentityPublicKeys,
@@ -49,10 +58,28 @@
`${senderDeviceID}, session version: ${sessionVersion}`,
);
} else if (e.message?.includes(olmSessionErrors.raceCondition)) {
- console.log(
- 'Race condition while creating session with ' +
- `${senderDeviceID}, session version: ${sessionVersion}`,
- );
+ const currentDeviceID = await getContentSigningKey();
+ if (hasHigherDeviceID(currentDeviceID, senderDeviceID)) {
+ console.log(
+ 'Race condition while creating session with ' +
+ `${senderDeviceID}, session version: ${sessionVersion}, ` +
+ `this device has a higher deviceID and the session will be kept`,
+ );
+ } else {
+ const result = await olmAPI.contentInboundSessionCreator(
+ deviceKeys.identityKeysBlob.primaryIdentityPublicKeys,
+ encryptedData,
+ sessionVersion,
+ true,
+ );
+ console.log(
+ 'Overwrite session with device ' +
+ `${senderDeviceID}: ${result}, ` +
+ `session version: ${sessionVersion}`,
+ );
+ // Resend all not-yet confirmed messages that were encrypted
+ // with overwrite session. Tracked in ENG-6982.
+ }
} else {
console.log(
'Error creating inbound session with device ' +
diff --git a/lib/utils/olm-utils.js b/lib/utils/olm-utils.js
--- a/lib/utils/olm-utils.js
+++ b/lib/utils/olm-utils.js
@@ -125,6 +125,17 @@
alreadyCreated: 'OLM_SESSION_ALREADY_CREATED',
});
+function hasHigherDeviceID(
+ currenDeviceID: string,
+ otherDeviceID: string,
+): boolean {
+ const compareResult = currenDeviceID.localeCompare(otherDeviceID);
+ if (compareResult === 0) {
+ throw new Error('Comparing the same deviceIDs');
+ }
+ return compareResult === 1;
+}
+
export {
retrieveAccountKeysSet,
getAccountPrekeysSet,
@@ -132,5 +143,6 @@
shouldRotatePrekey,
getAccountOneTimeKeys,
retrieveIdentityKeysAndPrekeys,
+ hasHigherDeviceID,
olmSessionErrors,
};

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