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convert olm/Encryption to TS

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This commit is contained in:
Bruno Windels 2022-02-16 18:00:13 +01:00
parent eb5ca200f2
commit e3e90ed167
2 changed files with 94 additions and 67 deletions
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20
src/matrix/Session.js
View file

@ -27,7 +27,7 @@ import {DeviceMessageHandler} from "./DeviceMessageHandler.js";
import {Account as E2EEAccount} from "./e2ee/Account.js";
import {uploadAccountAsDehydratedDevice} from "./e2ee/Dehydration.js";
import {Decryption as OlmDecryption} from "./e2ee/olm/Decryption";
import {Encryption as OlmEncryption} from "./e2ee/olm/Encryption.js";
import {Encryption as OlmEncryption} from "./e2ee/olm/Encryption";
import {Decryption as MegOlmDecryption} from "./e2ee/megolm/Decryption";
import {KeyLoader as MegOlmKeyLoader} from "./e2ee/megolm/decryption/KeyLoader";
import {KeyBackup} from "./e2ee/megolm/keybackup/KeyBackup";
@ -132,16 +132,16 @@ export class Session {
this._user.id,
senderKeyLock
);
this._olmEncryption = new OlmEncryption({
account: this._e2eeAccount,
pickleKey: PICKLE_KEY,
olm: this._olm,
storage: this._storage,
now: this._platform.clock.now,
ownUserId: this._user.id,
olmUtil: this._olmUtil,
this._olmEncryption = new OlmEncryption(
this._e2eeAccount,
PICKLE_KEY,
this._olm,
this._storage,
this._platform.clock.now,
this._user.id,
this._olmUtil,
senderKeyLock
});
);
this._keyLoader = new MegOlmKeyLoader(this._olm, PICKLE_KEY, 20);
this._megolmEncryption = new MegOlmEncryption({
account: this._e2eeAccount,

141
src/matrix/e2ee/olm/Encryption.js → src/matrix/e2ee/olm/Encryption.ts
View file

@ -18,6 +18,32 @@ import {groupByWithCreator} from "../../../utils/groupBy";
import {verifyEd25519Signature, OLM_ALGORITHM} from "../common.js";
import {createSessionEntry} from "./Session";
import type {OlmMessage, OlmPayload, OlmEncryptedMessageContent} from "./types";
import type {Account} from "../Account";
import type {LockMap} from "../../../utils/LockMap";
import type {Storage} from "../../storage/idb/Storage";
import type {Transaction} from "../../storage/idb/Transaction";
import type {DeviceIdentity} from "../../storage/idb/stores/DeviceIdentityStore";
import type {HomeServerApi} from "../../net/HomeServerApi";
import type {ILogItem} from "../../../logging/types";
import type * as OlmNamespace from "@matrix-org/olm";
type Olm = typeof OlmNamespace;
type ClaimedOTKResponse = {
[userId: string]: {
[deviceId: string]: {
[algorithmAndOtk: string]: {
key: string,
signatures: {
[userId: string]: {
[algorithmAndDevice: string]: string
}
}
}
}
}
};
function findFirstSessionId(sessionIds) {
return sessionIds.reduce((first, sessionId) => {
if (!first || sessionId < first) {
@ -36,19 +62,19 @@ const OTK_ALGORITHM = "signed_curve25519";
const MAX_BATCH_SIZE = 20;
export class Encryption {
constructor({account, olm, olmUtil, ownUserId, storage, now, pickleKey, senderKeyLock}) {
this._account = account;
this._olm = olm;
this._olmUtil = olmUtil;
this._ownUserId = ownUserId;
this._storage = storage;
this._now = now;
this._pickleKey = pickleKey;
this._senderKeyLock = senderKeyLock;
}
constructor(
private readonly account: Account,
private readonly olm: Olm,
private readonly olmUtil: Olm.Utility,
private readonly ownUserId: string,
private readonly storage: Storage,
private readonly now: () => number,
private readonly pickleKey: string,
private readonly senderKeyLock: LockMap<string>
) {}
async encrypt(type, content, devices, hsApi, log) {
let messages = [];
async encrypt(type: string, content: Record<string, any>, devices: DeviceIdentity[], hsApi: HomeServerApi, log: ILogItem): Promise<EncryptedMessage[]> {
let messages: EncryptedMessage[] = [];
for (let i = 0; i < devices.length ; i += MAX_BATCH_SIZE) {
const batchDevices = devices.slice(i, i + MAX_BATCH_SIZE);
const batchMessages = await this._encryptForMaxDevices(type, content, batchDevices, hsApi, log);
@ -57,12 +83,12 @@ export class Encryption {
return messages;
}
async _encryptForMaxDevices(type, content, devices, hsApi, log) {
async _encryptForMaxDevices(type: string, content: Record<string, any>, devices: DeviceIdentity[], hsApi: HomeServerApi, log: ILogItem): Promise<EncryptedMessage[]> {
// TODO: see if we can only hold some of the locks until after the /keys/claim call (if needed)
// take a lock on all senderKeys so decryption and other calls to encrypt (should not happen)
// don't modify the sessions at the same time
const locks = await Promise.all(devices.map(device => {
return this._senderKeyLock.takeLock(device.curve25519Key);
return this.senderKeyLock.takeLock(device.curve25519Key);
}));
try {
const {
@ -70,9 +96,9 @@ export class Encryption {
existingEncryptionTargets,
} = await this._findExistingSessions(devices);
const timestamp = this._now();
const timestamp = this.now();
let encryptionTargets = [];
let encryptionTargets: EncryptionTarget[] = [];
try {
if (devicesWithoutSession.length) {
const newEncryptionTargets = await log.wrap("create sessions", log => this._createNewSessions(
@ -100,8 +126,8 @@ export class Encryption {
}
}
async _findExistingSessions(devices) {
const txn = await this._storage.readTxn([this._storage.storeNames.olmSessions]);
async _findExistingSessions(devices: DeviceIdentity[]): Promise<{devicesWithoutSession: DeviceIdentity[], existingEncryptionTargets: EncryptionTarget[]}> {
const txn = await this.storage.readTxn([this.storage.storeNames.olmSessions]);
const sessionIdsForDevice = await Promise.all(devices.map(async device => {
return await txn.olmSessions.getSessionIds(device.curve25519Key);
}));
@ -116,18 +142,18 @@ export class Encryption {
const sessionId = findFirstSessionId(sessionIds);
return EncryptionTarget.fromSessionId(device, sessionId);
}
}).filter(target => !!target);
}).filter(target => !!target) as EncryptionTarget[];
return {devicesWithoutSession, existingEncryptionTargets};
}
_encryptForDevice(type, content, target) {
_encryptForDevice(type: string, content: Record<string, any>, target: EncryptionTarget): OlmEncryptedMessageContent {
const {session, device} = target;
const plaintext = JSON.stringify(this._buildPlainTextMessageForDevice(type, content, device));
const message = session.encrypt(plaintext);
const message = session!.encrypt(plaintext);
const encryptedContent = {
algorithm: OLM_ALGORITHM,
sender_key: this._account.identityKeys.curve25519,
sender_key: this.account.identityKeys.curve25519,
ciphertext: {
[device.curve25519Key]: message
}
@ -135,27 +161,27 @@ export class Encryption {
return encryptedContent;
}
_buildPlainTextMessageForDevice(type, content, device) {
_buildPlainTextMessageForDevice(type: string, content: Record<string, any>, device: DeviceIdentity): OlmPayload {
return {
keys: {
"ed25519": this._account.identityKeys.ed25519
"ed25519": this.account.identityKeys.ed25519
},
recipient_keys: {
"ed25519": device.ed25519Key
},
recipient: device.userId,
sender: this._ownUserId,
sender: this.ownUserId,
content,
type
}
}
async _createNewSessions(devicesWithoutSession, hsApi, timestamp, log) {
async _createNewSessions(devicesWithoutSession: DeviceIdentity[], hsApi: HomeServerApi, timestamp: number, log: ILogItem): Promise<EncryptionTarget[]> {
const newEncryptionTargets = await log.wrap("claim", log => this._claimOneTimeKeys(hsApi, devicesWithoutSession, log));
try {
for (const target of newEncryptionTargets) {
const {device, oneTimeKey} = target;
target.session = await this._account.createOutboundOlmSession(device.curve25519Key, oneTimeKey);
target.session = await this.account.createOutboundOlmSession(device.curve25519Key, oneTimeKey);
}
await this._storeSessions(newEncryptionTargets, timestamp);
} catch (err) {
@ -167,12 +193,12 @@ export class Encryption {
return newEncryptionTargets;
}
async _claimOneTimeKeys(hsApi, deviceIdentities, log) {
async _claimOneTimeKeys(hsApi: HomeServerApi, deviceIdentities: DeviceIdentity[], log: ILogItem): Promise<EncryptionTarget[]> {
// create a Map<userId, Map<deviceId, deviceIdentity>>
const devicesByUser = groupByWithCreator(deviceIdentities,
device => device.userId,
() => new Map(),
(deviceMap, device) => deviceMap.set(device.deviceId, device)
(device: DeviceIdentity) => device.userId,
(): Map<string, DeviceIdentity> => new Map(),
(deviceMap: Map<string, DeviceIdentity>, device: DeviceIdentity) => deviceMap.set(device.deviceId, device)
);
const oneTimeKeys = Array.from(devicesByUser.entries()).reduce((usersObj, [userId, deviceMap]) => {
usersObj[userId] = Array.from(deviceMap.values()).reduce((devicesObj, device) => {
@ -188,12 +214,12 @@ export class Encryption {
if (Object.keys(claimResponse.failures).length) {
log.log({l: "failures", servers: Object.keys(claimResponse.failures)}, log.level.Warn);
}
const userKeyMap = claimResponse?.["one_time_keys"];
const userKeyMap = claimResponse?.["one_time_keys"] as ClaimedOTKResponse;
return this._verifyAndCreateOTKTargets(userKeyMap, devicesByUser, log);
}
_verifyAndCreateOTKTargets(userKeyMap, devicesByUser, log) {
const verifiedEncryptionTargets = [];
_verifyAndCreateOTKTargets(userKeyMap: ClaimedOTKResponse, devicesByUser: Map<string, Map<string, DeviceIdentity>>, log: ILogItem): EncryptionTarget[] {
const verifiedEncryptionTargets: EncryptionTarget[] = [];
for (const [userId, userSection] of Object.entries(userKeyMap)) {
for (const [deviceId, deviceSection] of Object.entries(userSection)) {
const [firstPropName, keySection] = Object.entries(deviceSection)[0];
@ -202,7 +228,7 @@ export class Encryption {
const device = devicesByUser.get(userId)?.get(deviceId);
if (device) {
const isValidSignature = verifyEd25519Signature(
this._olmUtil, userId, deviceId, device.ed25519Key, keySection, log);
this.olmUtil, userId, deviceId, device.ed25519Key, keySection, log);
if (isValidSignature) {
const target = EncryptionTarget.fromOTK(device, keySection.key);
verifiedEncryptionTargets.push(target);
@ -214,8 +240,8 @@ export class Encryption {
return verifiedEncryptionTargets;
}
async _loadSessions(encryptionTargets) {
const txn = await this._storage.readTxn([this._storage.storeNames.olmSessions]);
async _loadSessions(encryptionTargets: EncryptionTarget[]): Promise<void> {
const txn = await this.storage.readTxn([this.storage.storeNames.olmSessions]);
// given we run loading in parallel, there might still be some
// storage requests that will finish later once one has failed.
// those should not allocate a session anymore.
@ -223,10 +249,10 @@ export class Encryption {
try {
await Promise.all(encryptionTargets.map(async encryptionTarget => {
const sessionEntry = await txn.olmSessions.get(
encryptionTarget.device.curve25519Key, encryptionTarget.sessionId);
encryptionTarget.device.curve25519Key, encryptionTarget.sessionId!);
if (sessionEntry && !failed) {
const olmSession = new this._olm.Session();
olmSession.unpickle(this._pickleKey, sessionEntry.session);
const olmSession = new this.olm.Session();
olmSession.unpickle(this.pickleKey, sessionEntry.session);
encryptionTarget.session = olmSession;
}
}));
@ -240,12 +266,12 @@ export class Encryption {
}
}
async _storeSessions(encryptionTargets, timestamp) {
const txn = await this._storage.readWriteTxn([this._storage.storeNames.olmSessions]);
async _storeSessions(encryptionTargets: EncryptionTarget[], timestamp: number): Promise<void> {
const txn = await this.storage.readWriteTxn([this.storage.storeNames.olmSessions]);
try {
for (const target of encryptionTargets) {
const sessionEntry = createSessionEntry(
target.session, target.device.curve25519Key, timestamp, this._pickleKey);
target.session!, target.device.curve25519Key, timestamp, this.pickleKey);
txn.olmSessions.set(sessionEntry);
}
} catch (err) {
@ -261,23 +287,24 @@ export class Encryption {
// (and later converted to a session) in case of a new session
// or an existing session
class EncryptionTarget {
constructor(device, oneTimeKey, sessionId) {
this.device = device;
this.oneTimeKey = oneTimeKey;
this.sessionId = sessionId;
// an olmSession, should probably be called olmSession
this.session = null;
}
static fromOTK(device, oneTimeKey) {
public session: Olm.Session | null = null;
constructor(
public readonly device: DeviceIdentity,
public readonly oneTimeKey: string | null,
public readonly sessionId: string | null
) {}
static fromOTK(device: DeviceIdentity, oneTimeKey: string): EncryptionTarget {
return new EncryptionTarget(device, oneTimeKey, null);
}
static fromSessionId(device, sessionId) {
static fromSessionId(device: DeviceIdentity, sessionId: string): EncryptionTarget {
return new EncryptionTarget(device, null, sessionId);
}
dispose() {
dispose(): void {
if (this.session) {
this.session.free();
}
@ -285,8 +312,8 @@ class EncryptionTarget {
}
class EncryptedMessage {
constructor(content, device) {
this.content = content;
this.device = device;
}
constructor(
public readonly content: OlmEncryptedMessageContent,
public readonly device: DeviceIdentity
) {}
}