diff --git a/web/shared-worker/worker/worker-crypto.js b/web/shared-worker/worker/worker-crypto.js index 8166c05ae..ec0ca349b 100644 --- a/web/shared-worker/worker/worker-crypto.js +++ b/web/shared-worker/worker/worker-crypto.js @@ -1,754 +1,783 @@ // @flow import olm from '@commapp/olm'; import localforage from 'localforage'; import uuid from 'uuid'; import { initialEncryptedMessageContent } from 'lib/shared/crypto-utils.js'; import { hasMinCodeVersion } from 'lib/shared/version-utils.js'; import { type OLMIdentityKeys, type PickledOLMAccount, type IdentityKeysBlob, type SignedIdentityKeysBlob, type OlmAPI, type OneTimeKeysResultValues, type ClientPublicKeys, type NotificationsOlmDataType, type EncryptedData, type OutboundSessionCreationResult, } from 'lib/types/crypto-types.js'; import type { PlatformDetails } from 'lib/types/device-types.js'; import type { IdentityNewDeviceKeyUpload, IdentityExistingDeviceKeyUpload, } from 'lib/types/identity-service-types.js'; import type { OlmSessionInitializationInfo } from 'lib/types/request-types.js'; +import type { ReceivedMessageToDevice } from 'lib/types/sqlite-types.js'; import { entries } from 'lib/utils/objects.js'; import { retrieveAccountKeysSet, getAccountOneTimeKeys, getAccountPrekeysSet, shouldForgetPrekey, shouldRotatePrekey, retrieveIdentityKeysAndPrekeys, olmSessionErrors, } from 'lib/utils/olm-utils.js'; import { getIdentityClient } from './identity-client.js'; import { getProcessingStoreOpsExceptionMessage } from './process-operations.js'; import { getDBModule, getSQLiteQueryExecutor, getPlatformDetails, } from './worker-database.js'; import { encryptData, exportKeyToJWK, generateCryptoKey, } from '../../crypto/aes-gcm-crypto-utils.js'; import { getOlmDataContentKeyForCookie, getOlmEncryptionKeyDBLabelForCookie, } from '../../push-notif/notif-crypto-utils.js'; import { type WorkerRequestMessage, type WorkerResponseMessage, workerRequestMessageTypes, workerResponseMessageTypes, type LegacyCryptoStore, } from '../../types/worker-types.js'; import type { OlmPersistSession } from '../types/sqlite-query-executor.js'; import { isDesktopSafari } from '../utils/db-utils.js'; type OlmSession = { +session: olm.Session, +version: number }; type OlmSessions = { [deviceID: string]: OlmSession, }; type WorkerCryptoStore = { +contentAccountPickleKey: string, +contentAccount: olm.Account, +contentSessions: OlmSessions, +notificationAccountPickleKey: string, +notificationAccount: olm.Account, }; let cryptoStore: ?WorkerCryptoStore = null; function clearCryptoStore() { cryptoStore = null; } -function persistCryptoStore() { +function persistCryptoStore(withoutTransaction: boolean = false) { const sqliteQueryExecutor = getSQLiteQueryExecutor(); const dbModule = getDBModule(); if (!sqliteQueryExecutor || !dbModule) { throw new Error( "Couldn't persist crypto store because database is not initialized", ); } if (!cryptoStore) { throw new Error("Couldn't persist crypto store because it doesn't exist"); } const { contentAccountPickleKey, contentAccount, contentSessions, notificationAccountPickleKey, notificationAccount, } = cryptoStore; const pickledContentAccount: PickledOLMAccount = { picklingKey: contentAccountPickleKey, pickledAccount: contentAccount.pickle(contentAccountPickleKey), }; const pickledContentSessions: OlmPersistSession[] = entries( contentSessions, ).map(([targetDeviceID, sessionData]) => ({ targetDeviceID, sessionData: sessionData.session.pickle(contentAccountPickleKey), version: sessionData.version, })); const pickledNotificationAccount: PickledOLMAccount = { picklingKey: notificationAccountPickleKey, pickledAccount: notificationAccount.pickle(notificationAccountPickleKey), }; try { - sqliteQueryExecutor.beginTransaction(); + if (!withoutTransaction) { + sqliteQueryExecutor.beginTransaction(); + } sqliteQueryExecutor.storeOlmPersistAccount( sqliteQueryExecutor.getContentAccountID(), JSON.stringify(pickledContentAccount), ); for (const pickledSession of pickledContentSessions) { sqliteQueryExecutor.storeOlmPersistSession(pickledSession); } sqliteQueryExecutor.storeOlmPersistAccount( sqliteQueryExecutor.getNotifsAccountID(), JSON.stringify(pickledNotificationAccount), ); - sqliteQueryExecutor.commitTransaction(); + if (!withoutTransaction) { + sqliteQueryExecutor.commitTransaction(); + } } catch (err) { - sqliteQueryExecutor.rollbackTransaction(); + if (!withoutTransaction) { + sqliteQueryExecutor.rollbackTransaction(); + } throw new Error(getProcessingStoreOpsExceptionMessage(err, dbModule)); } } function getOrCreateOlmAccount(accountIDInDB: number): { +picklingKey: string, +account: olm.Account, } { const sqliteQueryExecutor = getSQLiteQueryExecutor(); const dbModule = getDBModule(); if (!sqliteQueryExecutor || !dbModule) { throw new Error('Database not initialized'); } const account = new olm.Account(); let picklingKey; let accountDBString; try { accountDBString = sqliteQueryExecutor.getOlmPersistAccountDataWeb(accountIDInDB); } catch (err) { throw new Error(getProcessingStoreOpsExceptionMessage(err, dbModule)); } if (accountDBString.isNull) { picklingKey = uuid.v4(); account.create(); } else { const dbAccount: PickledOLMAccount = JSON.parse(accountDBString.value); picklingKey = dbAccount.picklingKey; account.unpickle(picklingKey, dbAccount.pickledAccount); } return { picklingKey, account }; } function getOlmSessions(picklingKey: string): OlmSessions { const sqliteQueryExecutor = getSQLiteQueryExecutor(); const dbModule = getDBModule(); if (!sqliteQueryExecutor || !dbModule) { throw new Error( "Couldn't get olm sessions because database is not initialized", ); } let dbSessionsData; try { dbSessionsData = sqliteQueryExecutor.getOlmPersistSessionsData(); } catch (err) { throw new Error(getProcessingStoreOpsExceptionMessage(err, dbModule)); } const sessionsData: OlmSessions = {}; for (const persistedSession: OlmPersistSession of dbSessionsData) { const { sessionData, version } = persistedSession; const session = new olm.Session(); session.unpickle(picklingKey, sessionData); sessionsData[persistedSession.targetDeviceID] = { session, version, }; } return sessionsData; } function unpickleInitialCryptoStoreAccount( account: PickledOLMAccount, ): olm.Account { const { picklingKey, pickledAccount } = account; const olmAccount = new olm.Account(); olmAccount.unpickle(picklingKey, pickledAccount); return olmAccount; } async function initializeCryptoAccount( olmWasmPath: string, initialCryptoStore: ?LegacyCryptoStore, ) { const sqliteQueryExecutor = getSQLiteQueryExecutor(); if (!sqliteQueryExecutor) { throw new Error('Database not initialized'); } await olm.init({ locateFile: () => olmWasmPath }); if (initialCryptoStore) { cryptoStore = { contentAccountPickleKey: initialCryptoStore.primaryAccount.picklingKey, contentAccount: unpickleInitialCryptoStoreAccount( initialCryptoStore.primaryAccount, ), contentSessions: {}, notificationAccountPickleKey: initialCryptoStore.notificationAccount.picklingKey, notificationAccount: unpickleInitialCryptoStoreAccount( initialCryptoStore.notificationAccount, ), }; persistCryptoStore(); return; } await olmAPI.initializeCryptoAccount(); } async function processAppOlmApiRequest( message: WorkerRequestMessage, ): Promise { if (message.type === workerRequestMessageTypes.INITIALIZE_CRYPTO_ACCOUNT) { await initializeCryptoAccount( message.olmWasmPath, message.initialCryptoStore, ); } else if (message.type === workerRequestMessageTypes.CALL_OLM_API_METHOD) { const method: (...$ReadOnlyArray) => mixed = (olmAPI[ message.method ]: any); // Flow doesn't allow us to bind the (stringified) method name with // the argument types so we need to pass the args as mixed. const result = await method(...message.args); return { type: workerResponseMessageTypes.CALL_OLM_API_METHOD, result, }; } return undefined; } function getSignedIdentityKeysBlob(): SignedIdentityKeysBlob { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount, notificationAccount } = cryptoStore; const identityKeysBlob: IdentityKeysBlob = { notificationIdentityPublicKeys: JSON.parse( notificationAccount.identity_keys(), ), primaryIdentityPublicKeys: JSON.parse(contentAccount.identity_keys()), }; const payloadToBeSigned: string = JSON.stringify(identityKeysBlob); const signedIdentityKeysBlob: SignedIdentityKeysBlob = { payload: payloadToBeSigned, signature: contentAccount.sign(payloadToBeSigned), }; return signedIdentityKeysBlob; } function getNewDeviceKeyUpload(): IdentityNewDeviceKeyUpload { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount, notificationAccount } = cryptoStore; const signedIdentityKeysBlob = getSignedIdentityKeysBlob(); const primaryAccountKeysSet = retrieveAccountKeysSet(contentAccount); const notificationAccountKeysSet = retrieveAccountKeysSet(notificationAccount); persistCryptoStore(); return { keyPayload: signedIdentityKeysBlob.payload, keyPayloadSignature: signedIdentityKeysBlob.signature, contentPrekey: primaryAccountKeysSet.prekey, contentPrekeySignature: primaryAccountKeysSet.prekeySignature, notifPrekey: notificationAccountKeysSet.prekey, notifPrekeySignature: notificationAccountKeysSet.prekeySignature, contentOneTimeKeys: primaryAccountKeysSet.oneTimeKeys, notifOneTimeKeys: notificationAccountKeysSet.oneTimeKeys, }; } function getExistingDeviceKeyUpload(): IdentityExistingDeviceKeyUpload { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount, notificationAccount } = cryptoStore; const signedIdentityKeysBlob = getSignedIdentityKeysBlob(); const { prekey: contentPrekey, prekeySignature: contentPrekeySignature } = retrieveIdentityKeysAndPrekeys(contentAccount); const { prekey: notifPrekey, prekeySignature: notifPrekeySignature } = retrieveIdentityKeysAndPrekeys(notificationAccount); persistCryptoStore(); return { keyPayload: signedIdentityKeysBlob.payload, keyPayloadSignature: signedIdentityKeysBlob.signature, contentPrekey, contentPrekeySignature, notifPrekey, notifPrekeySignature, }; } function getNotifsPersistenceKeys( cookie: ?string, keyserverID: string, platformDetails: PlatformDetails, ) { if (hasMinCodeVersion(platformDetails, { majorDesktop: 12 })) { return { notifsOlmDataEncryptionKeyDBLabel: getOlmEncryptionKeyDBLabelForCookie( cookie, keyserverID, ), notifsOlmDataContentKey: getOlmDataContentKeyForCookie( cookie, keyserverID, ), }; } else { return { notifsOlmDataEncryptionKeyDBLabel: getOlmEncryptionKeyDBLabelForCookie(cookie), notifsOlmDataContentKey: getOlmDataContentKeyForCookie(cookie), }; } } async function reassignLocalForageItem(source: string, destination: string) { const value = await localforage.getItem(source); if (!value) { return; } const valueAtDestination = await localforage.getItem(destination); if (!valueAtDestination) { await localforage.setItem(destination, value); } await localforage.removeItem(source); } const olmAPI: OlmAPI = { async initializeCryptoAccount(): Promise { const sqliteQueryExecutor = getSQLiteQueryExecutor(); if (!sqliteQueryExecutor) { throw new Error('Database not initialized'); } const contentAccountResult = getOrCreateOlmAccount( sqliteQueryExecutor.getContentAccountID(), ); const notificationAccountResult = getOrCreateOlmAccount( sqliteQueryExecutor.getNotifsAccountID(), ); const contentSessions = getOlmSessions(contentAccountResult.picklingKey); cryptoStore = { contentAccountPickleKey: contentAccountResult.picklingKey, contentAccount: contentAccountResult.account, contentSessions, notificationAccountPickleKey: notificationAccountResult.picklingKey, notificationAccount: notificationAccountResult.account, }; persistCryptoStore(); }, async getUserPublicKey(): Promise { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount, notificationAccount } = cryptoStore; const { payload, signature } = getSignedIdentityKeysBlob(); return { primaryIdentityPublicKeys: JSON.parse(contentAccount.identity_keys()), notificationIdentityPublicKeys: JSON.parse( notificationAccount.identity_keys(), ), blobPayload: payload, signature, }; }, async encrypt(content: string, deviceID: string): Promise { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { session } = cryptoStore.contentSessions[deviceID]; if (!session) { throw new Error(`No session for deviceID: ${deviceID}`); } const encryptedContent = session.encrypt(content); persistCryptoStore(); return { message: encryptedContent.body, messageType: encryptedContent.type, }; }, async decrypt( encryptedData: EncryptedData, deviceID: string, ): Promise { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { session } = cryptoStore.contentSessions[deviceID]; if (!session) { throw new Error(`No session for deviceID: ${deviceID}`); } const result = session.decrypt( encryptedData.messageType, encryptedData.message, ); persistCryptoStore(); return result; }, async decryptSequential( encryptedData: EncryptedData, deviceID: string, - // eslint-disable-next-line no-unused-vars messageID: string, ): Promise { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { session } = cryptoStore.contentSessions[deviceID]; if (!session) { throw new Error(`No session for deviceID: ${deviceID}`); } const result = session.decrypt_sequential( encryptedData.messageType, encryptedData.message, ); - persistCryptoStore(); + const sqliteQueryExecutor = getSQLiteQueryExecutor(); + const dbModule = getDBModule(); + if (!sqliteQueryExecutor || !dbModule) { + throw new Error( + "Couldn't persist crypto store because database is not initialized", + ); + } + + const receivedMessage: ReceivedMessageToDevice = { + messageID, + senderDeviceID: deviceID, + plaintext: result, + status: 'decrypted', + }; + + sqliteQueryExecutor.beginTransaction(); + try { + sqliteQueryExecutor.addReceivedMessageToDevice(receivedMessage); + persistCryptoStore(true); + sqliteQueryExecutor.commitTransaction(); + } catch (e) { + sqliteQueryExecutor.rollbackTransaction(); + throw e; + } return result; }, async contentInboundSessionCreator( contentIdentityKeys: OLMIdentityKeys, initialEncryptedData: EncryptedData, sessionVersion: number, overwrite: boolean, ): Promise { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount, contentSessions } = cryptoStore; const existingSession = contentSessions[contentIdentityKeys.ed25519]; if (existingSession) { if (!overwrite && existingSession.version > sessionVersion) { throw new Error(olmSessionErrors.alreadyCreated); } else if (!overwrite && existingSession.version === sessionVersion) { throw new Error(olmSessionErrors.raceCondition); } } const session = new olm.Session(); session.create_inbound_from( contentAccount, contentIdentityKeys.curve25519, initialEncryptedData.message, ); contentAccount.remove_one_time_keys(session); const initialEncryptedMessage = session.decrypt( initialEncryptedData.messageType, initialEncryptedData.message, ); contentSessions[contentIdentityKeys.ed25519] = { session, version: sessionVersion, }; persistCryptoStore(); return initialEncryptedMessage; }, async contentOutboundSessionCreator( contentIdentityKeys: OLMIdentityKeys, contentInitializationInfo: OlmSessionInitializationInfo, ): Promise { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount, contentSessions } = cryptoStore; const existingSession = contentSessions[contentIdentityKeys.ed25519]; const session = new olm.Session(); session.create_outbound( contentAccount, contentIdentityKeys.curve25519, contentIdentityKeys.ed25519, contentInitializationInfo.prekey, contentInitializationInfo.prekeySignature, contentInitializationInfo.oneTimeKey, ); const initialEncryptedData = session.encrypt( JSON.stringify(initialEncryptedMessageContent), ); const newSessionVersion = existingSession ? existingSession.version + 1 : 1; contentSessions[contentIdentityKeys.ed25519] = { session, version: newSessionVersion, }; persistCryptoStore(); const encryptedData: EncryptedData = { message: initialEncryptedData.body, messageType: initialEncryptedData.type, }; return { encryptedData, sessionVersion: newSessionVersion }; }, async notificationsSessionCreator( cookie: ?string, notificationsIdentityKeys: OLMIdentityKeys, notificationsInitializationInfo: OlmSessionInitializationInfo, keyserverID: string, ): Promise { const platformDetails = getPlatformDetails(); if (!platformDetails) { throw new Error('Worker not initialized'); } if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { notificationAccountPickleKey, notificationAccount } = cryptoStore; const encryptionKey = await generateCryptoKey({ extractable: isDesktopSafari, }); const notificationsPrekey = notificationsInitializationInfo.prekey; const session = new olm.Session(); session.create_outbound( notificationAccount, notificationsIdentityKeys.curve25519, notificationsIdentityKeys.ed25519, notificationsPrekey, notificationsInitializationInfo.prekeySignature, notificationsInitializationInfo.oneTimeKey, ); const { body: initialNotificationsEncryptedMessage } = session.encrypt( JSON.stringify(initialEncryptedMessageContent), ); const mainSession = session.pickle(notificationAccountPickleKey); const notificationsOlmData: NotificationsOlmDataType = { mainSession, pendingSessionUpdate: mainSession, updateCreationTimestamp: Date.now(), picklingKey: notificationAccountPickleKey, }; const encryptedOlmData = await encryptData( new TextEncoder().encode(JSON.stringify(notificationsOlmData)), encryptionKey, ); const { notifsOlmDataContentKey, notifsOlmDataEncryptionKeyDBLabel } = getNotifsPersistenceKeys(cookie, keyserverID, platformDetails); const persistEncryptionKeyPromise = (async () => { let cryptoKeyPersistentForm; if (isDesktopSafari) { // Safari doesn't support structured clone algorithm in service // worker context so we have to store CryptoKey as JSON cryptoKeyPersistentForm = await exportKeyToJWK(encryptionKey); } else { cryptoKeyPersistentForm = encryptionKey; } await localforage.setItem( notifsOlmDataEncryptionKeyDBLabel, cryptoKeyPersistentForm, ); })(); await Promise.all([ localforage.setItem(notifsOlmDataContentKey, encryptedOlmData), persistEncryptionKeyPromise, ]); return initialNotificationsEncryptedMessage; }, async reassignNotificationsSession( prevCookie: ?string, newCookie: ?string, keyserverID: string, ): Promise { const platformDetails = getPlatformDetails(); if (!platformDetails) { throw new Error('Worker not initialized'); } const prevPersistenceKeys = getNotifsPersistenceKeys( prevCookie, keyserverID, platformDetails, ); const newPersistenceKeys = getNotifsPersistenceKeys( newCookie, keyserverID, platformDetails, ); await Promise.all([ reassignLocalForageItem( prevPersistenceKeys.notifsOlmDataContentKey, newPersistenceKeys.notifsOlmDataContentKey, ), reassignLocalForageItem( prevPersistenceKeys.notifsOlmDataEncryptionKeyDBLabel, newPersistenceKeys.notifsOlmDataEncryptionKeyDBLabel, ), ]); }, async getOneTimeKeys(numberOfKeys: number): Promise { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount, notificationAccount } = cryptoStore; const contentOneTimeKeys = getAccountOneTimeKeys( contentAccount, numberOfKeys, ); contentAccount.mark_keys_as_published(); const notificationsOneTimeKeys = getAccountOneTimeKeys( notificationAccount, numberOfKeys, ); notificationAccount.mark_keys_as_published(); persistCryptoStore(); return { contentOneTimeKeys, notificationsOneTimeKeys }; }, async validateAndUploadPrekeys(authMetadata): Promise { const { userID, deviceID, accessToken } = authMetadata; if (!userID || !deviceID || !accessToken) { return; } const identityClient = getIdentityClient(); if (!identityClient) { throw new Error('Identity client not initialized'); } if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount, notificationAccount } = cryptoStore; // Content and notification accounts' keys are always rotated at the same // time so we only need to check one of them. if (shouldRotatePrekey(contentAccount)) { contentAccount.generate_prekey(); notificationAccount.generate_prekey(); } if (shouldForgetPrekey(contentAccount)) { contentAccount.forget_old_prekey(); notificationAccount.forget_old_prekey(); } persistCryptoStore(); if (!contentAccount.unpublished_prekey()) { return; } const { prekey: notifPrekey, prekeySignature: notifPrekeySignature } = getAccountPrekeysSet(notificationAccount); const { prekey: contentPrekey, prekeySignature: contentPrekeySignature } = getAccountPrekeysSet(contentAccount); if (!notifPrekeySignature || !contentPrekeySignature) { throw new Error('Prekey signature is missing'); } await identityClient.publishWebPrekeys({ contentPrekey, contentPrekeySignature, notifPrekey, notifPrekeySignature, }); contentAccount.mark_prekey_as_published(); notificationAccount.mark_prekey_as_published(); persistCryptoStore(); }, async signMessage(message: string): Promise { if (!cryptoStore) { throw new Error('Crypto account not initialized'); } const { contentAccount } = cryptoStore; return contentAccount.sign(message); }, }; export { clearCryptoStore, processAppOlmApiRequest, getSignedIdentityKeysBlob, getNewDeviceKeyUpload, getExistingDeviceKeyUpload, };