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naruyaizumi

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A WebSockets library for interacting with WhatsApp Web

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import { KEY_BUNDLE_TYPE } from "../Defaults/index.js"; import { assertNodeErrorFree, getBinaryNodeChild, getBinaryNodeChildBuffer, getBinaryNodeChildren, getBinaryNodeChildUInt, getServerFromDomainType, jidDecode, S_WHATSAPP_NET, WAJIDDomains, } from "../WABinary/index.js"; import { Curve, generateSignalPubKey } from "./crypto.js"; import { encodeBigEndian } from "./generics.js"; function chunk(array, size) { const chunks = []; for (let i = 0; i < array.length; i += size) { chunks.push(array.slice(i, i + size)); } return chunks; } export const createSignalIdentity = (wid, accountSignatureKey) => { return { identifier: { name: wid, deviceId: 0 }, identifierKey: generateSignalPubKey(accountSignatureKey), }; }; export const getPreKeys = async ({ get }, min, limit) => { const idList = []; for (let id = min; id < limit; id++) { idList.push(id.toString()); } return get("pre-key", idList); }; export const generateOrGetPreKeys = (creds, range) => { const avaliable = creds.nextPreKeyId - creds.firstUnuploadedPreKeyId; const remaining = range - avaliable; const lastPreKeyId = creds.nextPreKeyId + remaining - 1; const newPreKeys = {}; if (remaining > 0) { for (let i = creds.nextPreKeyId; i <= lastPreKeyId; i++) { newPreKeys[i] = Curve.generateKeyPair(); } } return { newPreKeys, lastPreKeyId, preKeysRange: [creds.firstUnuploadedPreKeyId, range], }; }; export const xmppSignedPreKey = (key) => ({ tag: "skey", attrs: {}, content: [ { tag: "id", attrs: {}, content: encodeBigEndian(key.keyId, 3) }, { tag: "value", attrs: {}, content: key.keyPair.public }, { tag: "signature", attrs: {}, content: key.signature }, ], }); export const xmppPreKey = (pair, id) => ({ tag: "key", attrs: {}, content: [ { tag: "id", attrs: {}, content: encodeBigEndian(id, 3) }, { tag: "value", attrs: {}, content: pair.public }, ], }); export const parseAndInjectE2ESessions = async (node, repository) => { const extractKey = (key) => key ? { keyId: getBinaryNodeChildUInt(key, "id", 3), publicKey: generateSignalPubKey(getBinaryNodeChildBuffer(key, "value")), signature: getBinaryNodeChildBuffer(key, "signature"), } : undefined; const nodes = getBinaryNodeChildren(getBinaryNodeChild(node, "list"), "user"); for (const node of nodes) { assertNodeErrorFree(node); } // Most of the work in repository.injectE2ESession is CPU intensive, not IO // So Promise.all doesn't really help here, // but blocks even loop if we're using it inside keys.transaction, and it makes it "sync" actually // This way we chunk it in smaller parts and between those parts we can yield to the event loop // It's rare case when you need to E2E sessions for so many users, but it's possible const chunkSize = 100; const chunks = chunk(nodes, chunkSize); for (const nodesChunk of chunks) { for (const node of nodesChunk) { const signedKey = getBinaryNodeChild(node, "skey"); const key = getBinaryNodeChild(node, "key"); const identity = getBinaryNodeChildBuffer(node, "identity"); const jid = node.attrs.jid; const registrationId = getBinaryNodeChildUInt(node, "registration", 4); await repository.injectE2ESession({ jid, session: { registrationId: registrationId, identityKey: generateSignalPubKey(identity), signedPreKey: extractKey(signedKey), preKey: extractKey(key), }, }); } } }; export const extractDeviceJids = (result, myJid, myLid, excludeZeroDevices) => { const { user: myUser, device: myDevice } = jidDecode(myJid); const extracted = []; for (const userResult of result) { const { devices, id } = userResult; const decoded = jidDecode(id), { user, server } = decoded; let { domainType } = decoded; const deviceList = devices?.deviceList; if (!Array.isArray(deviceList)) continue; for (const { id: device, keyIndex, isHosted } of deviceList) { if ( (!excludeZeroDevices || device !== 0) && // if zero devices are not-excluded, or device is non zero ((myUser !== user && myLid !== user) || myDevice !== device) && // either different user or if me user, not this device (device === 0 || !!keyIndex) // ensure that "key-index" is specified for "non-zero" devices, produces a bad req otherwise ) { if (isHosted) { domainType = domainType === WAJIDDomains.LID ? WAJIDDomains.HOSTED_LID : WAJIDDomains.HOSTED; } extracted.push({ user, device, domainType, server: getServerFromDomainType(server, domainType), }); } } } return extracted; }; /** * get the next N keys for upload or processing * @param count number of pre-keys to get or generate */ export const getNextPreKeys = async ({ creds, keys }, count) => { const { newPreKeys, lastPreKeyId, preKeysRange } = generateOrGetPreKeys(creds, count); const update = { nextPreKeyId: Math.max(lastPreKeyId + 1, creds.nextPreKeyId), firstUnuploadedPreKeyId: Math.max(creds.firstUnuploadedPreKeyId, lastPreKeyId + 1), }; await keys.set({ "pre-key": newPreKeys }); const preKeys = await getPreKeys(keys, preKeysRange[0], preKeysRange[0] + preKeysRange[1]); return { update, preKeys }; }; export const getNextPreKeysNode = async (state, count) => { const { creds } = state; const { update, preKeys } = await getNextPreKeys(state, count); const node = { tag: "iq", attrs: { xmlns: "encrypt", type: "set", to: S_WHATSAPP_NET, }, content: [ { tag: "registration", attrs: {}, content: encodeBigEndian(creds.registrationId) }, { tag: "type", attrs: {}, content: KEY_BUNDLE_TYPE }, { tag: "identity", attrs: {}, content: creds.signedIdentityKey.public }, { tag: "list", attrs: {}, content: Object.keys(preKeys).map((k) => xmppPreKey(preKeys[+k], +k)), }, xmppSignedPreKey(creds.signedPreKey), ], }; return { update, node }; }; //# sourceMappingURL=signal.js.map