@periskope/baileys
Version:
WhatsApp API
197 lines • 7.9 kB
JavaScript
import { KEY_BUNDLE_TYPE } from '../Defaults/index.js';
import { assertNodeErrorFree, getBinaryNodeChild, getBinaryNodeChildBuffer, getBinaryNodeChildren, getBinaryNodeChildUInt, jidDecode, S_WHATSAPP_NET } 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) {
await Promise.all(nodesChunk.map(async (node) => {
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)
}
});
}));
}
};
/**
* Fetch prekeys for specified JIDs from WhatsApp servers
* Inspired by whatsmeow's fetchPreKeys implementation
* @param jids Array of JIDs to fetch prekeys for
* @param queryFn Function to send IQ queries to WhatsApp servers
* @param signalRepository Signal repository for session injection
* @param logger Logger instance for debugging
* @returns Promise<boolean> indicating if prekeys were successfully fetched
*/
export const fetchPreKeys = async (jids, queryFn, signalRepository, logger) => {
if (!jids.length) {
return false;
}
try {
logger?.debug({ jids }, 'fetching prekeys for session recreation');
// Create prekey request similar to whatsmeow's fetchPreKeys
const result = await queryFn({
tag: 'iq',
attrs: {
xmlns: 'encrypt',
type: 'get',
to: S_WHATSAPP_NET
},
content: [
{
tag: 'key',
attrs: {},
content: jids.map(jid => ({
tag: 'user',
attrs: {
jid,
reason: 'identity' // Same as whatsmeow
}
}))
}
]
});
// Parse and inject E2E sessions using existing function
await parseAndInjectE2ESessions(result, signalRepository);
logger?.debug({ jids }, 'successfully fetched and injected prekeys');
return true;
}
catch (error) {
logger?.error({ jids, error }, 'failed to fetch prekeys');
return false;
}
};
export const extractDeviceJids = (result, myJid, excludeZeroDevices) => {
const { user: myUser, device: myDevice } = jidDecode(myJid);
const extracted = [];
for (const userResult of result) {
const { devices, id } = userResult;
const { user } = jidDecode(id);
const deviceList = devices?.deviceList;
if (Array.isArray(deviceList)) {
for (const { id: device, keyIndex } of deviceList) {
if ((!excludeZeroDevices || device !== 0) && // if zero devices are not-excluded, or device is non zero
(myUser !== 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
) {
extracted.push({ user, device });
}
}
}
}
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 };
};
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