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Finished requestPairingCode

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This commit is contained in:
Alessandro Autiero
2023-07-16 20:14:17 +02:00
parent f498e1e56c
commit c506182035
8 changed files with 68 additions and 74 deletions
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41
src/Socket/messages-recv.ts
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@@ -2,16 +2,17 @@
import { Boom } from '@hapi/boom'
import { randomBytes } from 'crypto'
import NodeCache from 'node-cache'
import { getBinaryNodeChildBuffer } from '../../lib'
import { proto } from '../../WAProto'
import { DEFAULT_CACHE_TTLS, KEY_BUNDLE_TYPE, MIN_PREKEY_COUNT } from '../Defaults'
import { MessageReceiptType, MessageRelayOptions, MessageUserReceipt, SocketConfig, WACallEvent, WAMessageKey, WAMessageStatus, WAMessageStubType, WAPatchName } from '../Types'
import {
aesDecryptCTR,
aesEncryptGCM,
Curve,
decodeMediaRetryNode,
decryptMessageNode,
delay, derivePairingKey,
delay,
derivePairingCodeKey,
encodeBigEndian,
encodeSignedDeviceIdentity,
getCallStatusFromNode,
@@ -24,7 +25,19 @@ import {
} from '../Utils'
import { cleanMessage } from '../Utils'
import { makeMutex } from '../Utils/make-mutex'
import { areJidsSameUser, BinaryNode, getAllBinaryNodeChildren, getBinaryNodeChild, getBinaryNodeChildren, isJidGroup, isJidUser, jidDecode, jidNormalizedUser, S_WHATSAPP_NET } from '../WABinary'
import {
areJidsSameUser,
BinaryNode,
getAllBinaryNodeChildren,
getBinaryNodeChild,
getBinaryNodeChildBuffer,
getBinaryNodeChildren,
isJidGroup,
isJidUser,
jidDecode,
jidNormalizedUser,
S_WHATSAPP_NET
} from '../WABinary'
import { extractGroupMetadata } from './groups'
import { makeMessagesSocket } from './messages-send'
@@ -387,22 +400,21 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
const ref = toRequiredBuffer(getBinaryNodeChildBuffer(linkCodeCompanionReg, 'link_code_pairing_ref'))
const primaryIdentityPublicKey = toRequiredBuffer(getBinaryNodeChildBuffer(linkCodeCompanionReg, 'primary_identity_pub'))
const primaryEphemeralPublicKeyWrapped = toRequiredBuffer(getBinaryNodeChildBuffer(linkCodeCompanionReg, 'link_code_pairing_wrapped_primary_ephemeral_pub'))
const codePairingPublicKey = await decipherLinkPublicKey(primaryEphemeralPublicKeyWrapped)
const companionSharedKey = Curve.sharedKey(codePairingPublicKey, authState.creds.advKeyPair.private)
const codePairingPublicKey = decipherLinkPublicKey(primaryEphemeralPublicKeyWrapped)
const companionSharedKey = Curve.sharedKey(authState.creds.pairingEphemeralKeyPair.private, codePairingPublicKey)
const random = randomBytes(32)
const linkCodeSalt = randomBytes(32)
const linkCodePairingExpanded = hkdf(companionSharedKey, 32, {
salt: linkCodeSalt,
info: 'link_code_pairing_key_bundle_encryption_key'
})
const encryptPayload = Buffer.concat([Buffer.from(authState.creds.signedIdentityKey.public), Buffer.from(primaryIdentityPublicKey), random])
const encryptPayload = Buffer.concat([Buffer.from(authState.creds.signedIdentityKey.public), primaryIdentityPublicKey, random])
const encryptIv = randomBytes(12)
const encrypted = aesEncryptGCM(encryptPayload, linkCodePairingExpanded, encryptIv, Buffer.alloc(0))
const encryptedPayload = Buffer.concat([linkCodeSalt, encryptIv, encrypted])
const identitySharedKey = Curve.sharedKey(primaryIdentityPublicKey, authState.creds.signedIdentityKey.private)
const identitySharedKey = Curve.sharedKey(authState.creds.signedIdentityKey.private, primaryIdentityPublicKey)
const identityPayload = Buffer.concat([companionSharedKey, identitySharedKey, random])
authState.creds.advKeyPair.public = hkdf(identityPayload, 32, { info: 'adv_secret' })
authState.creds.advKeyPair.private = Buffer.alloc(0)
authState.creds.advSecretKey = hkdf(identityPayload, 32, { info: 'adv_secret' }).toString('base64')
await sendNode({
tag: 'iq',
attrs: {
@@ -446,18 +458,13 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
}
}
async function decipherLinkPublicKey(data: Uint8Array | Buffer) {
function decipherLinkPublicKey(data: Uint8Array | Buffer) {
const buffer = toRequiredBuffer(data)
const salt = buffer.slice(0, 32)
const secretKey = await derivePairingKey(authState.creds.pairingCode!, salt)
const secretKey = derivePairingCodeKey(authState.creds.pairingCode!, salt)
const iv = buffer.slice(32, 48)
const payload = buffer.slice(48, 80)
const result = await crypto.subtle.decrypt({
name: 'AES-CTR',
length: 64,
counter: iv
}, secretKey, payload)
return Buffer.from(result)
return aesDecryptCTR(payload, secretKey, iv)
}
function toRequiredBuffer(data: Uint8Array | Buffer | undefined) {