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607 lines
19 KiB
Go
607 lines
19 KiB
Go
// Copyright (c) 2024 Tulir Asokan
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package whatsmeow
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import (
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"context"
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"crypto/hmac"
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"crypto/sha256"
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"errors"
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"fmt"
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"time"
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"github.com/google/uuid"
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"go.mau.fi/libsignal/groups"
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"go.mau.fi/libsignal/keys/prekey"
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"go.mau.fi/libsignal/protocol"
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"go.mau.fi/libsignal/session"
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"go.mau.fi/libsignal/signalerror"
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"go.mau.fi/util/random"
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"google.golang.org/protobuf/proto"
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waBinary "go.mau.fi/whatsmeow/binary"
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"go.mau.fi/whatsmeow/binary/armadillo/waCommon"
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"go.mau.fi/whatsmeow/binary/armadillo/waConsumerApplication"
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"go.mau.fi/whatsmeow/binary/armadillo/waMsgApplication"
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"go.mau.fi/whatsmeow/binary/armadillo/waMsgTransport"
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"go.mau.fi/whatsmeow/types"
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"go.mau.fi/whatsmeow/types/events"
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)
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const FBMessageVersion = 3
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const FBMessageApplicationVersion = 2
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const FBConsumerMessageVersion = 1
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// SendFBMessage sends the given v3 message to the given JID.
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func (cli *Client) SendFBMessage(
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ctx context.Context,
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to types.JID,
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message *waConsumerApplication.ConsumerApplication,
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metadata *waMsgApplication.MessageApplication_Metadata,
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extra ...SendRequestExtra,
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) (resp SendResponse, err error) {
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var req SendRequestExtra
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if len(extra) > 1 {
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err = errors.New("only one extra parameter may be provided to SendMessage")
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return
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} else if len(extra) == 1 {
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req = extra[0]
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}
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consumerMessage, err := proto.Marshal(message)
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if err != nil {
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err = fmt.Errorf("failed to marshal consumer message: %w", err)
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return
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}
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if metadata == nil {
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metadata = &waMsgApplication.MessageApplication_Metadata{}
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}
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metadata.FrankingVersion = 0
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metadata.FrankingKey = random.Bytes(32)
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msgAttrs := getAttrsFromFBMessage(message)
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messageAppProto := &waMsgApplication.MessageApplication{
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Payload: &waMsgApplication.MessageApplication_Payload{
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Content: &waMsgApplication.MessageApplication_Payload_SubProtocol{
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SubProtocol: &waMsgApplication.MessageApplication_SubProtocolPayload{
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SubProtocol: &waMsgApplication.MessageApplication_SubProtocolPayload_ConsumerMessage{
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ConsumerMessage: &waCommon.SubProtocol{
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Payload: consumerMessage,
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Version: FBConsumerMessageVersion,
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},
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},
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FutureProof: waCommon.FutureProofBehavior_PLACEHOLDER,
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},
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},
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},
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Metadata: metadata,
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}
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messageApp, err := proto.Marshal(messageAppProto)
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if err != nil {
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return resp, fmt.Errorf("failed to marshal message application: %w", err)
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}
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frankingHash := hmac.New(sha256.New, metadata.FrankingKey)
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frankingHash.Write(messageApp)
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frankingTag := frankingHash.Sum(nil)
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if to.Device > 0 && !req.Peer {
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err = ErrRecipientADJID
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return
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}
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ownID := cli.getOwnID()
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if ownID.IsEmpty() {
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err = ErrNotLoggedIn
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return
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}
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if req.Timeout == 0 {
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req.Timeout = defaultRequestTimeout
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}
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if len(req.ID) == 0 {
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req.ID = cli.GenerateMessageID()
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}
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resp.ID = req.ID
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start := time.Now()
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// Sending multiple messages at a time can cause weird issues and makes it harder to retry safely
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cli.messageSendLock.Lock()
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resp.DebugTimings.Queue = time.Since(start)
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defer cli.messageSendLock.Unlock()
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respChan := cli.waitResponse(req.ID)
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if !req.Peer {
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cli.addRecentMessage(to, req.ID, nil, messageAppProto)
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}
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var phash string
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var data []byte
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switch to.Server {
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case types.GroupServer:
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phash, data, err = cli.sendGroupV3(ctx, to, ownID, req.ID, messageApp, msgAttrs, frankingTag, &resp.DebugTimings)
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case types.DefaultUserServer, types.MessengerServer:
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if req.Peer {
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err = fmt.Errorf("peer messages to fb are not yet supported")
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//data, err = cli.sendPeerMessage(to, req.ID, message, &resp.DebugTimings)
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} else {
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data, phash, err = cli.sendDMV3(ctx, to, ownID, req.ID, messageApp, msgAttrs, frankingTag, &resp.DebugTimings)
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}
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default:
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err = fmt.Errorf("%w %s", ErrUnknownServer, to.Server)
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}
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start = time.Now()
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if err != nil {
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cli.cancelResponse(req.ID, respChan)
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return
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}
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var respNode *waBinary.Node
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var timeoutChan <-chan time.Time
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if req.Timeout > 0 {
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timeoutChan = time.After(req.Timeout)
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} else {
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timeoutChan = make(<-chan time.Time)
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}
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select {
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case respNode = <-respChan:
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case <-timeoutChan:
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cli.cancelResponse(req.ID, respChan)
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err = ErrMessageTimedOut
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return
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case <-ctx.Done():
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cli.cancelResponse(req.ID, respChan)
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err = ctx.Err()
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return
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}
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resp.DebugTimings.Resp = time.Since(start)
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if isDisconnectNode(respNode) {
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start = time.Now()
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respNode, err = cli.retryFrame("message send", req.ID, data, respNode, ctx, 0)
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resp.DebugTimings.Retry = time.Since(start)
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if err != nil {
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return
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}
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}
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ag := respNode.AttrGetter()
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resp.ServerID = types.MessageServerID(ag.OptionalInt("server_id"))
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resp.Timestamp = ag.UnixTime("t")
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if errorCode := ag.Int("error"); errorCode != 0 {
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err = fmt.Errorf("%w %d", ErrServerReturnedError, errorCode)
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}
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expectedPHash := ag.OptionalString("phash")
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if len(expectedPHash) > 0 && phash != expectedPHash {
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cli.Log.Warnf("Server returned different participant list hash when sending to %s. Some devices may not have received the message.", to)
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// TODO also invalidate device list caches
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cli.groupParticipantsCacheLock.Lock()
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delete(cli.groupParticipantsCache, to)
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cli.groupParticipantsCacheLock.Unlock()
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}
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return
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}
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func (cli *Client) sendGroupV3(
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ctx context.Context,
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to,
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ownID types.JID,
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id types.MessageID,
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messageApp []byte,
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msgAttrs messageAttrs,
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frankingTag []byte,
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timings *MessageDebugTimings,
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) (string, []byte, error) {
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var participants []types.JID
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var err error
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start := time.Now()
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if to.Server == types.GroupServer {
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participants, err = cli.getGroupMembers(ctx, to)
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if err != nil {
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return "", nil, fmt.Errorf("failed to get group members: %w", err)
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}
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}
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timings.GetParticipants = time.Since(start)
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start = time.Now()
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builder := groups.NewGroupSessionBuilder(cli.Store, pbSerializer)
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senderKeyName := protocol.NewSenderKeyName(to.String(), ownID.SignalAddress())
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signalSKDMessage, err := builder.Create(senderKeyName)
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if err != nil {
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return "", nil, fmt.Errorf("failed to create sender key distribution message to send %s to %s: %w", id, to, err)
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}
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skdm := &waMsgTransport.MessageTransport_Protocol_Ancillary_SenderKeyDistributionMessage{
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GroupID: to.String(),
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AxolotlSenderKeyDistributionMessage: signalSKDMessage.Serialize(),
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}
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cipher := groups.NewGroupCipher(builder, senderKeyName, cli.Store)
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plaintext, err := proto.Marshal(&waMsgTransport.MessageTransport{
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Payload: &waMsgTransport.MessageTransport_Payload{
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ApplicationPayload: &waCommon.SubProtocol{
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Payload: messageApp,
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Version: FBMessageApplicationVersion,
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},
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FutureProof: waCommon.FutureProofBehavior_PLACEHOLDER,
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},
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Protocol: &waMsgTransport.MessageTransport_Protocol{
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Integral: &waMsgTransport.MessageTransport_Protocol_Integral{
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Padding: padMessage(nil),
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DSM: nil,
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},
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Ancillary: &waMsgTransport.MessageTransport_Protocol_Ancillary{
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Skdm: nil,
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DeviceListMetadata: nil,
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Icdc: nil,
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BackupDirective: &waMsgTransport.MessageTransport_Protocol_Ancillary_BackupDirective{
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MessageID: id,
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ActionType: waMsgTransport.MessageTransport_Protocol_Ancillary_BackupDirective_UPSERT,
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},
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},
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},
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})
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if err != nil {
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return "", nil, fmt.Errorf("failed to marshal message transport: %w", err)
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}
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encrypted, err := cipher.Encrypt(plaintext)
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if err != nil {
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return "", nil, fmt.Errorf("failed to encrypt group message to send %s to %s: %w", id, to, err)
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}
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ciphertext := encrypted.SignedSerialize()
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timings.GroupEncrypt = time.Since(start)
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node, allDevices, err := cli.prepareMessageNodeV3(ctx, to, ownID, id, nil, skdm, msgAttrs, frankingTag, participants, timings)
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if err != nil {
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return "", nil, err
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}
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phash := participantListHashV2(allDevices)
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node.Attrs["phash"] = phash
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skMsg := waBinary.Node{
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Tag: "enc",
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Content: ciphertext,
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Attrs: waBinary.Attrs{"v": "3", "type": "skmsg"},
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}
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if msgAttrs.MediaType != "" {
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skMsg.Attrs["mediatype"] = msgAttrs.MediaType
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}
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node.Content = append(node.GetChildren(), skMsg)
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start = time.Now()
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data, err := cli.sendNodeAndGetData(*node)
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timings.Send = time.Since(start)
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if err != nil {
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return "", nil, fmt.Errorf("failed to send message node: %w", err)
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}
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return phash, data, nil
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}
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func (cli *Client) sendDMV3(
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ctx context.Context,
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to,
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ownID types.JID,
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id types.MessageID,
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messageApp []byte,
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msgAttrs messageAttrs,
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frankingTag []byte,
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timings *MessageDebugTimings,
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) ([]byte, string, error) {
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payload := &waMsgTransport.MessageTransport_Payload{
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ApplicationPayload: &waCommon.SubProtocol{
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Payload: messageApp,
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Version: FBMessageApplicationVersion,
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},
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FutureProof: waCommon.FutureProofBehavior_PLACEHOLDER,
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}
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node, allDevices, err := cli.prepareMessageNodeV3(ctx, to, ownID, id, payload, nil, msgAttrs, frankingTag, []types.JID{to, ownID.ToNonAD()}, timings)
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if err != nil {
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return nil, "", err
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}
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start := time.Now()
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data, err := cli.sendNodeAndGetData(*node)
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timings.Send = time.Since(start)
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if err != nil {
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return nil, "", fmt.Errorf("failed to send message node: %w", err)
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}
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return data, participantListHashV2(allDevices), nil
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}
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type messageAttrs struct {
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Type string
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MediaType string
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Edit types.EditAttribute
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DecryptFail events.DecryptFailMode
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PollType string
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}
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func getAttrsFromFBMessage(msg *waConsumerApplication.ConsumerApplication) (attrs messageAttrs) {
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switch payload := msg.GetPayload().GetPayload().(type) {
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case *waConsumerApplication.ConsumerApplication_Payload_Content:
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switch content := payload.Content.GetContent().(type) {
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case *waConsumerApplication.ConsumerApplication_Content_MessageText,
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*waConsumerApplication.ConsumerApplication_Content_ExtendedTextMessage:
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attrs.Type = "text"
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case *waConsumerApplication.ConsumerApplication_Content_ImageMessage:
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attrs.MediaType = "image"
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case *waConsumerApplication.ConsumerApplication_Content_StickerMessage:
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attrs.MediaType = "sticker"
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case *waConsumerApplication.ConsumerApplication_Content_ViewOnceMessage:
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switch content.ViewOnceMessage.GetViewOnceContent().(type) {
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case *waConsumerApplication.ConsumerApplication_ViewOnceMessage_ImageMessage:
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attrs.MediaType = "image"
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case *waConsumerApplication.ConsumerApplication_ViewOnceMessage_VideoMessage:
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attrs.MediaType = "video"
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}
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case *waConsumerApplication.ConsumerApplication_Content_DocumentMessage:
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attrs.MediaType = "document"
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case *waConsumerApplication.ConsumerApplication_Content_AudioMessage:
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if content.AudioMessage.GetPTT() {
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attrs.MediaType = "ptt"
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} else {
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attrs.MediaType = "audio"
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}
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case *waConsumerApplication.ConsumerApplication_Content_VideoMessage:
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// TODO gifPlayback?
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attrs.MediaType = "video"
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case *waConsumerApplication.ConsumerApplication_Content_LocationMessage:
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attrs.MediaType = "location"
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case *waConsumerApplication.ConsumerApplication_Content_LiveLocationMessage:
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attrs.MediaType = "location"
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case *waConsumerApplication.ConsumerApplication_Content_ContactMessage:
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attrs.MediaType = "vcard"
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case *waConsumerApplication.ConsumerApplication_Content_ContactsArrayMessage:
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attrs.MediaType = "contact_array"
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case *waConsumerApplication.ConsumerApplication_Content_PollCreationMessage:
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attrs.PollType = "creation"
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attrs.Type = "poll"
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case *waConsumerApplication.ConsumerApplication_Content_PollUpdateMessage:
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attrs.PollType = "vote"
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attrs.Type = "poll"
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attrs.DecryptFail = events.DecryptFailHide
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case *waConsumerApplication.ConsumerApplication_Content_ReactionMessage:
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attrs.Type = "reaction"
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attrs.DecryptFail = events.DecryptFailHide
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case *waConsumerApplication.ConsumerApplication_Content_EditMessage:
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attrs.Edit = types.EditAttributeMessageEdit
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attrs.DecryptFail = events.DecryptFailHide
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}
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if attrs.MediaType != "" && attrs.Type == "" {
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attrs.Type = "media"
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}
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case *waConsumerApplication.ConsumerApplication_Payload_ApplicationData:
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switch content := payload.ApplicationData.GetApplicationContent().(type) {
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case *waConsumerApplication.ConsumerApplication_ApplicationData_Revoke:
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if content.Revoke.GetKey().GetFromMe() {
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attrs.Edit = types.EditAttributeSenderRevoke
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} else {
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attrs.Edit = types.EditAttributeAdminRevoke
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}
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attrs.DecryptFail = events.DecryptFailHide
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}
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case *waConsumerApplication.ConsumerApplication_Payload_Signal:
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case *waConsumerApplication.ConsumerApplication_Payload_SubProtocol:
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}
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if attrs.Type == "" {
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attrs.Type = "text"
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}
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return
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}
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func (cli *Client) prepareMessageNodeV3(
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ctx context.Context,
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to,
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ownID types.JID,
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id types.MessageID,
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payload *waMsgTransport.MessageTransport_Payload,
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skdm *waMsgTransport.MessageTransport_Protocol_Ancillary_SenderKeyDistributionMessage,
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msgAttrs messageAttrs,
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frankingTag []byte,
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participants []types.JID,
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timings *MessageDebugTimings,
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) (*waBinary.Node, []types.JID, error) {
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start := time.Now()
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allDevices, err := cli.GetUserDevicesContext(ctx, participants)
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timings.GetDevices = time.Since(start)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to get device list: %w", err)
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}
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encAttrs := waBinary.Attrs{}
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attrs := waBinary.Attrs{
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"id": id,
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"type": msgAttrs.Type,
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"to": to,
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}
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// Only include mediatype on DMs, for groups it's in the skmsg node
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if payload != nil && msgAttrs.MediaType != "" {
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encAttrs["mediatype"] = msgAttrs.MediaType
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}
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if msgAttrs.Edit != "" {
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attrs["edit"] = string(msgAttrs.Edit)
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}
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if msgAttrs.DecryptFail != "" {
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encAttrs["decrypt-fail"] = string(msgAttrs.DecryptFail)
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}
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dsm := &waMsgTransport.MessageTransport_Protocol_Integral_DeviceSentMessage{
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DestinationJID: to.String(),
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Phash: "",
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}
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start = time.Now()
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participantNodes := cli.encryptMessageForDevicesV3(ctx, allDevices, ownID, id, payload, skdm, dsm, encAttrs)
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timings.PeerEncrypt = time.Since(start)
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content := make([]waBinary.Node, 0, 4)
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content = append(content, waBinary.Node{
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Tag: "participants",
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Content: participantNodes,
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})
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metaAttrs := make(waBinary.Attrs)
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if msgAttrs.PollType != "" {
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metaAttrs["polltype"] = msgAttrs.PollType
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}
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if msgAttrs.DecryptFail != "" {
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metaAttrs["decrypt-fail"] = string(msgAttrs.DecryptFail)
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}
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if len(metaAttrs) > 0 {
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content = append(content, waBinary.Node{
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Tag: "meta",
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Attrs: metaAttrs,
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})
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}
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traceRequestID := uuid.New()
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content = append(content, waBinary.Node{
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Tag: "franking",
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Content: []waBinary.Node{{
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Tag: "franking_tag",
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Content: frankingTag,
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}},
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}, waBinary.Node{
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Tag: "trace",
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Content: []waBinary.Node{{
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Tag: "request_id",
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Content: traceRequestID[:],
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}},
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})
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return &waBinary.Node{
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Tag: "message",
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Attrs: attrs,
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Content: content,
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}, allDevices, nil
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}
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|
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func (cli *Client) encryptMessageForDevicesV3(
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ctx context.Context,
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allDevices []types.JID,
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ownID types.JID,
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id string,
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payload *waMsgTransport.MessageTransport_Payload,
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skdm *waMsgTransport.MessageTransport_Protocol_Ancillary_SenderKeyDistributionMessage,
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dsm *waMsgTransport.MessageTransport_Protocol_Integral_DeviceSentMessage,
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encAttrs waBinary.Attrs,
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) []waBinary.Node {
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participantNodes := make([]waBinary.Node, 0, len(allDevices))
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var retryDevices []types.JID
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for _, jid := range allDevices {
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var dsmForDevice *waMsgTransport.MessageTransport_Protocol_Integral_DeviceSentMessage
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if jid.User == ownID.User {
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if jid == ownID {
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continue
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}
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dsmForDevice = dsm
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}
|
|
encrypted, err := cli.encryptMessageForDeviceAndWrapV3(payload, skdm, dsmForDevice, jid, nil, encAttrs)
|
|
if errors.Is(err, ErrNoSession) {
|
|
retryDevices = append(retryDevices, jid)
|
|
continue
|
|
} else if err != nil {
|
|
cli.Log.Warnf("Failed to encrypt %s for %s: %v", id, jid, err)
|
|
continue
|
|
}
|
|
participantNodes = append(participantNodes, *encrypted)
|
|
}
|
|
if len(retryDevices) > 0 {
|
|
bundles, err := cli.fetchPreKeys(ctx, retryDevices)
|
|
if err != nil {
|
|
cli.Log.Warnf("Failed to fetch prekeys for %v to retry encryption: %v", retryDevices, err)
|
|
} else {
|
|
for _, jid := range retryDevices {
|
|
resp := bundles[jid]
|
|
if resp.err != nil {
|
|
cli.Log.Warnf("Failed to fetch prekey for %s: %v", jid, resp.err)
|
|
continue
|
|
}
|
|
var dsmForDevice *waMsgTransport.MessageTransport_Protocol_Integral_DeviceSentMessage
|
|
if jid.User == ownID.User {
|
|
dsmForDevice = dsm
|
|
}
|
|
encrypted, err := cli.encryptMessageForDeviceAndWrapV3(payload, skdm, dsmForDevice, jid, resp.bundle, encAttrs)
|
|
if err != nil {
|
|
cli.Log.Warnf("Failed to encrypt %s for %s (retry): %v", id, jid, err)
|
|
continue
|
|
}
|
|
participantNodes = append(participantNodes, *encrypted)
|
|
}
|
|
}
|
|
}
|
|
return participantNodes
|
|
}
|
|
|
|
func (cli *Client) encryptMessageForDeviceAndWrapV3(
|
|
payload *waMsgTransport.MessageTransport_Payload,
|
|
skdm *waMsgTransport.MessageTransport_Protocol_Ancillary_SenderKeyDistributionMessage,
|
|
dsm *waMsgTransport.MessageTransport_Protocol_Integral_DeviceSentMessage,
|
|
to types.JID,
|
|
bundle *prekey.Bundle,
|
|
encAttrs waBinary.Attrs,
|
|
) (*waBinary.Node, error) {
|
|
node, err := cli.encryptMessageForDeviceV3(payload, skdm, dsm, to, bundle, encAttrs)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &waBinary.Node{
|
|
Tag: "to",
|
|
Attrs: waBinary.Attrs{"jid": to},
|
|
Content: []waBinary.Node{*node},
|
|
}, nil
|
|
}
|
|
|
|
func (cli *Client) encryptMessageForDeviceV3(
|
|
payload *waMsgTransport.MessageTransport_Payload,
|
|
skdm *waMsgTransport.MessageTransport_Protocol_Ancillary_SenderKeyDistributionMessage,
|
|
dsm *waMsgTransport.MessageTransport_Protocol_Integral_DeviceSentMessage,
|
|
to types.JID,
|
|
bundle *prekey.Bundle,
|
|
extraAttrs waBinary.Attrs,
|
|
) (*waBinary.Node, error) {
|
|
builder := session.NewBuilderFromSignal(cli.Store, to.SignalAddress(), pbSerializer)
|
|
if bundle != nil {
|
|
cli.Log.Debugf("Processing prekey bundle for %s", to)
|
|
err := builder.ProcessBundle(bundle)
|
|
if cli.AutoTrustIdentity && errors.Is(err, signalerror.ErrUntrustedIdentity) {
|
|
cli.Log.Warnf("Got %v error while trying to process prekey bundle for %s, clearing stored identity and retrying", err, to)
|
|
cli.clearUntrustedIdentity(to)
|
|
err = builder.ProcessBundle(bundle)
|
|
}
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to process prekey bundle: %w", err)
|
|
}
|
|
} else if !cli.Store.ContainsSession(to.SignalAddress()) {
|
|
return nil, ErrNoSession
|
|
}
|
|
cipher := session.NewCipher(builder, to.SignalAddress())
|
|
plaintext, err := proto.Marshal(&waMsgTransport.MessageTransport{
|
|
Payload: payload,
|
|
Protocol: &waMsgTransport.MessageTransport_Protocol{
|
|
Integral: &waMsgTransport.MessageTransport_Protocol_Integral{
|
|
Padding: padMessage(nil),
|
|
DSM: dsm,
|
|
},
|
|
Ancillary: &waMsgTransport.MessageTransport_Protocol_Ancillary{
|
|
Skdm: skdm,
|
|
DeviceListMetadata: nil,
|
|
Icdc: nil,
|
|
BackupDirective: nil,
|
|
},
|
|
},
|
|
})
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to marshal message transport: %w", err)
|
|
}
|
|
ciphertext, err := cipher.Encrypt(plaintext)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cipher encryption failed: %w", err)
|
|
}
|
|
|
|
encAttrs := waBinary.Attrs{
|
|
"v": FBMessageVersion,
|
|
"type": "msg",
|
|
}
|
|
if ciphertext.Type() == protocol.PREKEY_TYPE {
|
|
encAttrs["type"] = "pkmsg"
|
|
}
|
|
copyAttrs(extraAttrs, encAttrs)
|
|
|
|
return &waBinary.Node{
|
|
Tag: "enc",
|
|
Attrs: encAttrs,
|
|
Content: ciphertext.Serialize(),
|
|
}, nil
|
|
}
|