mautrix-whatsapp/provisioning.go
2021-12-09 15:57:26 +02:00

354 lines
10 KiB
Go

// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
// Copyright (C) 2021 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"bufio"
"context"
"encoding/json"
"errors"
"fmt"
"net"
"net/http"
"strings"
"time"
"github.com/gorilla/websocket"
"go.mau.fi/whatsmeow"
log "maunium.net/go/maulogger/v2"
"maunium.net/go/mautrix/id"
)
type ProvisioningAPI struct {
bridge *Bridge
log log.Logger
}
func (prov *ProvisioningAPI) Init() {
prov.log = prov.bridge.Log.Sub("Provisioning")
prov.log.Debugln("Enabling provisioning API at", prov.bridge.Config.AppService.Provisioning.Prefix)
r := prov.bridge.AS.Router.PathPrefix(prov.bridge.Config.AppService.Provisioning.Prefix).Subrouter()
r.Use(prov.AuthMiddleware)
r.HandleFunc("/ping", prov.Ping).Methods(http.MethodGet)
r.HandleFunc("/login", prov.Login).Methods(http.MethodGet)
r.HandleFunc("/logout", prov.Logout).Methods(http.MethodPost)
r.HandleFunc("/delete_session", prov.DeleteSession).Methods(http.MethodPost)
r.HandleFunc("/disconnect", prov.Disconnect).Methods(http.MethodPost)
r.HandleFunc("/reconnect", prov.Reconnect).Methods(http.MethodPost)
prov.bridge.AS.Router.HandleFunc("/_matrix/app/com.beeper.asmux/ping", prov.BridgeStatePing).Methods(http.MethodPost)
prov.bridge.AS.Router.HandleFunc("/_matrix/app/com.beeper.bridge_state", prov.BridgeStatePing).Methods(http.MethodPost)
// Deprecated, just use /disconnect
r.HandleFunc("/delete_connection", prov.Disconnect).Methods(http.MethodPost)
}
type responseWrap struct {
http.ResponseWriter
statusCode int
}
var _ http.Hijacker = (*responseWrap)(nil)
func (rw *responseWrap) WriteHeader(statusCode int) {
rw.ResponseWriter.WriteHeader(statusCode)
rw.statusCode = statusCode
}
func (rw *responseWrap) Hijack() (net.Conn, *bufio.ReadWriter, error) {
hijacker, ok := rw.ResponseWriter.(http.Hijacker)
if !ok {
return nil, nil, errors.New("response does not implement http.Hijacker")
}
return hijacker.Hijack()
}
func (prov *ProvisioningAPI) AuthMiddleware(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
auth := r.Header.Get("Authorization")
if len(auth) == 0 && strings.HasSuffix(r.URL.Path, "/login") {
authParts := strings.Split(r.Header.Get("Sec-WebSocket-Protocol"), ",")
for _, part := range authParts {
part = strings.TrimSpace(part)
if strings.HasPrefix(part, "net.maunium.whatsapp.auth-") {
auth = part[len("net.maunium.whatsapp.auth-"):]
break
}
}
} else if strings.HasPrefix(auth, "Bearer ") {
auth = auth[len("Bearer "):]
}
if auth != prov.bridge.Config.AppService.Provisioning.SharedSecret {
jsonResponse(w, http.StatusForbidden, map[string]interface{}{
"error": "Invalid auth token",
"errcode": "M_FORBIDDEN",
})
return
}
userID := r.URL.Query().Get("user_id")
user := prov.bridge.GetUserByMXID(id.UserID(userID))
start := time.Now()
wWrap := &responseWrap{w, 200}
h.ServeHTTP(wWrap, r.WithContext(context.WithValue(r.Context(), "user", user)))
duration := time.Now().Sub(start).Seconds()
prov.log.Infofln("%s %s from %s took %.2f seconds and returned status %d", r.Method, r.URL.Path, user.MXID, duration, wWrap.statusCode)
})
}
type Error struct {
Success bool `json:"success"`
Error string `json:"error"`
ErrCode string `json:"errcode"`
}
type Response struct {
Success bool `json:"success"`
Status string `json:"status"`
}
func (prov *ProvisioningAPI) DeleteSession(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Session == nil && user.Client == nil {
jsonResponse(w, http.StatusNotFound, Error{
Error: "Nothing to purge: no session information stored and no active connection.",
ErrCode: "no session",
})
return
}
user.DeleteConnection()
user.DeleteSession()
jsonResponse(w, http.StatusOK, Response{true, "Session information purged"})
user.removeFromJIDMap(StateLoggedOut)
}
func (prov *ProvisioningAPI) Disconnect(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Client == nil {
jsonResponse(w, http.StatusNotFound, Error{
Error: "You don't have a WhatsApp connection.",
ErrCode: "no connection",
})
return
}
user.DeleteConnection()
jsonResponse(w, http.StatusOK, Response{true, "Disconnected from WhatsApp"})
user.sendBridgeState(BridgeState{StateEvent: StateBadCredentials, Error: WANotConnected})
}
func (prov *ProvisioningAPI) Reconnect(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Client == nil {
if user.Session == nil {
jsonResponse(w, http.StatusForbidden, Error{
Error: "No existing connection and no session. Please log in first.",
ErrCode: "no session",
})
} else {
user.Connect()
jsonResponse(w, http.StatusAccepted, Response{true, "Created connection to WhatsApp."})
}
} else {
user.DeleteConnection()
user.sendBridgeState(BridgeState{StateEvent: StateTransientDisconnect, Error: WANotConnected})
user.Connect()
jsonResponse(w, http.StatusAccepted, Response{true, "Restarted connection to WhatsApp"})
}
}
func (prov *ProvisioningAPI) Ping(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
wa := map[string]interface{}{
"has_session": user.Session != nil,
"management_room": user.ManagementRoom,
"conn": nil,
}
if !user.JID.IsEmpty() {
wa["jid"] = user.JID.String()
wa["phone"] = "+" + user.JID.User
wa["device"] = user.JID.Device
}
if user.Client != nil {
wa["conn"] = map[string]interface{}{
"is_connected": user.Client.IsConnected(),
"is_logged_in": user.Client.IsLoggedIn(),
}
}
resp := map[string]interface{}{
"mxid": user.MXID,
"admin": user.Admin,
"whitelisted": user.Whitelisted,
"relay_whitelisted": user.RelayWhitelisted,
"whatsapp": wa,
}
jsonResponse(w, http.StatusOK, resp)
}
func jsonResponse(w http.ResponseWriter, status int, response interface{}) {
w.Header().Add("Content-Type", "application/json")
w.WriteHeader(status)
_ = json.NewEncoder(w).Encode(response)
}
func (prov *ProvisioningAPI) Logout(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Session == nil {
jsonResponse(w, http.StatusNotFound, Error{
Error: "You're not logged in",
ErrCode: "not logged in",
})
return
}
force := strings.ToLower(r.URL.Query().Get("force")) != "false"
if user.Client == nil {
if !force {
jsonResponse(w, http.StatusNotFound, Error{
Error: "You're not connected",
ErrCode: "not connected",
})
}
} else {
err := user.Client.Logout()
if err != nil {
user.log.Warnln("Error while logging out:", err)
if !force {
jsonResponse(w, http.StatusInternalServerError, Error{
Error: fmt.Sprintf("Unknown error while logging out: %v", err),
ErrCode: err.Error(),
})
return
}
} else {
user.Session = nil
}
user.DeleteConnection()
}
user.bridge.Metrics.TrackConnectionState(user.JID, false)
user.removeFromJIDMap(StateLoggedOut)
user.DeleteSession()
jsonResponse(w, http.StatusOK, Response{true, "Logged out successfully."})
}
var upgrader = websocket.Upgrader{
CheckOrigin: func(r *http.Request) bool {
return true
},
Subprotocols: []string{"net.maunium.whatsapp.login"},
}
func (prov *ProvisioningAPI) Login(w http.ResponseWriter, r *http.Request) {
userID := r.URL.Query().Get("user_id")
user := prov.bridge.GetUserByMXID(id.UserID(userID))
c, err := upgrader.Upgrade(w, r, nil)
if err != nil {
prov.log.Errorln("Failed to upgrade connection to websocket:", err)
return
}
defer func() {
err := c.Close()
if err != nil {
user.log.Debugln("Error closing websocket:", err)
}
}()
go func() {
// Read everything so SetCloseHandler() works
for {
_, _, err = c.ReadMessage()
if err != nil {
break
}
}
}()
ctx, cancel := context.WithCancel(context.Background())
c.SetCloseHandler(func(code int, text string) error {
user.log.Debugfln("Login websocket closed (%d), cancelling login", code)
cancel()
return nil
})
qrChan, err := user.Login(ctx)
if err != nil {
user.log.Errorf("Failed to log in from provisioning API:", err)
if errors.Is(err, ErrAlreadyLoggedIn) {
go user.Connect()
_ = c.WriteJSON(Error{
Error: "You're already logged into WhatsApp",
ErrCode: "already logged in",
})
} else {
_ = c.WriteJSON(Error{
Error: "Failed to connect to WhatsApp",
ErrCode: "connection error",
})
}
}
user.log.Debugln("Started login via provisioning API")
for {
select {
case evt := <-qrChan:
switch evt.Event {
case whatsmeow.QRChannelSuccess.Event:
jid := user.Client.Store.ID
user.log.Debugln("Successful login as", jid, "via provisioning API")
_ = c.WriteJSON(map[string]interface{}{
"success": true,
"jid": jid,
"phone": fmt.Sprintf("+%s", jid.User),
})
case whatsmeow.QRChannelTimeout.Event:
user.log.Debugln("Login via provisioning API timed out")
_ = c.WriteJSON(Error{
Error: "QR code scan timed out. Please try again.",
ErrCode: "login timed out",
})
case whatsmeow.QRChannelErrUnexpectedEvent.Event:
user.log.Debugln("Login via provisioning API failed due to unexpected event")
_ = c.WriteJSON(Error{
Error: "Got unexpected event while waiting for QRs, perhaps you're already logged in?",
ErrCode: "unexpected event",
})
case whatsmeow.QRChannelScannedWithoutMultidevice.Event:
_ = c.WriteJSON(Error{
Error: "Please enable the WhatsApp multidevice beta and scan the QR code again.",
ErrCode: "multidevice not enabled",
})
continue
case "error":
_ = c.WriteJSON(Error{
Error: "Fatal error while logging in",
ErrCode: "fatal error",
})
case "code":
_ = c.WriteJSON(map[string]interface{}{
"code": evt.Code,
"timeout": int(evt.Timeout.Seconds()),
})
continue
}
return
case <-ctx.Done():
return
}
}
}