Maybe support e2be by default and fix some bugs

crypto.go

@@ -22,6 +22,7 @@ import (
 	"crypto/hmac"
 	"crypto/sha512"
 	"encoding/hex"
+	"fmt"
 	"time"
 
 	"github.com/pkg/errors"
@@ -78,7 +79,7 @@ func (helper *CryptoHelper) Init() error {
 	stateStore := &cryptoStateStore{helper.bridge}
 	helper.store = database.NewSQLCryptoStore(helper.bridge.DB, helper.client.DeviceID)
 	helper.store.UserID = helper.client.UserID
-	helper.store.GhostIDFormat = helper.bridge.Config.Bridge.FormatUsername("%")
+	helper.store.GhostIDFormat = fmt.Sprintf("@%s:%s", helper.bridge.Config.Bridge.FormatUsername("%"), helper.bridge.AS.HomeserverDomain)
 	helper.mach = crypto.NewOlmMachine(helper.client, logger, helper.store, stateStore)
 
 	helper.client.Logger = logger.int.Sub("Bot")

database/cryptostore.go

@@ -211,6 +211,13 @@ func (store *SQLCryptoStore) AddSession(key id.SenderKey, session *crypto.OlmSes
 	return err
 }
 
+func (store *SQLCryptoStore) UpdateSession(key id.SenderKey, session *crypto.OlmSession) error {
+	sessionBytes := session.Internal.Pickle(store.PickleKey)
+	_, err := store.db.Exec("UPDATE crypto_olm_session SET session=$1, last_used=$2 WHERE session_id=$3",
+		sessionBytes, session.UseTime, session.ID())
+	return err
+}
+
 func (store *SQLCryptoStore) PutGroupSession(roomID id.RoomID, senderKey id.SenderKey, sessionID id.SessionID, session *crypto.InboundGroupSession) error {
 	sessionBytes := session.Internal.Pickle(store.PickleKey)
 	forwardingChains := strings.Join(session.ForwardingChains, ",")

database/upgrades/2020-05-09-crypto-store.go

@@ -18,7 +18,7 @@ func init() {
 		}
 		_, err = tx.Exec(`CREATE TABLE crypto_message_index (
 			sender_key CHAR(43),
-			session_id VARCHAR(255),
+			session_id CHAR(43),
 			"index"    INTEGER,
 			event_id   VARCHAR(255) NOT NULL,
 			timestamp  BIGINT       NOT NULL,
@@ -49,11 +49,11 @@ func init() {
 			return err
 		}
 		_, err = tx.Exec(`CREATE TABLE crypto_olm_session (
-			session_id   CHAR(43)     PRIMARY KEY,
-			sender_key   VARCHAR(255) NOT NULL,
-			session      bytea        NOT NULL,
-			created_at   timestamp    NOT NULL,
-			last_used    timestamp    NOT NULL
+			session_id   CHAR(43)  PRIMARY KEY,
+			sender_key   CHAR(43)  NOT NULL,
+			session      bytea     NOT NULL,
+			created_at   timestamp NOT NULL,
+			last_used    timestamp NOT NULL
 		)`)
 		if err != nil {
 			return err

example-config.yaml

@@ -148,6 +148,7 @@ bridge:
         allow: false
         # Default to encryption, force-enable encryption in all portals the bridge creates
         # This will cause the bridge bot to be in private chats for the encryption to work properly.
+        # It is recommended to also set private_chat_portal_meta to true when using this.
         default: false
 
     # Permissions for using the bridge.

go.mod

@@ -15,7 +15,7 @@ require (
 	gopkg.in/yaml.v2 v2.2.8
 	maunium.net/go/mauflag v1.0.0
 	maunium.net/go/maulogger/v2 v2.1.1
-	maunium.net/go/mautrix v0.4.1
+	maunium.net/go/mautrix v0.4.3
 )
 
 replace github.com/Rhymen/go-whatsapp => github.com/tulir/go-whatsapp v0.2.6

go.sum

@@ -88,3 +88,7 @@ maunium.net/go/mautrix v0.4.0 h1:IYfmxCoxR/6UMi92IncsSZeKQbZm8Xa35XIRX814KJ4=
 maunium.net/go/mautrix v0.4.0/go.mod h1:8Y+NqmROJyWYvvP4yPfX9tLM59VCfgE/kcQ0SeX68ho=
 maunium.net/go/mautrix v0.4.1 h1:i2lJNT+TE4AAL3cVKUN4jKVRkujCE/oS8aIsj8+7iNE=
 maunium.net/go/mautrix v0.4.1/go.mod h1:8Y+NqmROJyWYvvP4yPfX9tLM59VCfgE/kcQ0SeX68ho=
+maunium.net/go/mautrix v0.4.2 h1:GBU++Z7o/fLPcEsNMkNOUsnDknwV/MGPQ0BN4ikK6tw=
+maunium.net/go/mautrix v0.4.2/go.mod h1:8Y+NqmROJyWYvvP4yPfX9tLM59VCfgE/kcQ0SeX68ho=
+maunium.net/go/mautrix v0.4.3 h1:fVoJy992TjBEvuK5NeO9fpBh+9JuSFsxaEdGjFp/7h4=
+maunium.net/go/mautrix v0.4.3/go.mod h1:8Y+NqmROJyWYvvP4yPfX9tLM59VCfgE/kcQ0SeX68ho=

matrix.go

@@ -130,6 +130,10 @@ func (mx *MatrixHandler) HandleBotInvite(evt *event.Event) {
 }
 
 func (mx *MatrixHandler) HandleMembership(evt *event.Event) {
+	if _, isPuppet := mx.bridge.ParsePuppetMXID(evt.Sender); evt.Sender == mx.bridge.Bot.UserID || isPuppet {
+		return
+	}
+
 	if mx.bridge.Crypto != nil {
 		mx.bridge.Crypto.HandleMemberEvent(evt)
 	}

portal.go

@@ -725,7 +725,6 @@ func (portal *Portal) CreateMatrixRoom(user *User) error {
 	portal.log.Infoln("Creating Matrix room. Info source:", user.MXID)
 
 	var metadata *whatsappExt.GroupInfo
-	isPrivateChat := false
 	if portal.IsPrivateChat() {
 		puppet := portal.bridge.GetPuppetByJID(portal.Key.JID)
 		if portal.bridge.Config.Bridge.PrivateChatPortalMeta {
@@ -736,7 +735,6 @@ func (portal *Portal) CreateMatrixRoom(user *User) error {
 			portal.Name = ""
 		}
 		portal.Topic = "WhatsApp private chat"
-		isPrivateChat = true
 	} else if portal.IsStatusBroadcastRoom() {
 		portal.Name = "WhatsApp Status Broadcast"
 		portal.Topic = "WhatsApp status updates from your contacts"
@@ -770,13 +768,26 @@ func (portal *Portal) CreateMatrixRoom(user *User) error {
 		invite = portal.bridge.Config.Bridge.Relaybot.InviteUsers
 	}
 
+	if portal.bridge.Config.Bridge.Encryption.Default {
+		initialState = append(initialState, &event.Event{
+			Type: event.StateEncryption,
+			Content: event.Content{
+				Parsed: event.EncryptionEventContent{Algorithm: id.AlgorithmMegolmV1},
+			},
+		})
+		portal.Encrypted = true
+		if portal.IsPrivateChat() {
+			invite = append(invite, portal.bridge.Bot.UserID)
+		}
+	}
+
 	resp, err := intent.CreateRoom(&mautrix.ReqCreateRoom{
 		Visibility:   "private",
 		Name:         portal.Name,
 		Topic:        portal.Topic,
 		Invite:       invite,
 		Preset:       "private_chat",
-		IsDirect:     isPrivateChat,
+		IsDirect:     portal.IsPrivateChat(),
 		InitialState: initialState,
 	})
 	if err != nil {
@@ -784,6 +795,12 @@ func (portal *Portal) CreateMatrixRoom(user *User) error {
 	}
 	portal.MXID = resp.RoomID
 	portal.Update()
+
+	// We set the memberships beforehand to make sure the encryption key exchange in initial backfill knows the users are here.
+	for _, user := range invite {
+		portal.bridge.StateStore.SetMembership(portal.MXID, user, event.MembershipInvite)
+	}
+
 	if metadata != nil {
 		portal.SyncParticipants(metadata)
 	} else {
@@ -796,6 +813,13 @@ func (portal *Portal) CreateMatrixRoom(user *User) error {
 	if portal.IsPrivateChat() {
 		puppet := user.bridge.GetPuppetByJID(portal.Key.JID)
 		user.addPuppetToCommunity(puppet)
+
+		if portal.bridge.Config.Bridge.Encryption.Default {
+			err = portal.bridge.Bot.EnsureJoined(portal.MXID)
+			if err != nil {
+				portal.log.Errorln("Failed to join created portal with bridge bot for e2be:", err)
+			}
+		}
 	}
 	err = portal.FillInitialHistory(user)
 	if err != nil {