Add option to automatically enable custom puppeting with shared secret login

config/bridge.go

@@ -55,6 +55,7 @@ type BridgeConfig struct {
 	SyncChatMaxAge     uint64 `yaml:"sync_max_chat_age"`
 
 	SyncWithCustomPuppets bool `yaml:"sync_with_custom_puppets"`
+	LoginSharedSecret string `yaml:"login_shared_secret"`
 
 	InviteOwnPuppetForBackfilling bool `yaml:"invite_own_puppet_for_backfilling"`
 	PrivateChatPortalMeta         bool `yaml:"private_chat_portal_meta"`
@@ -91,6 +92,7 @@ func (bc *BridgeConfig) setDefaults() {
 	bc.SyncChatMaxAge = 259200
 
 	bc.SyncWithCustomPuppets = true
+	bc.LoginSharedSecret = ""
 
 	bc.InviteOwnPuppetForBackfilling = true
 	bc.PrivateChatPortalMeta = false

custompuppet.go

@@ -17,6 +17,9 @@
 package main
 
 import (
+	"crypto/hmac"
+	"crypto/sha512"
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"strings"
@@ -58,6 +61,22 @@ func (puppet *Puppet) SwitchCustomMXID(accessToken string, mxid string) error {
 	return nil
 }
 
+func (puppet *Puppet) loginWithSharedSecret(mxid string) (string, error) {
+	mac := hmac.New(sha512.New, []byte(puppet.bridge.Config.Bridge.LoginSharedSecret))
+	mac.Write([]byte(mxid))
+	resp, err := puppet.bridge.AS.BotClient().Login(&mautrix.ReqLogin{
+		Type:                     "m.login.password",
+		Identifier:               mautrix.UserIdentifier{Type: "m.id.user", User: mxid},
+		Password:                 hex.EncodeToString(mac.Sum(nil)),
+		DeviceID:                 "WhatsApp Bridge",
+		InitialDeviceDisplayName: "WhatsApp Bridge",
+	})
+	if err != nil {
+		return "", err
+	}
+	return resp.AccessToken, nil
+}
+
 func (puppet *Puppet) newCustomIntent() (*appservice.IntentAPI, error) {
 	if len(puppet.CustomMXID) == 0 {
 		return nil, ErrNoCustomMXID

example-config.yaml

@@ -102,6 +102,12 @@ bridge:
     # Whether or not to sync with custom puppets to receive EDUs that
     # are not normally sent to appservices.
     sync_with_custom_puppets: true
+    # Shared secret for https://github.com/devture/matrix-synapse-shared-secret-auth
+    #
+    # If set, custom puppets will be enabled automatically for local users
+    # instead of users having to find an access token and run `login-matrix`
+    # manually.
+    login_shared_secret: null
 
     # Whether or not to invite own WhatsApp user's Matrix puppet into private
     # chat portals when backfilling if needed.

go.mod

@@ -12,8 +12,8 @@ require (
 	gopkg.in/yaml.v2 v2.2.2
 	maunium.net/go/mauflag v1.0.0
 	maunium.net/go/maulogger/v2 v2.0.0
-	maunium.net/go/mautrix v0.1.0-alpha.3.0.20191110191816-178ce1f1561d
-	maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20191110192030-cd699619a163
+	maunium.net/go/mautrix v0.1.0-alpha.3.0.20191230181907-055c3acd81cd
+	maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20191230181948-bf5d2e16a792
 )
 
 replace (

go.sum

@@ -45,6 +45,7 @@ github.com/tulir/go-whatsapp v0.0.2-0.20190830212741-33ca6ee47cf5 h1:0pUczFGOo4s
 github.com/tulir/go-whatsapp v0.0.2-0.20190830212741-33ca6ee47cf5/go.mod h1:u3Hdptbz3iB5y/NEoSKgsp9hBzUlm0A5OrLMVdENAX8=
 github.com/tulir/go-whatsapp v0.0.2-0.20190903182221-4e1a838ff3ba h1:exEcedSHn0qEZ1iwNwFF5brEuflhMScjFyyzmxUA+og=
 github.com/tulir/go-whatsapp v0.0.2-0.20190903182221-4e1a838ff3ba/go.mod h1:u3Hdptbz3iB5y/NEoSKgsp9hBzUlm0A5OrLMVdENAX8=
+github.com/tulir/go-whatsapp v0.0.2-0.20191109203156-c477dae1c7e9 h1:WyLOadcpkAvoyaGfUvBgj/mTHetzliBGFioEEtM+Ac8=
 github.com/tulir/go-whatsapp v0.0.2-0.20191109203156-c477dae1c7e9/go.mod h1:ustkccVUt0hOuKikjFb6b4Eray6At5djkcKYYu4+Lco=
 golang.org/x/crypto v0.0.0-20190131182504-b8fe1690c613/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
@@ -74,6 +75,8 @@ maunium.net/go/mautrix v0.1.0-alpha.3.0.20190622085722-6406f15cb8e3/go.mod h1:O+
 maunium.net/go/mautrix v0.1.0-alpha.3.0.20190825132810-9d870654e9d2 h1:0iVxLLAOSBqtJqhIjW9EbblMsaSYoCJRo5mHPZnytUk=
 maunium.net/go/mautrix v0.1.0-alpha.3.0.20190825132810-9d870654e9d2/go.mod h1:O+QWJP3H7BZEzIBSrECKpnpRnEKBwaoWVEu/yZwVwxg=
 maunium.net/go/mautrix v0.1.0-alpha.3.0.20191110191816-178ce1f1561d/go.mod h1:O+QWJP3H7BZEzIBSrECKpnpRnEKBwaoWVEu/yZwVwxg=
+maunium.net/go/mautrix v0.1.0-alpha.3.0.20191230181907-055c3acd81cd h1:stoHlgxDA3AKrULnJo1Ubmrb/Yk7iz2ucb0JA3YNMDM=
+maunium.net/go/mautrix v0.1.0-alpha.3.0.20191230181907-055c3acd81cd/go.mod h1:O+QWJP3H7BZEzIBSrECKpnpRnEKBwaoWVEu/yZwVwxg=
 maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20190618052224-6e6c9bb47548 h1:ni1nqs+2AOO+g1ND6f2W0pMcb6sIDVqzerXosO+pI2g=
 maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20190618052224-6e6c9bb47548/go.mod h1:yVWU0gvIHIXClgyVnShiufiDksFbFrBqHG9lDAYcmGI=
 maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20190822210104-3e49344e186b h1:/03X0PPgtk4pqXcdH86xMzOl891whG5A1hFXQ+xXons=
@@ -87,3 +90,5 @@ maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20190830063827-e7dcd7e42e7c/g
 maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20190901152202-40639f5932be h1:sSBx9AGR4iYHRFwljqNwxXFtbY2bKLJHgI9B4whAU8I=
 maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20190901152202-40639f5932be/go.mod h1:FJRRpH5+p3wCfEt6u/3kMeu9aGX/pk2PqtvjRDRW74w=
 maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20191110192030-cd699619a163/go.mod h1:ST7YYCoHtFC4c7/Iga8W5wwKXyxjwVh4DlsnyIU6rYw=
+maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20191230181948-bf5d2e16a792 h1:7Lxt/h4TnC6Z9PfnggdD4e7IasxdnYzrXmtTmedbSpU=
+maunium.net/go/mautrix-appservice v0.1.0-alpha.3.0.20191230181948-bf5d2e16a792/go.mod h1:ek/PBMaq4AxuI5NP+XAq5Ma2u+ZTjUUaUr6dh4w9zSw=

user.go

@@ -365,9 +365,35 @@ func (user *User) PostLogin() {
 	go user.intPostLogin()
 }
 
+func (user *User) tryAutomaticDoublePuppeting(){
+	if len(user.bridge.Config.Bridge.LoginSharedSecret) == 0 {
+		// Automatic login not enabled
+		return
+	}
+
+	puppet := user.bridge.GetPuppetByJID(user.JID)
+	if len(puppet.CustomMXID) > 0 {
+		// Custom puppet already enabled
+		return
+	}
+	accessToken, err := puppet.loginWithSharedSecret(user.MXID)
+	if err != nil {
+		user.log.Warnln("Failed to login with shared secret:", err)
+		return
+	}
+	err = puppet.SwitchCustomMXID(accessToken, user.MXID)
+	if err != nil {
+		puppet.log.Warnln("Failed to switch to auto-logined custom puppet:", err)
+		return
+	}
+	user.log.Infoln("Successfully automatically enabled custom puppet")
+}
+
 func (user *User) intPostLogin() {
-	user.createCommunity()
 	defer user.syncLock.Unlock()
+	user.createCommunity()
+	user.tryAutomaticDoublePuppeting()
+
 
 	select {
 	case <-user.chatListReceived: