Handle group changes properly (mautrix#432)

Handle the actual changes instead of resyncing the whole group when something changes

config/bridge.go

@@ -48,6 +48,7 @@ type BridgeConfig struct {
 	MessageErrorNotices     bool `yaml:"message_error_notices"`
 	SyncDirectChatList      bool `yaml:"sync_direct_chat_list"`
 	ResendBridgeInfo        bool `yaml:"resend_bridge_info"`
+	PublicPortals           bool `yaml:"public_portals"`
 	CaptionInMessage        bool `yaml:"caption_in_message"`
 	FederateRooms           bool `yaml:"federate_rooms"`
 

config/upgrade.go

@@ -93,6 +93,7 @@ func DoUpgrade(helper *up.Helper) {
 	helper.Copy(up.Bool, "bridge", "message_error_notices")
 	helper.Copy(up.Bool, "bridge", "sync_direct_chat_list")
 	helper.Copy(up.Bool, "bridge", "resend_bridge_info")
+	helper.Copy(up.Bool, "bridge", "public_portals")
 	helper.Copy(up.Bool, "bridge", "caption_in_message")
 	helper.Copy(up.Bool, "bridge", "federate_rooms")
 	helper.Copy(up.Map, "bridge", "double_puppet_server_map")

example-config.yaml

@@ -131,6 +131,9 @@ bridge:
     # Set this to true to tell the bridge to re-send m.bridge events to all rooms on the next run.
     # This field will automatically be changed back to false after it, except if the config file is not writable.
     resend_bridge_info: false
+    # Whether or not to make portals of groups that don't need approval of an admin to join by invite
+    # link publicly joinable on Matrix.
+    public_portals: false
     # Send captions in the same message as images. This will send data compatible with both MSC2530.
     # This is currently not supported in most clients.
     caption_in_message: false

pkg/libsignalgo/verifysignature.go

@@ -0,0 +1,46 @@
+// mautrix-signal - A Matrix-signal puppeting bridge.
+// Copyright (C) 2023 Scott Weber
+//
+// 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 libsignalgo
+
+/*
+#cgo LDFLAGS: -lsignal_ffi -ldl -lm
+#include "./libsignal-ffi.h"
+#include <stdlib.h>
+*/
+import "C"
+import (
+	"runtime"
+	"unsafe"
+)
+
+type NotarySignature [C.SignalSIGNATURE_LEN]byte
+
+func ServerPublicParamsVerifySignature(
+	serverPublicParams ServerPublicParams,
+	messageBytes []byte,
+	NotarySignature NotarySignature,
+) error {
+	c_notarySignature := (*[C.SignalSIGNATURE_LEN]C.uint8_t)(unsafe.Pointer(&NotarySignature[0]))
+	c_serverPublicParams := (*[C.SignalSERVER_PUBLIC_PARAMS_LEN]C.uchar)(unsafe.Pointer(&serverPublicParams[0]))
+	signalFfiError := C.signal_server_public_params_verify_signature(
+		c_serverPublicParams,
+		BytesToBuffer(messageBytes),
+		c_notarySignature,
+	)
+	runtime.KeepAlive(messageBytes)
+	return wrapError(signalFfiError)
+}