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// Copyright 2024 New Vector Ltd.
// Copyright 2017 Vector Creations Ltd
//
// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
// Please see LICENSE files in the repository root for full details.
package routing
import (
"context"
"crypto/ed25519"
"encoding/json"
"fmt"
"net/http"
"github.com/element-hq/dendrite/roomserver/api"
"github.com/element-hq/dendrite/roomserver/types"
"github.com/element-hq/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/gomatrixserverlib/fclient"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/matrix-org/util"
)
// InviteV3 implements /_matrix/federation/v2/invite/{roomID}/{userID}
func InviteV3(
httpReq *http.Request,
request *fclient.FederationRequest,
roomID spec.RoomID,
invitedUser spec.UserID,
cfg *config.FederationAPI,
rsAPI api.FederationRoomserverAPI,
keys gomatrixserverlib.JSONVerifier,
) util.JSONResponse {
inviteReq := fclient.InviteV3Request{}
err := json.Unmarshal(request.Content(), &inviteReq)
if err != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON(err.Error()),
}
}
if !cfg.Matrix.IsLocalServerName(invitedUser.Domain()) {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.InvalidParam("The invited user domain does not belong to this server"),
}
}
input := gomatrixserverlib.HandleInviteV3Input{
HandleInviteInput: gomatrixserverlib.HandleInviteInput{
RoomVersion: inviteReq.RoomVersion(),
RoomID: roomID,
InvitedUser: invitedUser,
KeyID: cfg.Matrix.KeyID,
PrivateKey: cfg.Matrix.PrivateKey,
Verifier: keys,
RoomQuerier: rsAPI,
MembershipQuerier: &api.MembershipQuerier{Roomserver: rsAPI},
StateQuerier: rsAPI.StateQuerier(),
InviteEvent: nil,
StrippedState: inviteReq.InviteRoomState(),
UserIDQuerier: func(roomID spec.RoomID, senderID spec.SenderID) (*spec.UserID, error) {
return rsAPI.QueryUserIDForSender(httpReq.Context(), roomID, senderID)
},
},
InviteProtoEvent: inviteReq.Event(),
GetOrCreateSenderID: func(ctx context.Context, userID spec.UserID, roomID spec.RoomID, roomVersion string) (spec.SenderID, ed25519.PrivateKey, error) {
// assign a roomNID, otherwise we can't create a private key for the user
_, nidErr := rsAPI.AssignRoomNID(ctx, roomID, gomatrixserverlib.RoomVersion(roomVersion))
if nidErr != nil {
return "", nil, nidErr
}
key, keyErr := rsAPI.GetOrCreateUserRoomPrivateKey(ctx, userID, roomID)
if keyErr != nil {
return "", nil, keyErr
}
return spec.SenderIDFromPseudoIDKey(key), key, nil
},
}
event, jsonErr := handleInviteV3(httpReq.Context(), input, rsAPI)
if jsonErr != nil {
return *jsonErr
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: fclient.RespInviteV2{Event: event.JSON()},
}
}
// InviteV2 implements /_matrix/federation/v2/invite/{roomID}/{eventID}
func InviteV2(
httpReq *http.Request,
request *fclient.FederationRequest,
roomID spec.RoomID,
eventID string,
cfg *config.FederationAPI,
rsAPI api.FederationRoomserverAPI,
keys gomatrixserverlib.JSONVerifier,
) util.JSONResponse {
inviteReq := fclient.InviteV2Request{}
err := json.Unmarshal(request.Content(), &inviteReq)
switch e := err.(type) {
case gomatrixserverlib.UnsupportedRoomVersionError:
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.UnsupportedRoomVersion(
fmt.Sprintf("Room version %q is not supported by this server.", e.Version),
),
}
case gomatrixserverlib.BadJSONError:
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON(err.Error()),
}
case nil:
if inviteReq.Event().StateKey() == nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON("The invite event has no state key"),
}
}
invitedUser, userErr := spec.NewUserID(*inviteReq.Event().StateKey(), true)
if userErr != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.InvalidParam("The user ID is invalid"),
}
}
if !cfg.Matrix.IsLocalServerName(invitedUser.Domain()) {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.InvalidParam("The invited user domain does not belong to this server"),
}
}
if inviteReq.Event().EventID() != eventID {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON("The event ID in the request path must match the event ID in the invite event JSON"),
}
}
input := gomatrixserverlib.HandleInviteInput{
RoomVersion: inviteReq.RoomVersion(),
RoomID: roomID,
InvitedUser: *invitedUser,
KeyID: cfg.Matrix.KeyID,
PrivateKey: cfg.Matrix.PrivateKey,
Verifier: keys,
RoomQuerier: rsAPI,
MembershipQuerier: &api.MembershipQuerier{Roomserver: rsAPI},
StateQuerier: rsAPI.StateQuerier(),
InviteEvent: inviteReq.Event(),
StrippedState: inviteReq.InviteRoomState(),
UserIDQuerier: func(roomID spec.RoomID, senderID spec.SenderID) (*spec.UserID, error) {
return rsAPI.QueryUserIDForSender(httpReq.Context(), roomID, senderID)
},
}
event, jsonErr := handleInvite(httpReq.Context(), input, rsAPI)
if jsonErr != nil {
return *jsonErr
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: fclient.RespInviteV2{Event: event.JSON()},
}
default:
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.NotJSON("The request body could not be decoded into an invite request. " + err.Error()),
}
}
}
// InviteV1 implements /_matrix/federation/v1/invite/{roomID}/{eventID}
func InviteV1(
httpReq *http.Request,
request *fclient.FederationRequest,
roomID spec.RoomID,
eventID string,
cfg *config.FederationAPI,
rsAPI api.FederationRoomserverAPI,
keys gomatrixserverlib.JSONVerifier,
) util.JSONResponse {
roomVer := gomatrixserverlib.RoomVersionV1
body := request.Content()
// roomVer is hardcoded to v1 so we know we won't panic on Must
event, err := gomatrixserverlib.MustGetRoomVersion(roomVer).NewEventFromTrustedJSON(body, false)
switch err.(type) {
case gomatrixserverlib.BadJSONError:
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON(err.Error()),
}
case nil:
default:
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.NotJSON("The request body could not be decoded into an invite v1 request. " + err.Error()),
}
}
var strippedState []gomatrixserverlib.InviteStrippedState
if jsonErr := json.Unmarshal(event.Unsigned(), &strippedState); jsonErr != nil {
// just warn, they may not have added any.
util.GetLogger(httpReq.Context()).Warnf("failed to extract stripped state from invite event")
}
if event.StateKey() == nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON("The invite event has no state key"),
}
}
invitedUser, err := spec.NewUserID(*event.StateKey(), true)
if err != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.InvalidParam("The user ID is invalid"),
}
}
if !cfg.Matrix.IsLocalServerName(invitedUser.Domain()) {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.InvalidParam("The invited user domain does not belong to this server"),
}
}
if event.EventID() != eventID {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON("The event ID in the request path must match the event ID in the invite event JSON"),
}
}
input := gomatrixserverlib.HandleInviteInput{
RoomVersion: roomVer,
RoomID: roomID,
InvitedUser: *invitedUser,
KeyID: cfg.Matrix.KeyID,
PrivateKey: cfg.Matrix.PrivateKey,
Verifier: keys,
RoomQuerier: rsAPI,
MembershipQuerier: &api.MembershipQuerier{Roomserver: rsAPI},
StateQuerier: rsAPI.StateQuerier(),
InviteEvent: event,
StrippedState: strippedState,
UserIDQuerier: func(roomID spec.RoomID, senderID spec.SenderID) (*spec.UserID, error) {
return rsAPI.QueryUserIDForSender(httpReq.Context(), roomID, senderID)
},
}
event, jsonErr := handleInvite(httpReq.Context(), input, rsAPI)
if jsonErr != nil {
return *jsonErr
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: fclient.RespInvite{Event: event.JSON()},
}
}
func handleInvite(ctx context.Context, input gomatrixserverlib.HandleInviteInput, rsAPI api.FederationRoomserverAPI) (gomatrixserverlib.PDU, *util.JSONResponse) {
inviteEvent, err := gomatrixserverlib.HandleInvite(ctx, input)
return handleInviteResult(ctx, inviteEvent, err, rsAPI)
}
func handleInviteV3(ctx context.Context, input gomatrixserverlib.HandleInviteV3Input, rsAPI api.FederationRoomserverAPI) (gomatrixserverlib.PDU, *util.JSONResponse) {
inviteEvent, err := gomatrixserverlib.HandleInviteV3(ctx, input)
return handleInviteResult(ctx, inviteEvent, err, rsAPI)
}
func handleInviteResult(ctx context.Context, inviteEvent gomatrixserverlib.PDU, err error, rsAPI api.FederationRoomserverAPI) (gomatrixserverlib.PDU, *util.JSONResponse) {
switch e := err.(type) {
case nil:
case spec.InternalServerError:
util.GetLogger(ctx).WithError(err)
return nil, &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
case spec.MatrixError:
util.GetLogger(ctx).WithError(err)
code := http.StatusInternalServerError
switch e.ErrCode {
case spec.ErrorForbidden:
code = http.StatusForbidden
case spec.ErrorUnsupportedRoomVersion:
fallthrough // http.StatusBadRequest
case spec.ErrorBadJSON:
code = http.StatusBadRequest
}
return nil, &util.JSONResponse{
Code: code,
JSON: e,
}
default:
util.GetLogger(ctx).WithError(err)
return nil, &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.Unknown("unknown error"),
}
}
headeredInvite := &types.HeaderedEvent{PDU: inviteEvent}
if err = rsAPI.HandleInvite(ctx, headeredInvite); err != nil {
util.GetLogger(ctx).WithError(err).Error("HandleInvite failed")
return nil, &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
return inviteEvent, nil
}
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