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dendrite/clientapi/routing/key_backup.go

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// Copyright 2021 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package routing
import (
"encoding/json"
"fmt"
"net/http"
"github.com/matrix-org/dendrite/clientapi/httputil"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
userapi "github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/util"
)
type keyBackupVersion struct {
Algorithm string `json:"algorithm"`
AuthData json.RawMessage `json:"auth_data"`
}
type keyBackupVersionCreateResponse struct {
Version string `json:"version"`
}
type keyBackupVersionResponse struct {
Algorithm string `json:"algorithm"`
AuthData json.RawMessage `json:"auth_data"`
Count int64 `json:"count"`
ETag string `json:"etag"`
Version string `json:"version"`
}
type keyBackupSessionRequest struct {
Rooms map[string]struct {
Sessions map[string]userapi.KeyBackupSession `json:"sessions"`
} `json:"rooms"`
}
type keyBackupSessionResponse struct {
Count int64 `json:"count"`
ETag string `json:"etag"`
}
// Create a new key backup. Request must contain a `keyBackupVersion`. Returns a `keyBackupVersionCreateResponse`.
// Implements POST /_matrix/client/r0/room_keys/version
func CreateKeyBackupVersion(req *http.Request, userAPI userapi.ClientUserAPI, device *userapi.Device) util.JSONResponse {
var kb keyBackupVersion
resErr := httputil.UnmarshalJSONRequest(req, &kb)
if resErr != nil {
return *resErr
}
var performKeyBackupResp userapi.PerformKeyBackupResponse
if err := userAPI.PerformKeyBackup(req.Context(), &userapi.PerformKeyBackupRequest{
UserID: device.UserID,
Version: "",
AuthData: kb.AuthData,
Algorithm: kb.Algorithm,
}, &performKeyBackupResp); err != nil {
return jsonerror.InternalServerError()
}
if performKeyBackupResp.Error != "" {
if performKeyBackupResp.BadInput {
return util.JSONResponse{
Code: 400,
JSON: jsonerror.InvalidArgumentValue(performKeyBackupResp.Error),
}
}
return util.ErrorResponse(fmt.Errorf("PerformKeyBackup: %s", performKeyBackupResp.Error))
}
return util.JSONResponse{
Code: 200,
JSON: keyBackupVersionCreateResponse{
Version: performKeyBackupResp.Version,
},
}
}
// KeyBackupVersion returns the key backup version specified. If `version` is empty, the latest `keyBackupVersionResponse` is returned.
// Implements GET /_matrix/client/r0/room_keys/version and GET /_matrix/client/r0/room_keys/version/{version}
func KeyBackupVersion(req *http.Request, userAPI userapi.ClientUserAPI, device *userapi.Device, version string) util.JSONResponse {
var queryResp userapi.QueryKeyBackupResponse
userAPI.QueryKeyBackup(req.Context(), &userapi.QueryKeyBackupRequest{
UserID: device.UserID,
Version: version,
}, &queryResp)
if queryResp.Error != "" {
return util.ErrorResponse(fmt.Errorf("QueryKeyBackup: %s", queryResp.Error))
}
if !queryResp.Exists {
return util.JSONResponse{
Code: 404,
JSON: jsonerror.NotFound("version not found"),
}
}
return util.JSONResponse{
Code: 200,
JSON: keyBackupVersionResponse{
Algorithm: queryResp.Algorithm,
AuthData: queryResp.AuthData,
Count: queryResp.Count,
ETag: queryResp.ETag,
Version: queryResp.Version,
},
}
}
// Modify the auth data of a key backup. Version must not be empty. Request must contain a `keyBackupVersion`
// Implements PUT /_matrix/client/r0/room_keys/version/{version}
func ModifyKeyBackupVersionAuthData(req *http.Request, userAPI userapi.ClientUserAPI, device *userapi.Device, version string) util.JSONResponse {
var kb keyBackupVersion
resErr := httputil.UnmarshalJSONRequest(req, &kb)
if resErr != nil {
return *resErr
}
var performKeyBackupResp userapi.PerformKeyBackupResponse
if err := userAPI.PerformKeyBackup(req.Context(), &userapi.PerformKeyBackupRequest{
UserID: device.UserID,
Version: version,
AuthData: kb.AuthData,
Algorithm: kb.Algorithm,
}, &performKeyBackupResp); err != nil {
return jsonerror.InternalServerError()
}
if performKeyBackupResp.Error != "" {
if performKeyBackupResp.BadInput {
return util.JSONResponse{
Code: 400,
JSON: jsonerror.InvalidArgumentValue(performKeyBackupResp.Error),
}
}
return util.ErrorResponse(fmt.Errorf("PerformKeyBackup: %s", performKeyBackupResp.Error))
}
if !performKeyBackupResp.Exists {
return util.JSONResponse{
Code: 404,
JSON: jsonerror.NotFound("backup version not found"),
}
}
// Unclear what the 200 body should be
return util.JSONResponse{
Code: 200,
JSON: keyBackupVersionCreateResponse{
Version: performKeyBackupResp.Version,
},
}
}
// Delete a version of key backup. Version must not be empty. If the key backup was previously deleted, will return 200 OK.
// Implements DELETE /_matrix/client/r0/room_keys/version/{version}
func DeleteKeyBackupVersion(req *http.Request, userAPI userapi.ClientUserAPI, device *userapi.Device, version string) util.JSONResponse {
var performKeyBackupResp userapi.PerformKeyBackupResponse
if err := userAPI.PerformKeyBackup(req.Context(), &userapi.PerformKeyBackupRequest{
UserID: device.UserID,
Version: version,
DeleteBackup: true,
}, &performKeyBackupResp); err != nil {
return jsonerror.InternalServerError()
}
if performKeyBackupResp.Error != "" {
if performKeyBackupResp.BadInput {
return util.JSONResponse{
Code: 400,
JSON: jsonerror.InvalidArgumentValue(performKeyBackupResp.Error),
}
}
return util.ErrorResponse(fmt.Errorf("PerformKeyBackup: %s", performKeyBackupResp.Error))
}
if !performKeyBackupResp.Exists {
return util.JSONResponse{
Code: 404,
JSON: jsonerror.NotFound("backup version not found"),
}
}
// Unclear what the 200 body should be
return util.JSONResponse{
Code: 200,
JSON: keyBackupVersionCreateResponse{
Version: performKeyBackupResp.Version,
},
}
}
// Upload a bunch of session keys for a given `version`.
func UploadBackupKeys(
req *http.Request, userAPI userapi.ClientUserAPI, device *userapi.Device, version string, keys *keyBackupSessionRequest,
) util.JSONResponse {
var performKeyBackupResp userapi.PerformKeyBackupResponse
if err := userAPI.PerformKeyBackup(req.Context(), &userapi.PerformKeyBackupRequest{
UserID: device.UserID,
Version: version,
Keys: *keys,
}, &performKeyBackupResp); err != nil && performKeyBackupResp.Error == "" {
return jsonerror.InternalServerError()
}
if performKeyBackupResp.Error != "" {
if performKeyBackupResp.BadInput {
return util.JSONResponse{
Code: 400,
JSON: jsonerror.InvalidArgumentValue(performKeyBackupResp.Error),
}
}
return util.ErrorResponse(fmt.Errorf("PerformKeyBackup: %s", performKeyBackupResp.Error))
}
if !performKeyBackupResp.Exists {
return util.JSONResponse{
Code: 404,
JSON: jsonerror.NotFound("backup version not found"),
}
}
return util.JSONResponse{
Code: 200,
JSON: keyBackupSessionResponse{
Count: performKeyBackupResp.KeyCount,
ETag: performKeyBackupResp.KeyETag,
},
}
}
// Get keys from a given backup version. Response returned varies depending on if roomID and sessionID are set.
func GetBackupKeys(
req *http.Request, userAPI userapi.ClientUserAPI, device *userapi.Device, version, roomID, sessionID string,
) util.JSONResponse {
var queryResp userapi.QueryKeyBackupResponse
userAPI.QueryKeyBackup(req.Context(), &userapi.QueryKeyBackupRequest{
UserID: device.UserID,
Version: version,
ReturnKeys: true,
KeysForRoomID: roomID,
KeysForSessionID: sessionID,
}, &queryResp)
if queryResp.Error != "" {
return util.ErrorResponse(fmt.Errorf("QueryKeyBackup: %s", queryResp.Error))
}
if !queryResp.Exists {
return util.JSONResponse{
Code: 404,
JSON: jsonerror.NotFound("version not found"),
}
}
if sessionID != "" {
// return the key itself if it was found
roomData, ok := queryResp.Keys[roomID]
if ok {
key, ok := roomData[sessionID]
if ok {
return util.JSONResponse{
Code: 200,
JSON: key,
}
}
}
} else if roomID != "" {
roomData, ok := queryResp.Keys[roomID]
if ok {
// wrap response in "sessions"
return util.JSONResponse{
Code: 200,
JSON: struct {
Sessions map[string]userapi.KeyBackupSession `json:"sessions"`
}{
Sessions: roomData,
},
}
}
} else {
// response is the same as the upload request
var resp keyBackupSessionRequest
resp.Rooms = make(map[string]struct {
Sessions map[string]userapi.KeyBackupSession `json:"sessions"`
})
for roomID, roomData := range queryResp.Keys {
resp.Rooms[roomID] = struct {
Sessions map[string]userapi.KeyBackupSession `json:"sessions"`
}{
Sessions: roomData,
}
}
return util.JSONResponse{
Code: 200,
JSON: resp,
}
}
return util.JSONResponse{
Code: 404,
JSON: jsonerror.NotFound("keys not found"),
}
}