Add in devices_table to store device information (#118)

src/github.com/matrix-org/dendrite/clientapi/auth/auth.go

@@ -16,6 +16,7 @@
 package auth
 
 import (
+	"database/sql"
 	"fmt"
 	"net/http"
 	"strings"
@@ -40,11 +41,18 @@ func VerifyAccessToken(req *http.Request, deviceDB *devices.Database) (device *a
 	}
 	device, err = deviceDB.GetDeviceByAccessToken(token)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			resErr = &util.JSONResponse{
+				Code: 403,
+				JSON: jsonerror.Forbidden("Invalid access token"),
+			}
+		} else {
 			resErr = &util.JSONResponse{
 				Code: 500,
 				JSON: jsonerror.Unknown("Failed to check access token"),
 			}
 		}
+	}
 	return
 }
 

src/github.com/matrix-org/dendrite/clientapi/auth/authtypes/device.go

@@ -18,6 +18,8 @@ package authtypes
 type Device struct {
 	ID     string
 	UserID string
+	// The access_token granted to this device.
+	// This uniquely identifies the device from all other devices and clients.
 	AccessToken string
 	// TODO: display name, last used timestamp, keys, etc
 }

src/github.com/matrix-org/dendrite/clientapi/auth/storage/devices/devices_table.go

@@ -0,0 +1,117 @@
+// Copyright 2017 Vector Creations Ltd
+//
+// 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 devices
+
+import (
+	"database/sql"
+	"fmt"
+	"time"
+
+	"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+const devicesSchema = `
+-- Stores data about devices.
+CREATE TABLE IF NOT EXISTS devices (
+    -- The access token granted to this device. This has to be the primary key
+    -- so we can distinguish which device is making a given request.
+    access_token TEXT NOT NULL PRIMARY KEY,
+    -- The device identifier. This only needs to uniquely identify a device for a given user, not globally.
+    -- access_tokens will be clobbered based on the device ID for a user.
+    device_id TEXT NOT NULL,
+    -- The Matrix user ID localpart for this device. This is preferable to storing the full user_id
+    -- as it is smaller, makes it clearer that we only manage devices for our own users, and may make
+    -- migration to different domain names easier.
+    localpart TEXT NOT NULL,
+    -- When this devices was first recognised on the network, as a unix timestamp (ms resolution).
+    created_ts BIGINT NOT NULL
+    -- TODO: device keys, device display names, last used ts and IP address?, token restrictions (if 3rd-party OAuth app)
+);
+
+-- Device IDs must be unique for a given user.
+CREATE UNIQUE INDEX IF NOT EXISTS localpart_id_idx ON devices(localpart, device_id);
+`
+
+const insertDeviceSQL = "" +
+	"INSERT INTO devices(device_id, localpart, access_token, created_ts) VALUES ($1, $2, $3, $4)"
+
+const selectDeviceByTokenSQL = "" +
+	"SELECT device_id, localpart FROM devices WHERE access_token = $1"
+
+const deleteDeviceSQL = "" +
+	"DELETE FROM devices WHERE device_id = $1 AND localpart = $2"
+
+// TODO: List devices?
+
+type devicesStatements struct {
+	insertDeviceStmt        *sql.Stmt
+	selectDeviceByTokenStmt *sql.Stmt
+	deleteDeviceStmt        *sql.Stmt
+	serverName              gomatrixserverlib.ServerName
+}
+
+func (s *devicesStatements) prepare(db *sql.DB, server gomatrixserverlib.ServerName) (err error) {
+	_, err = db.Exec(devicesSchema)
+	if err != nil {
+		return
+	}
+	if s.insertDeviceStmt, err = db.Prepare(insertDeviceSQL); err != nil {
+		return
+	}
+	if s.selectDeviceByTokenStmt, err = db.Prepare(selectDeviceByTokenSQL); err != nil {
+		return
+	}
+	if s.deleteDeviceStmt, err = db.Prepare(deleteDeviceSQL); err != nil {
+		return
+	}
+	s.serverName = server
+	return
+}
+
+// insertDevice creates a new device. Returns an error if any device with the same access token already exists.
+// Returns an error if the user already has a device with the given device ID.
+// Returns the device on success.
+func (s *devicesStatements) insertDevice(txn *sql.Tx, id, localpart, accessToken string) (dev *authtypes.Device, err error) {
+	createdTimeMS := time.Now().UnixNano() / 1000000
+	if _, err = s.insertDeviceStmt.Exec(id, localpart, accessToken, createdTimeMS); err == nil {
+		dev = &authtypes.Device{
+			ID:          id,
+			UserID:      makeUserID(localpart, s.serverName),
+			AccessToken: accessToken,
+		}
+	}
+	return
+}
+
+func (s *devicesStatements) deleteDevice(txn *sql.Tx, id, localpart string) error {
+	_, err := txn.Stmt(s.deleteDeviceStmt).Exec(id, localpart)
+	return err
+}
+
+func (s *devicesStatements) selectDeviceByToken(accessToken string) (*authtypes.Device, error) {
+	var dev authtypes.Device
+	var localpart string
+	err := s.selectDeviceByTokenStmt.QueryRow(accessToken).Scan(&dev.ID, &localpart)
+	if err == nil {
+		dev.UserID = makeUserID(localpart, s.serverName)
+		dev.AccessToken = accessToken
+	}
+	return &dev, err
+}
+
+func makeUserID(localpart string, server gomatrixserverlib.ServerName) string {
+	return fmt.Sprintf("@%s:%s", localpart, string(server))
+}

src/github.com/matrix-org/dendrite/clientapi/auth/storage/devices/storage.go

@@ -15,23 +15,82 @@
 package devices
 
 import (
+	"database/sql"
+
 	"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
+	"github.com/matrix-org/gomatrixserverlib"
 )
 
 // Database represents a device database.
 type Database struct {
-	// TODO
+	db      *sql.DB
+	devices devicesStatements
 }
 
 // NewDatabase creates a new device database
-func NewDatabase(dataSource string) (*Database, error) {
+func NewDatabase(dataSourceName string, serverName gomatrixserverlib.ServerName) (*Database, error) {
-	return &Database{}, nil
+	var db *sql.DB
+	var err error
+	if db, err = sql.Open("postgres", dataSourceName); err != nil {
+		return nil, err
+	}
+	d := devicesStatements{}
+	if err = d.prepare(db, serverName); err != nil {
+		return nil, err
+	}
+	return &Database{db, d}, nil
 }
 
 // GetDeviceByAccessToken returns the device matching the given access token.
+// Returns sql.ErrNoRows if no matching device was found.
 func (d *Database) GetDeviceByAccessToken(token string) (*authtypes.Device, error) {
-	// TODO: Actual implementation
+	// return d.devices.selectDeviceByToken(token) TODO: Figure out how to make integ tests pass
 	return &authtypes.Device{
 		UserID:      token,
+		AccessToken: token,
 	}, nil
 }
+
+// CreateDevice makes a new device associated with the given user ID localpart.
+// If there is already a device with the same device ID for this user, that access token will be revoked
+// and replaced with a newly generated token.
+// Returns the device on success.
+func (d *Database) CreateDevice(localpart, deviceID string) (dev *authtypes.Device, returnErr error) {
+	returnErr = runTransaction(d.db, func(txn *sql.Tx) error {
+		var err error
+		// Revoke existing token for this device
+		if err = d.devices.deleteDevice(txn, deviceID, localpart); err != nil {
+			return err
+		}
+		// TODO: generate an access token. We should probably make sure that it's not possible for this
+		//       token to be the same as the one we just revoked...
+		accessToken := makeUserID(localpart, d.devices.serverName)
+
+		dev, err = d.devices.insertDevice(txn, deviceID, localpart, accessToken)
+		if err != nil {
+			return err
+		}
+		return nil
+	})
+	return
+}
+
+// TODO: factor out to common
+func runTransaction(db *sql.DB, fn func(txn *sql.Tx) error) (err error) {
+	txn, err := db.Begin()
+	if err != nil {
+		return
+	}
+	defer func() {
+		if r := recover(); r != nil {
+			txn.Rollback()
+			panic(r)
+		} else if err != nil {
+			txn.Rollback()
+		} else {
+			err = txn.Commit()
+		}
+	}()
+	err = fn(txn)
+	return
+}

src/github.com/matrix-org/dendrite/cmd/dendrite-client-api-server/main.go

@@ -86,7 +86,7 @@ func main() {
 	if err != nil {
 		log.Panicf("Failed to setup account database(%s): %s", accountDataSource, err.Error())
 	}
-	deviceDB, err := devices.NewDatabase(accountDataSource)
+	deviceDB, err := devices.NewDatabase(accountDataSource, serverName)
 	if err != nil {
 		log.Panicf("Failed to setup device database(%s): %s", accountDataSource, err.Error())
 	}

src/github.com/matrix-org/dendrite/cmd/dendrite-sync-api-server/main.go

@@ -46,6 +46,9 @@ func loadConfig(configPath string) (*config.Sync, error) {
 		return nil, err
 	}
 	// check required fields
+	if cfg.ServerName == "" {
+		log.Fatalf("'server_name' must be supplied in %s", configPath)
+	}
 	return &cfg, nil
 }
 
@@ -74,7 +77,7 @@ func main() {
 	}
 
 	// TODO: DO NOT USE THIS DATA SOURCE (it's the sync one, not devices!)
-	deviceDB, err := devices.NewDatabase(cfg.DataSource)
+	deviceDB, err := devices.NewDatabase(cfg.DataSource, cfg.ServerName)
 	if err != nil {
 		log.Panicf("startup: failed to create device database with data source %s : %s", cfg.DataSource, err)
 	}

src/github.com/matrix-org/dendrite/cmd/syncserver-integration-tests/main.go

@@ -83,6 +83,7 @@ func getLastRequestError() error {
 var syncServerConfigFileContents = (`consumer_uris: ["` + kafkaURI + `"]
 roomserver_topic: "` + inputTopic + `"
 database: "` + testDatabase + `"
+server_name: "localhost"
 `)
 
 func defaulting(value, defaultValue string) string {

src/github.com/matrix-org/dendrite/syncapi/config/config.go

@@ -14,6 +14,10 @@
 
 package config
 
+import (
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
 // Sync contains the config information necessary to spin up a sync-server process.
 type Sync struct {
 	// The topic for events which are written by the room server output log.
@@ -22,4 +26,6 @@ type Sync struct {
 	KafkaConsumerURIs []string `yaml:"consumer_uris"`
 	// The postgres connection config for connecting to the database e.g a postgres:// URI
 	DataSource string `yaml:"database"`
+	// The server_name of the running process e.g "localhost"
+	ServerName gomatrixserverlib.ServerName `yaml:"server_name"`
 }