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// 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 postgres
import (
"context"
"crypto/rand"
"database/sql"
"encoding/base64"
"github.com/matrix-org/dendrite/internal/config"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/gomatrixserverlib"
)
// The length of generated device IDs
var deviceIDByteLength = 6
// Database represents a device database.
type Database struct {
db *sql.DB
devices devicesStatements
}
// NewDatabase creates a new device database
func NewDatabase(dbProperties *config.DatabaseOptions, serverName gomatrixserverlib.ServerName) (*Database, error) {
db, err := sqlutil.Open(dbProperties)
if 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(
ctx context.Context, token string,
) (*api.Device, error) {
return d.devices.selectDeviceByToken(ctx, token)
}
// GetDeviceByID returns the device matching the given ID.
// Returns sql.ErrNoRows if no matching device was found.
func (d *Database) GetDeviceByID(
ctx context.Context, localpart, deviceID string,
) (*api.Device, error) {
return d.devices.selectDeviceByID(ctx, localpart, deviceID)
}
// GetDevicesByLocalpart returns the devices matching the given localpart.
func (d *Database) GetDevicesByLocalpart(
ctx context.Context, localpart string,
) ([]api.Device, error) {
return d.devices.selectDevicesByLocalpart(ctx, nil, localpart, "")
}
func (d *Database) GetDevicesByID(ctx context.Context, deviceIDs []string) ([]api.Device, error) {
return d.devices.selectDevicesByID(ctx, deviceIDs)
}
// 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 the given accessToken. If the given accessToken is already in use for another device,
// an error will be returned.
// If no device ID is given one is generated.
// Returns the device on success.
func (d *Database) CreateDevice(
ctx context.Context, localpart string, deviceID *string, accessToken string,
displayName *string, ipAddr, userAgent string,
) (dev *api.Device, returnErr error) {
if deviceID != nil {
returnErr = sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
var err error
// Revoke existing tokens for this device
if err = d.devices.deleteDevice(ctx, txn, *deviceID, localpart); err != nil {
return err
}
dev, err = d.devices.insertDevice(ctx, txn, *deviceID, localpart, accessToken, displayName, ipAddr, userAgent)
return err
})
} else {
// We generate device IDs in a loop in case its already taken.
// We cap this at going round 5 times to ensure we don't spin forever
var newDeviceID string
for i := 1; i <= 5; i++ {
newDeviceID, returnErr = generateDeviceID()
if returnErr != nil {
return
}
returnErr = sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
var err error
dev, err = d.devices.insertDevice(ctx, txn, newDeviceID, localpart, accessToken, displayName, ipAddr, userAgent)
return err
})
if returnErr == nil {
return
}
}
}
return
}
// generateDeviceID creates a new device id. Returns an error if failed to generate
// random bytes.
func generateDeviceID() (string, error) {
b := make([]byte, deviceIDByteLength)
_, err := rand.Read(b)
if err != nil {
return "", err
}
// url-safe no padding
return base64.RawURLEncoding.EncodeToString(b), nil
}
// UpdateDevice updates the given device with the display name.
// Returns SQL error if there are problems and nil on success.
func (d *Database) UpdateDevice(
ctx context.Context, localpart, deviceID string, displayName *string,
) error {
return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
return d.devices.updateDeviceName(ctx, txn, localpart, deviceID, displayName)
})
}
// RemoveDevice revokes a device by deleting the entry in the database
// matching with the given device ID and user ID localpart.
// If the device doesn't exist, it will not return an error
// If something went wrong during the deletion, it will return the SQL error.
func (d *Database) RemoveDevice(
ctx context.Context, deviceID, localpart string,
) error {
return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
if err := d.devices.deleteDevice(ctx, txn, deviceID, localpart); err != sql.ErrNoRows {
return err
}
return nil
})
}
// RemoveDevices revokes one or more devices by deleting the entry in the database
// matching with the given device IDs and user ID localpart.
// If the devices don't exist, it will not return an error
// If something went wrong during the deletion, it will return the SQL error.
func (d *Database) RemoveDevices(
ctx context.Context, localpart string, devices []string,
) error {
return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
if err := d.devices.deleteDevices(ctx, txn, localpart, devices); err != sql.ErrNoRows {
return err
}
return nil
})
}
// RemoveAllDevices revokes devices by deleting the entry in the
// database matching the given user ID localpart.
// If something went wrong during the deletion, it will return the SQL error.
func (d *Database) RemoveAllDevices(
ctx context.Context, localpart, exceptDeviceID string,
) (devices []api.Device, err error) {
err = sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
devices, err = d.devices.selectDevicesByLocalpart(ctx, txn, localpart, exceptDeviceID)
if err != nil {
return err
}
if err := d.devices.deleteDevicesByLocalpart(ctx, txn, localpart, exceptDeviceID); err != sql.ErrNoRows {
return err
}
return nil
})
return
}
// UpdateDeviceLastSeen updates a the last seen timestamp and the ip address
func (d *Database) UpdateDeviceLastSeen(ctx context.Context, deviceID, ipAddr string) error {
return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
return d.devices.updateDeviceLastSeen(ctx, txn, deviceID, ipAddr)
})
}
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