status-go/server/pairing/payload_receiver.go

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package pairing
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"go.uber.org/multierr"
"go.uber.org/zap"
"github.com/status-im/status-go/api"
"github.com/status-im/status-go/multiaccounts"
"github.com/status-im/status-go/params"
"github.com/status-im/status-go/signal"
)
type PayloadReceiver interface {
PayloadLocker
// Receive accepts data from an inbound source into the PayloadReceiver's state
Receive(data []byte) error
// Received returns a decrypted and parsed payload from an inbound source
Received() []byte
}
type PayloadStorer interface {
Store() error
}
type BasePayloadReceiver struct {
*PayloadLockPayload
*PayloadReceived
encryptor *PayloadEncryptor
unmarshaller ProtobufUnmarshaller
storer PayloadStorer
receiveCallback func()
}
func NewBaseBasePayloadReceiver(e *PayloadEncryptor, um ProtobufUnmarshaller, s PayloadStorer, callback func()) *BasePayloadReceiver {
return &BasePayloadReceiver{
PayloadLockPayload: &PayloadLockPayload{e},
PayloadReceived: &PayloadReceived{e},
encryptor: e,
unmarshaller: um,
storer: s,
receiveCallback: callback,
}
}
// Receive takes a []byte representing raw data, parses and stores the data
func (bpr *BasePayloadReceiver) Receive(data []byte) error {
err := bpr.encryptor.decrypt(data)
if err != nil {
return err
}
err = bpr.unmarshaller.UnmarshalProtobuf(bpr.Received())
if err != nil {
return err
}
if bpr.receiveCallback != nil {
bpr.receiveCallback()
}
return bpr.storer.Store()
}
/*
|--------------------------------------------------------------------------
| AccountPayload
|--------------------------------------------------------------------------
|
| AccountPayloadReceiver, AccountPayloadStorer and AccountPayloadMarshaller
|
*/
// NewAccountPayloadReceiver generates a new and initialised AccountPayload flavoured BasePayloadReceiver
// AccountPayloadReceiver is responsible for the whole receive and store cycle of an AccountPayload
func NewAccountPayloadReceiver(e *PayloadEncryptor, p *AccountPayload, config *ReceiverConfig, logger *zap.Logger) (*BasePayloadReceiver, error) {
l := logger.Named("AccountPayloadManager")
l.Debug("fired", zap.Any("config", config))
e = e.Renew()
aps, err := NewAccountPayloadStorer(p, config)
if err != nil {
return nil, err
}
return NewBaseBasePayloadReceiver(e, NewPairingPayloadMarshaller(p, l), aps,
func() {
signal.SendLocalPairingEvent(Event{Type: EventReceivedAccount, Action: ActionPairingAccount, Data: p.multiaccount})
},
), nil
}
// AccountPayloadStorer is responsible for parsing, validating and storing AccountPayload data
type AccountPayloadStorer struct {
*AccountPayload
multiaccountsDB *multiaccounts.Database
keystorePath string
kdfIterations int
loggedInKeyUID string
}
func NewAccountPayloadStorer(p *AccountPayload, config *ReceiverConfig) (*AccountPayloadStorer, error) {
ppr := &AccountPayloadStorer{
AccountPayload: p,
}
if config == nil {
return ppr, nil
}
ppr.multiaccountsDB = config.DB
ppr.kdfIterations = config.KDFIterations
ppr.keystorePath = config.KeystorePath
ppr.loggedInKeyUID = config.LoggedInKeyUID
return ppr, nil
}
func (aps *AccountPayloadStorer) Store() error {
keyUID := aps.multiaccount.KeyUID
if aps.loggedInKeyUID != "" && aps.loggedInKeyUID != keyUID {
return ErrLoggedInKeyUIDConflict
}
if aps.loggedInKeyUID == keyUID {
// skip storing keys if user is logged in with the same key
return nil
}
err := validateKeys(aps.keys, aps.password)
if err != nil {
return err
}
if err = aps.storeKeys(aps.keystorePath); err != nil && err != ErrKeyFileAlreadyExists {
return err
}
// skip storing multiaccount if key already exists
if err == ErrKeyFileAlreadyExists {
aps.exist = true
aps.multiaccount, err = aps.multiaccountsDB.GetAccount(keyUID)
if err != nil {
return err
}
return nil
}
return aps.storeMultiAccount()
}
func (aps *AccountPayloadStorer) storeKeys(keyStorePath string) error {
if keyStorePath == "" {
return fmt.Errorf("keyStorePath can not be empty")
}
_, lastDir := filepath.Split(keyStorePath)
// If lastDir == keystoreDir we presume we need to create the rest of the keystore path
// else we presume the provided keystore is valid
if lastDir == keystoreDir {
if aps.multiaccount == nil || aps.multiaccount.KeyUID == "" {
return fmt.Errorf("no known Key UID")
}
keyStorePath = filepath.Join(keyStorePath, aps.multiaccount.KeyUID)
_, err := os.Stat(keyStorePath)
if os.IsNotExist(err) {
err := os.MkdirAll(keyStorePath, 0700)
if err != nil {
return err
}
} else if err != nil {
return err
} else {
return ErrKeyFileAlreadyExists
}
}
for name, data := range aps.keys {
err := ioutil.WriteFile(filepath.Join(keyStorePath, name), data, 0600)
if err != nil {
writeErr := fmt.Errorf("failed to write key to path '%s' : %w", filepath.Join(keyStorePath, name), err)
// If we get an error on any of the key files attempt to revert
err := emptyDir(keyStorePath)
if err != nil {
// If we get an error when trying to empty the dir combine the write error and empty error
emptyDirErr := fmt.Errorf("failed to revert and cleanup storeKeys : %w", err)
return multierr.Combine(writeErr, emptyDirErr)
}
return writeErr
}
}
return nil
}
func (aps *AccountPayloadStorer) storeMultiAccount() error {
aps.multiaccount.KDFIterations = aps.kdfIterations
return aps.multiaccountsDB.SaveAccount(*aps.multiaccount)
}
/*
|--------------------------------------------------------------------------
| RawMessagePayload
|--------------------------------------------------------------------------
|
| RawMessagePayloadReceiver and RawMessageStorer
|
*/
// NewRawMessagePayloadReceiver generates a new and initialised RawMessagesPayload flavoured BasePayloadReceiver
// RawMessagePayloadReceiver is responsible for the whole receive and store cycle of a RawMessagesPayload
func NewRawMessagePayloadReceiver(accountPayload *AccountPayload, e *PayloadEncryptor, backend *api.GethStatusBackend, config *ReceiverConfig) *BasePayloadReceiver {
e = e.Renew()
payload := NewRawMessagesPayload()
return NewBaseBasePayloadReceiver(e,
NewRawMessagePayloadMarshaller(payload),
NewRawMessageStorer(backend, payload, accountPayload, config), nil)
}
type RawMessageStorer struct {
payload *RawMessagesPayload
syncRawMessageHandler *SyncRawMessageHandler
accountPayload *AccountPayload
nodeConfig *params.NodeConfig
settingCurrentNetwork string
deviceType string
}
func NewRawMessageStorer(backend *api.GethStatusBackend, payload *RawMessagesPayload, accountPayload *AccountPayload, config *ReceiverConfig) *RawMessageStorer {
return &RawMessageStorer{
syncRawMessageHandler: NewSyncRawMessageHandler(backend),
payload: payload,
accountPayload: accountPayload,
nodeConfig: config.NodeConfig,
settingCurrentNetwork: config.SettingCurrentNetwork,
deviceType: config.DeviceType,
}
}
func (r *RawMessageStorer) Store() error {
if r.accountPayload == nil || r.accountPayload.multiaccount == nil {
return fmt.Errorf("no known multiaccount when storing raw messages")
}
return r.syncRawMessageHandler.HandleRawMessage(r.accountPayload, r.nodeConfig, r.settingCurrentNetwork, r.deviceType, r.payload)
}
/*
|--------------------------------------------------------------------------
| InstallationPayload
|--------------------------------------------------------------------------
|
| InstallationPayloadReceiver and InstallationPayloadStorer
|
*/
// NewInstallationPayloadReceiver generates a new and initialised InstallationPayload flavoured BasePayloadReceiver
// InstallationPayloadReceiver is responsible for the whole receive and store cycle of a RawMessagesPayload specifically
// for sending / requesting installation data from the Receiver device.
func NewInstallationPayloadReceiver(e *PayloadEncryptor, backend *api.GethStatusBackend, deviceType string) *BasePayloadReceiver {
e = e.Renew()
payload := NewRawMessagesPayload()
return NewBaseBasePayloadReceiver(e,
NewRawMessagePayloadMarshaller(payload),
NewInstallationPayloadStorer(backend, payload, deviceType), nil)
}
type InstallationPayloadStorer struct {
payload *RawMessagesPayload
syncRawMessageHandler *SyncRawMessageHandler
deviceType string
backend *api.GethStatusBackend
}
func NewInstallationPayloadStorer(backend *api.GethStatusBackend, payload *RawMessagesPayload, deviceType string) *InstallationPayloadStorer {
return &InstallationPayloadStorer{
payload: payload,
syncRawMessageHandler: NewSyncRawMessageHandler(backend),
deviceType: deviceType,
backend: backend,
}
}
func (r *InstallationPayloadStorer) Store() error {
messenger := r.backend.Messenger()
if messenger == nil {
return fmt.Errorf("messenger is nil when invoke InstallationPayloadRepository#Store()")
}
err := messenger.SetInstallationDeviceType(r.deviceType)
if err != nil {
return err
}
return messenger.HandleSyncRawMessages(r.payload.rawMessages)
}
/*
|--------------------------------------------------------------------------
| PayloadReceivers
|--------------------------------------------------------------------------
|
| Funcs for all PayloadReceivers AccountPayloadReceiver, RawMessagePayloadReceiver and InstallationPayloadMounter
|
*/
func NewPayloadReceivers(logger *zap.Logger, pe *PayloadEncryptor, backend *api.GethStatusBackend, config *ReceiverConfig) (PayloadReceiver, PayloadReceiver, PayloadMounterReceiver, error) {
// A new SHARED AccountPayload
p := new(AccountPayload)
ar, err := NewAccountPayloadReceiver(pe, p, config, logger)
if err != nil {
return nil, nil, nil, err
}
rmr := NewRawMessagePayloadReceiver(p, pe, backend, config)
imr := NewInstallationPayloadMounterReceiver(pe, backend, config.DeviceType)
return ar, rmr, imr, nil
}