frostfs-node/pkg/core/object/fmt.go
Pavel Karpy 25826bd96d [#1461] node: Do not accept lock object w/o expiration
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
2022-07-18 11:42:25 +03:00

389 lines
9.2 KiB
Go

package object
import (
"crypto/ecdsa"
"errors"
"fmt"
"strconv"
objectV2 "github.com/nspcc-dev/neofs-api-go/v2/object"
"github.com/nspcc-dev/neofs-api-go/v2/refs"
"github.com/nspcc-dev/neofs-node/pkg/core/netmap"
cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
neofsecdsa "github.com/nspcc-dev/neofs-sdk-go/crypto/ecdsa"
"github.com/nspcc-dev/neofs-sdk-go/object"
oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
"github.com/nspcc-dev/neofs-sdk-go/storagegroup"
"github.com/nspcc-dev/neofs-sdk-go/user"
)
// FormatValidator represents an object format validator.
type FormatValidator struct {
*cfg
}
// FormatValidatorOption represents a FormatValidator constructor option.
type FormatValidatorOption func(*cfg)
type cfg struct {
deleteHandler DeleteHandler
netState netmap.State
locker Locker
}
// DeleteHandler is an interface of delete queue processor.
type DeleteHandler interface {
// DeleteObjects places objects to a removal queue.
//
// Returns apistatus.LockNonRegularObject if at least one object
// is locked.
DeleteObjects(oid.Address, ...oid.Address) error
}
// Locker is an object lock storage interface.
type Locker interface {
// Lock list of objects as locked by locker in the specified container.
//
// Returns apistatus.LockNonRegularObject if at least object in locked
// list is irregular (not type of REGULAR).
Lock(idCnr cid.ID, locker oid.ID, locked []oid.ID) error
}
var errNilObject = errors.New("object is nil")
var errNilID = errors.New("missing identifier")
var errNilCID = errors.New("missing container identifier")
var errNoExpirationEpoch = errors.New("missing expiration epoch attribute")
var errTombstoneExpiration = errors.New("tombstone body and header contain different expiration values")
var errEmptySGMembers = errors.New("storage group with empty members list")
func defaultCfg() *cfg {
return new(cfg)
}
// NewFormatValidator creates, initializes and returns FormatValidator instance.
func NewFormatValidator(opts ...FormatValidatorOption) *FormatValidator {
cfg := defaultCfg()
for i := range opts {
opts[i](cfg)
}
return &FormatValidator{
cfg: cfg,
}
}
// Validate validates object format.
//
// Does not validate payload checksum and content.
// If unprepared is true, only fields set by user are validated.
//
// Returns nil error if the object has valid structure.
func (v *FormatValidator) Validate(obj *object.Object, unprepared bool) error {
if obj == nil {
return errNilObject
}
_, idSet := obj.ID()
if !unprepared && !idSet {
return errNilID
}
_, cnrSet := obj.ContainerID()
if !cnrSet {
return errNilCID
}
if err := v.checkOwner(obj); err != nil {
return err
}
if err := v.checkAttributes(obj); err != nil {
return fmt.Errorf("invalid attributes: %w", err)
}
if !unprepared {
if err := v.validateSignatureKey(obj); err != nil {
return fmt.Errorf("(%T) could not validate signature key: %w", v, err)
}
if err := v.checkExpiration(obj); err != nil {
return fmt.Errorf("object did not pass expiration check: %w", err)
}
if err := object.CheckHeaderVerificationFields(obj); err != nil {
return fmt.Errorf("(%T) could not validate header fields: %w", v, err)
}
}
if obj = obj.Parent(); obj != nil {
// Parent object already exists.
return v.Validate(obj, false)
}
return nil
}
func (v *FormatValidator) validateSignatureKey(obj *object.Object) error {
// FIXME(@cthulhu-rider): temp solution, see neofs-sdk-go#233
sig := obj.Signature()
if sig == nil {
// TODO(@cthulhu-rider): #1387 use "const" error
return errors.New("missing signature")
}
var sigV2 refs.Signature
sig.WriteToV2(&sigV2)
binKey := sigV2.GetKey()
var key neofsecdsa.PublicKey
err := key.Decode(binKey)
if err != nil {
return fmt.Errorf("decode public key: %w", err)
}
token := obj.SessionToken()
if token == nil || !token.AssertAuthKey(&key) {
return v.checkOwnerKey(*obj.OwnerID(), key)
}
// FIXME: #1159 perform token verification
return nil
}
func (v *FormatValidator) checkOwnerKey(id user.ID, key neofsecdsa.PublicKey) error {
var id2 user.ID
user.IDFromKey(&id2, (ecdsa.PublicKey)(key))
if !id.Equals(id2) {
return fmt.Errorf("(%T) different owner identifiers %s/%s", v, id, id2)
}
return nil
}
// ValidateContent validates payload content according to the object type.
func (v *FormatValidator) ValidateContent(o *object.Object) error {
switch o.Type() {
case object.TypeRegular:
// ignore regular objects, they do not need payload formatting
case object.TypeTombstone:
if len(o.Payload()) == 0 {
return fmt.Errorf("(%T) empty payload in tombstone", v)
}
tombstone := object.NewTombstone()
if err := tombstone.Unmarshal(o.Payload()); err != nil {
return fmt.Errorf("(%T) could not unmarshal tombstone content: %w", v, err)
}
// check if the tombstone has the same expiration in the body and the header
exp, err := expirationEpochAttribute(o)
if err != nil {
return err
}
if exp != tombstone.ExpirationEpoch() {
return errTombstoneExpiration
}
// mark all objects from the tombstone body as removed in the storage engine
cnr, ok := o.ContainerID()
if !ok {
return errors.New("missing container ID")
}
idList := tombstone.Members()
addrList := make([]oid.Address, len(idList))
for i := range idList {
addrList[i].SetContainer(cnr)
addrList[i].SetObject(idList[i])
}
if v.deleteHandler != nil {
err = v.deleteHandler.DeleteObjects(AddressOf(o), addrList...)
if err != nil {
return fmt.Errorf("delete objects from %s object content: %w", o.Type(), err)
}
}
case object.TypeStorageGroup:
if len(o.Payload()) == 0 {
return fmt.Errorf("(%T) empty payload in SG", v)
}
var sg storagegroup.StorageGroup
if err := sg.Unmarshal(o.Payload()); err != nil {
return fmt.Errorf("(%T) could not unmarshal SG content: %w", v, err)
}
mm := sg.Members()
lenMM := len(mm)
if lenMM == 0 {
return errEmptySGMembers
}
uniqueFilter := make(map[oid.ID]struct{}, lenMM)
for i := 0; i < lenMM; i++ {
if _, alreadySeen := uniqueFilter[mm[i]]; alreadySeen {
return fmt.Errorf("storage group contains non-unique member: %s", mm[i])
}
uniqueFilter[mm[i]] = struct{}{}
}
case object.TypeLock:
if len(o.Payload()) == 0 {
return errors.New("empty payload in lock")
}
cnr, ok := o.ContainerID()
if !ok {
return errors.New("missing container")
}
id, ok := o.ID()
if !ok {
return errors.New("missing ID")
}
// check that LOCK object has correct expiration epoch
lockExp, err := expirationEpochAttribute(o)
if err != nil {
return fmt.Errorf("lock object expiration epoch: %w", err)
}
if currEpoch := v.netState.CurrentEpoch(); lockExp <= currEpoch {
return fmt.Errorf("lock object expiration: %d; current: %d", lockExp, currEpoch)
}
var lock object.Lock
err = lock.Unmarshal(o.Payload())
if err != nil {
return fmt.Errorf("decode lock payload: %w", err)
}
if v.locker != nil {
num := lock.NumberOfMembers()
if num == 0 {
return errors.New("missing locked members")
}
// mark all objects from lock list as locked in the storage engine
locklist := make([]oid.ID, num)
lock.ReadMembers(locklist)
err = v.locker.Lock(cnr, id, locklist)
if err != nil {
return fmt.Errorf("lock objects from %s object content: %w", o.Type(), err)
}
}
default:
// ignore all other object types, they do not need payload formatting
}
return nil
}
var errExpired = errors.New("object has expired")
func (v *FormatValidator) checkExpiration(obj *object.Object) error {
exp, err := expirationEpochAttribute(obj)
if err != nil {
if errors.Is(err, errNoExpirationEpoch) {
return nil // objects without expiration attribute are valid
}
return err
}
if exp < v.netState.CurrentEpoch() {
return errExpired
}
return nil
}
func expirationEpochAttribute(obj *object.Object) (uint64, error) {
for _, a := range obj.Attributes() {
if a.Key() != objectV2.SysAttributeExpEpoch {
continue
}
return strconv.ParseUint(a.Value(), 10, 64)
}
return 0, errNoExpirationEpoch
}
var (
errDuplAttr = errors.New("duplication of attributes detected")
errEmptyAttrVal = errors.New("empty attribute value")
)
func (v *FormatValidator) checkAttributes(obj *object.Object) error {
as := obj.Attributes()
mUnique := make(map[string]struct{}, len(as))
for _, a := range as {
key := a.Key()
if _, was := mUnique[key]; was {
return errDuplAttr
}
if a.Value() == "" {
return errEmptyAttrVal
}
mUnique[key] = struct{}{}
}
return nil
}
var errIncorrectOwner = errors.New("incorrect object owner")
func (v *FormatValidator) checkOwner(obj *object.Object) error {
if idOwner := obj.OwnerID(); idOwner == nil || len(idOwner.WalletBytes()) == 0 {
return errIncorrectOwner
}
return nil
}
// WithNetState returns options to set the network state interface.
func WithNetState(netState netmap.State) FormatValidatorOption {
return func(c *cfg) {
c.netState = netState
}
}
// WithDeleteHandler returns an option to set delete queue processor.
func WithDeleteHandler(v DeleteHandler) FormatValidatorOption {
return func(c *cfg) {
c.deleteHandler = v
}
}
// WithLocker returns an option to set object lock storage.
func WithLocker(v Locker) FormatValidatorOption {
return func(c *cfg) {
c.locker = v
}
}