105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
package object
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import (
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"bytes"
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"github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/nspcc-dev/neofs-api-go/pkg/owner"
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crypto "github.com/nspcc-dev/neofs-crypto"
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"github.com/pkg/errors"
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)
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// FormatValidator represents object format validator.
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type FormatValidator struct{}
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var errNilObject = errors.New("object is nil")
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var errNilID = errors.New("missing identifier")
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var errNilCID = errors.New("missing container identifier")
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// NewFormatValidator creates, initializes and returns FormatValidator instance.
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func NewFormatValidator() *FormatValidator {
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return new(FormatValidator)
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}
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// Validate validates object format.
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//
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// Does not validate payload checksum and content.
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//
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// Returns nil error if object has valid structure.
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func (v *FormatValidator) Validate(obj *Object) error {
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if obj == nil {
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return errNilObject
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} else if obj.GetID() == nil {
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return errNilID
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} else if obj.GetContainerID() == nil {
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return errNilCID
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}
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for ; obj != nil; obj = obj.GetParent() {
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if err := v.validateSignatureKey(obj); err != nil {
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return errors.Wrapf(err, "(%T) could not validate signature key", v)
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}
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if err := object.CheckHeaderVerificationFields(obj.SDK()); err != nil {
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return errors.Wrapf(err, "(%T) could not validate header fields", v)
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}
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}
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return nil
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}
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func (v *FormatValidator) validateSignatureKey(obj *Object) error {
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token := obj.GetSessionToken()
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key := obj.GetSignature().GetKey()
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if token == nil || !bytes.Equal(token.SessionKey(), key) {
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return v.checkOwnerKey(obj.GetOwnerID(), obj.GetSignature().GetKey())
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}
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// FIXME: perform token verification
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return nil
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}
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func (v *FormatValidator) checkOwnerKey(id *owner.ID, key []byte) error {
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wallet, err := owner.NEO3WalletFromPublicKey(crypto.UnmarshalPublicKey(key))
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if err != nil {
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// TODO: check via NeoFSID
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return err
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}
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id2 := owner.NewID()
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id2.SetNeo3Wallet(wallet)
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// FIXME: implement Equal method
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if s1, s2 := id.String(), id2.String(); s1 != s2 {
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return errors.Errorf("(%T) different owner identifiers %s/%s", v, s1, s2)
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}
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return nil
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}
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// ValidateContent validates payload content according to object type.
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func (v *FormatValidator) ValidateContent(t object.Type, payload []byte) error {
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switch t {
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case object.TypeTombstone:
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if len(payload) == 0 {
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return errors.Errorf("(%T) empty payload in tombstone", v)
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}
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content, err := TombstoneContentFromBytes(payload)
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if err != nil {
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return errors.Wrapf(err, "(%T) could not parse tombstone content", err)
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}
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for _, addr := range content.GetAddressList() {
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if addr.GetContainerID() == nil || addr.GetObjectID() == nil {
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return errors.Errorf("(%T) empty address reference in tombstone", v)
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}
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}
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}
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return nil
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}
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