Exemplo n.º 1
0
func validateRoot(gun string, oldRoot, newRoot []byte) (*data.SignedRoot, error) {
	var parsedOldRoot *data.SignedRoot
	parsedNewRoot := &data.SignedRoot{}

	if oldRoot != nil {
		parsedOldRoot = &data.SignedRoot{}
		err := json.Unmarshal(oldRoot, parsedOldRoot)
		if err != nil {
			// TODO(david): if we can't read the old root should we continue
			//             here to check new root self referential integrity?
			//             This would permit recovery of a repo with a corrupted
			//             root.
			logrus.Warn("Old root could not be parsed.")
		}
	}
	err := json.Unmarshal(newRoot, parsedNewRoot)
	if err != nil {
		return nil, err
	}
	if err := checkRoot(parsedOldRoot, parsedNewRoot); err != nil {
		// TODO(david): how strict do we want to be here about old signatures
		//              for rotations? Should the user have to provide a flag
		//              which gets transmitted to force a root update without
		//              correct old key signatures.
		return nil, err
	}
	if !data.ValidTUFType(parsedNewRoot.Signed.Type, data.CanonicalRootRole) {
		return nil, fmt.Errorf("root has wrong type")
	}
	return parsedNewRoot, nil
}
Exemplo n.º 2
0
func validateSnapshot(role string, oldSnap *data.SignedSnapshot, snapUpdate storage.MetaUpdate, roles map[string]storage.MetaUpdate, kdb *keys.KeyDB) error {
	s := &data.Signed{}
	err := json.Unmarshal(snapUpdate.Data, s)
	if err != nil {
		return errors.New("could not parse snapshot")
	}
	// version specifically gets validated when writing to store to
	// better handle race conditions there.
	if err := signed.Verify(s, role, 0, kdb); err != nil {
		return err
	}

	snap, err := data.SnapshotFromSigned(s)
	if err != nil {
		return errors.New("could not parse snapshot")
	}
	if !data.ValidTUFType(snap.Signed.Type, data.CanonicalSnapshotRole) {
		return errors.New("snapshot has wrong type")
	}
	err = checkSnapshotEntries(role, oldSnap, snap, roles)
	if err != nil {
		return err
	}
	return nil
}
Exemplo n.º 3
0
func verifyMeta(s *data.Signed, role string, minVersion int) error {
	sm := &data.SignedCommon{}
	if err := json.Unmarshal(s.Signed, sm); err != nil {
		return err
	}
	if !data.ValidTUFType(sm.Type, role) {
		return ErrWrongType
	}
	if IsExpired(sm.Expires) {
		logrus.Errorf("Metadata for %s expired", role)
		return ErrExpired{Role: role, Expired: sm.Expires.Format("Mon Jan 2 15:04:05 MST 2006")}
	}
	if sm.Version < minVersion {
		return ErrLowVersion{sm.Version, minVersion}
	}

	return nil
}
Exemplo n.º 4
0
func validateRoot(gun string, oldRoot, newRoot []byte, store storage.MetaStore) (
	*data.SignedRoot, error) {

	var parsedOldRoot *data.SignedRoot
	parsedNewRoot := &data.SignedRoot{}

	if oldRoot != nil {
		parsedOldRoot = &data.SignedRoot{}
		err := json.Unmarshal(oldRoot, parsedOldRoot)
		if err != nil {
			// TODO(david): if we can't read the old root should we continue
			//             here to check new root self referential integrity?
			//             This would permit recovery of a repo with a corrupted
			//             root.
			logrus.Warn("Old root could not be parsed.")
		}
	}
	err := json.Unmarshal(newRoot, parsedNewRoot)
	if err != nil {
		return nil, err
	}

	// Don't update if a timestamp key doesn't exist.
	algo, keyBytes, err := store.GetKey(gun, data.CanonicalTimestampRole)
	if err != nil || algo == "" || keyBytes == nil {
		return nil, fmt.Errorf("no timestamp key for %s", gun)
	}
	timestampKey := data.NewPublicKey(algo, keyBytes)

	if err := checkRoot(parsedOldRoot, parsedNewRoot, timestampKey); err != nil {
		// TODO(david): how strict do we want to be here about old signatures
		//              for rotations? Should the user have to provide a flag
		//              which gets transmitted to force a root update without
		//              correct old key signatures.
		return nil, err
	}

	if !data.ValidTUFType(parsedNewRoot.Signed.Type, data.CanonicalRootRole) {
		return nil, fmt.Errorf("root has wrong type")
	}
	return parsedNewRoot, nil
}
Exemplo n.º 5
0
func validateTargets(role string, roles map[string]storage.MetaUpdate, kdb *keys.KeyDB) (*data.SignedTargets, error) {
	// TODO: when delegations are being validated, validate parent
	//       role exists for any delegation
	s := &data.Signed{}
	err := json.Unmarshal(roles[role].Data, s)
	if err != nil {
		return nil, fmt.Errorf("could not parse %s", role)
	}
	// version specifically gets validated when writing to store to
	// better handle race conditions there.
	if err := signed.Verify(s, role, 0, kdb); err != nil {
		return nil, err
	}
	t, err := data.TargetsFromSigned(s)
	if err != nil {
		return nil, err
	}
	if !data.ValidTUFType(t.Signed.Type, data.CanonicalTargetsRole) {
		return nil, fmt.Errorf("%s has wrong type", role)
	}
	return t, nil
}
Exemplo n.º 6
0
func validateTargets(role string, roles map[string]storage.MetaUpdate, repo *tuf.Repo) (*data.SignedTargets, error) {
	// TODO: when delegations are being validated, validate parent
	//       role exists for any delegation
	s := &data.Signed{}
	err := json.Unmarshal(roles[role].Data, s)
	if err != nil {
		return nil, fmt.Errorf("could not parse %s", role)
	}
	// version specifically gets validated when writing to store to
	// better handle race conditions there.
	var targetOrDelgRole data.BaseRole
	if role == data.CanonicalTargetsRole {
		targetOrDelgRole, err = repo.GetBaseRole(role)
		if err != nil {
			logrus.Debugf("no %s role loaded", role)
			return nil, err
		}
	} else {
		delgRole, err := repo.GetDelegationRole(role)
		if err != nil {
			logrus.Debugf("no %s delegation role loaded", role)
			return nil, err
		}
		targetOrDelgRole = delgRole.BaseRole
	}
	if err := signed.Verify(s, targetOrDelgRole, 0); err != nil {
		return nil, err
	}
	t, err := data.TargetsFromSigned(s)
	if err != nil {
		return nil, err
	}
	if !data.ValidTUFType(t.Signed.Type, data.CanonicalTargetsRole) {
		return nil, fmt.Errorf("%s has wrong type", role)
	}
	return t, nil
}