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
}
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
}
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
}
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
}
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
}
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
}