// CreateTimestamp creates a new timestamp. If a prev timestamp is provided, it
// is assumed this is the immediately previous one, and the new one will have a
// version number one higher than prev. The store is used to lookup the current
// snapshot, this function does not save the newly generated timestamp.
func CreateTimestamp(gun string, prev *data.SignedTimestamp, snapshot []byte, store storage.MetaStore, cryptoService signed.CryptoService) (*data.Signed, int, error) {
algorithm, public, err := store.GetTimestampKey(gun)
if err != nil {
// owner of gun must have generated a timestamp key otherwise
// we won't proceed with generating everything.
return nil, 0, err
}
key := data.NewPublicKey(algorithm, public)
sn := &data.Signed{}
err = json.Unmarshal(snapshot, sn)
if err != nil {
// couldn't parse snapshot
return nil, 0, err
}
ts, err := data.NewTimestamp(sn)
if err != nil {
return nil, 0, err
}
if prev != nil {
ts.Signed.Version = prev.Signed.Version + 1
}
sgndTs, err := cjson.Marshal(ts.Signed)
if err != nil {
return nil, 0, err
}
out := &data.Signed{
Signatures: ts.Signatures,
Signed: sgndTs,
}
err = signed.Sign(cryptoService, out, key)
if err != nil {
return nil, 0, err
}
return out, ts.Signed.Version, nil
}
// InitRepo creates the base files for a repo. It inspects data.ValidRoles and
// data.ValidTypes to determine what the role names and filename should be. It
// also relies on the keysDB having already been populated with the keys and
// roles.
func (tr *TufRepo) InitRepo(consistent bool) error {
rootRoles := make(map[string]*data.RootRole)
rootKeys := make(map[string]*data.PublicKey)
for _, r := range data.ValidRoles {
role := tr.keysDB.GetRole(r)
if role == nil {
return errors.ErrInvalidRole{}
}
rootRoles[r] = &role.RootRole
for _, kid := range role.KeyIDs {
// don't need to check if GetKey returns nil, Key presence was
// checked by KeyDB when role was added.
key := tr.keysDB.GetKey(kid)
// Create new key object to doubly ensure private key is excluded
k := data.NewPublicKey(key.Cipher(), key.Public())
rootKeys[kid] = k
}
}
root, err := data.NewRoot(rootKeys, rootRoles, consistent)
if err != nil {
return err
}
tr.Root = root
targets := data.NewTargets()
tr.Targets[data.ValidRoles["targets"]] = targets
signedRoot, err := tr.SignRoot(data.DefaultExpires("root"))
if err != nil {
return err
}
signedTargets, err := tr.SignTargets("targets", data.DefaultExpires("targets"))
if err != nil {
return err
}
snapshot, err := data.NewSnapshot(signedRoot, signedTargets)
if err != nil {
return err
}
tr.Snapshot = snapshot
signedSnapshot, err := tr.SignSnapshot(data.DefaultExpires("snapshot"))
if err != nil {
return err
}
timestamp, err := data.NewTimestamp(signedSnapshot)
if err != nil {
return err
}
tr.Timestamp = timestamp
return nil
}
func (tr *TufRepo) InitTimestamp() error {
snap, err := tr.Snapshot.ToSigned()
if err != nil {
return err
}
timestamp, err := data.NewTimestamp(snap)
if err != nil {
return err
}
tr.Timestamp = timestamp
return nil
}
func (tr *TufRepo) InitTimestamp() error {
signedSnapshot, err := tr.SignSnapshot(data.DefaultExpires("snapshot"), nil)
if err != nil {
return err
}
timestamp, err := data.NewTimestamp(signedSnapshot)
if err != nil {
return err
}
tr.Timestamp = timestamp
return nil
}