// WithFirstPartyCaveat adds a first party caveat with the given predicate
// to m.
func (m *Macaroon) WithFirstPartyCaveat(predicate string) error {
mNext, err := m.newFirstPartyCaveat(predicate)
if err != nil {
return err
}
mPrev := m.m
m.m = mNext.m
C.macaroon_destroy(mPrev)
return nil
}
// WithThirdPartyCaveat adds a caveat with the given location,
// key and id to m.
func (m *Macaroon) WithThirdPartyCaveat(location, key, id string) error {
mNext, err := m.newThirdPartyCaveat(location, key, id)
if err != nil {
return err
}
mPrev := m.m
m.m = mNext.m
C.macaroon_destroy(mPrev)
return nil
}
// NewMacaroon returns a new macaroon with the given location,
// root key and identifier.
func NewMacaroon(location, key, id string) (*Macaroon, error) {
var err C.enum_macaroon_returncode
cLoc, cLocSz := cUStrN(location)
cKey, cKeySz := cUStrN(key)
cId, cIdSz := cUStrN(id)
m := C.macaroon_create(cLoc, cLocSz, cKey, cKeySz, cId, cIdSz, &err)
if err != 0 {
defer C.macaroon_destroy(m)
return nil, macaroonError(err)
}
return &Macaroon{m}, nil
}
// Destroy frees the memory held by a macaroon.
func (m *Macaroon) Destroy() {
C.macaroon_destroy(m.m)
m.m = nil
}