NewPolicy returns an empty policy.

SubjectFromPublicKey returns a Subject from the given public key.

SubjectFromX509Certificate returns a Subject from the given X.509 certificate.

AnySubject is a wildcard subject.

Action is an access control action.

Policy maps from Actions to a mapping from Subjects to booleans indicating whether the given subject is allowed to perform the given action or not.

Subject is an access control subject.