InvalidTime produces a common reference time to indicate a key does not have a valid creation time or otherwise isnot suitable for operations.

NewGracefulExpiration instantiates a new key rotation object given the maximum age and grace thresholds provided.

GracefulExpiration is an algorithm for planning key rotation given a valid key period, and a grace period.

KeyRotationPlan is the instructions to realize a specific rotation strategy against a KeyStore.

KeyStoreDecorator provides a minimal implementation of KeyStore delegating to the Wrapped keystore.

Key is a bridge to the underlying implementation of a particular KeyStore.

KeyStore abstracts operations to be performed against a key store for rotational capabilities.

KeyList is an anemic type reference for a set of keys...probably should add behavior or get rid of it.