kubernetes/staging/src/k8s.io/apiserver/pkg/storage/value/encrypt/envelope/kmsv2/cache.go

type simpleCache …

func newSimpleCache(clock clock.Clock, ttl time.Duration, providerName string) *simpleCache { … }

// given a key, return the transformer, or nil if it does not exist in the cache
func (c *simpleCache) get(key []byte) value.Read { … }

// set caches the record for the key
func (c *simpleCache) set(key []byte, transformer value.Read) { … }

// keyFunc generates a string key by hashing the inputs.
// This lowers the memory requirement of the cache.
func (c *simpleCache) keyFunc(s []byte) string { … }

// toString performs unholy acts to avoid allocations
func toString(b []byte) string { … }