replay

Documentation

Overview

Package replay implements an efficient anti-replay algorithm as specified in RFC 6479.

Index

• Constants
• type Filter
  • func (f *Filter) Reset()
  • func (f *Filter) ValidateCounter(counter, limit uint64) bool

Constants

const (
	// RekeyAfterMessages is the maximum number of messages that can be sent before rekeying.
	RekeyAfterMessages = (1 << 60)
	// RejectAfterMessages is the maximum number of messages that can be accepted before rejecting further messages.
	RejectAfterMessages = (1 << 64) - (1 << 13) - 1
)

Types

type Filter

type Filter struct {
	// contains filtered or unexported fields
}

Filter rejects replayed messages by checking if message counter value is within a sliding window of previously received messages. The zero value for Filter is an empty, ready-to-use, thread-safe filter.

func (*Filter) Reset

func (f *Filter) Reset()

Reset resets the filter to empty state.

func (*Filter) ValidateCounter

func (f *Filter) ValidateCounter(counter, limit uint64) bool

ValidateCounter checks if the counter should be accepted. Overlimit counters (>= limit) are always rejected.