wireguard-go/src/keypair.go

package main

import (
	"crypto/cipher"
	"sync"
	"time"
)

type KeyPair struct {
	receive     cipher.AEAD
	send        cipher.AEAD
	sendNonce   uint64
	isInitiator bool
	created     time.Time
	localIndex  uint32
	remoteIndex uint32
}

type KeyPairs struct {
	mutex    sync.RWMutex
	current  *KeyPair
	previous *KeyPair
	next     *KeyPair // not yet "confirmed by transport"
}

func (kp *KeyPairs) Current() *KeyPair {
	kp.mutex.RLock()
	defer kp.mutex.RUnlock()
	return kp.current
}