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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"
}
/* Called during recieving to confirm the handshake
* was completed correctly
*/
func (kp *KeyPairs) Used(key *KeyPair) {
if key == kp.next {
kp.mutex.Lock()
kp.previous = kp.current
kp.current = key
kp.next = nil
kp.mutex.Unlock()
}
}
func (kp *KeyPairs) Current() *KeyPair {
kp.mutex.RLock()
defer kp.mutex.RUnlock()
return kp.current
}
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