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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
package main
import (
"crypto/cipher"
"sync"
"time"
)
/* Due to limitations in Go and /x/crypto there is currently
* no way to ensure that key material is securely ereased in memory.
*
* Since this may harm the forward secrecy property,
* we plan to resolve this issue; whenever Go allows us to do so.
*/
type KeyPair struct {
sendNonce uint64
send cipher.AEAD
receive cipher.AEAD
replayFilter ReplayFilter
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
}
func (device *Device) DeleteKeyPair(key *KeyPair) {
if key != nil {
device.indices.Delete(key.localIndex)
}
}
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