wireguard-go/keypair.go

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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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* Copyright (C) 2017-2018 Mathias N. Hall-Andersen <mathias@hall-andersen.dk>.
*/
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package main
import (
"crypto/cipher"
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"sync"
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"time"
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)
/* 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.
*/
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type Keypair struct {
sendNonce uint64
send cipher.AEAD
receive cipher.AEAD
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replayFilter ReplayFilter
isInitiator bool
created time.Time
localIndex uint32
remoteIndex uint32
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}
type Keypairs struct {
mutex sync.RWMutex
current *Keypair
previous *Keypair
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next *Keypair
}
func (kp *Keypairs) Current() *Keypair {
kp.mutex.RLock()
defer kp.mutex.RUnlock()
return kp.current
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}
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func (device *Device) DeleteKeypair(key *Keypair) {
if key != nil {
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device.indexTable.Delete(key.localIndex)
}
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}