blob: 2f2f222c2cdc75e262814121f6636a35df37c5e6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2020 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"crypto/cipher"
"sync"
"sync/atomic"
"time"
"unsafe"
"golang.zx2c4.com/wireguard/replay"
)
/* 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 replay.ReplayFilter
isInitiator bool
created time.Time
localIndex uint32
remoteIndex uint32
}
type Keypairs struct {
sync.RWMutex
current *Keypair
previous *Keypair
next *Keypair
}
func (kp *Keypairs) storeNext(next *Keypair) {
atomic.StorePointer((*unsafe.Pointer)((unsafe.Pointer)(&kp.next)), (unsafe.Pointer)(next))
}
func (kp *Keypairs) loadNext() *Keypair {
return (*Keypair)(atomic.LoadPointer((*unsafe.Pointer)((unsafe.Pointer)(&kp.next))))
}
func (kp *Keypairs) Current() *Keypair {
kp.RLock()
defer kp.RUnlock()
return kp.current
}
func (device *Device) DeleteKeypair(key *Keypair) {
if key != nil {
device.indexTable.Delete(key.localIndex)
}
}
|
