snow/wireguard-go
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replay: minor API changes to more idiomatic Go

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Signed-off-by: Riobard Zhan <me@riobard.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Riobard Zhan 2020-09-10 02:06:44 +08:00 committed by Jason A. Donenfeld
parent 22af3890f6
commit 2c143dce0f
4 changed files with 17 additions and 17 deletions
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2
device/keypair.go
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@ -26,7 +26,7 @@ type Keypair struct {
sendNonce uint64
send cipher.AEAD
receive cipher.AEAD
replayFilter replay.ReplayFilter
replayFilter replay.Filter
isInitiator bool
created time.Time
localIndex uint32

2
device/noise-protocol.go
View file

@ -567,7 +567,7 @@ func (peer *Peer) BeginSymmetricSession() error {
keypair.created = time.Now()
keypair.sendNonce = 0
keypair.replayFilter.Init()
keypair.replayFilter.Reset()
keypair.isInitiator = isInitiator
keypair.localIndex = peer.handshake.localIndex
keypair.remoteIndex = peer.handshake.remoteIndex

12
replay/replay.go
View file

@ -17,24 +17,24 @@ const (
bitMask = blockBits - 1
)
// A ReplayFilter rejects replayed messages by checking if message counter value is
// A Filter rejects replayed messages by checking if message counter value is
// within a sliding window of previously received messages.
// The zero value for ReplayFilter is an empty filter ready to use.
// The zero value for Filter is an empty filter ready to use.
// Filters are unsafe for concurrent use.
type ReplayFilter struct {
type Filter struct {
last uint64
ring [ringBlocks]block
}
// Init resets the filter to empty state.
func (f *ReplayFilter) Init() {
// Reset resets the filter to empty state.
func (f *Filter) Reset() {
f.last = 0
f.ring[0] = 0
}
// ValidateCounter checks if the counter should be accepted.
// Overlimit counters (>= limit) are always rejected.
func (f *ReplayFilter) ValidateCounter(counter uint64, limit uint64) bool {
func (f *Filter) ValidateCounter(counter uint64, limit uint64) bool {
if counter >= limit {
return false
}

18
replay/replay_test.go
View file

@ -14,10 +14,10 @@ import (
*
*/
const RejectAfterMessages = (1 << 64) - (1 << 4) - 1
const RejectAfterMessages = 1<<64 - 1<<13 - 1
func TestReplay(t *testing.T) {
var filter ReplayFilter
var filter Filter
const T_LIM = windowSize + 1
@ -29,7 +29,7 @@ func TestReplay(t *testing.T) {
}
}
filter.Init()
filter.Reset()
T(0, true) /* 1 */
T(1, true) /* 2 */
@ -67,7 +67,7 @@ func TestReplay(t *testing.T) {
T(0, false) /* 34 */
t.Log("Bulk test 1")
filter.Init()
filter.Reset()
testNumber = 0
for i := uint64(1); i <= windowSize; i++ {
T(i, true)
@ -76,7 +76,7 @@ func TestReplay(t *testing.T) {
T(0, false)
t.Log("Bulk test 2")
filter.Init()
filter.Reset()
testNumber = 0
for i := uint64(2); i <= windowSize+1; i++ {
T(i, true)
@ -85,14 +85,14 @@ func TestReplay(t *testing.T) {
T(0, false)
t.Log("Bulk test 3")
filter.Init()
filter.Reset()
testNumber = 0
for i := uint64(windowSize + 1); i > 0; i-- {
T(i, true)
}
t.Log("Bulk test 4")
filter.Init()
filter.Reset()
testNumber = 0
for i := uint64(windowSize + 2); i > 1; i-- {
T(i, true)
@ -100,7 +100,7 @@ func TestReplay(t *testing.T) {
T(0, false)
t.Log("Bulk test 5")
filter.Init()
filter.Reset()
testNumber = 0
for i := uint64(windowSize); i > 0; i-- {
T(i, true)
@ -109,7 +109,7 @@ func TestReplay(t *testing.T) {
T(0, false)
t.Log("Bulk test 6")
filter.Init()
filter.Reset()
testNumber = 0
for i := uint64(windowSize); i > 0; i-- {
T(i, true)