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obfs_test.go
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obfs_test.go
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package mwgp
import (
"crypto/rand"
"golang.zx2c4.com/wireguard/device"
"testing"
)
func TestWireGuardObfuscator_Obfuscate(t *testing.T) {
testObfuscate(t, device.MessageInitiationType, device.MessageInitiationSize, true)
testObfuscate(t, device.MessageInitiationType, device.MessageInitiationSize, false)
testObfuscate(t, device.MessageResponseType, device.MessageResponseSize, true)
testObfuscate(t, device.MessageResponseType, device.MessageResponseSize, false)
testObfuscate(t, device.MessageCookieReplyType, device.MessageCookieReplySize, false)
for i := device.MinMessageSize; i <= 1500; i++ {
testObfuscate(t, device.MessageTransportType, i, false)
}
}
func testObfuscate(t *testing.T, messageType byte, messageLength int, allZeroMAC2 bool) {
var obfuscator WireGuardObfuscator
obfuscator.Initialize("test")
var p Packet
p.Data[0] = messageType
p.Data[1] = 0
p.Data[2] = 0
p.Data[3] = 0
p.Length = messageLength
_, _ = rand.Read(p.Data[4:p.Length])
if allZeroMAC2 {
switch messageType {
case device.MessageInitiationType:
mac2 := p.Data[kMessageInitiationTypeMAC2Offset:messageLength]
for i := range mac2 {
mac2[i] = 0
}
case device.MessageResponseType:
mac2 := p.Data[kMessageResponseTypeMAC2Offset:messageLength]
for i := range mac2 {
mac2[i] = 0
}
}
}
//t.Logf("origin packet: length=%d data=%v\n", p.Length, p.Data[:p.Length])
originPacket := p
p.Flags |= PacketFlagObfuscateBeforeSend
obfuscator.Obfuscate(&p)
//t.Logf("obfuscated packet: length=%d data=%v\n", p.Length, p.Data[:p.Length])
obfuscator.Deobfuscate(&p)
if p.Flags&PacketFlagDeobfuscatedAfterReceived == 0 {
t.Errorf("packet not deobfuscated")
}
packetEqual := func(lhs, rhs *Packet) bool {
if lhs.Length != rhs.Length {
return false
}
for i := 0; i < lhs.Length; i++ {
if lhs.Data[i] != rhs.Data[i] {
return false
}
}
return true
}
if !packetEqual(&originPacket, &p) {
t.Errorf("obfuscate/deobfuscate failed\n")
}
//t.Logf("deobfuscated packet: length=%d data=%v\n", p.Length, p.Data[:p.Length])
}
func BenchmarkWireGuardObfuscator_Obfuscate(b *testing.B) {
var obfuscator WireGuardObfuscator
obfuscator.Initialize("test")
var p Packet
p.Data[0] = 4
p.Data[1] = 0
p.Data[2] = 0
p.Data[3] = 0
p.Length = 1500
_, _ = rand.Read(p.Data[4:p.Length])
p.Flags |= PacketFlagObfuscateBeforeSend
originPacket := p
b.ResetTimer()
for i := 0; i < b.N; i++ {
b.StopTimer()
p = originPacket
b.StartTimer()
obfuscator.Obfuscate(&p)
}
}
func BenchmarkWireGuardObfuscator_Deobfuscate(b *testing.B) {
var obfuscator WireGuardObfuscator
obfuscator.Initialize("test")
var p Packet
p.Data[0] = 4
p.Data[1] = 0
p.Data[2] = 0
p.Data[3] = 0
p.Length = 1500
_, _ = rand.Read(p.Data[4:p.Length])
p.Flags |= PacketFlagObfuscateBeforeSend
obfuscator.Obfuscate(&p)
originPacket := p
b.ResetTimer()
for i := 0; i < b.N; i++ {
b.StopTimer()
p = originPacket
b.StartTimer()
obfuscator.Deobfuscate(&p)
}
}