wireguard-go/device/noise_test.go

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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2020 WireGuard LLC. All Rights Reserved.
*/
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package device
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import (
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"bytes"
"encoding/binary"
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"testing"
)
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func TestCurveWrappers(t *testing.T) {
sk1, err := newPrivateKey()
assertNil(t, err)
sk2, err := newPrivateKey()
assertNil(t, err)
pk1 := sk1.publicKey()
pk2 := sk2.publicKey()
ss1 := sk1.sharedSecret(pk2)
ss2 := sk2.sharedSecret(pk1)
if ss1 != ss2 {
t.Fatal("Failed to compute shared secet")
}
}
func TestNoiseHandshake(t *testing.T) {
dev1 := randDevice(t)
dev2 := randDevice(t)
defer dev1.Close()
defer dev2.Close()
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peer1, _ := dev2.NewPeer(dev1.staticIdentity.privateKey.publicKey())
peer2, _ := dev1.NewPeer(dev2.staticIdentity.privateKey.publicKey())
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assertEqual(
t,
peer1.handshake.precomputedStaticStatic[:],
peer2.handshake.precomputedStaticStatic[:],
)
/* simulate handshake */
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// initiation message
t.Log("exchange initiation message")
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msg1, err := dev1.CreateMessageInitiation(peer2)
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assertNil(t, err)
packet := make([]byte, 0, 256)
writer := bytes.NewBuffer(packet)
err = binary.Write(writer, binary.LittleEndian, msg1)
assertNil(t, err)
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peer := dev2.ConsumeMessageInitiation(msg1)
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if peer == nil {
t.Fatal("handshake failed at initiation message")
}
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assertEqual(
t,
peer1.handshake.chainKey[:],
peer2.handshake.chainKey[:],
)
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assertEqual(
t,
peer1.handshake.hash[:],
peer2.handshake.hash[:],
)
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// response message
t.Log("exchange response message")
msg2, err := dev2.CreateMessageResponse(peer1)
assertNil(t, err)
peer = dev1.ConsumeMessageResponse(msg2)
if peer == nil {
t.Fatal("handshake failed at response message")
}
assertEqual(
t,
peer1.handshake.chainKey[:],
peer2.handshake.chainKey[:],
)
assertEqual(
t,
peer1.handshake.hash[:],
peer2.handshake.hash[:],
)
// key pairs
t.Log("deriving keys")
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err = peer1.BeginSymmetricSession()
if err != nil {
t.Fatal("failed to derive keypair for peer 1", err)
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}
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err = peer2.BeginSymmetricSession()
if err != nil {
t.Fatal("failed to derive keypair for peer 2", err)
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}
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key1 := peer1.keypairs.loadNext()
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key2 := peer2.keypairs.current
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// encrypting / decryption test
t.Log("test key pairs")
func() {
testMsg := []byte("wireguard test message 1")
var err error
var out []byte
var nonce [12]byte
out = key1.send.Seal(out, nonce[:], testMsg, nil)
out, err = key2.receive.Open(out[:0], nonce[:], out, nil)
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assertNil(t, err)
assertEqual(t, out, testMsg)
}()
func() {
testMsg := []byte("wireguard test message 2")
var err error
var out []byte
var nonce [12]byte
out = key2.send.Seal(out, nonce[:], testMsg, nil)
out, err = key1.receive.Open(out[:0], nonce[:], out, nil)
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assertNil(t, err)
assertEqual(t, out, testMsg)
}()
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}