178 lines
3.3 KiB
Go
178 lines
3.3 KiB
Go
/* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
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*/
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package device
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import (
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"bytes"
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"encoding/binary"
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"testing"
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"golang.zx2c4.com/wireguard/conn"
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"golang.zx2c4.com/wireguard/tun/tuntest"
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)
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func TestCurveWrappers(t *testing.T) {
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sk1, err := newPrivateKey()
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assertNil(t, err)
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sk2, err := newPrivateKey()
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assertNil(t, err)
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pk1 := sk1.publicKey()
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pk2 := sk2.publicKey()
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ss1 := sk1.sharedSecret(pk2)
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ss2 := sk2.sharedSecret(pk1)
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if ss1 != ss2 {
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t.Fatal("Failed to compute shared secet")
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}
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}
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func randDevice(t *testing.T) *Device {
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sk, err := newPrivateKey()
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if err != nil {
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t.Fatal(err)
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}
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tun := tuntest.NewChannelTUN()
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logger := NewLogger(LogLevelError, "")
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device := NewDevice(tun.TUN(), conn.NewDefaultBind(), logger)
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device.SetPrivateKey(sk)
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return device
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}
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func assertNil(t *testing.T, err error) {
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if err != nil {
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t.Fatal(err)
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}
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}
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func assertEqual(t *testing.T, a, b []byte) {
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if !bytes.Equal(a, b) {
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t.Fatal(a, "!=", b)
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}
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}
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func TestNoiseHandshake(t *testing.T) {
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dev1 := randDevice(t)
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dev2 := randDevice(t)
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defer dev1.Close()
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defer dev2.Close()
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peer1, err := dev2.NewPeer(dev1.staticIdentity.privateKey.publicKey())
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if err != nil {
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t.Fatal(err)
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}
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peer2, err := dev1.NewPeer(dev2.staticIdentity.privateKey.publicKey())
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if err != nil {
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t.Fatal(err)
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}
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assertEqual(
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t,
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peer1.handshake.precomputedStaticStatic[:],
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peer2.handshake.precomputedStaticStatic[:],
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)
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/* simulate handshake */
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// initiation message
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t.Log("exchange initiation message")
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msg1, err := dev1.CreateMessageInitiation(peer2)
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assertNil(t, err)
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packet := make([]byte, 0, 256)
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writer := bytes.NewBuffer(packet)
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err = binary.Write(writer, binary.LittleEndian, msg1)
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assertNil(t, err)
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peer := dev2.ConsumeMessageInitiation(msg1)
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if peer == nil {
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t.Fatal("handshake failed at initiation message")
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}
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assertEqual(
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t,
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peer1.handshake.chainKey[:],
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peer2.handshake.chainKey[:],
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)
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assertEqual(
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t,
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peer1.handshake.hash[:],
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peer2.handshake.hash[:],
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)
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// response message
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t.Log("exchange response message")
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msg2, err := dev2.CreateMessageResponse(peer1)
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assertNil(t, err)
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peer = dev1.ConsumeMessageResponse(msg2)
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if peer == nil {
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t.Fatal("handshake failed at response message")
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}
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assertEqual(
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t,
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peer1.handshake.chainKey[:],
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peer2.handshake.chainKey[:],
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)
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assertEqual(
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t,
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peer1.handshake.hash[:],
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peer2.handshake.hash[:],
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)
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// key pairs
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t.Log("deriving keys")
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err = peer1.BeginSymmetricSession()
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if err != nil {
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t.Fatal("failed to derive keypair for peer 1", err)
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}
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err = peer2.BeginSymmetricSession()
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if err != nil {
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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
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t.Log("test key pairs")
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func() {
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testMsg := []byte("wireguard test message 1")
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var err error
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var out []byte
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var nonce [12]byte
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out = key1.send.Seal(out, nonce[:], testMsg, nil)
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out, err = key2.receive.Open(out[:0], nonce[:], out, nil)
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assertNil(t, err)
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assertEqual(t, out, testMsg)
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}()
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func() {
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testMsg := []byte("wireguard test message 2")
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var err error
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var out []byte
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var nonce [12]byte
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out = key2.send.Seal(out, nonce[:], testMsg, nil)
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out, err = key1.receive.Open(out[:0], nonce[:], out, nil)
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assertNil(t, err)
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assertEqual(t, out, testMsg)
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}()
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}
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