Start of end to end testing with a good handshake between two nodes (#425)
This commit is contained in:
Nathan Brown
60
e2e/handshakes_test.go
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60
e2e/handshakes_test.go
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// +build e2e_testing
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package e2e
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import (
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"net"
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"testing"
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"time"
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)
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func TestGoodHandshake(t *testing.T) {
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ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
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defMask := net.IPMask{0, 0, 0, 0}
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myUdpAddr := &net.UDPAddr{IP: net.IP{10, 0, 0, 1}, Port: 4242}
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myVpnIpNet := &net.IPNet{IP: net.IP{10, 128, 0, 1}, Mask: defMask}
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myControl := newSimpleServer(ca, caKey, "me", myUdpAddr, myVpnIpNet)
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theirUdpAddr := &net.UDPAddr{IP: net.IP{10, 0, 0, 2}, Port: 4242}
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theirVpnIpNet := &net.IPNet{IP: net.IP{10, 128, 0, 2}, Mask: defMask}
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theirControl := newSimpleServer(ca, caKey, "them", theirUdpAddr, theirVpnIpNet)
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// Put their info in our lighthouse
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myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
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// Start the servers
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myControl.Start()
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theirControl.Start()
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// Send a udp packet through to begin standing up the tunnel, this should come out the other side
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myControl.InjectTunUDPPacket(theirVpnIpNet.IP, 80, 80, []byte("Hi from me"))
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// Have them consume my stage 0 packet. They have a tunnel now
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theirControl.InjectUDPPacket(myControl.GetFromUDP(true))
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// Have me consume their stage 1 packet. I have a tunnel now
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myControl.InjectUDPPacket(theirControl.GetFromUDP(true))
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// Wait until we see my cached packet come through
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myControl.WaitForType(1, 0, theirControl)
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// Make sure our host infos are correct
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assertHostInfoPair(t, myUdpAddr, theirUdpAddr, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl)
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// Get that cached packet and make sure it looks right
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myCachedPacket := theirControl.GetFromTun(true)
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assertUdpPacket(t, []byte("Hi from me"), myCachedPacket, myVpnIpNet.IP, theirVpnIpNet.IP, 80, 80)
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// Send a packet from them to me
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theirControl.InjectTunUDPPacket(myVpnIpNet.IP, 80, 80, []byte("Hi from them"))
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myControl.InjectUDPPacket(theirControl.GetFromUDP(true))
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theirPacket := myControl.GetFromTun(true)
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assertUdpPacket(t, []byte("Hi from them"), theirPacket, theirVpnIpNet.IP, myVpnIpNet.IP, 80, 80)
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// And once more from me to them
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myControl.InjectTunUDPPacket(theirVpnIpNet.IP, 80, 80, []byte("Hello again from me"))
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theirControl.InjectUDPPacket(myControl.GetFromUDP(true))
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myPacket := theirControl.GetFromTun(true)
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assertUdpPacket(t, []byte("Hello again from me"), myPacket, myVpnIpNet.IP, theirVpnIpNet.IP, 80, 80)
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}
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252
e2e/helpers_test.go
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252
e2e/helpers_test.go
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// +build e2e_testing
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package e2e
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import (
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"crypto/rand"
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"encoding/binary"
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"fmt"
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"io"
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"net"
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"testing"
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"time"
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"github.com/google/gopacket"
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"github.com/google/gopacket/layers"
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"github.com/sirupsen/logrus"
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"github.com/slackhq/nebula"
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"github.com/slackhq/nebula/cert"
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"github.com/stretchr/testify/assert"
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"golang.org/x/crypto/curve25519"
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"golang.org/x/crypto/ed25519"
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"gopkg.in/yaml.v2"
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)
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type m map[string]interface{}
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// newSimpleServer creates a nebula instance with many assumptions
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func newSimpleServer(caCrt *cert.NebulaCertificate, caKey []byte, name string, listenAddr *net.UDPAddr, vpnIp *net.IPNet) *nebula.Control {
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l := logrus.New()
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_, _, myPrivKey, myPEM := newTestCert(caCrt, caKey, name, time.Now(), time.Now().Add(5*time.Minute), vpnIp, nil, []string{})
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caB, err := caCrt.MarshalToPEM()
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if err != nil {
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panic(err)
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}
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mc := m{
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"pki": m{
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"ca": string(caB),
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"cert": string(myPEM),
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"key": string(myPrivKey),
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},
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//"tun": m{"disabled": true},
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"firewall": m{
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"outbound": []m{{
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"proto": "any",
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"port": "any",
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"host": "any",
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}},
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"inbound": []m{{
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"proto": "any",
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"port": "any",
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"host": "any",
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}},
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},
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"listen": m{
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"host": listenAddr.IP.String(),
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"port": listenAddr.Port,
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},
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"logging": m{
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"timestamp_format": fmt.Sprintf("%v 15:04:05.000000", name),
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"level": "info",
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},
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}
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cb, err := yaml.Marshal(mc)
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if err != nil {
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panic(err)
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}
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config := nebula.NewConfig(l)
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config.LoadString(string(cb))
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control, err := nebula.Main(config, false, "e2e-test", l, nil)
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if err != nil {
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panic(err)
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}
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return control
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}
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// newTestCaCert will generate a CA cert
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func newTestCaCert(before, after time.Time, ips, subnets []*net.IPNet, groups []string) (*cert.NebulaCertificate, []byte, []byte, []byte) {
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pub, priv, err := ed25519.GenerateKey(rand.Reader)
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if before.IsZero() {
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before = time.Now().Add(time.Second * -60).Round(time.Second)
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}
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if after.IsZero() {
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after = time.Now().Add(time.Second * 60).Round(time.Second)
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}
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nc := &cert.NebulaCertificate{
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Details: cert.NebulaCertificateDetails{
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Name: "test ca",
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NotBefore: time.Unix(before.Unix(), 0),
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NotAfter: time.Unix(after.Unix(), 0),
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PublicKey: pub,
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IsCA: true,
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InvertedGroups: make(map[string]struct{}),
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},
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}
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if len(ips) > 0 {
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nc.Details.Ips = ips
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}
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if len(subnets) > 0 {
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nc.Details.Subnets = subnets
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}
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if len(groups) > 0 {
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nc.Details.Groups = groups
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}
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err = nc.Sign(priv)
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if err != nil {
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panic(err)
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}
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pem, err := nc.MarshalToPEM()
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if err != nil {
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panic(err)
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}
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return nc, pub, priv, pem
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}
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// newTestCert will generate a signed certificate with the provided details.
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// Expiry times are defaulted if you do not pass them in
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func newTestCert(ca *cert.NebulaCertificate, key []byte, name string, before, after time.Time, ip *net.IPNet, subnets []*net.IPNet, groups []string) (*cert.NebulaCertificate, []byte, []byte, []byte) {
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issuer, err := ca.Sha256Sum()
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if err != nil {
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panic(err)
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}
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if before.IsZero() {
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before = time.Now().Add(time.Second * -60).Round(time.Second)
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}
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if after.IsZero() {
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after = time.Now().Add(time.Second * 60).Round(time.Second)
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}
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pub, rawPriv := x25519Keypair()
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nc := &cert.NebulaCertificate{
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Details: cert.NebulaCertificateDetails{
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Name: name,
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Ips: []*net.IPNet{ip},
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Subnets: subnets,
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Groups: groups,
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NotBefore: time.Unix(before.Unix(), 0),
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NotAfter: time.Unix(after.Unix(), 0),
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PublicKey: pub,
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IsCA: false,
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Issuer: issuer,
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InvertedGroups: make(map[string]struct{}),
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},
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}
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err = nc.Sign(key)
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if err != nil {
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panic(err)
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}
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pem, err := nc.MarshalToPEM()
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if err != nil {
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panic(err)
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}
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return nc, pub, cert.MarshalX25519PrivateKey(rawPriv), pem
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}
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func x25519Keypair() ([]byte, []byte) {
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var pubkey, privkey [32]byte
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if _, err := io.ReadFull(rand.Reader, privkey[:]); err != nil {
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panic(err)
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}
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curve25519.ScalarBaseMult(&pubkey, &privkey)
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return pubkey[:], privkey[:]
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}
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func ip2int(ip []byte) uint32 {
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if len(ip) == 16 {
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return binary.BigEndian.Uint32(ip[12:16])
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}
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return binary.BigEndian.Uint32(ip)
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}
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func int2ip(nn uint32) net.IP {
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ip := make(net.IP, 4)
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binary.BigEndian.PutUint32(ip, nn)
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return ip
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}
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func assertHostInfoPair(t *testing.T, addrA, addrB *net.UDPAddr, vpnIpA, vpnIpB net.IP, controlA, controlB *nebula.Control) {
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// Get both host infos
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hBinA := controlA.GetHostInfoByVpnIP(ip2int(vpnIpB), false)
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assert.NotNil(t, hBinA, "Host B was not found by vpnIP in controlA")
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hAinB := controlB.GetHostInfoByVpnIP(ip2int(vpnIpA), false)
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assert.NotNil(t, hAinB, "Host A was not found by vpnIP in controlB")
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// Check that both vpn and real addr are correct
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assert.Equal(t, vpnIpB, hBinA.VpnIP, "HostA VpnIp is wrong in controlB")
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assert.Equal(t, vpnIpA, hAinB.VpnIP, "HostB VpnIp is wrong in controlA")
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assert.Equal(t, addrB.IP.To16(), hBinA.CurrentRemote.IP.To16(), "HostA remote ip is wrong in controlB")
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assert.Equal(t, addrA.IP.To16(), hAinB.CurrentRemote.IP.To16(), "HostB remote ip is wrong in controlA")
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assert.Equal(t, uint16(addrA.Port), hBinA.CurrentRemote.Port, "HostA remote ip is wrong in controlB")
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assert.Equal(t, uint16(addrB.Port), hAinB.CurrentRemote.Port, "HostB remote ip is wrong in controlA")
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// Check that our indexes match
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assert.Equal(t, hBinA.LocalIndex, hAinB.RemoteIndex, "Host B local index does not match host A remote index")
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assert.Equal(t, hBinA.RemoteIndex, hAinB.LocalIndex, "Host B remote index does not match host A local index")
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//TODO: Would be nice to assert this memory
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//checkIndexes := func(name string, hm *HostMap, hi *HostInfo) {
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// hBbyIndex := hmA.Indexes[hBinA.localIndexId]
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// assert.NotNil(t, hBbyIndex, "Could not host info by local index in %s", name)
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// assert.Equal(t, &hBbyIndex, &hBinA, "%s Indexes map did not point to the right host info", name)
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//
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// //TODO: remote indexes are susceptible to collision
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// hBbyRemoteIndex := hmA.RemoteIndexes[hBinA.remoteIndexId]
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// assert.NotNil(t, hBbyIndex, "Could not host info by remote index in %s", name)
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// assert.Equal(t, &hBbyRemoteIndex, &hBinA, "%s RemoteIndexes did not point to the right host info", name)
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//}
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//
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//// Check hostmap indexes too
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//checkIndexes("hmA", hmA, hBinA)
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//checkIndexes("hmB", hmB, hAinB)
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}
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func assertUdpPacket(t *testing.T, expected, b []byte, fromIp, toIp net.IP, fromPort, toPort uint16) {
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packet := gopacket.NewPacket(b, layers.LayerTypeIPv4, gopacket.Lazy)
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v4 := packet.Layer(layers.LayerTypeIPv4).(*layers.IPv4)
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assert.NotNil(t, v4, "No ipv4 data found")
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assert.Equal(t, fromIp, v4.SrcIP, "Source ip was incorrect")
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assert.Equal(t, toIp, v4.DstIP, "Dest ip was incorrect")
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udp := packet.Layer(layers.LayerTypeUDP).(*layers.UDP)
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assert.NotNil(t, udp, "No udp data found")
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assert.Equal(t, fromPort, uint16(udp.SrcPort), "Source port was incorrect")
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assert.Equal(t, toPort, uint16(udp.DstPort), "Dest port was incorrect")
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data := packet.ApplicationLayer()
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assert.NotNil(t, data)
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assert.Equal(t, expected, data.Payload(), "Data was incorrect")
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}
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