Rehandshaking (#838)

Co-authored-by: Brad Higgins <brad@defined.net>
Co-authored-by: Wade Simmons <wadey@slack-corp.com>

e2e/handshakes_test.go

@@ -4,6 +4,7 @@
 package e2e
 
 import (
+	"fmt"
 	"net"
 	"testing"
 	"time"
@@ -15,12 +16,13 @@ import (
 	"github.com/slackhq/nebula/iputil"
 	"github.com/slackhq/nebula/udp"
 	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v2"
 )
 
 func BenchmarkHotPath(b *testing.B) {
 	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
-	myControl, _, _ := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 1}, nil)
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+	myControl, _, _, _ := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
 
 	// Put their info in our lighthouse
 	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
@@ -43,8 +45,8 @@ func BenchmarkHotPath(b *testing.B) {
 
 func TestGoodHandshake(t *testing.T) {
 	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
-	myControl, myVpnIpNet, myUdpAddr := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 1}, nil)
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
 
 	// Put their info in our lighthouse
 	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
@@ -98,9 +100,9 @@ func TestWrongResponderHandshake(t *testing.T) {
 	// The IPs here are chosen on purpose:
 	// The current remote handling will sort by preference, public, and then lexically.
 	// So we need them to have a higher address than evil (we could apply a preference though)
-	myControl, myVpnIpNet, myUdpAddr := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 100}, nil)
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 99}, nil)
-	evilControl, evilVpnIp, evilUdpAddr := newSimpleServer(ca, caKey, "evil", net.IP{10, 0, 0, 2}, nil)
+	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 100}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 99}, nil)
+	evilControl, evilVpnIp, evilUdpAddr, _ := newSimpleServer(ca, caKey, "evil", net.IP{10, 0, 0, 2}, nil)
 
 	// Add their real udp addr, which should be tried after evil.
 	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
@@ -163,8 +165,8 @@ func TestStage1Race(t *testing.T) {
 	// But will eventually collapse down to a single tunnel
 
 	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
-	myControl, myVpnIpNet, myUdpAddr := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 1}, nil)
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
 
 	// Put their info in our lighthouse and vice versa
 	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
@@ -240,8 +242,8 @@ func TestStage1Race(t *testing.T) {
 
 func TestUncleanShutdownRaceLoser(t *testing.T) {
 	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
-	myControl, myVpnIpNet, myUdpAddr := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 1}, nil)
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
 
 	// Teach my how to get to the relay and that their can be reached via the relay
 	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
@@ -289,8 +291,8 @@ func TestUncleanShutdownRaceLoser(t *testing.T) {
 
 func TestUncleanShutdownRaceWinner(t *testing.T) {
 	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
-	myControl, myVpnIpNet, myUdpAddr := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 1}, nil)
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
 
 	// Teach my how to get to the relay and that their can be reached via the relay
 	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
@@ -340,9 +342,9 @@ func TestUncleanShutdownRaceWinner(t *testing.T) {
 
 func TestRelays(t *testing.T) {
 	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
-	myControl, myVpnIpNet, _ := newSimpleServer(ca, caKey, "me     ", net.IP{10, 0, 0, 1}, m{"relay": m{"use_relays": true}})
-	relayControl, relayVpnIpNet, relayUdpAddr := newSimpleServer(ca, caKey, "relay  ", net.IP{10, 0, 0, 128}, m{"relay": m{"am_relay": true}})
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them   ", net.IP{10, 0, 0, 2}, m{"relay": m{"use_relays": true}})
+	myControl, myVpnIpNet, _, _ := newSimpleServer(ca, caKey, "me     ", net.IP{10, 0, 0, 1}, m{"relay": m{"use_relays": true}})
+	relayControl, relayVpnIpNet, relayUdpAddr, _ := newSimpleServer(ca, caKey, "relay  ", net.IP{10, 0, 0, 128}, m{"relay": m{"am_relay": true}})
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them   ", net.IP{10, 0, 0, 2}, m{"relay": m{"use_relays": true}})
 
 	// Teach my how to get to the relay and that their can be reached via the relay
 	myControl.InjectLightHouseAddr(relayVpnIpNet.IP, relayUdpAddr)
@@ -371,9 +373,9 @@ func TestRelays(t *testing.T) {
 func TestStage1RaceRelays(t *testing.T) {
 	//NOTE: this is a race between me and relay resulting in a full tunnel from me to them via relay
 	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
-	myControl, myVpnIpNet, myUdpAddr := newSimpleServer(ca, caKey, "me     ", net.IP{10, 0, 0, 1}, m{"relay": m{"use_relays": true}})
-	relayControl, relayVpnIpNet, relayUdpAddr := newSimpleServer(ca, caKey, "relay  ", net.IP{10, 0, 0, 128}, m{"relay": m{"am_relay": true}})
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them   ", net.IP{10, 0, 0, 2}, m{"relay": m{"use_relays": true}})
+	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(ca, caKey, "me     ", net.IP{10, 0, 0, 1}, m{"relay": m{"use_relays": true}})
+	relayControl, relayVpnIpNet, relayUdpAddr, _ := newSimpleServer(ca, caKey, "relay  ", net.IP{10, 0, 0, 128}, m{"relay": m{"am_relay": true}})
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them   ", net.IP{10, 0, 0, 2}, m{"relay": m{"use_relays": true}})
 
 	// Teach my how to get to the relay and that their can be reached via the relay
 	myControl.InjectLightHouseAddr(relayVpnIpNet.IP, relayUdpAddr)
@@ -418,9 +420,9 @@ func TestStage1RaceRelays(t *testing.T) {
 func TestStage1RaceRelays2(t *testing.T) {
 	//NOTE: this is a race between me and relay resulting in a full tunnel from me to them via relay
 	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
-	myControl, myVpnIpNet, myUdpAddr := newSimpleServer(ca, caKey, "me     ", net.IP{10, 0, 0, 1}, m{"relay": m{"use_relays": true}})
-	relayControl, relayVpnIpNet, relayUdpAddr := newSimpleServer(ca, caKey, "relay  ", net.IP{10, 0, 0, 128}, m{"relay": m{"am_relay": true}})
-	theirControl, theirVpnIpNet, theirUdpAddr := newSimpleServer(ca, caKey, "them   ", net.IP{10, 0, 0, 2}, m{"relay": m{"use_relays": true}})
+	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(ca, caKey, "me     ", net.IP{10, 0, 0, 1}, m{"relay": m{"use_relays": true}})
+	relayControl, relayVpnIpNet, relayUdpAddr, _ := newSimpleServer(ca, caKey, "relay  ", net.IP{10, 0, 0, 128}, m{"relay": m{"am_relay": true}})
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them   ", net.IP{10, 0, 0, 2}, m{"relay": m{"use_relays": true}})
 	l := NewTestLogger()
 
 	// Teach my how to get to the relay and that their can be reached via the relay
@@ -503,5 +505,366 @@ func TestStage1RaceRelays2(t *testing.T) {
 	//
 	////TODO: assert hostmaps
 }
+func TestRehandshakingRelays(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIpNet, _, _ := newSimpleServer(ca, caKey, "me     ", net.IP{10, 0, 0, 1}, m{"relay": m{"use_relays": true}})
+	relayControl, relayVpnIpNet, relayUdpAddr, relayConfig := newSimpleServer(ca, caKey, "relay  ", net.IP{10, 0, 0, 128}, m{"relay": m{"am_relay": true}})
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them   ", net.IP{10, 0, 0, 2}, m{"relay": m{"use_relays": true}})
 
+	// Teach my how to get to the relay and that their can be reached via the relay
+	myControl.InjectLightHouseAddr(relayVpnIpNet.IP, relayUdpAddr)
+	myControl.InjectRelays(theirVpnIpNet.IP, []net.IP{relayVpnIpNet.IP})
+	relayControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
+
+	// Build a router so we don't have to reason who gets which packet
+	r := router.NewR(t, myControl, relayControl, theirControl)
+	defer r.RenderFlow()
+
+	// Start the servers
+	myControl.Start()
+	relayControl.Start()
+	theirControl.Start()
+
+	t.Log("Trigger a handshake from me to them via the relay")
+	myControl.InjectTunUDPPacket(theirVpnIpNet.IP, 80, 80, []byte("Hi from me"))
+
+	p := r.RouteForAllUntilTxTun(theirControl)
+	r.Log("Assert the tunnel works")
+	assertUdpPacket(t, []byte("Hi from me"), p, myVpnIpNet.IP, theirVpnIpNet.IP, 80, 80)
+	r.RenderHostmaps("working hostmaps", myControl, relayControl, theirControl)
+
+	// When I update the certificate for the relay, both me and them will have 2 host infos for the relay,
+	// and the main host infos will not have any relay state to handle the me<->relay<->them tunnel.
+	r.Log("Renew relay certificate and spin until me and them sees it")
+	_, _, myNextPrivKey, myNextPEM := newTestCert(ca, caKey, "relay", time.Now(), time.Now().Add(5*time.Minute), relayVpnIpNet, nil, []string{"new group"})
+
+	caB, err := ca.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	relayConfig.Settings["pki"] = m{
+		"ca":   string(caB),
+		"cert": string(myNextPEM),
+		"key":  string(myNextPrivKey),
+	}
+	rc, err := yaml.Marshal(relayConfig.Settings)
+	assert.NoError(t, err)
+	relayConfig.ReloadConfigString(string(rc))
+
+	for {
+		r.Log("Assert the tunnel works between myVpnIpNet and relayVpnIpNet")
+		assertTunnel(t, myVpnIpNet.IP, relayVpnIpNet.IP, myControl, relayControl, r)
+		c := myControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(relayVpnIpNet.IP), false)
+		if len(c.Cert.Details.Groups) != 0 {
+			// We have a new certificate now
+			r.Log("Certificate between my and relay is updated!")
+			break
+		}
+
+		time.Sleep(time.Second)
+	}
+
+	for {
+		r.Log("Assert the tunnel works between theirVpnIpNet and relayVpnIpNet")
+		assertTunnel(t, theirVpnIpNet.IP, relayVpnIpNet.IP, theirControl, relayControl, r)
+		c := theirControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(relayVpnIpNet.IP), false)
+		if len(c.Cert.Details.Groups) != 0 {
+			// We have a new certificate now
+			r.Log("Certificate between their and relay is updated!")
+			break
+		}
+
+		time.Sleep(time.Second)
+	}
+
+	r.Log("Assert the relay tunnel still works")
+	assertTunnel(t, theirVpnIpNet.IP, myVpnIpNet.IP, theirControl, myControl, r)
+	r.RenderHostmaps("working hostmaps", myControl, relayControl, theirControl)
+	// We should have two hostinfos on all sides
+	for len(myControl.GetHostmap().Indexes) != 2 {
+		t.Logf("Waiting for myControl hostinfos (%v != 2) to get cleaned up from lack of use...", len(myControl.GetHostmap().Indexes))
+		r.Log("Assert the relay tunnel still works")
+		assertTunnel(t, theirVpnIpNet.IP, myVpnIpNet.IP, theirControl, myControl, r)
+		r.Log("yupitdoes")
+		time.Sleep(time.Second)
+	}
+	t.Logf("myControl hostinfos got cleaned up!")
+	for len(theirControl.GetHostmap().Indexes) != 2 {
+		t.Logf("Waiting for theirControl hostinfos (%v != 2) to get cleaned up from lack of use...", len(theirControl.GetHostmap().Indexes))
+		r.Log("Assert the relay tunnel still works")
+		assertTunnel(t, theirVpnIpNet.IP, myVpnIpNet.IP, theirControl, myControl, r)
+		r.Log("yupitdoes")
+		time.Sleep(time.Second)
+	}
+	t.Logf("theirControl hostinfos got cleaned up!")
+	for len(relayControl.GetHostmap().Indexes) != 2 {
+		t.Logf("Waiting for relayControl hostinfos (%v != 2) to get cleaned up from lack of use...", len(relayControl.GetHostmap().Indexes))
+		r.Log("Assert the relay tunnel still works")
+		assertTunnel(t, theirVpnIpNet.IP, myVpnIpNet.IP, theirControl, myControl, r)
+		r.Log("yupitdoes")
+		time.Sleep(time.Second)
+	}
+	t.Logf("relayControl hostinfos got cleaned up!")
+}
+
+func TestRehandshaking(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIpNet, myUdpAddr, myConfig := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 2}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, theirConfig := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 1}, nil)
+
+	// Put their info in our lighthouse and vice versa
+	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
+	theirControl.InjectLightHouseAddr(myVpnIpNet.IP, myUdpAddr)
+
+	// Build a router so we don't have to reason who gets which packet
+	r := router.NewR(t, myControl, theirControl)
+	defer r.RenderFlow()
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+
+	t.Log("Stand up a tunnel between me and them")
+	assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+
+	r.RenderHostmaps("Starting hostmaps", myControl, theirControl)
+
+	r.Log("Renew my certificate and spin until their sees it")
+	_, _, myNextPrivKey, myNextPEM := newTestCert(ca, caKey, "me", time.Now(), time.Now().Add(5*time.Minute), myVpnIpNet, nil, []string{"new group"})
+
+	caB, err := ca.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	myConfig.Settings["pki"] = m{
+		"ca":   string(caB),
+		"cert": string(myNextPEM),
+		"key":  string(myNextPrivKey),
+	}
+	rc, err := yaml.Marshal(myConfig.Settings)
+	assert.NoError(t, err)
+	myConfig.ReloadConfigString(string(rc))
+
+	for {
+		assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+		c := theirControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(myVpnIpNet.IP), false)
+		if len(c.Cert.Details.Groups) != 0 {
+			// We have a new certificate now
+			break
+		}
+
+		time.Sleep(time.Second)
+	}
+
+	// Flip their firewall to only allowing the new group to catch the tunnels reverting incorrectly
+	rc, err = yaml.Marshal(theirConfig.Settings)
+	assert.NoError(t, err)
+	var theirNewConfig m
+	assert.NoError(t, yaml.Unmarshal(rc, &theirNewConfig))
+	theirFirewall := theirNewConfig["firewall"].(map[interface{}]interface{})
+	theirFirewall["inbound"] = []m{{
+		"proto": "any",
+		"port":  "any",
+		"group": "new group",
+	}}
+	rc, err = yaml.Marshal(theirNewConfig)
+	assert.NoError(t, err)
+	theirConfig.ReloadConfigString(string(rc))
+
+	r.Log("Spin until there is only 1 tunnel")
+	for len(myControl.GetHostmap().Indexes)+len(theirControl.GetHostmap().Indexes) > 2 {
+		assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+		t.Log("Connection manager hasn't ticked yet")
+		time.Sleep(time.Second)
+	}
+
+	assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+	myFinalHostmapHosts := myControl.ListHostmapHosts(false)
+	myFinalHostmapIndexes := myControl.ListHostmapIndexes(false)
+	theirFinalHostmapHosts := theirControl.ListHostmapHosts(false)
+	theirFinalHostmapIndexes := theirControl.ListHostmapIndexes(false)
+
+	// Make sure the correct tunnel won
+	c := theirControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(myVpnIpNet.IP), false)
+	assert.Contains(t, c.Cert.Details.Groups, "new group")
+
+	// We should only have a single tunnel now on both sides
+	assert.Len(t, myFinalHostmapHosts, 1)
+	assert.Len(t, theirFinalHostmapHosts, 1)
+	assert.Len(t, myFinalHostmapIndexes, 1)
+	assert.Len(t, theirFinalHostmapIndexes, 1)
+
+	r.RenderHostmaps("Final hostmaps", myControl, theirControl)
+
+	myControl.Stop()
+	theirControl.Stop()
+}
+
+func TestRehandshakingLoser(t *testing.T) {
+	// The purpose of this test is that the race loser renews their certificate and rehandshakes. The final tunnel
+	// Should be the one with the new certificate
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIpNet, myUdpAddr, myConfig := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 2}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, theirConfig := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 1}, nil)
+
+	// Put their info in our lighthouse and vice versa
+	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
+	theirControl.InjectLightHouseAddr(myVpnIpNet.IP, myUdpAddr)
+
+	// Build a router so we don't have to reason who gets which packet
+	r := router.NewR(t, myControl, theirControl)
+	defer r.RenderFlow()
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+
+	t.Log("Stand up a tunnel between me and them")
+	assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+
+	tt1 := myControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(theirVpnIpNet.IP), false)
+	tt2 := theirControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(myVpnIpNet.IP), false)
+	fmt.Println(tt1.LocalIndex, tt2.LocalIndex)
+
+	r.RenderHostmaps("Starting hostmaps", myControl, theirControl)
+
+	r.Log("Renew their certificate and spin until mine sees it")
+	_, _, theirNextPrivKey, theirNextPEM := newTestCert(ca, caKey, "them", time.Now(), time.Now().Add(5*time.Minute), theirVpnIpNet, nil, []string{"their new group"})
+
+	caB, err := ca.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	theirConfig.Settings["pki"] = m{
+		"ca":   string(caB),
+		"cert": string(theirNextPEM),
+		"key":  string(theirNextPrivKey),
+	}
+	rc, err := yaml.Marshal(theirConfig.Settings)
+	assert.NoError(t, err)
+	theirConfig.ReloadConfigString(string(rc))
+
+	for {
+		assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+		theirCertInMe := myControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(theirVpnIpNet.IP), false)
+
+		_, theirNewGroup := theirCertInMe.Cert.Details.InvertedGroups["their new group"]
+		if theirNewGroup {
+			break
+		}
+
+		time.Sleep(time.Second)
+	}
+
+	// Flip my firewall to only allowing the new group to catch the tunnels reverting incorrectly
+	rc, err = yaml.Marshal(myConfig.Settings)
+	assert.NoError(t, err)
+	var myNewConfig m
+	assert.NoError(t, yaml.Unmarshal(rc, &myNewConfig))
+	theirFirewall := myNewConfig["firewall"].(map[interface{}]interface{})
+	theirFirewall["inbound"] = []m{{
+		"proto": "any",
+		"port":  "any",
+		"group": "their new group",
+	}}
+	rc, err = yaml.Marshal(myNewConfig)
+	assert.NoError(t, err)
+	myConfig.ReloadConfigString(string(rc))
+
+	r.Log("Spin until there is only 1 tunnel")
+	for len(myControl.GetHostmap().Indexes)+len(theirControl.GetHostmap().Indexes) > 2 {
+		assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+		t.Log("Connection manager hasn't ticked yet")
+		time.Sleep(time.Second)
+	}
+
+	assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+	myFinalHostmapHosts := myControl.ListHostmapHosts(false)
+	myFinalHostmapIndexes := myControl.ListHostmapIndexes(false)
+	theirFinalHostmapHosts := theirControl.ListHostmapHosts(false)
+	theirFinalHostmapIndexes := theirControl.ListHostmapIndexes(false)
+
+	// Make sure the correct tunnel won
+	theirCertInMe := myControl.GetHostInfoByVpnIp(iputil.Ip2VpnIp(theirVpnIpNet.IP), false)
+	assert.Contains(t, theirCertInMe.Cert.Details.Groups, "their new group")
+
+	// We should only have a single tunnel now on both sides
+	assert.Len(t, myFinalHostmapHosts, 1)
+	assert.Len(t, theirFinalHostmapHosts, 1)
+	assert.Len(t, myFinalHostmapIndexes, 1)
+	assert.Len(t, theirFinalHostmapIndexes, 1)
+
+	r.RenderHostmaps("Final hostmaps", myControl, theirControl)
+	myControl.Stop()
+	theirControl.Stop()
+}
+
+func TestRaceRegression(t *testing.T) {
+	// This test forces stage 1, stage 2, stage 1 to be received by me from them
+	// We had a bug where we were not finding the duplicate handshake and responding to the final stage 1 which
+	// caused a cross-linked hostinfo
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 1}, nil)
+	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2}, nil)
+
+	// Put their info in our lighthouse
+	myControl.InjectLightHouseAddr(theirVpnIpNet.IP, theirUdpAddr)
+	theirControl.InjectLightHouseAddr(myVpnIpNet.IP, myUdpAddr)
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+
+	//them rx stage:1 initiatorIndex=642843150 responderIndex=0
+	//me rx   stage:1 initiatorIndex=120607833 responderIndex=0
+	//them rx stage:1 initiatorIndex=642843150 responderIndex=0
+	//me rx   stage:2 initiatorIndex=642843150 responderIndex=3701775874
+	//me rx   stage:1 initiatorIndex=120607833 responderIndex=0
+	//them rx stage:2 initiatorIndex=120607833 responderIndex=4209862089
+
+	t.Log("Start both handshakes")
+	myControl.InjectTunUDPPacket(theirVpnIpNet.IP, 80, 80, []byte("Hi from me"))
+	theirControl.InjectTunUDPPacket(myVpnIpNet.IP, 80, 80, []byte("Hi from them"))
+
+	t.Log("Get both stage 1")
+	myStage1ForThem := myControl.GetFromUDP(true)
+	theirStage1ForMe := theirControl.GetFromUDP(true)
+
+	t.Log("Inject them in a special way")
+	theirControl.InjectUDPPacket(myStage1ForThem)
+	myControl.InjectUDPPacket(theirStage1ForMe)
+	theirControl.InjectUDPPacket(myStage1ForThem)
+
+	//TODO: ensure stage 2
+	t.Log("Get both stage 2")
+	myStage2ForThem := myControl.GetFromUDP(true)
+	theirStage2ForMe := theirControl.GetFromUDP(true)
+
+	t.Log("Inject them in a special way again")
+	myControl.InjectUDPPacket(theirStage2ForMe)
+	myControl.InjectUDPPacket(theirStage1ForMe)
+	theirControl.InjectUDPPacket(myStage2ForThem)
+
+	r := router.NewR(t, myControl, theirControl)
+	defer r.RenderFlow()
+
+	t.Log("Flush the packets")
+	r.RouteForAllUntilTxTun(myControl)
+	r.RouteForAllUntilTxTun(theirControl)
+	r.RenderHostmaps("Starting hostmaps", myControl, theirControl)
+
+	t.Log("Make sure the tunnel still works")
+	assertTunnel(t, myVpnIpNet.IP, theirVpnIpNet.IP, myControl, theirControl, r)
+
+	myControl.Stop()
+	theirControl.Stop()
+}
+
+//TODO: test
+// Race winner renews and handshakes
+// Race loser renews and handshakes
+// Does race winner repin the cert to old?
 //TODO: add a test with many lies