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Support HostSNIRegexp in GatewayAPI TLS routes

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This commit is contained in:
Douglas De Toni Machado 2022-12-12 12:30:05 -03:00 committed by GitHub
parent 3eeea2bb2b
commit a08a428787
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 45 additions and 24 deletions
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2
pkg/provider/kubernetes/gateway/fixtures/tlsroute/with_invalid_SNI_matching.yml
View file

@ -39,7 +39,7 @@ spec:
kind: Gateway
group: gateway.networking.k8s.io
hostnames:
- "*.foo.bar"
- "*.foo.*.bar"
rules:
- backendRefs:
- name: whoamitcp

43
pkg/provider/kubernetes/gateway/kubernetes.go
View file

@ -839,7 +839,7 @@ func gatewayTCPRouteToTCPConf(ctx context.Context, ep string, listener v1alpha2.
}
router := dynamic.TCPRouter{
Rule: "HostSNI(`*`)", // Gateway listener hostname not available in TCP
Rule: "HostSNI(`*`)",
EntryPoints: []string{ep},
}
@ -970,8 +970,16 @@ func gatewayTLSRouteToTCPConf(ctx context.Context, ep string, listener v1alpha2.
hostnames := matchingHostnames(listener, route.Spec.Hostnames)
if len(hostnames) == 0 && listener.Hostname != nil && *listener.Hostname != "" && len(route.Spec.Hostnames) > 0 {
// TODO update the corresponding route parent status
// https://gateway-api.sigs.k8s.io/v1alpha2/references/spec/#gateway.networking.k8s.io/v1alpha2.TLSRoute
for _, parent := range route.Status.Parents {
parent.Conditions = append(parent.Conditions, metav1.Condition{
Type: string(v1alpha2.GatewayClassConditionStatusAccepted),
Status: metav1.ConditionFalse,
Reason: string(v1alpha2.ListenerReasonRouteConflict),
Message: fmt.Sprintf("No hostname match between listener: %v and route: %v", listener.Hostname, route.Spec.Hostnames),
LastTransitionTime: metav1.Now(),
})
}
continue
}
@ -1207,7 +1215,7 @@ func hostRule(hostnames []v1alpha2.Hostname) (string, error) {
}
func hostSNIRule(hostnames []v1alpha2.Hostname) (string, error) {
var matchers []string
rules := make([]string, 0, len(hostnames))
uniqHostnames := map[v1alpha2.Hostname]struct{}{}
for _, hostname := range hostnames {
@ -1219,25 +1227,28 @@ func hostSNIRule(hostnames []v1alpha2.Hostname) (string, error) {
continue
}
h := string(hostname)
host := string(hostname)
uniqHostnames[hostname] = struct{}{}
// TODO support wildcard hostnames with an HostSNI regexp matcher
if strings.Contains(h, "*") {
return "", fmt.Errorf("wildcard hostname is not supported: %q", h)
wildcard := strings.Count(host, "*")
if wildcard == 0 {
rules = append(rules, fmt.Sprintf("HostSNI(`%s`)", host))
continue
}
matchers = append(matchers, fmt.Sprintf("HostSNI(`%s`)", h))
uniqHostnames[hostname] = struct{}{}
if !strings.HasPrefix(host, "*.") || wildcard > 1 {
return "", fmt.Errorf("invalid rule: %q", host)
}
host = strings.Replace(regexp.QuoteMeta(host), `\*\.`, `[a-zA-Z0-9-]+\.`, 1)
rules = append(rules, fmt.Sprintf("HostSNIRegexp(`^%s$`)", host))
}
switch len(matchers) {
case 0:
if len(hostnames) == 0 || len(rules) == 0 {
return "HostSNI(`*`)", nil
case 1:
return matchers[0], nil
default:
return fmt.Sprintf("(%s)", strings.Join(matchers, " || ")), nil
}
return strings.Join(rules, " || "), nil
}
func extractRule(routeRule v1alpha2.HTTPRouteRule, hostRule string) (string, error) {

24
pkg/provider/kubernetes/gateway/kubernetes_test.go
View file

@ -3076,10 +3076,10 @@ func TestLoadTLSRoutes(t *testing.T) {
},
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{
"default-tls-app-1-my-gateway-tls-dfc5c7506ac1b172c8b7": {
"default-tls-app-1-my-gateway-tls-d5342d75658583f03593": {
EntryPoints: []string{"tls"},
Service: "default-tls-app-1-my-gateway-tls-dfc5c7506ac1b172c8b7-wrr-0",
Rule: "(HostSNI(`foo.example.com`) || HostSNI(`bar.example.com`))",
Service: "default-tls-app-1-my-gateway-tls-d5342d75658583f03593-wrr-0",
Rule: "HostSNI(`foo.example.com`) || HostSNI(`bar.example.com`)",
TLS: &dynamic.RouterTCPTLSConfig{
Passthrough: true,
},
@ -3087,7 +3087,7 @@ func TestLoadTLSRoutes(t *testing.T) {
},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{
"default-tls-app-1-my-gateway-tls-dfc5c7506ac1b172c8b7-wrr-0": {
"default-tls-app-1-my-gateway-tls-d5342d75658583f03593-wrr-0": {
Weighted: &dynamic.TCPWeightedRoundRobin{
Services: []dynamic.TCPWRRService{
{
@ -4780,6 +4780,11 @@ func Test_hostSNIRule(t *testing.T) {
hostnames: []v1alpha2.Hostname{"*"},
expectError: true,
},
{
desc: "Supported wildcard",
hostnames: []v1alpha2.Hostname{"*.foo"},
expectedRule: "HostSNIRegexp(`^[a-zA-Z0-9-]+\\.foo$`)",
},
{
desc: "Multiple malformed wildcard",
hostnames: []v1alpha2.Hostname{"*.foo.*"},
@ -4788,7 +4793,7 @@ func Test_hostSNIRule(t *testing.T) {
{
desc: "Some empty hostnames",
hostnames: []v1alpha2.Hostname{"foo", "", "bar"},
expectedRule: "(HostSNI(`foo`) || HostSNI(`bar`))",
expectedRule: "HostSNI(`foo`) || HostSNI(`bar`)",
},
{
desc: "Valid hostname",
@ -4798,12 +4803,17 @@ func Test_hostSNIRule(t *testing.T) {
{
desc: "Multiple valid hostnames",
hostnames: []v1alpha2.Hostname{"foo", "bar"},
expectedRule: "(HostSNI(`foo`) || HostSNI(`bar`))",
expectedRule: "HostSNI(`foo`) || HostSNI(`bar`)",
},
{
desc: "Multiple valid hostnames with wildcard",
hostnames: []v1alpha2.Hostname{"bar.foo", "foo.foo", "*.foo"},
expectedRule: "HostSNI(`bar.foo`) || HostSNI(`foo.foo`) || HostSNIRegexp(`^[a-zA-Z0-9-]+\\.foo$`)",
},
{
desc: "Multiple overlapping hostnames",
hostnames: []v1alpha2.Hostname{"foo", "bar", "foo", "baz"},
expectedRule: "(HostSNI(`foo`) || HostSNI(`bar`) || HostSNI(`baz`))",
expectedRule: "HostSNI(`foo`) || HostSNI(`bar`) || HostSNI(`baz`)",
},
}