// Copyright Project Contour Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//go:build e2e
// +build e2e

package httpproxy

import (
	"crypto/tls"

	. "github.com/onsi/ginkgo"
	contourv1 "github.com/projectcontour/contour/apis/projectcontour/v1"
	"github.com/projectcontour/contour/test/e2e"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

func testHTTPSMisdirectedRequest(namespace string) {
	Specify("SNI and canonicalized hostname must match", func() {
		t := f.T()

		f.Fixtures.Echo.Deploy(namespace, "echo")
		f.Certs.CreateSelfSignedCert(namespace, "echo-cert", "echo", "https-misdirected-request.projectcontour.io")

		p := &contourv1.HTTPProxy{
			ObjectMeta: metav1.ObjectMeta{
				Namespace: namespace,
				Name:      "echo",
			},
			Spec: contourv1.HTTPProxySpec{
				VirtualHost: &contourv1.VirtualHost{
					Fqdn: "https-misdirected-request.projectcontour.io",
					TLS: &contourv1.TLS{
						SecretName: "echo",
					},
				},
				Routes: []contourv1.Route{
					{
						Services: []contourv1.Service{
							{
								Name: "echo",
								Port: 80,
							},
						},
					},
				},
			},
		}
		f.CreateHTTPProxyAndWaitFor(p, httpProxyValid)

		res, ok := f.HTTP.SecureRequestUntil(&e2e.HTTPSRequestOpts{
			Host:      p.Spec.VirtualHost.Fqdn,
			Condition: e2e.HasStatusCode(200),
		})
		require.NotNil(t, res, "request never succeeded")
		require.Truef(t, ok, "expected 200 response code, got %d", res.StatusCode)

		assert.Equal(t, "echo", f.GetEchoResponseBody(res.Body).Service)

		// Use a Host value that doesn't match the SNI value and verify
		// a 421 (Misdirected Request) is returned.
		res, ok = f.HTTP.SecureRequestUntil(&e2e.HTTPSRequestOpts{
			Host: "non-matching-host.projectcontour.io",
			TLSConfigOpts: []func(*tls.Config){
				e2e.OptSetSNI(p.Spec.VirtualHost.Fqdn),
			},
			Condition: e2e.HasStatusCode(421),
		})
		require.NotNil(t, res, "request never succeeded")
		require.Truef(t, ok, "expected 421 (Misdirected Request) response code, got %d", res.StatusCode)

		// The virtual host name is port-insensitive, so verify that we can
		// stuff any old port number in and still succeed.
		res, ok = f.HTTP.SecureRequestUntil(&e2e.HTTPSRequestOpts{
			Host: p.Spec.VirtualHost.Fqdn + ":9999",
			TLSConfigOpts: []func(*tls.Config){
				e2e.OptSetSNI(p.Spec.VirtualHost.Fqdn),
			},
			Condition: e2e.HasStatusCode(200),
		})
		require.NotNil(t, res, "request never succeeded")
		require.Truef(t, ok, "expected 200 response code, got %d", res.StatusCode)

		// Verify that the hostname match is case-insensitive.
		// The SNI server name match is still case sensitive,
		// see https://github.com/envoyproxy/envoy/issues/6199.
		res, ok = f.HTTP.SecureRequestUntil(&e2e.HTTPSRequestOpts{
			Host: "HTTPS-Misdirected-reQUest.projectcontour.io",
			TLSConfigOpts: []func(*tls.Config){
				e2e.OptSetSNI(p.Spec.VirtualHost.Fqdn),
			},
			Condition: e2e.HasStatusCode(200),
		})
		require.NotNil(t, res, "request never succeeded")
		require.Truef(t, ok, "expected 200 response code, got %d", res.StatusCode)
	})
}
