/*
Copyright 2018 The Kubernetes 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.
*/

package annotations

import (
	"crypto/tls"
	"fmt"
	"net/http"
	"strings"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	"github.com/parnurzeal/gorequest"
	"k8s.io/ingress-nginx/test/e2e/framework"
)

var _ = framework.IngressNginxDescribe("Annotations - AuthTLS", func() {
	f := framework.NewDefaultFramework("authtls")

	BeforeEach(func() {
		f.NewEchoDeploymentWithReplicas(2)
	})

	AfterEach(func() {
	})

	It("should set valid auth-tls-secret", func() {
		host := "authtls.foo.com"
		nameSpace := f.IngressController.Namespace

		clientConfig, err := framework.CreateIngressMASecret(
			f.KubeClientSet,
			host,
			host,
			nameSpace)
		Expect(err).ToNot(HaveOccurred())

		annotations := map[string]string{
			"nginx.ingress.kubernetes.io/auth-tls-secret": nameSpace + "/" + host,
		}

		ing := framework.NewSingleIngressWithTLS(host, "/", host, nameSpace, "http-svc", 80, &annotations)
		f.EnsureIngress(ing)

		// Since we can use the same certificate-chain for tls as well as mutual-auth, we will check all values
		sslCertDirective := fmt.Sprintf("ssl_certificate /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)
		sslKeyDirective := fmt.Sprintf("ssl_certificate_key /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)
		sslClientCertDirective := fmt.Sprintf("ssl_client_certificate /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)

		sslVerify := "ssl_verify_client on;"
		sslVerifyDepth := "ssl_verify_depth 1;"

		f.WaitForNginxServer(host,
			func(server string) bool {
				return strings.Contains(server, sslCertDirective) &&
					strings.Contains(server, sslKeyDirective) &&
					strings.Contains(server, sslClientCertDirective) &&
					strings.Contains(server, sslVerify) &&
					strings.Contains(server, sslVerifyDepth)
			})

		// Send Request without Client Certs
		req := gorequest.New()
		uri := "/"
		resp, _, errs := req.
			Get(f.IngressController.HTTPSURL+uri).
			TLSClientConfig(&tls.Config{ServerName: host, InsecureSkipVerify: true}).
			Set("Host", host).
			End()
		Expect(errs).Should(BeEmpty())
		Expect(resp.StatusCode).Should(Equal(http.StatusBadRequest))

		// Send Request Passing the Client Certs
		resp, _, errs = req.
			Get(f.IngressController.HTTPSURL+uri).
			TLSClientConfig(clientConfig).
			Set("Host", host).
			End()
		Expect(errs).Should(BeEmpty())
		Expect(resp.StatusCode).Should(Equal(http.StatusOK))
	})

	It("should set valid auth-tls-secret, sslVerify to off, and sslVerifyDepth to 2", func() {
		host := "authtls.foo.com"
		nameSpace := f.IngressController.Namespace

		_, err := framework.CreateIngressMASecret(
			f.KubeClientSet,
			host,
			host,
			nameSpace)
		Expect(err).ToNot(HaveOccurred())

		annotations := map[string]string{
			"nginx.ingress.kubernetes.io/auth-tls-secret":        nameSpace + "/" + host,
			"nginx.ingress.kubernetes.io/auth-tls-verify-client": "off",
			"nginx.ingress.kubernetes.io/auth-tls-verify-depth":  "2",
		}

		ing := framework.NewSingleIngressWithTLS(host, "/", host, nameSpace, "http-svc", 80, &annotations)
		f.EnsureIngress(ing)

		// Since we can use the same certificate-chain for tls as well as mutual-auth, we will check all values
		sslCertDirective := fmt.Sprintf("ssl_certificate /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)
		sslKeyDirective := fmt.Sprintf("ssl_certificate_key /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)
		sslClientCertDirective := fmt.Sprintf("ssl_client_certificate /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)

		sslVerify := "ssl_verify_client off;"
		sslVerifyDepth := "ssl_verify_depth 2;"

		f.WaitForNginxServer(host,
			func(server string) bool {
				return strings.Contains(server, sslCertDirective) && strings.Contains(server, sslKeyDirective) && strings.Contains(server, sslClientCertDirective) && strings.Contains(server, sslVerify) && strings.Contains(server, sslVerifyDepth)
			})

		// Send Request without Client Certs
		req := gorequest.New()
		uri := "/"
		resp, _, errs := req.
			Get(f.IngressController.HTTPSURL+uri).
			TLSClientConfig(&tls.Config{ServerName: host, InsecureSkipVerify: true}).
			Set("Host", host).
			End()
		Expect(errs).Should(BeEmpty())
		Expect(resp.StatusCode).Should(Equal(http.StatusOK))
	})

	It("should set valid auth-tls-secret, pass certificate to upstream, and error page", func() {
		host := "authtls.foo.com"
		nameSpace := f.IngressController.Namespace

		errorPath := "/error"

		clientConfig, err := framework.CreateIngressMASecret(
			f.KubeClientSet,
			host,
			host,
			nameSpace)
		Expect(err).ToNot(HaveOccurred())

		annotations := map[string]string{
			"nginx.ingress.kubernetes.io/auth-tls-secret":                       nameSpace + "/" + host,
			"nginx.ingress.kubernetes.io/auth-tls-error-page":                   f.IngressController.HTTPURL + errorPath,
			"nginx.ingress.kubernetes.io/auth-tls-pass-certificate-to-upstream": "true",
		}

		ing := framework.NewSingleIngressWithTLS(host, "/", host, nameSpace, "http-svc", 80, &annotations)
		f.EnsureIngress(ing)

		// Since we can use the same certificate-chain for tls as well as mutual-auth, we will check all values
		sslCertDirective := fmt.Sprintf("ssl_certificate /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)
		sslKeyDirective := fmt.Sprintf("ssl_certificate_key /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)
		sslClientCertDirective := fmt.Sprintf("ssl_client_certificate /etc/ingress-controller/ssl/%s-%s.pem;", nameSpace, host)

		sslVerify := "ssl_verify_client on;"
		sslVerifyDepth := "ssl_verify_depth 1;"
		sslErrorPage := fmt.Sprintf("error_page 495 496 = %s;", f.IngressController.HTTPURL+errorPath)
		sslUpstreamClientCert := "proxy_set_header ssl-client-cert $ssl_client_escaped_cert;"

		f.WaitForNginxServer(host,
			func(server string) bool {
				return strings.Contains(server, sslCertDirective) &&
					strings.Contains(server, sslKeyDirective) &&
					strings.Contains(server, sslClientCertDirective) &&
					strings.Contains(server, sslVerify) &&
					strings.Contains(server, sslVerifyDepth) &&
					strings.Contains(server, sslErrorPage) &&
					strings.Contains(server, sslUpstreamClientCert)
			})

		// Send Request without Client Certs
		req := gorequest.New()
		uri := "/"
		resp, _, errs := req.
			Get(f.IngressController.HTTPSURL+uri).
			TLSClientConfig(&tls.Config{ServerName: host, InsecureSkipVerify: true}).
			Set("Host", host).
			RedirectPolicy(noRedirectPolicyFunc).
			End()
		Expect(errs).Should(BeEmpty())
		Expect(resp.StatusCode).Should(Equal(http.StatusFound))
		Expect(resp.Header.Get("Location")).Should(Equal(f.IngressController.HTTPURL + errorPath))

		// Send Request Passing the Client Certs
		resp, _, errs = req.
			Get(f.IngressController.HTTPSURL+uri).
			TLSClientConfig(clientConfig).
			Set("Host", host).
			End()
		Expect(errs).Should(BeEmpty())
		Expect(resp.StatusCode).Should(Equal(http.StatusOK))
	})
})
