feat: add support for ingress e2e test framework (#133)

Signed-off-by: bitliu <bitliu@tencent.com>

test/ingress/conformance/utils/kubernetes/cert.go

@@ -0,0 +1,126 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// 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 kubernetes
+
+import (
+	"bytes"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"fmt"
+	"io"
+	"math/big"
+	"net"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	// ensure auth plugins are loaded
+	_ "k8s.io/client-go/plugin/pkg/client/auth"
+)
+
+const (
+	rsaBits  = 2048
+	validFor = 365 * 24 * time.Hour
+)
+
+// MustCreateSelfSignedCertSecret creates a self-signed SSL certificate and stores it in a secret
+func MustCreateSelfSignedCertSecret(t *testing.T, namespace, secretName string, hosts []string) *corev1.Secret {
+	require.Greater(t, len(hosts), 0, "require a non-empty hosts for Subject Alternate Name values")
+
+	var serverKey, serverCert bytes.Buffer
+
+	host := strings.Join(hosts, ",")
+
+	require.NoError(t, generateRSACert(host, &serverKey, &serverCert), "failed to generate RSA certificate")
+
+	data := map[string][]byte{
+		corev1.TLSCertKey:       serverCert.Bytes(),
+		corev1.TLSPrivateKeyKey: serverKey.Bytes(),
+	}
+
+	newSecret := &corev1.Secret{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: namespace,
+			Name:      secretName,
+		},
+		Type: corev1.SecretTypeTLS,
+		Data: data,
+	}
+
+	return newSecret
+}
+
+// generateRSACert generates a basic self signed certificate valir for a year
+func generateRSACert(host string, keyOut, certOut io.Writer) error {
+	priv, err := rsa.GenerateKey(rand.Reader, rsaBits)
+	if err != nil {
+		return fmt.Errorf("failed to generate key: %w", err)
+	}
+	notBefore := time.Now()
+	notAfter := notBefore.Add(validFor)
+
+	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
+	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
+
+	if err != nil {
+		return fmt.Errorf("failed to generate serial number: %w", err)
+	}
+
+	template := x509.Certificate{
+		SerialNumber: serialNumber,
+		Subject: pkix.Name{
+			CommonName:   "default",
+			Organization: []string{"Acme Co"},
+		},
+		NotBefore: notBefore,
+		NotAfter:  notAfter,
+
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+	}
+
+	hosts := strings.Split(host, ",")
+	for _, h := range hosts {
+		if ip := net.ParseIP(h); ip != nil {
+			template.IPAddresses = append(template.IPAddresses, ip)
+		} else {
+			template.DNSNames = append(template.DNSNames, h)
+		}
+	}
+
+	derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv)
+
+	if err != nil {
+		return fmt.Errorf("failed to create certificate: %w", err)
+	}
+
+	if err := pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}); err != nil {
+		return fmt.Errorf("failed creating cert: %w", err)
+	}
+
+	if err := pem.Encode(keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)}); err != nil {
+		return fmt.Errorf("failed creating key: %w", err)
+	}
+
+	return nil
+}