refactor: e2e infras (#407)

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

test/e2e/conformance/utils/kubernetes/cert.go

@@ -0,0 +1,123 @@
+/*
+Copyright 2022 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 kubernetes
+
+import (
+	"bytes"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"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"
+
+	"github.com/alibaba/higress/test/e2e/conformance/utils/cert"
+)
+
+// 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")
+
+	return ConstructTLSSecret(namespace, secretName, serverCert.Bytes(), serverKey.Bytes())
+}
+
+// ConstructTLSSecret constructs a secret of type "kubernetes.io/tls"
+func ConstructTLSSecret(namespace, secretName string, cert, key []byte) *corev1.Secret {
+	return &corev1.Secret{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: namespace,
+			Name:      secretName,
+		},
+		Type: corev1.SecretTypeTLS,
+		Data: map[string][]byte{
+			corev1.TLSCertKey:       cert,
+			corev1.TLSPrivateKeyKey: key,
+		},
+	}
+}
+
+// ConstructCASecret construct a CA secret of type "Opaque"
+func ConstructCASecret(namespace, secretName string, cert []byte) *corev1.Secret {
+	return &corev1.Secret{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: namespace,
+			Name:      secretName,
+		},
+		Type: corev1.SecretTypeOpaque,
+		Data: map[string][]byte{
+			corev1.ServiceAccountRootCAKey: cert,
+		},
+	}
+}
+
+// generateRSACert generates a basic self signed certificate valid for a year
+func generateRSACert(host string, keyOut, certOut io.Writer) error {
+	notBefore := time.Now()
+	notAfter := notBefore.Add(cert.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{"Higress E2E Test"},
+		},
+		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)
+		}
+	}
+
+	priv, err := rsa.GenerateKey(rand.Reader, cert.RSABits)
+	if err != nil {
+		return fmt.Errorf("failed to generate key: %w", err)
+	}
+	certOut, keyOut, err = cert.GenerateCert(template, priv, template, nil)
+	if err != nil {
+		return fmt.Errorf("failed to generate rsa certificate: %w", err)
+	}
+
+	return nil
+}