fix ingress-nginx panic when the certificate format is wrong. (#7443)

* fix ingress-nginx panic when the certificate format is wrong.

Signed-off-by: wang_wenhu <976400757@qq.com>

* Add unit test.

Signed-off-by: wang_wenhu <976400757@qq.com>

* Update controller_test.go

internal/ingress/controller/controller.go

@@ -1493,7 +1493,7 @@ func extractTLSSecretName(host string, ing *ingress.Ingress,
 			continue
 		}
 
-		if cert == nil { // for tests
+		if cert == nil || cert.Certificate == nil {
 			continue
 		}
 

internal/ingress/controller/controller_test.go

@@ -21,6 +21,7 @@ import (
 	"crypto/x509"
 	"crypto/x509/pkix"
 	"encoding/asn1"
+	"encoding/base64"
 	"fmt"
 	"io"
 	"os"
@@ -1301,6 +1302,55 @@ func TestExtractTLSSecretName(t *testing.T) {
 			},
 			"demo",
 		},
+		"ingress tls, hosts, bad format cert, host not in tls Hosts": {
+			"foo1.bar",
+			&ingress.Ingress{
+				Ingress: networking.Ingress{
+					ObjectMeta: metav1.ObjectMeta{
+						Name: "test",
+					},
+					Spec: networking.IngressSpec{
+						TLS: []networking.IngressTLS{
+							{
+								Hosts:      []string{"foo.bar"},
+								SecretName: "demo",
+							},
+						},
+						Rules: []networking.IngressRule{
+							{
+								Host: "foo.bar",
+							},
+							{
+								Host: "foo1.bar",
+							},
+						},
+					},
+				},
+			},
+			func(string) (*ingress.SSLCert, error) {
+				secretData := map[string]string{
+					"ca.crt":    "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",
+					"namespace": "ZGVtbw==",
+					"token":     "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",
+				}
+				ca, err := base64.StdEncoding.DecodeString(secretData["ca.crt"])
+				if err != nil {
+					t.Fatalf("unexpected error decoding ca.crt: %v", err)
+				}
+				cert, err := ssl.CreateCACert(ca)
+				if err != nil {
+					t.Fatalf("unexpected error creating SSL Cert: %v", err)
+				}
+				err = ssl.ConfigureCACert("demo", ca, cert)
+				if err != nil {
+					t.Fatalf("error configuring CA certificate: %v", err)
+				}
+				cert.Name = "default-token-dn6xb"
+				cert.Namespace = "demo"
+				return cert, nil
+			},
+			"",
+		},
 	}
 
 	for title, tc := range testCases {