Setup test for verifying by checking certificate fingerprints

pkg/cloudprovider/providers/vsphere/vclib/connection_test.go

@@ -18,8 +18,10 @@ package vclib_test
 
 import (
 	"context"
+	"crypto/sha1"
 	"crypto/tls"
 	"crypto/x509"
+	"fmt"
 	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
@@ -30,7 +32,7 @@ import (
 	"k8s.io/kubernetes/pkg/cloudprovider/providers/vsphere/vclib/fixtures"
 )
 
-func createTestServer(t *testing.T, caCertPath, serverCertPath, serverKeyPath string, handler http.HandlerFunc) *httptest.Server {
+func createTestServer(t *testing.T, caCertPath, serverCertPath, serverKeyPath string, handler http.HandlerFunc) (*httptest.Server, string) {
 	caCertPEM, err := ioutil.ReadFile(caCertPath)
 	if err != nil {
 		t.Fatalf("Could not read ca cert from file")
@@ -54,22 +56,20 @@ func createTestServer(t *testing.T, caCertPath, serverCertPath, serverKeyPath st
 		RootCAs: certPool,
 	}
 
-	return server
+	// calculate the leaf certificate's fingerprint
+	x509LeafCert := server.TLS.Certificates[0].Certificate[0]
+	tpBytes := sha1.Sum(x509LeafCert)
+	tpString := fmt.Sprintf("%x", tpBytes)
+
+	return server, tpString
 }
 
 func TestWithValidCaCert(t *testing.T) {
-	gotRequest := false
+	handler, verify := getRequestVerifier(t)
-	handler := func(w http.ResponseWriter, r *http.Request) {
-		gotRequest = true
-	}
 
-	server := createTestServer(t, fixtures.CaCertPath, fixtures.ServerCertPath, fixtures.ServerKeyPath, handler)
+	server, _ := createTestServer(t, fixtures.CaCertPath, fixtures.ServerCertPath, fixtures.ServerKeyPath, handler)
 	server.StartTLS()
-
+	u := mustParseUrl(t, server.URL)
-	u, err := url.Parse(server.URL)
-	if err != nil {
-		t.Fatalf("Cannot parse URL: %v", err)
-	}
 
 	connection := &vclib.VSphereConnection{
 		Hostname: u.Hostname(),
@@ -80,9 +80,26 @@ func TestWithValidCaCert(t *testing.T) {
 	// Ignoring error here, because we only care about the TLS connection
 	connection.NewClient(context.Background())
 
-	if !gotRequest {
+	verify()
-		t.Fatalf("Never saw a request, TLS connection could not be established")
+}
+
+func TestWithValidThumbprint(t *testing.T) {
+	handler, verify := getRequestVerifier(t)
+
+	server, serverThumbprint := createTestServer(t, fixtures.CaCertPath, fixtures.ServerCertPath, fixtures.ServerKeyPath, handler)
+	server.StartTLS()
+	u := mustParseUrl(t, server.URL)
+
+	connection := &vclib.VSphereConnection{
+		Hostname:   u.Hostname(),
+		Port:       u.Port(),
+		Thumbprint: serverThumbprint,
 	}
+
+	// Ignoring error here, because we only care about the TLS connection
+	connection.NewClient(context.Background())
+
+	verify()
 }
 
 func TestWithInvalidCaCertPath(t *testing.T) {
@@ -133,3 +150,27 @@ type fakeTransport struct{}
 func (ft fakeTransport) RoundTrip(*http.Request) (*http.Response, error) {
 	return nil, nil
 }
+
+func getRequestVerifier(t *testing.T) (http.HandlerFunc, func()) {
+	gotRequest := false
+
+	handler := func(w http.ResponseWriter, r *http.Request) {
+		gotRequest = true
+	}
+
+	checker := func() {
+		if !gotRequest {
+			t.Fatalf("Never saw a request, maybe TLS connection could not be established?")
+		}
+	}
+
+	return handler, checker
+}
+
+func mustParseUrl(t *testing.T, i string) *url.URL {
+	u, err := url.Parse(i)
+	if err != nil {
+		t.Fatalf("Cannot parse URL: %v", err)
+	}
+	return u
+}