Datasource HTTP settings: Add TLS skip verify

In c04d95f35 I changed the default for datasource HTTP requests so that
TLS is always verified.

This commit adds a checkbox to allow an admin to explicitly skip TLS
verification, for testing purposes.

pkg/models/datasource_cache.go

@@ -45,8 +45,16 @@ func (ds *DataSource) GetHttpTransport() (*http.Transport, error) {
 		return t.Transport, nil
 	}
 
+	var tlsSkipVerify, tlsClientAuth, tlsAuthWithCACert bool
+	if ds.JsonData != nil {
+		tlsClientAuth = ds.JsonData.Get("tlsClientAuth").MustBool(false)
+		tlsAuthWithCACert = ds.JsonData.Get("tlsAuthWithCACert").MustBool(false)
+		tlsSkipVerify = ds.JsonData.Get("tlsSkipVerify").MustBool(false)
+	}
+
 	transport := &http.Transport{
 		TLSClientConfig: &tls.Config{
+			InsecureSkipVerify: tlsSkipVerify,
 			Renegotiation:      tls.RenegotiateFreelyAsClient,
 		},
 		Proxy: http.ProxyFromEnvironment,
@@ -61,12 +69,6 @@ func (ds *DataSource) GetHttpTransport() (*http.Transport, error) {
 		IdleConnTimeout:       90 * time.Second,
 	}
 
-	var tlsClientAuth, tlsAuthWithCACert bool
-	if ds.JsonData != nil {
-		tlsClientAuth = ds.JsonData.Get("tlsClientAuth").MustBool(false)
-		tlsAuthWithCACert = ds.JsonData.Get("tlsAuthWithCACert").MustBool(false)
-	}
-
 	if tlsClientAuth || tlsAuthWithCACert {
 		decrypted := ds.SecureJsonData.Decrypt()
 

pkg/models/datasource_cache_test.go

@@ -29,61 +29,140 @@ func TestDataSourceCache(t *testing.T) {
 		Convey("Should be using the cached proxy", func() {
 			So(t2, ShouldEqual, t1)
 		})
+		Convey("Should verify TLS by default", func() {
+			So(t1.TLSClientConfig.InsecureSkipVerify, ShouldEqual, false)
+		})
+		Convey("Should have no TLS client certificate configured", func() {
+			So(len(t1.TLSClientConfig.Certificates), ShouldEqual, 0)
+		})
+		Convey("Should have no user-supplied TLS CA onfigured", func() {
+			So(t1.TLSClientConfig.RootCAs, ShouldBeNil)
+		})
 	})
 
-	Convey("When getting kubernetes datasource proxy", t, func() {
+	Convey("When caching a datasource proxy then updating it", t, func() {
 		clearCache()
 		setting.SecretKey = "password"
 
 		json := simplejson.New()
-		json.Set("tlsClientAuth", true)
 		json.Set("tlsAuthWithCACert", true)
 
-		t := time.Now()
+		tlsCaCert, err := util.Encrypt([]byte(caCert), "password")
+		So(err, ShouldBeNil)
 		ds := DataSource{
+			Id:             1,
 			Url:            "http://k8s:8001",
 			Type:           "Kubernetes",
-			Updated: t.Add(-2 * time.Minute),
+			SecureJsonData: map[string][]byte{"tlsCACert": tlsCaCert},
+			Updated:        time.Now().Add(-2 * time.Minute),
 		}
 
-		transport, err := ds.GetHttpTransport()
+		t1, err := ds.GetHttpTransport()
 		So(err, ShouldBeNil)
 
-		Convey("Should verify TLS certificates by default", func() {
-			So(transport.TLSClientConfig.InsecureSkipVerify, ShouldEqual, false)
+		Convey("Should verify TLS by default", func() {
+			So(t1.TLSClientConfig.InsecureSkipVerify, ShouldEqual, false)
+		})
+		Convey("Should have no TLS client certificate configured", func() {
+			So(len(t1.TLSClientConfig.Certificates), ShouldEqual, 0)
 		})
+		Convey("Should have no user-supplied TLS CA configured", func() {
+			So(t1.TLSClientConfig.RootCAs, ShouldBeNil)
+		})
+
+		ds.JsonData = nil
+		ds.SecureJsonData = map[string][]byte{}
+		ds.Updated = time.Now()
 
-		ds.JsonData = json
+		t2, err := ds.GetHttpTransport()
+		So(err, ShouldBeNil)
 
-		tlsCaCert, _ := util.Encrypt([]byte(caCert), "password")
-		tlsClientCert, _ := util.Encrypt([]byte(clientCert), "password")
-		tlsClientKey, _ := util.Encrypt([]byte(clientKey), "password")
+		Convey("Should have no user-supplied TLS CA configured after the update", func() {
+			So(t2.TLSClientConfig.RootCAs, ShouldBeNil)
+		})
+	})
 
-		ds.SecureJsonData = map[string][]byte{
-			"tlsCACert":     tlsCaCert,
+	Convey("When caching a datasource proxy with TLS client authentication enabled", t, func() {
+		clearCache()
+		setting.SecretKey = "password"
+
+		json := simplejson.New()
+		json.Set("tlsClientAuth", true)
+
+		tlsClientCert, err := util.Encrypt([]byte(clientCert), "password")
+		So(err, ShouldBeNil)
+		tlsClientKey, err := util.Encrypt([]byte(clientKey), "password")
+		So(err, ShouldBeNil)
+
+		ds := DataSource{
+			Id:       1,
+			Url:      "http://k8s:8001",
+			Type:     "Kubernetes",
+			JsonData: json,
+			SecureJsonData: map[string][]byte{
 				"tlsClientCert": tlsClientCert,
 				"tlsClientKey":  tlsClientKey,
+			},
+		}
+
+		tr, err := ds.GetHttpTransport()
+		So(err, ShouldBeNil)
+
+		Convey("Should verify TLS by default", func() {
+			So(tr.TLSClientConfig.InsecureSkipVerify, ShouldEqual, false)
+		})
+		Convey("Should have a TLS client certificate configured", func() {
+			So(len(tr.TLSClientConfig.Certificates), ShouldEqual, 1)
+		})
+	})
+
+	Convey("When caching a datasource proxy with a user-supplied TLS CA", t, func() {
+		clearCache()
+		setting.SecretKey = "password"
+
+		json := simplejson.New()
+		json.Set("tlsAuthWithCACert", true)
+
+		tlsCaCert, err := util.Encrypt([]byte(caCert), "password")
+		So(err, ShouldBeNil)
+
+		ds := DataSource{
+			Id:             1,
+			Url:            "http://k8s:8001",
+			Type:           "Kubernetes",
+			JsonData:       json,
+			SecureJsonData: map[string][]byte{"tlsCACert": tlsCaCert},
 		}
-		ds.Updated = t.Add(-1 * time.Minute)
 
-		transport, err = ds.GetHttpTransport()
+		tr, err := ds.GetHttpTransport()
 		So(err, ShouldBeNil)
 
-		Convey("Should add cert and verify TLS certificates", func() {
-			So(transport.TLSClientConfig.InsecureSkipVerify, ShouldEqual, false)
-			So(len(transport.TLSClientConfig.Certificates), ShouldEqual, 1)
+		Convey("Should verify TLS by default", func() {
+			So(tr.TLSClientConfig.InsecureSkipVerify, ShouldEqual, false)
+		})
+		Convey("Should have a TLS CA configured", func() {
+			So(len(tr.TLSClientConfig.RootCAs.Subjects()), ShouldEqual, 1)
+		})
 	})
 
-		ds.JsonData = nil
-		ds.SecureJsonData = map[string][]byte{}
-		ds.Updated = t
+	Convey("When caching a datasource proxy when user skips TLS verification", t, func() {
+		clearCache()
+
+		json := simplejson.New()
+		json.Set("tlsSkipVerify", true)
+
+		ds := DataSource{
+			Id:       1,
+			Url:      "http://k8s:8001",
+			Type:     "Kubernetes",
+			JsonData: json,
+		}
 
-		transport, err = ds.GetHttpTransport()
+		tr, err := ds.GetHttpTransport()
 		So(err, ShouldBeNil)
 
-		Convey("Should remove cert but still verify TLS certificates", func() {
-			So(transport.TLSClientConfig.InsecureSkipVerify, ShouldEqual, false)
-			So(len(transport.TLSClientConfig.Certificates), ShouldEqual, 0)
+		Convey("Should skip TLS verification", func() {
+			So(tr.TLSClientConfig.InsecureSkipVerify, ShouldEqual, true)
 		})
 	})
 }
@@ -115,7 +194,8 @@ FHoXIyGOdq1chmRVocdGBCF8fUoGIbuF14r53rpvcbEKtKnnP8+96luKAZLq0a4n
 3lb92xM=
 -----END CERTIFICATE-----`
 
-const clientCert string = `-----BEGIN CERTIFICATE-----
+const clientCert string = `
+-----BEGIN CERTIFICATE-----
 MIICsjCCAZoCCQCcd8sOfstQLzANBgkqhkiG9w0BAQsFADAXMRUwEwYDVQQDDAxj
 YS1rOHMtc3RobG0wHhcNMTYxMTAyMDkyNTE1WhcNMTcxMTAyMDkyNTE1WjAfMR0w
 GwYDVQQDDBRhZG0tZGFuaWVsLWs4cy1zdGhsbTCCASIwDQYJKoZIhvcNAQEBBQAD

public/app/features/plugins/partials/ds_http_settings.html

@@ -39,6 +39,7 @@
   </div>
 
   <h3 class="page-heading">Http Auth</h3>
+    <div class="gf-form-group">
       <div class="gf-form-inline">
         <gf-form-switch class="gf-form" label="Basic Auth" checked="current.basicAuth" label-class="width-8" switch-class="max-width-6"></gf-form-switch>
         <gf-form-switch class="gf-form" label="With Credentials" tooltip="Whether credentials such as cookies or auth headers should be sent with cross-site requests." checked="current.withCredentials" label-class="width-11" switch-class="max-width-6"></gf-form-switch>
@@ -47,6 +48,12 @@
         <gf-form-switch class="gf-form" ng-if="current.access=='proxy'" label="TLS Client Auth" label-class="width-8" checked="current.jsonData.tlsClientAuth" switch-class="max-width-6"></gf-form-switch>
         <gf-form-switch class="gf-form" ng-if="current.access=='proxy'" label="With CA Cert" tooltip="Optional. Needed for self-signed TLS Certs." checked="current.jsonData.tlsAuthWithCACert" label-class="width-11" switch-class="max-width-6"></gf-form-switch>
       </div>
+    </div>
+
+    <div class="gf-form-inline">
+      <gf-form-switch class="gf-form" ng-if="current.access=='proxy'" label="Skip TLS Verification (Insecure)" label-class="width-16" checked="current.jsonData.tlsSkipVerify" switch-class="max-width-6"></gf-form-switch>
+    </div>
+  </div>
 </div>
 
 <div class="gf-form-group" ng-if="current.basicAuth">