Add support for refresh tokens for openshift connector.

Signed-off-by: Daniel Haus <dhaus@redhat.com>

connector/openshift/openshift.go

@@ -21,6 +21,11 @@ import (
 	"github.com/dexidp/dex/storage/kubernetes/k8sapi"
 )
 
+const (
+	wellKnownURLPath = "/.well-known/oauth-authorization-server"
+	usersURLPath     = "/apis/user.openshift.io/v1/users/~"
+)
+
 // Config holds configuration options for OpenShift login
 type Config struct {
 	Issuer       string   `json:"issuer"`
@@ -33,6 +38,7 @@ type Config struct {
 }
 
 var _ connector.CallbackConnector = (*openshiftConnector)(nil)
+var _ connector.RefreshConnector = (*openshiftConnector)(nil)
 
 type openshiftConnector struct {
 	apiURL       string
@@ -61,7 +67,7 @@ type user struct {
 func (c *Config) Open(id string, logger log.Logger) (conn connector.Connector, err error) {
 	ctx, cancel := context.WithCancel(context.Background())
 
-	wellKnownURL := strings.TrimSuffix(c.Issuer, "/") + "/.well-known/oauth-authorization-server"
+	wellKnownURL := strings.TrimSuffix(c.Issuer, "/") + wellKnownURLPath
 	req, err := http.NewRequest(http.MethodGet, wellKnownURL, nil)
 
 	openshiftConnector := openshiftConnector{
@@ -154,8 +160,23 @@ func (c *openshiftConnector) HandleCallback(s connector.Scopes, r *http.Request)
 		return identity, fmt.Errorf("oidc: failed to get token: %v", err)
 	}
 
-	client := c.oauth2Config.Client(ctx, token)
+	return c.identity(ctx, s, token)
+}
 
+func (c *openshiftConnector) Refresh(ctx context.Context, s connector.Scopes, oldID connector.Identity) (connector.Identity, error) {
+	var token oauth2.Token
+	err := json.Unmarshal(oldID.ConnectorData, &token)
+	if err != nil {
+		return connector.Identity{}, fmt.Errorf("parsing token: %w", err)
+	}
+	if c.httpClient != nil {
+		ctx = context.WithValue(ctx, oauth2.HTTPClient, c.httpClient)
+	}
+	return c.identity(ctx, s, &token)
+}
+
+func (c *openshiftConnector) identity(ctx context.Context, s connector.Scopes, token *oauth2.Token) (identity connector.Identity, err error) {
+	client := c.oauth2Config.Client(ctx, token)
 	user, err := c.user(ctx, client)
 	if err != nil {
 		return identity, fmt.Errorf("openshift: get user: %v", err)
@@ -177,12 +198,20 @@ func (c *openshiftConnector) HandleCallback(s connector.Scopes, r *http.Request)
 		Groups:            user.Groups,
 	}
 
+	if s.OfflineAccess {
+		connData, err := json.Marshal(token)
+		if err != nil {
+			return identity, fmt.Errorf("marshal connector data: %v", err)
+		}
+		identity.ConnectorData = connData
+	}
+
 	return identity, nil
 }
 
 // user function returns the OpenShift user associated with the authenticated user
 func (c *openshiftConnector) user(ctx context.Context, client *http.Client) (u user, err error) {
-	url := c.apiURL + "/apis/user.openshift.io/v1/users/~"
+	url := c.apiURL + usersURLPath
 
 	req, err := http.NewRequest("GET", url, nil)
 	if err != nil {

connector/openshift/openshift_test.go

@@ -9,6 +9,7 @@ import (
 	"net/url"
 	"reflect"
 	"testing"
+	"time"
 
 	"github.com/sirupsen/logrus"
 	"golang.org/x/oauth2"
@@ -184,6 +185,78 @@ func TestCallbackIdentity(t *testing.T) {
 	expectEquals(t, identity.Groups[0], "users")
 }
 
+func TestRefreshIdentity(t *testing.T) {
+	s := newTestServer(map[string]interface{}{
+		usersURLPath: user{
+			ObjectMeta: k8sapi.ObjectMeta{
+				Name: "jdoe",
+				UID:  "12345",
+			},
+			FullName: "John Doe",
+			Groups:   []string{"users"},
+		},
+	})
+	defer s.Close()
+
+	h, err := newHTTPClient(true, "")
+	expectNil(t, err)
+
+	oc := openshiftConnector{apiURL: s.URL, httpClient: h, oauth2Config: &oauth2.Config{
+		Endpoint: oauth2.Endpoint{
+			AuthURL: fmt.Sprintf("%s/oauth/authorize", s.URL),
+			TokenURL: fmt.Sprintf("%s/oauth/token", s.URL),
+		},
+	}}
+
+	data, err := json.Marshal(oauth2.Token{AccessToken: "fFAGRNJru1FTz70BzhT3Zg"})
+	expectNil(t, err)
+
+	oldID := connector.Identity{ConnectorData: data}
+
+	identity, err := oc.Refresh(context.Background(), connector.Scopes{Groups: true}, oldID)
+
+	expectNil(t, err)
+	expectEquals(t, identity.UserID, "12345")
+	expectEquals(t, identity.Username, "jdoe")
+	expectEquals(t, identity.PreferredUsername, "jdoe")
+	expectEquals(t, identity.Email, "jdoe")
+	expectEquals(t, len(identity.Groups), 1)
+	expectEquals(t, identity.Groups[0], "users")
+}
+
+func TestRefreshIdentityFailure(t *testing.T) {
+	s := newTestServer(map[string]interface{}{
+		usersURLPath: user{
+			ObjectMeta: k8sapi.ObjectMeta{
+				Name: "jdoe",
+				UID:  "12345",
+			},
+			FullName: "John Doe",
+			Groups:   []string{"users"},
+		},
+	})
+	defer s.Close()
+
+	h, err := newHTTPClient(true, "")
+	expectNil(t, err)
+
+	oc := openshiftConnector{apiURL: s.URL, httpClient: h, oauth2Config: &oauth2.Config{
+		Endpoint: oauth2.Endpoint{
+			AuthURL: fmt.Sprintf("%s/oauth/authorize", s.URL),
+			TokenURL: fmt.Sprintf("%s/oauth/token", s.URL),
+		},
+	}}
+
+	data, err := json.Marshal(oauth2.Token{AccessToken: "oRzxVjCnohYRHEYEhZshkmakKmoyVoTjfUGC", Expiry: time.Now().Add(-time.Hour)})
+	expectNil(t, err)
+
+	oldID := connector.Identity{ConnectorData: data}
+
+	identity, err := oc.Refresh(context.Background(), connector.Scopes{Groups: true}, oldID)
+	expectNotNil(t, err)
+	expectEquals(t, connector.Identity{}, identity)
+}
+
 func newTestServer(responses map[string]interface{}) *httptest.Server {
 	var s *httptest.Server
 	s = httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -216,3 +289,9 @@ func expectEquals(t *testing.T, a interface{}, b interface{}) {
 		t.Errorf("Expected %+v to equal %+v", a, b)
 	}
 }
+
+func expectNotNil(t *testing.T, a interface{}) {
+	if a == nil {
+		t.Errorf("Expected %+v to not equal nil", a)
+	}
+}