Use GitLab's refresh_token during Refresh. (#2352)

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

connector/gitlab/gitlab.go

@@ -9,6 +9,7 @@ import (
 	"io"
 	"net/http"
 	"strconv"
+	"time"
 
 	"golang.org/x/oauth2"
 
@@ -61,8 +62,9 @@ func (c *Config) Open(id string, logger log.Logger) (connector.Connector, error)
 }
 
 type connectorData struct {
-	// GitLab's OAuth2 tokens never expire. We don't need a refresh token.
-	AccessToken string `json:"accessToken"`
+	// Support GitLab's Access Tokens and Refresh tokens.
+	AccessToken  string `json:"accessToken"`
+	RefreshToken string `json:"refreshToken"`
 }
 
 var (
@@ -135,6 +137,11 @@ func (c *gitlabConnector) HandleCallback(s connector.Scopes, r *http.Request) (i
 		return identity, fmt.Errorf("gitlab: failed to get token: %v", err)
 	}
 
+	return c.identity(ctx, s, token)
+}
+
+func (c *gitlabConnector) identity(ctx context.Context, s connector.Scopes, token *oauth2.Token) (identity connector.Identity, err error) {
+	oauth2Config := c.oauth2Config(s)
 	client := oauth2Config.Client(ctx, token)
 
 	user, err := c.user(ctx, client)
@@ -146,6 +153,7 @@ func (c *gitlabConnector) HandleCallback(s connector.Scopes, r *http.Request) (i
 	if username == "" {
 		username = user.Email
 	}
+
 	identity = connector.Identity{
 		UserID:            strconv.Itoa(user.ID),
 		Username:          username,
@@ -166,10 +174,10 @@ func (c *gitlabConnector) HandleCallback(s connector.Scopes, r *http.Request) (i
 	}
 
 	if s.OfflineAccess {
-		data := connectorData{AccessToken: token.AccessToken}
+		data := connectorData{RefreshToken: token.RefreshToken, AccessToken: token.AccessToken}
 		connData, err := json.Marshal(data)
 		if err != nil {
-			return identity, fmt.Errorf("marshal connector data: %v", err)
+			return identity, fmt.Errorf("gitlab: marshal connector data: %v", err)
 		}
 		identity.ConnectorData = connData
 	}
@@ -178,37 +186,39 @@ func (c *gitlabConnector) HandleCallback(s connector.Scopes, r *http.Request) (i
 }
 
 func (c *gitlabConnector) Refresh(ctx context.Context, s connector.Scopes, ident connector.Identity) (connector.Identity, error) {
-	if len(ident.ConnectorData) == 0 {
-		return ident, errors.New("no upstream access token found")
-	}
-
 	var data connectorData
 	if err := json.Unmarshal(ident.ConnectorData, &data); err != nil {
-		return ident, fmt.Errorf("gitlab: unmarshal access token: %v", err)
-	}
-
-	client := c.oauth2Config(s).Client(ctx, &oauth2.Token{AccessToken: data.AccessToken})
-	user, err := c.user(ctx, client)
-	if err != nil {
-		return ident, fmt.Errorf("gitlab: get user: %v", err)
+		return ident, fmt.Errorf("gitlab: unmarshal connector data: %v", err)
 	}
+	oauth2Config := c.oauth2Config(s)
 
-	username := user.Name
-	if username == "" {
-		username = user.Email
+	if c.httpClient != nil {
+		ctx = context.WithValue(ctx, oauth2.HTTPClient, c.httpClient)
 	}
-	ident.Username = username
-	ident.PreferredUsername = user.Username
-	ident.Email = user.Email
 
-	if c.groupsRequired(s.Groups) {
-		groups, err := c.getGroups(ctx, client, s.Groups, user.Username)
-		if err != nil {
-			return ident, fmt.Errorf("gitlab: get groups: %v", err)
+	switch {
+	case data.RefreshToken != "":
+		{
+			t := &oauth2.Token{
+				RefreshToken: data.RefreshToken,
+				Expiry:       time.Now().Add(-time.Hour),
+			}
+			token, err := oauth2Config.TokenSource(ctx, t).Token()
+			if err != nil {
+				return ident, fmt.Errorf("gitlab: failed to get refresh token: %v", err)
+			}
+			return c.identity(ctx, s, token)
+		}
+	case data.AccessToken != "":
+		{
+			token := &oauth2.Token{
+				AccessToken: data.AccessToken,
+			}
+			return c.identity(ctx, s, token)
 		}
-		ident.Groups = groups
+	default:
+		return ident, errors.New("no refresh or access token found")
 	}
-	return ident, nil
 }
 
 func (c *gitlabConnector) groupsRequired(groupScope bool) bool {

connector/gitlab/gitlab_test.go

@@ -180,6 +180,75 @@ func TestLoginWithTeamNonWhitelisted(t *testing.T) {
 	expectEquals(t, err.Error(), "gitlab: get groups: gitlab: user \"joebloggs\" is not in any of the required groups")
 }
 
+func TestRefresh(t *testing.T) {
+	s := newTestServer(map[string]interface{}{
+		"/api/v4/user": gitlabUser{Email: "some@email.com", ID: 12345678},
+		"/oauth/token": map[string]interface{}{
+			"access_token":  "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9",
+			"refresh_token": "oRzxVjCnohYRHEYEhZshkmakKmoyVoTjfUGC",
+			"expires_in":    "30",
+		},
+		"/oauth/userinfo": userInfo{
+			Groups: []string{"team-1"},
+		},
+	})
+	defer s.Close()
+
+	hostURL, err := url.Parse(s.URL)
+	expectNil(t, err)
+
+	req, err := http.NewRequest("GET", hostURL.String(), nil)
+	expectNil(t, err)
+
+	c := gitlabConnector{baseURL: s.URL, httpClient: newClient()}
+
+	expectedConnectorData, err := json.Marshal(connectorData{
+		RefreshToken: "oRzxVjCnohYRHEYEhZshkmakKmoyVoTjfUGC",
+		AccessToken:  "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9",
+	})
+	expectNil(t, err)
+
+	identity, err := c.HandleCallback(connector.Scopes{OfflineAccess: true}, req)
+	expectNil(t, err)
+	expectEquals(t, identity.Username, "some@email.com")
+	expectEquals(t, identity.UserID, "12345678")
+	expectEquals(t, identity.ConnectorData, expectedConnectorData)
+
+	identity, err = c.Refresh(context.Background(), connector.Scopes{OfflineAccess: true}, identity)
+	expectNil(t, err)
+	expectEquals(t, identity.Username, "some@email.com")
+	expectEquals(t, identity.UserID, "12345678")
+	expectEquals(t, identity.ConnectorData, expectedConnectorData)
+}
+
+func TestRefreshWithEmptyConnectorData(t *testing.T) {
+	s := newTestServer(map[string]interface{}{
+		"/api/v4/user": gitlabUser{Email: "some@email.com", ID: 12345678},
+		"/oauth/token": map[string]interface{}{
+			"access_token":  "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9",
+			"refresh_token": "oRzxVjCnohYRHEYEhZshkmakKmoyVoTjfUGC",
+			"expires_in":    "30",
+		},
+		"/oauth/userinfo": userInfo{
+			Groups: []string{"team-1"},
+		},
+	})
+	defer s.Close()
+
+	emptyConnectorData, err := json.Marshal(connectorData{
+		RefreshToken: "",
+		AccessToken:  "",
+	})
+	expectNil(t, err)
+
+	c := gitlabConnector{baseURL: s.URL, httpClient: newClient()}
+	emptyIdentity := connector.Identity{ConnectorData: emptyConnectorData}
+
+	identity, err := c.Refresh(context.Background(), connector.Scopes{OfflineAccess: true}, emptyIdentity)
+	expectNotNil(t, err, "Refresh error")
+	expectEquals(t, emptyIdentity, identity)
+}
+
 func newTestServer(responses map[string]interface{}) *httptest.Server {
 	return httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		response := responses[r.RequestURI]