Disable Oauth check if oauth disabled (#32368)

Fix #32367

---------

Co-authored-by: Giteabot <teabot@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/web.go

@@ -324,6 +324,13 @@ func registerRoutes(m *web.Router) {
 		}
 	}
 
+	oauth2Enabled := func(ctx *context.Context) {
+		if !setting.OAuth2.Enabled {
+			ctx.Error(http.StatusForbidden)
+			return
+		}
+	}
+
 	reqMilestonesDashboardPageEnabled := func(ctx *context.Context) {
 		if !setting.Service.ShowMilestonesDashboardPage {
 			ctx.Error(http.StatusForbidden)
@@ -546,16 +553,18 @@ func registerRoutes(m *web.Router) {
 	m.Any("/user/events", routing.MarkLongPolling, events.Events)
 
 	m.Group("/login/oauth", func() {
+		m.Group("", func() {
 			m.Get("/authorize", web.Bind(forms.AuthorizationForm{}), auth.AuthorizeOAuth)
 			m.Post("/grant", web.Bind(forms.GrantApplicationForm{}), auth.GrantApplicationOAuth)
 			// TODO manage redirection
 			m.Post("/authorize", web.Bind(forms.AuthorizationForm{}), auth.AuthorizeOAuth)
 		}, ignSignInAndCsrf, reqSignIn)
 
-	m.Methods("GET, OPTIONS", "/login/oauth/userinfo", optionsCorsHandler(), ignSignInAndCsrf, auth.InfoOAuth)
-	m.Methods("POST, OPTIONS", "/login/oauth/access_token", optionsCorsHandler(), web.Bind(forms.AccessTokenForm{}), ignSignInAndCsrf, auth.AccessTokenOAuth)
-	m.Methods("GET, OPTIONS", "/login/oauth/keys", optionsCorsHandler(), ignSignInAndCsrf, auth.OIDCKeys)
-	m.Methods("POST, OPTIONS", "/login/oauth/introspect", optionsCorsHandler(), web.Bind(forms.IntrospectTokenForm{}), ignSignInAndCsrf, auth.IntrospectOAuth)
+		m.Methods("GET, OPTIONS", "/userinfo", optionsCorsHandler(), ignSignInAndCsrf, auth.InfoOAuth)
+		m.Methods("POST, OPTIONS", "/access_token", optionsCorsHandler(), web.Bind(forms.AccessTokenForm{}), ignSignInAndCsrf, auth.AccessTokenOAuth)
+		m.Methods("GET, OPTIONS", "/keys", optionsCorsHandler(), ignSignInAndCsrf, auth.OIDCKeys)
+		m.Methods("POST, OPTIONS", "/introspect", optionsCorsHandler(), web.Bind(forms.IntrospectTokenForm{}), ignSignInAndCsrf, auth.IntrospectOAuth)
+	}, oauth2Enabled)
 
 	m.Group("/user/settings", func() {
 		m.Get("", user_setting.Profile)
@@ -596,17 +605,24 @@ func registerRoutes(m *web.Router) {
 			}, openIDSignInEnabled)
 			m.Post("/account_link", linkAccountEnabled, security.DeleteAccountLink)
 		})
-		m.Group("/applications/oauth2", func() {
+
+		m.Group("/applications", func() {
+			// oauth2 applications
+			m.Group("/oauth2", func() {
 				m.Get("/{id}", user_setting.OAuth2ApplicationShow)
 				m.Post("/{id}", web.Bind(forms.EditOAuth2ApplicationForm{}), user_setting.OAuthApplicationsEdit)
 				m.Post("/{id}/regenerate_secret", user_setting.OAuthApplicationsRegenerateSecret)
 				m.Post("", web.Bind(forms.EditOAuth2ApplicationForm{}), user_setting.OAuthApplicationsPost)
 				m.Post("/{id}/delete", user_setting.DeleteOAuth2Application)
 				m.Post("/{id}/revoke/{grantId}", user_setting.RevokeOAuth2Grant)
-		})
-		m.Combo("/applications").Get(user_setting.Applications).
+			}, oauth2Enabled)
+
+			// access token applications
+			m.Combo("").Get(user_setting.Applications).
 				Post(web.Bind(forms.NewAccessTokenForm{}), user_setting.ApplicationsPost)
-		m.Post("/applications/delete", user_setting.DeleteApplication)
+			m.Post("/delete", user_setting.DeleteApplication)
+		})
+
 		m.Combo("/keys").Get(user_setting.Keys).
 			Post(web.Bind(forms.AddKeyForm{}), user_setting.KeysPost)
 		m.Post("/keys/delete", user_setting.DeleteKey)
@@ -780,12 +796,7 @@ func registerRoutes(m *web.Router) {
 				m.Post("/regenerate_secret", admin.ApplicationsRegenerateSecret)
 				m.Post("/delete", admin.DeleteApplication)
 			})
-		}, func(ctx *context.Context) {
-			if !setting.OAuth2.Enabled {
-				ctx.Error(http.StatusForbidden)
-				return
-			}
-		})
+		}, oauth2Enabled)
 
 		m.Group("/actions", func() {
 			m.Get("", admin.RedirectToDefaultSetting)
@@ -909,12 +920,7 @@ func registerRoutes(m *web.Router) {
 						m.Post("/regenerate_secret", org.OAuthApplicationsRegenerateSecret)
 						m.Post("/delete", org.DeleteOAuth2Application)
 					})
-				}, func(ctx *context.Context) {
-					if !setting.OAuth2.Enabled {
-						ctx.Error(http.StatusForbidden)
-						return
-					}
-				})
+				}, oauth2Enabled)
 
 				m.Group("/hooks", func() {
 					m.Get("", org.Webhooks)

services/auth/oauth2.go

@@ -27,10 +27,15 @@ var (
 
 // CheckOAuthAccessToken returns uid of user from oauth token
 func CheckOAuthAccessToken(ctx context.Context, accessToken string) int64 {
-	// JWT tokens require a "."
+	if !setting.OAuth2.Enabled {
+		return 0
+	}
+
+	// JWT tokens require a ".", if the token isn't like that, return early
 	if !strings.Contains(accessToken, ".") {
 		return 0
 	}
+
 	token, err := oauth2_provider.ParseToken(accessToken, oauth2_provider.DefaultSigningKey)
 	if err != nil {
 		log.Trace("oauth2.ParseToken: %v", err)