providers/proxy: fix nil error in claims

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/outpost/proxyv2/application/claims.go

@@ -6,14 +6,14 @@ type ProxyClaims struct {
 }
 
 type Claims struct {
-	Sub               string      `json:"sub"`
-	Exp               int         `json:"exp"`
-	Email             string      `json:"email"`
-	Verified          bool        `json:"email_verified"`
-	Proxy             ProxyClaims `json:"ak_proxy"`
-	Name              string      `json:"name"`
-	PreferredUsername string      `json:"preferred_username"`
-	Groups            []string    `json:"groups"`
+	Sub               string       `json:"sub"`
+	Exp               int          `json:"exp"`
+	Email             string       `json:"email"`
+	Verified          bool         `json:"email_verified"`
+	Proxy             *ProxyClaims `json:"ak_proxy"`
+	Name              string       `json:"name"`
+	PreferredUsername string       `json:"preferred_username"`
+	Groups            []string     `json:"groups"`
 
 	RawToken string
 }

internal/outpost/proxyv2/application/mode_forward_nginx_test.go

@@ -70,7 +70,7 @@ func TestForwardHandleNginx_Single_Claims(t *testing.T) {
 	s, _ := a.sessions.Get(req, constants.SeesionName)
 	s.Values[constants.SessionClaims] = Claims{
 		Sub: "foo",
-		Proxy: ProxyClaims{
+		Proxy: &ProxyClaims{
 			UserAttributes: map[string]interface{}{
 				"username": "foo",
 				"password": "bar",

internal/outpost/proxyv2/application/mode_forward_traefik_test.go

@@ -64,7 +64,7 @@ func TestForwardHandleTraefik_Single_Claims(t *testing.T) {
 	s, _ := a.sessions.Get(req, constants.SeesionName)
 	s.Values[constants.SessionClaims] = Claims{
 		Sub: "foo",
-		Proxy: ProxyClaims{
+		Proxy: &ProxyClaims{
 			UserAttributes: map[string]interface{}{
 				"username": "foo",
 				"password": "bar",

internal/outpost/proxyv2/application/mode_proxy.go

@@ -74,7 +74,7 @@ func (a *Application) configureProxy() error {
 func (a *Application) proxyModifyRequest(ou *url.URL) func(req *http.Request) {
 	return func(r *http.Request) {
 		claims, _ := a.getClaims(r)
-		if claims.Proxy.BackendOverride != "" {
+		if claims.Proxy != nil && claims.Proxy.BackendOverride != "" {
 			u, err := url.Parse(claims.Proxy.BackendOverride)
 			if err != nil {
 				a.log.WithField("backend_override", claims.Proxy.BackendOverride).WithError(err).Warning("failed parse user backend override")