Ensure that unset Context.Name only allowed on base route

If Context.Name is not set, the acceess controller may allow an unintended
request through. By only allowing a request to proceed without a name on the
base route, we provide some protection if future bugs forget to set the context
properly.

app.go

@@ -172,6 +172,8 @@ func (app *App) authorized(w http.ResponseWriter, r *http.Request, context *Cont
 	}
 
 	var accessRecords []auth.Access
+
+	if context.Name != "" {
 		resource := auth.Resource{
 			Type: "repository",
 			Name: context.Name,
@@ -203,6 +205,24 @@ func (app *App) authorized(w http.ResponseWriter, r *http.Request, context *Cont
 					Action:   "*",
 				})
 		}
+	} else {
+		// Only allow the name not to be set on the base route.
+		route := mux.CurrentRoute(r)
+
+		if route == nil || route.GetName() != v2.RouteNameBase {
+			// For this to be properly secured, context.Name must always be set
+			// for a resource that may make a modification. The only condition
+			// under which name is not set and we still allow access is when the
+			// base route is accessed. This section prevents us from making that
+			// mistake elsewhere in the code, allowing any operation to proceed.
+			w.Header().Set("Content-Type", "application/json")
+			w.WriteHeader(http.StatusForbidden)
+
+			var errs v2.Errors
+			errs.Push(v2.ErrorCodeUnauthorized)
+			serveJSON(w, errs)
+		}
+	}
 
 	if err := app.accessController.Authorized(r, accessRecords...); err != nil {
 		switch err := err.(type) {

app_test.go

@@ -177,6 +177,11 @@ func TestNewApp(t *testing.T) {
 		t.Fatalf("unexpected content-type: %v != %v", req.Header.Get("Content-Type"), "application/json")
 	}
 
+	expectedAuthHeader := "Bearer realm=\"realm-test\",service=\"service-test\""
+	if req.Header.Get("Authorization") != expectedAuthHeader {
+		t.Fatalf("unexpected authorization header: %q != %q", req.Header.Get("Authorization"), expectedAuthHeader)
+	}
+
 	var errs v2.Errors
 	dec := json.NewDecoder(req.Body)
 	if err := dec.Decode(&errs); err != nil {

auth/silly/access.go

@@ -51,7 +51,7 @@ func (ac *accessController) Authorized(req *http.Request, accessRecords ...auth.
 		if len(accessRecords) > 0 {
 			var scopes []string
 			for _, access := range accessRecords {
-				scopes = append(scopes, fmt.Sprintf("%s:%s:%s", access.Type, access.Resource, access.Action))
+				scopes = append(scopes, fmt.Sprintf("%s:%s:%s", access.Type, access.Resource.Name, access.Action))
 			}
 			challenge.scope = strings.Join(scopes, " ")
 		}