authz: remove and hide unused and local-only methods respectively

Signed-off-by: David Sheets <dsheets@docker.com>

pkg/authorization/middleware.go

@@ -25,20 +25,12 @@ func NewMiddleware(names []string, pg plugingetter.PluginGetter) *Middleware {
 	}
 }
 
-// GetAuthzPlugins gets authorization plugins
-func (m *Middleware) GetAuthzPlugins() []Plugin {
+func (m *Middleware) getAuthzPlugins() []Plugin {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	return m.plugins
 }
 
-// SetAuthzPlugins sets authorization plugins
-func (m *Middleware) SetAuthzPlugins(plugins []Plugin) {
-	m.mu.Lock()
-	m.plugins = plugins
-	m.mu.Unlock()
-}
-
 // SetPlugins sets the plugin used for authorization
 func (m *Middleware) SetPlugins(names []string) {
 	m.mu.Lock()
@@ -62,7 +54,7 @@ func (m *Middleware) RemovePlugin(name string) {
 // WrapHandler returns a new handler function wrapping the previous one in the request chain.
 func (m *Middleware) WrapHandler(handler func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error) func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
 	return func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
-		plugins := m.GetAuthzPlugins()
+		plugins := m.getAuthzPlugins()
 		if len(plugins) == 0 {
 			return handler(ctx, w, r, vars)
 		}
@@ -96,7 +88,7 @@ func (m *Middleware) WrapHandler(handler func(ctx context.Context, w http.Respon
 
 		// There's a chance that the authCtx.plugins was updated. One of the reasons
 		// this can happen is when an authzplugin is disabled.
-		plugins = m.GetAuthzPlugins()
+		plugins = m.getAuthzPlugins()
 		if len(plugins) == 0 {
 			logrus.Debug("There are no authz plugins in the chain")
 			return nil