Add anonymous authenticator

plugin/pkg/auth/authenticator/request/anonymous/anonymous.go

+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package anonymous
+
+import (
+	"net/http"
+
+	"k8s.io/kubernetes/pkg/auth/authenticator"
+	"k8s.io/kubernetes/pkg/auth/user"
+)
+
+const (
+	anonymousUser = "system:anonymous"
+
+	unauthenticatedGroup = "system:unauthenticated"
+)
+
+func NewAuthenticator() authenticator.Request {
+	return authenticator.RequestFunc(func(req *http.Request) (user.Info, bool, error) {
+		return &user.DefaultInfo{Name: anonymousUser, Groups: []string{unauthenticatedGroup}}, true, nil
+	})
+}

plugin/pkg/auth/authenticator/request/anonymous/anonymous_test.go

+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package anonymous
+
+import (
+	"testing"
+
+	"k8s.io/kubernetes/pkg/auth/authenticator"
+	"k8s.io/kubernetes/pkg/util/sets"
+)
+
+func TestAnonymous(t *testing.T) {
+	var a authenticator.Request = NewAuthenticator()
+	u, ok, err := a.AuthenticateRequest(nil)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if !ok {
+		t.Fatalf("Unexpectedly unauthenticated")
+	}
+	if u.GetName() != "system:anonymous" {
+		t.Fatalf("Expected username %s, got %s", "system:anonymous", u.GetName())
+	}
+	if !sets.NewString(u.GetGroups()...).Equal(sets.NewString("system:unauthenticated")) {
+		t.Fatalf("Expected group %s, got %v", "system:unauthenticated", u.GetGroups())
+	}
+}