Replace godep with dep

vendor/k8s.io/apiserver/pkg/authentication/token/union/union.go

@@ -0,0 +1,70 @@
+/*
+Copyright 2017 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 union
+
+import (
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
+	"k8s.io/apiserver/pkg/authentication/authenticator"
+	"k8s.io/apiserver/pkg/authentication/user"
+)
+
+// unionAuthTokenHandler authenticates tokens using a chain of authenticator.Token objects
+type unionAuthTokenHandler struct {
+	// Handlers is a chain of request authenticators to delegate to
+	Handlers []authenticator.Token
+	// FailOnError determines whether an error returns short-circuits the chain
+	FailOnError bool
+}
+
+// New returns a token authenticator that validates credentials using a chain of authenticator.Token objects.
+// The entire chain is tried until one succeeds. If all fail, an aggregate error is returned.
+func New(authTokenHandlers ...authenticator.Token) authenticator.Token {
+	if len(authTokenHandlers) == 1 {
+		return authTokenHandlers[0]
+	}
+	return &unionAuthTokenHandler{Handlers: authTokenHandlers, FailOnError: false}
+}
+
+// NewFailOnError returns a token authenticator that validates credentials using a chain of authenticator.Token objects.
+// The first error short-circuits the chain.
+func NewFailOnError(authTokenHandlers ...authenticator.Token) authenticator.Token {
+	if len(authTokenHandlers) == 1 {
+		return authTokenHandlers[0]
+	}
+	return &unionAuthTokenHandler{Handlers: authTokenHandlers, FailOnError: true}
+}
+
+// AuthenticateToken authenticates the token using a chain of authenticator.Token objects.
+func (authHandler *unionAuthTokenHandler) AuthenticateToken(token string) (user.Info, bool, error) {
+	var errlist []error
+	for _, currAuthRequestHandler := range authHandler.Handlers {
+		info, ok, err := currAuthRequestHandler.AuthenticateToken(token)
+		if err != nil {
+			if authHandler.FailOnError {
+				return info, ok, err
+			}
+			errlist = append(errlist, err)
+			continue
+		}
+
+		if ok {
+			return info, ok, err
+		}
+	}
+
+	return nil, false, utilerrors.NewAggregate(errlist)
+}