| /* |
| Copyright 2014 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 ( |
| "net/http" |
| |
| utilerrors "k8s.io/apimachinery/pkg/util/errors" |
| "k8s.io/apiserver/pkg/authentication/authenticator" |
| "k8s.io/apiserver/pkg/authentication/user" |
| ) |
| |
| // unionAuthRequestHandler authenticates requests using a chain of authenticator.Requests |
| type unionAuthRequestHandler struct { |
| // Handlers is a chain of request authenticators to delegate to |
| Handlers []authenticator.Request |
| // FailOnError determines whether an error returns short-circuits the chain |
| FailOnError bool |
| } |
| |
| // New returns a request authenticator that validates credentials using a chain of authenticator.Request objects. |
| // The entire chain is tried until one succeeds. If all fail, an aggregate error is returned. |
| func New(authRequestHandlers ...authenticator.Request) authenticator.Request { |
| if len(authRequestHandlers) == 1 { |
| return authRequestHandlers[0] |
| } |
| return &unionAuthRequestHandler{Handlers: authRequestHandlers, FailOnError: false} |
| } |
| |
| // NewFailOnError returns a request authenticator that validates credentials using a chain of authenticator.Request objects. |
| // The first error short-circuits the chain. |
| func NewFailOnError(authRequestHandlers ...authenticator.Request) authenticator.Request { |
| if len(authRequestHandlers) == 1 { |
| return authRequestHandlers[0] |
| } |
| return &unionAuthRequestHandler{Handlers: authRequestHandlers, FailOnError: true} |
| } |
| |
| // AuthenticateRequest authenticates the request using a chain of authenticator.Request objects. |
| func (authHandler *unionAuthRequestHandler) AuthenticateRequest(req *http.Request) (user.Info, bool, error) { |
| var errlist []error |
| for _, currAuthRequestHandler := range authHandler.Handlers { |
| info, ok, err := currAuthRequestHandler.AuthenticateRequest(req) |
| 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) |
| } |