| /* |
| 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 bearertoken |
| |
| import ( |
| "errors" |
| "net/http" |
| "strings" |
| |
| "k8s.io/apiserver/pkg/authentication/authenticator" |
| ) |
| |
| type Authenticator struct { |
| auth authenticator.Token |
| } |
| |
| func New(auth authenticator.Token) *Authenticator { |
| return &Authenticator{auth} |
| } |
| |
| var invalidToken = errors.New("invalid bearer token") |
| |
| func (a *Authenticator) AuthenticateRequest(req *http.Request) (*authenticator.Response, bool, error) { |
| auth := strings.TrimSpace(req.Header.Get("Authorization")) |
| if auth == "" { |
| return nil, false, nil |
| } |
| parts := strings.Split(auth, " ") |
| if len(parts) < 2 || strings.ToLower(parts[0]) != "bearer" { |
| return nil, false, nil |
| } |
| |
| token := parts[1] |
| |
| // Empty bearer tokens aren't valid |
| if len(token) == 0 { |
| return nil, false, nil |
| } |
| |
| resp, ok, err := a.auth.AuthenticateToken(req.Context(), token) |
| // if we authenticated successfully, go ahead and remove the bearer token so that no one |
| // is ever tempted to use it inside of the API server |
| if ok { |
| req.Header.Del("Authorization") |
| } |
| |
| // If the token authenticator didn't error, provide a default error |
| if !ok && err == nil { |
| err = invalidToken |
| } |
| |
| return resp, ok, err |
| } |