| // Copyright 2015 The etcd 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 auth |
| |
| import ( |
| "context" |
| "encoding/json" |
| "path" |
| |
| etcderr "github.com/coreos/etcd/error" |
| "github.com/coreos/etcd/etcdserver" |
| "github.com/coreos/etcd/etcdserver/etcdserverpb" |
| ) |
| |
| func (s *store) ensureAuthDirectories() error { |
| if s.ensuredOnce { |
| return nil |
| } |
| for _, res := range []string{StorePermsPrefix, StorePermsPrefix + "/users/", StorePermsPrefix + "/roles/"} { |
| ctx, cancel := context.WithTimeout(context.Background(), s.timeout) |
| defer cancel() |
| pe := false |
| rr := etcdserverpb.Request{ |
| Method: "PUT", |
| Path: res, |
| Dir: true, |
| PrevExist: &pe, |
| } |
| _, err := s.server.Do(ctx, rr) |
| if err != nil { |
| if e, ok := err.(*etcderr.Error); ok { |
| if e.ErrorCode == etcderr.EcodeNodeExist { |
| continue |
| } |
| } |
| plog.Errorf("failed to create auth directories in the store (%v)", err) |
| return err |
| } |
| } |
| ctx, cancel := context.WithTimeout(context.Background(), s.timeout) |
| defer cancel() |
| pe := false |
| rr := etcdserverpb.Request{ |
| Method: "PUT", |
| Path: StorePermsPrefix + "/enabled", |
| Val: "false", |
| PrevExist: &pe, |
| } |
| _, err := s.server.Do(ctx, rr) |
| if err != nil { |
| if e, ok := err.(*etcderr.Error); ok { |
| if e.ErrorCode == etcderr.EcodeNodeExist { |
| s.ensuredOnce = true |
| return nil |
| } |
| } |
| return err |
| } |
| s.ensuredOnce = true |
| return nil |
| } |
| |
| func (s *store) enableAuth() error { |
| _, err := s.updateResource("/enabled", true) |
| return err |
| } |
| func (s *store) disableAuth() error { |
| _, err := s.updateResource("/enabled", false) |
| return err |
| } |
| |
| func (s *store) detectAuth() bool { |
| if s.server == nil { |
| return false |
| } |
| value, err := s.requestResource("/enabled", false, false) |
| if err != nil { |
| if e, ok := err.(*etcderr.Error); ok { |
| if e.ErrorCode == etcderr.EcodeKeyNotFound { |
| return false |
| } |
| } |
| plog.Errorf("failed to detect auth settings (%s)", err) |
| return false |
| } |
| |
| var u bool |
| err = json.Unmarshal([]byte(*value.Event.Node.Value), &u) |
| if err != nil { |
| plog.Errorf("internal bookkeeping value for enabled isn't valid JSON (%v)", err) |
| return false |
| } |
| return u |
| } |
| |
| func (s *store) requestResource(res string, dir, quorum bool) (etcdserver.Response, error) { |
| ctx, cancel := context.WithTimeout(context.Background(), s.timeout) |
| defer cancel() |
| p := path.Join(StorePermsPrefix, res) |
| method := "GET" |
| if quorum { |
| method = "QGET" |
| } |
| rr := etcdserverpb.Request{ |
| Method: method, |
| Path: p, |
| Dir: dir, |
| } |
| return s.server.Do(ctx, rr) |
| } |
| |
| func (s *store) updateResource(res string, value interface{}) (etcdserver.Response, error) { |
| return s.setResource(res, value, true) |
| } |
| func (s *store) createResource(res string, value interface{}) (etcdserver.Response, error) { |
| return s.setResource(res, value, false) |
| } |
| func (s *store) setResource(res string, value interface{}, prevexist bool) (etcdserver.Response, error) { |
| err := s.ensureAuthDirectories() |
| if err != nil { |
| return etcdserver.Response{}, err |
| } |
| ctx, cancel := context.WithTimeout(context.Background(), s.timeout) |
| defer cancel() |
| data, err := json.Marshal(value) |
| if err != nil { |
| return etcdserver.Response{}, err |
| } |
| p := path.Join(StorePermsPrefix, res) |
| rr := etcdserverpb.Request{ |
| Method: "PUT", |
| Path: p, |
| Val: string(data), |
| PrevExist: &prevexist, |
| } |
| return s.server.Do(ctx, rr) |
| } |
| |
| func (s *store) deleteResource(res string) (etcdserver.Response, error) { |
| err := s.ensureAuthDirectories() |
| if err != nil { |
| return etcdserver.Response{}, err |
| } |
| ctx, cancel := context.WithTimeout(context.Background(), s.timeout) |
| defer cancel() |
| pex := true |
| p := path.Join(StorePermsPrefix, res) |
| rr := etcdserverpb.Request{ |
| Method: "DELETE", |
| Path: p, |
| PrevExist: &pex, |
| } |
| return s.server.Do(ctx, rr) |
| } |