| // Copyright Istio 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 tokenmanager |
| |
| import ( |
| "errors" |
| "fmt" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/bootstrap/platform" |
| "github.com/apache/dubbo-go-pixiu/pkg/security" |
| "github.com/apache/dubbo-go-pixiu/security/pkg/stsservice/tokenmanager/google" |
| ) |
| |
| const ( |
| // GoogleTokenExchange is the name of the google token exchange service. |
| GoogleTokenExchange = "GoogleTokenExchange" |
| ) |
| |
| // Plugin provides common interfaces for specific token exchange services. |
| type Plugin interface { |
| ExchangeToken(parameters security.StsRequestParameters) ([]byte, error) |
| DumpPluginStatus() ([]byte, error) |
| // GetMetadata returns the metadata headers related to the token |
| GetMetadata(forCA bool, xdsAuthProvider, token string) (map[string]string, error) |
| } |
| |
| type TokenManager struct { |
| plugin Plugin |
| } |
| |
| type Config struct { |
| CredFetcher security.CredFetcher |
| TrustDomain string |
| } |
| |
| // GCPProjectInfo stores GCP project information, including project number, |
| // project ID, cluster location, cluster name |
| type GCPProjectInfo struct { |
| Number string |
| id string |
| cluster string |
| clusterLocation string |
| clusterURL string |
| } |
| |
| func GetGCPProjectInfo() GCPProjectInfo { |
| info := GCPProjectInfo{} |
| if platform.IsGCP() { |
| md := platform.NewGCP().Metadata() |
| if projectNum, found := md[platform.GCPProjectNumber]; found { |
| info.Number = projectNum |
| } |
| if projectID, found := md[platform.GCPProject]; found { |
| info.id = projectID |
| } |
| if clusterName, found := md[platform.GCPCluster]; found { |
| info.cluster = clusterName |
| } |
| if clusterLocation, found := md[platform.GCPLocation]; found { |
| info.clusterLocation = clusterLocation |
| } |
| if clusterURL, found := md[platform.GCPClusterURL]; found { |
| info.clusterURL = clusterURL |
| } |
| } |
| return info |
| } |
| |
| // CreateTokenManager creates a token manager with specified type and returns |
| // that token manager |
| func CreateTokenManager(tokenManagerType string, config Config) (security.TokenManager, error) { |
| tm := &TokenManager{ |
| plugin: nil, |
| } |
| switch tokenManagerType { |
| case GoogleTokenExchange: |
| if projectInfo := GetGCPProjectInfo(); len(projectInfo.Number) > 0 { |
| if p, err := google.CreateTokenManagerPlugin(config.CredFetcher, config.TrustDomain, |
| projectInfo.Number, projectInfo.clusterURL, true); err == nil { |
| tm.plugin = p |
| } else { |
| return nil, err |
| } |
| } else { |
| return nil, fmt.Errorf("%v token manager specified but failed to ready GCP project information", GoogleTokenExchange) |
| } |
| } |
| return tm, nil |
| } |
| |
| func (tm *TokenManager) GenerateToken(parameters security.StsRequestParameters) ([]byte, error) { |
| if tm.plugin != nil { |
| return tm.plugin.ExchangeToken(parameters) |
| } |
| return nil, errors.New("no plugin is found") |
| } |
| |
| func (tm *TokenManager) DumpTokenStatus() ([]byte, error) { |
| if tm.plugin != nil { |
| return tm.plugin.DumpPluginStatus() |
| } |
| return nil, errors.New("no plugin is found") |
| } |
| |
| func (tm *TokenManager) GetMetadata(forCA bool, xdsAuthProvider, token string) (map[string]string, error) { |
| if tm.plugin != nil { |
| return tm.plugin.GetMetadata(forCA, xdsAuthProvider, token) |
| } |
| // If no plugin, for an non-empty token, place the token in the authorization header. |
| if len(token) > 0 { |
| return map[string]string{ |
| "authorization": "Bearer " + token, |
| }, nil |
| } |
| // Otherwise, return an error |
| return nil, errors.New("no plugin is found and token is empty in token manager") |
| } |
| |
| // SetPlugin sets token exchange plugin for testing purposes only. |
| func (tm *TokenManager) SetPlugin(p Plugin) { |
| tm.plugin = p |
| } |