| /* |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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 registry |
| |
| import ( |
| "encoding/base64" |
| "encoding/json" |
| "errors" |
| "fmt" |
| ) |
| |
| var ( |
| knownServersByRegistry = map[string]string{ |
| "docker.io": "https://index.docker.io/v1/", |
| } |
| ) |
| |
| // Auth contains basic information for authenticating against a container registry |
| type Auth struct { |
| Server string |
| Username string |
| Password string |
| |
| // additional information |
| Registry string |
| } |
| |
| type dockerConfigList struct { |
| Auths map[string]dockerConfig `json:"auths,omitempty"` |
| } |
| |
| type dockerConfig struct { |
| Auth string `json:"auth,omitempty"` |
| } |
| |
| // IsSet returns if information has been set on the object |
| func (a Auth) IsSet() bool { |
| return a.Server != "" || |
| a.Username != "" || |
| a.Password != "" |
| } |
| |
| // validate checks if all fields are populated correctly |
| func (a Auth) validate() error { |
| if a.getActualServer() == "" || a.Username == "" { |
| return errors.New("not enough information to generate a registry authentication file") |
| } |
| return nil |
| } |
| |
| // GenerateDockerConfig generates a Docker compatible config.json file |
| func (a Auth) GenerateDockerConfig() ([]byte, error) { |
| if err := a.validate(); err != nil { |
| return nil, err |
| } |
| content := a.generateDockerConfigObject() |
| return json.Marshal(content) |
| } |
| |
| func (a Auth) generateDockerConfigObject() dockerConfigList { |
| return dockerConfigList{ |
| map[string]dockerConfig{ |
| a.getActualServer(): { |
| a.encodedCredentials(), |
| }, |
| }, |
| } |
| } |
| |
| func (a Auth) getActualServer() string { |
| if a.Server != "" { |
| return a.Server |
| } |
| if p, ok := knownServersByRegistry[a.Registry]; ok { |
| return p |
| } |
| return a.Registry |
| } |
| |
| func (a Auth) encodedCredentials() string { |
| return base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", a.Username, a.Password))) |
| } |