mirror of https://github.com/k3s-io/k3s
117 lines
2.8 KiB
Go
117 lines
2.8 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package dockertools
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import (
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/url"
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"strings"
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"github.com/fsouza/go-dockerclient"
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"github.com/golang/glog"
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)
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const (
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dockerConfigFileLocation = ".dockercfg"
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)
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func readDockerConfigFile() (cfg dockerConfig, err error) {
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contents, err := ioutil.ReadFile(dockerConfigFileLocation)
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err = json.Unmarshal(contents, &cfg)
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return
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}
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// dockerConfig represents the config file used by the docker CLI.
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// This config that represents the credentials that should be used
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// when pulling images from specific image repositories.
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type dockerConfig map[string]dockerConfigEntry
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func (dc dockerConfig) addToKeyring(dk *dockerKeyring) {
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for loc, ident := range dc {
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creds := docker.AuthConfiguration{
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Username: ident.Username,
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Password: ident.Password,
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Email: ident.Email,
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}
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parsed, err := url.Parse(loc)
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if err != nil {
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glog.Errorf("Entry %q in dockercfg invalid (%v), ignoring", loc, err)
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continue
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}
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dk.add(parsed.Host+parsed.Path, creds)
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}
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}
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type dockerConfigEntry struct {
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Username string
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Password string
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Email string
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}
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// dockerConfigEntryWithAuth is used solely for deserializing the Auth field
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// into a dockerConfigEntry during JSON deserialization.
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type dockerConfigEntryWithAuth struct {
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Username string
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Password string
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Email string
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Auth string
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}
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func (ident *dockerConfigEntry) UnmarshalJSON(data []byte) error {
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var tmp dockerConfigEntryWithAuth
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err := json.Unmarshal(data, &tmp)
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if err != nil {
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return err
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}
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ident.Username = tmp.Username
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ident.Password = tmp.Password
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ident.Email = tmp.Email
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if len(tmp.Auth) == 0 {
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return nil
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}
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ident.Username, ident.Password, err = decodeDockerConfigFieldAuth(tmp.Auth)
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return err
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}
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// decodeDockerConfigFieldAuth deserializes the "auth" field from dockercfg into a
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// username and a password. The format of the auth field is base64(<username>:<password>).
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func decodeDockerConfigFieldAuth(field string) (username, password string, err error) {
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decoded, err := base64.StdEncoding.DecodeString(field)
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if err != nil {
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return
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}
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parts := strings.SplitN(string(decoded), ":", 2)
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if len(parts) != 2 {
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err = fmt.Errorf("unable to parse auth field")
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return
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}
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username = parts[0]
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password = parts[1]
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return
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}
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