mirror of https://github.com/hashicorp/consul
137 lines
3.7 KiB
Go
137 lines
3.7 KiB
Go
// Copyright 2015 go-dockerclient authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package docker
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import (
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"bytes"
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"encoding/base64"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"os"
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"path"
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"strings"
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)
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// ErrCannotParseDockercfg is the error returned by NewAuthConfigurations when the dockercfg cannot be parsed.
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var ErrCannotParseDockercfg = errors.New("Failed to read authentication from dockercfg")
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// AuthConfiguration represents authentication options to use in the PushImage
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// method. It represents the authentication in the Docker index server.
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type AuthConfiguration struct {
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Username string `json:"username,omitempty"`
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Password string `json:"password,omitempty"`
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Email string `json:"email,omitempty"`
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ServerAddress string `json:"serveraddress,omitempty"`
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}
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// AuthConfigurations represents authentication options to use for the
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// PushImage method accommodating the new X-Registry-Config header
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type AuthConfigurations struct {
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Configs map[string]AuthConfiguration `json:"configs"`
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}
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// AuthConfigurations119 is used to serialize a set of AuthConfigurations
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// for Docker API >= 1.19.
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type AuthConfigurations119 map[string]AuthConfiguration
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// dockerConfig represents a registry authentation configuration from the
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// .dockercfg file.
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type dockerConfig struct {
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Auth string `json:"auth"`
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Email string `json:"email"`
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}
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// NewAuthConfigurationsFromDockerCfg returns AuthConfigurations from the
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// ~/.dockercfg file.
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func NewAuthConfigurationsFromDockerCfg() (*AuthConfigurations, error) {
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var r io.Reader
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var err error
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p := path.Join(os.Getenv("HOME"), ".docker", "config.json")
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r, err = os.Open(p)
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if err != nil {
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p := path.Join(os.Getenv("HOME"), ".dockercfg")
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r, err = os.Open(p)
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if err != nil {
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return nil, err
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}
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}
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return NewAuthConfigurations(r)
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}
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// NewAuthConfigurations returns AuthConfigurations from a JSON encoded string in the
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// same format as the .dockercfg file.
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func NewAuthConfigurations(r io.Reader) (*AuthConfigurations, error) {
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var auth *AuthConfigurations
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confs, err := parseDockerConfig(r)
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if err != nil {
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return nil, err
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}
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auth, err = authConfigs(confs)
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if err != nil {
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return nil, err
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}
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return auth, nil
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}
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func parseDockerConfig(r io.Reader) (map[string]dockerConfig, error) {
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buf := new(bytes.Buffer)
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buf.ReadFrom(r)
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byteData := buf.Bytes()
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var confsWrapper map[string]map[string]dockerConfig
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if err := json.Unmarshal(byteData, &confsWrapper); err == nil {
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if confs, ok := confsWrapper["auths"]; ok {
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return confs, nil
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}
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}
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var confs map[string]dockerConfig
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if err := json.Unmarshal(byteData, &confs); err != nil {
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return nil, err
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}
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return confs, nil
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}
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// authConfigs converts a dockerConfigs map to a AuthConfigurations object.
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func authConfigs(confs map[string]dockerConfig) (*AuthConfigurations, error) {
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c := &AuthConfigurations{
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Configs: make(map[string]AuthConfiguration),
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}
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for reg, conf := range confs {
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data, err := base64.StdEncoding.DecodeString(conf.Auth)
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if err != nil {
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return nil, err
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}
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userpass := strings.SplitN(string(data), ":", 2)
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if len(userpass) != 2 {
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return nil, ErrCannotParseDockercfg
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}
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c.Configs[reg] = AuthConfiguration{
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Email: conf.Email,
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Username: userpass[0],
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Password: userpass[1],
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ServerAddress: reg,
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}
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}
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return c, nil
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}
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// AuthCheck validates the given credentials. It returns nil if successful.
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//
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// See https://goo.gl/m2SleN for more details.
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func (c *Client) AuthCheck(conf *AuthConfiguration) error {
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if conf == nil {
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return fmt.Errorf("conf is nil")
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}
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resp, err := c.do("POST", "/auth", doOptions{data: conf})
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if err != nil {
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return err
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}
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resp.Body.Close()
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return nil
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}
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