move dependencies to vendor

vendor/github.com/fsouza/go-dockerclient/auth.go

@@ -0,0 +1,136 @@
+// Copyright 2015 go-dockerclient authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package docker
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path"
+	"strings"
+)
+
+// ErrCannotParseDockercfg is the error returned by NewAuthConfigurations when the dockercfg cannot be parsed.
+var ErrCannotParseDockercfg = errors.New("Failed to read authentication from dockercfg")
+
+// AuthConfiguration represents authentication options to use in the PushImage
+// method. It represents the authentication in the Docker index server.
+type AuthConfiguration struct {
+	Username      string `json:"username,omitempty"`
+	Password      string `json:"password,omitempty"`
+	Email         string `json:"email,omitempty"`
+	ServerAddress string `json:"serveraddress,omitempty"`
+}
+
+// AuthConfigurations represents authentication options to use for the
+// PushImage method accommodating the new X-Registry-Config header
+type AuthConfigurations struct {
+	Configs map[string]AuthConfiguration `json:"configs"`
+}
+
+// AuthConfigurations119 is used to serialize a set of AuthConfigurations
+// for Docker API >= 1.19.
+type AuthConfigurations119 map[string]AuthConfiguration
+
+// dockerConfig represents a registry authentation configuration from the
+// .dockercfg file.
+type dockerConfig struct {
+	Auth  string `json:"auth"`
+	Email string `json:"email"`
+}
+
+// NewAuthConfigurationsFromDockerCfg returns AuthConfigurations from the
+// ~/.dockercfg file.
+func NewAuthConfigurationsFromDockerCfg() (*AuthConfigurations, error) {
+	var r io.Reader
+	var err error
+	p := path.Join(os.Getenv("HOME"), ".docker", "config.json")
+	r, err = os.Open(p)
+	if err != nil {
+		p := path.Join(os.Getenv("HOME"), ".dockercfg")
+		r, err = os.Open(p)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return NewAuthConfigurations(r)
+}
+
+// NewAuthConfigurations returns AuthConfigurations from a JSON encoded string in the
+// same format as the .dockercfg file.
+func NewAuthConfigurations(r io.Reader) (*AuthConfigurations, error) {
+	var auth *AuthConfigurations
+	confs, err := parseDockerConfig(r)
+	if err != nil {
+		return nil, err
+	}
+	auth, err = authConfigs(confs)
+	if err != nil {
+		return nil, err
+	}
+	return auth, nil
+}
+
+func parseDockerConfig(r io.Reader) (map[string]dockerConfig, error) {
+	buf := new(bytes.Buffer)
+	buf.ReadFrom(r)
+	byteData := buf.Bytes()
+
+	var confsWrapper map[string]map[string]dockerConfig
+	if err := json.Unmarshal(byteData, &confsWrapper); err == nil {
+		if confs, ok := confsWrapper["auths"]; ok {
+			return confs, nil
+		}
+	}
+
+	var confs map[string]dockerConfig
+	if err := json.Unmarshal(byteData, &confs); err != nil {
+		return nil, err
+	}
+	return confs, nil
+}
+
+// authConfigs converts a dockerConfigs map to a AuthConfigurations object.
+func authConfigs(confs map[string]dockerConfig) (*AuthConfigurations, error) {
+	c := &AuthConfigurations{
+		Configs: make(map[string]AuthConfiguration),
+	}
+	for reg, conf := range confs {
+		data, err := base64.StdEncoding.DecodeString(conf.Auth)
+		if err != nil {
+			return nil, err
+		}
+		userpass := strings.SplitN(string(data), ":", 2)
+		if len(userpass) != 2 {
+			return nil, ErrCannotParseDockercfg
+		}
+		c.Configs[reg] = AuthConfiguration{
+			Email:         conf.Email,
+			Username:      userpass[0],
+			Password:      userpass[1],
+			ServerAddress: reg,
+		}
+	}
+	return c, nil
+}
+
+// AuthCheck validates the given credentials. It returns nil if successful.
+//
+// See https://goo.gl/m2SleN for more details.
+func (c *Client) AuthCheck(conf *AuthConfiguration) error {
+	if conf == nil {
+		return fmt.Errorf("conf is nil")
+	}
+	resp, err := c.do("POST", "/auth", doOptions{data: conf})
+	if err != nil {
+		return err
+	}
+	resp.Body.Close()
+	return nil
+}