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auth_config.go
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/
auth_config.go
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package docker_helpers
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"os"
"os/user"
"path"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/cliconfig/configfile"
"github.com/docker/docker/pkg/homedir"
)
// DefaultDockerRegistry is the name of the index
const DefaultDockerRegistry = "docker.io"
// EncodeAuthConfig constructs a token from an AuthConfig, suitable for
// authorizing against the Docker API with.
func EncodeAuthConfig(authConfig *types.AuthConfig) (string, error) {
var buf bytes.Buffer
if err := json.NewEncoder(&buf).Encode(authConfig); err != nil {
return "", err
}
return base64.URLEncoding.EncodeToString(buf.Bytes()), nil
}
// SplitDockerImageName breaks a reposName into an index name and remote name
func SplitDockerImageName(reposName string) (string, string) {
nameParts := strings.SplitN(reposName, "/", 2)
var indexName, remoteName string
if len(nameParts) == 1 || (!strings.Contains(nameParts[0], ".") &&
!strings.Contains(nameParts[0], ":") && nameParts[0] != "localhost") {
// This is a Docker Index repos (ex: samalba/hipache or ubuntu)
// 'docker.io'
indexName = DefaultDockerRegistry
remoteName = reposName
} else {
indexName = nameParts[0]
remoteName = nameParts[1]
}
if indexName == "index."+DefaultDockerRegistry {
indexName = DefaultDockerRegistry
}
return indexName, remoteName
}
var HomeDirectory = homedir.Get()
func ReadDockerAuthConfigsFromHomeDir(userName string) (map[string]types.AuthConfig, error) {
homeDir := HomeDirectory
if userName != "" {
u, err := user.Lookup(userName)
if err != nil {
return nil, err
}
homeDir = u.HomeDir
}
if homeDir == "" {
return nil, fmt.Errorf("Failed to get home directory")
}
p := path.Join(homeDir, ".docker", "config.json")
r, err := os.Open(p)
defer r.Close()
if err != nil {
p := path.Join(homeDir, ".dockercfg")
r, err = os.Open(p)
if err != nil && !os.IsNotExist(err) {
return nil, err
}
}
if r == nil {
return make(map[string]types.AuthConfig), nil
}
return ReadAuthConfigsFromReader(r)
}
func ReadAuthConfigsFromReader(r io.Reader) (map[string]types.AuthConfig, error) {
config := &configfile.ConfigFile{}
if err := config.LoadFromReader(r); err != nil {
return nil, err
}
return config.AuthConfigs, nil
}
// ResolveDockerAuthConfig taken from: https://github.com/docker/docker/blob/master/registry/auth.go
func ResolveDockerAuthConfig(indexName string, configs map[string]types.AuthConfig) *types.AuthConfig {
if configs == nil {
return nil
}
convertToHostname := func(url string) string {
stripped := url
if strings.HasPrefix(url, "http://") {
stripped = strings.Replace(url, "http://", "", 1)
} else if strings.HasPrefix(url, "https://") {
stripped = strings.Replace(url, "https://", "", 1)
}
nameParts := strings.SplitN(stripped, "/", 2)
if nameParts[0] == "index."+DefaultDockerRegistry {
return DefaultDockerRegistry
}
return nameParts[0]
}
// Maybe they have a legacy config file, we will iterate the keys converting
// them to the new format and testing
for registry, authConfig := range configs {
if indexName == convertToHostname(registry) {
return &authConfig
}
}
// When all else fails, return an empty auth config
return nil
}