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package registry // import "github.com/docker/docker/registry"
import (
"io/ioutil"
"net/http"
"net/url"
"strings"
"time"
"github.com/docker/distribution/registry/client/auth"
"github.com/docker/distribution/registry/client/auth/challenge"
"github.com/docker/distribution/registry/client/transport"
"github.com/docker/docker/api/types"
registrytypes "github.com/docker/docker/api/types/registry"
"github.com/docker/docker/errdefs"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
// AuthClientID is used the ClientID used for the token server
AuthClientID = "docker"
)
// loginV1 tries to register/login to the v1 registry server.
func loginV1(authConfig *types.AuthConfig, apiEndpoint APIEndpoint, userAgent string) (string, string, error) {
registryEndpoint := apiEndpoint.ToV1Endpoint(userAgent, nil)
serverAddress := registryEndpoint.String()
logrus.Debugf("attempting v1 login to registry endpoint %s", serverAddress)
if serverAddress == "" {
return "", "", errdefs.System(errors.New("server Error: Server Address not set"))
}
req, err := http.NewRequest("GET", serverAddress+"users/", nil)
if err != nil {
return "", "", err
}
req.SetBasicAuth(authConfig.Username, authConfig.Password)
resp, err := registryEndpoint.client.Do(req)
if err != nil {
// fallback when request could not be completed
return "", "", fallbackError{
err: err,
}
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", "", errdefs.System(err)
}
switch resp.StatusCode {
case http.StatusOK:
return "Login Succeeded", "", nil
case http.StatusUnauthorized:
return "", "", errdefs.Unauthorized(errors.New("Wrong login/password, please try again"))
case http.StatusForbidden:
// *TODO: Use registry configuration to determine what this says, if anything?
return "", "", errdefs.Forbidden(errors.Errorf("Login: Account is not active. Please see the documentation of the registry %s for instructions how to activate it.", serverAddress))
case http.StatusInternalServerError:
logrus.Errorf("%s returned status code %d. Response Body :\n%s", req.URL.String(), resp.StatusCode, body)
return "", "", errdefs.System(errors.New("Internal Server Error"))
}
return "", "", errdefs.System(errors.Errorf("Login: %s (Code: %d; Headers: %s)", body,
resp.StatusCode, resp.Header))
}
type loginCredentialStore struct {
authConfig *types.AuthConfig
}
func (lcs loginCredentialStore) Basic(*url.URL) (string, string) {
return lcs.authConfig.Username, lcs.authConfig.Password
}
func (lcs loginCredentialStore) RefreshToken(*url.URL, string) string {
return lcs.authConfig.IdentityToken
}
func (lcs loginCredentialStore) SetRefreshToken(u *url.URL, service, token string) {
lcs.authConfig.IdentityToken = token
}
type staticCredentialStore struct {
auth *types.AuthConfig
}
// NewStaticCredentialStore returns a credential store
// which always returns the same credential values.
func NewStaticCredentialStore(auth *types.AuthConfig) auth.CredentialStore {
return staticCredentialStore{
auth: auth,
}
}
func (scs staticCredentialStore) Basic(*url.URL) (string, string) {
if scs.auth == nil {
return "", ""
}
return scs.auth.Username, scs.auth.Password
}
func (scs staticCredentialStore) RefreshToken(*url.URL, string) string {
if scs.auth == nil {
return ""
}
return scs.auth.IdentityToken
}
func (scs staticCredentialStore) SetRefreshToken(*url.URL, string, string) {
}
type fallbackError struct {
err error
}
func (err fallbackError) Error() string {
return err.err.Error()
}
// loginV2 tries to login to the v2 registry server. The given registry
// endpoint will be pinged to get authorization challenges. These challenges
// will be used to authenticate against the registry to validate credentials.
func loginV2(authConfig *types.AuthConfig, endpoint APIEndpoint, userAgent string) (string, string, error) {
logrus.Debugf("attempting v2 login to registry endpoint %s", strings.TrimRight(endpoint.URL.String(), "/")+"/v2/")
modifiers := Headers(userAgent, nil)
authTransport := transport.NewTransport(NewTransport(endpoint.TLSConfig), modifiers...)
credentialAuthConfig := *authConfig
creds := loginCredentialStore{
authConfig: &credentialAuthConfig,
}
loginClient, foundV2, err := v2AuthHTTPClient(endpoint.URL, authTransport, modifiers, creds, nil)
if err != nil {
return "", "", err
}
endpointStr := strings.TrimRight(endpoint.URL.String(), "/") + "/v2/"
req, err := http.NewRequest("GET", endpointStr, nil)
if err != nil {
if !foundV2 {
err = fallbackError{err: err}
}
return "", "", err
}
resp, err := loginClient.Do(req)
if err != nil {
err = translateV2AuthError(err)
if !foundV2 {
err = fallbackError{err: err}
}
return "", "", err
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
return "Login Succeeded", credentialAuthConfig.IdentityToken, nil
}
// TODO(dmcgowan): Attempt to further interpret result, status code and error code string
err = errors.Errorf("login attempt to %s failed with status: %d %s", endpointStr, resp.StatusCode, http.StatusText(resp.StatusCode))
if !foundV2 {
err = fallbackError{err: err}
}
return "", "", err
}
func v2AuthHTTPClient(endpoint *url.URL, authTransport http.RoundTripper, modifiers []transport.RequestModifier, creds auth.CredentialStore, scopes []auth.Scope) (*http.Client, bool, error) {
challengeManager, foundV2, err := PingV2Registry(endpoint, authTransport)
if err != nil {
if !foundV2 {
err = fallbackError{err: err}
}
return nil, foundV2, err
}
tokenHandlerOptions := auth.TokenHandlerOptions{
Transport: authTransport,
Credentials: creds,
OfflineAccess: true,
ClientID: AuthClientID,
Scopes: scopes,
}
tokenHandler := auth.NewTokenHandlerWithOptions(tokenHandlerOptions)
basicHandler := auth.NewBasicHandler(creds)
modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler))
tr := transport.NewTransport(authTransport, modifiers...)
return &http.Client{
Transport: tr,
Timeout: 15 * time.Second,
}, foundV2, nil
}
// ConvertToHostname converts a registry url which has http|https prepended
// to just an hostname.
func ConvertToHostname(url string) string {
stripped := url
if strings.HasPrefix(url, "http://") {
stripped = strings.TrimPrefix(url, "http://")
} else if strings.HasPrefix(url, "https://") {
stripped = strings.TrimPrefix(url, "https://")
}
nameParts := strings.SplitN(stripped, "/", 2)
return nameParts[0]
}
// ResolveAuthConfig matches an auth configuration to a server address or a URL
func ResolveAuthConfig(authConfigs map[string]types.AuthConfig, index *registrytypes.IndexInfo) types.AuthConfig {
configKey := GetAuthConfigKey(index)
// First try the happy case
if c, found := authConfigs[configKey]; found || index.Official {
return c
}
// Maybe they have a legacy config file, we will iterate the keys converting
// them to the new format and testing
for registry, ac := range authConfigs {
if configKey == ConvertToHostname(registry) {
return ac
}
}
// When all else fails, return an empty auth config
return types.AuthConfig{}
}
// PingResponseError is used when the response from a ping
// was received but invalid.
type PingResponseError struct {
Err error
}
func (err PingResponseError) Error() string {
return err.Err.Error()
}
// PingV2Registry attempts to ping a v2 registry and on success return a
// challenge manager for the supported authentication types and
// whether v2 was confirmed by the response. If a response is received but
// cannot be interpreted a PingResponseError will be returned.
// nolint: interfacer
func PingV2Registry(endpoint *url.URL, transport http.RoundTripper) (challenge.Manager, bool, error) {
var (
foundV2 = false
v2Version = auth.APIVersion{
Type: "registry",
Version: "2.0",
}
)
pingClient := &http.Client{
Transport: transport,
Timeout: 15 * time.Second,
}
endpointStr := strings.TrimRight(endpoint.String(), "/") + "/v2/"
req, err := http.NewRequest("GET", endpointStr, nil)
if err != nil {
return nil, false, err
}
resp, err := pingClient.Do(req)
if err != nil {
return nil, false, err
}
defer resp.Body.Close()
versions := auth.APIVersions(resp, DefaultRegistryVersionHeader)
for _, pingVersion := range versions {
if pingVersion == v2Version {
// The version header indicates we're definitely
// talking to a v2 registry. So don't allow future
// fallbacks to the v1 protocol.
foundV2 = true
break
}
}
challengeManager := challenge.NewSimpleManager()
if err := challengeManager.AddResponse(resp); err != nil {
return nil, foundV2, PingResponseError{
Err: err,
}
}
return challengeManager, foundV2, nil
}