func (p *v1Pusher) Push() (fallback bool, err error) {
	tlsConfig, err := p.registryService.TLSConfig(p.repoInfo.Index.Name)
	if err != nil {
		return false, err
	}
	// Adds Docker-specific headers as well as user-specified headers (metaHeaders)
	tr := transport.NewTransport(
		// TODO(tiborvass): was NoTimeout
		registry.NewTransport(tlsConfig),
		registry.DockerHeaders(p.config.MetaHeaders)...,
	)
	client := registry.HTTPClient(tr)
	v1Endpoint, err := p.endpoint.ToV1Endpoint(p.config.MetaHeaders)
	if err != nil {
		logrus.Debugf("Could not get v1 endpoint: %v", err)
		return true, err
	}
	p.session, err = registry.NewSession(client, p.config.AuthConfig, v1Endpoint)
	if err != nil {
		// TODO(dmcgowan): Check if should fallback
		return true, err
	}
	if err := p.pushRepository(p.config.Tag); err != nil {
		// TODO(dmcgowan): Check if should fallback
		return false, err
	}
	return false, nil
}

func (p *v1Puller) Pull(tag string) (fallback bool, err error) {
	if utils.DigestReference(tag) {
		// Allowing fallback, because HTTPS v1 is before HTTP v2
		return true, registry.ErrNoSupport{errors.New("Cannot pull by digest with v1 registry")}
	}

	tlsConfig, err := p.registryService.TLSConfig(p.repoInfo.Index.Name)
	if err != nil {
		return false, err
	}
	// Adds Docker-specific headers as well as user-specified headers (metaHeaders)
	tr := transport.NewTransport(
		// TODO(tiborvass): was ReceiveTimeout
		registry.NewTransport(tlsConfig),
		registry.DockerHeaders(p.config.MetaHeaders)...,
	)
	client := registry.HTTPClient(tr)
	v1Endpoint, err := p.endpoint.ToV1Endpoint(p.config.MetaHeaders)
	if err != nil {
		logrus.Debugf("Could not get v1 endpoint: %v", err)
		return true, err
	}
	p.session, err = registry.NewSession(client, p.config.AuthConfig, v1Endpoint)
	if err != nil {
		// TODO(dmcgowan): Check if should fallback
		logrus.Debugf("Fallback from error: %s", err)
		return true, err
	}
	if err := p.pullRepository(tag); err != nil {
		// TODO(dmcgowan): Check if should fallback
		return false, err
	}
	return false, nil
}

func (s *TagStore) pullFromV2Mirror(mirrorEndpoint *registry.Endpoint, repoInfo *registry.RepositoryInfo,
	imagePullConfig *ImagePullConfig, tag string, sf *streamformatter.StreamFormatter, logName string) error {

	tr := transport.NewTransport(
		registry.NewTransport(registry.ReceiveTimeout, mirrorEndpoint.IsSecure),
		registry.DockerHeaders(imagePullConfig.MetaHeaders)...,
	)
	client := registry.HTTPClient(tr)
	mirrorSession, err := registry.NewSession(client, &cliconfig.AuthConfig{}, mirrorEndpoint)
	if err != nil {
		return err
	}
	logrus.Debugf("Pulling v2 repository with local name %q from %s", repoInfo.LocalName, mirrorEndpoint.URL)
	if err := s.pullV2Repository(mirrorSession, imagePullConfig.OutStream, repoInfo, tag, sf); err != nil {
		return err
	}
	s.eventsService.Log("pull", logName, "")
	return nil
}

func (p *v1Puller) Pull(ref reference.Named) (fallback bool, err error) {
	if _, isDigested := ref.(reference.Digested); isDigested {
		// Allowing fallback, because HTTPS v1 is before HTTP v2
		return true, registry.ErrNoSupport{errors.New("Cannot pull by digest with v1 registry")}
	}

	tlsConfig, err := p.config.RegistryService.TLSConfig(p.repoInfo.Index.Name)
	if err != nil {
		return false, err
	}
	// Adds Docker-specific headers as well as user-specified headers (metaHeaders)
	tr := transport.NewTransport(
		// TODO(tiborvass): was ReceiveTimeout
		registry.NewTransport(tlsConfig),
		registry.DockerHeaders(p.config.MetaHeaders)...,
	)
	client := registry.HTTPClient(tr)
	v1Endpoint, err := p.endpoint.ToV1Endpoint(p.config.MetaHeaders)
	if err != nil {
		logrus.Debugf("Could not get v1 endpoint: %v", err)
		return true, err
	}
	p.session, err = registry.NewSession(client, p.config.AuthConfig, v1Endpoint)
	if err != nil {
		// TODO(dmcgowan): Check if should fallback
		logrus.Debugf("Fallback from error: %s", err)
		return true, err
	}
	if err := p.pullRepository(ref); err != nil {
		// TODO(dmcgowan): Check if should fallback
		return false, err
	}
	out := p.config.OutStream
	out.Write(p.sf.FormatStatus("", "%s: this image was pulled from a legacy registry.  Important: This registry version will not be supported in future versions of docker.", p.repoInfo.CanonicalName.Name()))

	return false, nil
}

func (p *v1Puller) Pull(ctx context.Context, ref reference.Named) error {
	if _, isCanonical := ref.(reference.Canonical); isCanonical {
		// Allowing fallback, because HTTPS v1 is before HTTP v2
		return fallbackError{err: ErrNoSupport{Err: errors.New("Cannot pull by digest with v1 registry")}}
	}

	tlsConfig, err := p.config.RegistryService.TLSConfig(p.repoInfo.Index.Name)
	if err != nil {
		return err
	}
	// Adds Docker-specific headers as well as user-specified headers (metaHeaders)
	tr := transport.NewTransport(
		// TODO(tiborvass): was ReceiveTimeout
		registry.NewTransport(tlsConfig),
		registry.DockerHeaders(dockerversion.DockerUserAgent(), p.config.MetaHeaders)...,
	)
	client := registry.HTTPClient(tr)
	v1Endpoint, err := p.endpoint.ToV1Endpoint(dockerversion.DockerUserAgent(), p.config.MetaHeaders)
	if err != nil {
		logrus.Debugf("Could not get v1 endpoint: %v", err)
		return fallbackError{err: err}
	}
	p.session, err = registry.NewSession(client, p.config.AuthConfig, v1Endpoint)
	if err != nil {
		// TODO(dmcgowan): Check if should fallback
		logrus.Debugf("Fallback from error: %s", err)
		return fallbackError{err: err}
	}
	if err := p.pullRepository(ctx, ref); err != nil {
		// TODO(dmcgowan): Check if should fallback
		return err
	}
	progress.Message(p.config.ProgressOutput, "", p.repoInfo.FullName()+": this image was pulled from a legacy registry.  Important: This registry version will not be supported in future versions of docker.")

	return nil
}

func (mf *v1ManifestFetcher) Fetch(ctx context.Context, ref reference.Named) (*types.ImageInspect, error) {
	var (
		imgInspect *types.ImageInspect
	)
	if _, isCanonical := ref.(reference.Canonical); isCanonical {
		// Allowing fallback, because HTTPS v1 is before HTTP v2
		return nil, fallbackError{err: dockerdistribution.ErrNoSupport{errors.New("Cannot pull by digest with v1 registry")}}
	}
	tlsConfig, err := mf.service.TLSConfig(mf.repoInfo.Index.Name)
	if err != nil {
		return nil, err
	}
	// Adds Docker-specific headers as well as user-specified headers (metaHeaders)
	tr := transport.NewTransport(
		registry.NewTransport(tlsConfig),
		//registry.DockerHeaders(mf.config.MetaHeaders)...,
		registry.DockerHeaders(dockerversion.DockerUserAgent(), nil)...,
	)
	client := registry.HTTPClient(tr)
	//v1Endpoint, err := mf.endpoint.ToV1Endpoint(mf.config.MetaHeaders)
	v1Endpoint, err := mf.endpoint.ToV1Endpoint(dockerversion.DockerUserAgent(), nil)
	if err != nil {
		logrus.Debugf("Could not get v1 endpoint: %v", err)
		return nil, fallbackError{err: err}
	}
	mf.session, err = registry.NewSession(client, &mf.authConfig, v1Endpoint)
	if err != nil {
		logrus.Debugf("Fallback from error: %s", err)
		return nil, fallbackError{err: err}
	}
	imgInspect, err = mf.fetchWithSession(ctx, ref)
	if err != nil {
		return nil, err
	}
	return imgInspect, nil
}

func (cli *DockerCli) getNotaryRepository(repoInfo *registry.RepositoryInfo, authConfig types.AuthConfig) (*client.NotaryRepository, error) {
	server, err := trustServer(repoInfo.Index)
	if err != nil {
		return nil, err
	}

	var cfg = tlsconfig.ClientDefault
	cfg.InsecureSkipVerify = !repoInfo.Index.Secure

	// Get certificate base directory
	certDir, err := cli.certificateDirectory(server)
	if err != nil {
		return nil, err
	}
	logrus.Debugf("reading certificate directory: %s", certDir)

	if err := registry.ReadCertsDirectory(&cfg, certDir); err != nil {
		return nil, err
	}

	base := &http.Transport{
		Proxy: http.ProxyFromEnvironment,
		Dial: (&net.Dialer{
			Timeout:   30 * time.Second,
			KeepAlive: 30 * time.Second,
			DualStack: true,
		}).Dial,
		TLSHandshakeTimeout: 10 * time.Second,
		TLSClientConfig:     &cfg,
		DisableKeepAlives:   true,
	}

	// Skip configuration headers since request is not going to Docker daemon
	modifiers := registry.DockerHeaders(dockerversion.DockerUserAgent(), http.Header{})
	authTransport := transport.NewTransport(base, modifiers...)
	pingClient := &http.Client{
		Transport: authTransport,
		Timeout:   5 * time.Second,
	}
	endpointStr := server + "/v2/"
	req, err := http.NewRequest("GET", endpointStr, nil)
	if err != nil {
		return nil, err
	}

	challengeManager := auth.NewSimpleChallengeManager()

	resp, err := pingClient.Do(req)
	if err != nil {
		// Ignore error on ping to operate in offline mode
		logrus.Debugf("Error pinging notary server %q: %s", endpointStr, err)
	} else {
		defer resp.Body.Close()

		// Add response to the challenge manager to parse out
		// authentication header and register authentication method
		if err := challengeManager.AddResponse(resp); err != nil {
			return nil, err
		}
	}

	creds := simpleCredentialStore{auth: authConfig}
	tokenHandler := auth.NewTokenHandler(authTransport, creds, repoInfo.FullName(), "push", "pull")
	basicHandler := auth.NewBasicHandler(creds)
	modifiers = append(modifiers, transport.RequestModifier(auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler)))
	tr := transport.NewTransport(base, modifiers...)

	return client.NewNotaryRepository(cli.trustDirectory(), repoInfo.FullName(), server, tr, cli.getPassphraseRetriever())
}

// NewV2Repository returns a repository (v2 only). It creates a HTTP transport
// providing timeout settings and authentication support, and also verifies the
// remote API version.
func NewV2Repository(repoInfo *registry.RepositoryInfo, endpoint registry.APIEndpoint, metaHeaders http.Header, authConfig *cliconfig.AuthConfig, actions ...string) (distribution.Repository, error) {
	ctx := context.Background()

	repoName := repoInfo.CanonicalName
	// If endpoint does not support CanonicalName, use the RemoteName instead
	if endpoint.TrimHostname {
		repoName = repoInfo.RemoteName
	}

	// TODO(dmcgowan): Call close idle connections when complete, use keep alive
	base := &http.Transport{
		Proxy: http.ProxyFromEnvironment,
		Dial: (&net.Dialer{
			Timeout:   30 * time.Second,
			KeepAlive: 30 * time.Second,
			DualStack: true,
		}).Dial,
		TLSHandshakeTimeout: 10 * time.Second,
		TLSClientConfig:     endpoint.TLSConfig,
		// TODO(dmcgowan): Call close idle connections when complete and use keep alive
		DisableKeepAlives: true,
	}

	modifiers := registry.DockerHeaders(metaHeaders)
	authTransport := transport.NewTransport(base, modifiers...)
	pingClient := &http.Client{
		Transport: authTransport,
		Timeout:   15 * time.Second,
	}
	endpointStr := strings.TrimRight(endpoint.URL, "/") + "/v2/"
	req, err := http.NewRequest("GET", endpointStr, nil)
	if err != nil {
		return nil, err
	}
	resp, err := pingClient.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	versions := auth.APIVersions(resp, endpoint.VersionHeader)
	if endpoint.VersionHeader != "" && len(endpoint.Versions) > 0 {
		var foundVersion bool
		for _, version := range endpoint.Versions {
			for _, pingVersion := range versions {
				if version == pingVersion {
					foundVersion = true
				}
			}
		}
		if !foundVersion {
			return nil, errors.New("endpoint does not support v2 API")
		}
	}

	challengeManager := auth.NewSimpleChallengeManager()
	if err := challengeManager.AddResponse(resp); err != nil {
		return nil, err
	}

	creds := dumbCredentialStore{auth: authConfig}
	tokenHandler := auth.NewTokenHandler(authTransport, creds, repoName, actions...)
	basicHandler := auth.NewBasicHandler(creds)
	modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler))
	tr := transport.NewTransport(base, modifiers...)

	return client.NewRepository(ctx, repoName, endpoint.URL, tr)
}

// NewV2Repository returns a repository (v2 only). It creates a HTTP transport
// providing timeout settings and authentication support, and also verifies the
// remote API version.
func NewV2Repository(ctx context.Context, repoInfo *registry.RepositoryInfo, endpoint registry.APIEndpoint, metaHeaders http.Header, authConfig *types.AuthConfig, actions ...string) (repo distribution.Repository, foundVersion bool, err error) {
	repoName := repoInfo.FullName()
	// If endpoint does not support CanonicalName, use the RemoteName instead
	if endpoint.TrimHostname {
		repoName = repoInfo.RemoteName()
	}

	// TODO(dmcgowan): Call close idle connections when complete, use keep alive
	base := &http.Transport{
		Proxy: http.ProxyFromEnvironment,
		Dial: func(network, address string) (net.Conn, error) {
			dialer := &net.Dialer{
				Timeout:   30 * time.Second,
				KeepAlive: 30 * time.Second,
				DualStack: true,
			}
			netConn, err := dialer.Dial(network, address)
			if err != nil {
				return netConn, err
			}
			return &conn{
				Conn:         netConn,
				readTimeout:  time.Minute,
				writeTimeout: time.Minute,
			}, nil
		},
		TLSHandshakeTimeout: 10 * time.Second,
		TLSClientConfig:     endpoint.TLSConfig,
		// TODO(dmcgowan): Call close idle connections when complete and use keep alive
		DisableKeepAlives: true,
	}

	modifiers := registry.DockerHeaders(dockerversion.DockerUserAgent(), metaHeaders)
	authTransport := transport.NewTransport(base, modifiers...)
	pingClient := &http.Client{
		Transport: authTransport,
		Timeout:   15 * time.Second,
	}
	endpointStr := strings.TrimRight(endpoint.URL, "/") + "/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()

	v2Version := auth.APIVersion{
		Type:    "registry",
		Version: "2.0",
	}

	versions := auth.APIVersions(resp, registry.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.

			foundVersion = true
			break
		}
	}

	challengeManager := auth.NewSimpleChallengeManager()
	if err := challengeManager.AddResponse(resp); err != nil {
		return nil, foundVersion, err
	}

	if authConfig.RegistryToken != "" {
		passThruTokenHandler := &existingTokenHandler{token: authConfig.RegistryToken}
		modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, passThruTokenHandler))
	} else {
		creds := dumbCredentialStore{auth: authConfig}
		tokenHandler := auth.NewTokenHandler(authTransport, creds, repoName, actions...)
		basicHandler := auth.NewBasicHandler(creds)
		modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler))
	}
	tr := transport.NewTransport(base, modifiers...)

	repo, err = client.NewRepository(ctx, repoName, endpoint.URL, tr)
	return repo, foundVersion, err
}

func (s *TagStore) Pull(image string, tag string, imagePullConfig *ImagePullConfig) error {
	var (
		sf = streamformatter.NewJSONStreamFormatter()
	)

	// Resolve the Repository name from fqn to RepositoryInfo
	repoInfo, err := s.registryService.ResolveRepository(image)
	if err != nil {
		return err
	}

	if err := validateRepoName(repoInfo.LocalName); err != nil {
		return err
	}

	c, err := s.poolAdd("pull", utils.ImageReference(repoInfo.LocalName, tag))
	if err != nil {
		if c != nil {
			// Another pull of the same repository is already taking place; just wait for it to finish
			imagePullConfig.OutStream.Write(sf.FormatStatus("", "Repository %s already being pulled by another client. Waiting.", repoInfo.LocalName))
			<-c
			return nil
		}
		return err
	}
	defer s.poolRemove("pull", utils.ImageReference(repoInfo.LocalName, tag))

	logName := repoInfo.LocalName
	if tag != "" {
		logName = utils.ImageReference(logName, tag)
	}

	// Attempt pulling official content from a provided v2 mirror
	if repoInfo.Index.Official {
		v2mirrorEndpoint, v2mirrorRepoInfo, err := configureV2Mirror(repoInfo, s.registryService)
		if err != nil {
			logrus.Errorf("Error configuring mirrors: %s", err)
			return err
		}

		if v2mirrorEndpoint != nil {
			logrus.Debugf("Attempting to pull from v2 mirror: %s", v2mirrorEndpoint.URL)
			return s.pullFromV2Mirror(v2mirrorEndpoint, v2mirrorRepoInfo, imagePullConfig, tag, sf, logName)
		}
	}

	logrus.Debugf("pulling image from host %q with remote name %q", repoInfo.Index.Name, repoInfo.RemoteName)

	endpoint, err := repoInfo.GetEndpoint(imagePullConfig.MetaHeaders)
	if err != nil {
		return err
	}
	// TODO(tiborvass): reuse client from endpoint?
	// Adds Docker-specific headers as well as user-specified headers (metaHeaders)
	tr := transport.NewTransport(
		registry.NewTransport(registry.ReceiveTimeout, endpoint.IsSecure),
		registry.DockerHeaders(imagePullConfig.MetaHeaders)...,
	)
	client := registry.HTTPClient(tr)
	r, err := registry.NewSession(client, imagePullConfig.AuthConfig, endpoint)
	if err != nil {
		return err
	}

	if len(repoInfo.Index.Mirrors) == 0 && (repoInfo.Index.Official || endpoint.Version == registry.APIVersion2) {
		if repoInfo.Official {
			s.trustService.UpdateBase()
		}

		logrus.Debugf("pulling v2 repository with local name %q", repoInfo.LocalName)
		if err := s.pullV2Repository(r, imagePullConfig.OutStream, repoInfo, tag, sf); err == nil {
			s.eventsService.Log("pull", logName, "")
			return nil
		} else if err != registry.ErrDoesNotExist && err != ErrV2RegistryUnavailable {
			logrus.Errorf("Error from V2 registry: %s", err)
		}

		logrus.Debug("image does not exist on v2 registry, falling back to v1")
	}

	if utils.DigestReference(tag) {
		return fmt.Errorf("pulling with digest reference failed from v2 registry")
	}

	logrus.Debugf("pulling v1 repository with local name %q", repoInfo.LocalName)
	if err = s.pullRepository(r, imagePullConfig.OutStream, repoInfo, tag, sf); err != nil {
		return err
	}

	s.eventsService.Log("pull", logName, "")

	return nil

}

// FIXME: Allow to interrupt current push when new push of same image is done.
func (s *TagStore) Push(localName string, imagePushConfig *ImagePushConfig) error {
	var (
		sf = streamformatter.NewJSONStreamFormatter()
	)

	// Resolve the Repository name from fqn to RepositoryInfo
	repoInfo, err := s.registryService.ResolveRepository(localName)
	if err != nil {
		return err
	}

	if _, err := s.poolAdd("push", repoInfo.LocalName); err != nil {
		return err
	}
	defer s.poolRemove("push", repoInfo.LocalName)

	endpoint, err := repoInfo.GetEndpoint(imagePushConfig.MetaHeaders)
	if err != nil {
		return err
	}
	// TODO(tiborvass): reuse client from endpoint?
	// Adds Docker-specific headers as well as user-specified headers (metaHeaders)
	tr := transport.NewTransport(
		registry.NewTransport(registry.NoTimeout, endpoint.IsSecure),
		registry.DockerHeaders(imagePushConfig.MetaHeaders)...,
	)
	client := registry.HTTPClient(tr)
	r, err := registry.NewSession(client, imagePushConfig.AuthConfig, endpoint)
	if err != nil {
		return err
	}

	reposLen := 1
	if imagePushConfig.Tag == "" {
		reposLen = len(s.Repositories[repoInfo.LocalName])
	}

	imagePushConfig.OutStream.Write(sf.FormatStatus("", "The push refers to a repository [%s] (len: %d)", repoInfo.CanonicalName, reposLen))

	// If it fails, try to get the repository
	localRepo, exists := s.Repositories[repoInfo.LocalName]
	if !exists {
		return fmt.Errorf("Repository does not exist: %s", repoInfo.LocalName)
	}

	if repoInfo.Index.Official || endpoint.Version == registry.APIVersion2 {
		err := s.pushV2Repository(r, localRepo, imagePushConfig.OutStream, repoInfo, imagePushConfig.Tag, sf)
		if err == nil {
			s.eventsService.Log("push", repoInfo.LocalName, "")
			return nil
		}

		if err != ErrV2RegistryUnavailable {
			return fmt.Errorf("Error pushing to registry: %s", err)
		}
	}

	if err := s.pushRepository(r, imagePushConfig.OutStream, repoInfo, localRepo, imagePushConfig.Tag, sf); err != nil {
		return err
	}
	s.eventsService.Log("push", repoInfo.LocalName, "")
	return nil

}

// NewV2Repository returns a repository (v2 only). It creates a HTTP transport
// providing timeout settings and authentication support, and also verifies the
// remote API version.
func NewV2Repository(ctx context.Context, repoInfo *registry.RepositoryInfo, endpoint registry.APIEndpoint, metaHeaders http.Header, authConfig *types.AuthConfig, actions ...string) (repo distribution.Repository, foundVersion bool, err error) {
	repoName := repoInfo.FullName()
	// If endpoint does not support CanonicalName, use the RemoteName instead
	if endpoint.TrimHostname {
		repoName = repoInfo.RemoteName()
	}

	// TODO(dmcgowan): Call close idle connections when complete, use keep alive
	base := &http.Transport{
		Proxy: http.ProxyFromEnvironment,
		Dial: (&net.Dialer{
			Timeout:   30 * time.Second,
			KeepAlive: 30 * time.Second,
			DualStack: true,
		}).Dial,
		TLSHandshakeTimeout: 10 * time.Second,
		TLSClientConfig:     endpoint.TLSConfig,
		// TODO(dmcgowan): Call close idle connections when complete and use keep alive
		DisableKeepAlives: true,
	}

	modifiers := registry.DockerHeaders(dockerversion.DockerUserAgent(), metaHeaders)
	authTransport := transport.NewTransport(base, modifiers...)

	challengeManager, foundVersion, err := registry.PingV2Registry(endpoint, authTransport)
	if err != nil {
		transportOK := false
		if responseErr, ok := err.(registry.PingResponseError); ok {
			transportOK = true
			err = responseErr.Err
		}
		return nil, foundVersion, fallbackError{
			err:         err,
			confirmedV2: foundVersion,
			transportOK: transportOK,
		}
	}

	if authConfig.RegistryToken != "" {
		passThruTokenHandler := &existingTokenHandler{token: authConfig.RegistryToken}
		modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, passThruTokenHandler))
	} else {
		creds := dumbCredentialStore{auth: authConfig}
		tokenHandler := auth.NewTokenHandler(authTransport, creds, repoName, actions...)
		basicHandler := auth.NewBasicHandler(creds)
		modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler))
	}
	tr := transport.NewTransport(base, modifiers...)

	repoNameRef, err := distreference.ParseNamed(repoName)
	if err != nil {
		return nil, foundVersion, fallbackError{
			err:         err,
			confirmedV2: foundVersion,
			transportOK: true,
		}
	}

	repo, err = client.NewRepository(ctx, repoNameRef, endpoint.URL.String(), tr)
	if err != nil {
		err = fallbackError{
			err:         err,
			confirmedV2: foundVersion,
			transportOK: true,
		}
	}
	return
}

func (cli *DockerCli) getNotaryRepository(repoInfo *registry.RepositoryInfo, authConfig cliconfig.AuthConfig) (*client.NotaryRepository, error) {
	server := trustServer(repoInfo.Index)
	if !strings.HasPrefix(server, "https://") {
		return nil, errors.New("unsupported scheme: https required for trust server")
	}

	var cfg = tlsconfig.ClientDefault
	cfg.InsecureSkipVerify = !repoInfo.Index.Secure

	// Get certificate base directory
	certDir, err := cli.certificateDirectory(server)
	if err != nil {
		return nil, err
	}
	logrus.Debugf("reading certificate directory: %s", certDir)

	if err := registry.ReadCertsDirectory(&cfg, certDir); err != nil {
		return nil, err
	}

	base := &http.Transport{
		Proxy: http.ProxyFromEnvironment,
		Dial: (&net.Dialer{
			Timeout:   30 * time.Second,
			KeepAlive: 30 * time.Second,
			DualStack: true,
		}).Dial,
		TLSHandshakeTimeout: 10 * time.Second,
		TLSClientConfig:     &cfg,
		DisableKeepAlives:   true,
	}

	// Skip configuration headers since request is not going to Docker daemon
	modifiers := registry.DockerHeaders(http.Header{})
	authTransport := transport.NewTransport(base, modifiers...)
	pingClient := &http.Client{
		Transport: authTransport,
		Timeout:   5 * time.Second,
	}
	endpointStr := server + "/v2/"
	req, err := http.NewRequest("GET", endpointStr, nil)
	if err != nil {
		return nil, err
	}
	resp, err := pingClient.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	challengeManager := auth.NewSimpleChallengeManager()
	if err := challengeManager.AddResponse(resp); err != nil {
		return nil, err
	}

	creds := simpleCredentialStore{auth: authConfig}
	tokenHandler := auth.NewTokenHandler(authTransport, creds, repoInfo.CanonicalName, "push", "pull")
	basicHandler := auth.NewBasicHandler(creds)
	modifiers = append(modifiers, transport.RequestModifier(auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler)))
	tr := transport.NewTransport(base, modifiers...)

	return client.NewNotaryRepository(cli.trustDirectory(), repoInfo.CanonicalName, server, tr, cli.getPassphraseRetriever())
}

// NewV2Repository returns a repository (v2 only). It creates an HTTP transport
// providing timeout settings and authentication support, and also verifies the
// remote API version.
func NewV2Repository(ctx context.Context, repoInfo *registry.RepositoryInfo, endpoint registry.APIEndpoint, metaHeaders http.Header, authConfig *types.AuthConfig, actions ...string) (repo distribution.Repository, foundVersion bool, err error) {
	repoName := repoInfo.FullName()
	// If endpoint does not support CanonicalName, use the RemoteName instead
	if endpoint.TrimHostname {
		repoName = repoInfo.RemoteName()
	}

	direct := &net.Dialer{
		Timeout:   30 * time.Second,
		KeepAlive: 30 * time.Second,
		DualStack: true,
	}

	// TODO(dmcgowan): Call close idle connections when complete, use keep alive
	base := &http.Transport{
		Proxy:               http.ProxyFromEnvironment,
		Dial:                direct.Dial,
		TLSHandshakeTimeout: 10 * time.Second,
		TLSClientConfig:     endpoint.TLSConfig,
		// TODO(dmcgowan): Call close idle connections when complete and use keep alive
		DisableKeepAlives: true,
	}

	proxyDialer, err := sockets.DialerFromEnvironment(direct)
	if err == nil {
		base.Dial = proxyDialer.Dial
	}

	modifiers := registry.DockerHeaders(dockerversion.DockerUserAgent(ctx), metaHeaders)
	authTransport := transport.NewTransport(base, modifiers...)

	challengeManager, foundVersion, err := registry.PingV2Registry(endpoint.URL, authTransport)
	if err != nil {
		transportOK := false
		if responseErr, ok := err.(registry.PingResponseError); ok {
			transportOK = true
			err = responseErr.Err
		}
		return nil, foundVersion, fallbackError{
			err:         err,
			confirmedV2: foundVersion,
			transportOK: transportOK,
		}
	}

	if authConfig.RegistryToken != "" {
		passThruTokenHandler := &existingTokenHandler{token: authConfig.RegistryToken}
		modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, passThruTokenHandler))
	} else {
		scope := auth.RepositoryScope{
			Repository: repoName,
			Actions:    actions,
		}

		// Keep image repositories blank for scope compatibility
		if repoInfo.Class != "image" {
			scope.Class = repoInfo.Class
		}

		creds := registry.NewStaticCredentialStore(authConfig)
		tokenHandlerOptions := auth.TokenHandlerOptions{
			Transport:   authTransport,
			Credentials: creds,
			Scopes:      []auth.Scope{scope},
			ClientID:    registry.AuthClientID,
		}
		tokenHandler := auth.NewTokenHandlerWithOptions(tokenHandlerOptions)
		basicHandler := auth.NewBasicHandler(creds)
		modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler))
	}
	tr := transport.NewTransport(base, modifiers...)

	repoNameRef, err := distreference.ParseNamed(repoName)
	if err != nil {
		return nil, foundVersion, fallbackError{
			err:         err,
			confirmedV2: foundVersion,
			transportOK: true,
		}
	}

	repo, err = client.NewRepository(ctx, repoNameRef, endpoint.URL.String(), tr)
	if err != nil {
		err = fallbackError{
			err:         err,
			confirmedV2: foundVersion,
			transportOK: true,
		}
	}
	return
}