package registry import ( "crypto/tls" "fmt" "net/http" "net/url" "runtime" "strings" "github.com/docker/distribution/registry/client/auth" "github.com/docker/docker/cliconfig" "github.com/docker/docker/pkg/tlsconfig" ) // Service is a registry service. It tracks configuration data such as a list // of mirrors. type Service struct { Config *ServiceConfig } // NewService returns a new instance of Service ready to be // installed into an engine. func NewService(options *Options) *Service { return &Service{ Config: NewServiceConfig(options), } } // Auth contacts the public registry with the provided credentials, // and returns OK if authentication was sucessful. // It can be used to verify the validity of a client's credentials. func (s *Service) Auth(authConfig *cliconfig.AuthConfig) (string, error) { addr := authConfig.ServerAddress if addr == "" { // Use the official registry address if not specified. addr = IndexServer } index, err := s.ResolveIndex(addr) if err != nil { return "", err } endpoint, err := NewEndpoint(index, nil) if err != nil { return "", err } authConfig.ServerAddress = endpoint.String() return Login(authConfig, endpoint) } // Search queries the public registry for images matching the specified // search terms, and returns the results. func (s *Service) Search(term string, authConfig *cliconfig.AuthConfig, headers map[string][]string) (*SearchResults, error) { repoInfo, err := s.ResolveRepository(term) if err != nil { return nil, err } // *TODO: Search multiple indexes. endpoint, err := repoInfo.GetEndpoint(http.Header(headers)) if err != nil { return nil, err } r, err := NewSession(endpoint.client, authConfig, endpoint) if err != nil { return nil, err } return r.SearchRepositories(repoInfo.GetSearchTerm()) } // ResolveRepository splits a repository name into its components // and configuration of the associated registry. func (s *Service) ResolveRepository(name string) (*RepositoryInfo, error) { return s.Config.NewRepositoryInfo(name) } // ResolveIndex takes indexName and returns index info func (s *Service) ResolveIndex(name string) (*IndexInfo, error) { return s.Config.NewIndexInfo(name) } // APIEndpoint represents a remote API endpoint type APIEndpoint struct { Mirror bool URL string Version APIVersion Official bool TrimHostname bool TLSConfig *tls.Config VersionHeader string Versions []auth.APIVersion } // ToV1Endpoint returns a V1 API endpoint based on the APIEndpoint func (e APIEndpoint) ToV1Endpoint(metaHeaders http.Header) (*Endpoint, error) { return newEndpoint(e.URL, e.TLSConfig, metaHeaders) } // TLSConfig constructs a client TLS configuration based on server defaults func (s *Service) TLSConfig(hostname string) (*tls.Config, error) { return newTLSConfig(hostname, s.Config.isSecureIndex(hostname)) } func (s *Service) tlsConfigForMirror(mirror string) (*tls.Config, error) { mirrorURL, err := url.Parse(mirror) if err != nil { return nil, err } return s.TLSConfig(mirrorURL.Host) } // LookupEndpoints creates an list of endpoints to try, in order of preference. // It gives preference to v2 endpoints over v1, mirrors over the actual // registry, and HTTPS over plain HTTP. func (s *Service) LookupEndpoints(repoName string) (endpoints []APIEndpoint, err error) { var cfg = tlsconfig.ServerDefault tlsConfig := &cfg if strings.HasPrefix(repoName, DefaultNamespace+"/") { // v2 mirrors for _, mirror := range s.Config.Mirrors { mirrorTLSConfig, err := s.tlsConfigForMirror(mirror) if err != nil { return nil, err } endpoints = append(endpoints, APIEndpoint{ URL: mirror, // guess mirrors are v2 Version: APIVersion2, Mirror: true, TrimHostname: true, TLSConfig: mirrorTLSConfig, }) } // v2 registry endpoints = append(endpoints, APIEndpoint{ URL: DefaultV2Registry, Version: APIVersion2, Official: true, TrimHostname: true, TLSConfig: tlsConfig, }) if runtime.GOOS == "linux" { // do not inherit legacy API for OSes supported in the future // v1 registry endpoints = append(endpoints, APIEndpoint{ URL: DefaultV1Registry, Version: APIVersion1, Official: true, TrimHostname: true, TLSConfig: tlsConfig, }) } return endpoints, nil } slashIndex := strings.IndexRune(repoName, '/') if slashIndex <= 0 { return nil, fmt.Errorf("invalid repo name: missing '/': %s", repoName) } hostname := repoName[:slashIndex] tlsConfig, err = s.TLSConfig(hostname) if err != nil { return nil, err } isSecure := !tlsConfig.InsecureSkipVerify v2Versions := []auth.APIVersion{ { Type: "registry", Version: "2.0", }, } endpoints = []APIEndpoint{ { URL: "https://" + hostname, Version: APIVersion2, TrimHostname: true, TLSConfig: tlsConfig, VersionHeader: DefaultRegistryVersionHeader, Versions: v2Versions, }, { URL: "https://" + hostname, Version: APIVersion1, TrimHostname: true, TLSConfig: tlsConfig, }, } if !isSecure { endpoints = append(endpoints, APIEndpoint{ URL: "http://" + hostname, Version: APIVersion2, TrimHostname: true, // used to check if supposed to be secure via InsecureSkipVerify TLSConfig: tlsConfig, VersionHeader: DefaultRegistryVersionHeader, Versions: v2Versions, }, APIEndpoint{ URL: "http://" + hostname, Version: APIVersion1, TrimHostname: true, // used to check if supposed to be secure via InsecureSkipVerify TLSConfig: tlsConfig, }) } return endpoints, nil }